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Excavation Deformation Characteristics and Treatment Effect Inspectionof HighRock Slope with Oblique Intersecting Faults—Taking a High Rock Slope in the Southern Shaanxi, China as an Example(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2024年第03期
Page:
400-413
Research Field:
工程地质与环境灾害
Publishing date:

Info

Title:
Excavation Deformation Characteristics and Treatment Effect Inspectionof HighRock Slope with Oblique Intersecting Faults—Taking a High Rock Slope in the Southern Shaanxi, China as an Example
Author(s):
SHI Yu-ling1*;  HOU Ming-jie1;  LI Huai-xin2;  YAN Chang-gen2;  WEN Kui3
(1. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China; 2. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 3. PowerChina Roadbridge Group Co., Ltd., Beijing 100160, China)
Keywords:
fault;  high rock slope;  slope prevention and control;  failuremechanism;  numerical simulation;  deformation characteristic;  treatmentevaluation;  Shaanxi
PACS:
P642
DOI:
10.19814/j.jese.2024.02018
Abstract:
To elucidate the deformation characteristics during excavationof high rock slopes with oblique intersecting faultsand the subsequent time-dependent behaviourafter slope treatment,thecomprehensive case study on a high rock slope with faults in the southern Shaanxiwas conducted.The on-site surveys, numerical simulations, and multi-point displacement monitoring methodswere employedto analyze the failure mechanisms inherent to high rock slopes with oblique intersecting faults,the primary disaster-inducing factors associated with these slopeswere summarized, and the deformation characteristicsduringexcavation processwere analyzed, andthe effectiveness of remedial measures for mitigating issues in high rock slopes with oblique intersecting faultswas discussed. The resultsshowthat the study area has steep terrain and is influenced by faults and excavation at the foot of the slope, exhibiting typical overhanging terrain features, and geological structure affects the degree of exposed rock breakage and joint development. Numerical simulation demonstrates the feasibility of using an “anchor cable reinforces the upper slope + brushing the middle slope + anchor cable and anti-slide pile reinforces the slope foot” plan for high rock slopes with oblique intersecting faults. Combined with on-sitesurveysand monitoring data, it is evident that the slope stabilization treatment has a significant effect. The soil erosion effect at the fault site is substantial, and heavy rainfall has initiated a collapse issue on the platform nearback edge fault of high rock slope.However, by implementing drainage measures near the fault and the base of the slope, the slopedisasterare effectively mitigated while overall deformation ratesare effectively contained. The research results have important reference value for thetreatmentof high rock slopes with oblique intersecting faults and the analysis of their failure mechanisms.

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Last Update: 2024-05-30