|Table of Contents|

Numerical Simulation of Stability of High and Steep Rock Slope in Karst Development Region with BIM Technology(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年05期
Page:
274-283
Research Field:
基础工程
Publishing date:

Info

Title:
Numerical Simulation of Stability of High and Steep Rock Slope in Karst Development Region with BIM Technology
Author(s):
LIU Jun-li1;  LIAO Heng-bin1;  ZHANG Bing-hui1; 2
(1. College of Civil and Engineering and Architecture, Guilin University of Technology, Guilin 541004, Guangxi, China; 2. Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China)
Keywords:
karst development region;  high and steep rock slope;  BIM;  finite element analysis
PACS:
U417
DOI:
10.19815/j.jace.2021.06063
Abstract:
In order to solve the problem that special geological conditions such as high and steep rock slopes in karst development region couldn't be visualized, and the numerical simulation model didn't match the actual situation in the slope stability analysis under complex geological conditions, and the analysis results were not accurate enough, a solution method was proposed to use BIM technology to model the high and steep rock slopes in the karst development area, and to comparatively verify and analyze by the variety of finite element methods. Taking the K5+420-K5+740 section of the Xing'an-Yangshuo highway extension project in Guilin city as the engineering background, the data such as rock and soil strength parameters were obtained through geological survey, drilling TV, stereographic projection and sampling experiments. The hybrid modeling method combining borehole modeling and profile modeling was adopted to create the BIM three-dimensional digital geological model of the slope. The refined BIM model was cut into the most unfavorable section through Boolean operation, and imported into the finite element analysis software without damage, and through the finite element analysis method and Morgenstern-Price method to analyze the stability and instability process of the section of slope engineering from natural conditions to support and reinforcement conditions. Through the comparison and verification of the two methods, the calculation efficiency and accuracy of the finite element analysis method were improved. At the same time, the safety factor, displacement and strain cloud of the slope under various working conditions were analyzed, the causes of instability and failure of the slope under natural working conditions were found out, and the checking calculation was carried out after support. The results show that by constructing the three-dimensional geological model and combining the finite element analysis method to analyze the slope stability under the complex geological conditions, the safety factor reaches the stability standard. The study improves the efficiency of slope engineering and provides technical support and scientific basis for the design and construction of slope engineering.

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Last Update: 2022-09-30