层间错动带的工程特性及对边坡稳定性的影响研究  

Research on the Engineering Characteristics of Strain-slipzoneinlayers and the Affection of Weak Seam to Slope Stability

作　　者：王维早[1] 于开宁[1] 王滨[1] 杨涛[1] 王华明[2] 

机构地区：[1]石家庄经济学院工程学院,石家庄050031 [2]河北建设勘察研究院有限公司,石家庄050031

出　　处：《工程勘察》2007年第10期5-10,23,共7页Geotechnical Investigation & Surveying

摘　　要：西南某大型水电站左岸坝肩边坡层间错动带(EP)特别发育,分布广,出露范围小,绝大部分埋藏在地下,这就给研究带来了巨大的困难。本文从EP的空间展布、EP的成因、EP的工程分类、EP的强度参数取值等因素进行分析,从这些方面可以看出,EP可能构成该边坡潜在的滑动面,对该边坡的稳定性影响很大。本文又从该边坡的整体稳定性和边坡拱间槽开挖后形成的不稳定块体两个方面进行了分析,可以看出EP构成该边坡潜在的滑动面,但是该边坡整体是稳定的,EP对块体稳定性的影响是比较大的。本文分析了块体的形状、块体的稳定计算方法,通过计算,最后给出了该边坡拱间槽开挖后的不稳定块体。There are many strain-slipzoneinlayers （EP） existed in the slope of the left dam abutment, where the （EP） distributes widely and exposure in small scale. Most of the EP entirely imbed underground, which bring tremendous problems to the research. The spacing distribution, the cause of formation, the engineering classification and the mechanical property of the EP are analyzed. The EP may form the latent sliding surface to the slope from above aspects and the weak seams greatly affect the stability of the slope. The integrated stability of the slope and the instability blocks formed in the excavation of the slope are discussed. The EP probably forms the latent sliding surface, but the slope is stable, The EP is the important factor to the stability of the blocks, and the shape of the blocks and the calculation method for the stability of the blocks are discussed.

关 键 词：边坡 层间错动带(EP) 块体 稳定性 

分 类 号：P642.2[天文地球—工程地质学]