Quantifid joint surface description and joint shear strength of small rock samples
Geotechnical structures in rock masses such as tunnels, underground caverns, dam foundations and rock slopes often have problems with a jointed rock mass. The shear behaviour of a jointed rock mass depends on the mechanical behaviour of the discontinuities in that particular rock mass. If we want...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Geological Survey of Slovenia
2018-07-01
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| Series: | Geologija |
| Subjects: | |
| Online Access: | http://www.geologija-revija.si/dokument.aspx?id=1329 |
| Summary: | Geotechnical structures in rock masses such as tunnels, underground caverns, dam foundations and rock
slopes often have problems with a jointed rock mass. The shear behaviour of a jointed rock mass depends on
the mechanical behaviour of the discontinuities in that particular rock mass. If we want to understand the
mechanical behaviour of a jointed rock mass, it is necessary to study the deformation and strength of a single
joint. One of the primary objectives of this work is to improve the understanding of the frictional behaviour of
rough rock joints under shear loads with regard to the roughness of the joint surface. The main problem is how
to measure and quantify the roughness of the surface joint and connect the morphological parameters into a
shear strength criterion. Until now, several criteria have been developed; however, all of them used large rock
samples (20×10×10 cm). It is often not possible to get large samples, especially when the rock is under a few meters
thick layer of soil. In this case, samples of rock can only be acquired with investigation borehole drilling, which
means that the samples of rock are small and of different shapes. The paper presents the modifid criterion that
is suitable for calculating the peak shear stress of small samples. |
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| ISSN: | 0016-7789 1854-620X |