层次分析法在深厚覆盖层水电钻探卡钻因素分析中的应用

The Application of Analytic Hierarchy Process(AHP)to the Analysis of Sticking Factors of Hydroelectric Drilling in Deep Overburden

查明覆盖层特性是水电工程勘探重要内容,覆盖层由于结构层次复杂、松散架空、含巨漂、含细粒土、多层地下水等,极易发生钻孔事故,成孔困难。为降低深厚覆盖层水电钻孔事故,对导致事故的因素进行分析,明确主要因素,有效预防事故。本文基于层次分析法,克服了卡钻事故背后错综复杂因素的分析难点、因素间相互影响的难点以及定量数据缺乏的难点,通过科学的分析方法的应用,将复杂因素问题简单化,寻找出最易导致深厚覆盖层水电钻探卡钻事故的因素为覆盖层物质组成因素,极大地提高水电钻探工作的有效性。将该方法应用于牙根二级水电站工程实例中,取得了较好的效果,具有一定的工程应用价值。

Overburden is characterized by its loose and complex structure,bearing drift pebble and fine soil and multi-layer groundwater which is often responsible for drilling accidents.Therefore,finding out the characteristics of overburden is of importance to hydropower project exploration.By the example of the Yagen-II hydropower station project,this study applies analytic hierarchy process(AHP)to analyzing sticking factors of hydroelectric drilling in deep overburden,improving the effectiveness of hydroelectric drilling.