Comprehensive effect coefficients calculating method for lateral bearing capacity of pile groups

The ultimate bearing capacity of rigid vertical and batter piles and pile groups in clay has been determined under various inclinations of the load, varying from the vertical to horizontal directions. The results of load tests on single model piles of different lengths and inclinations and on free-standing groups and piled foundations are compared with theoretical estimates. The influence of load inclination on the bearing capacity can be represented by simple interaction relationships between the axial and normal components of the ultimate load. The effect of eccentricity of the load on the ultimate bearing capacity of pile groups is discussed on the basis of previous theory and model test results.

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Some Recent Research on the Bearing Capacity of Foundations

Canadian Geotechnical Journal ◽

10.1139/t63-003 ◽

1963 ◽

Vol 1 (1) ◽

pp. 16-26 ◽

Cited By ~ 506

Author(s):

George Geoffrey Meyerhof

Keyword(s):

Bearing Capacity ◽

Model Tests ◽

Vertical Load ◽

Pile Groups ◽

Free Standing ◽

Flexible Foundations ◽

Inclined Loads ◽

Single Piles ◽

Piled Foundations

The first part of the paper summarizes the results of recent research on the bearing capacity of spread foundations of various shapes under a central vertical load and outlines the effects of foundation depth, eccentricity and inclination of the load. Simple formulae have been derived for use in practice and their application to the design of rigid and flexible foundations is briefly indicated.The second part of the paper discusses the bearing capacity of single piles under vertical and inclined loads. The bearing capacity of piled foundations and free-standing pile groups is outlined, and the results of model tests on pile groups under central and eccentric loads are briefly analysed in relation to some problems in practice.

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Assessing the Effects of Length, Slope and Distance between Piles on the Bearing Capacity of a Pile Group under Axial Loading in Granular Soil

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.1352 ◽

2017 ◽

Vol 7 (5) ◽

pp. 1894-1899

Author(s):

A. Firoozfar ◽

A. Rostami ◽

H. Ghaderi ◽

H. Zamani ◽

A. Rostamkhani

Keyword(s):

Bearing Capacity ◽

Axial Loading ◽

Pile Group ◽

Granular Soils ◽

Deep Foundations ◽

Pile Groups ◽

Finite Element Software ◽

Bedrock Depth ◽

Exact Effect ◽

Technical Capacity

Piles are usually made of steel, concrete, reinforced concrete or wood, used to enhance the ground’s bearing capacity in order to enable the construction of deep foundations, also called pile foundations. However, the exact effect of the complex interaction between the piles and the surrounding soil has not adequately been investigated yet. Considering the increased application of the technique recently, further analysis is essential for achieving the highest economic and technical capacity. Using fewer piles or shorter piles and allowing greater distances between pile groups, results to reduced construction. However, other restrictions such as high groundwater level, bedrock depth and the limited size of the foundation are also to be considered. The issue of optimal pile layout is further investigated in the current paper employing Plaxis, a finite element software, for modeling purposes and considering axial loadings in granular soils. Results are shown and further discussed.

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Model Test Study on Bearing Capacity of Nonuniformly Arranged Pile Groups

International Journal of Geomechanics ◽

10.1061/(asce)gm.1943-5622.0002181 ◽

2021 ◽

Vol 21 (10) ◽

pp. 04021200

Author(s):

Shan-wei Liu ◽

Qian-qing Zhang ◽

Ruo-feng Feng

Keyword(s):

Bearing Capacity ◽

Model Test ◽

Pile Groups ◽

Test Study

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Ultimate capacity of flexible piles under eccentric and inclined loads

Canadian Geotechnical Journal ◽

10.1139/t89-004 ◽

1989 ◽

Vol 26 (1) ◽

pp. 34-42 ◽

Cited By ~ 11

Author(s):

G. G. Meyerhof ◽

D. P. Ghosh

Keyword(s):

Bearing Capacity ◽

Soft Clay ◽

Ultimate Bearing Capacity ◽

Embedment Depth ◽

Pile Groups ◽

Single Model ◽

Eccentric Load ◽

Inclined Loads ◽

Load Tests ◽

Ultimate Moment

The ultimate bearing capacity of flexible single model piles and small pile groups of timber and nylon in loose sand and soft clay has been determined under various combinations of eccentricity and inclination of the load varying in direction from vertical to horizontal. The results of the load tests are presented in the form of polar bearing capacity diagrams and they are compared with the theoretical estimates based on the concept of an effective embedment depth in terms of the behaviour of equivalent rigid piles. Reasonable agreement has been found between the observed and predicted ultimate bearing capacity of flexible piles under any combination of eccentricity and inclination of loads. Key words: flexible piles, pile groups, ultimate bearing capacity, ultimate moment, model test, eccentric load, inclined load, sand, clay.

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