天水定西公路路域地质环境安全评价与灾害防治对策研究(2):地质灾害综合评估与防治对策  

Research on Environmental Geological Safety Evaluating and Geological Disasters Controlled Measures in Highway Engineering Domain of Tianshui-Dingxi Expressway (Ⅱ): Comprehensive Evaluation of Geological Disasters and Controlled Measures

作　　者：张惠清[1] 王世武[1] 岳平七 李海军[1] 

机构地区：[1]甘肃省地矿局第三地质矿产勘查院,甘肃兰州730050 [2]甘肃省地矿局第二地质矿产勘查院,甘肃兰州730020

出　　处：《冰川冻土》2008年第5期896-902,共7页Journal of Glaciology and Geocryology

基　　金：西部交通建设科技项目(2004-318-000-57)资助

摘　　要：天水-定西高速公路通过地区的地质灾害危险性预测评估结果表明,公路建设可能引发或加剧的地质灾害危险性包括:16处原有滑坡复活的危险性;7处崩塌的危险性;2处泥石流的危险性.路基开挖≥20 m的高边坡有24处,其中工程建设可能引发或加剧其危险性的有8段;隧道进出口可能引发滑坡、崩塌地质灾害的有16处;工程建设本身可能遭受滑坡危害的有13处;崩塌危害的有10处;泥石流危害的有28条.根据区内地质灾害的特征及其对工程建设的影响和危险性,将评估区分为危险性大、中和小3个区,其中属于危险性大的有3段;危险性中的有3段;危险性小的有2段.地质灾害根据其类型的不同采用不同的防治措施,在施工过程中应注意对地质环境的保护.On the basis of the field investigation and analysis of risks of geological hazards, complex geological structure, special geographical setting, various rock and soil types, steep landform and frequent rainfall along highway engineering domain of Tianshui-Dingxi Expressway are risk factors for building engineering and mountainous highway environmental geological safety, and evaluation of natural environment and land use safety in highway building. The results show that there are 80 geological disasters potential risk sites in the highway engineering domain of Tianshui-Dingxi Expressway including 32 landslides, 13 scarps fallings and 35 debris flows. It showed that the potential risks of regional geological hazards in Tianshui-Dingxi Expressway, the construction of highway may be trigger or aggravate the occurring of geological hazards. There are 16 original landslides may be revival, 7 scarps failings may be in potential risks, 2 debris flows may be in potential risks. There are 24 high-steep slopes with more high than 20m, 8 of which, the engineering construction could trigger or exacerbate the risks of those. The entrances and exits of tunnels may be result in 16 landslides and scarps failings. The engineering construction itself may be at the potential risks of 13 landslide hazards, 10 scarps failings and 28 debris flows hazards. Based on the characteristics and the effects on engineering construction of the geological disasters, the regional comprehensive evaluation and zoning of potential risks was divided into 3 high- risk zones, 3 middling-risk zones and 2 low-risk zones. The different control measures should be taken in the corresponding geological hazards. We should protect the geological environment in the process of constructing.

关 键 词：地质灾害 综合评估 防治对策 天水-定西公路 

分 类 号：X820.2[环境科学与工程—环境工程]