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(1)：地质环境安全现状评价  

Research on Environmental Geological Safety Evaluating and Geological Disasters Controlled Measures in Highway Engineering Domain of Tianshui Dingxi Expressway(Ⅰ):Evaluating for Present Environmental Geological Safety

作　　者：张惠清[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1期183-188,共6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-定西公路工程通过地区地质构造复杂,环境地质安全如果不加以重视,易造成道路的地质灾害,影响到工程建设的安全性.根据已有资料及野外调查,区内地质灾害类型主要为滑坡、崩塌、泥石流,共发育80处;此外尚有黄土湿陷、软土等工程地质问题.其中,发育滑坡32处,现状评估稳定性好的21处、较差的7处、差的4处,处于危险性中等的2处,危险性小的30处;崩塌13处,现状评估稳定性差的8处、较差的5处,处于现状危险性中等的1处,危险性小的12处;泥石流沟谷35条,现状评估中易发12条、低易发23条,处于危险性大的2条,危险性中等的11条,危险性小的22条.区内黄土丘陵和河谷区黄土广布,黄土湿陷性普遍存在;软土在雨水和施工机械联合影响下,会造成路面翻浆变形,但易于清理,其危险性小.On the basis of the field investigation and analysis of the land damaged of geological hazards by historical documental records, role of geology in engineering, rock mass classifications, geological engineering aspects of underground excavations, slopes are introduced. 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 should be deeply attention, and evaluation of natural environment and land use safety in highway building. Field mapping of faults, scarps, mass wasting units, Quaternary deposits, fractures, folds, and bedrock is a first step of evaluation on environmental geological safety. Overseeing the on-site hazard data collection and assessment efforts, by analyzing data, it provides accurate and complete onsite hazard recommendations. 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.

关 键 词：环境地质 安全评价 山区公路 天水-定西公路 

分 类 号：X820.2[环境科学与工程—环境工程]