Bi-layer diaphragm walls: structural and sectional analysis

    Luis Segura-Castillo Affiliation
    ; Antonio Aguado Affiliation
    ; Albert De La Fuente Antequera Affiliation
    ; Alejandro Josa Affiliation


The bi-layer diaphragm wall, a new slurry wall type designed to cope with the problem of watertightness is studied in this paper. These walls consist of two bonded concrete layers, the first, a conventional Reinforced Concrete (RC) diaphragm wall, and the second, a Sprayed Steel Fibre Reinforced Concrete (SFRC). The main objective of this paper is to analyze the structural and sectional behaviour of these walls. A study in the form of an uncoupled structural-section analysis based on various hypothetical cases of bi-layer diaphragm walls was performed to fulfil the objective. It is concluded that there exists a potential of reduction in the reinforcement of the RC layer through the structural use of the SFRC layer. However, when the reduction is quantified, even though a reduction of between 3.2% and 1.7% in the RC reinforcement is confirmed, it appears insufficient to offer a cost-effective solution. Nonetheless, the system becomes a promising solution when particular conditions are taken into account, such as basement space limitations.

First published online: 04 Sep 2015

Keyword : waterproof, diaphragm walls, fibre concrete, sprayed concrete, numerical analysis, FEM, PLAXIS

How to Cite
Segura-Castillo, L., Aguado, A., De La Fuente Antequera, A., & Josa, A. (2016). Bi-layer diaphragm walls: structural and sectional analysis. Journal of Civil Engineering and Management, 22(5), 645-654.
Published in Issue
May 17, 2016
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