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Pile Testing Articles & Analysis
20 articles found
SonicCPT is an exciting and rapidly developing technique from Royal Eijkelkamp that is reducing early refusals in CPT soundings by carefully applying a vibration, when needed, to the CPT string. The technique actually has a history dating back almost 40 years to when Sasaki et al. (1983) reported their work to develop and deploy their vibratory cone, which they used for liquefaction analysis. ...
Monitoring Retaining Wall The load cells are placed in the retaining walls to monitor the changes behind and analyze the effectiveness of the restraining system. Diaphragm or Sheet Pile Wall Load Cells are established in the tie-back anchor systems to gauge the stability of the diaphragm or sheet pile wall. ...
Formerly known as the American Society for Testing and Materials, ASTM has been setting a widely-recognized and revered standard for testing and evaluating materials for well over a century. ...
The EPA has designed other testing methods, including the SPLP (Synthetic Precipitation Leaching Procedure) and MEP (Multiple Extraction Procedure) tests. ...
Major projects in Beijing office responsible person, in accordance with Beijing's commitment to the 2022 Beijing Winter Olympic competition venues have held International Olympic Committee to achieve the test match requirements in 2020, to achieve the basic completion. The person in charge of the major project office of Beijing said,accordance to Beijing's Promise,venues will be ...
Furthermore, the Corps, in a separate attempt to limit project costs, initiated a sheet pile load test (E-99 Study), but misinterpreted the results and wrongly concluded that sheet piles needed to be driven to depths of only 17 feet (1 foot = 0.3048 meters) instead of between 31 and 46 feet. ...
Foundation Mapping Determining the three-dimensional design of foundations for telecommunications towers, buildings and road signs can be impractical and sometimes nearly impossible using conventional means. Properly applied geophysical test methods, hand probing and shallow test pits provide a very cost-effective and non-destructive approach to determining the ...
This paper presents the results of a series of displacement-controlled cyclic axial loading tests of model jacked piles in dry calcareous sand. The tests were conducted using a large test facility comprising a test chamber 1.0 m in internal diameter and 1.55 m in height. Model instrumented aluminum jacked ...
It is demonstrated that the patterns of behavior in these tests are similar to those observed in model pile tests and that the constant normal stiffness (CNS) condition is required to account for the effects of the volume changes that occur as soil adjacent to a pile is sheared. ...
Derivation of p-y curves from lateral load tests on deep foundations is a tedious and expensive task, requiring large numbers of strain gages along the length of the pile to develop bending moment versus depth relationships. ...
Two series of tests were performed on calcareous and silica sands in different test chamber sizes and with different base conditions to investigate the influence of test chamber boundary conditions on model pile foundation behavior.The first series of tests investigated the effects of shear resistance between the ...
Due to time and money constraints, conventional pile-load tests tend to be limited and, consequently, design relies on relatively high factors of safety. In this paper, a new and simple method of performing pile-load tests is introduced. The suggested method uses a separable pile shoe with a reduced-size sliding ...
A simple and inexpensive air bag system for allowing measurement of the deflected shape of laterally loaded piles has been developed. The air bag system may be used for hollow piles that have already been installed. The system includes an inclinometer casing that is held against the inner wall of the pile by an inflated air bag. ...
An uncemented carbonate sand has been subjected to cyclic loading in a modified shearbox apparatus under constant normal load and constant normal stiffness conditions. The behaviour in the tests using a constant normal stiffness shows many similarities with the variation of skin friction on piles under cyclic loading. It is demonstrated that the response in the ...
This paper examines the static and cyclic behavior of different types of carbonate sediments and one type of silica sand under direct shear test conditions. For both static and cyclic loading, the effects of interface surface roughness, overburden pressure, void ratio, size and shape of grains, and saturation are studied. ...
The technique is particularly attractive because the field tests may be performed quickly and economically on a test pile or piles installed at the site to determine bearing capacity and/or drivability. The proposed test and analyses procedures were applied to a single pile and ...
A synthetic clay soil mixture was designed and fabricated to comply with similitude requirements set forth in a dynamic scale-model pile group foundation test. The prototype soil was a stiff, fissured, overconsolidated clay soil at the University of Houston Pile Test Facility. The dynamic response of the model soil was determined ...
This paper presents results of large-size one-dimensional compression and direct shear tests performed on lightweight aggregate. The compressibility and shear strength characteristics of the lightweight aggregate are compared with those of normal-weight aggregate using the same experimental setup. Results of the direct shear tests performed to determine the angle ...
This is an account of a small-scale model study to examine the influence of the shape of pile shoes on the behavior of piles. A model pile 32 mm diameter was driven at a constant rate of penetration into sand overlying a layered clay in a container and with four different shapes of pile shoes. The test results ...
The nonlinear subgrade reaction method (P-y curves) is widely used for the design of laterally loaded piles. This method replaces the soil reaction with a series of independent nonlinear Winkler springs.A preliminary semi-empirical approach for the determination of P-y curves using data obtained from a flat dilatometer test (DMT) is presented and evaluated. ...