摘要
滇藏公路类乌齐-俄洛桥段地质灾害发生频繁,长期以来一直严重影响了该段公路的正常通行。经实地调查研究发现,沿线存在崩塌、滑坡和泥石流等7类地质灾害,共有各类灾害点48处。为使该段公路改建工程的顺利进行,减少地质灾害对改建后公路的危害,文章结合地质环境条件和灾害特征等对全段地质灾害进行了危险性现状评估和预测评估,运用灾损率法和风险性区划法将评估区划分为7个区,并对这7个区进行了地质灾害危险性综合评估、建设场地适宜性和防治工程重要性分级。经综合评估发现,地质灾害危险性大的地区主要分布在地质条件差的高山峡谷地带,危险性小的地区主要分布在地质条件好的宽谷和山岭地带。最后提出了目前青藏高原地区公路地质灾害危险性评估中存在的问题。
The geological hazards occurred frequently from l_eiwuqi to Eluoqiao, the Yunnan-Tibet Highway, which influences the traffic a lot. We found that there 48 geological hazards in this section, including collapses, landslides and debris-flows etc. This paper preliminarily evaluated the risk of geological hazards at present and in the future reconstruction engineering through analyzing the geological environmental factors and hazardous features. Furthermore, the integrated evaluation of the risk on geological hazards, the feasibility of rebuilt field and the classification of hazards prevention of 7 sections in the studied region are evaluated respectively by using the hazardous losing index and hazardous classification methods, which are important for future highway rebuilding and hazards prevention. The result of the assessment basically accords to the field investigation. Some suggests about the risk evaluation of geological hazards in the Qinghai-Tibet Plateau are put forward and discussed in the end of the paper.
出处
《中国地质灾害与防治学报》
CSCD
2007年第3期19-24,共6页
The Chinese Journal of Geological Hazard and Control
基金
国家自然科学基金项目西部重大研究计划(90202007)
成都山地所人才引进项目(Y1006)
关键词
滇藏公路
地质灾害
危险性评估
建设场地适宜性
防治工程
the Yunnan-Tibet Highway
geological hazards
risk evaluation
the feasibility of rebuilt field
preventionengineering
