白露山引水隧洞设计为一直墙圆弧拱断面，全长1821.469m。洞身穿过的岩石主要由凝灰岩、粉砂岩、砾岩夹粉细砂岩等组成。出口段由于离地表高程小于3m，故风化十分强烈，隧洞塌方长度12.5m，塌体向洞内涌出8m远。根据现场的具体情况，我们 Bailuoshan diversion tunnel has been designed as a circular arc arch section, a total length of 1821.469m. The rock through the cave mainly consists of tuff, siltstone and conglomerate sandstone. As the exit section is less than 3m above the earth’s surface, weathering is very strong. The tunnel collapse length is 12.5m and the collapse body is 8m away from the cave. According to the specific circumstances of the scene, we