高压旋喷桩在隧道浅埋段围岩加固中的应用

Application of High-pressure Jet Grouting Pile in Reinforcement of Surrounding Rock in Shallow Tunnel

粤东地区线路所经区域以低山丘陵、河流冲积平原为主,中新生代断陷盆地镶嵌其间,整体地形起伏较大。该地区隧道具有地形多变、短隧道多、浅埋段落多、溜塌地质灾害多等特点,利用高压旋喷桩对隧道浅埋段落进行加固,为隧道暗洞安全开挖提供了保障,同时对洞身围岩进行加固还可以消除危害铁路运营安全的工程病害。

Passing through low hills and river flats largely as well as scattered Mesozoic-Cenozoic faulted basins,the routes in Eastern Guangdong feature major topographic relief.As the tunnels in the area are characterized by changing terrain,frequent short tunnels,shallow buried sections,and collapsing geological hazards,high-pressure jet grouting piles have been used to brace the shallow buried sections of the tunnels as well as guarantee safety in the excavation of the dark holes,strengthen the surrounding rocks of the cave,and eliminate construction risks threatening the railway operation.