盾构穿越既有建筑物沉降预测分析及应用  

Analysis and Application of Settlement Prediction of Shield Tunneling Through Existing Buildings

作　　者：田世文 TIAN Shiwen(Beijing Jianda Jingjing Dafang Engineering Management Co.,Ltd.,Beijing100044,China)

机构地区：[1]北京建大京精大房工程管理有限公司,北京100044

出　　处：《施工技术（中英文）》2021年第17期119-125,共7页Construction Technology

摘　　要：以北京地铁已完工程为实例,研究了盾构下穿地面重要建筑物等具体工程问题。首先介绍了Peck公式与数值模拟2种计算地面沉降的方法,并结合具体工程实际进行应用,计算盾构掘进过程对地面产生的沉降值;再通过对盾构掘进过程进行研究,分析盾构穿越既有建筑物时所需的合理机械参数与注浆参数,以控制盾构掘进过程中开挖面稳定性;其次,针对盾构穿越既有建筑物施工过程对地层的影响,进行监控量测控制,并对监控量测方案进行优化。Taking the completed project of Beijing subway as an example, this paper studies the concrete engineering problems such as the important buildings under shield tunneling. Firstly, Peck formula and numerical simulation are introduced to calculate the settlement value of shield tunneling process, and then the reasonable mechanical and grouting parameters are analyzed to control the stability of shield tunneling process. Secondly, according to the influence of shield tunneling process on strata, monitoring and measurement control are carried out, and the monitoring and measurement scheme is optimized.

关 键 词：地铁 盾构 沉降 数值模拟 监控 量测 方案优化 

分 类 号：U231[交通运输工程—道路与铁道工程]