裂隙岩体内嵌入式挡土墙施工技术与数值分析

Construction Technology and Numerical Analysis of Retaining Wall Embedded in Fractured Rock Mass

为了解决城市道路路堑开挖影响临近建筑物安全问题,介绍英国道路嵌入式挡土墙施工技术。根据围岩性质和裂隙特点,确定挡土墙工程数值分析方法。采用位移反演方法计算了围岩力学参数,应用FLAC3D软件对工程进行了数值模拟。初步探讨了嵌入式挡土墙设计要点。研究表明,由于挡土墙在施作过程中增加了水平荷载和稳定基础,改变了挡土墙受力状态,减小了对周边建筑物的影响。对城市内影响临近结构物的路堑开挖施工,该挡土墙施工技术提供了一种很好的解决方案和施工方法,对深基坑开挖支护也有很好的借鉴意义。

In order to solve the issues of cutting excavation affecting the safety of adjacent structures in city, a construction technology of embedded retaining wall in British road is introduced. According to the properties of surrounding rock and the fracture characteristics of rock mass, the numerical analysis method of retaining wall project is determined. The mechanical parameters of surrounding rock are calculated by displacement inversion, and the project is numerically simulated by software FLAC3D. The design gist of embedded retaining wall is preliminary discussed. The result shows that （ 1 ） the embedded retaining walk reduced the effect on the adjacent buildings owing to its change of stress state caused by increasing horizontal load and stabilized base during the working process. This Construction technology provided not only a good solution and construction method for cutting excavation affecting the adjacent structures in city, but also a beneficial reference for deep foundation pit excavation retaining.