高密度电法和人工源面波勘探在某铁路某区段岩溶注浆效果评价中的应用  

Application of high-density electrical method and artificial source surface wave exploration in the evaluation of karst grouting effect in a section of a railway

作　　者：查李平 Zha Li-ping(The No.326 Geological Team,Bureau of Geology and Mineral Re-sources of Anhui Province,Anqing 246003,China)

机构地区：[1]安徽省地质矿产勘查局326地质队,安徽安庆246003

出　　处：《西部探矿工程》2025年第1期1-5,共5页West-China Exploration Engineering

摘　　要：介绍了应用高密度电法和人工源面波勘探在某铁路某区段岩溶注浆效果评价的具体案例。为降低施工风险,岩溶发育区的铁路桥梁基础通常采用框构桥加注浆加固的方式,因而注浆效果评价是关系到工程安全和质量的关键环节。以往主要通过传统电法勘探和钻探的检测方法,存在施工成本高、探测精度低等问题。基于此,以某铁路两处特大桥岩溶发育区为靶区,分别开展了高密度电法和人工源面波勘探在两处跨越点附近的某区段岩溶注浆效果评价。通过该区段注浆前后两组相同点位地层电阻率ρ_(s)及横波速度ν_s结构特征对比得到:(1)注浆前圈定的岩溶发育区或基岩破碎区呈低阻低速特征,ρ_(s)为10~130Ω·m,ν_(s)为450~850m/s;(2)注浆后相同位置低阻低速异常区消失或规模大幅减小,ρ_(s)为100~300Ω·m,ν_(s)为800~1200m/s;(3)高密度电法和人工源面波勘探能在该区实现岩溶注浆效果的科学评价,该区段注浆加固治理效果较好。高密度电法和人工源面波勘探在该区段岩溶注浆效果评价中的成功应用,大幅提升了该工程后续基础建设的安全性和可靠性,另外作为一种高效精准的岩溶注浆探测模式更具有推广应用的实际意义。The article introduces a specific case of applying high-density electrical method and artificial source surface wave explo-ration to evaluate the effect of karst grouting in a certain section of a railroad.In order to reduce the construction risk,the foundation of railroad bridge in karst development area usually adopts the way of frame bridge plus grouting reinforcement,so the evaluation of grouting effect is a key link to the project safety and quality.In the past,the detection methods mainly through traditional electrical exploration and drilling have problems such as high construction cost and low detection accuracy.Based on this,a railroad two special bridge karst development area as the target area,respectively carried out high-density electrical method and artificial source surface wave exploration in the two crossing points near a section of karst grouting effect evaluation.By comparing the structural characteristics of the resistivity ρs and cross-wave velocity vs at two identical points before and after grouting in this section,it is obtained that:①the karst development area or bedrock fragmenta-tion area circled before grouting is characterized by low resistance and low velocity,with ρ_(s) of 10-130Ω-m and vs of 450-850m/s;②the low resistance and low velocity anomalous area at the same location disappears or decreases significantly after grouting,withρs of 100-300Ω-m and v_(s) of 800-1200m/s.vs 800~1200m/s;③High-density electrical method and artificial source surface wave exploration can realize scientific evaluation of karst grouting effect in this ar-ea,and the grouting reinforcement treatment effect is better in this section.The successful application of high-density electric method and artificial source surface wave exploration in the evaluation of karst grouting effect in this section not only greatly improves the safety and reliability of the subsequent infrastructure construction of the project,but also has practical significance as an efficient and accurate mode of karst grouting det

关 键 词：高密度电法 人工源面波勘探 岩溶注浆 检测效果评价 铁路 

分 类 号：P631[天文地球—地质矿产勘探]