兰临高速公路袁家湾段切坡开挖失稳过程及其机理  

PROCESS AND MECHANISM OF CUT SLOPE INSTABLITY AT YUANJIAWAN SECTION OF LAN-LIN EXPRESSWAY

作　　者：张帆宇[1] 白世彪[2] 刘高[1] 谌文武[1] 韩文峰[1,3] 

机构地区：[1]兰州大学土木工程与力学学院,兰州730000 [2]南京师范大学地理科学学院,南京210097 [3]天津城市建筑学院,天津300381

出　　处：《工程地质学报》2009年第1期81-87,共7页Journal of Engineering Geology

基　　金：西部交通科技建设项目(200231800036);国家青年基金项目(编号:40801212)

摘　　要：袁家湾滑坡受人类活动控制和影响非常典型,在新构造活动以及褶皱构造和断裂构造较强烈的影响下,发育于结构松散破碎、表层风化严重的砂砾岩夹泥岩的顺倾岩层中,本文以滑坡的工程地质分析为主,结合FLAC3D数值模拟,分析了边坡在复杂的自然环境下和人类活动改造过程中的重复性、继承性、相似性和增大性的滑动特征,以及在人类改造形式下的独立性和多样性的破坏形式,揭示该滑坡伴随着人类的切坡开挖破坏逐渐加深加大,逐步向自然状态协调发展的演化过程。The instability of a cut slope at Yuanjiawan section of Lan - Lin expressway is typically controlled and influenced by human activities, under the influence of obvious neotectonie movement, strong fold and fault structures, formed in dip bedded sandy conglomerate intercalated with shale of broken loose structure and serious surface weathering. The paper employs the analysis methods of engineering geology combined with Flac3D numerical simulation and analyses the sliding characteristics of repetition, succession, similarity and gradual increase, as well as the damaged form of independency and variety, because of a variety of the transformation forms of the human activities. The results show that the instability is characterised by evolutional process of continuously increasing damaged scale at the cut slope by human beings and gradually developed to the present natural state.

关 键 词：人类活动 失稳过程 演化机理 袁家湾滑坡 兰临高速公路 

分 类 号：TD824.7[矿业工程—煤矿开采]