山西吕梁山区城镇边坡风险分级与优化  

Risk classification and optimization of town side slope in Lüliang Mountain

作　　者：王佳运 毕俊擘 杨旭东[2] 李彦娥 马红娜 罗金 WANG Jiayun;BI Junbo;YANG Xudong;LI Yan’e;MA Hongna;LUO Jin(Xi’an Center of China Geological Survey/Northwest China Center for Geoscience Innovation,Xi’an 710054,Shaanxi,China;China Institute of Geo-Environment Monitoring,Beijing 100081,China;Chang'an University,Xi’an 710054,Shaanxi,China)

机构地区：[1]中国地质调查局西安地质调查中心/西北地质科技创新中心,陕西西安710054 [2]中国地质环境监测院,北京100081 [3]长安大学,陕西西安710054

出　　处：《地质通报》2020年第12期2004-2012,共9页Geological Bulletin of China

基　　金：中国地质调查局项目《南疆兵团师市规划建设区资源环境综合地质调查》(编号:DD20201119);《吕梁山区城镇地质灾害调查》(编号:DD20160276)。

摘　　要：因地质环境容量有限,吕梁山区城镇化建设的快速发展导致边坡地质灾害隐患日益突出,严重阻碍了吕梁山区城镇化建设的持续发展。解决城镇边坡安全的首要问题是城镇边坡风险分级,即确定边坡的风险,在此基础上采取相应的边坡地质灾害风险防控措施。以吕梁山区吉县城区为例,在风险分级系统评分指标优化、风险调查与评分的基础上,基于数理统计学理论,依据统计趋势线的自然拐点法对边坡的危险性与危害性分级标准进行了改进与厘定,并划分为高、中、低、很低4个等级,建立了吉县城区边坡风险分级表。依据吉县城区边坡风险分级表,结合边坡的危险性与危害性级别,判定吉县城区高风险边坡22处,中风险84处,低风险21处,风险很低8处。吉县城镇边坡风险分级方法与技术的探索研究,可为吕梁山区城镇边坡地质灾害风险分级与防控、土地利用规划及城镇化建设发展提供技术支撑。The rapid development of urbanization in Lüliang Mountain brings about serious problems of latent geohazards with limit geological environmental capacity,which seriously hinders the sustainable development of urbanization in Lüliang Mountain.The risk classification is the first question to be solved with respect to safety of town side slopes,and then the risk prevention and control of geo-hazards of slopes could be carried out.Taking the urban area of Jixian County in Lüliang Mountain as a study case and based on the optimization of evaluation factors of risk classification system,risk investigation and grading of slopes in the urban area of Jixian County,the authors improved and determined grade standards of slope hazard and consequence with natural inflection point method mathematical HYPERLINK"javascript:;"statistics HYPERLINK"javascript:;"theory,and distinguished four grades,i.e.,high level,middle level,low level and very low level.According to the grade standards,the risk classification standard of slopes in the urban area of Jixian County was set up,and then the risk level of slopes was judged,which included 22 high risk slopes,84 middle risk slopes,21 low risk slopes and 8 very low risk slopes.The method of risk classification of slopes in the urban area of Jixian County can provide risk prevention and control of geohazards of town side slopes,land-use planning and urbanization development in Lüliang Mountain with technical support.

关 键 词：吕梁山区 城镇边坡地质灾害 风险分级 山西 

分 类 号：P642.2[天文地球—工程地质学]