摘要
宁镇低山丘陵区是突发性滑坡灾害的高易发区和重点防治区。本文以江宁开发区盘山公路降雨型堆积层滑坡为例,根据滑坡灾害调绘和详细勘查,掌握了滑坡的孕灾条件、灾害特征和成因机理。利用Geo-Studio和理正岩土软件定量分析了不同工况下滑坡稳定性和拟设支挡结构受力特征。结果表明:滑坡正处在蠕动变形阶段,罕遇强降雨和人为切坡扰动是诱发滑坡的主要因素,滑坡在天然、降雨和地震工况皆处于不稳定状态,并求取滑坡推力设计值和拟设抗滑桩桩身内力及分布。提出了以抗滑桩板墙+拱形锚杆格构+系统截排水为主的综合治理方案,为宁镇地区同类型滑坡灾害防治提供参考。
The hilly areas of Ningzhen are highly prone to sudden landslide disasters and key prevention and control areas.This article takes the rainfall debris landslide on the Panshan Highway in Jiangning Development Zone as an example,and based on landslide disaster mapping and detailed exploration,grasps the landslide disaster conditions,characteristics,and genesis mechanism.The stability of landslides and the stress characteristics of proposed retaining structures were quantitatively analyzed under different working conditions by using Geo-Studio and Li Zheng software.The results indicate that the landslide is in the stage of creep deformation,and rare heavy rainfall and artificial slope disturbance are the main factors inducing the landslide.The landslide is in an unstable state under natural,rainfall,and earthquake conditions,and the design value of landslide thrust and the internal force and distribution of the proposed anti-slip pile body are obtained.This article proposes a comprehensive treatment plan mainly consisting of anti slip pile sheet wall,arch anchor rod lattice structure,and system interception and drainage,which also provides reference for the treatment of the same type landslide disasters in Ningzhen area.
作者
咸玉建
郭炳跃
戴俊成
王毅
周强
XIAN Yu-jian;GUO Bing-yue;DAI Jun-cheng;WANG Yi;ZHOU Qiang(Geological exploration technology institute of Jiangsu Province,Jiangsu Nanjing 210049,China)
出处
《地下水》
2024年第1期141-143,197,共4页
Ground water
基金
江苏省自然资源发展专项基金项目(苏财资环[2021]46号)。
关键词
宁镇低山丘陵区
降雨型滑坡
成因机制
稳定性分析
防治措施
Ningzhen hilly area
rainfall-type landslide
disaster mechanism
stability analysis
prevention and control measures
