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Steel sheet pile cofferdam construction method
The steel sheet pile cofferdam construction method comprises the steps that guide holes are constructed, sleeves are arranged outside the guide holes, the adjacent guide holes are engaged with each other, and a closed area is defined by the multiple sets of guide holes; the guide hole is backfilled with sandy soil, the sleeve is gradually pulled out in the sandy soil backfilling process, and after the sandy soil is backfilled to the bottom elevation of the riverbed, the sleeve is completely pulled out; the steel sheet piles are sunk into the backfilled sandy soil, grouting reinforcement is conducted on the backfilled sandy soil, and a cofferdam is defined by the multiple sets of steel sheet piles; the cofferdam is pumped, and a foundation pit is excavated in the cofferdam. According to the steel sheet pile cofferdam construction method, it is guaranteed that the steel sheet piles smoothly sink into the bedrock by means of the backfilled sandy soil, collapse of the pebble bed is prevented, the water stopping effect of the steel sheet pile cofferdam is improved through grouting, the construction risk is reduced, the design target is achieved, and remarkable social benefits and economic benefits are obtained.
本发明公开了一种钢板桩围堰施工方法，施工出引孔，引孔外设有套管，且相邻引孔之间相互咬合，多组引孔围成封闭区域；向引孔内回填砂土，并在回填砂土过程中逐渐拔出套管，砂土回填至河床底标高后，套管完全拔出；将钢板桩施沉到回填砂土内，注浆加固回填砂土，多组钢板桩围成围堰；对围堰进行抽水，在围堰内开挖基坑。上述钢板桩围堰施工方法，利用了回填砂土保证钢板桩顺利施沉进入基岩，防止卵石层垮塌，并通过注浆提高钢板桩围堰止水效果，减小了施工风险，达到了设计目标，取得了显著的社会效益和经济效益。
Steel sheet pile cofferdam construction method
The steel sheet pile cofferdam construction method comprises the steps that guide holes are constructed, sleeves are arranged outside the guide holes, the adjacent guide holes are engaged with each other, and a closed area is defined by the multiple sets of guide holes; the guide hole is backfilled with sandy soil, the sleeve is gradually pulled out in the sandy soil backfilling process, and after the sandy soil is backfilled to the bottom elevation of the riverbed, the sleeve is completely pulled out; the steel sheet piles are sunk into the backfilled sandy soil, grouting reinforcement is conducted on the backfilled sandy soil, and a cofferdam is defined by the multiple sets of steel sheet piles; the cofferdam is pumped, and a foundation pit is excavated in the cofferdam. According to the steel sheet pile cofferdam construction method, it is guaranteed that the steel sheet piles smoothly sink into the bedrock by means of the backfilled sandy soil, collapse of the pebble bed is prevented, the water stopping effect of the steel sheet pile cofferdam is improved through grouting, the construction risk is reduced, the design target is achieved, and remarkable social benefits and economic benefits are obtained.
本发明公开了一种钢板桩围堰施工方法，施工出引孔，引孔外设有套管，且相邻引孔之间相互咬合，多组引孔围成封闭区域；向引孔内回填砂土，并在回填砂土过程中逐渐拔出套管，砂土回填至河床底标高后，套管完全拔出；将钢板桩施沉到回填砂土内，注浆加固回填砂土，多组钢板桩围成围堰；对围堰进行抽水，在围堰内开挖基坑。上述钢板桩围堰施工方法，利用了回填砂土保证钢板桩顺利施沉进入基岩，防止卵石层垮塌，并通过注浆提高钢板桩围堰止水效果，减小了施工风险，达到了设计目标，取得了显著的社会效益和经济效益。
Steel sheet pile cofferdam construction method
钢板桩围堰施工方法
TANG DONGLIANG (author) / WANG PENG (author) / HUANG ZUQI (author) / HE ZHIJUN (author) / YANG SHENG (author) / HU YANGYANG (author) / ZHANG DINGCHUAN (author) / WANG KAI (author) / CHEN CHONG (author) / ZHANG QILONG (author)
2022-05-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen