雪峰山特长铁路隧道白沙斜井主要难点与对策

为解决长大斜井一井多面施工中的主要难题,以向莆铁路雪峰山隧道白沙斜井为背景,分析该隧道通信联络、施工通风、反坡排水、交通运输、不良地质风险控制等方面的施工对策。主要得出以下结论:1)采用以移动电话设施进洞为主的多种通讯联络方式,提高了管理效率,缩短了应急响应时间;2)使用新型螺旋风管,采用单机单管压入式通风技术,简单、便捷、可靠、高效,通风效果较好;3)在反坡段工作面设置移动水仓及泵站,并充分发挥各级泵站抽排能力,有效规避了工作面被淹可能;4)通过防溜土墩、声光报警装置、限速行驶、人车分道行驶等措施,确保了洞内繁忙运输交通得以有条不紊地进行;5)对不良地质采用风险再评估、风险动态管理、风险信息公示等关键措施,有效控制了不良地质可能诱发的施工风险。

Difficulties in Construction of Baisha Inclined Shaft of Xuefengshan Extra-long Railway Tunnel and their Countermeasures

Baisha inclined shaft of Xuefengshan tunnel on Xiangtang-Putian railway is designed to provide service for 4 tunneling faces at the same time.Countermeasures for such difficulties as communication,construction ventilation,anti-slope drainage,transportation and control of risk in bad geological conditions are analyzed,with the construction of Baisha inclined shaft as an example.Conclusions drawn are as follows： 1） The management efficiency is improved and the emergency response is quickened by using mobile communication technology;2） The new type of ventilation ducts and force-in ventilation mode with dedicated ventilation fan and duct system for each tunneling face adopted are simple,convenient,reliable and efficient,which results in good ventilation effect;3） The possibility of flooding is effectively avoided by setting up mobile water sumps and mobile pump stations at the working faces in anti-slope sections;4） Successful transportation is guaranteed in the inclined shaft by using technologies of antislipping mounds,acoustic and light warning devices,speed limiting and separation between pedestrians and vehicles;5） The construction risks under bad geological conditions are well controlled by means of risk reassessment,risk dynamic management and risk information revealing.