盾构曲线段施工地表沉降监测与变形规律  

Surface Subsidence Monitoring and Study on Deformation Laws in Shield Curve Tunnel Construction

作　　者：曹伍富[1] 李文聪[2] 马雪梅[2] 张波[2] 

机构地区：[1]北京市轨道交通建设管理有限公司,北京100037 [2]北京城建勘测设计研究院有限责任公司,北京100101

出　　处：《都市快轨交通》2014年第4期85-89,共5页Urban Rapid Rail Transit

摘　　要：研究直径10.0 m的土压平衡式盾构机曲线段的施工地表沉降变形规律。以北京地铁某盾构区间曲率半径R=350 m和R=354 m两处曲线施工段为监测对象,以几何水准测量为监测方法,通过对监测数据的分析得到如下结论:沉降变形主要经历前期沉降、盾尾脱出后沉降、注浆隆起、稳定沉降、后期沉降5个阶段,最终变形值分布包络图近似呈偏正态分布,对称轴线偏于曲线内侧。Deformation laws of the Ф10.0 meter EPB shield curve construction are studied. The radius of curvature R=350 m and R = 354 m in one metro tunnel in Beijing Subway are selected as the monitoring objects. The geometrical leveling is taken as the monitoring method. It could be known through the analysis of subsidence deformation data that the main settlement deformation undergoes 5 stages： pre-settlement, settlement after shield tail prolapsed, grouting uplift, stable settlement, and post-settlement. The envelope graph of ultimate settlement presents an approximate partial normal distribution; the symmetric axis is partial to the inner side of the curve.

关 键 词：城市轨道交通 盾构法 土压平衡式 沉降变形规律 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]