地铁深基坑施工对超近距互通式立交桥基础变形的影响

Influence of the construction of deep foundation pit of subway on foundation deformation of interchange in ultra-short distance

为研究长春土岩二元结构地层某地铁深基坑施工对超近距互通式立交桥的影响,文章以临近超近距互通式立交桥的新建地铁车站深基坑工程为例,对地铁深基坑工程施工进行设计;并用ANSYS计算分析程序对临近超近距既有互通式立交桥的新建地铁车站深基坑施工过程进行数值计算分析,总结地铁车站深基坑施工过程中既有互通式立交桥位移变化特征和规律;将模拟计算结果与施工过程中的动态监测数据进行对比分析,两者基本一致,验证了模拟分析的可实施性。

In order to study the influence of the construction of deep foundation pit of a subway on the interchange in ultra-short distance in soil-rock dual structural stratum of Changchun City,this paper takes the deep foundation pit project of a new subway station with an ultra-short distance to interchange as an example.The construction of the deep foundation pit of the subway is designed,and the construction process of the deep foundation pit of the new subway station near the existing interchange is numerically analyzed by using ANSYS calculation analysis program.The features and rules of the displacement variation of the interchange in the construction of the deep foundation pit of the subway station are summarized.The calculation results are in accordance with the dynamic monitoring data in the construction process,thus verifying the feasibility of simulation analysis.