中文摘要：

基坑开挖引起的坑壁侧移、基坑隆起、墙体破坏是工程重要灾害问题。因此,选择恰当的支护形式是确保工程安全、提高工程质量、降低工程造价的关键。本文以某广场基坑支护项目为例,采用双排桩-锚杆复合支护形式,通过现场原位测试获得土体各项物理参数,应用FLAC^3D有限差分软件模拟基坑开挖,得到各开挖深度下支护结构的水平位移变化规律,通过数值计算结果与工程监测数据对比分析,验证了数值模型的合理性,对基坑支护方案的优化具有一定的指导意义。

英文摘要：

Prone to pit wall lateral,after excavation of foundation pit uplift,the problem such as wall damage,therefore,choose the appropriate supporting form is to ensure that the engineering safety,the key to improve the engineering quality,reduce the project cost. Based on foundation pit supporting project,for example,a square-double row pile composite anchor supporting form,through the various physical parameters of soil field in-situ tests,FLAC^3D finite element software to simulate the excavation,excavation depth is obtained under the horizontal displacement of retaining structure change rule,through comparing the results of numerical calculation and engineering monitoring data analysis,the rationality of the numerical model is verified,the optimization of foundation pit supporting scheme has a certain guiding significance.