路堑边坡失稳机理及其治理措施——以桂武高速K175+300～600段为例
Mechanism of Instability of Road Cutting Slopes and Its Control Measures:Taking the K175+300～600 Section of Guiwu Expressway as an Example
宋朝辉 1李鹏举 1张艺潆2
作者信息
- 1. 华北水利水电大学地球科学与工程学院,郑州 450046;河南省岩土工程与水工结构研究院,郑州 450046
- 2. 华北水利水电大学地球科学与工程学院,郑州 450046
- 折叠
摘要
以桂武高速路堑边坡为例,基于现场调查和数值模拟分析,剖析了该边坡失稳的机理,提出了改进的治理措施.研究结果表明,边坡处于古滑坡上,坡体为极软岩;路堑边坡开挖形成临空面,前缘屈服,渐进向后缘发展,诱发失稳;初始抗滑结构嵌岩深度不够,部分抗滑桩倾覆.遂将边坡设置为两级坡,采用双排桩+冠梁+预应力锚索联合加固,数值计算边坡安全系数为 1.277,处理后边坡趋于稳定.研究可为同类基础设施建设提供一定参考.
Abstract
Taking the slope of the Guiwu Expressway as an example,based on on-site investigation and numerical simulation analysis,the mechanism of instability of the slope was analyzed,and improved treatment measures were proposed.The research results indicate that the slope is located on an ancient landslide,and the slope body is extremely soft rock.The excavation of the road cut slope forms a free face,with the front edge yielding and gradually developing towards the back edge,inducing instability.The initial antislip structure is not deeply embedded in the rock,and some antislip piles overturned.So the slope is set as a two-level slope and reinforced with a combination of double row piles,crown beams,and prestressed anchor cables.The safety factor of the slope is numerically calculated to be 1.277,and after treatment,the slope tended to stabilize.Research can provide certain references for similar infrastructure construction.
关键词
路堑边坡/失稳机理/治理措施/数值模拟/古滑坡Key words
cutting slope/instability mechanism/governance measures/numerical simulation/ancient landslide引用本文复制引用
出版年
2024
NETL
NSTL
万方数据