强震条件下双面坡变形破坏机理的振动台物理模拟试验研究

肖锐铧; 许强; 冯文凯; 陈建君; 左雅娅

强震条件下双面坡变形破坏机理的振动台物理模拟试验研究

地质灾害防治与地质环境保护国家重点实验室, 成都理工大学成都 610059

基金项目:

国家重点基础研究发展计划课题(2008CB425801)、地质灾害防治与地质环境保护国家重点实验室科技减灾、重建家园专项基金（DZJK0811）联合资助

详细信息

作者简介:
肖锐铧,工程地质专业.Email：xiaoruihua0316@126.com

中图分类号: P642
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出版历程
- 收稿日期: 2009-11-18
- 修回日期: 2010-04-08
- 刊出日期: 2010-12-25

SHAKING TABLE SIMULATION EXPERIMENT ON DEFORMATIONFAILURE MECHANISM OF DOUBLESIDES SLOPE IN CONDITION OF INTENSE EARTHQUAKE

National Key Laboratory of Geohazard Prevetion and Geoenviroment Protection,Chengdu University of Technology,Chengdu 610059

摘要

摘要: 512汶川地震引发了数以万计的崩塌、滑坡、泥石流等地质灾害。为了研究双面坡在强震条件下的动力响应规律,本文在大量野外调查的基础上,采用振动台物理模拟试验手段,设计完成了四类11个模型试验,从改变模型的坡度和坡顶宽度、软岩硬岩结合、阶梯状坡形等角度,较系统地研究了双面坡在强震作用下的响应规律。试验结果显示：强震条件下地震水平惯性力是导致边坡破坏的主要原因；在地震情况下边坡变形破坏表现出明显的初动破坏效应；振动过程中双坡具有明显的共剪效应,坡面为阶梯状时其共剪效应更明显；坡体结构为上软下硬时下部硬岩对振动具有一定的放大效应,上硬下软时坡体易整体偏移产生变形破坏。试验结论与实际情况基本符合。
- 强震区 /
- 双面坡 /
- 振动台 /
- 物理模拟
Abstract: 512 Wenchuan earthquake triggered thousands of rockcollapses,landslides,debris flows and other geological disasters. In order to study the response of the doublesides slope to the earthquake,we designed a total of 11 models according to the field investigation. We took four factors into consideration to study the seismic response of the slope. The four factors are the slopedegree,the top width of slope,structure combination and the shape of the doublesides slope. The tests manifested that (a)seismic inertia force is the main factor that results in slope failure; (b)the deformation and failure of the slope has a relation to the initial seismic direction; (c)the doublesides slope shows an conjugatedshear phenomenon; (d)different structure combinations of slopes result in different failure modes; e)the conjugatedshear phenomenon is more obvious on the laddershaped doublesides slope. The test findings are well in line with the results of field investigation．
- Earthquake zone /
- Double sides slope /
- Shaking table /
- Physical modeling

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参考文献(1)

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