In:
The Open Civil Engineering Journal, Bentham Science Publishers Ltd., Vol. 16, No. 1 ( 2022-12-05)
Abstract:
This study presents a numerical solution for determining the limiting uniform normal pressure acting horizontally behind cohesive-frictional backfill material in a deep contiguous piled wall. At this limiting pressure, the soil tends to flow out in gaps between a series of vertical piles placed at a certain uniform horizontal spacing. Methods: The lower and upper bound plane strain finite element limit analysis (FELA) has been carried out for this purpose. The Mohr-Coulomb failure criterion, using an associated flow rule, was employed to impose the yield condition in the soil mass. Results: A parametric study was carried out to obtain the magnitude of the non-dimensional limiting lateral resistance ( F / cD ) as a function of normalized pile spacing ( S/D ), the friction angle of soils ( ϕ ), and the adhesion factor ( δ ) at the soil-pile interface; here, F refers to the lateral normal resistance (force) per unit length offered by the pile, S forms the clear spacing between piles, D is the diameter of the pile and c is soil cohesion. The impact of the different parameters on the failure mechanisms has been examined comprehensively. Conclusion: The lateral resistance ( F / cD ) offered by the piles increases generally with a decrease in the spacing between the piles. The magnitude of F / cD increases further with an increase in the values of ϕ and δ .
Type of Medium:
Online Resource
ISSN:
1874-1495
DOI:
10.2174/18741495-v16-e2209080
Language:
English
Publisher:
Bentham Science Publishers Ltd.
Publication Date:
2022
detail.hit.zdb_id:
2396167-3
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