scholarly journals Evaluation of the Bearing Capacity of Sandy Soils with Analytical and Numerical Methods

2020 ◽  
Author(s):  
Emrah DAĞLI ◽  
Ömer Faruk ÇAPAR
Keyword(s):  
Numerical Methods ◽  
Bearing Capacity ◽  
Sandy Soils

scholarly journals Bearing Capacity of Circular Footing on Sand Deposit

2015 ◽  
Vol 773-774 ◽  
pp. 1518-1523 ◽  
Author(s):  
Aminaton Marto ◽  
Mohsen Oghabi ◽  
Nor Zurairahetty Mohd Yunus
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Experimental Test ◽  
Static Load ◽  
Sandy Soils ◽  
Soil Parameters ◽  
Test Results ◽  
Finite Element Software ◽  
Sand Deposit ◽  
Circular Footing

Bearing capacity and settlement are two important parameters in geotechnical engineering. The bearing capacity of circular foundations on sandy soils is important to geotechnical practicing engineers. Design of foundations includes soil parameters and bearing capacity of foundation. This paper presents the results of laboratory experimental model tests of circular footings supported on sand deposit under static load. The finite element software Abaqus is used to compare the results. The effects of the relative density of the sand (30%, 50%, and 70%) and the diameter of circular footing (75 mm and 100 mm) are investigated. It can be concluded that the experimental test results fit quite well with the results of numerical method.

Numerical Analysis of the Influence of Vertical Load on the Horizontal Bearing Capacity of Single Pile

2011 ◽  
Vol 374-377 ◽  
pp. 1947-1952 ◽  
Author(s):  
Zhao Yun Xiao ◽  
Guo Xun Zhang ◽  
Wei Xu ◽  
Zhong Ming Xue
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Pile Foundation ◽  
Sandy Soils ◽  
Single Pile ◽  
Horizontal Load ◽  
Clayey Soils ◽  
Vertical Load ◽  
Concrete Pile ◽  
Finite Element Numerical Simulation

It is a complicated progress of interaction between pile and soil when pile is under both vertical load and horizontal load. This paper analyzes the variation of stress, strain, deformation and deflection of the pile body by finite element numerical simulation of single bored concrete pile under vertical load together with horizontal load. Based on the existing research results, conclusions could be that the vertical load can increase horizontal bearing capacity of the pile in sandy soils, but horizontal bearing capacity of the pile in clayey soils is more complicated. Hope that the simulation can provide some references for the design of pile foundation.

scholarly journals Analytical and numerical methods for prediction of the bearing capacity of shallow foundations in unsaturated soils

2021 ◽  
Vol 44 (3) ◽  
pp. 1-18
Author(s):  
Sai Vanapalli ◽  
Won-Taek Oh
Keyword(s):  
Numerical Methods ◽  
Bearing Capacity ◽  
Unsaturated Soils ◽  
State Of The Art ◽  
Geotechnical Engineering ◽  
Shallow Foundations ◽  
Saturated Soils ◽  
Engineering Practice ◽  
Total Stress ◽  
Rational Understanding

Bearing capacity of saturated soils can be estimated using effective or total stress approaches extending the concepts proposed by Terzaghi (1943) and Skempton (1948), respectively. Recent studies have shown that similar approaches (i.e., Modified Effective Stress Approach, MESA and Modified Total Stress Approach, MTSA) can be used for interpretation and prediction of the bearing capacity of unsaturated soils by considering the influence of matric suction. However, comprehensive discussion for the application of the MESA and the MTSA in geotechnical engineering practice applications is lacking in the literature. For this reason, in this state-of-the-art paper, the background associated with the MESA and MTSA is first introduced. The analytical and numerical methods available for the prediction of the bearing capacity of unsaturated soils from the literature are revisited. The various available methods are explained by categorizing them into two groups: MESA and MTSA along with their applications using examples. The focus of this state-of-the-art paper is directed towards not only for providing tools for rational understanding but also for better prediction of the bearing capacity of unsaturated soils for extending them in geotechnical engineering practice applications.

Evaluating the bearing capacity of driven piles in sandy soils

1977 ◽  
Vol 14 (1) ◽  
pp. 28-30
Author(s):  
A. M. Aronov ◽  
Yu. S. Gudakov
Keyword(s):  
Bearing Capacity ◽  
Sandy Soils ◽  
Driven Piles

EXPERIMENTAL EVALUATION OF SOIL REINFORCEMENTS IN UNPAVED ROAD

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Nahla Salim
Keyword(s):  
Bearing Capacity ◽  
Static Load ◽  
Sandy Soils ◽  
Crushed Stone ◽  
Unit Weight ◽  
Harmonic Load ◽  
Geogrid Reinforcement ◽  
Dry Unit Weight ◽  
Load Tests ◽  
Number Of Cycles

In this study, a series of 24 laboratory tests were conducted on a footing resting on crushed stone with 17.68 kN/m3 dry unit weight overlying sandy soils of two relative densities corresponding to (60% and 80%). The subbase layer is of crushed stone with a thickness of 5, 7.5 and 10 cm. Ten tests were conducted under static load with and without geogrid. All the other 14 model tests were carried out under harmonic load which was applied in a sequence determined prior (40% of static load). Tests were conducted at (2) Hz frequency according to the loading value. The process of the loading was continued until the number of cycles reached 104. The results indicated that, for static load and with the inclusion of the geogrid, as the thickness of the subbase layer increases, the percentage of increase in bearing capacity was reduced. In general, using geogrid reinforcement with subbase thickness of 7.5 and 5 cm causes an increase in bearing capacity approximately 1.5 to 2 times greater than for unreinforced respectively. This means that by using geogrid reinforcement, the thickness of subbase can be reduced which causes a reduction in construction cost.

scholarly journals Analysis of the stressed-strained state of the foundation-shell at interaction with the elastic-plastic medium

2021 ◽  
pp. 105-112
Author(s):  
Maksym Vabishchevich ◽  
Gherman Zatyliuk
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Methods ◽  
Bearing Capacity ◽  
The Finite Element Method ◽  
Plastic Medium ◽  
Soil Base ◽  
Elastic Plastic ◽  
The Impact ◽  
Element Method

On the basis of modern numerical implementations of the finite element method the article presents the justification of the adequacy of the method of solving the problems of structures straining in their contact interaction with the elastic-plastic nonlinear soil medium. Compatible calculations of structures and nonlinear bases, which are described by modern mechanical and soil models within one problem is a significant technical problem. The solution of the assigned tasks is possible only within the framework of numerical methods, the most common of which is the finite element method (FEM). The construction of the computational finite element model raises many complex questions that require additional detailed study. In addition, the compliance with the state building norms and regulations is an important factor for further practical use. The use of numerical methods in the calculation of machines and structures, taking into account their interaction with the elastic-plastic medium is largely determined by the complexity or even impossibility of analytical calculation due to the complexity of structural schemes, heterogeneity of material features, uneven soil layers, implementation of step-by-step work execution technologies and so on. The combination of the latest achievements in the field of structural mechanics and soil mechanics is a promising direction for the development of effective approaches to building discrete models of space systems “structure-nonlinear base” for solving applied problems. The use of the developed method allows to significantly specify the structures stress state interacting with the soil base, and to significantly specify the impact on the calculated level of the base bearing capacity. Only the simultaneous consideration of the nonlinear resistance of the soil base together with the plasticity and the structure destruction in the numerical simulation of the foundation-shell load provided good agreement with the natural experiment data as to the type of the boundary state and the bearing capacity level.

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