Rapid scanning device and method for undulating features of joint surface based on laser ranging

Abstract

The invention discloses a rapid scanning device and method for undulating features of a joint surface based on laser ranging, and the device comprises an industrial computer, a master controller, a lateral driving device, a longitudinal driving device, a laser ranging module, a main body support component and a reference base, wherein the main body support component is arranged on the reference base and comprises a side bracket, left and right support plates and a slide provided on the side bracket; the slide is an auxiliary slide wheel dedicated slide for the end of the longitudinal driving device, and both the left support plate and right support plate are fixedly disposed on the same side of the side bracket. The invention can perform high-precision, highly intelligent and rapid undulating shape data collection on the joint surface in the range of 10cm*15cm, is simple in structure convenient to carry, and lower in requirements for the selection of the measurement areas, can realizethe collection of curve data of the characteristics of all directions within the control range, reduces the influence of human factors to the greatest extent and improves the quality and efficiency offield data collection.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics, and in particular relates to a fast scanning device and a scanning method for joint surface undulation shapes used in rock engineering for accurately evaluating joint surface characteristic parameters that affect rock mass stability. Background technique [0002] Joints are a very complex geological structure that widely exists in crustal rocks. Since the strength and stiffness of joints are much lower than that of intact rocks, the strength and stability of engineered rock mass mainly depend on the orientation and mechanical properties of joints. In the past few decades, people have done a lot of research on the mechanical behavior of joints, and obtained a lot of very valuable research results, but still can not meet the needs of engineering design. As we all know, joint roughness and joint surface morphology are important parameters affecting the mechanical behavior of joints, and many ...

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Problems solved by technology

Based on this, scholars at home and abroad have proposed a variety of acquisition equipment for joint roughness curves, including the surface profile recorder proposed by Hass et al., which can draw a horizontal joint surface profile curve with a length of 61 cm. The speed is fast, but the test piece requires that the processing must be installed in strict accordance with the proportion, thus limiting the operating speed and only suitable for indoor measurement; the contour ruler and model mold developed by Stimpson clamp 170 equal-length needles in a long clip to form a Plane and vertically placed on the jointed surface at the level of the reference plane, record the undulating contour of the upper end of the needle formed by undulating and rising freely along the jointed surface on the background drawing paper with spray paint or inkjet, so as to obtain the contour curve of the jointed surface. The measurement of this device The accuracy and length are limited by the diameter and number of needles, and only the outline of the horizontal joint surface can be drawn; the RSP-1 intelligent rock surface profiler proposed by Xia Caichu et al. combines four parts: machinery, control, testing and data processing. Integrate into one, while drawing the contour curve, obtain the characteristic parameters of the surface topography, the measurement accuracy is high, but this intelligent rock surface topography instrument is only suitable for the measurement of the joint roughness in the laboratory; the profile proposed by Du Shigui and other researchers The curve meter uses the ups and downs of the slider during the sliding process on the slide rail to continuously reflect the ups and downs of the joint roughness curve on the drawing board. The impact of human factors is more accidental

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