坛厂隧道施工地质条件综合分析

坛厂隧道施工存在的主要工程地质问题是进口浅埋段岩堆及软土、两条大断层、岩溶及岩溶水、瓦斯。该四大问题集中于隧道进口端,致使隧道施工难度及风险性大大增加。对以上问题进行详细分析,并提出施工期综合地质超前预报技术方案和相应的施工建议。通过施工期地质超前预报的实施和隧道开挖验证,很好地指导了该隧道工程的安全施工,较好地解决了该隧道存在的复杂工程地质问题,保障了工程施工质量。

COMPREHENSIVE ANALYSIS OF CONSTRUCTION GEOLOGICAL CONDITIONS FOR TANCHANG TUNNEL

The main engineering geotechnical problems were the existence of rocks and soft soil in the shallow entrance, the two lager faults, karst and karst water, and gas in Tanchang tunnel. The four main issues focused on the entrance of the tunnel, which made the tunnel construction difficult and the risk increased greatly. Analysis of these issues was done in detail, the comprehensive geological prediction technology in construction period and the corresponding contingency plans for construction were proposed. By the geological prediction of construction period and the implementation of the tunnel excavation verification, the tunnel project construction was done safety under the guidance, complex engineering geological problems of the tunnel were solved and the construction quality was protected.