斜-直交替支护桩在水利基坑工程中的首次应用

The First Application of Inclined-Straight Alternate Retaining Pile in Foundation Pit of Water Conservancy Project

斜-直交替支护桩具有高自稳性和强自撑性,已在工业与民用建筑的基坑工程中推广使用,但尚未用于水利工程中。本文针对水利工程项目的工程实例,结合天津软土地区某穿堤闸涵基坑工程,通过拉森钢板桩抗滑加矩形支护桩斜-直交替施工的方法,结合理论计算结果优化倾斜桩的布置及支护结构设计,在水利工程的首次应用并取得了良好效果,确保了环境的安全,保障了施工进度,可为类似的水利工程的设计和施工提供参考。

The inclined-straight alternate support system of foundation pit has high self-stability and strong self-support,which has been popularized in industrial and civil foundation pit engineering,but has not been used in water conservancy engineering.Based on the engineering cases of water conservancy project,combined with a wear dam sluice culvert foundation pit in soft soil area of Tianjin,the Larsen steel sheet pile with rectangular retaining piles against sliding and straight alternate construction method is used.Combined with the theoretical calculation results,the inclined pile arrangement and the supporting structure design are optimized and applied in water conservancy engineering for the first time,which achieved good results,ensured the safety of the environment,and guaranteed the construction progress.It can provide a reference for the design and construction of similar projects in water conservancy projects.