Model Test Investigation of Rock-Fall Impaction to Cut-and-Cover Tunnel Arch Structure

Abstract:

On conditions of different weight，height, shape, slope gradient and the property of slope surface, the tunnel portal structure’s strain evoked by rock-fall impaction has been researched in laboratory by using a 1/30 scale similar model. The study shows that there is a simple linear relationship between the structure’s strain , the rock weight and the rockfall height when the slope gradient is specific and the slope surface is slippery and the multiple linear relationship between the structure’s strain , the rock weight and the rockfall height has been obtained. Effect of the shape of the rockfall and the property of slope surface on structure’s strain has been analyzed; The distribution characteristics of the structure’s strain of different parts of one cross-section and the same parts of different cross-sections has been comparative analyed.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 2492-2499
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.2492
• Online since: September 2011
• Authors: Yu Suo Wang, Jian Hui Tang, Tao Yan, Ju Mei Zhao
• Keywords: Cut-and-Cover Tunnel, Regression Analysis, Rock-Fall Impaction, Strain

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