scholarly journals Bearing Capacity of Single Pile-Friction Wheel Composite Foundation on Sand-over-Clay Deposit under V-H-M Combined Loadings

2021 ◽  
Vol 11 (20) ◽  
pp. 9446
Author(s):  
Yikang Wang ◽  
Xinjun Zou ◽  
Jianfeng Hu
Keyword(s):  
Bearing Capacity ◽  
Parametric Study ◽  
Numerical Models ◽  
Design Procedure ◽  
Composite Foundation ◽  
Soil Conditions ◽  
Single Pile ◽  
Centrifuge Testing ◽  
Vertical Loading ◽  
Potential Factors

This paper presents numerical modelling to investigate the bearing capacities and failure mechanisms of single pile-friction wheel composite foundation in sand-overlying-clay soil conditions under combined V-H-M (vertical-horizontal-moment) loadings. A series of detailed numerical models, with validations of centrifuge testing results, are generated to explore the potential factors influencing the bearing capacity of this composite system. Intensive parametric study is then performed to quantify the influences of the foundation geometry, soil properties, sand layer thickness, pre-vertical loading and lateral loading height on the failure envelopes in the V-H-M domain. Last but not least, an empirical design procedure is proposed based on a parametric study to predict the bearing capacity of this composite foundation under various loading conditions, which can provide guidance for its design and application.

Dynamic and Static Study on Bearing Capacity of Reinforced Mixing Pile Composite Foundation

2012 ◽  
Vol 256-259 ◽  
pp. 612-615
Author(s):  
Gui Lin Sheng ◽  
Ya Ge Zhang
Keyword(s):  
Bearing Capacity ◽  
Seismic Response ◽  
Axial Stress ◽  
Bending Moment ◽  
Composite Foundation ◽  
Single Pile ◽  
Ultimate Capacity ◽  
Ansys Software ◽  
Length And Area ◽  
Pile Length

The axial stress and axial displacement distribution curves of reinforced mixing single pile are researched by ANSYS software; and the differences of the single pile ultimate capacity of reinforced mixing pile between different core pile length and area replacing ratio are analyzed; It compared and analyzed envelope diagrams of bending moment and shear of reinforced mixing pile in different core pile length and area replacing ratio under seismic response. Some conclusions which may be of some value for design and construction of reinforced mixing pile composite foundation are drawn

scholarly journals Experimental study on horizontal bearing capacity of enlarged cap-group pile composite foundation

2019 ◽  
Vol 136 ◽  
pp. 04066
Author(s):  
Taihao Chen ◽  
Yiming Xu ◽  
Jie Chen
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Load Sharing ◽  
Composite Foundation ◽  
Single Pile ◽  
Horizontal Load ◽  
Horizontal Resistance ◽  
Pile Cap ◽  
Large Wind ◽  
Group Pile

In order to provide reference for the engineering design in the area with large wind, water flow and other horizontal loads, the experimental study on the horizontal bearing capacity of composite foundation under three different working conditions was carried out in this paper, which includes cap-single pile, cap-9 piles and enlarged cap-9 piles. The results show that under the condition of cap-9 piles, the group pile effect coefficient is 1.17, and the load sharing ratio of the back piles is the largest, and the middle and front piless decrease sequentially. Also, with the increase of horizontal load, the load sharing ratio of the back pile increases while the middle and front piless is decremented. Under the condition of enlarged cap-9 piles, the group pile effect coefficient is 1.36, which is 16.24% higher than that of the cap-9 piles, which means the horizontal resistance is obviously enhanced. At the same time, compared with the cap-9 piles, the load sharing ratio of the back pile is reduced while the middle and front piless is increased, which means the stress of pile body tends to be more uniform.

BEHAVIOR OF AN OVERPASS CARRIED ON FOOTINGS AND FRICTION PILES

1969 ◽  
Vol 6 (4) ◽  
pp. 369-382 ◽  
Author(s):  
L. S. Brzezinski
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Group Action ◽  
Undrained Shear Strength ◽  
Load Test ◽  
Soil Conditions ◽  
Single Pile ◽  
Marine Clay ◽  
Friction Pile ◽  
Undrained Shear

A long overpass structure with 32 piers between abutments was founded on strip footing and friction pile foundations in a deep marine clay subsoil of firm consistency. The piles were steel H-sections which were provided at the construction stage at 6 pier locations in lieu of footings because of unfavorable soil conditions exposed during excavation. A load test to failure on a single pile indicated the pile–soil adhesion to be considerably lower than the undrained shear strength of the clay.Post-construction observations indicated the settlement of the pile-supported piers to be about 50% that of the adjacent footing supported piers. The settlements of both types of foundations were small and within tolerable limits. The design approaches used for prediction of footing settlements and the group action of friction piles in bearing capacity and settlement are presented in the paper.

Numerical Investigation of the Installation Process and the Bearing Capacity of Suction Bucket Foundations

2015 ◽  
Author(s):  
Marc Stapelfeldt ◽  
Julian Bubel ◽  
Jürgen Grabe
Keyword(s):  
Bearing Capacity ◽  
Design Procedure ◽  
Soil Conditions ◽  
Detailed Knowledge ◽  
Offshore Platforms ◽  
Vertical Load ◽  
Numerical Investigations ◽  
Numerical Studies ◽  
Parametric Studies ◽  
Bearing Behavior

This paper was developed in cooperation between the TUHH and Overdick GmbH & Co. KG. The goal of the presented work is gaining further knowledge about the installation and bearing behavior of suction bucket foundations for fixed offshore platforms based on sand. Buckets are usually made of steel and consist of a cylinder and a lid at the top. They are installed into the sea floor by pumping water out of the buckets to create suction, which drives the bucket into the soil. Suction buckets do not require heavy hammer-equipment for construction like common piles. Thus the installation procedure is much faster and protects the environment significantly by avoiding noise emissions. Therefore, suction buckets are to be considered as a serious foundation alternative compared to steel piles. For this paper numerical investigations are performed with the finite analyses software ABAQUS. A total of five finite element models — three for the bearing and two for the installation — were created to carry out parametric studies, while using a hypoplastic constitutive model to describe the soil conditions. Therefore, the buckets diameter, embedded depth and the pore-ratio are to be investigated. In addition three different load conditions are applied in the bearing capacity tests: the maximum vertical load, the maximum horizontal load and the minimum vertical load. During the simulation of the installation procedure different pore ratios are tested and it is attempted to simulate an installation by water-extraction. Based on these numerical investigations it is possible to investigate known and currently more or less unknown phenomena of the bearing and the installation of suction buckets. Thus, a more detailed knowledge about the function of this kind of foundation is to be gained. In addition, the numerical studies are compared to the design-procedure according to API RP-2A-WSD and the DNV CN-30.4.

The Unified Solution of Gravel Pile Limit Bearing Capacity of Single Pile Composite Foundation

2013 ◽  
Vol 438-439 ◽  
pp. 1409-1413
Author(s):  
Qing Liu ◽  
Wei Ding ◽  
Ben Wang ◽  
Hong Hai Liu ◽  
Bing Yu Wang
Keyword(s):  
Bearing Capacity ◽  
Composite Foundation ◽  
Engineering Practice ◽  
Single Pile ◽  
Tube Model ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Double Shear ◽  
Tension And Compression ◽  
Gravel Pile

Based on the compaction effect of the gravel pile, the thick-walled tube model is established. Considering the gravel pile and pile materials with different properties of tension and compression of soil pile in the process of expansion, the influence of intermediate principal stress to improving the bearing capacity of foundation in the process of expansion, we use the planar axisymmetric double shear unified strength theory and present a gravel pile ultimate bearing capacity of single pile composite foundation unified expression. The theory study of gravel pile composite foundation and engineering practice has a certain guiding significance.

Research on Design and Application of the CDM Pile

2013 ◽  
Vol 353-356 ◽  
pp. 984-991
Author(s):  
Xiang Guo Kong
Keyword(s):  
Bearing Capacity ◽  
Composite Foundation ◽  
Single Pile ◽  
Foundation Settlement ◽  
Capacity Method ◽  
Design And Application

From the view of design, this paper have discussed some problems of design and application of deep cement mixing pile, and have analyesd the determination of single pile bearing capacity method, the checking of soft stratum, defects or errors existing in the calculation of cement mixing pile of composite foundation settlement, and have put forward some suggestions for improvement.

Parametric study and design procedure for planar silos and hoppers

2021 ◽  
Author(s):  
Evgeny Rabinovich ◽  
Haim Kalman ◽  
Per F. Peterson
Keyword(s):  
Parametric Study ◽  
Design Procedure

scholarly journals Application of Artificial Neural Networks for Predicting the Bearing Capacity of Shallow Foundations on Rock Masses

2021 ◽  
Author(s):  
M. A. Millán ◽  
R. Galindo ◽  
A. Alencar
Keyword(s):  
Bearing Capacity ◽  
Analytical Solutions ◽  
Shear Failure ◽  
Numerical Models ◽  
Computational Effort ◽  
Shallow Foundations ◽  
Geological Strength Index ◽  
Rock Masses ◽  
Ann Model ◽  
Artificial Neural

AbstractCalculation of the bearing capacity of shallow foundations on rock masses is usually addressed either using empirical equations, analytical solutions, or numerical models. While the empirical laws are limited to the particular conditions and local geology of the data and the application of analytical solutions is complex and limited by its simplified assumptions, numerical models offer a reliable solution for the task but require more computational effort. This research presents an artificial neural network (ANN) solution to predict the bearing capacity due to general shear failure more simply and straightforwardly, obtained from FLAC numerical calculations based on the Hoek and Brown criterion, reproducing more realistic configurations than those offered by empirical or analytical solutions. The inputs included in the proposed ANN are rock type, uniaxial compressive strength, geological strength index, foundation width, dilatancy, bidimensional or axisymmetric problem, the roughness of the foundation-rock contact, and consideration or not of the self-weight of the rock mass. The predictions from the ANN model are in very good agreement with the numerical results, proving that it can be successfully employed to provide a very accurate assessment of the bearing capacity in a simpler and more accessible way than the existing methods.

Study and Application on Computational Methods for Ultimate Bearing Capacity of Single Pile

2008 ◽  
Vol 400-402 ◽  
pp. 329-334
Author(s):  
Ze Liang Yao ◽  
Zhen Jian ◽  
Guo Liang Bai
Keyword(s):  
Bearing Capacity ◽  
Computational Methods ◽  
Ultimate Bearing Capacity ◽  
Contact Element ◽  
Computational Formula ◽  
Single Pile ◽  
Foundation Design ◽  
Experiment Method ◽  
Contact Element Method ◽  
Element Method

It is difficult and important to accurately calculate single pile ultimate bearing capacity during pile foundation design. Typical computational methods on single pile ultimate bearing capacity are contrastively analyzed in this paper. Contact element method on single pile ultimate bearing capacity is relatively accurate and economical, but it isn’t used in practical projects until now because its computational process is complicated. 343 different single pile ultimate bearing capacities are calculated with the contact element method in order to study a simple computational formula based on the contact element method. All data calculated are analyzed with a linear recursive multi-analysis program which is programmed with Fortran90. A simple computational formula on the contact element method is presented based on the analysis results. The simple computational formula, the experiential formula in the code, the contact element method and the static load experiment method are respectively used to calculate single pile ultimate bearing capacity in two practical projects in order to test the simple computational formula. The results show that the simple computational formula is relatively accurate. Some advice is presented based on the analysis results.

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