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[1]冯忠居,李德,江冠,等.基于可靠度理论的高边坡二次开挖稳定性分析*[J].中国安全生产科学技术,2023,19(8):130-136.[doi:10.11731/j.issn.1673-193x.2023.08.019]
　FENG Zhongju,Li De,JIANG Guan,et al.Stability analysis on of secondary excavation of high slope based on reliability theory[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(8):130-136.[doi:10.11731/j.issn.1673-193x.2023.08.019]
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基于可靠度理论的高边坡二次开挖稳定性分析*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年8期
页码:
130-136
栏目:
职业安全卫生管理与技术
出版日期:
2023-08-31

文章信息/Info

Title:
Stability analysis on of secondary excavation of high slope based on reliability theory
文章编号:
1673-193X(2023)-08-0130-07
作者:
冯忠居1; 李德1; 江冠2; 赵瑞欣1; 王伟1; 于翔3
（1.长安大学 公路学院，陕西 西安 710064；
2.商洛学院 城乡规划与建筑工程学院，陕西 商洛 726000；
3.大连理工大学 土木工程学院，辽宁 大连 116068）
Author(s):
FENG Zhongju1;  Li De1;  JIANG Guan2;  ZHAO Ruixin1;  WANG Wei1 ;  YU Xiang3
(1.School of Highway,Chang’an University,Xi’an Shaanxi 710064,China;
2.School of Urban and Rural Planning and Architectural Engineering,ShangLuo University,Shangluo Shaanxi 726000,China；
3.School of Civil Engineering,Dalian University of Technology,Dalian Liaoning 116068,China)
关键词:
边坡工程; 稳定性; 二元指标; 现场监测
Keywords:
slope engineering;  stability;  binary index;  field monitoring
分类号:
X936；X947
DOI:
10.11731/j.issn.1673-193x.2023.08.019
文献标志码:
A
摘要:
为研究岩质高边坡开挖全过程动态稳定性问题，依托京沪高速公路改扩建工程，采用FLAC3D分析边坡开挖全过程的变形机理，结合Geo-studio研究边坡开挖各阶段的破坏概率变化规律，提出1种以稳定系数Fs和破坏概率Pf为指标判断边坡开挖稳定性的二元评价方法，综合评估边坡开挖各阶段的稳定性。研究结果表明：边坡开挖与锚杆拆除对边坡稳定性影响显著，其中三级坡面开挖后边坡稳定系数和破坏概率变化幅度最大，稳定系数减幅可达28.8%，破坏概率由4.0%增至10.1%，对开挖后的各级边坡进行支护，边坡稳定系数显著增大，稳定系数增幅可达43.7%；基于蒙特卡洛法建立的二元评价法，能表征边坡开挖全过程稳定性，现场监测证明二元评价方法更具有适用性。研究结果可为类似公路改扩建工程边坡开挖提供一定的指导。
Abstract:
In order to study the dynamic stability in the whole excavation process of high rocky slope,based on the reconstruction and expansion project of Beijing-Shanghai Expressway,the FLAC 3D was used to analyze the deformation mechanism of the whole process of slope excavation,and the Geo-studio was used to study the change law of failure probability in each stage of slope excavation.A binary evaluation method taking stability coefficient Fs and failure probability Pf as indexes to judge the stability of slope excavation was proposed,and the stability at each stage of slope excavation was comprehensively evaluated.The results show that the slope excavation and bolt removal have significant impact on the slope stability.Among them,the slope stability coefficient and failure probability change the most after the excavation of the third grade slope.stability coefficient can be reduced by 28.8%,and the failure probability can be increased from 4.0% to 10.1%.The slope stability coefficient increases significantly after supporting the excavated slopes at all levels,and the stability coefficient can be increased by 43.7%.The binary evaluation method based on Monte-Carlo method can characterize the stability in the whole process of slope excavation,and the field monitoring verifies that the binary evaluation system is more applicable.The results can provide some guidance for the slope excavation of similar highway reconstruction and expansion projects.

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备注/Memo

备注/Memo:
收稿日期： 2022-12-13
* 基金项目： 国家自然科学基金项目（41272285）；山东省交通科技攻关项目(JHLYDKY2)
作者简介： 冯忠居，博士，教授，主要研究方向为公路桥梁与岩土工程。
通信作者： 李德，硕士研究生，主要研究方向为公路桥梁与岩土工程。
更新日期/Last Update: 2023-09-07