西宁市南川东路地质灾害形成机理及防治研究

Study on the formation mechanism and prevention of geological disasters of Nanchuan East Road in Xining

为探明近年来西宁市南川东路地质灾害多发频发原因及形成机理,本研究借助Google影像,通过现场调查、收集以往地质灾害资料、数理统计分析,对2005—2020年南川东路地质灾害发育特征、形成机理和已建防治工程成效进行研究分析。研究表明:研究区地质灾害的发生是多方面作用的结果,古近系泥岩石膏岩与砂岩互层岩组和松散堆积的崩积物是崩塌、滑坡发育的物质基础,上部陡崖和下部陡坡的斜坡形态为崩塌、滑坡的发育提供了有利的地形条件,降雨、绿化灌溉是主要的诱发因素;针对地质灾害建设的防治工程防灾减灾成效较为显著。研究成果对今后南川东路及类似地质灾害防治具有参考价值。

In order to find out the causes and formation mechanism of frequent geological disasters of Nanchuan East Road in Xining in recent years,in-depth research and analysis on the development characteristics,formation mechanism and the effectiveness of existing prevention and control projects of geological disasters in Nanchuan East Road from 2005 to 2020 is conducted through on-site investigation,collection of previous geological disaster data and mathematical statistical analysis with the help of Google images.The results show that the geological disasters in the study area are caused by various factors.Paleogene mudstone gypsum rock,sandstone interbedded rock group and loose accumulated colluvium are the material basis for the development of collapses and landslides.The slope morphology of the upper steep cliff and the lower steep slope provides favorable topographic conditions for the development of collapses and landslides.In addition,rainfall and greening irrigation are the main inducing factors.The prevention works for geological disaster construction have achieved remarkable results.The results have reference value for the prevention and control of Nanchuan East Road and similar geological disasters in the future.