scholarly journals NUMERICAL ANALYSIS OF STEEL ENCASED PRECAST CONCRETE PILES UNDER ULTIMATE CONDITION

2021 ◽  
Vol 86 (779) ◽  
pp. 117-126
Author(s):  
Taku OBARA ◽  
Susumu KONO ◽  
Yoichi ASAI ◽  
Yoshinobu KIYA ◽  
Mitsumaru GOAN
Keyword(s):  
Numerical Analysis ◽  
Precast Concrete ◽  
Concrete Piles ◽  
Ultimate Condition

scholarly journals Limitations of the Danish driving formula for short piles

2021 ◽  
Vol 44 (2) ◽  
pp. 1-6
Author(s):  
Silvio Heleno de Abreu Vieira ◽  
Francisco R. Lopes
Keyword(s):  
Load Capacity ◽  
Precast Concrete ◽  
Free Fall ◽  
Technical Note ◽  
Driven Piles ◽  
Concrete Piles ◽  
Load Tests ◽  
Semi Empirical ◽  
The City ◽  
Pile Length

Dynamic formulae are a widely used expedient for the control of driven piles to ensure load capacity. These formulae have considerable limitations when used in the prediction of the load capacity on their own, but are very useful in the control of a piling when combined with other tests. This technical note presents an evaluation of the Danish Formula for 54 precast concrete piles, comparing its results with High Strain Dynamic Tests (HSDTs), Static Load Tests (SLTs) and predictions by a semi-empirical static method (Aoki & Velloso, 1975). The data used in the comparison come from three works in the city of Rio de Janeiro, Brazil. All piles were driven with free-fall hammers and in one particular work the piles were relatively short. The predictions of the Danish Formula were evaluated in relation to the pile length/diameter ratio. It was concluded that for short piles - with lengths less than 30 times the diameter - this formula indicates bearing capacities higher than the actual ones. A correction for a safe use of the Danish Formula for short piles is suggested.

scholarly journals The Existing State of Precast Concrete Piles

1995 ◽  
Vol 33 (8) ◽  
pp. 16-25
Author(s):  
K. Oiwa ◽  
K. Tomiyama ◽  
I. Yanashima
Keyword(s):  
Precast Concrete ◽  
Concrete Piles

Efficient driving of precast concrete piles

2021 ◽  
pp. 477-488
Author(s):  
A.F. van Weele ◽  
A.J.G. Schellingerhout
Keyword(s):  
Precast Concrete ◽  
Concrete Piles

scholarly journals Numerical analysis of pile foundations in seasonally freezing soil ground

2021 ◽  
Vol 135 (2) ◽  
pp. 37-48
Author(s):  
G. Tleulenova ◽  
◽  
A. Zhussupbekov ◽  
Zh. Shakhmov ◽  
A. Omarov ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Caspian Sea ◽  
Pile Foundation ◽  
Precast Concrete ◽  
Interaction Mechanism ◽  
Pile Foundations ◽  
The Caspian Sea ◽  
Static Tests ◽  
Freezing Soil ◽  
Composite Joint

The article presents the results of numerical analysis for pile foundation in seasonally freezing soil ground. This project uses the static tests of soil by piles at the construction site of Cargo off-loading facilities (Prorva, Atyrau region, Kazakhstan). The project area is located along the east coast of the Caspian Sea, both onshore and offshore, near the Prorva oilfield, Kazakhstan. At present, the North Caspian Sea has a limited water depth (max 8 m). According to the test results have been made design changes in the pile foundation. Static tests (SCLT) were carried out on the piles with 16m in length and precast concrete joint pile foundations with a total length of 22m to 27m. This research is important for an understanding of the interaction mechanism of precast composite joint piles with seasonally freezing soil ground of the Caspian Sea coastal area of the site.

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