地铁车站深基坑施工对地面变形特点研究
2016-05-14王泽东

【摘要】城市地铁大多修建在周边建筑较为密集的区域,施工环境较为复杂。南昌市首次进行地铁建设,无相关经验,因此选取赣江东岸的中山西路站作为实验站,在施工的同时结合工程建设,对深基坑施工对地面变形特点以及周边环境的影响等问题进行分析、研究,既保证了实验站的顺利施工,还为下一步的南昌市地铁设计、施工积累了相关经验。
【关键词】地铁车站;深基坑;地面变形特点
Study on Ground Deformation Characteristics of Deep Foundation Pit Construction in Subway Station
Wang Ze-dong
(China Railway eleventh Bureau Group Fourth Engineering Co,ltdNingbaoZhejiang315100)
【Abstract】Most of the urban subway construction in the surrounding buildings are more intensive areas, the construction environment is more complex. Nanchang City, the first time for subway construction, no relevant experience, so the east coast of Gan River in Zhongshan West Station as an experimental station, in conjunction with the construction of the construction of the deep foundation pit on the ground deformation characteristics and the surrounding environment and other issues , Research, both to ensure the smooth construction of the experimental station, but also for the next subway Nanchang design, construction has accumulated relevant experience.
【Key words】Subway station;Deep foundation pit;Ground deformation characteristics
1. 引言
随着城市不断发展,拥挤的交通既影响了市民的出行,也阻碍了社会经济的发展。为合理开发城市空间、改善市民出行的条件、减少地面交通的压力,南昌市的地铁工程开始进入真正的建设实施阶段。轨道交通1 号线是南昌市同时也是江西省的第一条地铁。地铁车站深基坑[1~3]开挖施工存在着较大的安全风险,国内外因为深基坑施工出现的质量、安全事故较多。基坑内土体开挖后,在坑外土压力及水压力的作用下,围护结构往往会变形,进而易出现基坑围护结构渗漏水、涌水、涌砂、坑底隆起等,进而引起坑外地面及建(构)筑物变形[4~6]等,更为甚者酿成基坑失稳坍塌的安全事故。为此,根据南昌市的工程及水文地质情况,并结合国内地铁深基坑施工情况采用资料筛选及文献总结法对深基坑施工对地面变形特点、深基坑施工监测的意义、深基坑施工监测方法等进行研究。
2. 工程概况
南昌市轨道交通1号线总体呈由先由东向西向然后转由南北向,奥体中心站是起点,途经北京东路、北京西路、中山路、中山西路、穿赣江、世茂路、丰和大道,一路向北到下罗的蛟桥站。……
