砂卵石与粉质黏土地层PBA法地铁车站地表沉降对比研究  

Comparative Research on Surface Subsidence of PBA Method of Subway Station in Gravel and Silty Clay Layer

作　　者：王勇 江华[1] 陈庆章[2] 曲行通 贾英男 杨小龙[2] WANG Yong;JIANG Hua;CHEN Qingzhang;QU Xingtong;JIA Yingnan;YANG Xiaolong(School of Mechanics and Civil Engineering,China University of Mining ＆ Technology,Beijing,Beijing 100083,China;China Railway 18 Bureau Group Co.,Ltd.,Beijing 100010,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]中铁十八局集团有限公司,北京100010

出　　处：《施工技术》2018年第19期17-21,共5页Construction Technology

摘　　要：以北京地铁16号线甘家口站和8号线三期六营门站为工程依托,使用ABAQUS有限元软件对这两种地质情况下应用PBA工法修建地铁车站进行数值计算,同时对现场监测数据进行分析。以两种数值模拟计算结果为基础,对两种地层条件下车站的监测数据(最大沉降值、沉降速率、不同施工阶段沉降占比)进行对比。结论如下:在其他条件相同情况下,砂卵石地层中修建地铁车站引起地表沉降值小于粉质黏土地层;不同地层中各阶段沉降占比无较大差异;粉质黏土地层中不同施工阶段沉降速率均大于相同阶段的砂卵石地层。ABAQUS finite element software was used based on subway station of Beijing Subway Line 16 Ganjiakou station and Line 8 Liuyingmen station to analyze using PBA construction method to build subway station in two geological conditions, while the on-site monitoring data was analyzed. Based on the results of two numerical simulations, the monitoring data of the two stations under the two strata conditions are compared with the maximum settlement value, settlement rate and settlement ratio of different construction stages. The results are as follows： Under the same conditions, the surface subsidence caused by the construction of the subway station in the sand and gravel stratum is less than that in silty clay. There is no significant difference in the proportion of sediment in each stage. The sedimentation rate of different construction phase in the silty clay stratum is greater than that in sand and gravel stratum at the same stage.

关 键 词：隧道工程 地铁车站 PBA工法 数值模拟 砂卵石地层 粉质黏土地层 沉降 

分 类 号：U455[建筑科学—桥梁与隧道工程]