Failure Depth of Rock Mass under Strong Earthquake and Its Influence on Surrounding Rock Pressure of Tunnel

赵玉报; 陈寿根; 周泽林; 涂鹏

doi:10.13409/j.cnki.jdpme.2015.06.020

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Failure Depth of Rock Mass under Strong Earthquake and Its Influence on Surrounding Rock Pressure of Tunnel

更新时间：2025-12-11

- Failure Depth of Rock Mass under Strong Earthquake and Its Influence on Surrounding Rock Pressure of Tunnel
- Vol. 35, Issue 6, Pages: 833-838(2015)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2015.06.020
  CLC： 451.2
- Published：2015
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[1]赵玉报,陈寿根,周泽林,涂鹏.强震作用下岩体破坏深度及对隧道围岩压力的影响[J].防灾减灾工程学报,2015,35(06):833-838.

赵玉报, 陈寿根, 周泽林, et al. Failure Depth of Rock Mass under Strong Earthquake and Its Influence on Surrounding Rock Pressure of Tunnel[J]. 2015, 35(6): 833-838.
[1]赵玉报,陈寿根,周泽林,涂鹏.强震作用下岩体破坏深度及对隧道围岩压力的影响[J].防灾减灾工程学报,2015,35(06):833-838. DOI： 10.13409/j.cnki.jdpme.2015.06.020.

赵玉报, 陈寿根, 周泽林, et al. Failure Depth of Rock Mass under Strong Earthquake and Its Influence on Surrounding Rock Pressure of Tunnel[J]. 2015, 35(6): 833-838. DOI： 10.13409/j.cnki.jdpme.2015.06.020.

摘要

5·12地震后

震区岩体受到了不同程度的破坏

产生了大量松动岩体

对新建隧道围岩压力产生了较大的影响。为研究地震力对岩体的破坏深度以及震裂松散岩体对隧道围岩压力的影响

基于波动理论和摩尔库伦准则

分析了地震力对岩体破坏的极限深度

推导出解析公式

并通过波速测试结果对震裂松散岩体的松动深度进行了探讨

最后就松散岩体对隧道围岩压力的影响进行了理论分析。研究结果表明:1地震力对岩体破坏有一极限深度

隧道埋深越浅

岩体越易产生破坏;2岩体破坏极限深度与岩体力学参数及地震水平震动速度有关

汶川地震震区岩体的极限破坏深度最大达112m;3汶川地震震后

不同松动程度的岩体分别占破坏岩体深度的20%、30%和50%;4震裂松散岩体对围岩竖向松动压力有较大影响

主要原因为震裂松散体的存在

改变了震后岩体的深浅埋分界深度

在震后松散岩体中修建隧道应按等效埋深来确定深浅埋分界深度。

Abstract

After″5.12″earthquake

the rock mass in seismic zone was subjected to different degrees of damage to form a lot of loose rock mass.Meanwhile surrounding rock pressure of tunnel was greatly affected.Based on wave theory and Mohr-coulomb failure criterion

the limiting failure depth of rock mass was explored.Using the derived analytical formulas

the failure depth of rock masses was calculated.Finally

the division of loose depth was analyzed through in-situ wave velocity tests and comparative analysis of different results.The results show that:（1）There is a limiting failure depth of rock mass

the more shallow of buried depth of tunnel

the more vulnerable to damage.（2）The limiting failure depth is closely related to mechanical parameters of rock mass and seismic horizontal velocity

and the maximal failure depth is 112 min seismic area of Wenchuan M8.0Earthquake.（3）The percentage of different degree of looseness is20%

30% and 50%.（4）Loose rock mass has great influence on the vertical loose pressure of surrounding rock.

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references

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