地下连续墙采用不同支撑形式的位移控制能力对比分析

Comparative Analysis of Displacement Control Capability of Underground Continuous Walls with Different Support Forms

地下连续墙采用不同支撑形式将严重影响其位移控制能力,为研究地下连续墙两种不同支撑结构的基坑周边位移特性,以长沙地铁六号线东郡站基坑为依托,利用FLAC3D有限差分软件,构建了基坑开挖模型,并改变土层的强度,对比分析了两种支撑对地下连续墙位移控制能力的影响。分析表明锚杆在土层强度较弱时支护效果较差,锚杆的支护效果对土层强度的改变敏感性较强,而内支撑的支护效果对土层强度的改变敏感性较低。

The use of different supporting forms of underground continuous wall will seriously affect its displacement control ability. To study the displacement characteristics of the surrounding pits of two different supporting structures of underground continuous wall relying on the foundation pit of Dongjun Station of Changsha Metro Line 6 and using FLAC3D The finite difference software is used to construct the excavation model of the foundation pit and change the strength of the soil layer. The displacement control ability of the two supports to the underground continuous wall is compared. The analysis shows that the anchor rod has poor support effect when the strength of the soil layer is weak. The support effect of the anchor rod is more sensitive to the change of the soil layer strength,and the support effect of the inner support is more sensitive to the change of the soil layer strength.