scholarly journals VERTICAL BEARING CAPACITY OF SANDY GROUND REINFORCED WITH EXPANSION STEEL PIPE PILE

2021 ◽  
Vol 86 (779) ◽  
pp. 89-96
Author(s):  
Nobuyuki KUROYANAGI ◽  
Atsushi ITO ◽  
Masahiro YAMAZAKI
Keyword(s):  
Bearing Capacity ◽  
Steel Pipe ◽  
Pipe Pile ◽  
Sandy Ground ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity ◽  
Steel Pipe Pile

Reliability Analysis of Pile Vertical Bearing Capacity

2011 ◽  
Vol 243-249 ◽  
pp. 5669-5673
Author(s):  
Shu Wen Cao ◽  
Dong Zhao ◽  
Jun Qing Liu
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Bearing Capacity ◽  
Reliability Analysis ◽  
Steel Pipe ◽  
Pipe Pile ◽  
Artificial Neural ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity ◽  
Steel Pipe Pile

To provide guidance to engineering practice, the reliability of the vertical bearing capacity of single steel pipe pile is analyzed. The FOSM method, the FOSM method based on fuzzy stochastic and the FOSM method based on artificial neural network are used to calculate the reliability of steel pipe pile through MATLAB program. It is show that the FOSM method based on fuzzy stochastic and the FOSM method based on artificial neural network are more suitable for the reliability analysis.

scholarly journals Research on Uplift Bearing Performance of Assembled Steel Pipe Pile used in Transmission Lines in Mountainous Terrain

2019 ◽  
Vol 275 ◽  
pp. 03008
Author(s):  
Kun Zhou ◽  
Linhua Chen ◽  
Xiangyu Gu ◽  
Qi Zhang
Keyword(s):  
Bearing Capacity ◽  
Transmission Lines ◽  
Frictional Resistance ◽  
Steel Pipe ◽  
Mountainous Terrain ◽  
Pipe Pile ◽  
Fbg Sensors ◽  
Strength And Stiffness ◽  
Steel Pipe Pile ◽  
Lateral Friction

Assembled steel pipe pile, which is a novel pile foundation, is developed in the paper. The ultimate uplift bearing capacity of the pile is proposed, and simulation by Plaxis3D and the corresponding experiment are performed to verify the theory. In the simulation, ultimate uplift bearing capacity of the assembled steel pipe pile and ultimate lateral frictional resistance of the interface of pile-soil increases with the increasing of the strength and stiffness of the interface of pile-soil, and with the increasing of length-diameter ratio, ultimate uplift bearing capacity of the assembled steel pipe pile increases while the ultimate lateral frictional resistance decreases gradually. The ultimate lateral friction is influenced by both of the strength of the soil around the pile and the interface of pile-soil, and the ultimate uplift bearing capacity obtained by simulation and theoretical calculation are close. Long-gauge FBG sensors are used in the experiment for measuring the longitudinal strain of the pile, and the error of ultimate uplift bearing capacity between the results of experiment and theory is less than 10%.

Intelligent Prediction for Side Friction of Large-Diameter and Super-Long Steel Pipe Pile Based on Support Vector Machine

2012 ◽  
Vol 170-173 ◽  
pp. 747-750 ◽  
Author(s):  
Ming Yuan Zhang ◽  
Li Liang ◽  
Hua Zhu Song ◽  
Yan Li ◽  
Wen Tao Peng
Keyword(s):  
Bearing Capacity ◽  
Large Diameter ◽  
Steel Pipe ◽  
Support Vector ◽  
Engineering Project ◽  
Pipe Pile ◽  
Vector Machines ◽  
Load Tests ◽  
Side Friction ◽  
Steel Pipe Pile

In recent years, more and more large-diameter and super-long steel pipe piles are applied in engineering project. But people just know little about the bearing characteristics of super-long piles as it is very difficult to study such type of super-long piles in the laboratory and the accumulated test data of super-long piles in actual projects is very few restricted by test conditions and test cost. In engineering work, design value of bearing capacity of large-diameter and super-long piles is still referred to the calculation theory of ordinary pile that cannot take into account engineering security and economic simultaneously. In this paper, SVM-Q which is an intelligent algorithm based on Support Vector Machines is developed for predicting side friction of large-diameter and super-long steel pipe pile. Result shows that the side friction of longer large-diameter and super-long steel pipe piles with similar bearing characteristics can be effectively predicted by the SVM-Q algorithm after fully learning enough side friction data samples of the limited testing piles with gradually larger length, and boundary length of super-long steel pipe pile in this actual engineering could be qualitatively judged by comparing predictive data with the measured data. This method is very meaningful for initiative predicting the bearing capacity of large-diameter and super-long steel pipe piles in the case that there is no suitable calculation method. The predictive bearing capacity also can be adopted to verify the bearing capacity of large-diameter and super-long steel pipe piles that donot be field-tested by static load tests in actual projects.

Numerical Analysis of Compacted Forming Concrete Pile in the Subsea Soil

2011 ◽  
Vol 317-319 ◽  
pp. 2258-2265
Author(s):  
Jian Min Chen ◽  
Xiao Dong Hao ◽  
Zu Chang Song
Keyword(s):  
Elastic Modulus ◽  
Numerical Analysis ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Feature Point ◽  
Steel Pipe ◽  
Pipe Pile ◽  
Concrete Pile ◽  
Steel Pipe Pile

Based on the present tecnology of pile, a method of compacted forming concrete pile applied in the subsea base is studied. Using the method of finite different the procedure of compacted forming at the end of steel pipe pile has been simulated in the particular geology soil, the effects of the elastic modulus, cohesion, friction and dilation on the compacted behaviour are aquired and the bearing capacity has been calculated. The results show that the ultimate bearing capacity of this pile increases approximate 3 times bigger than the steel pipe pile with the same dimentions, in addition, its curve of Q-S is smooth and ultimate feature point is indistinct, which proves that this tecnology of compacted forming concrete pile is able to increase the bearing capacity prominently.

Effect of Soil Stiffness on Bearing Characteristics of Large-Diameter and Super-Long Steel Pipe Pile Based on FLAC3D

2012 ◽  
Vol 170-173 ◽  
pp. 743-746 ◽  
Author(s):  
Ming Yuan Zhang ◽  
Hong Yuan Gao ◽  
Yan Li ◽  
Hua Zhu Song ◽  
Wen Tao Peng
Keyword(s):  
Large Diameter ◽  
Three Dimensional ◽  
Steel Pipe ◽  
Soil Stiffness ◽  
Pipe Pile ◽  
Friction Resistance ◽  
Vertical Bearing ◽  
Side Friction ◽  
Port Engineering ◽  
Steel Pipe Pile

In recent years, more and more large-diameter and super-long steel pipe piles are widely used in bridge and port engineering. But so far, people know very little about their bearing characteristics and there is no suitable calculation method of their bearing capacity in the design specifications. In engineering design, computational theory of ordinary piles is referenced. We all know that carrying capacity of large-diameter and super-long steel pipe piles is very closely related to the surrounding soil stiffness, but we do not know how they influence each other. In the paper, the effect of soil stiffness on vertical bearing and settlement features are studied for large-diameter and super-long steel pipe pile based on the three-dimensional continuum medium fast lagrangian method (FLAC3D). The result shows that the settlement of pile top will be reduced and side friction resistance of large-diameter and super-long steel pipe pile can be increased effectively if the stiffness of soil around the piles become stronger under the unchanged load. But when the stiffness of soil exceeds a certain intensity, the rate of pile top settlement reducing decreases gradually. In other words, when the soil stiffness increases to a certain extent, continue to increase the stiffness of soil around piles can not effectively reduce the settlement of pile top. It is obvious that the stiffness of soil around pile has a direct impact on the pile settlement characteristics and bearing characteristics. The conclusion is of significance for the reasonable design of large-diameter and super-long steel pipe pile foundation in engineering applications.

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