摘要
为了减小粉质黏土层土体盾构施工引起的地面沉降,依托某地铁盾构施工工程,利用数值模拟的方法,对不同工况进行对比分析,研究了地面沉降与土舱压力、地面荷载、注浆压力和地层加固参数的关系,分析了各种影响地面沉降主要因素的影响效应.结果表明:土舱压力对地面沉降量的影响较小,通过技术措施适当地提高注浆压力、对地层进行加固、降低地面的荷载都能够有效降低地面沉降.
In order to reduce the ground subsidence caused by shield tunneling in silty clay layer,and relying on a metro shield construction project,the method of numerical simulation is adopted,the relationship between land subsidence and cabin pressure,ground load,grouting pressure and formation reinforcement parameters is studied by comparing and analyzing the simulation of different working conditions,and the main factors affecting land subsidence are analyzed.The results show that the effect of cabin pressure on the land subsidence is small,and the land subsidence can be effectively reduced by properly increasing grouting pressure,reinforcing stratum and reducing ground load.
作者
文勇
WEN Yong(China Railway 18^th Bureau Group Co.,Ltd.,Tianjin 300222,China)
出处
《兰州工业学院学报》
2019年第4期55-60,共6页
Journal of Lanzhou Institute of Technology
基金
国家自然科学基金(11662007)
甘肃省建设科技攻关项目(JK2018-33)
关键词
粉质黏土层
盾构施工
地面沉降
数值模拟
silty clay layer
shield construction
land subsidence
numerical simulation
