Work Item
ASTM WK74923

New Test Method for Determining Rock Shear Strength in a Borehole with a Borehole Shear Device

1. Scope

2.1 Scope The scope of the Committee shall be: The promotion of knowledge; stimulation of research; the development of specifications and methods for sampling and testing; and the development of terminology, definitions, and practices relating to the physical and chemical properties and behavior of soil, rock, and the fluids contained therein. Included are the physical and chemical properties and behavior of: soil-like materials and fluids occupying the pore spaces, fissures and other voids in soil and rock insofar as such fluids may influence the properties, behavior and uses of the soil and rock materials. Excluded are the uses of rock for building stone and for constituent materials in portland cement and bituminous paving and structures coming under the jurisdiction of other committees of the Society.

2.2 Interest Area The areas of interest of the Committee are soil, rock, powders, and such materials that may be intimately associated with soil and rock. . It will be the policy of this Committee to avoid, insofar as possible, dealing with methods of design of engineered structures and all those features of general practice in the use of soil and rock which may not involve the development of standards. It will, however, be considered within the scope of the Committee's work to promote by every desirable means the close cooperation of other organizations and committees whose field of endeavor is closely allied to that of the Committee.

Keywords

creep limit; in situ tests; limit pressure; modulus; stress-strain; in-situ testing; rock pressuremeter; dilatometer; deformation modulus; back analysis; in situ stress; hysteresis

Rationale

The test addresses the needed and advantages of rapidly obtaining data and the ability to test rocks that are too weak or fractured to sample by core or other methods. The test reduces bias in the results caused by testing only surviving sections of rock cores at the drill hole and possibly biased even more after transporting and sample preparation at the testing laboratory at some moisture content and stress level probably significantly different than in situ. It can be used to obtain shear strength data for coal and non-coal mine pillars, rock slope mass, socketed piers in rock, and underground openings for designs, quality assurance, and rapid measurements. Users of the data will be rock bolt engineers, rock foundation engineers, slope stability engineers, tunneling and underground mining engineers, and rock pier engineers.

The title and scope are in draft form and are under development within this ASTM Committee.

Details

Developed by Subcommittee: D18.12

Committee: D18

Staff Manager: Katerina Koperna

Work Item Status

Date Initiated: 11-23-2020

Technical Contact: Jack Touseull

Item: 000

Ballot:

Status: