A new modified approach to evaluating the installation power of large-diameter helical piles in sand validated by centrifuge and field data

2021 ◽  
Vol 114 ◽  
pp. 102756
Author(s):  
Kang Shao ◽  
Qian Su ◽  
Kaiwen Liu ◽  
Guoxia Shao ◽  
Zhibin Zhong ◽  
...  
Keyword(s):  
Field Data ◽  
Large Diameter ◽  
Helical Piles

scholarly journals Large-diameter helical pile capacity – torque correlations

2017 ◽  
Vol 54 (7) ◽  
pp. 968-986 ◽  
Author(s):  
Jared Harnish ◽  
M. Hesham El Naggar
Keyword(s):  
Large Diameter ◽  
Failure Criteria ◽  
Load Test ◽  
Ultimate Capacity ◽  
Pile Capacity ◽  
Shearing Resistance ◽  
Helical Piles ◽  
Torque Capacity ◽  
Load Tests ◽  
Pile Load Tests

Large-diameter helical piles are utilized increasingly to support heavy structures. Both the magnitude of the required installation torque and the pile capacity can be directly attributed to the soil shearing resistance developed over the embedded area of the pile including the shaft and helical plates. Hence, the pile capacity can be correlated to installation torque. Such correlations are widely used in the helical pile industry as a means for quality control and quality assurance. In the current study, a total of 10 test piles were installed while monitoring the installation torque continuously with depth. The recorded installation torque profiles were demonstrated to be accurate and repeatable. Field pile load tests were conducted and their results were analyzed to determine the interpreted ultimate capacity of the test piles. The results demonstrate that the ultimate capacity of large-diameter helical piles can be interpreted from pile load test data employing the failure criteria proposed by Elkasabgy and El Naggar in 2015 and Fuller and Hoy in 1970. The measured installation torque and corresponding ultimate capacity values were employed to define torque–capacity correlation (Kt) based on embedded pile area. It was demonstrated that the proposed Kt is suitable for large-diameter helical piles.

Field Testing of Axial Performance of Large-Diameter Helical Piles at Two Soil Sites

2018 ◽  
Vol 144 (3) ◽  
pp. 06017021 ◽  
Author(s):  
Weidong Li ◽  
D. J. Y. Zhang ◽  
D. C. Sego ◽  
Lijun Deng
Keyword(s):  
Large Diameter ◽  
Field Testing ◽  
Helical Piles

Multiphase Flow Field Trials on BP’s Magnus Platform

1987 ◽  
Vol 109 (3) ◽  
pp. 142-147
Author(s):  
T. J. Hill
Keyword(s):  
Multiphase Flow ◽  
Slug Flow ◽  
Field Data ◽  
Gamma Ray ◽  
Large Diameter ◽  
Field Trials ◽  
Ray Density ◽  
Flow Through ◽  
Improved Design ◽  
Oilfield Development

The trend toward offshore oilfield development schemes which utilize relatively long, large diameter, multiphase flowlines has resulted in a need for better design techniques for such systems. In order to validate these new and improved design methods it is necessary to compare them with good quality field data obtained from a variety of different multiphase lines. Therefore trials to determine the characteristics of the multiphase flow through 150 mm NB (6 in. NB) lines from four of the satellite wells in BP’s Magnus field were carried out during October, 1985. Using two gamma ray density gages, the flow regimes, and where possible the characteristics of slug flow, were identified over a range of flowrates in the different lines. Comparison of the data is made with the predictive techniques widely used in the industry.

Development of a digital SEM

1991 ◽  
Vol 49 ◽  
pp. 358-359
Author(s):  
A. Yamada ◽  
A. Shibano ◽  
K. Harasawa ◽  
T. Kobayashi ◽  
H. Fukuda ◽  
...  
Keyword(s):  
Large Diameter ◽  
Objective Lens ◽  
Large Specimen ◽  
Backscattered Electrons ◽  
Digital Scanning ◽  
Junction Type ◽  
High Resolution Images ◽  
Working Distance ◽  
Type Detector ◽  
Short Working

A newly developed digital scanning electron microscope, the JSM-6300, has the following features: Equipped with a narrower conical objective lens (OL), it allows high resolution images to be obtained easily at a short working distance (WD) and a large specimen tilt angle. In addition, it is provided with automatic functions and digital image processing functions for ease of operation.Conical C-F lens: The newly developed conical C-F objective lens, having low aberration characteristics over a wide WD range, allows a large-diameter (3-inch) specimen to be tilted up to 60° at short WD, and provides images with low magnifications starting at 10*. On the bottom of the lens, a p n junction type detector is provided to detect backscattered electrons (BE) from the specimen. As the narrower conical 0L increases the secondary electron (SE) detector's field intensity on the specimen surface, high SE image quality is obtained.

Boussinesq Wave Model Compared with Field Data

2001 ◽  
Author(s):  
Denis Morichon ◽  
Barbara Boczar-Karakiewicz ◽  
Edward B. Thornton
Keyword(s):  
Field Data ◽  
Wave Model

Mekanisme Dan Proteksi Jaminan Nasabah Pada Gadai Informal

Liquidity ◽  
2017 ◽  
Vol 6 (2) ◽  
pp. 103-109
Author(s):  
Yuri Nanda Larasati ◽  
Jafril Khalil
Keyword(s):  
Qualitative Research ◽  
Research Methods ◽  
Financial Services ◽  
Field Data ◽  
Qualitative Research Methods ◽  
Research Field ◽  
Consumer Society ◽  
Library Research ◽  
The Cost

Regulation of the financial services authority (OJK) No. 31/POJK.05/2016 on Venture had arranged that the financial services agency on the basis of the law of pledge is in coaching and supervision OJK. Yet the existence of laws – invitation to Governing Enterprise pawn shops causing business activities conducted by the above parties are not yet regulated. The condition is feared could cause harm to the consumer society. The purpose of this research is to know the procedures, mechanisms, protection of goods and guarantee the consumer on an informal pledge financing, methods of determination of the cost of maintenance of the goods and the goods of the execution mechanism of the pledge as well as protection for the collateral items are viewed from the side of the consumer by looking at laws-invitations and Sharia. To find out whether the pledge have gotten permission from OJK. This research uses qualitative research methods with the study of library research, field data and simulations. The approach used in this study is the empirical juridical approach. Elaboration upon the results is discussed further in this article.

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