长大隧道口渗水井水压裂回灌地下水施工技术研究  

Study on Construction Technology for Recharging Groundwater by Fracturing Water from Infiltration Well at the Entrance of Long and Large Scale Tunnel

作　　者：于海东 YU Haidong(China Railway 12th Bureau Group 3rd Engineering Co.Ltd.,Taiyuan Shanxi 030024,China)

机构地区：[1]中铁十二局集团第三工程有限公司,山西太原030024

出　　处：《铁道建筑技术》2023年第11期176-180,共5页Railway Construction Technology

基　　金：中铁十二局集团有限公司科技研究开发技术项目(集团2021研-23号)。

摘　　要：北方地区通常将长大隧道内水从保温出水口处散排至自然沟渠,在冬季会导致自然沟渠及河道大面积结冰,影响周围生态。为解决此问题,通过现场试验和理论分析,提出渗水井水压裂回灌地下水技术,在隧道进口保温出水口附近施工一定数量的渗水井,采用水力压裂技术对渗水井井下岩层裂隙进行分段加压扩充裂隙,通过渗水井回灌隧道外排的相同水质的地下水。该技术使隧道排水冬季完全经由渗水井排入地下,安装阀门夏季可进行自然排放,能高效解决类似工程施工问题。In the northern region,the water inside the tunnel is usually discharged from the insulated outlet to the natural ditch,which will lead to large-scale icing of the natural ditch and river in winter,affecting the surrounding ecology.In order to solve this problem,this paper conducted on-site experiments and theoretical analysis and proposed an infiltration well water fracturing and recharging groundwater technology,by which a certain number of infiltration wells near the tunnel inlet and outlet were constructed,rock fracture under the infiltration wells by hydraulic fracturing technology under sectional pressurization was expanded,and the groundwater with the same quality of the tunnel drainage through the infiltration wells was recharged.This technology enables the tunnel drainage to be completely discharged into the ground through infiltration wells in winter,and the installation of valves for natural discharge in summer,which can efficiently solve similar engineering construction problems.

关 键 词：长大隧道 渗水井 水力压裂 回灌 

分 类 号：U453.6[建筑科学—桥梁与隧道工程] U455.4[交通运输工程—道路与铁道工程]