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ASTM D3213-19
Standard Practices for Handling, Storing, and Preparing Soft Intact Marine Soil
Přeložit název
NORMA vydána dne 1.2.2019
Informace o normě:
Označení normy: ASTM D3213-19
Datum vydání normy: 1.2.2019
Kód zboží: NS-936792
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D3213-19 :
Keywords:
laboratory fine-grained soils, marine, soft, storage, intact samples,, ICS Number Code 07.060 (Geology. Meteorology. Hydrology)
Doplňující informace
| Significance and Use | ||||||||||||||||||
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5.1 Disturbance imparted to sediments after sampling can significantly affect some geotechnical properties. Careful practices need to be followed to minimize soil fabric changes caused from handling, transporting, storing, and preparing sediment specimens for testing. Note 1: 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. Agencies that
meet the criteria of Practice D3740 are generally considered capable of
competent and objective testing/sampling/inspection, etc. Users of
this standard are cautioned that compliance with Practice
D3740 does not in itself
assure reliable results. Reliable results depend on may factors;
Practice D3740 provides a
means of evaluating some of those factors.
5.2 The practices presented in this document should be used with soil that has a very soft or soft shear strength (undrained shear strength less than 25 kPa (3.6 psi)) consistency. Note 2: Some soils that are obtained at or just below the
seafloor quickly deform under their own weight if left unsupported.
This type of behavior presents special problems for some types of
testing. Special handling and preparation procedures are required
under those circumstances. Tests, such as the handheld vane
(D4648/D4648M) or miniature
vane (D8121/D8121M), are
sometimes performed at sea to minimize the effect of storage time
and handling on soil properties. An undrained shear strength of
less than 25 kPa was selected based on Terzaghi and
Peck.5.3 These practices shall apply to
specimens of naturally formed marine soil (that may or may not be
fragile or highly sensitive) that will be used for density
determination, consolidation, permeability testing or shear
strength testing with or without stress-strain properties and
volume change measurements (see Note
3). In addition, dynamic and cyclic testing can also be
performed on the sample.
Note 3: To help evaluate disturbance, X-Ray Radiography has
proven helpful, refer to Practice D4452.
5.4 These practices apply to fine-grained soils that do not allow the rapid drainage of pore water. Although many of the procedures can apply to coarser-grained soils, drainage may occur rapidly enough to warrant special handling procedures not covered in these practices. 5.5 These practices apply primarily to soil specimens that are obtained in thin-walled or similar coring devices that produce high-quality cores or that are obtained by pushing a thin-walled tube into cores taken with another sampling device. 5.6 These practices can be used in conjunction with soils containing gas, however, more specialized procedures and equipment that are not covered in these practices have been developed for use with such materials. Note 4: For information on handling gas charged sediments, the
reader is referred to papers by Johns, et al.,4
and Lee.1.1 These practices cover methods for
project/cruise reporting, and handling, transporting and storing
soft cohesive intact marine soil. Procedures for preparing soil
specimens for triaxial strength, and consolidation testing are also
presented.
1.2 These practices may include the handling and transporting of sediment specimens contaminated with hazardous materials and samples subject to quarantine regulations. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard. 1.4 These practices offer a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of these practices may be applicable in all circumstances. This ASTM standard is not intended to 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 project’s many unique aspects. The word “Standard” in the title means only that the document has been approved through the ASTM consensus process. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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