Determination of roughness coefficient of rock mass structural face

Abstract

A method for measuring roughness coefficient of rock mass structure surface includes arranging multiple measurement sections at potential sliding direction on engineering rock mass structure surface uniformly, plotting profilogram for each of said sections and measuring fluctuation range Ryn of each profilogram, using formula of JRCn = 49.2114e 29Ln / 450Loarctan (8Ryn / Ln) late out roughness coefficient JRCn, counting up JRCn value to obtain expected value of JRCn being used as roughness coefficient of rack mass structure surface.

Description

(1) Technical field The invention relates to a directional statistical measurement method for the roughness coefficient of a rock mass structural surface, which is suitable for directly measuring the roughness coefficient JRC on the surface of a rock mass structural surface in the field n value occasions. (2) Background technology Before the present invention was made, there was no JRC for the surface roughness coefficient of the rock mass structural surface in the field. n The measurement method is suitable for indoor rock mass structural surface roughness coefficient measurement methods include direct shear test method, tilt test method, standard contour curve method, standard parameter method, etc. The direct shear test method and tilt test method can only obtain the sample size The essence of the JRC value is to use the JRC-JCS model to back-calculate the JRC value from the test results of the direct shear test or the tilt test; the standard contour curve method uses th...

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Problems solved by technology

These technical procedures are cumbersome, the calculation or estimation speed is slow, and the cost is high, so they are not suitable for field rock mass structural surface roughness coefficient JRC with anisotropy, anisotropy and heterogeneity. n Statistical measurement of

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