Abstract
Abstract Soil is weak in tension but strong in compression. The resistance to tensile deformation of soil is given by the tensile force of the reinforcement in the reinforced soil, and the tensile force of the reinforcement is generated by the frictional force at the soil-reinforcement interface. When the soil-reinforcement is effectively interacted by the compaction, the deformation of the soil becomes equal to the tensile deformation of the reinforcement material, which means that the soil is bound to the tensile force of the reinforcement material and thus has a great resistance to the tensile deformation. Therefore, compaction is one of the major parameters affecting the behavior of the mechanically stabilized earth (MSE) wall. In this study, a series of numerical analyses was performed to investigate the compaction effect on the behavior of the MSE walls. The results showed that the horizontal displacement of the MSE wall significantly increased during the construction and decreased because of surcharge load application after the construction. In addition, the strains of reinforcement increased significantly during the construction and decreased slightly because of surcharge load application after the construction. Therefore, it is important to consider the compaction loads when modeling the MSE walls, so that the lateral displacement at wall facing will not be underestimated during construction and will not be overestimated because of surcharge load application after the construction.
Highlights
Soil is weak in tension but strong in compression
There are 12 mechanically stabilized earth (MSE) wall models that were simulated in Plaxis 3D using finite element method (FEM) to analyze the effects of compaction load on the behavior of the panel-type MSE wall considering three different types of reinforcements subjected to different compaction loads during construction and a surcharge load after the construction
The horizontal displacements at wall facing were influenced by the application of compaction loads
Summary
Abstract: Soil is weak in tension but strong in compression. The resistance to tensile deformation of soil is given by the tensile force of the reinforcement in the reinforced soil, and the tensile force of the reinforcement is generated by the frictional force at the soil-reinforcement interface. Bathurst et al [11], Ehrlich et al [12], and Mirmoradi and Ehrlich [13] conducted an experimentation on geogrid-reinforced soil (GRS) wall and the effects of compaction near the facing considering light compaction and heavy compaction, and applied surcharge loading. The findings in their experiments showed that compaction promoted lateral displacement during the construction and reduced lateral displacement because of surcharge load application after construction.
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