The application of lead pipe-shed support in tunnel construction;

With the construction case of 65m long pipe-shed pre-reinforcement,the paper introduced the construction technology of long pipeshed with Haiwangxing-508 drilling machine,and discussed the feature requirement of drilling machine in the construction.

Taking the construction practice of pedestrian inclined shaft passing through the quicksand bed in Xiyu Coal Mine, Taiyuan City, as the example, this paper expounds the principles of lead pipe-shield pre-support, the design of pipe-shield support, the construction technology, and the forms of secondary support, etc.

According to the practical engineering characteristics of Xizhigou 1# tunnel,the pipeline shed advance timbering technology is adopted.

The advanced pipe grouting is an effective technique to avoid the instability of shield-tunneling faces in soft or water-bearing ground.