坡顶竖向裂缝发育程度对岩质边坡稳定性的影响  

Effect of Development Degree of Vertical Crack on Slope Crest on Stability of Rock Slopes

作　　者：钱闪光[1,4] 李云 侯克鹏[4] 杨志全 Qian Shanguang;Li Yun;Hou Kepeng;Yang Zhiquan(Kunming Metallurgy College Architectural Engineering Faculty, Kunming 650033, China;Kunrning University of Science and Technology School of Public Safety and Emergency Management, Kanrning 650093, China;Kunming Wankun Construction Supervision Co. , Ltd. , Kunming 650041, China;Kunming University of Science and Technology School of Land and Resources Engineering, Kunming 650093, China)

机构地区：[1]昆明冶金高等专科学校建工学院,云南昆明650033 [2]昆明理工大学,公共安全与应急管理学院,云南昆明650093 [3]昆明万昆建设监理有限公司,云南昆明650041 [4]昆明理工大学,国土资源工程学院,云南昆明650093

出　　处：《有色金属设计》2018年第2期18-22,共5页Nonferrous Metals Design

基　　金：昆明冶金高等专科学校基金项目(2016xjzk08);云南省应用基础研究项目资助(2015FB122)

摘　　要：岩质边坡坡顶发育的裂缝对其稳定性具有非常重要的影响。定义了岩质边坡坡顶竖向裂缝的不同发育程度,用λ来表示;并采用数值分析方法分析了其对岩质边坡稳定性的影响。研究结果表明:1)当0≤λ≤0.3时,坡顶竖向裂缝发育程度对岩质边坡稳定性的影响较小,稳定性均接近坡顶无竖向裂缝时的稳定性;2)当0.3<λ<0.8时,坡顶竖向裂缝发育程度越强,岩质边坡的稳定性越低;3)当1≥λ≥0.8时,坡顶竖向裂缝发育程度对岩质边坡稳定性的影响也较小,稳定性均接近λ=0.8时的稳定性。成果不仅可进一步完善裂缝对边坡稳定性影响的研究内容,而且对岩质边坡防治工程的选取与设计具有一定的参考价值。Cracks developed in the crest of rock slopes have very important influence on their stability. Different developmental degree of vertical cracks in the crest of rock slopes is expressed by h. Then the effect on stability of rock slopes is analyzed with numerical analysis method. Research results show that ： 1 ） When 0 ≤ λ ≤ 0.3, developmental degree of vertical crack in the crest of rock slopes has less effect on their stability, and the stability of rock slopes is close to that of rock slopes with no vertical crack （ h = 0） ; 2） When 0. 3 〈 λ 〈 0. 8, developmental degree of vertical crack in the crest of rock slopes is stronger, the stability is lower ; 3 ） When 1 ≥ λ ≥0. 8, developmental degree of vertical crack in the crest of rock slopes also has less effect on their stability, and the stability of rock slopes is close to that of rock slopes with h = 0. 8. Achievements can not only further complete the study on influence of cracks on slope stability, but also serve as reference for the selection and design of control engineering of rock slopes.

关 键 词：岩质边坡 坡顶竖向裂缝 发育程度 稳定性 

分 类 号：TU43[建筑科学—岩土工程]