摘要
以北京地铁16号线红莲南里车站工程为研究背景,该车站赋存环境条件复杂,对地层沉降控制标准要求高,车站部位地层为低含砂率富水卵石地层,围岩自稳能力差。根据工程赋存的环境条件和地层条件,在施工过程中针对地铁车站主体结构的建造工序、低含砂率卵石地层导洞开挖与支护技术、边桩和中桩的成孔技术、导洞初支与边桩连接节点设置、导洞与中洞拱部初支连接节点设置、车站负二层侧墙的逆作缝处理、车站全施工周期地层沉降动态控制等关键技术开展研究,提出解决措施,确保车站主体结构顺利施工。监测结果表明,车站上方地层沉降也得到有效控制。
The complicated environmental conditions of the Honglian Nanli Station of Beijing’s subway Line 16 require a strict control standard of stratum deformation due to the subway station’s location in a stratum with poor surrounding rock stability.According to the environmental and geological conditions of the project,the following key technologies are discussed in detail and solution measures are suggested for ensuring facile construction of the subway station:a construction procedure of lining the structure in a subway station excavation and the support technology of a pilot tunnel in a low sand-bearing pebble bed,pile drilling technology of the side and middle pile,a connection node between the initial support and side pile of the pilot tunnel,a connection node between the initial support of the pilot tunnel and the initial support of the arch,a reverse construction seam treatment method for the side wall of the underground two-story structure of the station,and dynamic control of stratum settlement during the entire construction period of the station.The monitoring results demonstrate that stratum subsidence above the station is also effectively controlled.
作者
吴卫
王海斌
梁志海
李兆平
李明皓
WU Wei;WANG Haibin;LIANG Zhihai;LI Zhaoping;LI Minghao(Beijing No.4 Municipal Construction Engineering Co.,Ltd.,Beijing 100176;School of Civil&Architecture engineering,Beijing Jiaotong University,Beijing 100044)
出处
《都市快轨交通》
北大核心
2020年第4期90-96,共7页
Urban Rapid Rail Transit
基金
2017年北京市政建设集团有限责任公司科技研究开发计划项目
国家自然科学基金(面上)项目资助(51678033)。
关键词
富水卵石地层
地铁车站
车站建造工序
导洞开挖方法
节点构造措施
逆作缝
地层沉降动态控制
water-rich pebble stratum
subway station
construction process of station
pilot tunnel excavation scheme
node connection measures
reverse construction seam
dynamic control of stratum deformation
