三峡库区侏罗系不同类型结构面抗剪强度对比  

Comparison study on shear strength parameters of Jurassic different rock discontinuities in Three Gorges Reservoir region

作　　者：王姣[1] 李长冬[1] 雍睿[1] 梁德明[1] 

机构地区：[1]中国地质大学,湖北武汉430074

出　　处：《煤田地质与勘探》2014年第5期61-66,共6页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41202198);中央高校基本科研业务费专项资金"摇篮计划"资助(CUG130409);国家重点基础研究发展计划(973计划)项目(2011CB710604);中国地质大学(武汉)试验室开放基金(SKJ2012141)

摘　　要：三峡库区侏罗系是典型的软硬相间地层,其软弱层具有亲水性强、透水性弱等特殊的工程地质特性,是库区常见的易滑地层。选取三峡库区秭归县马家沟滑坡所处地层岩体结构面为研究对象,采用室内岩体结构面直剪试验,对4种不同类型结构面的力学特性进行了研究。通过对试验数据的统计分析,绘制了各种结构面的剪应力–正应力关系曲线图及剪应力–剪切位移关系曲线图,从而获得了形成于同一地层中的4种不同结构面的抗剪强度参数,并对其剪切特性进行对比分析与研究。以结构面直剪试验结果为依据,初步分析了该地区某一典型边坡的稳定性及潜在滑动层面,为后期边坡的稳定性评价提供可靠性基础参数。The Jurassic formation in Three Gorges Reservoir is typical of soft-hard alternating strata, which has its special engineering geological characteristics such as strong hydrophilicity, weak permeability. This paper selects four different kinds of structural plane for the study, and has carried out the basic research on its mechanical properties by different normal stress indoor direct shear test. Through statistical analysis of test data, shear-normal relationship graph and stress-shear displacement relationship curves of various kinds of structural plane under the effect of different normal stress were drown, four different shear strength parameters of the structure were obtained. shear characteristics were studied, Then we can give the preliminary judgment about instability plane in slope, and provide reliable reference for the later slope stability evaluation.

关 键 词：侏罗系 结构面 直剪试验 抗剪强度 稳定性 

分 类 号：TU452[建筑科学—岩土工程]