某深基坑支护改进三次样条法反演分析

基于试算法的优选结果、边界条件的选取和进一步反演土压力改进三次样条法,采取此方法以某基坑支护工程为例,计算基坑支护桩的弯矩反演桩后土压力,减小位移误差对反演结果的影响,并与传统三次样条法结果、改进三次样条法反演结果和实际监测结果,进行比较分析,验证改进三次样条法的可行性。

Back Analysis of Improved Cubic Spline Method for Deep Excavation Support

Taking a deep excavation support engineering as the example,this paper depended on the result optimized from trial-and-error method,selection of boundary condition and back analysis of earth pressure to improve cubic spline method.By this method,the bending moment of the pit support pile was calculated to retrieve the earth pressure behind the pile,which may reduce the impact of displacement error on the result of back analysis.The results of traditional and improved cubic spline methods,and the actual measurements were compared and analyzed,thus validating the feasibility of improved cubic spline method.