上海某地铁车站室内模型试验降水沉降分析

Settlement Analysis of a Laboratory Model Test of Dewatering of a Metro Station in Shanghai

随着城市地下空间的开发利用,深基坑工程越来越受到人们的关注,尤其是软土地区毗邻已运营地铁段的深基坑开挖更是一项高难度的工程。通过对上海地铁某站的室内降水实验,并在整理和分析了降水井水位和流量、孔隙水压力、分层沉降量、地表沉降量等各种监测数据的基础上,总结出了降水时影响沉降因素之间的关系,为之后的工程降水提供较好的设计经验和改善方案,确保了该地铁基坑工程施工的安全性和围护结构的整体稳定性。

With the exploitation of urban underground spaces, deep foundation pit constructions increasingly are evaluated. Pits in soft soil areas adjacent to operating subway are especially difficult to excavate. After indoor testing of water drainage for a station on the Shanghai Metro line 9, and on the basis of treatment and analysis of water level drain hole and flux monitoring data, pore water pressure, layered settlement and surface soil settlement, we summarize the relationship between factors influencing settlement during water drainage. This research offers design experience and blueprints for water drainage and ensures the safety of metro pit construction and enclosure structure stability.