引入地层特征值M_S对盾构隧道施工引起的地面沉降规律的初步研究  

A Preliminary Study on the Law of Ground Settlement Caused by Shield Tunnelling Based on the Stratum Characteristic Value M_S

作　　者：王天彪 贾苍琴[2] WANG Tianbiao;JIA Cangqin(China Railway Design Corporation,Tianjin 300000;China University of Geoseienees,Beijing 100083)

机构地区：[1]中国铁路设计集团有限公司,天津300000 [2]中国地质大学(北京),北京100083

出　　处：《现代隧道技术》2018年第6期67-72,共6页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(40902085)

摘　　要：文章以北京地铁某盾构区间隧道为研究对象,通过分析地表沉降监测数据,提出了以改进双曲线模型拟合地面沉降规律、用特征值M_S评价盾构施工条件下地层情况的方法,并研究了地层参数与地表沉降之间的关系。结果表明:盾构隧道施工引起的地表沉降规律符合双曲线分布特征,且在30 d时基本稳定;M_S值越大,地层条件越好,地面沉降越小;改进双曲模型参量与地层特征值M_S存在一定规律性。该研究成果对盾构施工中的地表沉降变形预测具有一定的参考价值。Based on an analysis of monitoring data of surface settlement in the construction of a shield running tunnelof Beijing metro, an improved hyperbolic model was proposed to fit the ground subsidence law, and the characteristic factor MS was used to evaluate the stratum under the condition of shield construction. The relationship betweenstratum parameters and surface settlement was studied, with the results indicate that the surface settlement causedby shield construction complies with hyperbolic distribution and it is basically stable at 30 days, the larger the valueof MS is, the better the conditions of the stratum is and the smaller the settlement is; a certain correlation exists between the parameters of improved hyperbolic model and the characteristic value MS.

关 键 词：北京地铁 盾构工法 地层评价 地层特征值 沉降规律 

分 类 号：U455[建筑科学—桥梁与隧道工程]