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Construction method of deep large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam
A deep and thick large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam construction method comprises the steps that according to the diameters of lock catch steel pipe piles at the four corners, the position of a C-O-shaped lock catch of each lock catch steel pipe pile is determined, hole guiding is conducted, and the hole guiding depth is the inserting and driving design elevation of the lock catch steel pipe piles; inserting and driving lock catch steel pipe piles after hole guiding of the single-side lock catch area is completed, inserting and driving the lock catch steel pipe piles at the two corners, close to the upstream side, of the foundation pit, and welding a guide frame ox horn and a guide frame after inserting and driving are in place; a limiting structure is arranged on the guide frame, during inserting and driving, the pile backs of the lock catch steel pipe piles abut against the guide frame, and the lock catch steel pipe piles are slowly put down through lifting equipment while inserting is conducted; and after the lock catch steel pipe piles are closed, foundation pit excavation is conducted, after excavation reaches the specified elevation, enclosing purlin supporting welding is conducted, after enclosing purlin construction is completed, excavation continues to be conducted till the bottom elevation of bottom sealing concrete is reached, and after cleaning is conducted till the bottom elevation of the bottom sealing concrete is reached, concrete pouring cofferdam bottom sealing is conducted. The invention has the advantages of cost saving, high overall stability and good safety performance.
一种深厚大粒径砂卵石覆盖层河床锁扣钢管桩围堰施工方法，根据四角位置的锁扣钢管桩的直径，确定每根锁扣钢管桩的C‑O型锁扣所在位置并进行引孔，引孔深度为锁扣钢管桩的插打设计高程；待单边锁扣区域引孔完毕后插打锁扣钢管桩，先将基坑靠上游侧的两角插打锁扣钢管桩，插打到位后，进行导向架牛角和导向架焊接；在导向架上设置限位结构，插打时，锁扣钢管桩的桩背紧靠导向架，边插边通过起吊设备将锁扣钢管桩缓慢下放；当锁扣钢管桩合拢后进行基坑开挖，当开挖至指定标高后，进行围檩支撑焊接，围檩施工完毕后，继续开挖至封底混凝土底标高，清理至封底混凝土底标高后，进行混凝土浇筑围堰封底。本发明节约成本，整体稳定性高，安全性能好。
Construction method of deep large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam
A deep and thick large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam construction method comprises the steps that according to the diameters of lock catch steel pipe piles at the four corners, the position of a C-O-shaped lock catch of each lock catch steel pipe pile is determined, hole guiding is conducted, and the hole guiding depth is the inserting and driving design elevation of the lock catch steel pipe piles; inserting and driving lock catch steel pipe piles after hole guiding of the single-side lock catch area is completed, inserting and driving the lock catch steel pipe piles at the two corners, close to the upstream side, of the foundation pit, and welding a guide frame ox horn and a guide frame after inserting and driving are in place; a limiting structure is arranged on the guide frame, during inserting and driving, the pile backs of the lock catch steel pipe piles abut against the guide frame, and the lock catch steel pipe piles are slowly put down through lifting equipment while inserting is conducted; and after the lock catch steel pipe piles are closed, foundation pit excavation is conducted, after excavation reaches the specified elevation, enclosing purlin supporting welding is conducted, after enclosing purlin construction is completed, excavation continues to be conducted till the bottom elevation of bottom sealing concrete is reached, and after cleaning is conducted till the bottom elevation of the bottom sealing concrete is reached, concrete pouring cofferdam bottom sealing is conducted. The invention has the advantages of cost saving, high overall stability and good safety performance.
一种深厚大粒径砂卵石覆盖层河床锁扣钢管桩围堰施工方法，根据四角位置的锁扣钢管桩的直径，确定每根锁扣钢管桩的C‑O型锁扣所在位置并进行引孔，引孔深度为锁扣钢管桩的插打设计高程；待单边锁扣区域引孔完毕后插打锁扣钢管桩，先将基坑靠上游侧的两角插打锁扣钢管桩，插打到位后，进行导向架牛角和导向架焊接；在导向架上设置限位结构，插打时，锁扣钢管桩的桩背紧靠导向架，边插边通过起吊设备将锁扣钢管桩缓慢下放；当锁扣钢管桩合拢后进行基坑开挖，当开挖至指定标高后，进行围檩支撑焊接，围檩施工完毕后，继续开挖至封底混凝土底标高，清理至封底混凝土底标高后，进行混凝土浇筑围堰封底。本发明节约成本，整体稳定性高，安全性能好。
Construction method of deep large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam
一种深厚大粒径砂卵石覆盖层河床锁扣钢管桩围堰施工方法
LIU YANAN (author) / SONG ZUODONG (author) / WEI YONGNENG (author) / YAN JUN (author)
2023-05-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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