浅层地震反射在不良地质体勘察中的应用研究  

Application and Analysis of Shallow Seismic Reflection in the Unfavorable Geological Body Survey

作　　者：韩松[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《铁道工程学报》2016年第6期11-15,109,共6页Journal of Railway Engineering Society

摘　　要：研究目的:在铁路工程选线不良地质体勘察中,断层、地裂缝以及采空区等不良地质体往往是控制线路走向的关键制约因素,以往采用的常规物探技术所得成果分辨率较差,有时不能满足勘察需求,浅层地震反射法具有独特优势。本文研究如何利用浅层地震反射法对不良地质体进行勘察,以达到查明不良地质体的发育情况,为铁路工程选线提供可靠地质依据的目的。研究结论:(1)良好的沉积环境和震源激发条件是浅层地震反射法取得效果的前提,不良地质体的存在及其活动,使其周围介质与背景岩层产生的波阻抗差异为浅层地震反射法发挥作用的根本原因;(2)浅层地震反射法分辨率较高,能准确圈定采空区范围、确定断层位置及其产状、查明地裂缝发育情况,成功揭示出地质隐患,并评价其对新建铁路线位的影响,可为后续铁路选线提供详实可靠的地质依据;(3)文章取得的成果经验在类似的铁路工程勘察中具有广泛的推广意义。Research purposes： In the investigation of the unfavorable geological body survey of railway engineering, the unfavorable geological body survey, such as faults, ground fissures and gob area, are the key control factors of the control railway alignment. The resolution of conventional geophysical prospecting technology sometimes can not meet the requirements of the survey, but the shallow seismic reflection method has its unique advantages. In this paper, the author studied how to use the shallow seismic reflection method in the unfavorable geological body survey, obtained perfect application effect, and achieved the purpose of finding out development of the unfavorable geological body, and providing the reliable geological basis for the railway line selection engineering. Research conclusions ：（ 1 ） Proper sedimentary environment and seismic source excitation condition are the precondition of use of the shallow seismic reflection method. The difference of wave impedance between the surrounding medium and the background rock stratum, because of the existence and activity of the unfavorable geological body, is the basic reason of the shallow seismic reflection method working. （2） By using the shallow seismic reflection method which has high resolution, we determined the range of gob area, the position and occurrence of faults, and the development of ground fissures, successfully revealed the geological hazard, and provided the detailed and reliable geological basis for the railway line selection. （3） The research results and experiences of this paper have extensive promotion significance inthe similar railway engineering survey.

关 键 词：浅层地震反射法 不良地质体勘察 采空区 断层 地裂缝 

分 类 号：U212.2[交通运输工程—道路与铁道工程]