川藏公路二郎山隧址及邻区断层活动性评价和三维数字仿真地形模型的应用

Fault activity assessment of the erlangshan tunnel and adjacent areas and application of 3-dimentional digital emulating topography model

一、前言近年来,随着地震预报和工程建设的需要,活断层研究受到人们越来越多的关注,并且在许多方面取得重大进展。目前国内外发展比较成熟的活动断层研究的新技术新方法,大致可分为以下几类:①构造地质—地貌学方法(包括航空和遥感地质判译);②第四系沉积和相分析:③新年代学测定;④槽探工程:⑤地球物理和地球化学探测;⑥信息科学中的计算机技术(如三维数字仿真地形模型)的应用等。

Quaternary stratigraphy,geologic chronology and tectonic-morphology are of fundament for active fault assessment.In areas where strongly denudation and short of Quaternary sediment layers,structural geologic and geomorphologic studies of faults are especially important for the assessment.In this paper,we have evaluated the active faults in and around Erlangshan tunnel by locale field investigation,age data sampling,and combined with 3-dimentional digital topography model studies.