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Larsen steel sheet pile cofferdam construction method for underwater deep riprap layer area
The invention discloses a Larsen steel sheet pile cofferdam construction method for an underwater deep riprap layer area. The method includes the steps that (1) a construction platform is filled; (2) grooves are hooked and shallow barriers are removed; (3) groove body parts are backfilled; (4) Larsen steel sheet piles are driven by adopting a pile driving and pulling machine; (5) when the Larsen steel sheet piles encounter a deep obstacle in the driving process, advanced hole guiding is conducted on the position where the obstacle is located through a spiral drill rod, and the obstacle is extruded to the periphery of the axis of the Larsen steel sheet piles; (6) after the spiral drill rod is detached and a hydraulic power head is replaced by a hydraulic clamp, the Larsen steel sheet piles are driven again until the Larsen steel sheet piles are driven to a designed pile bottom elevation; and (7) the steps (4)-(6) are repeatedly conducted to finish cofferdam construction. By the adoption of the Larsen steel sheet pile cofferdam construction method for the underwater deep riprap layer area, underwater deep riprap cleaning operation can be efficiently carried out, the waiting time of the steel sheet pile driving and pulling machine when encountering the underground obstacles is greatly shortened, the construction efficiency is improved, and the seepage-proofing and water-stopping effects of a steel sheet pile cofferdam are guaranteed.
一种用于水下深厚抛石层区域的拉森钢板桩围堰施工方法，包括以下步骤：1）填筑施工平台；2）勾槽并清除浅层障碍物；3）对槽体部分进行回填；4）采用打拔桩机进行拉森钢板桩的施打；5）在拉森钢板桩的施打过程中遇到深层障碍物时，利用螺旋钻杆对障碍物所在位置进行超前引孔，挤压障碍物至拉森钢板桩轴线外围；6）卸下螺旋钻杆并更换液压动力头为液压钳后，再次进行拉森钢板桩的施打作业，直至拉森钢板桩施打至设计桩底标高；7）重复上述步骤4）‑6），完成围堰施工作业。本发明采用上述方法，能够高效进行水下深厚抛石清理作业，极大程度地减少钢板桩打拔桩机遇地下障碍物等待时间，提高施工效率，保证钢板桩围堰防渗止水效果。
Larsen steel sheet pile cofferdam construction method for underwater deep riprap layer area
The invention discloses a Larsen steel sheet pile cofferdam construction method for an underwater deep riprap layer area. The method includes the steps that (1) a construction platform is filled; (2) grooves are hooked and shallow barriers are removed; (3) groove body parts are backfilled; (4) Larsen steel sheet piles are driven by adopting a pile driving and pulling machine; (5) when the Larsen steel sheet piles encounter a deep obstacle in the driving process, advanced hole guiding is conducted on the position where the obstacle is located through a spiral drill rod, and the obstacle is extruded to the periphery of the axis of the Larsen steel sheet piles; (6) after the spiral drill rod is detached and a hydraulic power head is replaced by a hydraulic clamp, the Larsen steel sheet piles are driven again until the Larsen steel sheet piles are driven to a designed pile bottom elevation; and (7) the steps (4)-(6) are repeatedly conducted to finish cofferdam construction. By the adoption of the Larsen steel sheet pile cofferdam construction method for the underwater deep riprap layer area, underwater deep riprap cleaning operation can be efficiently carried out, the waiting time of the steel sheet pile driving and pulling machine when encountering the underground obstacles is greatly shortened, the construction efficiency is improved, and the seepage-proofing and water-stopping effects of a steel sheet pile cofferdam are guaranteed.
一种用于水下深厚抛石层区域的拉森钢板桩围堰施工方法，包括以下步骤：1）填筑施工平台；2）勾槽并清除浅层障碍物；3）对槽体部分进行回填；4）采用打拔桩机进行拉森钢板桩的施打；5）在拉森钢板桩的施打过程中遇到深层障碍物时，利用螺旋钻杆对障碍物所在位置进行超前引孔，挤压障碍物至拉森钢板桩轴线外围；6）卸下螺旋钻杆并更换液压动力头为液压钳后，再次进行拉森钢板桩的施打作业，直至拉森钢板桩施打至设计桩底标高；7）重复上述步骤4）‑6），完成围堰施工作业。本发明采用上述方法，能够高效进行水下深厚抛石清理作业，极大程度地减少钢板桩打拔桩机遇地下障碍物等待时间，提高施工效率，保证钢板桩围堰防渗止水效果。
Larsen steel sheet pile cofferdam construction method for underwater deep riprap layer area
用于水下深厚抛石层区域的拉森钢板桩围堰施工方法
CHEN JIAPEI (author) / REN LEI (author) / GUO JIUCHUN (author) / YUAN MIN (author) / WANG LIANG (author) / TANG LI (author) / XIANG JI (author) / HAN DONG (author) / ZHOU RONGLI (author)
2021-09-03
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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