Analysis of single-pile settlement in saturated soils

2006 ◽  
Vol 43 (1) ◽  
pp. 8-12 ◽  
Author(s):  
A. Zh. Zhusupbekov ◽  
A. S. Zhakulin
Keyword(s):  
Saturated Soils ◽  
Single Pile ◽  
Pile Settlement

scholarly journals Prediction of Single Pile Settlement Based on Inverse Analysis

1993 ◽  
Vol 33 (2) ◽  
pp. 126-144 ◽  
Author(s):  
Yusuke Honjo ◽  
Benny Limanhadi ◽  
Liu Wen-Tsung
Keyword(s):  
Inverse Analysis ◽  
Single Pile ◽  
Pile Settlement

scholarly journals Single Pile Settlement and Load Transfer Mechanism due to Excavation in Silty Clay

2018 ◽  
Vol 8 (1) ◽  
pp. 2485-2492 ◽  
Author(s):  
M. A. Soomro ◽  
K. F. Memon ◽  
M. A. Soomro ◽  
A. Memon ◽  
M. A. Keerio
Keyword(s):  
Load Transfer ◽  
Bending Moment ◽  
Small Strain ◽  
Transfer Mechanism ◽  
Ground Movement ◽  
Major Influence ◽  
Silty Clay ◽  
Single Pile ◽  
Load Transfer Mechanism ◽  
Pile Settlement

In densely built areas, development of underground transportation system often involves excavations for basement construction and cut-and-cover tunnels which are sometimes inevitable to be constructed adjacent to existing piled foundations. In order to gain new insights into single pile responses (i.e. settlement and load transfer mechanism) to an adjacent excavation in saturated silty clay, a three-dimensional coupled- consolidation numerical analysis is conducted in this study. An advanced hypoplasticity (clay) constitutive model with small-strain stiffness was adopted. A linear increase in pile settlement was observed due to excavation-induced stress release. This is because part of the pile is placed within the boundaries of a major influence zone due to excavation-induced ground movement. Based on a settlement criterion, apparent loss of pile‘s capacity is 14%. A maximum bending moment of about 350 kNm is induced in the pile with the maximum deflection of 28 mm. In addition, mobilisation of shear strength at the pile-soil interface was found to be a key factor governing pile-soil-excavation interaction. During excavation, a downward load-transfer mechanism in the piles can be identified.

Analysis of Single Pile Settlement in Layered Soils Based on Shear Displacement Method

2011 ◽  
Vol 368-373 ◽  
pp. 2688-2691
Author(s):  
Gui Hai Fu ◽  
Li Min Wei ◽  
Hui Zhou
Keyword(s):  
Skin Resistance ◽  
Shear Displacement ◽  
Measure Data ◽  
Single Pile ◽  
Layered Soils ◽  
Displacement Method ◽  
Shear Displacement Method ◽  
Pile Settlement ◽  
Force Displacement ◽  
Settlement Distribution

Based on the theory of shear displacement method, the transfer matrix of pile in layered soils was deduced, so the analytical theory of settlement of single pile in layered soils is established, which can take into account the nonlinear influence of soils, and with which settlement, distribution of axial force, displacement and skin resistance of single pile along the depth in layered soils can be easily attained. By contrast with the practically measure data, it can be seen that the method proposed in this paper is simply and comparatively accurate in calculating the pile settlement under working load.

scholarly journals A Parametric Study of Effect On Single Pile Integrity Due to An Adjacent Excavation Induced Stress Release in Soft Clay

2018 ◽  
Vol 8 (4) ◽  
pp. 3189-3193 ◽  
Author(s):  
D. A. Mangnejo ◽  
M. A. Soomro ◽  
N. Mangi ◽  
I. A. Halepoto ◽  
I. A. Dahri
Keyword(s):  
Soft Clay ◽  
Bending Moment ◽  
Small Strain ◽  
Single Pile ◽  
Stress Release ◽  
Pile Shaft ◽  
Induced Stress ◽  
Parametric Studies ◽  
Pile Settlement ◽  
Pile Integrity

To gain new insights into single pile responses to adjacent excavations in soft ground, numerical parametric studies are carried out. An advanced hypoplastic (clay) constitutive model which takes account of small-strain stiffness is adopted. The effects of excavation depths (i.e. formation level) relative to pile were investigated by simulating the excavation near the pile shaft (i.e., He/Lp=0.67), next to (He/Lp=1.00) and below the pile toe (He/Lp=1.33). Among the three cases, the excavation in case of He/Lp=1.33 resulted in the largest pile settlement (i.e. 7.6%dp). On the other hand, the largest pile bending moment was induced in case of He/Lp=0.67.

Numerical Simulation Analysis of the Effective Length about Single Pile

2014 ◽  
Vol 501-504 ◽  
pp. 75-78
Author(s):  
Su Zhen Cheng ◽  
Feng You Zhang ◽  
Rong Cong ◽  
Li Li Liu
Keyword(s):  
Numerical Simulation ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Effective Length ◽  
Single Pile ◽  
Efficiency Coefficient ◽  
Vertical Load ◽  
Pile Settlement ◽  
Definition Of ◽  
Pile Length

In the paper, according to the definition of the effective length and criterion of the effective length of the single pile, using the numerical method to simulate the foundation of drilling hole perfusion of single pile under vertical load pile settlement and deformation of pile body, based on the way of combining the ultimate bearing capacity and settlement control of pile top, the pile efficiency coefficient of the effective pile length is determined in certain conditions, and also the effective length of single pile. Then, the more reasonable theoretical basis is provided for engineering design and construction.

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