期刊
GEOTECHNIQUE
卷 73, 期 8, 页码 667-688出版社
EMERALD GROUP PUBLISHING LTD
DOI: 10.1680/jgeot.21.00119
关键词
cohesive soils; design; geosynthetics; reinforced soils; upper bound limit analysis
资金
- Brazilian National Council for Scientific and Technological Development (CNPq)
- EU [778360]
A semi-analytical method has been developed to consider the contribution of the facing element in the stability of geosynthetic reinforced soil walls. The analysis reveals that accounting for cohesion and the presence of the facing element can lead to savings in the amount of reinforcement required.
Where granular materials are not easily available, local cohesive soils are increasingly employed in geosynthetic reinforced soil walls as a cheap and sustainable option. Conventional design methods do not yet account for the beneficial effect of cohesion in reducing the amount of required reinforcement. Similarly, the contribution of the face to stability is rarely accounted for, despite plenty of experimental evidence in its favour. In this paper, a semi-analytical method based on limit analysis is developed for the design of reinforced soil walls in frictional-cohesive backfills accounting for the wall contribution. A parametric analysis was conducted to evaluate the effect of soil cohesion and friction angle, facing batter, block width, location of the reaction force acting on the face, facing-backfill interface friction, facing-foundation interface friction and reinforcement length. Dimensionless design charts providing the required amount of reinforcement for lengths recommended in design standards are provided for both uniform and linearly increasing reinforcement distributions. It emerges that accounting for the presence of cohesion and the facing element can lead to significant savings in the overall level of reinforcement, and that tension cracks can be particularly detrimental to wall stability for highly cohesive soils so they cannot be overlooked in the design.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据