天水市北山黄土崩塌灾害特征、成因及防治  

Characteristics,Causes and Controlling of Loess Collapses in Beishan Mountain of Tianshui City

作　　者：辛存林[1] 杨国林[1] 赵志鹏[1] 孙现辉[1] 马维云[1] 李鸿儒[1] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州730070

出　　处：《水土保持通报》2013年第1期120-123,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金"甘肃窑街侏罗纪真蕨植物化石微细构造"(41262001);甘肃省科技支撑基金"甘肃省陇南金矿资源潜力评价与优化开发研究"(1104FKCA116);甘肃省高等学校研究生导师科研项目"甘肃省两当县金厂沟金矿成矿作用及选冶技术研究"(1101-07);兰州市科技计划基金"兰州市矿产资源的成矿潜力评价及可持续发展"(2011-2-89);甘肃省天水市秦城区建设局基金"天水市城区北山生态综合治理与地质灾害危险性评估"(GS0001-C03005-2010-010)

摘　　要：通过野外调查和分析实验数据,用数理统计法对天水市北山黄土崩塌特征进行了统计分析。通过对研究区黄土崩塌地质灾害的成因的分析,揭示了该区黄土崩塌地质灾害发育的物质基础、力学性质、自然因素和人为因素。结果表明,天水市北山黄土崩塌灾害以中、小型为主,崩落范围为5～15m;黄土崩塌的坡高集中在15～40m,坡度集中在58°～90°;潜在黄土崩塌的坡高集中在10～38m,坡度集中在48°～90°。结果认为天水市北山黄土崩塌的促发因素为降水、泉水、地震和人类活动,提出了黄土崩塌灾害的防治原则及其适宜性措施。研究结果可为进一步治理该区黄土崩塌灾害提供理参考。By field geo-hazard survey, statistical analysis on the characteristics of loess collapses in the Beis- han Mountain of Tianshui City is performed using historical and current experimental data. The analysis and discussion on the formation mechanisms of loess collapses in the study area have revealed the material basis, mechanical properties, natural and artificial conditions of loess collapses. Results show that the geo-hazard is dominated by small or middle type of loess collapses, The results indicate that the geo-hazard of loess land- slide is concentrated on small or middle type, the height of slope is from 15 m to 40 m and the gradient slope varies from 58% to 90%. However, the height of slope assigned to potential loess landslide focuses on the range from 10 m to 38 m, correspondingly, the gradient slope is from 48% to 90%. The loess collapses in the Beishan Mountain were caused by precipitation, springs, earthquakes and human activities. Accordingly, some meas- ures can be suggested for controlling the loess collapses. Results from the study may provide guidance for controlling loess collapses in this region in future.

关 键 词：天水市北山 黄土崩塌 特征 成因 防治 

分 类 号：P642.131[天文地球—工程地质学]