Pullout Capacity Of Pile Research Articles

Pullout Capacity of Piles in Unsaturated High Plasticity Clayey Soil: An Experimental Model Study

Pullout Capacity of Piles in Unsaturated High Plasticity Clayey Soil: An Experimental Model Study

Experimental investigation on pullout capacity of model pile in Cohesionless Deposits

In this project, an experimental study is made on pile pullout capacity, varying the diameter of the pile (d), Length to diameter ratio (L/d), the effect of pile inclination or batter angle (α), nature of the pile surface by placing the pile in cohesionless soils. The experimental values are determined and are compared with case studies in literature. In this project, various literatures on pullout capacity of piles were studied and experiment procedure was derived. Poorly graded river sand was used for cohesionless deposit. The sand is tested for engineering and index properties. Two types of piles, rough and smooth with different lengths were tested at different batter angles. The results are plotted in the graph. These graphs are used for comparative studies of various outcomes of the experiment and results were established.

Surface Friction on Pullout Capacity of Pile in Sandy Soil

At the point when structures are built underneath the ground water table or in the event that they are developed submerged, elevate powers are to be applied on the storm cellar of structures. Likewise on account of transmission line towers, securing frameworks for sea surface or submerged stages, tall stacks and so on are generally exposed to upsetting minutes because of wind, wave weight or ship sway and so forth. These upsetting minutes are moved to structures establishment as pressure on certain components and pullout on others. For establishments in such structures, typically a blend of vertical and hitter heaps is utilized. A huge scale exploratory program utilizing vertical model heaps (Cement Mortar heaps) in sand exposed to pullout loads has been done in a model tank of size 25cm x 25cm x 25cm. Gentle steel of 8 mm measurement is utilized for safe haven reason. PVC funnels of changing breadths, lengths, are utilized for throwing of model heaps. An inadequately reviewed stream sand having explicit gravity G = 2.61, Uniformity coefficient = 3.62, ebb and flow coefficient = 0.91 has been utilized as establishment medium. It is to watch the conduct of sand when heap is exposed to pullout limit. Likewise the pullout limit of heap is resolved with various length to distance across proportions on sand.

Failure Mode and Pullout Capacity of Anchor Piles in Clay

Anchor piles are wildly adopted in mooring systems. However, there are still challenges in predicting the failure mode and pullout capacity of the pile. Previous Finite Element (FE) analysis was all based on the traditional small strain FE analysis. The whole pullout process of the pile cannot be simulated. Hence, the failure mode of the pile is hard to be understood, especially under small loading angles to the horizontal. In addition, theoretical analysis received limited attention in analyzing the failure mode and pullout capacity of anchor piles under inclined loading. In the present work, both Large Deformation Finite Element (LDFE) and theoretical analyses are performed to investigate the failure mode and pullout capacity of anchor piles. The effectiveness of the LDFE analysis is at first verified by model test data. Then, a theoretical method is proposed to predict the Optimal Loading Point (OLP), failure mode and pullout capacity of the pile under inclined loading. Comparative study is also performed between LDFE and theoretical analyses. It is concluded: (1) the proposed theoretical method is effective in predicting the OLP, failure mode and pullout capacity of anchor piles; (2) the OLP is not affected by the length-to-diameter ratio and the failure direction of β>5°, while very sensitive to the soil strength and the loading angle; (3) there is a critical loading angle, below which the pile will be pulled out vertically; and (4) the lateral capacity at the OLP could be more than twice that at the top of the pile.

Study on Design of Uplift Piles According to the Elastic Foundation Beam Theory

Taking the every arranged uplift pile in a practical project for example and selecting the column strip on the scale board as the research object, this paper analysis mainly focuses on the pullout capacity of piles at different locations with different vertical loads from columns by using the Winkler elastic foundation beam model. The results show that design with assumption that uplift piles evenly share the net buoyance would lead to successive failure of the piles. Then further parametric analysis was conducted to study the influence of stiffness, thickness and column space on the vertical forces of piles. The conclusions could provide positive reference to related uplift pile design.