| 湿陷性黄土隧道三台阶法施工时间应变规律 |
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| 引用本文： | 周烨,刘仲仁,刘兴平,胡锁滨. 湿陷性黄土隧道三台阶法施工时间应变规律[J]. 隧道建设, 2010, 30(2): 128-130,189 |
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| 作者姓名： | 周烨 刘仲仁 刘兴平 胡锁滨 |
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| 作者单位： | 1. 中铁十九局集团有限公司兰渝铁路项目部,甘肃,定西,743001;北京交通大学土建学院,北京,100044
2. 兰渝铁路有限责任公司,兰州,730050 |
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| 摘 要： | 通过对湿陷性黄土围岩监测，揭示时间应变规律，结合此规律形成一套三台阶施工工法，并总结出使用此工法施工围岩的变形特性如下：上台阶开挖后稳定7d左右，表现为沉降，在施工二台阶马口时，允许上台阶初期支护在可控范围内下沉，也是应力释放的过程；三台阶施工沉降变形规律与二台阶类似，在仰拱封闭后，围岩趋于稳定。
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| 关 键 词： | 湿陷性黄土 隧道 三台阶法 时间应变规律 |
| 收稿时间： | 2010-01-04 |
| 修稿时间： | 2010-04-01 |
Rule of Time-dependent Stress of Tunnels in Wet Subsidence Loess Constructed by 3-bench Excavation Method |
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| ZHOU Ye,LIU Zhongren,LIU Xingping,HU Suobin. Rule of Time-dependent Stress of Tunnels in Wet Subsidence Loess Constructed by 3-bench Excavation Method[J]. Tunnel Construction, 2010, 30(2): 128-130,189 |
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| Authors: | ZHOU Ye LIU Zhongren LIU Xingping HU Suobin |
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| Affiliation: | 1.Lanzhou-Chongqing Railway Project Headquarters of China Railway 19th Bureau Group Co./a>;Ltd./a>;Dingxi 743001/a>;Gansu/a>;China/a>;2.School of Civil Engineering and Architecture/a>;Beijing Jiaotong University/a>;Beijing 100044/a>;3.Lanzhou-Chongqing Railway Co./a>;Lanzhou 730050/a>;China |
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| Abstract: | The rule of the time-dependent strains of the tunnels in wet subsidence loess ground is revealed by means of monitoring of the wet subsidence loess ground.A kind of 3-bench construction method is developed on basis of the rule of the time-dependent strains.The deformation behavior of the tunnels constructed by 3-bench excavation method is summarized as follows: After top heading excavation,the tunnel stability can maintain 7 days before settlement occurs;During the excavation of the second bench,the control... |
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| Keywords: | wet subsidence loess tunnel 3-bench method rule of time-dependent stress |
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