高速铁路岩溶隧道注浆加固控制技术研究

Research on Grouting Reinforcement Control Technology of Karst Tunnel in High-speed Railway

文章基于某山区高速铁路穿越岩溶发育区隧道工程,根据物探与钻探相结合的方式进行溶洞位置、大小及填充物勘探。并采用先导孔取芯对勘察结果进行验证,进一步验证和揭示溶洞发育范围。结合现场取芯分析围岩地层参数,并通过理论分析计算注浆压力。指导对隧底进行钢花管注浆加固,拱墙及拱脚采用径向注浆加固。

This article is based on the tunnel project of a high-speed railway passing through karst development areas in a certain mountainous area.The location,size,and filling of karst caves are explored through a combination of geophysical exploration and drilling.And the exploration results were verified by using lead hole coring to further verify and reveal the range of karst cave development.Combined with on-site coring,the surrounding rock strata parameters are analyzed,and the grouting pressure is calculated through theoretical analysis.This can provide guidance for steel flower tube grouting reinforcement of the tunnel bottom and radial grouting reinforcement of the arch wall and arch foot.