暗挖车站地下连续墙施工地表沉降分析
摘要:工程建设中地下水资源保护问题一直是社会各界关注的焦点。以国内首例城市地铁PBA暗挖车站边导洞内施工地下连续墙止水工程为依托，采用MIDAS/GTS NX软件重点模拟了导洞内地下连续墙施工前、施工中及施工后的地表沉降变化规律，并与现场监测数据进行对比分析。结果表明：1)地下连续墙施工前，地表沉降曲线以车站中线为中心，呈明显对称的沉降槽形式分布;2)地下连续墙施工中，单侧地下连续墙施工完成，其上方地表附近沉降影响最为明显，地表沉降量增量约占总沉降量的25%;3)左右两侧地下连续墙施工完成后，地表沉降量增量曲线类似W型;4)左右侧地连墙分别施工6幅以后，上方地表处沉降趋于稳定，沉降速率基本保持不变。
Abstract:The protection of groundwater resources has always been a focus in engineering construction. This analysis is based on an underground diaphragm wall water stop project, which is the first construction in the side pilot tunnel of PBA underground excavation station of urban subway in China. MIDAS/GTS NX software is used to simulate the ground settlement changes of the diaphragm wall construction in the pilot tunnel, including before construction, during construction and after construction, and the results are compared with the actual field monitoring data. The results show that: (1) before the construction of the diaphragm wall, the center line of the surface settlement curve is the center line of the station, and the distribution of the curves is obvious symmetrical settlement groove. (2) During the construction of diaphragm wall, when the construction of one-sided diaphragm wall is completed, the settlement near the surface above is the most obvious. The maximum increment account is about 25% of the total settlement. (3) After the construction of diaphragm wall on the left and right sides, the incremental curve of surface settlement amount is similar to W-type. (4) After the construction of 6 diaphragm walls on the left and right sides, the settlement on the surface above tends to be stable, and the settlement rate basically remains unchanged.
中文标题：
暗挖车站地下连续墙施工地表沉降分析
Analysis on the Ground Settlement in the Construction of Diaphragm Wall of Subway Excavated Stations
作者：
朱雅倩1,薛洪松2,,,刘希胜2,杜昌隆2,赵旭1,张志红1
Zhu Yaqian1,Xue Hongsong2,,,Liu Xisheng2,Du Changlong2,Zhao Xu1,Zhang Zhihong1
作者简介:朱雅倩,女,1996年生,硕士研究生,主要从事地铁车站施工对周围环境影响方面的研究工作。E-mail:yaqianzhu@126.com通讯作者:薛洪松,男,1981年生,高级工程师,主要从事地下工程施工方面工作。E-mail:40761980@qq.com
通讯地址：
1. 北京工业大学 城市与工程安全减灾教育部重点实验室,北京 100124; 2. 北京建工集团有限责任公司,北京 100055
1.TheKeyLaboratoryofUrbanSecurityandDisasterEngineering,MinistryofEducation,BeijingUniversityofTechnology,Beijing100124,China; 2.BeijingConstructionEngineeringGroup,Beijing100055,China
中图分类号:TU476+.3
doi:10.3969/j.issn.1007-2993.2021.02.002
出版物：岩土工程技术
收稿日期:2020-02-17
网络出版日期:2021-11-12
关键词:PBA,边导洞,地下连续墙,地表沉降
Key words:pile-beam-arch method,pilot tunnel,diaphragm wall,surface settlement
文档包含图片数量：图片(0)张
文档包含表格数量：表格(0)个
参考文献：
基金项目：
基金项目: 国家自然科学基金面上项目(41672289) 国家自然科学基金重点项目(51538001)
- 文件大小:
- 13.02 MB
- 下载次数:
- 60
-
高速下载
|
|
