Bearing capacity of flexible batter piles under eccentric and inclined, loads in layered soil

1994 ◽  
Vol 31 (4) ◽  
pp. 583-590 ◽  
Author(s):  
G.G. Meyerhof ◽  
A.S. Yalcin
Keyword(s):  
Bearing Capacity ◽  
Model Test ◽  
Layered Structure ◽  
Layered Soil ◽  
Head Model ◽  
Test Results ◽  
Inclined Load ◽  
Eccentric Load ◽  
Inclined Loads ◽  
Batter Piles

The behaviour of single free-head model flexible vertical and batter piles under the general case of eccentric and inclined loads in two-layered soil is investigated. The bearing capacity of the piles is found to depend on the layered structure, the eccentricity and inclination of the load, and the pile batter. The theoretical estimates of ultimate loads obtained from semiempirical relations agree fairly well with the test results. Key words : bearing capacity, deformation, batter pile, eccentricity factor, eccentric load, inclination factor, inclined load, layered soil, model test, sand, clay.

Behaviour of flexible batter piles under inclined loads in layered soil

1993 ◽  
Vol 30 (2) ◽  
pp. 247-256 ◽  
Author(s):  
G. G. Meyerhof ◽  
A. S. Yalcin
Keyword(s):  
Bearing Capacity ◽  
Reasonable Agreement ◽  
Influence Factors ◽  
Layered Soil ◽  
Head Model ◽  
Embedment Depth ◽  
Test Results ◽  
Inclined Loads ◽  
Vertical Displacements ◽  
Batter Piles

The behaviour of single free-head model flexible vertical and batter piles under central inclined loads in two-layered soil is investigated. The bearing capacity of the piles is found to depend on the layered structure, load inclination, and pile batter. The theoretical estimates obtained from semiempirical relations agree well with the test results. Previous displacement equations for flexible batter piles in elastic isotropic soil are modified for piles in anisotropic layered soil using an effective embedment depth of equivalent rigid piles. Practical equations for horizontal and vertical displacements of flexible batter piles are presented on the basis of resultant influence factors that are related to the batter angle, load inclination, and distribution of soil modulus with depth. The observed horizontal and vertical displacements of the piles are in reasonable agreement with the theoretical estimates, which are also supported by the results of some field cases. Key words : bearing capacity, deformation, batter pile, inclination factor, inclined load, layered soil, model test, sand, clay.

The Bearing Capacity of Rigid Piles Under Inclined Loads in Sand. II: Batter Piles

1973 ◽  
Vol 10 (1) ◽  
pp. 71-85 ◽  
Author(s):  
G. G. Meyerhof ◽  
Gopal Ranjan
Keyword(s):  
Bearing Capacity ◽  
Previous Investigation ◽  
Test Results ◽  
Inclined Load ◽  
Inclined Loads ◽  
Loading Tests ◽  
Batter Piles ◽  
Laterally Loaded ◽  
Ultimate Resistance ◽  
Good Agreement

Following the previous investigation reported in the first part on vertical piles, this second part of the paper presents an analysis of the results of loading tests on rigid batter piles under inclined load in sand. The bearing capacity of axially loaded batter piles is discussed by comparing experimental results and theoretical estimates. The theory for ultimate resistance of rigid vertical piles under horizontal loads is extended to that of laterally loaded batter piles. Model test results are compared with those of theoretical estimates and good agreement is found. Methods of analysis of vertical piles under inclined loads are extended to those of rigid batter piles under inclined loads in sand and the analysis is compared with some test results.

The bearing capacity of rigid piles and pile groups under inclined loads in clay

1981 ◽  
Vol 18 (2) ◽  
pp. 297-300 ◽  
Author(s):  
G. G. Meyerhof
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Test Results ◽  
Pile Groups ◽  
Free Standing ◽  
Previous Theory ◽  
Inclined Loads ◽  
Load Tests ◽  
Batter Piles ◽  
Piled Foundations

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.

Bearing capacity of flexible piles under eccentric and inclined loads in layered soil

1991 ◽  
Vol 28 (6) ◽  
pp. 909-917 ◽  
Author(s):  
A. S. Yalcin ◽  
G. G. Meyerhof
Keyword(s):  
Bearing Capacity ◽  
Pile Group ◽  
Layered Soil ◽  
Pile Groups ◽  
Eccentric Load ◽  
Pile Capacity ◽  
Model Pile ◽  
Inclined Loads ◽  
Experimental Values ◽  
Flexible Model

The bearing capacity of flexible model piles and small pile groups under axial, lateral, and various combinations of eccentric and inclined loads in layered soil consisting of clay overlying sand is investigated. Ultimate pile capacity is found to depend on the eccentricity and inclination of the load and, more significantly, on the ratio of the upper layer thickness to pile embedment. Theoretical estimates based on the concept of effective pile embedment ratio and expressed in terms of equivalent rigid piles agree reasonably well with the experimental values. The behaviour of 2 × 2 flexible model pile groups is observed to be similar to that of single piles. Key words: bearing capacity, piles, flexible pile, pile group, layered soil, sand, clay, eccentric load, inclined load, model pile test.

The bearing capacity of rigid piles and pile groups under inclined loads in layered sand

1981 ◽  
Vol 18 (4) ◽  
pp. 514-519 ◽  
Author(s):  
G. G. Meyerhof ◽  
S. K. Mathur ◽  
A. J. Valsangkar
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Test Results ◽  
Pile Groups ◽  
Free Standing ◽  
Previous Theory ◽  
Inclined Loads ◽  
Load Tests ◽  
Batter Piles ◽  
Theory And Model

The ultimate bearing capacity of rigid vertical and batter piles and pile groups in layered sand 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 inclinations and on free-standing groups 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.

Ultimate bearing capacity of shallow foundations on sand with geogrid reinforcement

1993 ◽  
Vol 30 (3) ◽  
pp. 545-549 ◽  
Author(s):  
M.T. Omar ◽  
B.M. Das ◽  
V.K. Puri ◽  
S.C. Yen
Keyword(s):  
Bearing Capacity ◽  
Key Words ◽  
Model Test ◽  
Ultimate Bearing Capacity ◽  
Shallow Foundations ◽  
Shallow Foundation ◽  
Laboratory Model ◽  
Critical Depth ◽  
Test Results ◽  
Laboratory Model Test

Laboratory model test results for the ultimate bearing capacity of strip and square foundations supported by sand reinforced with geogrid layers have been presented. Based on the model test results, the critical depth of reinforcement and the dimensions of the geogrid layers for mobilizing the maximum bearing-capacity ratio have been determined and compared. Key words : bearing capacity, geogrid, model test, reinforced sand, shallow foundation.

Stabilization of Weak Clay with Strong Sand and Geogrid at Sand-Clay Interface

1998 ◽  
Vol 1611 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Braja M. Das ◽  
Kim H. Khing ◽  
Eun C. Shin
Keyword(s):  
Bearing Capacity ◽  
Model Test ◽  
Soil Layer ◽  
Granular Soil ◽  
Laboratory Model ◽  
Test Results ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Base Course ◽  
Granular Base

The load-bearing capacity of a weak clay subgrade can be increased by placing a strong granular base course of limited thickness on top of the clay layer. The load-bearing capacity can be increased further, or the thickness of the granular base course can be reduced, by separating both layers by a geogrid. Laboratory model test results for the ultimate bearing capacity of a rigid strip loading on the surface of a granular soil underlain by a soft clay with a layer of geogrid at the interface of the two soils are presented. The optimum thickness of the granular soil layer and the critical width of the geogrid layer required to derive the maximum benefit from the reinforcement were determined. Model test results on the permanent settlement of the rigid strip load caused by cyclic loading of low frequency are presented.

Model Test Studies of the Vertical Bearing Behavior of Bored Piles with Breakage Defects

2012 ◽  
Vol 256-259 ◽  
pp. 65-70
Author(s):  
Cheng Hua Wang ◽  
Juan Su ◽  
Gan Wang
Keyword(s):  
Bearing Capacity ◽  
Model Test ◽  
Great Influence ◽  
Test Results ◽  
Sudden Drop ◽  
Bored Piles ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity ◽  
Bearing Behavior

In order to study the vertical bearing behavior of bored piles with breakage defects, a series of methods for simulation of normal piles and broken piles in laboratory was developed and used to investigate the vertical bearing behavior of these piles. The load-settlement curves of normal piles and broken piles were measured and analyzed. The tests revealed that the upper part of a broken pile works alone as a short pile before it contact with the lower part of the pile at the end of the first sudden drop stage.The analysis of the test results showed that the position of the breakage defect has a great influence on the lost in vertical bearing capacity of the pile.

Full-displacement pressuremeter method for rigid piles under lateral loads and moments

1987 ◽  
Vol 24 (4) ◽  
pp. 471-478 ◽  
Author(s):  
G. G. Meyerhof ◽  
V. V. R. N. Sastry
Keyword(s):  
Model Test ◽  
Reasonable Agreement ◽  
Lateral Pressure ◽  
Layered Soil ◽  
Horizontal Load ◽  
Ultimate Capacity ◽  
Lateral Loads ◽  
Inclined Loads ◽  
Pure Moment ◽  
Rigid Model

The results of full-displacement pressuremeter tests in beds of sand, clay, and layered soil have been used to estimate the lateral soil pressures, ultimate capacity, and displacements of instrumented rigid model piles under eccentric and inclined loads. Comparisons of these estimates with observations on the piles under horizontal load and pure moment have been made and reasonable agreement is found. The analyses are also compared with some field case records. Key words: bearing capacity, clay, displacements, horizontal load, lateral pressure, layered soil, model test, moment, pile, pressuremeter, sand.

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