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

卷:

39卷

期数:

2022年05期

页码:

274-283

栏目:

基础工程

出版日期:

2022-09-30

文章信息/Info

Title:

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

文章编号:

1673-2049(2022)05-0274-10

作者:

刘均利¹,廖恒彬¹,张炳辉^1,2

(1. 桂林理工大学 土木与建筑工程学院,广西 桂林 541004; 2. 桂林理工大学 广西岩土力学与工程重点实验室,广西 桂林 541004)

Author(s):

LIU Jun-li¹, LIAO Heng-bin¹, ZHANG Bing-hui^1,2

(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)

关键词:

岩溶发育区;  岩质高陡边坡;  BIM;  有限元分析

Keywords:

karst development region;  high and steep rock slope;  BIM;  finite element analysis

分类号:

U417

DOI:

10.19815/j.jace.2021.06063

文献标志码:

A

摘要:

为解决岩溶发育区岩质高陡边坡研究中特殊地质情况无法可视化表达,以及在复杂地质情况下边坡稳定性分析的数值模拟模型与实际情况不匹配、分析结果不够精确等问题,提出了利用BIM技术对岩溶发育区岩质高陡边坡进行建模并通过多种有限元方法进行对比验证及分析的解决方案。以桂林市兴安至阳朔公路延长线工程K5+420～K5+740段为工程背景,通过地质勘察、钻孔电视、赤平投影和取样试验得到岩土体强度参数等数据,采用钻孔建模与剖面建模相结合的混合建模方法,创建该段边坡BIM三维数字地质模型,将精细化的BIM模型通过布尔运算剖切最不利剖面,无损导入有限元分析软件,并通过有限元分析方法以及摩根斯坦-普拉斯法对该段边坡工程从自然工况到支护加固工况的稳定性及失稳过程进行分析,提高了计算效率和精度。分析了边坡在各种工况下的安全系数、位移及应变云图,查明了边坡在自然工况下易失稳破坏的原因,并进行了支护后再验算。结果表明:在复杂地质情况下构建三维地质模型并结合有限元分析方法进行边坡稳定性分析,其安全系数达到稳定标准; 该研究提高了边坡工程效率,并为边坡工程的设计及施工提供了技术支持和科学依据。

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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备注/Memo

备注/Memo:

收稿日期:2021-06-21
基金项目:国家自然科学基金项目(52068016); 广西科技计划项目(2020GXNSFAA297118)
作者简介:刘均利(1978-),男,山东泰安人,副教授,工学博士,E-mail:417214056@qq.com。

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更新日期/Last Update: 2022-09-30