京广铁路浅覆盖型岩溶路基注浆整治策略  

Grouting Treatment Strategy of Shallow⁃covered Karst Subgrade of Beijing-Guangzhou Railway

作　　者：赵威 ZHAO Wei(Geological and Subgrade Design&Research Institute,China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司地质与路基设计研究院,武汉430063

出　　处：《铁道建筑》2023年第8期130-134,共5页Railway Engineering

基　　金：湖北省重点研发计划项目(2021BAA050)。

摘　　要：京广铁路广州段路基近几年多次出现岩溶塌陷,严重影响铁路安全运营,部分段落亟须进行注浆加固。为避免盲目注浆,制定了浅覆盖型岩溶注浆整治策略。首先收集铁路路基沿线附近钻孔资料,划分岩溶塌陷风险段,采用多源频率域地震波法对岩溶发育中、高风险段进行探查。然后结合物探成果和地层特征,制定注浆方案。最后选取部分注浆段落物探复测,评价注浆效果。结果表明,多源频率域地震波法能够较好地适用于既有线铁路勘察,优化了注浆方案在有效控制成本的基础上,达到了预期注浆加固效果。In recent years,the subgrade of the Guangzhou section of Beijing-Guangzhou railway has suffered karst collapse many times,which seriously affects the safety of railway operation.Some sections need grouting reinforcement urgently.To avoid blind grouting,a shallow-covered karst grouting treatment strategy has been developed.Firstly,collected drilling data near the railway subgrade,divided the karst collapse risk section,and used the multi-source frequency domain seismic wave method to explore the medium and high-risk sections of karst development.Then,based on the results of geophysical exploration and geological characteristics,a grouting plan was formulated.Finally,some grouting sections were selected for geophysical retesting to evaluate the grouting effect.The results indicate that the multi-source frequency domain seismic wave method can be well applied to the survey of existing railways,optimize the grouting scheme,and achieve the expected grouting reinforcement effect on the basis of effective cost control.

关 键 词：铁路路基 注浆策略 现场试验 覆盖型岩溶 地面塌陷 多源频率域地震波法 

分 类 号：U216.41[交通运输工程—道路与铁道工程]