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ASTM D4945-12 PDF

1 Nov ASTM D May Standard Test Method for High-Strain Dynamic Testing of Deep Foundations. Historical Version. ASTM D Pile Driving Analyzer ® Given: 2L/c= 12 ms = T. L. = 75 ft . Broken Piles: β < • “End bearing” is unreliable in long term for broken piles. Conforms to. ASTM D • H-piles – no issue. • Pipe piles – use protectors. • Concrete piles – protectors or - sensors in indentations.

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A qualified engineer shall approve the apparatus used for applying the impact force, driving appurtenances, test rigging, hoist equipment, support frames, templates, and test procedures.

The CASE analysis of high strain bearing capacity detection of single pile and tensile stress and compressive stress analysis of piling monitoring can be conducted; 2. Factors that may affect the d494-12 static capacity estimated from dynamic tests include, but are not limited to the: A permanent net penetration of as little as 2 mm per impact may indicate that sufficient asmt has occurred during the impact event to fully mobilize the capacity.

In addition, they are representative of the significant digits that should generally be retained. Force and velocity are typically derived from measured strain and acceleration.

The Engineer may analyze the acquired data using engineering principles and judgment to evaluate the integrity of the pile, the performance of the impact system, and the maximum compressive and tensile stresses occurring in the pile.

Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.

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China pit rims China pit bikes China moto pit bikes. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. The quality of the result produced by this test method is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.

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Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Contact Supplier Start Order.

Plans, specifications, or provisions or combinations thereof prepared by a qualified engineer may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program. Link to Active This link will always route to the current Active version of the standard. Output contents can be customized and multiple output methods are supported. If the Engineer does not have adequate previous experience for the specific site and pile type with the analysis of dynamic test data for tension capacity, then a static load test carried out according to Test Method Ashm should be used to verify tension capacity estimates.

ASTM D – 17 Standard Test Method for High-Strain Dynamic Testing of Deep Foundations

The CASE analysis of high strain bearing capacity detection of single pile and tensile stress and compressive stress analysis of piling monitoring can be conducted. Amplification, translation, rotation, filtering and other processing can be carried out for wave signals. Imperative sentences indicate mandatory provisions. Historical Version s – view previous versions of standard. Test Method D provides a direct and more reliable measurement of static tension capacity.

No other units of measurement are included in this standard. A qualified engineer should directly supervise the acquisition of field data and the interpretation of the test results so as to predict the actual performance and adequacy of deep foundations used in the constructed foundation.

Factors that may affect the axial static capacity estimated from dynamic tests include, but are not limited to the:. The analysis of a dynamic test will under predict the ultimate axial static compression capacity if the pile movement during the impact event is too small.

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Although interpretation of the dynamic test analysis may provide an estimate of the pile’s tension uplift capacity, users of this standard are cautioned to interpret conservatively the side resistance estimated from analysis of a single dynamic measurement location, and to avoid tension capacity estimates altogether for piles with less than 10 m embedded length.

ASTM D +dynamic bored pile test | Nguyen Huu Phuoc –

The Engineer should determine d49445-12 the size and shape of the pile, and the properties of the soil or rock beneath and adjacent to the pile, affect the amount of movement required to fully mobilize the static capacity.

China arm pit China soak pit China eec pit bike. Original asrm, velocity curve, force curve, force velocity curve, upper and lower traveling wave curves, displacement velocity curve, energy curve, tensile stress curve and other display modes can be selected for observation, processing and analysis. Output contents can be customized and multiple output methods are supported; 5. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method.

Original curve, velocity curve, force curve, force velocity curve, upper and lower traveling wave curves, displacement velocity curve, energy curve, tensile stress curve and other display modes can be selected for observation, processing and analysis; 4.

However, high displacement driven piles may require greater movement to avoid astj predicting the static capacity, and cast-in-place piles often require a larger cumulative permanent net penetration for a series of test blows to fully mobilize asgm capacity.

For a specific precautionary statement, see Note 4.

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