scholarly journals OPTIMIZATION OF THE PILE LENGTH ON THE BASIS OF PILE SKIN BEARING CAPACITY MEASUREMENTS

2018 ◽  
Author(s):  
ANDREJ ŠTRUKELJ ◽  
BORUT MACUH
Keyword(s):  
Bearing Capacity ◽  
Pile Length

scholarly journals REVIEW OF BEARING CAPACITY AND SETTLEMENT OF PILE FOUNDATION IN PORT INFRASTRUCTURE

Pondasi ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 1
Author(s):  
Adi Sunarno ◽  
Rinda Karlinasari ◽  
Abdul Rochim
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Pile Group ◽  
Standard Penetration Test ◽  
Infrastructure Development ◽  
Lateral Deflection ◽  
Economic Progress ◽  
Port Infrastructure ◽  
Pile Length ◽  
Group Pile

ABSTRACTThe rapid infrastructure development is one of the indicators on the country economic progress. Indonesia as one of the largest archipelagic countries in the world, should be prioritized the port infrastructure to support the maritime. One of the government’s solutions is infrastructure development of Kuala Tanjung port. This research analyzed bearing capacity and settlement of single and group pile foundation on port infrastructure of Kuala Tanjung so it is known that the port is safe to use. The data used are Standard Penetration Test data with soil stratigraphy that is clay and sand. The type of foundation used is Concrete Spun Pile 1000 mm and 600 mm with a pile length of 36 meters. The data are then analyzed by manual calculation and Allpile 6.5E program based on Reese method and methods such as Vesic and Converse-Labarre. The results showed that single pile foundations of 1000 mm and 600 mm each had allowable capacity (Qall) 492.78-538.81 ton and 110.65-128.31 ton, with vertical load (Q) of 330.90 ton, settlement 0.56-1.17 cm and 3.32-3.64 cm, lateral deflection 27.50 cm and 94.90 cm. While the 1000 mm and 600 mm pile group foundations respectively have Qall 8717.31-10796.29 tons and 2059.25-2566.32 tons, with Q of 6618 tons, settlement 0.56-1.68 cm and 3.32-3.64 cm, lateral deflection of 2.49 cm and 19.49 cm. The conclusion of the research indicates that the safe pile foundation used is 1000 mm group pile foundation. Keywords: Bearing Capacity; Foundations; Pile Foundation; Port Infrastructure; Settlement

Numerical Simulation of Squeezed Branch and Plate Pile Subjected to Vertical and Lateral Loads

2014 ◽  
Vol 926-930 ◽  
pp. 597-600
Author(s):  
Xiao Juan Gao ◽  
Yue Hui Li
Keyword(s):  
Numerical Simulation ◽  
Elastic Modulus ◽  
Bearing Capacity ◽  
Lateral Load ◽  
Vertical Load ◽  
Lateral Loads ◽  
Load Bearing Capacity ◽  
The Mean ◽  
Bearing Behavior ◽  
Pile Length

Based on the theoretical analysis results, the bearing behavior of squeezed and branch pile under vertical load and lateral load was analyzed in this paper. The mean works include the influence of vertical load on the pile lateral bearing capacity and influence of the lateral load on the vertical load bearing capacity. The factors influence the bearing capacity of pile such as elastic modulus of soil around and under pile bottom, pile length, plate position are also analyzed.

scholarly journals Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Tianzhong Ma ◽  
Yanpeng Zhu ◽  
Xiaohui Yang ◽  
Yongqiang Ling
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Horizontal Displacement ◽  
Pile Group ◽  
Lateral Load ◽  
Test Model ◽  
Pile Head ◽  
Load Bearing ◽  
Composite Pile ◽  
Pile Length

It is very necessary to research the bearing characteristics of composite pile group foundations with long and short piles under lateral load in loess areas, because these foundations are used widely. But few people researched this problem in loess areas up to now worldwide. In this paper, firstly, an indoor test model of a composite pile foundation with long and short piles is designed and then employed to explore the vertical load bearing characteristics and load transfer mechanisms of a single pile, a four-pile group, and a nine-pile group under different lateral loads. Secondly, ANSYS software is employed to analyze the load-bearing characteristics of the test model, and for comparison with the experimental results. The results demonstrate the following. (1) The lateral force versus pile head displacement curves of the pile foundation exhibit an obvious steep drop in section, which is a typical feature of piercing damage. A horizontal displacement limit of the pile foundation is 10 mm and 6mm for the ones sensitive to horizontal displacement. (2) The axial force along a pile and frictional resistance do not coincide, due to significant variations and discontinuities in the collapsibility of loess; a pile body exhibits multiple neutral points. Therefore, composite pile groups including both long and short piles could potentially maximize the bearing capacity and reduce pile settlement. (3) The distribution of stress and strain along the pile length is mainly concentrated from the pile head to a depth of about 1/3 of the pile length. If the lateral load is too large, short piles undergo rotation about their longitudinal axis and long piles undergo flexural deformation. Therefore, the lateral bearing capacity mainly relies on the strength of the soil at the interface with the pile or the horizontal displacement of the pile head.

Geometry Optimization and Engineering Applications of Transmission Tower Foundation in the Slope

2013 ◽  
Vol 423-426 ◽  
pp. 1243-1247
Author(s):  
Bin Peng ◽  
Xing Yun Wang ◽  
Yu Wang ◽  
He Huang
Keyword(s):  
Regression Analysis ◽  
Bearing Capacity ◽  
Geometry Optimization ◽  
Ultimate Bearing Capacity ◽  
Nonlinear Regression Analysis ◽  
Transmission Tower ◽  
Engineering Applications ◽  
Practical Engineering ◽  
Tower Foundation ◽  
Pile Length

Combining with practical engineering, geometry optimization and engineering applications of transmission tower foundation in the slope is researched by using the finite-difference software FLAC3D. The variation of the pullout, vertical and horizontal ultimate bearing capacity with the diameter and length of the pile is analyzed. And optimization program of actual project is given. Research shows that when the pile length is constant, the variation of the pullout and vertical ultimate bearing capacity is increasing with the diameter increasing significantly and the horizontal ultimate bearing capacity is not significant. When the diameter is constant, the pullout, vertical and horizontal ultimate bearing capacity is increasing with the length increasing significantly. By analyzing nonlinear regression analysis of calculation data, the formula of the ultimate bearing capacity is carried out, which can consider the different pile diameters and lengths. When the gradient and distance of slopes is constant, the pullout, vertical and horizontal ultimate bearing capacity can be carried out with the formula, which can provide a reference to specification revision and engineering.

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 Behavior of Defective Cast in Place Piles

2021 ◽  
Vol 27 (4) ◽  
pp. 96-117
Author(s):  
A'amal A. Al-Saidi ◽  
Mosa J. Al-Mosawe ◽  
Yousef Al-Shakarchi Al-Shakarchi
Keyword(s):  
Bearing Capacity ◽  
Experimental Work ◽  
Critical Case ◽  
Defect Type ◽  
Floating Pile ◽  
Model Pile ◽  
Two Parameters ◽  
Type Of Failure ◽  
Pile Length ◽  
End Bearing Pile

This paper deals with testing defected model piles in the soil in order to study their behavior. In this respect, the results of model pile tests are discussed either geotechnically or structurally according to the type of failure.   Two parameters were studied in order to evaluate the general behavior of defective piles. These parameters include the defect location and the defect type for floating and end bearing pile. The results of the experimental work indicated that the critical case for floating pile is seen to be when the defect of (5%) at the first third of the pile length at which the decrease in the bearing capacity is about (21%), while the decrease in the bearing capacity is found to be (14%) and (10%), when the defect is at the middle and the lower third of the pile length, respectively. The decrease in the bearing capacity for floating pile is found to be (31%) and (21%) for void and neck defect, respectively, while the decrease in the bearing capacity for end bearing pile is found to be (43%) and (52%) for void and neck defect, respectively.

scholarly journals Research on the Design of Miniature Pile Foundation for Transmission Line

2019 ◽  
Vol 136 ◽  
pp. 02022
Author(s):  
Xinmin Yu ◽  
Xianri Wang
Keyword(s):  
Transmission Line ◽  
Bearing Capacity ◽  
Pile Foundation ◽  
Small Diameter ◽  
Diameter Ratio ◽  
Pile Diameter ◽  
Working Surface ◽  
Bored Piles ◽  
Pile Length ◽  
Small Working

Micro-pile is a kind of small diameter bored piles, also known as root pile, pile diameter is generally 150-400mm, length-diameter ratio is generally greater than 30,and pile length is usually not more than 30m. Compared with ordinary pile, micro-pile has the advantages of fast construction speed, small working surface, high bearing capacity and small settlement.

Field Test of DX Pile Group

2011 ◽  
Vol 243-249 ◽  
pp. 2451-2455
Author(s):  
Song Tao Tang ◽  
Li Hong Chen
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Pile Group ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Test Results ◽  
The Mean ◽  
Engineering Practices ◽  
Pile Length

DX pile is a newly developed variable cross-section pile. Compared to conventional straight pile, it has distinct advantages on bearing capacity and settlement control. However, the bearing mechanism and characteristics of settlement, especially on group DX piles, are not clear. This paper illustrated and analyzed the bearing capacity and settlement characteristics of single DX pile and group DX piles according to the test results of in-situ model test. Special attention was paid on single and group DX pile comparison under same circumstances, at the mean while, compared the single DX pile and conventional pile with the same pile length and diameter, and with the same bearing capacity. The conclusions from the test results provided theoretical references for the design of the DX piles in engineering practices.

Discussion on Effect Factors and Formula of Bearing Capacity of Reinforced Mixing Pile

2012 ◽  
Vol 594-597 ◽  
pp. 708-712
Author(s):  
Gui Lin Sheng ◽  
Ya Ge Zhang
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Interaction Mechanism ◽  
Single Pile ◽  
Calculation Formula ◽  
Effect Factors ◽  
Capacity Calculation ◽  
Pile Length

Based on the reinforced mixing pile soil interaction mechanism, the effect of the reinforced mixing pile bearing capacity factors are analyzed; and on the basis of experiment and theoretical analysis the results of reinforced mixing pile with core rate optimal optimum core pile length and ratio; in the analysis of experimental data based on the present, on single pile the bearing capacity calculation formula and puts forward some suggestions.

Bearing capacity of piles in layered soils. Part 1. Clay overlying sand

1978 ◽  
Vol 15 (2) ◽  
pp. 171-182 ◽  
Author(s):  
G. G. Meyerhof ◽  
V. V. R. N. Sastry
Keyword(s):  
Bearing Capacity ◽  
Scale Effects ◽  
Cone Penetrometer ◽  
Test Results ◽  
Layered Soils ◽  
Driven Piles ◽  
Small Model ◽  
Sand Stratum ◽  
Pile Length ◽  
Shaft Friction

The paper summarizes investigations on jacked and driven piles in non-uniform soils consisting of clay and sand. Part 1 deals with the bearing capacity of piles penetrating through clay into sand whereas Part 2 discusses the case of piles in a sand stratum overlying clay. Preliminary tests on small model piles have been undertaken to study the effects on the point resistance of parameters such as the strength and thickness of a clay stratum, the strength ratio of soils in the two layers and the geometry of the layers. Based on these results, tests on a 76 mm diameter instrumented steel pile and a 36 mm diameter static cone penetrometer have been carried out for selected combinations of the variables involved.The test results are analysed to determine the influence of clay thickness and strength on the point resistance of piles in sand, expressed by a non-dimensional clay strength factor λ, and parameters influencing λ are discussed. The effect of layering on the shaft friction in sand and the radial stresses along the pile length are studied. The efficiency of small groups of model piles in layered soils is obtained. Field data are analysed, including scale effects, and simple design rules are suggested to estimate the bearing capacity of piles in layered soils.

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