{"id":11542,"date":"2026-06-02T09:25:58","date_gmt":"2026-06-02T09:25:58","guid":{"rendered":"https:\/\/www.kscranegroup.com\/?post_type=posts&#038;p=11542"},"modified":"2026-06-02T09:26:03","modified_gmt":"2026-06-02T09:26:03","slug":"overhead-crane-structural-failures-girder-cracks-deformation-inspection-guide","status":"publish","type":"posts","link":"https:\/\/www.kscranegroup.com\/vi\/posts\/overhead-crane-structural-failures-girder-cracks-deformation-inspection-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 k\u1ebft c\u1ea5u c\u1ea7n c\u1ea9u tr\u00ean cao: N\u1ee9t d\u1ea7m, bi\u1ebfn d\u1ea1ng v\u00e0 h\u01b0\u1edbng d\u1eabn ki\u1ec3m tra"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>M\u1ee5c l\u1ee5c<\/p><nav><ul><li><a href=\"#part-1-five-structural-failure-modes\">Ph\u1ea7n 1: N\u0103m ki\u1ec3u h\u1ecfng h\u00f3c c\u1ea5u tr\u00fac<\/a><ul><li><a href=\"#1-main-girder-web-or-cover-plate-fatigue-cracks\">1. C\u00e1c v\u1ebft n\u1ee9t do m\u1ecfi \u1edf b\u1ea3n b\u1ee5ng d\u1ea7m ch\u00ednh ho\u1eb7c t\u1ea5m che<\/a><\/li><li><a href=\"#2-splice-weld-or-truss-node-weld-cracking\">2. N\u1ee9t m\u1ed1i h\u00e0n n\u1ed1i ho\u1eb7c m\u1ed1i h\u00e0n n\u00fat gi\u00e0n<\/a><\/li><li><a href=\"#3-main-girder-web-buckling-wave-deformation\">3. Hi\u1ec7n t\u01b0\u1ee3ng u\u1ed1n cong d\u1ea1ng s\u00f3ng c\u1ee7a b\u1ea3n b\u1ee5ng d\u1ea7m ch\u00ednh<\/a><\/li><li><a href=\"#4-main-girder-sideways-bending-horizontal-sweep-bow\">4. U\u1ed1n cong ngang d\u1ea7m ch\u00ednh (U\u1ed1n cong\/U\u1ed1n v\u00f2ng cung)<\/a><\/li><li><a href=\"#5-main-girder-downward-deflection-sinking-permanent-set\">5. \u0110\u1ed9 v\u00f5ng xu\u1ed1ng c\u1ee7a d\u1ea7m ch\u00ednh (L\u00fan\/L\u00fan v\u0129nh vi\u1ec5n)<\/a><\/li><\/ul><\/li><li><a href=\"#part-2-ndt-inspection-methods-for-steel-structures\">Ph\u1ea7n 2: C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (NDT) \u0111\u1ed1i v\u1edbi k\u1ebft c\u1ea5u th\u00e9p<\/a><\/li><li><a href=\"#part-3-pre-shift-structural-inspection-checklist\">Ph\u1ea7n 3: Danh s\u00e1ch ki\u1ec3m tra c\u1ea5u tr\u00fac tr\u01b0\u1edbc ca l\u00e0m vi\u1ec7c<\/a><\/li><li><a href=\"#quick-reference-structural-repair-decision-matrix\">H\u01b0\u1edbng d\u1eabn tham kh\u1ea3o nhanh: Ma tr\u1eadn quy\u1ebft \u0111\u1ecbnh s\u1eeda ch\u1eefa k\u1ebft c\u1ea5u<\/a><\/li><li><a href=\"#how-to-prevent-overhead-crane-structural-failures\">C\u00e1ch ph\u00f2ng ng\u1eeba h\u01b0 h\u1ecfng k\u1ebft c\u1ea5u c\u1ea7n c\u1ea9u tr\u00ean cao<\/a><ul><li><a href=\"#avoid-overloading\">Tr\u00e1nh qu\u00e1 t\u1ea3i<\/a><\/li><li><a href=\"#conduct-scheduled-structural-inspections\">Ti\u1ebfn h\u00e0nh ki\u1ec3m tra c\u1ea5u tr\u00fac \u0111\u1ecbnh k\u1ef3.<\/a><\/li><li><a href=\"#maintain-proper-rail-alignment\">\u0110\u1ea3m b\u1ea3o \u0111\u01b0\u1eddng ray th\u1eb3ng h\u00e0ng<\/a><\/li><li><a href=\"#monitor-thermal-effects\">Theo d\u00f5i hi\u1ec7u \u1ee9ng nhi\u1ec7t<\/a><\/li><li><a href=\"#repair-minor-defects-early\">S\u1eeda ch\u1eefa c\u00e1c l\u1ed7i nh\u1ecf s\u1edbm<\/a><\/li><\/ul><\/li><li><a href=\"#need-expert-support\">C\u1ea7n h\u1ed7 tr\u1ee3 chuy\u00ean gia?<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Phanh h\u1ecfng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay th\u1ebf. H\u1ed9p s\u1ed1 b\u1ecb h\u01b0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa. Nh\u01b0ng khi ch\u00ednh k\u1ebft c\u1ea5u th\u00e9p b\u1eaft \u0111\u1ea7u n\u1ee9t, bi\u1ebfn d\u1ea1ng ho\u1eb7c b\u1ecb v\u00f5ng v\u0129nh vi\u1ec5n, h\u1eadu qu\u1ea3 s\u1ebd nghi\u00eam tr\u1ecdng h\u01a1n nhi\u1ec1u.<\/p>\n\n\n\n<p>H\u1ecfng h\u00f3c k\u1ebft c\u1ea5u c\u1ea7n c\u1ea9u tr\u00ean cao l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 nguy hi\u1ec3m v\u00e0 t\u1ed1n k\u00e9m nh\u1ea5t trong h\u1ec7 th\u1ed1ng n\u00e2ng h\u1ea1 c\u00f4ng nghi\u1ec7p. H\u01b0 h\u1ecfng k\u1ebft c\u1ea5u c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i, g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u0103n ch\u1ec9nh, \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh m\u1ecfi v\u1eadt li\u1ec7u, v\u00e0 trong tr\u01b0\u1eddng h\u1ee3p nghi\u00eam tr\u1ecdng, d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 s\u1eadp c\u1ea7n c\u1ea9u th\u1ea3m kh\u1ed1c.<\/p>\n\n\n\n<p>C\u00e1c d\u1ea1ng h\u01b0 h\u1ecfng k\u1ebft c\u1ea5u ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a c\u1ea7n c\u1ea9u tr\u00ean cao bao g\u1ed3m n\u1ee9t m\u1ecfi d\u1ea7m, n\u1ee9t m\u1ed1i h\u00e0n n\u1ed1i, cong v\u00eanh b\u1ea3n b\u1ee5ng, bi\u1ebfn d\u1ea1ng qu\u00e9t ngang v\u00e0 \u0111\u1ed9 v\u00f5ng xu\u1ed1ng v\u0129nh vi\u1ec5n. Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y th\u01b0\u1eddng do v\u1eadn h\u00e0nh qu\u00e1 t\u1ea3i, ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n k\u00e9m, t\u00edch t\u1ee5 m\u1ecfi, ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c v\u1eadn chuy\u1ec3n v\u00e0 b\u1ea3o qu\u1ea3n kh\u00f4ng \u0111\u00fang c\u00e1ch g\u00e2y ra.<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch x\u00e1c \u0111\u1ecbnh nh\u1eefng tr\u01b0\u1eddng h\u1ee3p ph\u1ed5 bi\u1ebfn nh\u1ea5t. <a href=\"https:\/\/www.kscranegroup.com\/vi\/overhead-cranes\/\">c\u1ea7n c\u1ea9u tr\u00ean cao<\/a> X\u00e1c \u0111\u1ecbnh c\u00e1c s\u1ef1 c\u1ed1 v\u1ec1 c\u1ea5u tr\u00fac, hi\u1ec3u r\u00f5 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a ch\u00fang, \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1eeda ch\u1eefa th\u00edch h\u1ee3p v\u00e0 thi\u1ebft l\u1eadp m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh ki\u1ec3m tra \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a c\u1ea7n c\u1ea9u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"part-1-five-structural-failure-modes\">Ph\u1ea7n 1: N\u0103m ki\u1ec3u h\u1ecfng h\u00f3c c\u1ea5u tr\u00fac<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/1Overhead-Crane-Structural-Failures.jpg\" alt=\"\" class=\"wp-image-11543\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-main-girder-web-or-cover-plate-fatigue-cracks\">1. C\u00e1c v\u1ebft n\u1ee9t do m\u1ecfi \u1edf b\u1ea3n b\u1ee5ng d\u1ea7m ch\u00ednh ho\u1eb7c t\u1ea5m che<\/h3>\n\n\n\n<p><strong>Nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u1ea5y:<\/strong> C\u00e1c v\u1ebft n\u1ee9t nh\u1ecf tr\u00ean b\u1ea3n b\u1ee5ng ho\u1eb7c b\u1ea3n n\u1eafp \u0111\u00e1y\/tr\u00ean c\u1ee7a d\u1ea7m h\u1ed9p. Th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf c\u00e1c m\u1ed1i h\u00e0n, \u0111i\u1ec3m k\u1ebft th\u00fac c\u1ee7a thanh gia c\u01b0\u1eddng ho\u1eb7c c\u00e1c khu v\u1ef1c t\u1eadp trung \u1ee9ng su\u1ea5t h\u00ecnh h\u1ecdc.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>G\u00e2y ra<\/th><th>Chi ti\u1ebft k\u1ef9 thu\u1eadt<\/th><\/tr><\/thead><tbody><tr><td>V\u1eadn h\u00e0nh qu\u00e1 t\u1ea3i d\u00e0i h\u1ea1n<\/td><td>Bi\u00ean \u0111\u1ed9 \u1ee9ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n m\u1ecfi c\u1ee7a chi ti\u1ebft h\u00e0n.<\/td><\/tr><tr><td>Tu\u1ed5i th\u1ecd m\u1ecfi thi\u1ebft k\u1ebf v\u01b0\u1ee3t qu\u00e1<\/td><td>S\u1ef1 kh\u00f4ng kh\u1edbp gi\u1eefa ph\u00e2n lo\u1ea1i d\u1ecbch v\u1ee5 CMAA \/ FEM v\u1edbi chu k\u1ef3 l\u00e0m vi\u1ec7c th\u1ef1c t\u1ebf<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>M\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng c\u1ee7a v\u1ebft n\u1ee9t<\/th><th>Th\u1ee7 t\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td>\u2264 0,1 mm (b\u1ec1 m\u1eb7t)<\/td><td>M\u00e0i nh\u1eb5n b\u1eb1ng b\u00e1nh m\u00e0i; ki\u1ec3m tra xem \u0111\u00e3 lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n b\u1eb1ng ch\u1ea5t th\u1ea9m th\u1ea5u m\u00e0u (PT).<\/td><\/tr><tr><td>&gt; 0,1 mm<\/td><td>Drill \u2265 \u03c68 mm stop holes at both crack tips; gouge to 60\u00b0 included-angle groove along the crack path; weld-fill with qualified procedure (low-hydrogen electrode); grind flush<\/td><\/tr><tr><td>Tr\u00ean \u0111o\u1ea1n ch\u1ecbu t\u1ea3i tr\u1ecdng quan tr\u1ecdng<\/td><td>Sau khi s\u1eeda ch\u1eefa m\u1ed1i h\u00e0n, h\u00e3y th\u00eam m\u1ed9t t\u1ea5m gia c\u01b0\u1eddng (h\u00e0n xuy\u00ean su\u1ed1t ho\u1eb7c h\u00e0n g\u00f3c theo \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt) \u0111\u1ec3 kh\u00f4i ph\u1ee5c l\u1ea1i \u0111\u1ed9 b\u1ec1n ban \u0111\u1ea7u.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Sau khi s\u1eeda ch\u1eefa m\u1ed1i h\u00e0n tr\u00ean chi ti\u1ebft ch\u00ednh:<\/strong> Ti\u1ebfn h\u00e0nh ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (UT ho\u1eb7c MT) v\u00e0 ki\u1ec3m tra t\u1ea3i tr\u1ecdng \u0111\u1ecbnh m\u1ee9c 125% tr\u01b0\u1edbc khi \u0111\u01b0a tr\u1edf l\u1ea1i ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-splice-weld-or-truss-node-weld-cracking\">2. N\u1ee9t m\u1ed1i h\u00e0n n\u1ed1i ho\u1eb7c m\u1ed1i h\u00e0n n\u00fat gi\u00e0n<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"554\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/2Splice-Weld-or-Truss-Node-Weld-Cracking.png\" alt=\"\" class=\"wp-image-11544\"\/><\/figure>\n\n\n\n<p><strong>Nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u1ea5y:<\/strong> C\u00e1c m\u1ed1i h\u00e0n b\u1ecb n\u1ee9t ho\u1eb7c t\u00e1ch r\u1eddi t\u1ea1i c\u00e1c kh\u1edbp n\u1ed1i d\u1ea7m, c\u00e1c m\u1ed1i n\u1ed1i gi\u1eefa v\u00e1ch ng\u0103n v\u00e0 th\u00e2n d\u1ea7m, ho\u1eb7c c\u00e1c t\u1ea5m gi\u1eb1ng t\u1ea1i c\u00e1c n\u00fat gi\u00e0n.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>G\u00e2y ra<\/th><th>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td>C\u00e1c khuy\u1ebft t\u1eadt ban \u0111\u1ea7u c\u1ee7a m\u1ed1i h\u00e0n (l\u1ed7 r\u1ed7, t\u1ea1p ch\u1ea5t x\u1ec9, thi\u1ebfu li\u00ean k\u1ebft)<\/td><td>\u0110\u1ee5c b\u1ecf m\u1ed1i h\u00e0n b\u1ecb l\u1ed7i; h\u00e0n l\u1ea1i b\u1eb1ng que h\u00e0n c\u00f3 h\u00e0m l\u01b0\u1ee3ng hydro th\u1ea5p \u0111\u1ea1t ti\u00eau chu\u1ea9n.<\/td><\/tr><tr><td>Qu\u00e1 t\u1ea3i l\u00e2u d\u00e0i<\/td><td><strong>Ng\u1eebng v\u1eadn h\u00e0nh qu\u00e1 t\u1ea3i ngay l\u1eadp t\u1ee9c.<\/strong> \u2014 Vi\u1ec7c s\u1eeda ch\u1eefa s\u1ebd kh\u00f4ng hi\u1ec7u qu\u1ea3 n\u1ebfu t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i ti\u1ebfp di\u1ec5n.<\/td><\/tr><tr><td>\u1ee8ng su\u1ea5t d\u01b0 qu\u00e1 m\u1ee9c do qu\u00e1 tr\u00ecnh h\u00e0n ban \u0111\u1ea7u k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng.<\/td><td>H\u00e0n l\u1ea1i theo \u0111\u00fang tr\u00ecnh t\u1ef1 (h\u00e0n l\u00f9i, h\u00e0n b\u1ecf qua) \u0111\u1ec3 ki\u1ec3m so\u00e1t bi\u1ebfn d\u1ea1ng v\u00e0 \u1ee9ng su\u1ea5t d\u01b0.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Nguy\u00ean t\u1eafc ch\u00ednh:<\/strong> Kh\u00f4ng th\u1ec3 h\u00e0n s\u1eeda ch\u1eefa v\u1ebft n\u1ee9t \u0111ang ti\u1ebfp t\u1ee5c lan r\u1ed9ng do qu\u00e1 t\u1ea3i. H\u00e3y kh\u1eafc ph\u1ee5c nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 (t\u1ea3i tr\u1ecdng, sai l\u1ec7ch, t\u00ecnh tr\u1ea1ng \u0111\u01b0\u1eddng ray) tr\u01b0\u1edbc, sau \u0111\u00f3 m\u1edbi s\u1eeda ch\u1eefa ph\u1ea7n th\u00e9p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-main-girder-web-buckling-wave-deformation\">3. Hi\u1ec7n t\u01b0\u1ee3ng u\u1ed1n cong d\u1ea1ng s\u00f3ng c\u1ee7a b\u1ea3n b\u1ee5ng d\u1ea7m ch\u00ednh<\/h3>\n\n\n\n<p><strong>Nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u1ea5y:<\/strong> C\u00e1c g\u1ee3n s\u00f3ng ho\u1eb7c v\u1ebft l\u01b0\u1ee3n s\u00f3ng c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y tr\u00ean b\u1ea3n b\u1ee5ng d\u1ea7m, th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf v\u00f9ng ch\u1ecbu n\u00e9n g\u1ea7n m\u1eb7t b\u00edch tr\u00ean ho\u1eb7c \u1edf c\u00e1c v\u00f9ng ch\u1ecbu l\u1ef1c c\u1eaft cao g\u1ea7n c\u00e1c g\u1ed1i \u0111\u1ee1.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>G\u00e2y ra<\/th><th>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td>\u1ee8ng su\u1ea5t n\u00e9n d\u01b0 do h\u00e0n g\u00e2y ra trong qu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o<\/td><td><strong>L\u00e0m th\u1eb3ng b\u1eb1ng ng\u1ecdn l\u1eeda (gia nhi\u1ec7t theo \u0111\u01b0\u1eddng th\u1eb3ng):<\/strong> \u00c1p d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng gia nhi\u1ec7t c\u00f3 ki\u1ec3m so\u00e1t trong v\u00f9ng ch\u1ecbu l\u1ef1c c\u0103ng \u0111\u1ec3 l\u00e0m co v\u00e0 k\u00e9o ph\u1eb3ng t\u1ea5m v\u1eadt li\u1ec7u. Ti\u1ebfp theo l\u00e0 x\u1eed l\u00fd b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p b\u1eafn c\u01a1 h\u1ecdc \u0111\u1ec3 gi\u1ea3i ph\u00f3ng \u1ee9ng su\u1ea5t d\u01b0.<\/td><\/tr><tr><td>Qu\u00e1 t\u1ea3i g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9 c\u1ee7a t\u1ea5m v\u00e1ch (u\u1ed1n cong do l\u1ef1c c\u1eaft)<\/td><td><strong>Ng\u1eebng qu\u00e1 t\u1ea3i ngay l\u1eadp t\u1ee9c.<\/strong> Sau khi x\u1eed l\u00fd ch\u1ed1ng ch\u00e1y, h\u00e3y c\u00e2n nh\u1eafc b\u1ed5 sung c\u00e1c thanh gia c\u01b0\u1eddng trung gian \u0111\u1ec3 gi\u1ea3m t\u1ef7 l\u1ec7 chi\u1ec1u d\u00e0i\/chi\u1ec1u r\u1ed9ng c\u1ee7a t\u1ea5m v\u00e1ch v\u00e0 t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng u\u1ed1n cong.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>C\u00e1c th\u00f4ng s\u1ed1 l\u00e0m th\u1eb3ng ng\u1ecdn l\u1eeda (h\u01b0\u1edbng d\u1eabn):<\/strong><\/p>\n\n\n\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9: 600\u2013650\u00b0C (m\u00e0u \u0111\u1ecf nh\u1ea1t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu)<\/li>\n\n\n\n<li>M\u00f4 h\u00ecnh gia nhi\u1ec7t: H\u00ecnh tam gi\u00e1c ho\u1eb7c h\u00ecnh tuy\u1ebfn t\u00ednh, vu\u00f4ng g\u00f3c v\u1edbi \u0111\u1ec9nh s\u00f3ng.<\/li>\n\n\n\n<li>L\u00e0m ngu\u1ed9i: B\u1eb1ng kh\u00f4ng kh\u00ed t\u0129nh (tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng d\u00f9ng n\u01b0\u1edbc \u0111\u1ec3 l\u00e0m ngu\u1ed9i \u2013 c\u00f3 nguy c\u01a1 h\u00ecnh th\u00e0nh mactenxit v\u00e0 n\u1ee9t v\u1ee1)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-main-girder-sideways-bending-horizontal-sweep-bow\">4. U\u1ed1n cong ngang d\u1ea7m ch\u00ednh (U\u1ed1n cong\/U\u1ed1n v\u00f2ng cung)<\/h3>\n\n\n\n<p><strong>Nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u1ea5y:<\/strong> Khi nh\u00ecn t\u1eeb tr\u00ean xu\u1ed1ng, d\u1ea7m cong v\u1ec1 m\u1ed9t ph\u00eda. \u0110\u1ed9 cong \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u1ed9 l\u1ec7ch ngang so v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng n\u1ed1i hai \u0111\u1ea7u d\u1ea7m.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>G\u00e2y ra<\/th><th>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td>H\u00e0n kh\u00f4ng \u0111\u1ed1i x\u1ee9ng trong qu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o ban \u0111\u1ea7u \u2014 \u1ee9ng su\u1ea5t d\u01b0 k\u1ebft h\u1ee3p v\u1edbi \u1ee9ng su\u1ea5t trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng<\/td><td><strong>Du\u1ed7i th\u1eb3ng b\u1eb1ng ng\u1ecdn l\u1eeda:<\/strong> D\u00f9ng nhi\u1ec7t t\u00e1c \u0111\u1ed9ng v\u00e0o m\u1eb7t l\u1ed3i (ph\u1ed3ng ra ngo\u00e0i) c\u1ee7a d\u1ea7m. S\u1eed d\u1ee5ng k\u00edch n\u00e2ng ho\u1eb7c t\u1eddi c\u01a1 kh\u00ed \u0111\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh.<\/td><\/tr><tr><td>V\u1eadn chuy\u1ec3n ho\u1eb7c b\u1ea3o qu\u1ea3n kh\u00f4ng \u0111\u00fang c\u00e1ch (\u0111\u1ee1 \u1edf nh\u1eefng \u0111i\u1ec3m kh\u00f4ng ph\u00f9 h\u1ee3p, x\u1ebfp ch\u1ed3ng kh\u00f4ng \u0111\u1ec1u)<\/td><td>Ch\u1ec9nh s\u1eeda \u0111\u1ed9 cong v\u00eanh, sau \u0111\u00f3 xem x\u00e9t v\u00e0 th\u1ef1c thi c\u00e1c quy tr\u00ecnh x\u1eed l\u00fd \u0111\u00fang c\u00e1ch.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Ti\u00eau ch\u00ed ch\u1ea5p nh\u1eadn:<\/strong> Theo ti\u00eau chu\u1ea9n CMAA 70, \u0111\u1ed9 l\u1ec7ch \u0111\u1ed9 cong ngang kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 L\/2000 (trong \u0111\u00f3 L = nh\u1ecbp t\u00ednh b\u1eb1ng mm) \u0111\u1ed1i v\u1edbi c\u1ea7n c\u1ea9u m\u1edbi. \u0110\u1ed1i v\u1edbi c\u1ea7n c\u1ea9u \u0111ang s\u1eed d\u1ee5ng, h\u00e3y tham kh\u1ea3o \u00fd ki\u1ebfn nh\u00e0 s\u1ea3n xu\u1ea5t \u2014 nh\u01b0ng b\u1ea5t k\u1ef3 \u0111\u1ed9 l\u1ec7ch n\u00e0o c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y g\u00e2y ra v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u0103n ch\u1ec9nh \u0111\u01b0\u1eddng ray \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"5-main-girder-downward-deflection-sinking-permanent-set\">5. \u0110\u1ed9 v\u00f5ng xu\u1ed1ng c\u1ee7a d\u1ea7m ch\u00ednh (L\u00fan\/L\u00fan v\u0129nh vi\u1ec5n)<\/h3>\n\n\n\n<p><strong>Nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u1ea5y:<\/strong> \u0110\u1ed9 cong h\u01b0\u1edbng l\u00ean c\u1ee7a d\u1ea7m \u0111\u00e3 bi\u1ebfn m\u1ea5t, \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng m\u1eb7t c\u1eaft ph\u1eb3ng ho\u1eb7c v\u00f5ng xu\u1ed1ng. Xe \u0111\u1ea9y ch\u1edf h\u00e0ng kh\u00f4ng c\u00f2n &quot;tr\u00f4i v\u1ec1 gi\u1eefa&quot; n\u1eefa \u2014 m\u00e0 tr\u00f4i v\u1ec1 ph\u00eda hai \u0111\u1ea7u ho\u1eb7c \u0111\u1ee9ng y\u00ean t\u1ea1i ch\u1ed7.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>G\u00e2y ra<\/th><th>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c<\/th><\/tr><\/thead><tbody><tr><td>Bi\u1ebfn d\u1ea1ng c\u1ea5u tr\u00fac do qu\u00e1 t\u1ea3i m\u00e3n t\u00ednh<\/td><td><strong>Du\u1ed7i th\u1eb3ng b\u1eb1ng ng\u1ecdn l\u1eeda<\/strong> d\u1ecdc theo t\u1ea5m che ph\u00eda d\u01b0\u1edbi, c\u1ed9ng th\u00eam <strong>gia c\u01b0\u1eddng b\u1eb1ng c\u00e1c \u0111o\u1ea1n k\u00eanh<\/strong> h\u00e0n n\u1ed1i v\u00e0o m\u1eb7t b\u00edch d\u01b0\u1edbi<\/td><\/tr><tr><td>Hi\u1ec7n t\u01b0\u1ee3ng u\u1ed1n cong b\u1ea3n b\u1ee5ng l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 ti\u1ebft di\u1ec7n d\u1ea7m.<\/td><td>S\u1eed d\u1ee5ng <strong>Ph\u01b0\u01a1ng ph\u00e1p \u1ee9ng su\u1ea5t tr\u01b0\u1edbc:<\/strong> L\u1eafp \u0111\u1eb7t c\u00e1c thanh gi\u1eb1ng b\u00ean d\u01b0\u1edbi d\u1ea7m, c\u0103ng sau \u0111\u1ec3 kh\u00f4i ph\u1ee5c \u0111\u1ed9 cong h\u01b0\u1edbng l\u00ean, sau \u0111\u00f3 kh\u00f3a l\u1ea1i. \u0110\u1ec3 gia c\u1ed1 v\u0129nh vi\u1ec5n, h\u00e3y h\u00e0n c\u00e1c thanh gi\u1eb1ng li\u00ean t\u1ee5c.<\/td><\/tr><tr><td>Hi\u1ec7u \u1ee9ng nhi\u1ec7t (nhi\u1ec7t b\u1ee9c x\u1ea1 t\u1eeb c\u1ea7n c\u1ea9u g\u00e1o m\u00fac kim lo\u1ea1i, \u1ee9ng d\u1ee5ng trong x\u01b0\u1edfng \u0111\u00fac)<\/td><td>B\u1ed5 sung t\u1ea5m ch\u1eafn nhi\u1ec7t; \u0111\u1ed1i v\u1edbi c\u1ea7n c\u1ea9u g\u00e1o m\u00fac, c\u1ea7n ki\u1ec3m tra thi\u1ebft k\u1ebf ban \u0111\u1ea7u \u0111\u00e3 t\u00ednh \u0111\u1ebfn c\u1ea5p \u0111\u1ed9 ch\u1ecbu nhi\u1ec7t.<\/td><\/tr><tr><td>B\u1ea3o qu\u1ea3n ho\u1eb7c v\u1eadn chuy\u1ec3n kh\u00f4ng \u0111\u00fang c\u00e1ch<\/td><td>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 cong cho ph\u00f9 h\u1ee3p, sau \u0111\u00f3 l\u01b0u tr\u1eef\/v\u1eadn chuy\u1ec3n theo s\u01a1 \u0111\u1ed3 n\u00e2ng h\u1ea1 v\u00e0 h\u1ed7 tr\u1ee3 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ea7n c\u1ea9u.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>C\u1ea3nh b\u00e1o nghi\u00eam tr\u1ecdng:<\/strong> D\u1ea7m th\u00e9p b\u1ecb v\u00f5ng v\u0129nh vi\u1ec5n \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n \u0111\u00e0n h\u1ed3i \u2013 th\u00e9p \u0111\u00e3 ch\u1ecbu \u1ee9ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n \u0111\u00e0n h\u1ed3i c\u1ee7a n\u00f3. Ch\u1ec9 ri\u00eang vi\u1ec7c n\u1eafn th\u1eb3ng b\u1eb1ng ng\u1ecdn l\u1eeda c\u00f3 th\u1ec3 kh\u00f4ng kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c ho\u00e0n to\u00e0n tu\u1ed5i th\u1ecd m\u1ecfi. Vi\u1ec7c \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt sau s\u1eeda ch\u1eefa (bao g\u1ed3m c\u1ea3 vi\u1ec7c \u0111\u00e1nh gi\u00e1 l\u1ea1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n) \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb m\u1ea1nh m\u1ebd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"part-2-ndt-inspection-methods-for-steel-structures\">Ph\u1ea7n 2: C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (NDT) \u0111\u1ed1i v\u1edbi k\u1ebft c\u1ea5u th\u00e9p<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1633\" height=\"828\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/3NDT-Inspection-Methods-for-Steel-Structures.png\" alt=\"\" class=\"wp-image-11545\" srcset=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/3NDT-Inspection-Methods-for-Steel-Structures.png 1633w, https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/3NDT-Inspection-Methods-for-Steel-Structures-1536x779.png 1536w\" sizes=\"(max-width: 1633px) 100vw, 1633px\" \/><\/figure>\n\n\n\n<p>Kh\u00f4ng ph\u1ea3i v\u1ebft n\u1ee9t n\u00e0o c\u0169ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c b\u1eb1ng m\u1eaft th\u01b0\u1eddng. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y n\u00e0y theo \u0111\u1ecbnh k\u1ef3:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Ph\u01b0\u01a1ng ph\u00e1p<\/th><th>T\u1ed1t nh\u1ea5t cho<\/th><th>T\u00ednh th\u01b0\u1eddng xuy\u00ean<\/th><th>Ghi ch\u00fa<\/th><\/tr><\/thead><tbody><tr><td><strong>Ki\u1ec3m tra th\u1ecb gi\u00e1c (VT)<\/strong><\/td><td>C\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t, s\u1ef1 \u0103n m\u00f2n, bi\u1ebfn d\u1ea1ng, bu l\u00f4ng l\u1ecfng l\u1ebbo.<\/td><td>M\u1ed7i ca l\u00e0m vi\u1ec7c<\/td><td>\u0110i\u1ec1u quan tr\u1ecdng nh\u1ea5t v\u00e0 b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p nh\u1ea5t<\/td><\/tr><tr><td><strong>H\u1ea1t t\u1eeb t\u00ednh (MT)<\/strong><\/td><td>C\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 g\u1ea7n b\u1ec1 m\u1eb7t trong th\u00e9p t\u1eeb t\u00ednh<\/td><td>H\u00e0ng n\u0103m, ho\u1eb7c sau b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 qu\u00e1 t\u1ea3i n\u00e0o.<\/td><td>Nhanh ch\u00f3ng, d\u1ec5 mang theo, kh\u00f4ng c\u1ea7n chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t ngo\u00e0i vi\u1ec7c l\u00e0m s\u1ea1ch.<\/td><\/tr><tr><td><strong>Ch\u1ea5t th\u1ea9m th\u1ea5u m\u00e0u (PT)<\/strong><\/td><td>C\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t \u2014 c\u00f3 t\u00e1c d\u1ee5ng tr\u00ean m\u1ecdi lo\u1ea1i v\u1eadt li\u1ec7u<\/td><td>H\u00e0ng n\u0103m, ho\u1eb7c \u0111\u1ec3 ki\u1ec3m tra vi\u1ec7c s\u1eeda ch\u1eefa m\u1ed1i h\u00e0n.<\/td><td>\u0110\u01a1n gi\u1ea3n nh\u01b0ng c\u1ea7n b\u1ec1 m\u1eb7t s\u1ea1ch v\u00e0 th\u1eddi gian ch\u1edd.<\/td><\/tr><tr><td><strong>Ki\u1ec3m tra si\u00eau \u00e2m (UT)<\/strong><\/td><td>C\u00e1c khuy\u1ebft t\u1eadt b\u00ean trong \u1edf c\u00e1c ph\u1ea7n d\u00e0y, \u0111o \u0111\u1ed9 s\u00e2u v\u1ebft n\u1ee9t<\/td><td>C\u1ee9 3-5 n\u0103m m\u1ed9t l\u1ea7n, ho\u1eb7c theo y\u00eau c\u1ea7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb g\u1ed1c (OEM).<\/td><td>C\u1ea7n c\u00f3 ng\u01b0\u1eddi v\u1eadn h\u00e0nh \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o v\u00e0 c\u00e1c kh\u1ed1i hi\u1ec7u chu\u1ea9n.<\/td><\/tr><tr><td><strong>Kh\u1ea3o s\u00e1t b\u1eb1ng tia laser \/ m\u00e1y to\u00e0n \u0111\u1ea1c<\/strong><\/td><td>\u0110\u1ed9 cong d\u1ea7m, \u0111\u1ed9 qu\u00e9t v\u00e0 h\u00ecnh h\u1ecdc t\u1ed5ng th\u1ec3<\/td><td>H\u00e0ng n\u0103m<\/td><td>So s\u00e1nh v\u1edbi c\u00e1c s\u1ed1 li\u1ec7u \u0111o ban \u0111\u1ea7u t\u1eeb qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh th\u1eed.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"part-3-pre-shift-structural-inspection-checklist\">Ph\u1ea7n 3: Danh s\u00e1ch ki\u1ec3m tra c\u1ea5u tr\u00fac tr\u01b0\u1edbc ca l\u00e0m vi\u1ec7c<\/h2>\n\n\n\n<p>Ch\u1ec9 c\u1ea7n 5 ph\u00fat quan s\u00e1t tr\u1ef1c quan l\u00e0 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u1ea5u tr\u00fac tr\u01b0\u1edbc khi ch\u00fang tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng:<\/p>\n\n\n\n<ul>\n<li><strong>D\u1ea7m ch\u00ednh:<\/strong> H\u00e3y t\u00ecm ki\u1ebfm c\u00e1c v\u1ebft n\u1ee9t s\u01a1n m\u1edbi ho\u1eb7c v\u1ebft r\u1ec9 s\u00e9t \u2014 th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u \u0111\u1ea7u ti\u00ean c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u1ee7a v\u1ebft n\u1ee9t do m\u1ecfi \u0111ang ph\u00e1t tri\u1ec3n.<\/li>\n\n\n\n<li><strong>Gi\u00e1 \u0111\u1ee1 cu\u1ed1i\/xe \u0111\u1ea9y cu\u1ed1i:<\/strong> Ki\u1ec3m tra c\u00e1c m\u1ed1i n\u1ed1i bu l\u00f4ng. C\u00f3 bu l\u00f4ng n\u00e0o b\u1ecb l\u1ecfng ho\u1eb7c thi\u1ebfu kh\u00f4ng?<\/li>\n\n\n\n<li><strong>C\u00e1c m\u1ed1i n\u1ed1i gh\u00e9p:<\/strong> D\u00f9ng \u0111\u00e8n pin soi d\u1ecdc theo c\u00e1c m\u1ed1i h\u00e0n n\u1ed1i d\u1ea7m. Ki\u1ec3m tra xem c\u00f3 v\u1ebft s\u01a1n n\u1ee9t, r\u1ec9 s\u00e9t ch\u1ea3y ra t\u1eeb c\u00e1c m\u1ed1i h\u00e0n hay kh\u00f4ng.<\/li>\n\n\n\n<li><strong>C\u00e1c \u0111\u1ea7u n\u1ed1i m\u00e0ng ng\u0103n\/thanh gia c\u01b0\u1eddng:<\/strong> \u0110\u00e2y l\u00e0 nh\u1eefng \u0111i\u1ec3m kh\u1edfi ph\u00e1t v\u1ebft n\u1ee9t do m\u1ecfi \u0111i\u1ec3n h\u00ecnh \u2014 h\u00e3y quan s\u00e1t k\u1ef9.<\/li>\n\n\n\n<li><strong>C\u00e1c k\u1eb9p ray v\u00e0 m\u1ed1i n\u1ed1i ray:<\/strong> C\u00e1c k\u1eb9p b\u1ecb l\u1ecfng ho\u1eb7c g\u00e3y g\u00e2y ra t\u1ea3i tr\u1ecdng va \u0111\u1eadp l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 m\u1ecfi k\u1ebft c\u1ea5u.<\/li>\n\n\n\n<li><strong>\u0110\u01b0\u1eddng ray xe \u0111i\u1ec7n tr\u00ean d\u1ea7m:<\/strong> Ki\u1ec3m tra \u0111\u1ed9 l\u1ec7ch ho\u1eb7c khe h\u1edf c\u1ee7a ray - \u0111i\u1ec1u n\u00e0y g\u00e2y ra t\u1ea3i tr\u1ecdng kh\u00f4ng \u0111\u1ec1u l\u00ean b\u1ea3n b\u1ee5ng d\u1ea7m.<\/li>\n\n\n\n<li><strong>\u0102n m\u00f2n:<\/strong> \u0110\u1eb7c bi\u1ec7t l\u00e0 t\u1ea1i \u0111i\u1ec3m n\u1ed1i gi\u1eefa m\u1eb7t b\u00edch d\u01b0\u1edbi v\u00e0 th\u00e2n d\u1ea7m \u1edf c\u00e1c c\u1ea7n c\u1ea9u ho\u1ea1t \u0111\u1ed9ng ngo\u00e0i tr\u1eddi ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt.<\/li>\n\n\n\n<li><strong>C\u00e1c \u0111i\u1ec3m treo\/ch\u1ed1t c\u00e2n b\u1eb1ng:<\/strong> Tr\u00ean c\u1ea7n c\u1ea9u di \u0111\u1ed9ng tr\u00ean cao, c\u00e1c ch\u1ed1t b\u1ecb m\u00f2n t\u1ea1o ra t\u1ea3i tr\u1ecdng va \u0111\u1eadp t\u00e1c \u0111\u1ed9ng ng\u01b0\u1ee3c tr\u1edf l\u1ea1i c\u1ea5u tr\u00fac.<\/li>\n\n\n\n<li><strong>D\u1ea7m \u0111\u01b0\u1eddng b\u0103ng v\u00e0 c\u1ed9t \u0111\u1ee1:<\/strong> \u0110\u1ed9 ch\u1eafc ch\u1eafn c\u1ee7a c\u1ea7n c\u1ea9u ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 ch\u1eafc ch\u1eafn c\u1ee7a b\u1ec7 \u0111\u1ee1.<\/li>\n\n\n\n<li><strong>B\u1ea5t k\u1ef3 s\u1ef1 bi\u1ebfn d\u1ea1ng ho\u1eb7c h\u01b0 h\u1ecfng do va \u0111\u1eadp n\u00e0o:<\/strong> C\u00e1c v\u1ebft l\u00f5m do va ch\u1ea1m t\u1ea1o ra c\u00e1c \u0111i\u1ec3m t\u1eadp trung \u1ee9ng su\u1ea5t.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quick-reference-structural-repair-decision-matrix\">H\u01b0\u1edbng d\u1eabn tham kh\u1ea3o nhanh: Ma tr\u1eadn quy\u1ebft \u0111\u1ecbnh s\u1eeda ch\u1eefa k\u1ebft c\u1ea5u<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>T\u00ecm ki\u1ebfm<\/th><th>Ho\u1ea1t \u0111\u1ed9ng<\/th><\/tr><\/thead><tbody><tr><td>V\u1ebft n\u1ee9t s\u01a1n n\u00f4ng, kh\u00f4ng r\u1ec9 s\u00e9t, ki\u1ec3m tra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p PT kh\u00f4ng cho th\u1ea5y v\u1ebft n\u1ee9t tr\u00ean kim lo\u1ea1i n\u1ec1n.<\/td><td>Theo d\u00f5i t\u1ea1i l\u1ea7n ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 ti\u1ebfp theo.<\/td><\/tr><tr><td>\u0110\u00e3 x\u00e1c nh\u1eadn v\u1ebft n\u1ee9t do m\u1ecfi c\u00f3 k\u00edch th\u01b0\u1edbc &lt; 50 mm tr\u00ean c\u1ea5u ki\u1ec7n ph\u1ee5 (v\u00e1ch ng\u0103n, thanh gia c\u01b0\u1eddng).<\/td><td>D\u1eebng khoan, kho\u00e9t r\u00e3nh, s\u1eeda ch\u1eefa m\u1ed1i h\u00e0n theo WPS \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n<\/td><\/tr><tr><td>\u0110\u00e3 x\u00e1c nh\u1eadn c\u00f3 v\u1ebft n\u1ee9t &gt; 50 mm ho\u1eb7c tr\u00ean c\u1ea5u ki\u1ec7n ch\u00ednh (m\u1eb7t b\u00edch\/th\u00e2n d\u1ea7m, \u0111\u1ea7u d\u1ea7m)<\/td><td>C\u1ea7n c\u00f3 \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt; c\u00f3 th\u1ec3 c\u1ea7n t\u1ea5m gia c\u01b0\u1eddng; b\u1eaft bu\u1ed9c ph\u1ea3i th\u1ef1c hi\u1ec7n ki\u1ec3m tra t\u1ea3i tr\u1ecdng sau s\u1eeda ch\u1eefa.<\/td><\/tr><tr><td>Hi\u1ec7n t\u01b0\u1ee3ng u\u1ed1n cong c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u1edf b\u1ea3n b\u1ee5ng (s\u00f3ng &gt; 3 mm l\u1ec7ch kh\u1ecfi m\u1eb7t ph\u1eb3ng tr\u00ean nh\u1ecbp 500 mm)<\/td><td>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed1t n\u00f3ng; \u0111i\u1ec1u tra nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 (qu\u00e1 t\u1ea3i? thi\u1ebft k\u1ebf?)<\/td><\/tr><tr><td>\u0110\u1ed9 v\u00f5ng xu\u1ed1ng v\u0129nh vi\u1ec5n c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c (&gt; L\/1000 so v\u1edbi \u0111\u1ed9 cong ban \u0111\u1ea7u)<\/td><td>C\u1ea7n s\u1eeda ch\u1eefa l\u1edbn; gia c\u1ed1 ho\u1eb7c t\u0103ng c\u01b0\u1eddng \u1ee9ng su\u1ea5t tr\u01b0\u1edbc; c\u00f3 th\u1ec3 c\u1ea7n \u0111\u00e1nh gi\u00e1 l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a k\u1ebft c\u1ea5u.<\/td><\/tr><tr><td>Nhi\u1ec1u v\u1ebft n\u1ee9t trong c\u00f9ng m\u1ed9t v\u00f9ng d\u1ea7m, ho\u1eb7c v\u1ebft n\u1ee9t lan v\u00e0o kim lo\u1ea1i n\u1ec1n v\u01b0\u1ee3t qu\u00e1 m\u1ed1i h\u00e0n.<\/td><td><strong>Thay th\u1ebf ph\u1ea7n d\u1ea7m<\/strong> \u2014 C\u00e1c h\u01b0 h\u1ecfng do m\u1ecfi r\u1ea3i r\u00e1c cho th\u1ea5y chi ti\u1ebft \u0111\u00e3 h\u1ebft tu\u1ed5i th\u1ecd.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-prevent-overhead-crane-structural-failures\">C\u00e1ch ph\u00f2ng ng\u1eeba h\u01b0 h\u1ecfng k\u1ebft c\u1ea5u c\u1ea7n c\u1ea9u tr\u00ean cao<\/h2>\n\n\n\n<p>Ph\u00f2ng ng\u1eeba c\u00e1c s\u1ef1 c\u1ed1 h\u01b0 h\u1ecfng k\u1ebft c\u1ea5u c\u1ee7a c\u1ea7n c\u1ea9u tr\u00ean cao ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi vi\u1ec7c s\u1eeda ch\u1eefa k\u1ebft c\u1ea5u l\u1edbn ho\u1eb7c thay th\u1ebf d\u1ea7m. H\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 k\u1ebft c\u1ea5u ph\u00e1t sinh d\u1ea7n d\u1ea7n v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t th\u00f4ng qua v\u1eadn h\u00e0nh \u0111\u00fang c\u00e1ch, ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"avoid-overloading\">Tr\u00e1nh qu\u00e1 t\u1ea3i<\/h3>\n\n\n\n<p>Chu k\u1ef3 qu\u00e1 t\u1ea3i l\u1eb7p \u0111i l\u1eb7p l\u1ea1i l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u g\u00e2y ra <strong>v\u1ebft n\u1ee9t m\u1ecfi d\u1ea7m c\u1ea7u tr\u1ee5c<\/strong> v\u00e0 bi\u1ebfn d\u1ea1ng v\u0129nh vi\u1ec5n. Lu\u00f4n \u0111\u1ea3m b\u1ea3o t\u1ea3i tr\u1ecdng n\u00e2ng th\u1ef1c t\u1ebf n\u1eb1m trong gi\u1edbi h\u1ea1n t\u1ea3i tr\u1ecdng \u0111\u1ecbnh m\u1ee9c v\u00e0 ph\u00e2n lo\u1ea1i nhi\u1ec7m v\u1ee5 c\u1ee7a c\u1ea7n c\u1ea9u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"conduct-scheduled-structural-inspections\">Ti\u1ebfn h\u00e0nh ki\u1ec3m tra c\u1ea5u tr\u00fac \u0111\u1ecbnh k\u1ef3.<\/h3>\n\n\n\n<p>L\u1ecbch tr\u00ecnh <strong>Ki\u1ec3m tra c\u1ea7n c\u1ea9u tr\u00ean cao<\/strong> C\u00e1c ch\u01b0\u01a1ng tr\u00ecnh n\u00ean bao g\u1ed3m ki\u1ec3m tra tr\u1ef1c quan, ki\u1ec3m tra m\u1ed1i h\u00e0n, x\u00e1c minh \u0111\u1ed9 th\u1eb3ng h\u00e0ng c\u1ee7a \u0111\u01b0\u1eddng ray v\u00e0 ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y \u0111\u1ecbnh k\u1ef3 (NDT). C\u00e1c v\u1ebft n\u1ee9t do m\u1ecfi th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n r\u1ea5t l\u00e2u tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh nh\u1eefng h\u01b0 h\u1ecfng c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"maintain-proper-rail-alignment\">\u0110\u1ea3m b\u1ea3o \u0111\u01b0\u1eddng ray th\u1eb3ng h\u00e0ng<\/h3>\n\n\n\n<p>Vi\u1ec7c c\u0103n ch\u1ec9nh \u0111\u01b0\u1eddng ray kh\u00f4ng \u0111\u00fang c\u00e1ch t\u1ea1o ra t\u1ea3i tr\u1ecdng b\u00e1nh xe kh\u00f4ng \u0111\u1ed1i x\u1ee9ng, l\u00e0m t\u0103ng s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t trong b\u1ea3n b\u1ee5ng d\u1ea7m v\u00e0 c\u00e1c m\u1ed1i n\u1ed1i \u0111\u1ea7u toa xe.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"monitor-thermal-effects\">Theo d\u00f5i hi\u1ec7u \u1ee9ng nhi\u1ec7t<\/h3>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u1ea7n c\u1ea9u trong x\u01b0\u1edfng \u0111\u00fac v\u00e0 c\u1ea7n c\u1ea9u g\u00e1o m\u00fac kim lo\u1ea1i n\u00f3ng ch\u1ea3y, nhi\u1ec7t b\u1ee9c x\u1ea1 c\u00f3 th\u1ec3 \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh xu\u1ed1ng c\u1ea5p v\u1eadt li\u1ec7u v\u00e0 g\u00e2y bi\u1ebfn d\u1ea1ng c\u1ea5u tr\u00fac. T\u1ea5m ch\u1eafn nhi\u1ec7t v\u00e0 thi\u1ebft k\u1ebf ch\u1ecbu nhi\u1ec7t c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 th\u01b0\u1eddng xuy\u00ean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"repair-minor-defects-early\">S\u1eeda ch\u1eefa c\u00e1c l\u1ed7i nh\u1ecf s\u1edbm<\/h3>\n\n\n\n<p>Nh\u1eefng v\u1ebft n\u1ee9t nh\u1ecf tr\u00ean l\u1edbp s\u01a1n, hi\u1ec7n t\u01b0\u1ee3ng r\u1ec9 s\u00e9t lan r\u1ed9ng v\u00e0 c\u00e1c khuy\u1ebft t\u1eadt c\u1ee5c b\u1ed9 trong m\u1ed1i h\u00e0n c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng h\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng v\u1ec1 c\u1ea5u tr\u00fac c\u1ea7n c\u1ea9u n\u1ebfu b\u1ecb b\u1ecf qua. Can thi\u1ec7p s\u1edbm s\u1ebd gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed s\u1eeda ch\u1eefa d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"need-expert-support\">C\u1ea7n h\u1ed7 tr\u1ee3 chuy\u00ean gia?<\/h2>\n\n\n\n<p><strong>C\u1ea7n c\u1ea9u Kuangshan<\/strong> C\u00f4ng ty ch\u00fang t\u00f4i thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t k\u1ebft c\u1ea5u th\u00e9p cho c\u1ea7n c\u1ea9u tr\u00ean cao, c\u1ea7n c\u1ea9u gi\u00e0n v\u00e0 c\u1ea7n c\u1ea9u c\u1ea7n tr\u1ee5c \u2014 t\u1eeb d\u1ea7m h\u1ed9p \u0111\u1ebfn b\u1ed9 c\u1ea7n c\u1ea9u ho\u00e0n ch\u1ec9nh. N\u1ebfu c\u1ea7n c\u1ea9u c\u1ee7a b\u1ea1n \u0111ang g\u1eb7p ph\u1ea3i t\u00ecnh tr\u1ea1ng xu\u1ed1ng c\u1ea5p k\u1ebft c\u1ea5u, \u0111\u1ed9i ng\u0169 k\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u01b0 h\u1ea1i, \u0111\u1ec1 xu\u1ea5t s\u1eeda ch\u1eefa ho\u1eb7c ch\u1ebf t\u1ea1o d\u1ea7m thay th\u1ebf theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ban \u0111\u1ea7u ho\u1eb7c \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p.<\/p>\n\n\n\n<p><em>H\u01b0\u1edbng d\u1eabn n\u00e0y ch\u1ec9 mang t\u00ednh ch\u1ea5t th\u00f4ng tin. Vi\u1ec7c s\u1eeda ch\u1eefa k\u1ebft c\u1ea5u d\u1ea7m c\u1ea7u tr\u1ee5c ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u01b0\u1edbi s\u1ef1 gi\u00e1m s\u00e1t c\u1ee7a k\u1ef9 s\u01b0 c\u00f3 tr\u00ecnh \u0111\u1ed9 chuy\u00ean m\u00f4n, tu\u00e2n theo CMAA 70\/74, EN 13001, ASME B30.2 v\u00e0 c\u00e1c quy \u0111\u1ecbnh \u0111\u1ecba ph\u01b0\u01a1ng hi\u1ec7n h\u00e0nh. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c h\u00e0n tr\u00ean k\u1ebft c\u1ea5u c\u1ea7u tr\u1ee5c n\u1ebfu kh\u00f4ng c\u00f3 quy tr\u00ecnh h\u00e0n (WPS) \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t v\u00e0 th\u1ee3 h\u00e0n c\u00f3 tr\u00ecnh \u0111\u1ed9 chuy\u00ean m\u00f4n.<\/em><\/p>","protected":false},"excerpt":{"rendered":"A failed brake can be replaced. A damaged gearbox can be rebuilt. But when the steel structure itself begins to crack, deform, or permanently sag, the consequences are far more serious. Overhead crane structural failures are among the most dangerous and costly problems in industrial lifting systems. Structural damage can reduce load-bearing capacity, create alignment [&hellip;]","protected":false},"featured_media":11543,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[189],"posts_tag":[767],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/xmxposts\/11542"}],"collection":[{"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":6,"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/xmxposts\/11542\/revisions"}],"predecessor-version":[{"id":11557,"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/xmxposts\/11542\/revisions\/11557"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/media\/11543"}],"wp:attachment":[{"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/media?parent=11542"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/posts_category?post=11542"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/vi\/wp-json\/wp\/v2\/posts_tag?post=11542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}