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A platform for research: civil engineering, architecture and urbanism
Construction method for removing cast-in-place piles in shield crossing area under viaduct
The invention relates to the technical field of cast-in-place pile removal, and discloses a construction method for removing cast-in-place piles in a shield crossing area under a viaduct, which comprises the following steps of: placing a crawler-type full-casing full-slewing drilling machine in place, hoisting a casing by using a low-lying short-arm crawler crane, and rotating the casing to downwards cut until the casing surrounds the periphery of an old pile bearing platform; hoisting a micro wedge-shaped drill hammer, embedding the micro wedge-shaped drill hammer between the old pile bearing platform and the inner side wall of the sleeve, driving the sleeve to rotate until the old pile bearing platform is twisted off, and taking out the old pile bearing platform; the sleeve is driven to continuously press and cut the soil layer until the lower portion of the sleeve surrounds the upper portion of the old pile; the micro wedge-shaped drill hammer is embedded between the old pile and the inner side wall of the sleeve, the sleeve is driven to rotate till the insertion section is twisted off, and the insertion section is taken out; the steps are repeated until the length of the residual pile section is smaller than the set length, and the residual pile section is crushed and the hole is cleaned through a miniature cross-shaped punch hammer; and backfilling the cement mortar, and pulling the sleeve.
本发明涉及灌注桩清除的技术领域，公开了高架桥下盾构穿越区灌注桩清除施工方法，履带式全套管全回转钻机就位，利用低趴短臂履带吊吊装套管，套管回转朝下切削至环抱在旧桩承台的外周；吊装微型楔形钎锤，微型楔形钎锤嵌入至旧桩承台与套管内侧壁之间中，驱动套管回转，直至旧桩承台被扭断，将旧桩承台取出；驱动套管继续下压切削土层，直至套管的下部环抱在旧桩的上部上；微型楔形钎锤嵌入至旧桩与套管内侧壁之间，驱动套管回转，直至插入段被扭断，将插入段取出；重复上述步骤，直至残桩段的长度小于设定长度，利用微型十字冲锤将残桩段破碎，清孔；回填水泥砂浆，起拔套管。
Construction method for removing cast-in-place piles in shield crossing area under viaduct
The invention relates to the technical field of cast-in-place pile removal, and discloses a construction method for removing cast-in-place piles in a shield crossing area under a viaduct, which comprises the following steps of: placing a crawler-type full-casing full-slewing drilling machine in place, hoisting a casing by using a low-lying short-arm crawler crane, and rotating the casing to downwards cut until the casing surrounds the periphery of an old pile bearing platform; hoisting a micro wedge-shaped drill hammer, embedding the micro wedge-shaped drill hammer between the old pile bearing platform and the inner side wall of the sleeve, driving the sleeve to rotate until the old pile bearing platform is twisted off, and taking out the old pile bearing platform; the sleeve is driven to continuously press and cut the soil layer until the lower portion of the sleeve surrounds the upper portion of the old pile; the micro wedge-shaped drill hammer is embedded between the old pile and the inner side wall of the sleeve, the sleeve is driven to rotate till the insertion section is twisted off, and the insertion section is taken out; the steps are repeated until the length of the residual pile section is smaller than the set length, and the residual pile section is crushed and the hole is cleaned through a miniature cross-shaped punch hammer; and backfilling the cement mortar, and pulling the sleeve.
本发明涉及灌注桩清除的技术领域，公开了高架桥下盾构穿越区灌注桩清除施工方法，履带式全套管全回转钻机就位，利用低趴短臂履带吊吊装套管，套管回转朝下切削至环抱在旧桩承台的外周；吊装微型楔形钎锤，微型楔形钎锤嵌入至旧桩承台与套管内侧壁之间中，驱动套管回转，直至旧桩承台被扭断，将旧桩承台取出；驱动套管继续下压切削土层，直至套管的下部环抱在旧桩的上部上；微型楔形钎锤嵌入至旧桩与套管内侧壁之间，驱动套管回转，直至插入段被扭断，将插入段取出；重复上述步骤，直至残桩段的长度小于设定长度，利用微型十字冲锤将残桩段破碎，清孔；回填水泥砂浆，起拔套管。
Construction method for removing cast-in-place piles in shield crossing area under viaduct
高架桥下盾构穿越区灌注桩清除施工方法
LIANG YAOXIANG (author) / LI XINLIN (author) / GAO FEIPENG (author) / LEI BIN (author) / QIAN CHANG (author) / TONG XIN (author) / HONG SHENGNAN (author) / XIA ZHENTAO (author) / WU XIWEN (author) / MENG ZEXIANG (author)
2024-12-06
Patent
Electronic Resource
Chinese
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