[1]张京城,吴波,刘聪.高速公路改扩建边坡安全风险评估及强降雨稳定性研究[J].福建理工大学学报,2024,22(06):511-519.[doi:10.3969/j.issn.2097-3853.2024.06.001]
 ZHANG Jingcheng,WU Bo,LIU Cong.Safety-risk assessment and heavy rainfall stability of reconstructed and expanded highway slopes[J].Journal of Fujian University of Technology;,2024,22(06):511-519.[doi:10.3969/j.issn.2097-3853.2024.06.001]
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高速公路改扩建边坡安全风险评估及强降雨稳定性研究
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《福建理工大学学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第22卷
期数:
2024年06期
页码:
511-519
栏目:
出版日期:
2024-12-25

文章信息/Info

Title:
Safety-risk assessment and heavy rainfall stability of reconstructed and expanded highway slopes
作者:
张京城吴波刘聪
东华理工大学
Author(s):
ZHANG Jingcheng WU Bo LIU Cong
School of Civil and Architectural Engineering, East China University of Technology
关键词:
高速公路边坡风险评估边坡稳定性分析
Keywords:
highwaysloperisk assessmentslope stability analysis
分类号:
U416.14
DOI:
10.3969/j.issn.2097-3853.2024.06.001
文献标志码:
A
摘要:
为探讨高速公路改扩建边坡安全风险,量化降雨入渗对不同状态下改扩建高边坡工程影响,依托吉康高速改扩建项目某7级边坡工程,建立一种基于层次分析法-反熵权法的高速公路边坡风险评估体系,运用模糊综合评价得出原边坡为基本稳定状态,二次开挖后降低为不稳定状态,采取框格锚杆加固后该边坡稳定性提升至基本稳定状态。不同阶段改扩建边坡稳定性及其表面水平位移阈值均随降雨强度、降雨时长的提升而降低,二次开挖扰动后处于未支护状态下边坡失稳风险最高,原边坡、改扩建未加固、改扩建加固后安全系数分别为1.093、0.637、1.313,比降雨前分别降低6.74%,27.34%,17.31%。
Abstract:
This research aims to explore the safety risks associated with the expansion and reconstruction of highway slopes, and to quantify the impact of rainfall infiltration on different states of expanded high slope projects. A risk assessment system for highway slopes was established based on the AHP-AEW method. This system was applied to a Grade-7 slope project in Jikang Highway expansion. The fuzzy comprehensive evaluation shows the original slope was basically stable, which was downgraded to an unstable state after secondary excavation, but returned to an basically stable state with the reinforcement of frame anchors. The stability of the slope and its threshold horizontal displacements at different stages of reconstruction decreased with increasing rainfall intensity and duration. After the disturbance from secondary excavation, the slope in its unsupported state exhibited the highest risk of instability. The safety factors for the original slope, the unreinforced expanded slope, and the reinforced expanded slope were 1.093, 0.637, and 1.313, respectively, showing decreases of 6.74%, 27.34%, and 17.31% compared to pre-rainfall conditions.

参考文献/References:

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更新日期/Last Update: 2024-12-25