摘要
基于ABAQUS数值模拟方法,逐渐减小开挖面支护压力模拟管节顶进过程中土仓压力的变化,研究支护压力变化过程中地表沉降和变形规律,并对影响开挖面及地表位移的因素进行探讨。结合某市顶管工程,对顶管机到达不同开挖面时的地表竖向位移进行监测。结果表明:当开挖面达到极限支护压力时,引起地表产生附加竖向位移;地表沉降曲线呈高斯分布,且因管节埋深、土体黏聚力和内摩擦角的不同呈现不同的分布范围和沉降量;地表监测数据与数值模拟结果趋势吻合。
Based on the numerical simulation method of ABAQUS,pressure changing are simulated to study the surface subsidence and deformation,the factors which influence the excavation surface and the surface displacement are also discussed.Based on the pipe-jacking works of a city,the vertical displacement of the surface is monitored when the pipe-jackers reach different excavation surfaces.The results show that the additional vertical displacement is generated when the ultimate supporting pressure is reached.The surface subsidence curve is Gaussian distribution,the depth of the pipe,the cohesion of the soil and the internal friction angle show different distribution range and settlement.The surface monitoring data is consistent with the numerical simulation results.
作者
郭成超
赵崇
张冲
GUO Chengchao;ZHAO Chong;ZHANG Chong(School of Water Conservancy and Environment Engineering,Zhengzhou University,Zhengzhou,He'nan 450001,China)
出处
《施工技术》
CAS
2019年第1期110-115,共6页
Construction Technology
基金
国家重点研发计划项目(2016YFC0802402)
河南省重大科技专项项目(171100310100)
关键词
地下工程
顶管
开挖面
支护
压力
沉降
underground
pipe-jacking
excavation face
supporting
pressure
settlement
