Plugging effect on uplift capacity of pipe-piles installed in loose sand

2013 ◽  
pp. 801-806 ◽  
Author(s):  
R Reis ◽  
F Saboya ◽  
D Neves ◽  
S Tibana ◽  
A Manhães ◽  
...  
Keyword(s):  
Loose Sand ◽  
Uplift Capacity

Performance of piles with enlarged bases subject to uplift forces

1990 ◽  
Vol 27 (5) ◽  
pp. 546-556 ◽  
Author(s):  
E. A. Dickin ◽  
C. F. Leung
Keyword(s):  
Empirical Equation ◽  
Slip Surface ◽  
Surface Model ◽  
Loose Sand ◽  
Uplift Capacity ◽  
Base Diameter ◽  
Dense Sand ◽  
Centrifuge Tests ◽  
Anchor Plates ◽  
Uplift Forces

The influence of embedment, base diameter, and backfill density on the uplift behaviour of piles with enlarged bases embedded in sand was investigated in a centrifuge. Comparitive tests on straight-shafted piles are also reported. For piles in dense sand, sensible agreement was found with earlier research on anchor plates and published field data. However, uplift capacities in loose sand were considerably lower than previously observed for anchor plates. A number of theories for anchors considerably overpredict the observed capacity for belled piers in both dense and loose sand, although in the case of dense sand, reasonable values are obtained using an empirical equation derived from centrifuge tests on anchor plates and a finite element based design approach. The normally conservative vertical slip-surface model is alone in providing reasonable agreement with the surprisingly low observations for piles in loose sand. Key words: piles, uplift capacity, centrifuge tests, sand.

Effects of deviator strain histories on liquefaction of loose sand using DEM

2021 ◽  
Vol 136 ◽  
pp. 104213
Author(s):  
Minyi Zhu ◽  
Guobin Gong ◽  
Jun Xia ◽  
Lianfeng Liu ◽  
Stephen Wilkinson
Keyword(s):  
Loose Sand

scholarly journals Uplift Capacity of Rigid Steel Pile Groups in Clay

1985 ◽  
Vol 25 (4) ◽  
pp. 117-122 ◽  
Author(s):  
Braja M. Das ◽  
Mohammad Farooq Azim
Keyword(s):  
Uplift Capacity ◽  
Pile Groups

Undrained uplift capacity of deeply embedded strip anchors in non-uniform soil

2015 ◽  
Vol 70 ◽  
pp. 41-49 ◽  
Author(s):  
S.B. Yu ◽  
J.P. Hambleton ◽  
S.W. Sloan
Keyword(s):  
Uplift Capacity

Reliability analysis of static liquefaction of loose sand using the random finite element method

2015 ◽  
Vol 32 (7) ◽  
pp. 2100-2119 ◽  
Author(s):  
Ali Johari ◽  
Jaber Rezvani Pour ◽  
Akbar Javadi
Keyword(s):  
Finite Element ◽  
Pressure Ratio ◽  
Monotonic Loading ◽  
Unit Weight ◽  
Soil Parameters ◽  
Loose Sand ◽  
Element Analysis ◽  
Content Type ◽  
Static Liquefaction ◽  
Random Finite Element

Purpose – Liquefaction of soils is defined as significant reduction in shear strength and stiffness due to increase in pore water pressure. This phenomenon can occur in static (monotonic) or dynamic loading patterns. However, in each pattern, the inherent variability of the soil parameters indicates that this problem is of a probabilistic nature rather than being deterministic. The purpose of this paper is to present a method, based on random finite element method, for reliability assessment of static liquefaction of saturated loose sand under monotonic loading. Design/methodology/approach – The random finite element analysis is used for reliability assessment of static liquefaction of saturated loose sand under monotonic loading. The soil behavior is modeled by an elasto-plastic effective stress constitutive model. Independent soil parameters including saturated unit weight, peak friction angle and initial plastic shear modulus are selected as stochastic parameters which are modeled using a truncated normal probability density function (pdf). Findings – The probability of liquefaction is assessed by pdf of modified pore pressure ratio at each depth. For this purpose pore pressure ratio is modified for monotonic loading of soil. It is shown that the saturated unit weight is the most effective parameter, within the selected stochastic parameters, influencing the static soil liquefaction. Originality/value – This research focuses on the reliability analysis of static liquefaction potential of sandy soils. Three independent soil parameters including saturated unit weight, peak friction angle and initial plastic shear modulus are considered as stochastic input parameters. A computer model, coded in MATLAB, is developed for the random finite element analysis. For modeling of the soil behavior, a specific elasto-plastic effective stress constitutive model (UBCSAND) was used.

Bearing Capacity of Foundations with Inclusion of Dense Sand Layer over Loose Sand Strata

2017 ◽  
Vol 17 (10) ◽  
pp. 06017018 ◽  
Author(s):  
Vishwas N. Khatri ◽  
Jyant Kumar ◽  
Shamim Akhtar
Keyword(s):  
Bearing Capacity ◽  
Loose Sand ◽  
Sand Layer ◽  
Dense Sand

Uplift Capacity and Impact Resistance of Roof Tiles

2011 ◽  
Vol 16 (3) ◽  
pp. 121-129 ◽  
Author(s):  
Caesar Abi Shdid ◽  
Amir Mirmiran ◽  
Ton-Lo Wang ◽  
Diego Jimenez ◽  
Peng Huang
Keyword(s):  
Impact Resistance ◽  
Uplift Capacity
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