The Effect of Redistribution of the Mixing Water of the Concrete Lining on its Quality

Abstract:

In the heart of the processes of formation of physical and mechanical properties of secondary lining of underground structures is the residual water-cement ratio, which indicates the extraction of the mixing water of the concrete mixture under the action of external pressure forces. This article examines the nature of the redistribution of the mixing water in the concrete lining of the tunnels. Under the influence of radial and axial forces from laid concrete mix there is an increase in water-cement ratio in the direction from the sole to the vault head of the tunnel. This leads to deterioration of physical and mechanical properties of the lining in the roof part of the tunnel. When calculating the strength and water resistance of the secondary concrete tunnel lining the characteristics of the concrete type by strength and waterproof, adjusted by the weakest part of the lining – its roof part – should be taken into account. The analysis of influence on the technology of erection of the lining is given.

• Periodical: Applied Mechanics and Materials (Volume 843)
• Pages: 103-110
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.843.103
• Online since: July 2016
• Authors: Yuri Kulikov
• Keywords: Block Lining, Concrete, Concrete Mix, Method of Construction, Quality, Tunnel, Water-Cement Ratio

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