Based on analysis of pre-timbering with tubular prop technology under two natural conditions, described the properties of this technology.

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.

Based on an actual construction project,a tunnel construction procedure with pipe shed support is simulated with three-dimension nonlinear FEM.

In combination with the suburban track engineering of the Guangzhou-Shenzhen railway line underpassing the Guangzhou Shenzhen high speed highway,the paper mainly discussed the form and structure of high aperture pipe shed support and its influence on the high speed highway.

The application of pipe-shed support method in bridge construction beneath expressway;

Numerical simulation of pipe roof support in the middle and deep part of coal mines

The paper discussed common problems of pipe roof support engineering in soft ground and presented the optimization technology by tests on borehole construction methods with existing equipments.