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1工程概况北天山隧道为北天山越岭主隧道,是精(河)伊(宁)霍(尔果斯)铁路的主要控制工程,位于北天山西段的中山区内,是伊犁盆地和准格尔盆地的分水岭,其岭脊线近东西走向展布。隧道起讫里程DK109+240～DK122+850,全长13610m,平行于正洞中心线左侧30m处设计贯通型平导,全长13560m,每420m有横通道
1 Project Overview The North Tianshan Tunnel is the main tunnel of the Beier Tianshan Mountains. It is the main control project of the Jing (River) Huo (Ergos) Railway. It is located in the Zhongshan District of the western section of the North Tianshan Mountains and is the main site of the Yili Basin The watershed of the Geer Basin has its ridgeline spreading nearly east-west. Tunnel starting and ending mileage DK109 +240 ~ DK122 +850, a total length of 13610m, parallel to the center of the hole at the left 30m at the design of through-type flat-guided, full-length 13560m, 420m horizontal cross-channel