中天山隧道节理密集带高压富水段施工技术

Construction technology of Mid-Tianshan Tunnel at close-jointed and high pressure and abundant water section

以中天山右线隧道节理密集带高压富水段施工为例,对产生高压富水现象的水文及地质情况进行了详细的分析,提出了"注浆减排、排水降压"的施工原则,"注浆局域划分,对角泄水降压"的注浆顺序,详述了节理密集带注浆设备、材料、工艺、参数等,强调要对注浆堵水效果进行多方面的验证,以确保在高压富水地质条件下开挖等后续施工的绝对安全。

Taking the construction of Mid-Tianshan Tunnel at close-jointed and high pressure and abundant water section as an example,the paper analyzes the hydrogeological conditions at high pressure and abundant water section,puts forward the construction principle of＂grouting reducing pressure,drainage reducing pressure＂and grouting procedure of＂grouting domain division and diagonal drainage reducing pressure＂,describes the grouting facilities,materials,technologies and parameters at close-jointed area,emphasizes multiple testifying grouting water controlling effect,with a view to ensure continuous safe construction under the geological condition of high pressure and abundant water.