Experimental and Numerical Investigation for Vertical Stress Increments of Model Piled Raft Foundation in Sandy Soil

Ateş, Bayram; Şadoğlu, Erol

doi:10.1007/s40996-021-00618-7

Cited by 12 publications

(5 citation statements)

References 22 publications

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“…3D FEM modeling can be implemented when boundary conditions can be reliably established [25,26]. Besides, The 3D analyses using ABAQUS 3D performed more thorough parametric studies that took precise geometry into account [27,28].…”

Section: Slope Modelingmentioning

confidence: 99%

Double-Row Pile Reinforcing on a Critical Slope at National Road in Tabanan, Bali

Munawir

2024

GEOMATE

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Due to heavy rain, a landslide occurred on the high slope at the National Road in Tabanan, Bali, and is forecasted to reoccur. Thus, the double-row piles will be analyzed as an alternative method to improve allowable bearing capacity (qa) and slope stability to mitigate this area. This study used various 2D and 3D numerical modeling techniques to analyze the slope model under two variables: the installment of parallel and nonparallel (zigzag) pile configurations and variations in a second-row pile diameter. With the smallest diameter (D = 0.3 m), the first row of piles has a diameter of 0.6 m and a pile spacing of (s) = 4D. The reinforcing piles were installed into the actual slope model. In addition, the second-row pile diameter varies from 0.3 to 0.6 m. Considering the standardized traffic load, PLAXIS and ABAQUS were implemented to numerically analyze the factor of safety (FS) and qa of the 2D and 3D finite element method (FEM). Compared with the unreinforced reinforcement of two rows of piles arranged in parallel, the FS increased significantly by 33.06% in the 2D FEM and 32.82% in the 3D FEM. Yet, the model with a zigzag configuration enhanced the FS by 33.20% in the 3D FEM. However, the numerical models showed a slight improvement in the qa in both 2D and 3D FEM. The slope model defined the highest FS and qa with pile diameter, D2 = 0.6 m (P2D1). Additionally, a rotational type of failure occurred on the slope toe.

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Section: Slope Modelingmentioning

confidence: 99%

Double-Row Pile Reinforcing on a Critical Slope at National Road in Tabanan, Bali

Munawir

2024

GEOMATE

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“…The literature also mention that, the effects of relative density, number of piles, load eccentricities and other parameters on the performance of piled raft foundations were studied through experiments and numerical modeling [10,11]. The ultimate bearing capacity of the piled raft system was in uenced by these parameters, with relative density being the most effective [12,13]. The behavior of piled-raft foundation in sandy soil under combined vertical (V), horizontal (H) and moment (M) loading shows that the number of settlement-reducing piles had a signi cant effect on the load improvement ratio and the differential settlement ratio [14,15].…”

Section: Literature Reviewmentioning

confidence: 99%

Soil-Solid Raft Interaction Analysis Subjected To Seismic Forces

Prabhu¹,

Mutalikdesai²

2023

Preprint

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The response of a raft foundation to seismic loading, and examines the changes in soil consideration and importance factor suggested in the latest seismic codes, IS 1893-2002 and IS 1893-2016. The two methods of analysis suggested by IS 2950-1981 code, rigid and flexible approaches for vertical and evenly distributed loads are examined. Literature review reveals that soil-structure interaction and finite element analysis are used in analysis and design of raft foundation. A case study is conducted to compare the manual calculations and rigid method with finite element methods and soft computing techniques. The results of the study conclude that the deflection, bending moment and soil pressure per meter width are effectively expressed in terms of relative stiffness factor, and that the magnitude of maximum bending moment increases with increase in the relative stiffness. The established variation patterns of contact pressures may not be applicable for raft under dynamic loading condition.

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“…In Chapter 2, nine different geometrical parameters of squeezed branch piles are obtained by conducting orthogonal experimental designs. In order to further investigate and verify the conclusions about the regularity of the compressive performance of the squeezed branch piles, this chapter will first perform numerical simulations of the compressive performance of the nine types of piles by using the finite element software ABAQUS 27,28 for the analysis. The results of the orthogonal test design are analyzed, and two software programs, IBM SPSS Statistics www.nature.com/scientificreports/ and Orthogonal Design Assistant, are used for data processing and analysis, and then the optimal or better combination of factor levels is determined, and the weights of different factors on the test results are ranked to summarize the major and minor factors affecting the vertical compressive performance of piles.…”

Section: Finite Element Analysis Of Compressive Resistance Capabiliti...mentioning

confidence: 99%

Multi-objective design and optimization of squeezed branch pile based on orthogonal test

Wang,

Zhao,

Zhang

2023

Sci Rep

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In recent years, the emergence of the squeezed branch pile has presented a new avenue for civil engineering, offering a distinctive structure and favorable mechanical characteristics. Squeezed branch piles have strong compressive, uplift, and horizontal load resistance capabilities. Due to the existence of discs, the geometric parameters of squeezed branch piles are abundant but important. This article selects number of discs, disc diameter, disc squeeze angle, and disc spacing as the main influencing factors on the bearing capacity of squeezed branch piles and conducts a qualitative analysis of their mechanical properties. The aim of this article is to analyze the different bearing performances of squeezed branch piles through orthogonal experimental design, simulate test conditions using finite element software ABAQUS, obtain relevant data, and finally determine the weight ranking and optimal combination of influencing factors through range analysis to provide better guidance for engineering practices. Through multi-objective optimization design, six optimization objectives including compressive performance, compressive economic efficiency, uplift performance, uplift economic efficiency, maximum horizontal displacement and maximum bending moment of pile body were analyzed. The analysis methods used included comprehensive balance method, queue scoring method, principal component analysis method, entropy weight method, and analytic hierarchy process. The conclusions obtained are similar, and based on the judgment, the squeezed branch pile with 4 discs, disc diameter of 2.5D, disc squeeze angle of 35°, and disc spacing of 3D is considered as the optimal combination under consideration of all optimization objectives.

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Experimental and Numerical Investigation for Vertical Stress Increments of Model Piled Raft Foundation in Sandy Soil

Cited by 12 publications

References 22 publications

Double-Row Pile Reinforcing on a Critical Slope at National Road in Tabanan, Bali

Double-Row Pile Reinforcing on a Critical Slope at National Road in Tabanan, Bali

Soil-Solid Raft Interaction Analysis Subjected To Seismic Forces

Multi-objective design and optimization of squeezed branch pile based on orthogonal test

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