摘要
为加快整条线路的施工进度,拟在某即将建成的长大车站处增设轨排井,为保证铺轨施工,临时关闭了部分降水井,因此地下水位改变,从而引起既有车站的抗浮计算条件改变,可能对车站产生不利影响。基于现场监测数据,采用三维有限元软件,对地铁车站结构顶板增设轨排井及不同开洞范围所造成的主体结构上浮影响进行研究。研究结果表明:在不考虑车站主体结构与围护结构间摩擦阻力的情况下,封闭部分降水井后,设轨排井附近上浮量较大,并且车站不同部位所受上浮影响程度不同,在采取抗浮措施时应区别考虑。在同一水位条件下,车站顶板开洞范围与主体结构最大上浮量呈现非线性增长关系,因此针对不同开洞范围的轨排井、盾构井以及特殊设备井时,应采取不同措施防止车站主体结构上浮。
In order to speed up the construction progress of the whole line,it is proposed to install additional track wells at a soon-to-be-completed grown-up station.To ensure the track-laying construction,some of the precipitation wells are temporarily closed,thus the groundwater level changes,thus causing a change in the calculation conditions of the floatation resistance of the existing station,which may have a negative impact on the station.The results show that,without considering the friction resistance between the main structure of the station and the enclosure structure,theamount of buoyancy near the railway track Wells is largeafter the closure of part of the precipitation Wells,and the influence degree of buoyancy is different in different parts of the station,so the anti-buoyancy measures should be considered separately.Under the condition of the same water level rise,the roof opening range and the maximum buoyancy of the main structure of the station show a nonlinear growth relationship.Therefore,different measures should be taken to suppress the buoyancy of the main structure of the station for the track wells,shield Wells and other special equipment wells with different opening ranges.
作者
代文超
石钰锋
陈昭阳
胡绍伶
方焘
陈小羊
占宇飞
Dai Wenchao;Shi Yufeng;Chen Zhaoyang;Hu Shaoling;Fang Tao;Chen Xiaoyang;Zhan Yufei(Jiangxi Key Laboratory of Geotechnical Engineering Infrastructure Safety and Control,East China Jiaotong University,Nanchang 330013,China;Jiangxi Architectural Design&Construction Institute Co.,Ltd.,East China Jiao Tong University,Nanchang 330013,China;Communications Construction Company of CSCEC 7th Division Co.,Ltd.,Zhengzhou 450004,China)
出处
《华东交通大学学报》
2023年第3期40-45,共6页
Journal of East China Jiaotong University
基金
国家自然科学基金面上项目(42177162)。
关键词
地铁车站
抗浮验算
上浮量
非线性增长
subway stations
anti-flotation calculation
floating volume
nonlinear growth
