关键词: 竖井井口场坪, 设置模式, 断面尺寸, 施工方法及支护结构, 机械设备配套, 施工能力, 井底车场, 安全保障

Abstract: In order to meet the construction requirement for the shaft of the Gaoligong mountains, comprehensive tunnel environment and well capacity requirements, in accordance with the shaft well, wellbore, the underground three aspects as a whole to consider the overall design train of thought, puts forward solutions to key problems in the design of railway tunnel shaft:（1）according to the wellhead conditions of landform and physiognomy and lifting equipment, wellhead yard layout, reasonable arrangement of well field flat;（2）According to the vertical shaft function positioning, the vertical shaft should adopt the main and auxiliary shaft mode;（3）Comprehensively consider the cross section size of the shaft according to the amount of slag, quantity of materials and quantity of personnel in and out of the underground construction;（4）When geological and hydrogeological conditions permit, the mixed operation method of shortsection excavation and laying of the shaft is suitable for construction, and a single layer of molded concrete lining is set;（5）The hoisting equipment of vertical shaft should be considered according to the requirements during downhole construction, and the capabilities of each equipment should be matched during well construction;（6）The construction capacity of the shaft shall meet the requirements of slags and feedstock during underground construction and leave a surplus；（7）The vehicle yard at the bottom of the well shall be determined according to the mode of transportation and functional requirements such as feeding and slag discharge;（8）The safety of vertical shaft should first solve the problem of groundwater. The results show that the railway tunnel shaft is feasible according to the above design methods and ideas. At present, the main shaft of No.1 shaft in Gaoligongshan Tunnel have been successfully constructed.

Key words: shaft head field flat, setting mode, section size; construction method and supporting structure, supporting machinery and equipment, construction capacity, bottom hole vehicle yard, security