摘要
横向坡是岩层走向与坡面走向垂直,天然状态下整体稳定性较好的一种坡型,通过汶川大地震灾区大型滑坡调查发现在强震作用下横向坡失稳模式为拉裂—溃滑型。研究结果表明,以平武县新坪村滑坡为例,横向坡在强震作用下,斜坡后缘界面处出现拉应力,拉裂缝不断加深,坡体下部也因垂向和水平震动出现张剪性破坏,从而形成统一滑面,溃裂的坡体随之似"散粒体"溃散、滑动下来,冲过坡体前缘农家,造成9名村民死亡,进入郑家沟受到对面山体阻挡后震荡堆积形成堰塞湖。本研究在一定意义上更新了对横向坡稳定性评价的传统观念。
Horizon slope is strata towards the slope strike vertical which is a good overall stability slope under natural state,In large-scale earthquake disaster areas of Wenchun County,it could found that instability model of horizontal slope under intensive earthquake are tension-crushing by large landslide survey.Instability mode is tension—trushing slippery under intensive earthquake.Based on Xinping village,Pingwu County landslide as an example,slope edge at the interface between tensile stress appears under the intensive earthquake,and the cracks apper unceasingly deepened,lower slope body appears stretch shear destruction because of the vertical and horizontal vibration,thus forming a uniform sliding surface,the crushing slippery slope body then cracks and slides down as ＂granular mixture＂ which rushes to slope bottom margin of peasant caused 9 villagers deaths,and it enters Zhengjia ditch blocked by the opposite mountain,then it moves like post-concussion and forms a barrier lake.These achievements are update in a certain sense to the traditional concept of stability evaluation of the horizontal slope.
出处
《水土保持通报》
CSCD
北大核心
2011年第6期117-120,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"基于地震岩崩边坡滚石运动特征研究"(40972195)
关键词
横向坡
强震
拉裂—溃滑型
散粒体
horizon slope
intensive earthquake
tension-crushing
granular mixture
作者简介
作者简介：裴钻（1980-），男（汉族），四川省达州人，博士研究生，讲师，主要从事工程地质勘察与地质灾害方面研究。E—mail：27825683@qq．com。
