贵阳地铁2号线马王庙站北侧边坡危岩稳定性及失稳特征研究
贺建军张羽军
Stability and Instability Characteristics of Perilous Rock Mass on the North Side Slope of Mawangmiao Station of Guiyang Metro Line 2
HE JianjunZhang Yujun
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作者信息:中铁二院工程集团有限责任公司， 610031， 成都∥第一作者， 工程师
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Affiliation:China Railway Eryuan Engineering Group Co., Ltd., 610031, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.04.028
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中图分类号/CLCN:U213.1+3
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栏目/Col:研究报告
摘要:
贵阳地铁2号线马王庙站北侧废弃采石场高边坡，坡顶陡坎分布较多裂隙，坡面存在大量危岩落石，对拟建车站及附属设施的安全性有一定影响。针对此边坡，在详细调查测量的基础上，分析其形成的主要原因和控制因素，通过极射赤平投影法对其稳定性作出初步判断，并采用静力分析法计算极端工况下边坡危岩的稳定性，通过数值模拟软件分析其失稳后的运动特征。由分析计算结果可知，马王庙站北侧的边坡危岩落石在极端工况下处于不稳定状态，计算得到的落石失稳后理论落点距地铁车站附属结构极近，给地铁及附属设施带来了安全隐患。针对不同高程的落石提出了工程治理措施。
Abstracts:
The high slope of the abandoned quarry on the north side of Mawangmiao Station of Guiyang Metro Line 2 is extremely steep, and is covered with huge amount of cracks and perilous rock mass, causing certain degree of impact on the safety of the planned station and its ancillary facilities. Targeting this slope, based on detailed investigation and measurement, the main causes and control factors of the formation are analyzed. The slope stability is preliminarily judged by stereographic projection method. And the slope stability under extreme working conditions is calculated by static analysis method. The movement characteristics of the slope after instability are analyzed by numerical simulation software. From analysis calculation results, it is concluded that the perilous rock mass on Mawangmiao Station north side slope are unstable under extreme working conditions. The calculated theoretical rockfall position after instability is very close to the ancillary structures of the metro station, bringing safety hazards to metro and the ancillary facilities. Engineering treatment measures are proposed for rockfalls at different heights.
引文 / Ref:
贺建军, 张羽军. 贵阳地铁2号线马王庙站北侧边坡危岩稳定性及失稳特征研究. 城市轨道交通研究, 2022, 25(4): 132.
HE Jianjun, Zhang Yujun. Stability and instability characteristics of perilous rock mass on the north side slope of mawangmiao station of guiyang metro line 2. Urban Mass Transit, 2022, 25(4): 132.
HE Jianjun, Zhang Yujun. Stability and instability characteristics of perilous rock mass on the north side slope of mawangmiao station of guiyang metro line 2. Urban Mass Transit, 2022, 25(4): 132.
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