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Behaviour of granular materials reinforced by continuous threads

1989; Elsevier BV; Volume: 7; Issue: 1-2 Linguagem: Inglês

10.1016/0266-352x(89)90008-6

1873-7633

Pascal Villard, Pierre Jean Jouve,

Geotechnical Engineering and Soil Mechanics

The experimental research carried out on soil reinforcement has resulted in the creation of a new product composed of sand and continuous fibres. In this paper, we propose a numerical model which fully describes the behaviour of the material. The main hypothesis, based on experimental considerations, has led us to divide the material into two intimately interwoven parts : a granular matrix and a network of continuous threads. Their behaviours are respectively described by a law of elastoplasticity (proposed by Vermeer) for the matrix, and by a non-linear relation integrating all characteristics of threads. Two programs, using the finite element method, have been developed. The first, which deals with the axial-symmetrical problems, allows comparison between modelling and triaxial test results. The second program, adapted to plane strain problems, allows calculations for the retaining walls and banks. The results obtained open up possibilities for its development in the design of reinforced structures.