甘肃徽-成盆地红层工程滑坡特征分析  

Characteristics of engineering landslide in red bed rock area of the Hui-Cheng basin in Gansu province

作　　者：余小龙 安玉科 

机构地区：[1]甘肃省交通规划勘察设计院有限责任公司,甘肃兰州730000

出　　处：《中国地质灾害与防治学报》2015年第3期31-35,64,共6页The Chinese Journal of Geological Hazard and Control

基　　金：西部交通建设科技项目(2009318000102)

摘　　要：通过对甘肃徽成盆地高等级公路建设中工程滑坡的调查分析,归纳总结出徽成盆地红层工程滑坡坡体结构特点、破坏形式、变形破坏机理及过程。徽成盆地红层工程滑坡的主要变形破坏形式是牵引式滑坡,破坏力学机理是堆积层的蠕变-拉裂-蠕滑式破坏,变形破坏过程经历了开挖卸荷蠕变、后缘拉裂、蠕滑破坏形成三个阶段。结合十（堰）天（水）高速K582＋270~490段工程滑坡实例,分析其坡体结构特点、破坏型式、变形破坏机理及过程,发现滑动方向主要受临空面控制,随临空面的变化可发生多层多次异向滑动破坏。最后对徽成盆地红层二元结构工程滑坡治理设计进行深入探讨,并提出经济有效的治理方案。According to the investigation and analysis of the engineering slopes triggered by the construction of the highway at Hui-cheng Basin in Gansu,the Structural characteristics,failure modes and deformation and damage mechanism of slope of red bed rock are extracted and generalized. Tractive landslide is the main deformation and failure type of slope of red bed at Hui-cheng Basin,and creep-pull crack-creep damage of stack layers is the failure mechanism,and the deformation and destruction process have three different phases：Excavation unloading creeping, Trailing edge cracking, Creeping damage forming. Combined With the engineering slope examples at the engineering landslide of K582 ＋ 270 ~ 490 in the highway of Shi YanTian Shui,we analyzed the Structural characteristics,failure modes and deformation and damage mechanism,and found that sliding direction is mainly controlled by the free face and multilayer multiple sliding failure occurs with the change of free face. And depth discussed the treatment design of engineering landslide,at last proposed cost-effective management solution.

关 键 词：徽-成盆地 红层软岩 工程滑坡 变形破坏机制 

分 类 号：P642.22[天文地球—工程地质学]