复杂周边环境下超厚软流塑土层地下车站工法比选

Comparison and Selection of Construction Methods for Underground Station with Super-Thick Soft Flow Plastic Clay Under Complicated Surrounding Environment

依托南京市轨道交通某地下车站,对周边敏感环境和不良地质条件下地铁车站工法选型展开研究,从安全性、可实施性两方面对明挖顺作法和盖挖逆作法进行比选,对敏感环境下的开挖效应展开数值模拟。计算结果表明,盖挖逆作法既是控制变形首选工法,又能保证施工进度和预期经济技术效益。

Relying on an underground station of Nanjing rail transit,research on the selection of the construction method of subway station under the surrounding sensitive environment and bad geological conditions was carried out,and the open cut method and the cover cut method were compared and selected from the aspects of safety and exploitativeness,and carried out a numerical simulation of the excavation effect in a sensitive environment.The calculation results showed that the cover-excavation top-down method is the preferred method of deformation control,and it can ensure the construction progress and expected economic and technical benefits.