超前小口径管幕在广州地铁浅埋暗挖隧道中的应用
王科甫
Application of Advanced Small Caliber Tube Curtain in Shallow Buried Tunnel of Guangzhou Metro
WANG Kefu
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作者信息:1.中铁第一勘察设计院集团有限公司，710043,西安;
2.陕西省铁道及地下交通工程重点实验室（中铁一院），710043，西安
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Affiliation:China Railway First Survey and Design Institute Group Co．，Ltd．，710043，Xi′an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.05.035
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中图分类号/CLCN:U455.49
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栏目/Col:施工技术
摘要:
广州地铁21号线天河公园折返线大断面双线暗挖隧道下穿黄埔大道及市政管线。下穿位置属于复合地层，拱顶地质条件差、隧道埋深浅,且地面对沉降要求高。对传统的超前加固方法及管幕法进行了数值计算分析比较。结果表明,常规的超前加固方法不能满足地表沉降要求，而采用管幕法能有效控制地面沉降。根据数值计算结果，暗挖隧道采用管幕法施工。数值模拟计算结果与实际施工监测数据吻合得较好。
Abstracts:
The large-section double-line undercut tunnel of Tianhe Park return line on Guangzhou metro Line 21 is studied, which crosses under Huangpu Avenue and municipal pipelines, and the lower crossing section is in the compound stratum, featuring bad vault geological condition, shallow buried depth and higher requirements for surface subsidence. Through numerical calculation and comparative analysis of the traditional advanced reinforcement method and the pipe curtain method, it is concluded that the former cannot meet the requirements of surface subsidence, while the latter can effectively control land subsidence. According to a numerical calculation, it shows that the calculated result and the actual construction monitoring data fit well when the pipe curtain method is used in tunnel excavation.
引文 / Ref:
王科甫.超前小口径管幕在广州地铁浅埋暗挖隧道中的应用[J].城市轨道交通研究，2019，22(05):160.
WANG Kefu.Application of Advanced Small Caliber Tube Curtain in Shallow Buried Tunnel of Guangzhou Metro[J].Urban Mass Transit，2019，22(05)：160.
WANG Kefu.Application of Advanced Small Caliber Tube Curtain in Shallow Buried Tunnel of Guangzhou Metro[J].Urban Mass Transit，2019，22(05)：160.
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