高陡层状土质边坡风蚀失稳过程及机理研究  

INSTABLITY PROCESS AND MECHANISM OF STEEP SLOPE COMPRISING LAYERED SOILS DUE TO WIND EROSION

作　　者：崔凯[1,2,3] 朱彦鹏[1] 谌文武[2,3] 王旭东[2,3] 韩文峰[2,3] 

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,兰州730050 [2]兰州大学西部灾害与环境力学教育部重点实验室,兰州730000 [3]国家古代壁画保护工程技术研究中心,敦煌736200

出　　处：《工程地质学报》2011年第2期187-192,共6页Journal of Engineering Geology

基　　金：国家十一五科技支撑计划课题(2006BAK30B02);兰州理工大学博士科研发展基金(BS04200902);古代壁画保护国家文物局重点科研基地开放课题;教育部西部灾害与环境力学重点实验室开放基金(klmwde201006)

摘　　要：吐鲁番交河故城台地高陡层状土质边坡的失稳过程受风蚀控制和影响非常典型;在土层组合特征和抗风蚀能力差异以及当地终年多大风的气候特征的共同作用下,坡体土层形成风蚀空腔并在空腔的控制下发生变形破坏。以工程地质定性分析、风洞实验、物理模拟为主要手段,结合数值模拟,分析了该边坡在自然风蚀改造过程中表现出具有特殊性、多样性和阶段性特征的失稳过程,验证了边坡风蚀空腔形成与发展的存在性,揭示了边坡在风蚀失稳过程中的客观存在的差异风蚀和外挑块体变形破坏机理,为防治和监测此类边坡的变形破坏提供了有益的参考。It is very typical that wind erosion controls and influences the instability process of steep slope comprising layered soils at the mesa of Jiaohe Ruins in Turpan.Wind erosion caverns can be formed in the layered slope soils.They can further cause the slope to deform and failure.They are typically formed in the slopes with low anti-wind erosion capacity and together with the local climate characteristic of frequent gales.The paper employs the methods of engineering geology,experiment of wind tunnel,physical simulation and numerical simulation to analyze the slope instablity characteristics in terms of particularity,diversity and stages.It further validates the presence of forming and developing wind erosion caverns.It reveals the mechanism of differential wind erosions and deformation and failure mechanism of suspended soil masses.It provides some useful references for the controlling and monitoring of the deformation and failure in such steep slopes.

关 键 词：层状 高陡土质边坡 风蚀 失稳过程 机理 

分 类 号：TU457[建筑科学—岩土工程]