软土地基中格形地下连续墙护岸前沿土体加固参数研究

Parametric study on soil reinforcement in front of lattice shaped diaphragm wall revetment on soft ground

格形地下连续墙是一种新型直立式护岸结构,整体刚度大,辅之以护岸前沿的软土地基加固,能减少墙体水平位移,确保工程结构和周边环境安全。以某电厂取水口护岸工程为例,介绍格形地下连续墙结构在护岸工程中的应用,利用有限元分析软件Plaxis3D,采用土体硬化模型(HS模型)建立三维模型,给出加固参数设计方法,研究护岸前沿土体加固的面积置换率、加固宽度和加固深度对格形地下连续墙变形的影响。因软土地基上结构受软土强度参数的影响较大,故对软土强度指标和水泥土强度指标进行敏感性分析。

The lattice shaped diaphragm wall is a kind of new revetment structure,which has high rigidity.The structure can be safe and environment-friendly with the help of soil reinforcement in front of revetment to reduce the horizontal displacement of the lattice shaped diaphragm wall.The paper introduces the application of the lattice shaped diaphragm wall revetment based on an engineering project of the water intake in an electricity plant.A 3D model is established by software Plaxis3D and soils are constituted by HS model.The design method of soil reinforcement is given to analyze the influence of the replacement rate,width and depth on the horizontal displacement.Since the revetment in soft clay is sensitive to the soil strength indicators,the sensitivity analysis is carried out.