高黎贡山隧道1号竖井设计及分析

为了满足高黎贡山隧道竖井施工任务要求,综合隧道所处环境及竖井能力需求,按照竖井井口、井筒、井下3方面统筹考虑的总体设计思路,提出高黎贡山隧道1号竖井设计关键问题的解决方案： 1）根据井口地形、地貌条件及提升设备、井口车场布置要求,合理布置井口场坪; 2）根据竖井功能定位,竖井宜采用主副井模式; 3）根据井下施工的出渣量、材料数量、人员进出量等综合考虑竖井断面尺寸; 4）当地质条件、水文地质条件允许时,竖井宜采用短段掘砌混合作业法施工,设置模筑混凝土井壁; 5）竖井提升设备宜按井下施工期间的要求考虑,建井期间各设备之间能力应匹配; 6）竖井施工能力应满足井下施工期间出渣、进料要求,并留有富余; 7）井底车场应结合运输方式及进料、出渣等功能要求确定; 8）竖井安全保障应首要解决地下水问题。目前高黎贡山隧道1号竖井主井已完成建井,结果表明铁路隧道竖井按照以上设计方法及思路是可行的。

Design and Analysis of No.1 Shaft in GaoligongshanTunnel

In order to meet the construction requirement for theshaft of the Gaoligong mountains, comprehensive tunnel environment and wellcapacity requirements, in accordance with the shaft well, wellbore, theunderground three aspects as a whole to consider the overall design train ofthought, puts forward solutions to key problems in the design of railway tunnelshaft:（1）according to the wellhead conditions oflandform and physiognomy and lifting equipment, wellhead yard layout,reasonable arrangement of well field flat;（2）According to the vertical shaft function positioning, the verticalshaft should adopt the main and auxiliary shaft mode;（3）Comprehensively consider the cross section size of the shaftaccording to the amount of slag, quantity of materials and quantity ofpersonnel in and out of the underground construction;（4）When geological and hydrogeological conditions permit, the mixedoperation method of short section excavation and layingof the shaft is suitable for construction, and a single layer of moldedconcrete lining is set;（5）Thehoisting equipment of vertical shaft should be considered according to therequirements during downhole construction, and the capabilities of eachequipment should be matched during well construction;（6）The construction capacity of the shaft shall meet the requirementsof slags and feedstock during underground construction and leave a surplus;（7）The vehicle yard at the bottom of the wellshall be determined according to the mode of transportation and functionalrequirements such as feeding and slag discharge;（8）The safety of vertical shaft should first solve the problem ofgroundwater. The results show that the railway tunnel shaft is feasibleaccording to the above design methods and ideas. At present, the main shaft ofNo.1 shaft in Gaoligongshan Tunnel have been successfully constructed.