青海省东旭二级水电站建设工程地质灾害危险性分区评估

Zoning assessment of geological hazards in the construction of Dongxu hydropower station in Qinghai Province

通过对评估区地质概况、岩土类型及工程地质性质进行详细分析,评估区内发育的地质灾害类型为不稳定斜坡(Q)及(T)塌岸两种类型,其中认为不稳定斜坡5段、塌岸1段。评估区划分为2个地质灾害危险性中等区(Ⅱ)和1个地质灾害危险性小区(Ⅲ),在建工程建设场地适宜性分区划为基本适宜、适宜2个区。对不同的地质灾害提出了相对应的防治措施,评估结果为工程设计与建设提供了可靠的数据。

Through detailed analysis of the geological profile,geotechnical types and engineering geological properties of the assessment area,the types of geological hazards developed in the evaluation area were identified as unstable slope(Q)and(T)bank collapse,and there are 5 unstable slopes and 1 bank collapse.The assessment area was divided into two medium-risk geological hazard areas(Ⅱ)and one low-risk geological hazard area(Ⅲ).The construction site under construction was divided into barely-suitable site and suitable site.Corresponding prevention measures were proposed for different geological hazards,and the evaluation results could provide reliable data for engineering design and construction.