大地电磁测深法在高原特长隧道勘查中应用研究

发布时间：2018-05-07 23:15

本文选题：高频大地电磁测深 + 雀儿山　；参考：《地球物理学进展》2014年05期

【摘要】：针对高原地区高寒、高海拔、特长深埋隧道的综合勘探技术研究,是我国公路隧道勘察中近年来研究的热点和难点,传统钻探及调绘等手段在高原隧道勘察中具有很大的局限性,采用新的技术手段是提升高原隧道综合勘察水平的重要因素.本文通过对世界上海拔最高的特长隧道雀儿山隧道(最高海拔超过5000m,工程地质条件极其复杂,次级断裂发育,岩体为花岗岩体,采用传统地质手段对构造识别困难)采用高频大地电磁测深法进行构造、岩性的勘察,分别从高频大地电磁方法的采集手段、静态校正、反演方法等关键技术问题进行分析,结合钻探及地质调绘资料,认为高频大地电磁法可以在宏观上查明深埋隧道地层岩性分界、地质构造及其赋水性,为钻孔布置及隧道设计、施工提供地球物理依据,在高原地区深埋隧道勘查中能起到理想的效果,值得作为一种有效方法进行推广.
[Abstract]:In view of the comprehensive exploration technology of high and cold, high altitude and super long buried tunnels in the plateau area, it is a hot and difficult point in recent years in the investigation of highway tunnels in our country. The traditional drilling and drawing methods have great limitations in the exploration of plateau tunnels, and the adoption of new technical means is an important factor to improve the level of comprehensive investigation of plateau tunnels. In this paper, the engineering geological conditions are extremely complex, secondary faults are developed, and the rock mass is granite body, which is the highest elevation tunnel in the world (the highest elevation is more than 5,000 m), the engineering geological conditions are extremely complex, the secondary faults are developed, and the rock mass is granite. Using the traditional geological means to identify the structure is difficult) using the high frequency magnetotelluric sounding method to carry on the structure, the lithology investigation, separately carries on the analysis from the high frequency magnetotelluric method collection means, the static state correction, the inversion method and so on key technical question, Combined with drilling and geological mapping data, it is considered that the high frequency magnetotelluric method can be used to find out the lithologic boundary, geological structure and water-bearing capacity of deep buried tunnel strata macroscopically, and to provide geophysical basis for drilling arrangement, tunnel design and construction. It can play an ideal effect in deep buried tunnel exploration in plateau area and is worth popularizing as an effective method.
【作者单位】：成都理工大学地球物理学院;四川省交通运输厅公路规划勘察设计研究院;中石化西南油气分公司勘探开发研究院;
【基金】：四川省交通科技项目(110102033)资助
【分类号】：U452.11;P631.325

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