邻河区深基坑支护桩设计与施工优化

DESIGN AND CONSTRUCTION OPTIMIZATION OF SUPPORTING PILE FOR DEEP FOUNDATION PIT IN LINHE DISTRICT

针对龙泉市城市文化客厅项目1号地块邻河,地下水位高,最高时为正负零下2 m。1号地块基坑支护原施工方案为地下连续墙,后经优化采用悬壁桩(咬合桩)局部锚索施工。邻河位置使用双排桩方案,其他位置采用放坡土钉墙+悬臂桩支护方案,现场施工中根据工况取不同支护方式,最终达到基坑支护安全支护及止水效果满足施工要求、节约成本。为今后在邻河区深基坑支护桩设计与施工提供借鉴经验。

For the NO.1 plot of the Longquan City Cultural Living Room Project,which is close to the river,the groundwater level is high,and the highest is plus or minus minus 2 m.The original construction plan of the foundation pit support of the NO.1 plot is the underground diaphragm wall,and then the local anchor cable construction of the cantilever pile(occlusal pile)is used after optimization.The double-row pile scheme is used for the location near the river,and the grading soil nail wall+cantilever pile support scheme is used for other positions.During the on-site construction,different support methods are adopted according to the working conditions,and finally the safe support and water-stop effect of foundation pit support can be achieved to meet the construction requirements.requirements and cost savings.It provides reference experience for the design and construction of supporting piles for deep foundation pits in Linhe District in the future.