ASTM D1587 PDF
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.
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Unconsolidated undrained tests are more reliable but can still suffer from disturbance problems. Continue shopping Proceed to checkout.
The research shows that loose sands are densified and dense sands are loosened during tube insertion because the penetration process is drained, allowing grain rearrangement. For information on appropriate use of other soil samplers refer to Practice D It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Softer formations may require sharper cutting angles of 5 to 10 degrees, however, sharp angles may be easily damaged in deeper borings.
This document cannot replace education or experience and should be used in conjunction with professional judgment.
ASTM D – 00 Standard Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes
Other soil samplers may be used for sampling these soil types. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.
The double-tube samplers are thicker walled and require special considerations for an outside cutting shoe and not the inner thin-walled liner tube. These samplers use high C r tubes of 1. Unconfined compression tests should be only used with caution or based on experience because they often provide unreliable measure of undrained strength, especially in fissured clays. Such samplers include driven split barrel samplers and soil coring devices Test Methods DDand Practice D Note This practice does not apply to liners used within the samplers.
A piston sampler Practice D must be used to ensure that there is no fluid or sidewall contamination that would enter an open sampling tube. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Disturbance and sample quality can be evaluated by looking at recompression strains in the One-Dimensional Consolidation test see Andressen and Kolstad 5.
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Very stiff clays 4 generally require use of rotary soil core axtm Practice DGuide D The most commonly used tube is the 3-in. For more information on preservation and transportation process of soil samples, consult Practice D The push equipment should provide a smooth continuous vertical push.
If tubes are for re-use, soil axtm must be extruded quickly within a few days since damage to any inside coatings is inevitable in multiple re-use. Low-plasticity silts can be sampled but in some cases below the water table they may not be held in the tube and a piston sampler may be required to recover these soils.
Users of this practice are cautioned that compliance with Practice D does not in itself ensure reliable results. Are you sure you want to unsubscribe monitoring? For determination of undrained strength, unconfined compression or unconsolided, undrained triaxial compression tests are often used Test Methods D and D Consolidation test specimens are generally larger diameter than those for asrm testing and larger diameter soil cores may be required.
Any drilling method that ensures the base of the borehole is intact and that the borehole walls are stable may be used. The one to two week period is just guideline typically used in practice. This sampling method is not recommended for sampling soils containing coarse sand, gravel, or larger size soil particles, cemented, or very hard soils. The recommended combinations of A rcutting angle, and C r are given below also see 6.
Use in very stiff and hard clays with insertion by driving or hammering cannot provide an intact sample. Gravelly soils cannot be sampled and gravel will damage the thin-walled tubes. Subsurface geotechnical explorations should be reported in accordance with Practice D Soft clays require C r of 0 or less than 0. Combining values from the two systems may result in non-conformance with the standard.
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It is common practice to extrude or remove the soil core either in the field or at the receiving laboratory immediately upon receipt. The sample depth of the sampler should coincide with the drilled depth. However, the piston samplers are designed to recover soft soils and low-plasticity soils and the thin-walled tubes used must be of lower C r of 0. Axtm tubes used in piston, plug, or rotary-type samplers should comply with Section 6.
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For information on appropriate use of other soil samplers refer to Practice D For information on appropriate use of other soil samplers astn to D This sampling method is not recommended for sampling soils containing gravel or larger size soil particles cemented or very hard soils. Username or password invalid.
Typical sizes of thin-walled tubes are shown on Table 1. For softer or harder soils C r tubes may require special order from the supplier. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. It was not possible to unsubscribe – please try again later or contact the Danish Standard Please make sure you are logged in.
Do not show this again. Extruded cores can be preserved by encasing the cores in plastic wrap, tin foil, and then microcrystalline wax to preserve moisture. Cutting edge angles of up to 20 to 30 degrees have been used in stiffer formations in order to avoid damage to the cutting edges.