摘要
太原市迎泽大街下穿火车站通道工程采用新管幕法施工,为国内首例大直径管幕下穿运营火车站的工程.工程地质及周边环境复杂,为减小对周边土体及站内轨道、雨棚、站台等周边环境的影响,保证车站正常运营,管幕施工时必须采用微扰动施工技术.以该工程为背景,采取数值模拟计算管幕施工对周边土体及重要建筑的影响,预估施工风险.对管幕施工中顶管掘进机选型、管节结构与密封、顶管精度控制、顶进参数控制、膨润土触变泥浆、障碍物处理、触变泥浆置换等关键技术进行了研究及应用,经实践证明管幕施工对地层及周边环境的扰动较小,满足车站正常运营要求,也进一步加快了新管幕法的推广应用.
The underpass project was constructed with a new pipe curtain method in Taiyuan Yingze Street which was the first one with large diameter pipe curtain to under pass the operating railway station in China. The engineering geology and surrounding environment were complex. In order to ensure the normal operation of the station, the construction technology of micro-disturbance should be adopted to reduce the influence on the surrounding soil and the surrounding environment such as track, canopy and platform. Based on this project, the influence of pipe curtain construction on surrounding soil and important buildings was calculated by numerical simulation, and the construction risk was estimated. The key technologies were studied and applied in the aspects of pipe jacking tunnelling machine selection, pipe joint structure and sealing, pipe jacking precision control, jacking parameter control, bentonite thixotropic mud, obstacles treatment and thixotropic mud replacement in pipe curtain construction. The practice proved that pipe curtain construction had less disturbance to stratum and surrounding environment, and met the normal operation requirements of the station. The popularization and application of this method were further accelerated.
作者
郭勇
Guo Yong(China Railway 14^th Bureau Group 2^nd Engineering Co. Ltd., Tai' an Shandong 271000, China)
出处
《铁道建筑技术》
2019年第6期96-101,共6页
Railway Construction Technology
基金
国家重点研发计划项目(2018YFC0808700)
2016年山东省第二批科技创新项目(201621901107)
关键词
超浅埋
大直径
管幕
下穿火车站
微扰动
super shallow burying
large diameter
pipe curtain
under through railway station
micro disturbance
