| 软硬岩互层边坡崩塌机理及治理对策研究 |
| |
| 引用本文： | 胡斌,黄润秋.软硬岩互层边坡崩塌机理及治理对策研究[J].工程地质学报(英文版),2009,17(2):200-205. |
| |
| 作者姓名： | 胡斌 黄润秋 |
| |
| 作者单位： | 成都理工大学地质灾害防治与环境保护国家重点实验室 成都 610059 |
| |
| 摘 要： | 崩塌是红层地区软硬互层型边坡的主要工程地质问题之一。本文以西南地区某公路边坡为例，在边坡地质结构特征调查的基础上，分析了砂泥岩互层边坡崩塌形成机理，采用二维有限元方法研究了崩塌后上部凹腔岩体的变形破坏模式，并采用基于强度理论的稳定性评价方法研究了其稳定性。结果表明，崩塌的形成主要是由于差异风化在下部软岩部位形成凹腔，导致上部硬岩产生拉裂并逐渐贯通；若不及时治理，上部岩体中结构面贯通至60%时，可能产生坠落失稳。综合分析边坡稳定性状况及变形破坏演化模式，采用清坡+局部削坡+挂网喷混凝土+钢筋混凝土支撑柱+排水的治理方案，重点控制凹腔以上岩体中拉裂的发展并做好防、排水工作。
|
| 关 键 词： | 崩塌 形成机理 稳定性评价 治理对策 支撑柱 |
COLLAPSE MECHANISM AND TREATMENT MEASURES OF SLOPES WITH INTERBEDDINGS OF SOFT AND HARD ROCKS |
| |
| HU Bin,HUANG Runqiu.COLLAPSE MECHANISM AND TREATMENT MEASURES OF SLOPES WITH INTERBEDDINGS OF SOFT AND HARD ROCKS[J].Journal of Engineering Geology,2009,17(2):200-205. |
| |
| Authors: | HU Bin HUANG Runqiu |
| |
| Institution: | State Key Laboratory of GeoHazard Prevention and GeoEnvironment Protection, Chengdu University of Technology, |Chengdu 〖KG1〗610059 |
| |
| Abstract: | Slope collapse is the primary problem of geological projects in slopes with interbeddings of soft and hard rocks in red bedrock area. This paper examines a highway slope in southwest area of China. The collapse mechanism of formation and the characteristics of structure are studied using field investigation. The slope characteristics of failure and deformation after collapse are studied with the nonlinear finite element method of two dimensions. The slope stability is also evaluated with quantitative method. The result shows that owing to the discrepant weathering, the lower soft rock mass has some notch that can cause the collapse and the cracks in the upper hard rock mass. The cracks link up gradually. If it is not stabilized in time, the upper hard rock mass can collapse when the cracks in the hard rock mass link up to 60% in thickness. Based on the comprehensive analysis of the present slope stability and the potential pattern of failure and deformation, the scheme is settled. It includes cleaning slope surface, cutting parts of the slope, hanging the net of reinforcing bar and sprayed concrete, reinforced concrete support column, and drainage system. The focal treatment measure is to control the development of the cracks in the upper rock mass above the notchand to make waterproof and drain establishment. |
| |
| Keywords: | |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
