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 Status: Withdrawn · Replaced by: ASTM D Buy this standard.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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Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey. Enter your account email address to request a password reset: The instruments are coupled to the side of the grouted borehole inclinometer casing, allowing for the detection of shear and compressional waves as they pass between the receivers.
In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. Combining values from the two systems may result in nonconformance with this standard.
Sorry, this content is unavailable because your browser does not support iframes. Another important use of estimated dd7400 wave velocities in geotechnical design is in the liquefaction assessment of soils.
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ASTM D7400 – 17
These test methods primarily concern the actu. Link to Active This link will always route to the current Active version of the standard. Two methods are discussed, which include using either one or two downhole sensors receivers. Subscribe on standards – Read more. The Downhold Seismic DS investigations are similar to CS investigations, but require only one borehole to provide shear and compressional velocity wave profiles. Shopping cart Close cart 0, foreach: Message to your colleague.
These test methods primarily concern the actual test procedure, data interpretation, and specifications for equipment which will yield uniform test results. In d74400 the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise.
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In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. Enter your personal account email address to request a password reset: Historical Version s – view previous versions of standard. Special consideration should be given to the types of receivers used and their configuration. This implicitly combines two separate systems of units; that is, the absolute dd7400 and the gravitational system.
The values stated asym inch pound units may not be exact equivalents; therefore, they shall ast used independently of the SI system. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. When you use our service you can be assured the latest editions and easy access.
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.
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. Other items addressed include source-to-receiver spacing, drilling, casing, grouting, a procedure for borehole installation, and conducting actual borehole and seismic cone tests.
Transverse isotropy is a particularly simple form of anisotropy because velocities only vary with vertical incidence angle and not with azimuth. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Standard – Standard Test Methods for Downhole Seismic Testing ASTM D –
Also included is an optional method intended for use on projects which do not require measurements of a high degree of precision. A preferred method intended to obtain data for use on critical projects where the highest quality data is required is included.
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Report error on page. Reporting of test results in units other than SI shall not be regarded as non-conformance with this standard. The DS method uses a hammer source at the surface to impact a wood plank and generate shear and compressional waves.
It astn beyond the scope of these test methods to consider significant digits used in analysis methods for engineering design.
Read more about SIS Subscriptions. Print 1 2 3 4 5 page sstarting from page current page. A preferred method intended to obtain data for use on critical projects where the highest quality data is required is included.
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 satm to 10 ft 1. The electronic file may not be reproduced in any way.
Contact us svenska Login. Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided. Special consideration should be given to the types of receivers used and their configuration. 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.
Click here for Agents. 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.
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