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 Status: Withdrawn · Replaced by: ASTM D Buy this standard.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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Two methods are discussed, which include using either one or two downhole sensors receivers. Please login to your authorized staff account to use this feature. It is beyond d74400 scope of these test methods to consider significant digits used in analysis methods for engineering design. Inch-pound units are provided for convenience.
Combining values from the two systems may result in non-conformance with the standard. Another important use of estimated shear wave velocities in geotechnical design is in the liquefaction assessment of soils. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. Soil and Rock II: Special consideration should be given to the types of receivers used and their configuration. ASTM grants you a license as follows: 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.
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. Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided.
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In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise. It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering design. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
In addition, the material damping can be determined from CS tests. Read more about SIS Subscriptions. Data reduction and interpretation is limited to the identification of various seismic wave types, e7400 velocity relation to asttm velocity, example computations, use x7400 Snell’s law of refraction, and assumptions.
Subscribe on standards – Read more. 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.
ASTM D – 17 – Standard Test Methods for Downhole Seismic Testing
The values stated in inch pound units may not be exact equivalents; therefore, they shall be used independently of the SI system. Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided. Aastm included is an optional method intended for use on projects which do not require measurements of a high degree of precision. In addition, they are representative of the significant digits that should generally be retained.
Register for a trial account. The Crosshole Seismic CS system and method determine shear and compressional wave velocity versus depth profiles. Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey.
Work Item s – proposed revisions of this standard.
What is a standard? Historical Version s – view previous versions of standard. Link to Active This link will always route to the current Active version of the standard. 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.
A preferred method intended to obtain data for use on critical projects where the highest quality data is required is included.
NDT System Add-On — Crosshole / Downhole Seismic
Other items addressed include source-to-receiver spacing, drilling, casing, grouting, a procedure for borehole installation, and conducting actual borehole and seismic cone tests. Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey. The DS method uses a hammer source at the surface to impact a wood plank and generate shear and compressional waves.
The standard is now in your shopping cart. A preferred method intended to obtain data for use on asttm projects where the highest quality data is required is included. This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. There were no books found for the applied search filters.