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Assessing the Shear Strength of Rock Discontinuities at Laboratory and Field Scales

Hencher, S.R. / Richards, L.R.

This paper sets out an approach to assessing shear strength of rock joints at project scale based on measurement and analysis rather than empiricism. The role of direct shear testing in this process is discussed in detail and the need for dilation measurement and correction emphasised. Dilation-corrected basic friction angles are presented for various rock types. The characterisation of first and second order roughness features and their contribution to shear strength at project scale are discussed with reference to possible scale effects. The paper is illustrated by a case example of a spillway slope for a dam in the Himalayas.

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Assessing the Shear Strength of Rock Discontinuities at Laboratory and Field Scales

Hencher, S.R. / Richards, L.R.

This paper sets out an approach to assessing shear strength of rock joints at project scale based on measurement and analysis rather than empiricism. The role of direct shear testing in this process is discussed in detail and the need for dilation measurement and correction emphasised. Dilation-corrected basic friction angles are presented for various rock types. The characterisation of first and second order roughness features and their contribution to shear strength at project scale are discussed with reference to possible scale effects. The paper is illustrated by a case example of a spillway slope for a dam in the Himalayas.

Assessing the Shear Strength of Rock Discontinuities at Laboratory and Field Scales

Hencher, S.R. / Richards, L.R.

This paper sets out an approach to assessing shear strength of rock joints at project scale based on measurement and analysis rather than empiricism. The role of direct shear testing in this process is discussed in detail and the need for dilation measurement and correction emphasised. Dilation-corrected basic friction angles are presented for various rock types. The characterisation of first and second order roughness features and their contribution to shear strength at project scale are discussed with reference to possible scale effects. The paper is illustrated by a case example of a spillway slope for a dam in the Himalayas.

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Title:

Assessing the Shear Strength of Rock Discontinuities at Laboratory and Field Scales

Contributors:

Hencher, S.R. (author) / Richards, L.R. (author)

Published in:

Rock Mechanics and Rock Engineering ; 48 ; 883-905

Publication date:

2015

Size:

23 Seiten

ISSN:

DOI:

https://doi.org/10.1007/s00603-014-0633-6

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Scherfestigkeit , Laborversuch , Rauigkeit , Dilatation , direkter Schertest , Labormaßstab , Staudamm , Abflusskanal , Gefälle , Gestein

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