PHC Pile Bearing Capacity and Application

2012 ◽  
Vol 476-478 ◽  
pp. 759-762
Author(s):  
Er Wei Su
Keyword(s):  
Bearing Capacity ◽  
Tensile Properties ◽  
Pile Foundation ◽  
Foundation Design ◽  
Pipe Pile ◽  
Capacity Level ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

This essay introduces the PHC pile of vertical bearing capacity, level of capacity, capacity and final pressure values, tensile properties, pile the stress mechanism, and the factors that influence bearing capacity, then the useful suggestions of how to design and construct are given. It has vital significance to direct engineer practice, optimize static-pressed pipe-pile foundation design.

scholarly journals Influence of Karst Caves at Pile Side on the Bearing Capacity of Super-Long Pile Foundation

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Peisen Wang ◽  
Hongyan Ding ◽  
Puyang Zhang
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Horizontal Load ◽  
Karst Cave ◽  
Karst Caves ◽  
Karst Areas ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

The differences in development and situation of karst caves lead to two kinds of karst caves, and the karst cave may be on the pile side or at the pile bottom, which has a different influence on the bearing capacity of pile foundation. The paper presents a numerical analysis of the influence of karst caves at pile side on the bearing capacity of super-long pile foundation in karst areas. According to the size of pile foundation of a real bridge project, this paper modelized karst caves and investigated the karst cave from the effect of length, height, and thickness of roof on horizontal and vertical bearing capacity of pile foundation. The main conclusions can be drawn as: when the horizontal displacement at the top of pile foundation is greater than 0.05 m, the horizontal load is correlated positively with the length of karst cave; when the vertical displacement is greater than 0.07 m, the vertical load is correlated negatively with the thickness of the roof of karst cave. However, the height of karst cave has little effect on the bearing capacity; also the existence of karst cave has little influence on the dynamic response of pile foundation. The results of this study can be important with reference to the design and construction of pile foundations in karst areas.

scholarly journals Study on the Influence of Karst Size on the Vertical Bearing Capacity of Pile Foundation

2020 ◽  
Vol 780 ◽  
pp. 022005
Author(s):  
Zhongju Feng ◽  
Suizhu Guo ◽  
Jingbin He ◽  
Zhouyi Huang ◽  
Yunxiu Dong ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

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 Numerical analysis for the vertical bearing capacity of composite pile foundation system in liquefiable soil under sine wave vibration

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248502
Author(s):  
Huang Zhan-fang ◽  
Xiao-hong Bai ◽  
Chao Yin ◽  
Yong-qiang Liu
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Water Pressure ◽  
Seismic Loading ◽  
Shaking Table ◽  
Pile Spacing ◽  
Liquefiable Soil ◽  
Composite Pile ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

Composite pile foundation has been widely used in ground engineering. This composite pile foundation system has complex pile-soil interactions under seismic loading. The calculation of vertical bearing capacity of composite pile foundation is still an unsolved problem if the soil around piles is partially or completely liquefied under seismic loading. We have completed indoor shaking table model tests to measure the vertical bearing capacity in a liquefiable soil foundation under seismic loading. This paper will use a numerical approach to analyze the change of this vertical bearing capacity under seismic loading. Firstly, the Goodman contact element is improved to include the Rayleigh damping. Such an improvement can well describe the reflection and absorption of seismic waves at the interface of soil and piles. Secondly, the Biot’s dynamic consolidation theory incorporated an elastoplastic model is applied to simulate the soil deformation and the generation and accumulation of pore water pressure under seismic loading. Thirdly, after verification with our indoor shaking table test data, this approach is used to investigate the effects of pile spacing on liquefaction resistance of the composite pile foundation in liquefiable soil. The time histories of pore water pressure ratio (PPR′) are calculated for the liquefiable soil and the vertical bearing capacity in partially liquefied soil is calculated and compared with our indoor shaking table test data at the 3D, 3.5D, 4D, 5D and 6D cases (D is the pile diameter). It is found that the pile spacing has some influence on the extent of soil liquefaction between piles. The vertical bearing capacity varies with liquefaction extent of inter-pile soil. The optimization of pile spacing varies with liquefaction extent. These results may provide some reference for the design of composite pile foundation under seismic loading.

Reliability Analysis of the Vertical Bearing Capacity of Prestressed Pipe Pile Foundations

2013 ◽  
Vol 671-674 ◽  
pp. 90-93
Author(s):  
Chun Yuan Liu ◽  
Meng Xuan Zhao ◽  
Yu Liu
Keyword(s):  
Bearing Capacity ◽  
Theory Model ◽  
Load Test ◽  
Pile Foundations ◽  
Static Load Test ◽  
Pipe Pile ◽  
Software Analysis ◽  
Finite Element Software ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

The paper introduces the basic principles of vertical bearing capacity of the pile by using static load test, establish the random site theory model of the bearing capacity of prestressed pipe pile foundations calculation, calculates and statistics the try count ratio of vertical bearing capacity of 144 prestressed pipe pile in Tianjin, work out calculation procedures of JC method, calculate reliability index of vertical bearing capacity and analyze calculation results. In the last, we build a model using the finite element software, analysis the displacement of pile top under earthquake, evaluates the horizontal bearing capacity of prestressed pipe pile.

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