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Discussion on the Computing Model for Xi'an Metro Tunnel Passing Through the Ground Fissure Zone(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2011年第01期
Page:
95-100
Research Field:
地质工程
Publishing date:

Info

Title:
Discussion on the Computing Model for Xi'an Metro Tunnel Passing Through the Ground Fissure Zone
Author(s):
MEN Yu-ming; ZHANG Jie-hong; LIU Hong-jia; HAN Dong-dong; WANG Hai-ying
School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
ground fissure;  metro tunnel;  gap;  deformation characteristic;  computing model
PACS:
P642.26;TU354
DOI:
-
Abstract:
According to the analysis of the large physical model test on Xi'an Metro tunnel passing through the ground fissure zone, two deformation characteristics in the metro tunnel were found when ground fissures were active. Firstly, the change happened when the tunnel was in load; secondly, the gap appeared at the bottom of the tunnel. The gap appeared in monolithic and shield tunnels. The reason was that the deformations of the surrounding strata and tunnel were incongruous. The size of the gap had significant effect on metro tunnel deformation and internal force calculation. On the basis of the analysis of the tunnel deformation characteristics, four deformation calculating models of the tunnel passing through the ground fissure zone were summarized. For the long monolithic tunnel, to fix one end and simply support the other was a calculating model, another model was to fix one end and directly support the other; for the short monolithic tunnel, the simplified overhanging beam could be used; for the shield tunnel, to fix one end and directly support the other was the calculating model. Finally, the tunnel numerical models under the condition of the gap were discussed. The calculating examples showed that it was very crucial to process interface between the tunnel and the soil in the numerical calculation; otherwise, the calculation would cause the major error.

References:

[1] 彭建兵,范 文,李喜安,等.汾渭盆地地裂缝成因研究中的若干关键问题[J].工程地质学报,2007,15(4):433-440.
[2] 张家明.西安地裂缝研究[M].西安:西北大学出版社,1990.
[3] 王景明.地裂缝及其灾害的理论与应用[M].西安:陕西科学技术出版社,2000.
[4] 李永善,耿大玉,林继华,等.西安地裂及渭河盆地活断层研究[M].北京:地震出版社,1992.
[5] DBJ 61-6—2006,西安地裂缝场地勘察与工程设计规程[S].
[6] 彭建兵,范 文,黄强兵,等.西安市城市快速轨道交通二号线穿过地裂缝带的结构措施研究[R].西安:长安大学,2006.
[7] 黄强兵,彭建兵,门玉明,等.地裂缝对地铁明挖整体式衬砌隧道影响机制的模型试验研究[J].岩石力学与工程学报, 2008,27(11):2324-2331.
[8] 黄强兵,彭建兵,樊红卫,等.西安地裂缝对地铁隧道的危害及防治措施研究[J].岩土工程学报,2009,31(5):781-788.
[9] 范 文,邓龙胜,彭建兵,等.地铁隧道穿越地裂缝带的物理模型试验研究[J].岩石力学与工程学报, 2008,27(9):1917-1923.
[10] 胡志平,赵振荣,朱启东,等.西安某地裂缝两侧黄土物理力学性质试验[J].地球科学与环境学报,2009,31(1):85-88.
[11] 邓亚虹,彭建兵,卢全中,等.地铁工程地质灾害危险性综合评估定量方法——以西安地铁一号线为例[J].地球科学与环境学报,2009,31(3):291-294.
[12] 门玉明,石玉玲.西安地裂缝研究中的若干重要科学问题[J].地球科学与环境学报,2008,30(2):172-176.
[13] 门玉明,王启耀.地下建筑结构[M].北京:人民交通出版社,2007.
[14] Timoshenko S P,Young D H.结构理论[M].叶红玲,杨庆生,译.北京:清华大学出版社,2005.

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Last Update: 2011-03-20