某钢厂热轧带钢漩流池圆形基坑监测分析

Analysis of Monitoring Data of a Circular Whirlpool Foundation Pit

根据某钢厂一个圆形深基坑工程的监测实例,对圆形基坑开挖过程中地下连续墙侧向位移、土压力、孔隙水压力、地下连续墙钢筋应力、底板钢筋应力等的变化规律进行了分析。本工程中地下连续墙实测变形呈悬臂结构变形特征,与工程设计中常用的弹性地基梁比拟法所得结果存在较大差异。从设计方法中对圆形围护结构"拱效应"的模拟,内衬作用的发挥以及地下连续墙槽段接头泥浆的影响等方面对此进行了深入分析,可为同类工程的设计、施工和监测提供借鉴。

This paper analyzes the horizontal displacement of diaphragm wall, earth pressure, pore water pressure and steel bar stress of a circular whirlpool foundation pit based on the monitoring data. In this project, the deformation of diaphragm wall obtained from monitoring data indicates a cantilever-like pattern, which doesn' t coincide with the result by design using elastic foundation beam theory. The problem is discussed herein from several aspects including the simulation of the'arching effect' in circular diaphragm wall, the effect of concrete lining and the influence of slurry between sections of diaphragm wall. It would provide references for design and construction of similar projects.