Large-diameter bored and grouted piles in marine sediments of the Red Sea

1988 ◽  
Vol 25 (4) ◽  
pp. 826-831 ◽  
Author(s):  
Fouad M. Ghazali ◽  
Elias Sotiropoulos ◽  
Osama A. Mansour
Keyword(s):  
Red Sea ◽  
Marine Sediments ◽  
Large Diameter ◽  
Load Test ◽  
Carbonate Sediments ◽  
Load Testing ◽  
Test Results ◽  
Concrete Piles ◽  
Pile Load Test ◽  
Concrete Casting

This work presents the construction procedures and pile load test results of large-diameter bored and grouted cast-in-place concrete piles in coral formations and carbonate sediments in the Red Sea. Construction details and difficulties involved in the process of site preparation, borings, reinforcement, concrete casting, and grouting are described and discussed. Geotechnical engineering considerations that led to the selection of this type of foundation and the conditions of the site are included. Key words: pile foundations, bored and grouted, marine sediments, construction methodology, load testing.

Pile load tests for the Calgary Air Terminal building

1983 ◽  
Vol 20 (2) ◽  
pp. 353-361
Author(s):  
J. Bertok ◽  
M. Berezowski
Keyword(s):  
Technical Note ◽  
Load Test ◽  
Load Testing ◽  
Test Results ◽  
Concrete Piles ◽  
Building Foundation ◽  
History Of ◽  
Load Tests ◽  
Pile Load Tests ◽  
Pile Type

This technical note describes a case history of pile load tests for the Calgary Air Terminal building. One drilled, cast-in-place, concrete caisson, socketed into bedrock, and compacted expanded-base concrete piles were tested and evaluated to select a pile type that would support column loads up to 6700 kN. This note describes the pile test program, interprets the load test results, and summarizes the pile specifications and installation. Keywords: building foundation, piles, load testing, interpretation, installation.

scholarly journals LARGE DIAMETER PILE LOAD TEST WITH A CASE STUDY USING OSTERBERG - CELL

2018 ◽  
Vol 30 (1) ◽  
Author(s):  
S. K. Bagui ◽  
B. C. Dinesh ◽  
Khan Md. Kamal ◽  
Ahsan Ahmad Sharif Shajib ◽  
Inthaqab Wahid Ruso
Keyword(s):  
Large Diameter ◽  
Load Test ◽  
Silty Sand ◽  
Load Testing ◽  
Downward Movement ◽  
Loading Test ◽  
Static Loading Test ◽  
Reverse Circulation ◽  
Pile Load Test

Static loading test using single level bidirectional –Cell was tested in March 2017 atPaira bridge in Bangladesh for initial load testing. Soil consists of soft silt with traced clay from0.0 m to 10.5 m underlain by various layer with very dense silty sand at the toe level and below.Pile was constructed reverse circulation method. Drilling slurry was composed of bentonite sluryfor 2.5 m diameter pile. The load cells were attached to a reinforcing cage at 18 m above toe.Static load test was 28days of casting the pile and tested. Testing was carried as per ASTM 1143with load increment 7.5 % estimated ultimate load. It was observed that downward movement ofreaching 220 mm and locked downward movement and O-Cell was given force for upwardmovement to find out skin fraction. Detailed analysis was carried out and it was found thatultimate load consisted of 49 MN skin frication and 30 MN end bearing sand safe design loadwas calculated as 33 MN.

Predicting the Ultimate Bearing Capacity of Single Piles Based on CPTU

2011 ◽  
Vol 243-249 ◽  
pp. 4402-4407
Author(s):  
Yong Hong Miao ◽  
Guo Jun Cai ◽  
Song Yu Liu
Keyword(s):  
Load Test ◽  
Load Testing ◽  
Pile Capacity ◽  
Piezocone Penetration Test ◽  
Load Carrying ◽  
Load Tests ◽  
Pile Load Test ◽  
Single Piles ◽  
Pile Load Tests ◽  
Best Fit

Six methods to determine axial pile capacity directly based on piezocone penetration test (CPTU) data are presented and evaluated. Analyses and evaluation were conducted on three types piles that were failed during pile load testing. The CPT methods, as well as the CPTU methods, were used to estimate the load carrying capacities of the investigated piles (Qp ). Pile load test were used to determine the measured load carrying capacities (Qm). The pile capacities determined using the different methods were compared with the measured pile capacities obtained from the pile load tests. Two criteria were selected as bases of evaluation: the best fit line for Qp versus Qm and the arithmetic mean and standard deviation for the ratio Qp /Qm. Results of the analyses showed that the best methods for determining pile capacity are the CPTU methods.

Load tests on bedrock

1970 ◽  
Vol 7 (4) ◽  
pp. 464-470 ◽  
Author(s):  
J. L. Seychuk
Keyword(s):  
Elastic Material ◽  
Steel Plate ◽  
Applied Pressure ◽  
Load Test ◽  
Vertical Load ◽  
Subgrade Reaction ◽  
Concrete Piles ◽  
Limestone Bedrock ◽  
Load Tests ◽  
Pile Load Test

Load tests involving the use of a steel plate, a concrete socket, and full scale concrete piles were carried out at two separate sites in Ontario to determine the load bearing characteristics of shale and limestone bedrock. It was found that the essentially sound bedrock behaved as an elastic material under the maximum applied pressure of 260 tons/sq. ft (254 × 104 kg/m2). In addition to the vertical load tests on the rock, a lateral pile load test was carried out to evaluate the modulus of horizontal subgrade reaction of the fissured clay overburden at one of the sites.

Live-Load Test Results of Missouri’s First High-Performance Concrete Superstructure Bridge

2003 ◽  
Vol 1845 (1) ◽  
pp. 96-103 ◽  
Author(s):  
Yumin Yang ◽  
John J. Myers
Keyword(s):  
Load Distribution ◽  
High Performance ◽  
High Performance Concrete ◽  
Large Diameter ◽  
Load Test ◽  
Strain Gauges ◽  
Live Load ◽  
Test Results ◽  
Live Load Distribution ◽  
Live Load Test

For its significant economical savings and greater design flexibility, high-performance concrete (HPC) is becoming more widely used in highway bridge structures. High-performance bridges with HPC and large-diameter prestressed strands are becoming attractive to designers. Bridge A6130 is the first fully HPC superstructure bridge in Missouri. The bridge has HPC cast-in-place deck and high-strength concrete girders reinforced with 15.2-mm (0.6-in.) diameter strands. The bridge was instrumented with embedded strain gauges and thermocouples to monitor the early-age and later-age behavior of the structures from construction through service. To investigate the overall behavior of the bridge under live load, a static live-load test was developed and carried out. During the live-load test, 64 embedded vibrating wire strain gauges and 14 embedded electrical-resistance strain gauges were used to acquire the changing strain rate in the bridge caused by the varying live-load conditions. Girder deflections and rotations were also recorded with external sensors and a data acquisition system. Based on the test results, the load distribution to the girders was studied. The AASHTO specifications live-load distribution factor recommended for design was compared with the measured value and found to be overly conservative. The AASHTO load and resistance factor design live-load distribution factors recommended for design were found to be comparable to measured values. Two finite element models were developed with ANSYS and compared with measured values to investigate the continuity level of the Missouri Department of Transportation interior bent detail.

Viral Load Test Reports

2001 ◽  
Vol 125 (12) ◽  
pp. 1546-1554
Author(s):  
Diane P. Francis ◽  
K. Michael Peddecord ◽  
Louise K. Hofherr ◽  
J. Rex Astles ◽  
William O. Schalla
Keyword(s):  
Viral Load ◽  
Telephone Survey ◽  
Health Department ◽  
Load Test ◽  
Load Testing ◽  
Test Results ◽  
Viral Load Testing ◽  
Viral Load Test ◽  
Test Kit ◽  
Hiv 1

Abstract Context.— Human immunodeficiency virus (HIV) RNA testing (viral load testing) is increasingly important in the care of patients infected with HIV-1 to determine when to initiate, monitor, and change antiretroviral therapy. Patient viral load testing information is communicated to the clinician through the laboratory test report. Objectives.—To examine the format and information used in reporting viral load testing results and determine the clarity of the information provided in these reports. Design.—Patient test reports with all personal identifiers removed were requested of viral load testing laboratories participating in a telephone survey of laboratory practices. Hospital, independent, health department, and “other type” laboratories identified as university-associated laboratories participated in the telephone survey. Results.—Thirty-seven unique test reports were collected. All laboratories reported results in copies/mL, while 14% also reported results as “log10 copies/mL.” The test kit was identified by only 24% of the laboratories. Reportable ranges were specified by 70% of the laboratories, but there was considerable variation in terminology. One laboratory reported a viral load copy number below the manufacturer's test kit lower limit of sensitivity. The layout and format differed among reports. Some results were expressed in log10, others contained nonsignificant integers, while others contained exponential numbers. Supplemental information in some reports included previous patient test results and significance of changes from baseline. The format of some reports made it difficult to read the report information and interpret the testing results. Conclusion.—This study emphasizes the importance of standardizing the reporting of HIV-1 viral load test results to minimize result misinterpretation and incorrect treatment.

scholarly journals A Local Design Method for Pile Foundations

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Nunzia Letizia ◽  
Chiara Iodice ◽  
Alessandro Mandolini
Keyword(s):  
Design Method ◽  
Load Test ◽  
Preliminary Design ◽  
Test Results ◽  
Reasonable Accuracy ◽  
Case Histories ◽  
Original Design ◽  
Settlement Ratio ◽  
Pile Load Test ◽  
The One

The work at hand attempts to propose a local pile design method based on pile load test results for a reference site. Such LPDM is simply based on the identification of three dimensionless quantities, such as the capacity ratio CR, the stiffness ratio SR, and the group settlement ratio Rs. To prove the LPDM reliability, experimental data collected during years in the Neapolitan area (Italy) have been used to obtain the abovementioned coefficients. Then, LPDM has been applied, as a preliminary design method, to three well-documented case histories applying capacity and settlement-based design (CBD and SBD) approaches. The satisfactory agreement between the geometry in the original design of piles and the one obtained by applying the LPDM proves that the proposed methodology may be very helpful for preliminary design, allowing for reasonable accuracy while requiring few hand calculations.

Performance of helical piles in oil sand

2009 ◽  
Vol 46 (9) ◽  
pp. 1046-1061 ◽  
Author(s):  
Mohammed Sakr
Keyword(s):  
Full Scale ◽  
Load Test ◽  
Test Results ◽  
Lateral Loads ◽  
Oil Sand ◽  
Deep Foundation ◽  
Helical Piles ◽  
Load Tests ◽  
Pile Load Test ◽  
Pile Load Tests

The results of a comprehensive pile load-test program and observations from field monitoring of helical piles with either a single helix or double helixes installed in oil sand are presented in this paper. Eleven full-scale pile load tests were carried out including axial compression, uplift, and lateral load tests. The results of the full-scale load tests are used to develop a theoretical design model for helical piles installed in oil sand. Test results confirm that the helical pile is a viable deep foundation option for support of heavily loaded structures. The test results also demonstrated that circular-shaft helical piles can resist considerable lateral loads.

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