摘要
研究目的:国民经济的迅猛发展对铁路的运能及运行速度提出更高要求,铁路等级的不断提升造成线路桥隧比的增加,隧道尤其中浅埋隧道的勘察成为铁路勘察中的重点。浅地表物探勘察方法较多,不同地质要求及勘察条件所采用的方法多样、效果不一,亟待综合考虑工期、地表条件、噪声干扰情况、地质目的及精度要求并兼顾工程造价等开展中浅埋隧道综合物探勘察模式的研究。研究结论:(1) 0～50 m埋深隧道以地震折射波法、地震层析法沿隧道平面线位贯通勘察,直流电测深法补充、核查;(2) 50～100 m埋深隧道以直流电测深法(高密度电法、直流激电法)或瞬变电磁法沿隧道贯通,地震折射波法补充、核查,复杂地段开展孔内综合测井;(3) 100～200 m埋深隧道以高频(音频)大地电磁法沿隧道贯通,在隧道进出口及垭口地段布置地震折射波法,复杂地质段结合钻孔开展孔内综合测井;(4)中浅埋隧道勘察受地表地质条件影响较大,野外施测必须密切结合现场实际,选择适宜的物探方法,建立合理、规范的中浅埋隧道综合物探勘察模式;(5)本研究结论适用于地质勘探领域,中浅埋隧道物探勘察。
Research purposes： The rapid development of the national economy made higher demands on railway transportation capacity and operating speed, with the continuous improvement of railway grades, the proportion of tunnels has gradually increased, the survey of tunnels, especially middle and shallow tunnels, has become a key point in railway geological surveys. There are many methods for shallow geophysical exploration, the methods used for different geological requirements and survey conditions are varied and have different effects. The research on comprehensive geophysical prospecting models for middle and shallow buried tunnels, need to consider comprehensively the project duration, surface conditions, noise disturbances, geological purposes and accuracy requirements and taking into account project cost, etc. Research conclusions： （ 1 ） For the exploration of 0 - 50 m depth tunnel, use seismic refraction wave method and seismic tomography along the whole tunnel plane line, and use DC sounding method to supplement and verify. （2） For tunnel with depth of 50 - 100 m, detect the entire tunnel by DC sounding （ high - density electrical method, DC induced polarization method） or transient electromagnetic method （TEM）, and use seismic refraction wave method to supplement and verify, in complex areas, conduct integrated geophysical logging. （3） For tunnel with depth of 100 - 200 m, detect the entire tunnel by high frequency （audio） magneto telluric method （AMT）, in the tunnel entrance, exit and surface low- lying areas use seismic refraction wave method, in complex areas, conduct integrated geophysical logging. （4） The survey of the shallow tunnels is greatly affected by the surface geological conditions. The field survey must closely integrate with the actual site and select the appropriate geophysical exploration method, and establish a rational and standardized comprehensive geophysical prospecting model. （5） The research result is applicable to geophysical exploration of shallow
作者
许广春
XU Guang-chun(China Railway Design Corporation,Tianjin 300251,China)
出处
《铁道工程学报》
EI
北大核心
2018年第8期21-26,59,共7页
Journal of Railway Engineering Society
关键词
铁路勘察
中浅埋隧道
综合物探
模式
railway geological survey
shallow -medium shallow buried tunnel
comprehensive geophysical prospecting
model
