9-Foot (2.75m) Diameter Drilled Shafts at Cranston Viaduct: Design, Load Testing, and Construction

2004 ◽  
Author(s):  
Aly M. Mohammad ◽  
Karen C. Armfield
Keyword(s):  
Drilled Shafts ◽  
Load Testing ◽  
Design Load

scholarly journals ANALYSIS OF EUCALYPTUS GLUED-LAMINATED TIMBER PORTICOS STRUCTURAL PERFORMANCE

2016 ◽  
Vol 40 (5) ◽  
pp. 931-939 ◽  
Author(s):  
Sandra Maria Ferreira Couri Petrauski ◽  
José de Castro Silva ◽  
Alfredo Petrauski ◽  
Ricardo Marius Della Lucia
Keyword(s):  
Mechanical Performance ◽  
Structural Performance ◽  
Load Testing ◽  
Bonding Pressure ◽  
Resorcinol Formaldehyde ◽  
Average Value ◽  
Design Load ◽  
Glued Laminated Timber ◽  
Real Scale ◽  
Glued Joints

ABSTRACT This study evaluated the structural behavior of porticos made from eucalyptus glued boards, using wood of Eucalyptus sp and resorcinol formaldehyde adhesive. Three units, in real scale, of tri-articulated straight porticos, with a 5 meter porthole and a 26º inclination, capable to support tiles covering placement were designed, constructed and subjected to load testing, until rupture. The amount of adhesive used in the construction of the porticos was 250 g/m2 and the bonding pressure of 1.3 MPa. The Hankinson model was employed as an estimator of the glued joints strength, under different angles between the fibers. The average value for the last resistance of the structures was 4.63 times the design load, according to the criteria established by the ABNT, 1997. The structures showed satisfactory mechanical performance and deformations lower than the ones allowed by the standard. It was concluded there is technical feasibility to manufacture porticos fully bonded with small thickness veneers.

Dynamic Load Testing of Drilled Shafts at National Geotechnical Experimentation Sites

2002 ◽  
Author(s):  
Brent Robinson ◽  
Frank Rausche ◽  
Garland Likins ◽  
Carl Ealy
Keyword(s):  
Dynamic Load ◽  
Drilled Shafts ◽  
Load Testing

Full-scale field load testing of long drilled shafts with enlarged base constructed in marine sediment

2016 ◽  
Vol 35 (3) ◽  
pp. 346-356 ◽  
Author(s):  
Kai-Fu Liu ◽  
Xin-Yu Xie ◽  
Zhe Luo ◽  
Qing-Hong Hu ◽  
Chun-Xia Huang
Keyword(s):  
Marine Sediment ◽  
Full Scale ◽  
Drilled Shafts ◽  
Load Testing ◽  
Scale Field

scholarly journals Assessment of shear strength from measuring while drilling shafts in Florida limestone

2019 ◽  
Vol 56 (5) ◽  
pp. 662-674
Author(s):  
Michael Rodgers ◽  
Michael McVay ◽  
David Horhota ◽  
Jon Sinnreich ◽  
Jose Hernando
Keyword(s):  
Real Time ◽  
Rock Strength ◽  
Penetration Rate ◽  
Drilled Shafts ◽  
Spatial Uncertainty ◽  
Drilled Shaft ◽  
Load Testing ◽  
Drilling Parameters ◽  
Time Assessment ◽  
Shaft Capacity

The focus of this research is the real-time assessment of drilled shaft capacity based on the unconfined compressive strength (qu) obtained from measuring while drilling (MWD). Measures of qu, a function of rock strength commonly used in drilled shaft design, are provided through five monitored drilling parameters: torque, crowd, rotational speed, penetration rate, and bit diameter. Monitored shaft installations took place at three separate locations on drilled shafts, which were subsequently load tested. Using the qu values obtained from MWD, side shear was estimated in portions of each shaft where instrumented segments indicated the side shear was fully mobilized for direct comparison. To consider all of the current side shear equations used in Florida drilled shaft design, the estimation of tensile strength (qt) in real time was also needed. This led to a theoretical approach to establish the qt/qu relationship that was later verified empirically and provided new correlations between material and mechanical properties of Florida geomaterials. A comparative analysis indicated that the results from multiple established side shear equations, used with qu from MWD, align well with the results obtained from load testing. This suggests that estimating drilled shaft capacity from MWD is viable to reduce spatial uncertainty.

Inclined Tensile Load Testing on Short Drilled Shafts

2012 ◽  
Vol 35 (2) ◽  
pp. 103343
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
Anand J. Puppala ◽  
Thornchaya Wejrungsikul ◽  
Richard S. Williammee ◽  
...  
Keyword(s):  
Tensile Load ◽  
Drilled Shafts ◽  
Load Testing

Geotechnical Resistances of Drilled Shafts in Triassic Basin Sedimentary Rocks

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
John Turner
Keyword(s):  
Design Tool ◽  
Drilled Shafts ◽  
Late Triassic ◽  
Load Testing ◽  
Rift Basins ◽  
Base Resistance ◽  
Load Tests ◽  
The Common ◽  
Drilled Shaft Foundations

Load tests on drilled shaft foundations with rock sockets in sedimentary formations associated with various Triassic Basins in the Mid-Atlantic region show that some generalizations are possible for estimating geotechnical resistances. Axial load tests on drilled shafts in locations several hundred miles apart produce surprisingly similar results. The common feature is the geology: all of the load-tested rock sockets considered were constructed in sedimentary rock associated with one of the rift basins that developed in response to breaking apart of the supercontinent Pangaea that began during the late Triassic Period (about 220 million years ago) and coincided with opening of the Atlantic Ocean. More specifically, all of the tested rock sockets were in the ‘red bed’ facies of the rift basin sediments consisting of reddish-brown siltstone, sandstone, and shale. Each of the projects described herein and the associated load tests are described and used to illustrate fundamental principles of rock socket design and how load testing can be used as a design tool. The important role of quality construction, in combination with quality assurance through inspection and testing, is emphasized, especially as it relates to the evaluation of base resistance for rock socket design.

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