地质预报在萝卜岗隧道施工中的应用

Application of Geological Prediction to Luobogang Tunnel Construction

萝卜岗隧道为四川大渡河瀑布沟水电站库区公路复建工程重要控制性工程之一,该隧道地质条件复杂,隧道开挖过程中遇到浅埋段变形、岩体破碎带、地下水、岩爆等多种地质问题,极大地增加了隧道施工难度和施工风险,影响了施工进度及施工安全。针对隧道施工中可能出现的地质问题,采用了适合的综合地质预报技术,通过信息的及时反馈,制定相应的施工预案,较好地解决了隧道存在的复杂工程地质问题。

Luobo Gang tunnel is one of the most important rebuilt constructions of Pubugou reservoir highway of the Dadu river in Sichuan province. The main engineering geotechnical problems in the tunnel are the existence of soft rock and soil in the shallow entrance,faults,broken rock and soft rock layers and groundwater. Many problems such as big deformations and collapses often happened in the tunnel construction,which made the tunnel construction difficult and the risk increases greatly. The paper will propose the comprehensive geological prediction technology in construction period and the corresponding contingency plans for construction to solve the complex engineering geological problems of the tunnel.