城市下穿道路基坑分段式地连墙受力性状分析

Analysis of force characteristics of urban underpass road foundation pit segmented ground wall

分段式地下连续墙用于城市下穿道路基坑支护时,布置灵活,经济适用,具有较好的应用前景。为了分析分段式地下连续墙在作为道路基坑支护结构时的支护效果与受力性状,结合杭州市余杭区文一西路提升改造地下道路工程隧道基坑工程,借助有限元软件对支护效果进行了分析,得出以下结论:分段地连墙对基坑地表沉降具有较好的限制作用,沉降影响范围约为墙身最浅段的2倍;分段地连墙不同墙身深度水平位移不同;分段地连墙不仅具有较好的经济效益,而且与传统地连墙一样具有较好的支护性能。

When the segmented underground continuous wall is used for the support of the foundation pit of the urban underpass road,the layout is flexible,economical,and has a good application prospect.In order to analyze the support effect and stress traits of the segmented underground continuous wall as the support structure of the road foundation pit,combined with the tunnel foundation pit project of wenyi west road upgrading and transformation of wenyi west road in Yuhang District,Hangzhou,the support effect was analyzed with the help of finite element software,and the following conclusions were drawn:The segmented ground wall has a good restrictive effect on the surface settlement of the foundation pit,and the settlement influence range is about 2 times that of the shallowest section of the wall;the horizontal displacement of different wall depths of the sectional connected walls is different;segmented ground walls not only have better economic benefits,but also have better support performance like traditional ground walls.