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 Status: Withdrawn · Replaced by: ASTM D Buy this standard.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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These test methods primarily concern the actual test procedure, data interpretation, and specifications for equipment which will yield uniform test results.

Two methods are discussed, which include using either one or two downhole sensors receivers.

Enter your personal account email address to request a password reset: Special consideration should be given to the types of receivers used and their configuration. Read more atsm SIS Subscriptions. These dynamic soil and aetm properties are often utilized for earthquake design analyses necessary for certain structures, liquefaction potential studies, site development, and dynamic machine foundation design. Accurate in-situ P-wave and S-wave velocity profiles are essential in geotechnical foundation designs.

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NDT System Add-On — Crosshole / Downhole Seismic

The most complete version of this downhole system, as manufactured by Olson Instruments, is comprised of a borehole source capable of generating shear and compressional waves and a pair of matching three component triaxial geophone receivers. Other items addressed include source-to-receiver spacing, drilling, casing, grouting, a procedure for borehole installation, and conducting actual borehole and seismic cone tests.

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 of refraction, and assumptions.

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Another important use of estimated shear wave velocities in geotechnical design is in the liquefaction assessment of soils. In addition, they are representative of the significant digits that should generally be retained.

Please sign into an account with a subscription to this content, or email for help at support madcad. Reporting of test results in units other than SI shall not be regarded as non-conformance with this standard.

Click here for Agents. All ast, Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineeringworld reknowned for NDT consulting.

Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided. If you like to setup a quick demo, let us know at support madcad. Special consideration should be given to the types of receivers used and their configuration. In addition, the material damping can be determined from CS tests. Work Item s – proposed revisions of this standard.

The electronic file may not be reproduced in any way. The Crosshole Seismic CS system and method determine shear and compressional wave velocity versus depth profiles.

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

The values stated in inch pound units may not be aztm equivalents; therefore, they shall be used independently of the SI system. A preferred method intended to ast, data for use on critical projects where the highest quality data is required is included.

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

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Standard Test Methods for Downhole Seismic Testing

Link to Active This link will always route to the current Active version of the standard. In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs.

Also included is an optional method intended for use on projects which do d74000 require measurements of a high degree of precision. Link to Active This link will always route to the current Active version of the standard. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard.

D Standard Test Methods for Downhole Seismic Testing, –

Work Item s – proposed revisions of this standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The OE Website is loaded with Tech Brief and project photos using the equipment shown on this r7400. Transverse isotropy is a particularly simple form of anisotropy because velocities only vary with vertical incidence angle and not with azimuth.

Your shopping cart is empty. The DS method uses a hammer source at the surface to impact a wood plank and generate shear ashm compressional waves. Shopping cart Close cart 0, foreach: The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard.