土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (4): 607-611.

• 专题论述 • 上一篇    下一篇

球状风化体和工程扰动对全强风化混合花岗岩边坡稳定性的影响研究

范孝刚1,李 勇2，陈玮龙2，周春梅2,严 松3，4   

  1. （1.云南交发公路工程有限公司 ，昆明 650041；2.武汉工程大学土木工程与建筑学院，武汉 430073；3.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；4.中国科学院大学，北京 100049）
  • 收稿日期:2021-01-24 修回日期:2022-01-10 出版日期:2022-08-30 发布日期:2022-08-25
  • 通讯作者: 周春梅（1979-），女，教授，研究方向为地质灾害防治。
  • 作者简介:范孝刚（1978-），男，高级工程师，研究方向为公路工程管理。
  • 基金资助:
    云交科教（2018）45号

Influence of Spherical Weathering and Engineering Disturbance on the Stability of Completely or Highly Weathered Granite Slopes

FAN Xiaogang1, LI Yong2, CHEN Weilong2, ZHOU Chunmei2， YAN Song3,4   

  1. (1.Yunnan Jiaofa Highway Engineering Co. Ltd, Kunming 650041；
    2.School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073；
    3.State Key Laboratory for Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071；
    4.University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2021-01-24 Revised:2022-01-10 Online:2022-08-30 Published:2022-08-25

摘要： 为了准确地分析球状风化体混合花岗岩边坡的稳定性，采用有限元强度折减法 Plaxis数值分析软件，来研究孤石含量和开挖效应对混合花岗岩边坡稳定性的影响。研究结果表明：当球状风化体含量为5%~20%时，含量每增加5%，稳定性系数增加9.6%，边坡最危险滑动面向深部发展；当球状风化体含量超过20%时，含量增加5%，稳定性系数增加不到1%；工程扰动影响边坡稳定性，粘聚力每降低5%，边坡稳定性系数下降10%~18%。综合考虑这两种影响因素，通过有限元数值模拟，提出了一种可靠的边坡治理方案。该研究成果可为混合花岗岩边坡设计和稳定性评价提供参考。


关键词: 球状风化体, 混合花岗岩边坡, 孤石含量, 开挖效应, 边坡支护

Abstract: In order to accurately analyze the stability of spherical weathered mixed granite slope, this paper uses the traditional limit equilibrium method and the finite element strength reduction method to study the influence of boulder content and excavation effect on the stability of mixed granite slope by using commercial numerical analysis software GeoStudio and PLAXIS, respectively. The results show that, when the content of spherical weathering material between 5% and 20%, with 5% of sphere weathering content, the slope stability factor of safety increases by 9.6%; the most dangerous sliding of the slope develops towards the deeper depth; When the content of spherical weathered material exceeds 20%, the slope factor of safety increases slowly; The engineering disturbance affects slope stability. With the increase of engineering disturbance, the slope stability decreases. Finally, a reliable slope treatment method is proposed through the numerical simulation. The research results can provide a theoretical reference for the design and stability analysis of mixed granite slope. 

Key words: Spheroidal Weathering, Mixed Granite Slope, Boulder Content, Excavation Effect, Support of Slope

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