Research on the Stability Mechanisms and Comprehensive Management Strategies of Karst Municipal Slopes Based on Integrated Geophysical Exploration

ZHONG Shuai; YU Jinghan

doi:10.3724/j.issn.1674-4969.20250012

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Research on the Stability Mechanisms and Comprehensive Management Strategies of Karst Municipal Slopes Based on Integrated Geophysical Exploration

更新时间：2026-07-25

- Research on the Stability Mechanisms and Comprehensive Management Strategies of Karst Municipal Slopes Based on Integrated Geophysical Exploration
- Journal of Engineering Studies Pages: 1-13(2026)
- 作者机构：
  
  1.贵州省产业基础设施投资有限公司，贵阳 550001
  2.贵州水投宣威工程有限公司，黔东南州 557604
- 作者简介：
- 基金信息：
- DOI：10.3724/j.issn.1674-4969.20250012
  CLC： TU457;P642.25
- CSTR：32282.14.JES.20250012
- Received：17 March 2025，
  
  Revised：2025-04-07，
  
  Online First：25 July 2026，
- 稿件说明：
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钟帅,于璟晗.基于综合物探的喀斯特市政边坡失稳机理与综合治理研究[J].工程研究——跨学科视野中的工程,

ZHONG Shuai,YU Jinghan.Research on the Stability Mechanisms and Comprehensive Management Strategies of Karst Municipal Slopes Based on Integrated Geophysical Exploration[J].Journal of Engineering Studies,
钟帅,于璟晗.基于综合物探的喀斯特市政边坡失稳机理与综合治理研究[J].工程研究——跨学科视野中的工程, DOI：,10.3724/j.issn.1674-4969.20250012. CSTR： 32282.14.JES.20250012.

ZHONG Shuai,YU Jinghan.Research on the Stability Mechanisms and Comprehensive Management Strategies of Karst Municipal Slopes Based on Integrated Geophysical Exploration[J].Journal of Engineering Studies, DOI：,10.3724/j.issn.1674-4969.20250012. CSTR： 32282.14.JES.20250012.

摘要

喀斯特地区溶洞、溶蚀裂隙广泛发育，岩体完整性差，叠加降雨软化、周边建筑附加荷载作用，市政运营岩质边坡极易发生滑塌灾害，现有研究缺乏竣工运营道路边坡滑塌一体化勘察与定量支护设计体系。以贵州喀斯特市政道路滑塌边坡为工程实例，采用地质雷达联合孔壁电视开展综合精细勘察，精准确定滑塌深度6.8～7.2 m，识别3.2～3.6 m泥质充填软弱夹层为滑移控制面；结合极射赤平投影、极限平衡法、FLAC3D模型开展边坡稳定性定性与定量分析，剖析岩体破碎、外部超载、降雨入渗耦合致滑机理。结果表明：降雨使软弱夹层黏聚力下降40%，地下水作用下边坡稳定性系数不满足规范要求，处于欠稳定状态；构建基于岩体饱和单轴抗压强度FRK的锚杆间距计算模型，提出“清滑体+长锚杆锚固+C30混凝土面板+立体排水”综合治理方案。治理后边坡整体达到稳定状态，立体排水系统可降低坡体孔隙水压力35%。研究形成喀斯特岩质边坡参数化勘察支护成套技术范式，可为岩溶区同类市政边坡滑塌处置提供标准化技术参考。

Abstract

Municipal slopes in karst areas have become a key bottleneck restricting urban development due to the development of karst caves

dense joints

obvious dissolution and outstanding stability problems. Slope collapse poses a serious threat to municipal facilities and public safety

so it is urgent to find out the causes of the collapse and put forward a scientific treatment plan. This study takes a municipal road slope in karst area as the object

aiming at revealing its instability mechanism and establishing a support design paradigm driven by karst geological parameters.

Ground penetrating radar and borehole panoramic imager are used to carry out fine survey. The detection range extends 10-20 m from the collapse area with a height of 7.8 m and a width of 4.6 m

the distance between survey lines is 20-30 m

and the drilling depth of control points is not less than 5 m below the potential sliding surface. On this basis

the stereographic projection method is used for qualitative evaluation

supplemented by plane sliding method

wedge failure method and FLAC3D joint model for quantitative calculation

and the mechanical parameters of rock mass are comprehensively determined (FRK=40.7MPa). Based on this

the comprehensive treatment scheme of "sliding body removal + φ25 anchor reinforcement (length 9~12 m

spacing calculated by

=1.2 (FRK)

0.5

) + C30 concrete panel + stereo drainage system (spacing 2m drainage holes)" is put forward.

The research results show that the causes of collapse can be summarized in three aspects: (1) geological factors-rock mass fragmentation

with four groups of structural planes; (2) External load-the overload of surrounding buildings exceeds the bearing capacity of the original support; (3) Influence of rainfall

the cohesion decreases by 40% (from 23 kPa to 13.8 kPa). In terms of investigation

the ground penetrating radar accurately measured the collapse depth of 6.8～7.2m

and the borehole panoramic imager effectively revealed the spatial distribution of argillaceous interlayer. In terms of design

the calculation model of anchor spacing optimizes the theoretical spacing from 7.6m to 2.0m actually adopted. After treatment

the stability of the slope is improved from unstable state to stable state.

(1) An integrated investigation system (GPR

borehole televiewer

drilling

and stereographic projection) was established for karst slopes

identifying a 6.8—7.2 m collapse depth

a 3.2—3.6 m weak interl

ayer as the critical slip surface

and four steep joint sets causing wedge failures. (2) The collapse was triggered by rainfall reducing interlayer cohesion by 40% and increasing pore pressure

compounded by surrounding building loads. Based on rock strength (FRK=40.7 MPa)

an anchor spacing model was developed (theoretical 7.6 m

optimized to 2.0 m). (3) The implemented treatment measures

including debris removal

φ25 anchors

a C30 concrete panel and 2 m-spaced drainage holes

reduced pore water pressure by 35% and achieved full slope stability with no further deformation observed. Future work should establish a multi-source automated monitoring system to enable real-time risk warning

关键词

Keywords

references

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