道路刚度对浅埋暗挖法人行地道影响的有限元分析

修建人行地下通道是缓解城市交通拥挤、保障行人交通安全、提高城市运行效率的一项有效措施。人行地道施工不可避免对周边环境造成不利的影响,严重者可能影响地面建构筑物和地下管线的正常使用。本文通过对浅埋暗挖法修建杭州清泰街过街地道的有限元模拟,模拟CRD工法开挖方式通过考虑地道上方道路刚度与否两种模型的对比得出道路刚度对浅埋暗挖人行地道的地表沉降及地层变形的影响规律,并与实测数据进行了对比分析,得出较为一致的结果。研究对此类地道的施工与设计有一定的指导意义。

Finite Element Analysis for The Impact of The Road on The Shallow Buried Tunnel of City Underpass

Construction of the underpass is an effective measure to ease city traffic congestion,to enhance pedestrian safety and to improve the efficiency of the city.The influence of the underpass construction to the surrounding environment is inevitable,even it may affect the ground buildings and the normal use of the underground pipeline.This paper is based on the finite element modelling of shallow buried tunnel of city underpass method,and the main content is to simulate CRD-engineering tunnel excavation method by considering the two models above the road rigidity,and the main purpose is to find the discipline of ground displacement and stress caused by shallow buried tunnel excavation under existing road.Research was done with an actual project site comparison with measurement results,and the results the paper analyzed are satisfactory.This study can provide guide for the similar engineering practices.