ASTM-D7702/D7702M 2021

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D7702/D7702M-14(2021) Standard Guide for Considerations When Evaluating Direct Shear Results Involving Geosynthetics

Published By	Publication Date	Number of Pages
ASTM	2021	11

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Categories: 59.080.70 - Geotextiles, ASTM

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Description

ASTM D7702/D7702M-14-Reapproved2021

Active Standard: Standard Guide for Considerations When Evaluating Direct Shear Results Involving Geosynthetics

ASTM D7702/D7702M

Scope

1.1 This guide presents a summary of available information related to the evaluation of direct shear test results involving geosynthetic materials.

1.2 This guide is intended to assist designers and users of geosynthetics. This guide is not intended to replace education or experience and should only be used in conjunction with professional judgment. This guide 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. Not all aspects of this practice may be applicable in all circumstances. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.

1.3 This guide is applicable to soil-geosynthetic and geosynthetic-geosynthetic direct shear test results, obtained using either Test Method D5321/D5321M or D6243/D6243M.

1.4 This guide does not address selection of peak or large-displacement shear strength values for design. References on this topic include Thiel (1),2 Gilbert (2), Koerner and Bowman (3), and Stark and Choi (4).

1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

1.6 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.

1.7 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.

Keywords

direct shear; GCL; interface shear strength; internal shear stress; Mohr-Coulomb friction angle; Mohr-Coulomb shear strength envelope; performance test; secant friction angle;

ICS Code

ICS Number Code 59.080.70 (Geotextiles)

DOI: 10.1520/D7702_D7702M-14R21

Additional information

Standard Title	D7702/D7702M-14(2021) Standard Guide for Considerations When Evaluating Direct Shear Results Involving Geosynthetics
Published Code	ASTM
Publication Date	2021
Pages Count	11
ICS Codes	59.080.70 - Geotextiles