Chloride migration in segment concrete of river-crossing shield tunnels with cracks and joint leakage;

Based on a river-crossing shield tunnel for tri-lane highway super-large section,the structure design course of the tunnel was introduced,including the headroom layout design,lining structure types and the thickness,segment blocks and breadth and assembling way.

Analysis was made on construction safety and construction risk in large cross-river shield tunnel engineering in full detail.

Experimental study on distribution of external water pressure around sub-river shield tunnel in construction period;

This article presents an overview of cross-river tunnel projects in China and the development of large diameter shield tunnelling technology.

Based on longitudinal structure analysis model of cross-river tunnel,relationship under different critical states between longitudinal deformation curvature and circular seam stretching-amount was built.

In a conclusion, the ventilation system innovation to cross-river tunnels is regarded to be of more safety, environmental protection and energy conservation.

Study on the minimum overlying rock thickness of a crossing-river tunnel by borehole-blasting method;