|
|
|
| Hazard of Seismic Liquefaction for Metro Tunnel Structural Engineering and Countermeasures |
| YU Jie |
| China Railway First Survey and Design Institute Group Ltd，Xi’an，Shanxi 710043，China |
|
|
|
|
Abstract Research purposes: With the development and utilization of underground space of cities in China, large sections and shallow underground structure are growing at the same time. The former seismic disaster shows that the metro structure can be easily destroyed by the earthquake. One of the main reasons for metro structures destroy is saturated sandy layers liquefaction. At present there is little anti-seismic research of metro underground structure on seismic liquefaction at home or aboard.
Research conclusions:(1)Seismic liquefaction is very destructive for metro tunnel structural engineering. It should be solved carefully. (2) There are three main factors which affect the saturated sandy soil liquefaction which are dynamic load condition, embedding condition and soil texture condition.(3)The specific project should choose suitable methods which are based on buried depth of liquefaction formation, project settings and project type, to deal with seismic liquefaction. Seismic liquefaction can be solved by controlling burial depth, using underground continuous wall-enclosure, strengthening anti-floating ability of structure, and considering additional internal force which is caused by earthquake.(4)The result can be used for the technical and economic comparison in urban rail transit station and tunnel project.
|
|
Received: 05 November 2013
|
|
|
|
|
|
[1] 铁道部第一勘测设计院.铁道工程地质手册[M].北京: 中国铁道出版社, 1999.
First Survey and Design Institute Ministry of Railways. Railway Engineering Geology Handbook [M].Beijing:China Railway Publishing House, 1999.
[2] 杨秀竹, 王星华, 雷金山. 地震时饱和砂土液化机理及统计判别法[J].长沙铁道学院学报，2001(1):35-37.
Yang Xiuzhu , Wang Xing6ua , Lei Jinshan. Mechanism of Earthquake Induced Saturated Sand Liquefaction and Statistics Assessment Method [ J ].Journal of Changsha Railway University , 2001(1):35-37.
[3] 牛瑞丽. 砂土地震液化及其防治[JJ].山西建筑, 2005(24):114-115.
Niu Ruili. Seismic Liquefaction of Sands and Its Prevention [J].Shane Architecture , 2005(24):35-37.
[4] 李空军, 杨勇新, 林建华, 等.饱和砂土液化机理分析及其抗液化措施[J]. 基建优化, 2006(3):83-84.
Li Kongjun, Yang Yongxin, Lin Jianhua, etc. Analysis of Liquefaction Mechanism and Anti-liquefaction Measures of Saturated Sand[J]. Optimization of Capital Construction, 2006 (3) :83-84.
[5] 张春梅, 等. 砂土地震液化危害及地基处理研究[J].世界地震工程，2007(3):113-115.
Zhang Chunmei, etc. The Hazard of Sand Soil Liquefaction and the Foundation Treatment[J]. World Earthquake Engineering, 2007(3):113-115.
[6] 师新明. 国外地震砂土液化研究[J]. 铁道工程学报, 1990(3):148-153.
Shi Xinming. Study on Seismic Liquefaction of Sands Abroad[J]. Journal of Railway Engineering Society, 1990(3):148-153.
[7] 张顺斌，李海波，余波.砂土地震液化及其工程影响[J].中国水运，2010(1):140-141.
Zhang Shunbin, Li Haibo, Yu Bo. Seismic Liquefaction of Sands and Its Affects[J]. China Water Transport, 2010(1):140-141.
[8] GB 50111-2008，铁路工程抗震设计规范[S].
GB 50111-2008，Code for Seismic Design of Railway Engineering [S].
[9] GB 50011-2010，建筑抗震设计规范[S].
GB 50011-2010, Code for Seismic Design of Buildings [S].
|
|
|
|
2014, Vol. 31 
