Shaking table tests of influences on tunnel seismic response from loosen zone and buffer layers

被引：0
|
作者：
Zhao X. [1 ]
Li R. [1 ]
Tao L. [1 ]
Li S. [2 ]
Huang J. [3 ]
Zhao M. [1 ]
机构：
[1] Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing
[2] Shenzhen Branch, Beijing General Municipal Engineering Design and Research Institute Co., Ltd., Shenzhen, 518042, Guangdong
[3] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2018年 / 37卷
关键词：
Buffer layer; Dynamic response; Loosen zone; Mountain tunnels; Shaking table model test; Tunnelling engineering;
D O I：
10.13722/j.cnki.jrme.2017.1176
中图分类号：
学科分类号：
摘要：
The installation of the buffer layers is of advantages to the seismic resistance of the tunnel. A set of flexible airbag loading system suitable for dynamic model test on shaking tables was developed to simulate the gravity stress of tunnel overburden. Dynamic response mechanism of loosen zone and buffer layers were analysed and compared based on tests data of acceleration, additional strain, additional bending moment and structure failure. It could be concluded that: (1) Both the loosen zone and buffer layers did not change the dynamic response rule and the damage mode of tunnel structures;(2) Due to the existence of loosen zone, the restraint effect of the surrounding rock on the tunnel structure is weakened, resulting in the increase of the deformation in tunnel structure. The additional bending moment of the structure increases, indicating that it is more vulnerable to damage in earthquakes considering loosen zones;(3) The installation of the buffer layers can effectively reduce the structure additional strain caused by seismic load, which improved the mechanical performance of the structure. This layer coordinated the overall deformation of the tunnel and improved the seismic performance of the structure;(4) In such problems, that tunnel structure surrounded by a softer medium layer, stiffness is the key factors which could be concluded in material thickness and strength. © 2018, Science Press. All right reserved.
引用
收藏
页码：3310 / 3319
页数：9
相关论文
共 17 条
  • [1] Zhou X., Song H., Overseas wall rock loose circle support theories research general situation, Mine Construction Technology, 15, 4, pp. 67-71, (1994)
  • [2] Shi G., The development of roadway theory based on broken rock zone, Hebei Coal, 4, pp. 1-4, (1995)
  • [3] Qin S., Song H., Du X., Et al., Research and application of support theory for Loosen zone, West-China Exploration Engineering, 23, 12, pp. 105-109, (2011)
  • [4] Dong F., Song H., Guo Z., Et al., Roadway support theory based on broken rock zone, Journal of China Coal Society, 19, 1, pp. 21-32, (1994)
  • [5] Jiang S., Cai Z., Lin Z., Et al., Kalman filtering and FEM coupling back analysis method considering broken zone and its application to stability analysis of surrounding rock, Rock and Soil Mechanics, 30, 8, pp. 2529-2534, (2009)
  • [6] Lai X.P., Ren F.H., Wu Y.P., Et al., Comprehensive assessment on dynamic roof instability under fractured rock mass conditions in the excavation disturbed zone, International Journal of Minerals Metallurgy and Materials, 16, 1, pp. 12-18, (2009)
  • [7] Yuan Q., Influence of blasting for driving rock roadway on stability of surrounding rock, Coal Mining Technology, 14, 3, pp. 100-102, (2009)
  • [8] Shao D., Influence of vibration of blasting for driving rock roadway on stability of surrounding rock, Coal Mine Blasting, 3, pp. 11-13, (2009)
  • [9] Sun Y., Study on wall rock broken zone's earthquake response of underground chamber, (2010)
  • [10] Wang X., Pan Y., Li Y., Effect of confining pressure on distributions of horizontal and vertical stresses around rectangular roadway and broken rock zone, Chinese Journal of Underground Space and Engineering, 2, 6, pp. 962-966, (2006)
12