江苏省宜兴地区碎石土滑坡地质灾害特征及防治措施研究  

Study on geological disaster characteristics and prevention measures of debris landslide in Yixing area of Jiangsu

作　　者：张纪星 宋京雷 刘洪[1] 王亚山[1] 刘宝生 ZHANG Jixing;SONG Jinglei;LIU Hong;WANG Yashan;LIU Baosheng(Geological Survey of Jiangsu Province,Nanjing 210018,China)

机构地区：[1]江苏省地质调查研究院,南京210018

出　　处：《世界地质》2024年第3期452-461,共10页World Geology

基　　金：江苏省科技计划专项资金(BE2023796);江苏省自然资源科技创新项目(苏财资环[2024]35号)。

摘　　要：针对江苏省宜兴地区典型碎石土滑坡地质灾害,开展了滑坡地质灾害特征分析和防治措施研究。结果表明,碎石土滑坡主要发育于宜兴南部山区山前缓坡地带,自然边坡坡度不大于15°;滑坡体具有上土下岩的二元结构特征,滑坡破坏模式为后退式渐进整体变形破坏的牵引式滑坡,表现为地形改造+降雨诱发;滑坡体轴向水平距离为改造后边坡前缘高差的10.0~12.0倍。采用坡面修整、抗滑桩、回填压脚、挡土墙和截排水沟等综合防治措施可有效消除滑坡地质灾害隐患,坡体水平位移、垂直位移收敛于定值,坡体稳定。Aiming at the typical geological disasters of debris landslide in Yixing area,Jiangsu Province,the basic characteristics of debris landslide are analyzed,and the reliability of the prevention measures are verified through some examples.The results show that the debris landslides in Yixing area are mainly occurred in the piedmont gentle slope area of southern mountains.The gradient is below 15°of natural slope.The landslide body has the dual structure characteristics of upper soil and lower rock.The landslide is a retrogressive landslide with retrusive and progressive general deformation failure which shows as topography reform and rainfall induction.The axial horizontal distance of the landslide body is 10.0 to 12.0 times of the altitude difference of the cutting slope.Through comprehensive measures such as repairing slope surface,anti-slide pile,backfilling and presser foot,retaining wall,and drainage ditch,the potential hazard of landslide is eliminated,the horizontal displacement and vertical displacement of the slope converges to a fixed value,and the slope is stable.

关 键 词：碎石土滑坡 山前缓坡地带 牵引式滑坡 稳定性 防治措施 宜兴地区 

分 类 号：P642.22[天文地球—工程地质学]