降雨和地震作用下碎石土边坡稳定性及支护方式研究
发布时间：2018-09-07 06:53
【摘要】：依托四川省汶川至九寨沟段高速公路第06标段(川主寺至九寨沟段)边坡工程,采用FLAC软件模拟,考虑降雨与地震作用,以水平位移、塑性区和滑移面为边坡失稳评价指标,研究了高海拔、高烈度地区碎石土边坡在降雨及降雨-地震共同作用这两种工况下支护前后的稳定性,提出了合理的支护方案。结果表明:强降雨导致的边坡浅层面溜滑主要发生在黏土与碎石土交界面处,滑动面为平面型,采用锚杆框架梁支护可保证边坡稳定;降雨-地震共同作用下边坡的破坏范围扩大,碎石土边坡沿土体内部约12 m深处出现圆弧型滑动面,主要发生在黏土与碎石土交界面处,采用复合抗滑桩和锚杆框架梁组合支护方式可以保证边坡稳定。
[Abstract]:Based on the slope engineering of the No. 06 section of the expressway between Wenchuan and Jiuzhaigou in Sichuan Province, this paper uses FLAC software to simulate and consider rainfall and earthquake, taking horizontal displacement, plastic zone and slip surface as the evaluation indexes of slope instability. The stability of gravel slope in high altitude and high intensity area before and after supporting under the two conditions of rainfall and rainfall-earthquake is studied and a reasonable supporting scheme is put forward. The results show that the slip of shallow surface of slope caused by heavy rainfall mainly occurs at the interface between clay and gravel, and the sliding surface is plane type, and the slope stability can be guaranteed by using anchor frame beam support. Under the combined action of rainfall and earthquake, the failure range of the slope is enlarged, and the slope of gravel soil appears arc sliding surface along the depth of about 12 m inside the soil, which mainly occurs at the interface between clay and gravel soil. The slope stability can be guaranteed by composite anti-slide pile and anchor frame beam combined support.
【作者单位】： 北京工业大学建筑工程学院;
【基金】：国家自然科学基金项目(41572276)
【分类号】：U416.14
[Abstract]:Based on the slope engineering of the No. 06 section of the expressway between Wenchuan and Jiuzhaigou in Sichuan Province, this paper uses FLAC software to simulate and consider rainfall and earthquake, taking horizontal displacement, plastic zone and slip surface as the evaluation indexes of slope instability. The stability of gravel slope in high altitude and high intensity area before and after supporting under the two conditions of rainfall and rainfall-earthquake is studied and a reasonable supporting scheme is put forward. The results show that the slip of shallow surface of slope caused by heavy rainfall mainly occurs at the interface between clay and gravel, and the sliding surface is plane type, and the slope stability can be guaranteed by using anchor frame beam support. Under the combined action of rainfall and earthquake, the failure range of the slope is enlarged, and the slope of gravel soil appears arc sliding surface along the depth of about 12 m inside the soil, which mainly occurs at the interface between clay and gravel soil. The slope stability can be guaranteed by composite anti-slide pile and anchor frame beam combined support.
【作者单位】： 北京工业大学建筑工程学院;
【基金】：国家自然科学基金项目(41572276)
【分类号】：U416.14
【相似文献】
相关期刊论文 前6条
1 李鸿猷;;地震作用下无铰拱位移计算表[J];中南公路工程;1978年02期
2 张媛;范蓓蓓;阮东华;;列车-地震作用下桥梁结构的动力分析[J];青岛大学学报(工程技术版);2014年02期
3 贾存兴;;地震作用下某公路古滑坡稳定性的有限元分析[J];华东公路;2012年04期
4 曲昭加;管道支架地震作用的分析及计算[J];特种结构;1995年01期
5 崔丽丽;隋大权;;城市桥梁在地震作用下碰撞的控制研究[J];低温建筑技术;2009年04期
6 韩艳;夏禾;;地震作用下列车过桥安全性分析[J];中国安全科学学报;2006年07期
相关会议论文 前2条
1 陈英俊;;桥上列车在地震作用下的运行安全性[A];工程安全及耐久性——中国土木工程学会第九届年会论文集[C];2000年
2 梁，
本文编号：2227520
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2227520.html
