土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (5): 754-759.

• 专题论述 • 上一篇    下一篇

落石撞击对倾倒式危岩体稳定性影响

许四法1，许鸿基1，石凯锋1，孙昌一2，胡慧静1，王 哲1   

  1. (1.浙江工业大学 土木工程学院，杭州 310023；2.浙江省第一地质大队，杭州 310012)
  • 收稿日期:2023-07-04 修回日期:2023-09-09 出版日期:2025-10-31 发布日期:2025-10-30
  • 作者简介:许四法（1967-），男，教授，研究方向为环境岩土工程。

Influence of Impact of Rockfall Collision on the Stability of Rock Mass Toppling

XU Sifa1, XU Hongji1, SHI Kaifeng1, SUN Changyi2, HU Huijing1, WANG Zhe1   

  1. (1.College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023;
    2.First Division, Geological Exploration Unit of Zhejiang Province, Hangzhou 310012)
  • Received:2023-07-04 Revised:2023-09-09 Online:2025-10-31 Published:2025-10-30

摘要： 危岩体崩塌是地质灾害领域研究的重点问题之一，目前大多是以极限平衡、断裂力学等角度对危岩体进行稳定性评价。考虑落石冲击力，提出了落石冲击下危岩体的稳定系数计算方法，并采用极限平衡法和数值分析对倾倒式危岩体进行稳定系数计算。研究结果表明，采用理论计算和数值模拟分析得到的规律一致，天然、暴雨和落石撞击下的稳定系数分别为4.85、1.21、0.78和2.2、1.11、0.8；暴雨和落石撞击对危岩体稳定性有很大影响，暴雨工况下理论分析和数值分析得到的稳定系数与天然状态相比分别下降了75％和54％；考虑暴雨和落石冲击作用下稳定性系数分别下降了84％和65％。研究结果可为相似工程稳定性评价提供参考。

关键词: 落石, 撞击, 倾倒式危岩体, 冲击力, FLAC3D

Abstract: The collapse of dangerous rock mass is one of the key problems in the field of geological hazards. At present, most of them evaluate the stability of dangerous rock mass from the perspective of limit equilibrium and fracture mechanics. In this paper, considering the impact force of rockfall collision, an estimation method for the stability coefficient of dangerous rock mass under the rockfall impact is proposed, and the stability coefficient of toppling dangerous rock mass is evaluated by using the limit equilibrium method and numerical analysis. The results show that the trends obtained by theoretical estimation and numerical simulation analysis are consistent. The stability coefficients under natural, rainstorm and rockfall impact are 4.85, 1.21, 0.78 and 2.2, 1.11, 0.8 respectively; The rainstorm and rockfall impact have a great impact on the stability of dangerous rock mass. The stability coefficients obtained from theoretical analysis and numerical analysis under rainstorm conditions have decreased by 75% and 54% respectively compared with the natural conditions; The stability coefficient decreases by 84% and 65% respectively under the action of rainstorm and rockfall impact. The research results can provide reference for the stability evaluation of similar projects.

Key words: Falling Rocks, Collision, Toppling Dangerous Rock Mass, Impact Force, FLAC3D

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