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山尾旗隧道位于赣龙铁路DK264+407～DK266+821,全长2414m,为上海局属施工企业历史上施工最长的一座隧道,进口228m表层为碎石土,橙黄色,稍湿、松散的V级围岩,中间夹有石灰岩,采用短台阶法施工,出口206m表层为砂粘土,灰黄色、软塑状态的V级围岩,地下水发育,亦是采用短台阶法施工,中间1980m为Ⅲ级围岩,采用光面钻爆全断面施工。
The Shanweiqi Tunnel is located at DK264 + 407 ~ DK266 + 821 of Gan-Long Railway, with a total length of 2414m. It is the longest tunnel construction ever undertaken by a Shanghai-based construction enterprise. The tunnel covers an area of 228m with gravel soil, yellowish orange, slightly wet and loose V grade rock with limestone in the middle and short step method for construction. The 206m outlet is V grade rock with sand clay, grayish yellow and soft plastic state. Groundwater is also developed with short step method. The middle 1980m is Ⅲ Surrounding rock, using smooth blast full-face construction.