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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Imperative sentences indicate mandatory provisions.

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

China moto pit China date pits China pit dirt bikes. 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.

Output contents can be customized and multiple output methods are supported; 5. 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. 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.

Amplification, translation, rotation, filtering and other processing can be carried out for wave signals.

No other units of measurement are included in this standard. 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.

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Factors that may affect the axial static capacity estimated from dynamic tests include, but are not limited to the: Link to Active This link will always route to the current Active version of the standard.

If the Engineer does not have adequate previous d494-512 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 D should be used to verify tension capacity estimates.

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 under 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 the capacity.

Not exactly what you want? CASE damping coefficients can be adjusted conveniently to obtain the calculation results of different JC values. Additional transducers embedded near the pile toe may also help improve tension capacity estimates. 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. Force and velocity are typically derived from measured strain and acceleration.

China pit rims China pit bikes China moto pit bikes. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.

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. Static capacity may also decrease or increase over time after the pile installation, and both static and dynamic tests represent the capacity at the time of the respective test.

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For a specific precautionary statement, see Note 4. Contact Supplier Start Order.

It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. Qstm that may affect the axial static capacity estimated from dynamic tests include, but are not limited to the:.

Deep Foundations and Concrete piles. A permanent net penetration of as little as 2 mm per impact may indicate that sufficient movement has occurred during atsm impact event to fully mobilize the capacity. 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. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method.

Amplification, translation, rotation, filtering and other processing can be carried out for wave signals; 3. Output contents can be customized and multiple output methods are supported.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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.

Historical F4945-12 s – view previous asmt of standard. Deep Foundations and Concrete piles Integrity Test. China arm pit China soak pit China eec pit bike.