Analysis of the Collapse Mechanism and Stabilization Optimization of the Composite Stratum at the Boundary between Prereinforced and Unreinforced Areas near a Shield Launching Area

Abstract Grouting reinforcement methods are usually employed in shield launching sections due to shallow burial depths and poor stratigraphic conditions. Hence, grouting reinforcement provides an increase in buried depth and better formation conditions. The length of prereinforcement is often determ...

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