土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (3): 345-347.

• 专题论述 • 上一篇    下一篇

不同分布区域的裂隙对于边坡稳定性影响分析

骆崇木   

  1. （中电能（安徽）勘测院有限公司，安徽马鞍山 243000）
  • 收稿日期:2019-11-04 修回日期:2019-11-11 出版日期:2020-06-20 发布日期:2020-06-22
  • 作者简介:骆崇木（1978-），男，工程师，研究方向为岩土工程勘察。

Analysis of the Influence of Cracks in Different Distribution Areas on Slope Stability

LUO Chongmu   

  1. (China Electric Energy Anhui Survey Institute Co. , Ltd. Maansham 243000)
  • Received:2019-11-04 Revised:2019-11-11 Online:2020-06-20 Published:2020-06-22

摘要： 边坡外表裂隙易对边坡稳定性产生不利的影响，尤其在地震荷载作用下。以传统的极限分析上限法为理论基础，结合强度折减法和拟静力法，推导不同区域处的裂隙边坡安全系数计算方程。探究地震荷载以及裂隙的存在对于边坡稳定性的影响，研究结果表明：裂隙的存在会对坡体的安全系数产生超过20%的折减，而地震荷载作用同样对裂隙边坡的影响显著，折减程度超过20%；裂隙的影响区域存在一定分布规律，靠近坡顶附近，裂隙的存在对于边坡稳定性的影响非常显著，而远离坡顶区域，坡体将不受裂隙的影响。

关键词: 裂隙, 地震荷载, 安全系数, 分布区域

Abstract: The field investigation observed that there are a large number of cracks on the surface of a slope. The presence of these fractures is adversely affecting the stability of the slope, especially under seismic conditions. Therefore, the study on the stability of the cracked slope is particularly important. Using the conventional limit equilibrium upper limit analysis method, combined with the strength reduction and the quasi-static methods, factor of safety of the fractured slope at different zones is then derived and the influence of earthquakes and presence of fractures on the stability of slope are investigated. The results show that the presence of fissures will reduce the factor of safety of slopes by up to more than 20%, and the earthquakes also significantly affect the slope stability can be as much as more than 20%. The location of the fractures is also important, fractures that away from the slope have little impact on the stability.


Key words: Cracks, Seismic Loading Conditions, Factor of Safety, Distribution Area

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