Study on the High Risk of Bias Shallow Tunnels Construction Technology

Shallow V bias level grade rock tunnel surrounding rock has many features, such as the risks, complex geological situation,large construction difficulty. In this paper, combined with the bias railway tunnel in copper nine frog Ridge, the excavation and construction technology, the weak wall construction technology measures are summed up, initial support and lining construction technology measures to prevent leakage of technical measures, high-risk bias, measures of tunneling technology to ensure construction points, shallow tunnel construction precautions are put forward to provide references for similar projects.