Embedment

About: Embedment is a research topic. Over the lifetime, 2441 publications have been published within this topic receiving 31444 citations.

Behavior of a shallow plate anchor in clay under sustained loading

Abstract: Laboratory model test results for the uplift of a shallow circular plate anchor embedded in a soft saturated clay are presented. For all tests the bottom of the anchor plate was vented to eliminate the mud suction force. The tests were divided into two categories: (1) short‐term tests to determine the variation of the net ultimate uplift capacity and hence the breakout factor with embedment ratio, and (2) creep tests with sustained uplift loads at varying embedment ratios. Based on the model test results, the variation with time, has been determined for the rate of strain of the soil located above the plate anchor. Empirical relationships for obtaining the rate of anchor uplift have been proposed.

Evaluation of Shape Effects for Rectangular Anchors in Dense Sand: Model Tests and 3D Finite-Element Analysis

Abstract: In this study, three-dimensional finite element models, incorporating an elastoplastic material model coupled with isotropic simple softening law, nonassociated flow rule, and shear-band effect, are validated for the evaluation of the shape effect of the square and rectangular vertically uploaded anchor foundations embedded in dense Toyoura sand with embedment ratio of 2 and width of 50 mm. The proposed numerical model has closely predicted experimental uplift load-displacement relationships. The shape effects on the results are also discussed in relation to the progressive failure around the foundations and the shape of the failure boundaries on the ground surface.

Vertical vibration of piles in viscoelastic non-uniform soil overlying a rigid base

Abstract: This paper presents an analytical methodology that provides the dynamic response of an elastic pile embedded in viscoelastic non-uniform soil overlying a rigid base, when subjected to a harmonic vertical load. The non-uniform soil comprises two parts, featuring independent properties: the substratum soil, below the pile toe, is represented by a viscoelastic layer of finite thickness resting on rigid bedrock, while the soil surrounding the pile shaft is modelled as a series of infinitesimally thin independent viscoelastic layers. Following validation of the methodology, where we show that the presented solution degenerates to published solutions for simpler pile embedment conditions, we use results of a parametric investigation to discuss the mechanisms governing the dynamic response of the non-uniform soil–pile system. The presented solution allows modelling realistically the contribution of end-bearing resistance to vertical vibrations of piles in cases of practical interest when non-linearity effects can be effectively ignored.

Effect of Embedment on the Vertical Bearing Capacity of Bucket Foundations in Clay

Abstract: To evaluate the undrained behaviour of bucket foundations installed on Yoldia clay, 100 tests on bucket foundations subject to vertical and moment loadings were conducted at Aalborg university geotechnical centre. Bucket foundations are tubular steel foundations that are installed by sealing the top and applying suction inside the bucket. The hydrostatic pressure difference and the deadweight cause the bucket to penetrate the soil. In the present study, results of an experimental study addressing the effect of embedment (skirt length to the diameter) on the undrained bearing capacity of bucket foundations under vertical loading are reported. The field tests have been accompanied by the finite element numerical simulations in order to provide better understanding of influential parameters on the behavior of bucket foundations. RÉSUMÉ Pour évaluer le comportement non drainé des fondations seau installé sur terre battue Yoldia, 100 tests sur des bases seau sujet à des charges verticales et le moment ont été menées au centre de l'Université d'Aalborg géotechnique. Seau fondations sont des fondations en acier tubulaire qui sont installés par sceller le dessus et d'appliquer le vide à l'intérieur du seau. La différence de pression hydrostatique et le port en lourd cause le seau à pénétrer dans le sol. Dans la présente étude, les résultats d'une étude expérimentale portant sur l'effet d'encastrement (longueur de la jupe au diamètre) sur la capacité portante des fondations non drainées seau sous chargement vertical sont signalés. Les essais au champ ont été accompagnés par les simulations numériques par éléments finis afin d'assurer une meilleure compréhension des paramètres influents sur le comportement des fondations seau.