This standard is issued under the fixed designation D/DM; the number 1 This practice is under the jurisdiction of ASTM Committee D18 on Soil and. GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes. ASTM D/DM Standard Practice for Thin-Walled Tube Sampling of Fine-Grained Soils for Geotechnical Purposes. standard by.
|Published (Last):||14 April 2015|
|PDF File Size:||3.32 Mb|
|ePub File Size:||14.51 Mb|
|Price:||Free* [*Free Regsitration Required]|
The double-tube samplers are thicker walled and require special considerations for an outside cutting shoe and not the inner thin-walled liner tube. Such samplers include driven split barrel samplers and soil coring devices Test Methods DDand Practice D Longer time periods may be allowed depending on logistics and the quality assurance requirements of the exploration plan.
Advanced tests, such as consolidated, undrained triaxial compression Test Method D testing, coupled with one dimensional consolidation tests Test Methods D and D are performed for better understanding the relationship between stress history and the strength and compression characteristics of the soil as described by Ladd and Degroot, 4.
Do not show this again. Subsurface geotechnical explorations should be reported in accordance with Practice D Tubes of thicker gauge may be requested when re-use is anticipated see 6. Softer formations may require sharper cutting angles of 5 to 10 degrees, however, sharp angles may d15887 easily damaged in deeper borings.
This ASTM standard is not intended adtm represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a satm many unique aspects. It is not possible to buy in the shop – please contact us. The piston sampler Practice D uses a thin-walled tube. Samples that must be obtained by driving should be labeled as such to avoid any advanced laboratory testing for engineering properties.
The wstm of slough, cuttings, or remolded soil in the top of the samples should be confirmed to ensure stable conditions 7. Gravelly soils cannot be sampled and gravel will damage the thin-walled tubes. Soil samples inside the tubes can be readily evaluated for disturbance or other features such as presence of fissures, inclusions, layering or voids using X-ray radiography D if facilities are available.
This practice discusses some aspects of sample preservation after the ashm event. This is because once astk core is in contact with the steel tube, there are galvanic reactions between the tube and the soil which generally cause the annulus core to qstm with time.
The most commonly used tube is the 3-in. You must be logged in to sign up for monitoring You must be logged in to sign up for subscription. Wall thickness may be changed 5. Disturbance and sample quality can be evaluated by looking at recompression strains in the One-Dimensional Consolidation test see Andressen and Kolstad 5. Other soil samplers may be used for sampling these soil types.
Users of this practice are cautioned that compliance with Practice D does not in itself ensure reliable results. For more information on preservation and transportation process of soil samples, consult Practice D Consolidation test specimens are generally larger diameter than those for strength testing and larger diameter soil cores may be required.
Active Risk Management
Active view current version of standard. Note This practice does not apply to liners used within the samplers. Disturbance will result in errors in accurate determination of both yield stress 5.
Activation of your subscription failed – please try again later or contact us. The printed version is available at half price when you buy the electronic version.
Activation of monitoring failed – please try again later or contact us. The recommended combinations of A rcutting angle, and C r are given below also see 6.
The quality of the e1587 produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.
Piston samplers in Practice D use thin-walled tubes. If samples are taken in uncased boreholes the cores should be inspected for any sidewall contamination.
ASTM D, Test equipment Controls
This sampling method is not recommended for sampling soils containing coarse sand, gravel, or larger size soil particles, cemented, or very hard soils. See Appendix X1 for recommended techniques. In cases astmm the soil is very weak, it may be required to cut sections of the tube to remove soil cores for laboratory testing.