基坑开挖引起地表沉降的计算方法

Calculation Method of Surface Settlement Caused by Foundation Pit Excavation

通过分析基坑开挖引起地表沉降的主要原因,梳理了地表沉降的影响因素,进而对不同工况下地表沉降的形态进行深入分析。对于地表沉降的计算方法,研究了Peck曲线法、地层损失法、数值模拟法以及监控量测法的应用特点及适用条件,最后以南京某地铁基坑工程为例对基坑开挖引起的地表沉降进行计算分析。

By analyzing the main causes of surface settlement caused by foundation pit excavation,the influencing factors of surface settlement were sorted out,and then the morphology of surface settlement under different working conditions was analyzed in depth.For the calculation method of surface settlement,the application characteristics and applicable conditions of Peck curve method,formation loss method,numerical simulation method and monitoring and measurement method are studied,and finally the surface settlement caused by foundation pit excavation is calculated and analyzed by taking a subway foundation pit project in Nanjing as an example.