结合某项目基坑工程设计实例,介绍了一种基坑工程地下一、二层交界区支护体系的设计分析方法。同时,选用岩土工程有限元程序Z_SOIL.PC 2013,运用三维数值分析方法对本方法进行建模计算,并将计算结果与实测数据加以比较分析,证明了该设计方法的可行性,最后,针对本工程的实践情况,总结了一些工程体会。 Combined with the project design example of a project foundation pit, this paper introduces a design and analysis method of the support system of the underground one and two-story boundary zone of the foundation pit project. At the same time, using the finite element program Z_SOIL.PC 2013 of geotechnical engineering, this method is modeled and calculated by three-dimensional numerical analysis method, and the calculation results are compared with the measured data to prove the feasibility of the design method. Finally, Project practice, summed up some of the project experience.