堆积体陡斜坡路基滑坡机制及其处治对策  

Mechanism and Treatment of Subgrade Landslide on Accumulation Body Steep Slope

作　　者：冯玉涛 牟海峰 周小平[1] 龚业超 杨海清[1] FENG Yutao;MU Haifeng;ZHOU Xiaoping;GONG Yechao;YANG Haiqing(School of Civil Engineering, Chongqing University,Chongqing 400045, China;China Railway Changjiang Transport Design Group Co. Ltd, Chongqing 401121, China;Hehai College, Chongqing Jiaotong University, Chongqing 400074, China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]中铁长江交通设计集团有限公司,重庆401121 [3]重庆交通大学河海学院,重庆400074

出　　处：《灾害学》2021年第3期57-59,共3页Journal of Catastrophology

基　　金：重庆市住房与城乡建设委员会科技项目(18KJ16);重庆市交通局交通科技项目(19KJ24)。

摘　　要：堆积体陡斜坡路基作为山区高速公路特殊路基设计的重要内容,受到国内外工程技术人员和相关学者的高度关注。针对山区高速公路堆积体陡斜坡路基病害频发的现状,以国内某山区高速公路典型路段为研究对象,从地形地质条件、路堤填筑、边界内建(构)筑物状态、施工方案与设计文件的差异等方面对堆积体陡斜坡滑坡机制进行了深入的分析和研究。陡斜坡地貌、坡脚临空、人为堆载等是堆积体斜坡失稳的关键因素,地表植被和原始水系的破坏将加速滑坡的形成、加剧致灾程度。针对性的提出了“上部减载、中部封水、下部固脚”的综合处治措施,多年的变形监测表明:该措施经济有效、安全可靠。As an important part of the special subgrade design of mountainous expressway,the steep slope subgrade with accumulation body has attracted great attention by the engineers and scholars at home and abroad.In view of the frequent occurrence of subgrade diseases on steep slope of mountain expressway,taking a typical section of a mountain expressway in China as the research object,the landslide mechanism of steep slope of mountain expressway was deeply analyzed and studied from the aspects of terrain and geological conditions,embankment filling,state of buildings(structures)within the boundary,differences between construction scheme and design documents,etc.Steep slope landform,the free space at the foot of the slope and the artificial heaped load are the key factors for the instability of accumulation slope.The destruction of surface vegetation and original water system will accelerate the formation of landslide and aggravate the degree of disaster.The comprehensive treatment measures of“upper load reduction,middle water sealing and lower fixation”were put forward.Years of deformation monitoring showed that this measure was economical,effective,safe and reliable.

关 键 词：堆积体 陡斜坡路基 滑坡机制 人为堆载 土工生态袋 

分 类 号：U418.55[交通运输工程—道路与铁道工程] P642[天文地球—工程地质学]