岩溶地区地铁盾构隧道下穿既有建筑物施工控制技术
李明
Construction Control Technology of Metro Shield Tunneling under Existing Buildings in Karst Area
LI Ming
-
作者信息:兰州铁道设计院有限公司，730030，兰州
-
Affiliation:Lanzhou Railway Survey and Design Institute Co., Ltd., 730030, Lanzhou, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2021.06.023
-
中图分类号/CLCN:U455.43;U456.3+1
-
栏目/Col:施工技术
摘要:
以广州地铁12号线聚龙站—棠溪站岩溶地段下穿既有建筑物为工程背景，运用数值模拟软件，分别研究不同施工区间、不同盾构参数对地表沉降的影响。结果表明：施工间隔越大，双线隧道施工后的隧道受扰动、地表的沉降值就越小，故建议在施工时采取右线贯通后左线再行施工的方案；掌子面顶推力与注浆压力越大，地表的最大沉降量就越小；为避免施工中地表隆起及刀盘磨损较快等问题，建议施工掌子面顶推力取0.25 MPa、注浆压力取0.30 MPa；地表沉降的数值模拟结果与现场监测结果虽有一定差别，但整体趋势一致，仍可指导实际施工。
Abstracts:
Taking the Karst Section of Julong station to Tangxi station of Guangzhou Metro Line 12 as the engineering background, by using numerical simulation software, the influence of different construction sections and shield parameters on the surface settlement is studied respectively. The results show that: the larger the construction interval, the less disturbed the tunnel after the construction of double track tunnel and the smaller the settlement value of the ground surface. Therefore, it is suggested to carry out construction from right line to left line. The greater the thrust and grouting pressure of the working face, the smaller the maximum settlement of the surface. In order to avoid the problems of surface uplift and rapid wear of cutter head during construction, it is suggested that the jacking force of the working face should be 0.25 MPa and the grouting pressure should be 0.30 MPa; Although there are some differences between the numerical simulation results and the field monitoring data of surface settlement, the overall trend is consistent, which can still guide the actual construction.
引文 / Ref:
李明.岩溶地区地铁盾构隧道下穿既有建筑物施工控制技术[J].城市轨道交通研究，2021，24（6）：104.
LI Ming.Construction Control Technology of Metro Shield Tunneling under Existing Buildings in Karst Area[J].Urban mass transit，2021，24（6）：104.
LI Ming.Construction Control Technology of Metro Shield Tunneling under Existing Buildings in Karst Area[J].Urban mass transit，2021，24（6）：104.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 顶层规划和需求导向相结合,推动智慧城轨产业化发展
过刊浏览
资料下载
友情链接