ASTM D7400 PDF

Standard Number, ASTM D – Title, Standard Test Methods for Downhole Seismic Testing. Status, Current. Publication Date, Standard Test Methods for Downhole Seismic Testing. Status: Withdrawn · Replaced by: ASTM D Buy this standard. Price: SEK. PDF. Add to cart. ASTM D Significance and Use. The seismic downhole method provides a designer with information pertinent to the seismic wave velocities of the materials .

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The quality of the results produced by this standard is dependent on the competence of the personnel performing it, and asttm suitability of the equipment and facilities.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The Downhold Seismic DS investigations are similar to CS investigations, but require only one borehole to provide shear and compressional velocity wave profiles.

Enter your account email address to request asgm password reset: Contact Olson Instruments when adding on to an existing system, or purchasing multiple systems as some of the components are common to other test methods. Sustainable Development Goals and standardisation, how do they connect?

Standard Test Methods for Downhole Seismic Testing

The electronic file may not be reproduced in any way. Users of this standard are cautioned that d7400 with Practice D does not in itself assure reliable results. No items in cart.

Special consideration should be given to the types of receivers used and their configuration. In addition, they are representative of the significant digits that should generally be retained.

ASTM D – 08 Standard Test Methods for Downhole Seismic Testing

Two methods are discussed, which include using either one or two downhole sensors receivers. Combining values from the two systems may result in nonconformance with this standard. The Crosshole Seismic CS system and method v7400 shear and compressional wave velocity versus depth profiles.

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These aastm methods primarily concern the actual test procedure, data interpretation, and specifications for equipment which will yield uniform test results. Content only available by subscription. Message to your colleague.

There were no books found for the applied search filters. It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering design. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard.

ASTM D – 14 Standard Test Methods for Downhole Seismic Testing

What is a standard? Data reduction and astmm is limited to the identification of various seismic wave types, apparent velocity relation to true velocity, example computations, use of Snell’s law of refraction, and assumptions. Subscribe on standards with our subscription service. Also included is an optional method intended for use on projects which do not require measurements of a high degree of precision.

Contact us svenska Login. Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey.

Inch-pound units are provided for convenience. These dynamic soil and rock properties are often utilized for earthquake design analyses necessary for certain structures, liquefaction potential studies, site development, and dynamic machine foundation design.

The DS method uses a hammer source at the surface to impact a wood plank and generate shear and compressional waves. Data reduction and interpretation is limited to the identification of various seismic wave types, apparent velocity relation to true velocity, example computations, use of Snell’s law s7400 refraction, and assumptions. Reporting of test results in units other than SI shall not asm regarded as non-conformance with this standard.

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Read more about SIS Subscriptions. Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey. A preferred method intended to obtain data for use on critical projects where the highest quality data is required is included. Please login to your authorized staff account to use this feature.

Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided. Another important use of estimated shear wave velocities in geotechnical design is in the liquefaction assessment of soils. Sorry, this content is unavailable because your browser does not support iframes.

The OE Website is loaded with Tech Brief and project photos using the equipment shown on this website. Another assumption inherent in the test methods is that the stratigraphic medium to be characterized can have transverse isotropy. Enter your personal account email address to request a password reset: In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. This is typically accomplished by coupling a plank to the ground near the borehole and then impacting the plank in the vertical and horizontal directions.

NDT System Add-On — Crosshole / Downhole Seismic

No further reproductions authorized. The energy from these impacts is then received by a pair of matching three component geophone receivers, which have been lowered downhole and are spaced asstm to 10 ft 1. The values stated in inch pound units may not be exact equivalents; therefore, they shall be used independently of the SI system.