Novel rock mass fracture roughness measuring device

Abstract

The invention relates to an engineering scale rock mass structural surface crack roughness coefficient measuring device, and belongs to the technical field of rock soil measurement. The device comprises a main box body, a measuring vertical ruler and a movable handle, a semicircular and rectangular combined hole and centimeter scales are formed in a front plate of the main box body so that horizontal coordinates of a crack curve can be read conveniently, a rectangular hole is formed in the top of the main box body, and the measuring vertical ruler is perpendicular to an opening in the top of the main box body. Scales are arranged on the left side and the right side of the measuring vertical ruler so that vertical coordinates of a crack curve can be read conveniently, the movable handle is perpendicular to an opening of a front plate of the main box body, and the measuring vertical ruler is connected with the movable handle through a connecting piece in the main box body. The method has the advantages of high measurement speed, convenience in statistics, light instrument, low cost and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of rock and soil measurement, and in particular relates to a novel rock mass crack roughness measuring device. Background Art

[0002] As the main component of rock mass, the distribution and interlacing of structural surface in the internal space of rock mass divides rock mass into blocks of different shapes and sizes, destroying the integrity and continuity of rock mass, significantly reducing the mechanical properties of rock mass, weakening the stability of engineering rock mass, and leading to the direct connection between the instability of engineering rock mass and the destruction of structural surface. Studies have shown that the roughness of rock mass structural surface plays a key role in the shear strength of rock mass structural surface. Therefore, only by fully understanding the influence mechanism of roughness on the mechanical properties of structural surface and objectively evaluating it quantitatively can we better grasp the mechanical properties of structural surface and provide reliable guidance for engineering practice.

[0003] At present, traditional measuring devices have the problems of being unable to measure crack curve data at equal intervals and having a short measuring range. Summary of the invention

[0004] Aiming at the shortcomings of the conventional roughness measuring device, the present invention discloses a novel rock mass crack roughness measuring device. The present invention achieves the purpose of accurately recording crack curve data by setting a series of combined openings and increasing the size of the measuring box.

[0005] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0006] A novel rock mass fracture roughness measuring device comprises the following steps:

[0007] The rock mass fissure roughness measuring device provided by the invention consists of a measuring ruler, a main box body and a moving handle.

[0008] A combined opening is reserved on the front of the main box body and a rectangular opening is reserved on the top. The combined opening is a combination of a semicircle and a rectangle. The combined opening and the rectangular opening are used for the connector to move inside the box body.

[0009] The upper part of the reserved combined opening of the main box is provided with a centimeter scale with a range of 100 cm and marked every 5 cm.

[0010] The connecting piece is used to connect the measuring ruler and the moving handle through the main box body.

[0011] The measuring ruler has millimeter scales on both sides, and the measuring range is 20 cm.

[0012] The connecting piece is composed of a rectangular block and a rectangular and semicircular combined block.

[0013] The connecting piece is used to vertically and fixedly connect the measuring ruler and the moving handle.

[0014] The semicircular blocks in the combined blocks of the connector are consistent in size with the semicircular openings in the combined openings. The rectangular blocks in the combined blocks are 4 mm shorter in height than the rectangular openings in the combined openings.

[0015] The movable handle is an elliptical block and is closely connected to the front side of the main box body and the connecting piece.

[0016] The function of the crack roughness measuring device provided by the present invention is to increase the measuring range and record the crack curve at equal intervals. The main principle is as follows: the length of the measuring crack is increased by increasing the size of the box, and the measuring distance is controlled each time by setting a combination of openings with a fixed distance.

[0017] This rock mass fracture roughness measuring device solves the problems of short measuring range and inability to measure at fixed distances in traditional measuring devices. It has the advantages of fast measuring speed, convenient statistics, light instrument and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols are used to represent the same components. In the accompanying drawings:

[0019] Figure 1 A three-dimensional schematic diagram of the overall structure of a novel rock mass fracture roughness measuring device provided by the present invention.

[0020] Figure 2 A front view of a novel rock mass fracture roughness measuring device provided by the present invention.

[0021] Figure 3 A top view of the novel rock mass fracture roughness measuring device provided by the present invention.

[0022] Figure 4 This is a left view of the novel rock mass fracture roughness measuring device provided by the present invention.

[0023] Figure 5 This is the 100 cm long crack curve and maximum fluctuation height of the rock mass measured by the present invention.

[0024] 1-main box, 2-measuring ruler, 3-moving handle, 4-rectangular through hole, 5-combination through hole, 6-front plate scale, 7-connector DETAILED DESCRIPTION

[0025] In order to facilitate those skilled in the art to understand and implement the present invention, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention, and all technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0026] In order to solve the problems existing in the prior art, the invention provides a device capable of measuring the roughness of rock mass cracks.

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the rock fracture roughness measuring device proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and embodiments.

[0028] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B. Specifically, it is understood that: A and B may be included at the same time, A may exist alone, or B may exist alone, and any of the above three situations may be met.

[0029] In the following description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example:

[0031] Reference Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 A novel rock mass fracture roughness measuring device is shown, which is composed of a main box 1, a measuring ruler 2 and a movable handle 3. The main box includes a top rectangular opening 4, a combined opening 5, a front plate scale 6 and a connecting piece 7. The front plate scale 6 has a measuring range of 100 cm. Both sides of the measuring ruler 2 are provided with millimeter scales, and the measuring range is 20 cm. The movable handle 3 is elliptical and is located on the front plate of the main box 1. The connecting piece 7 connects the measuring ruler 2 and the movable handle vertically through the combined opening 5 and the rectangular opening 4.

[0032] The implementation process of the present invention is as follows: first, the measuring ruler 2 is returned to the leftmost 0 scale by moving the handle 3. Then, the back plate of the main box is close to the rock surface of the fracture to be measured and parallel to the center axis of the fracture curve. Then, the scale 0 on the left side of the main box is aligned with the fracture measurement starting point. Next, the handle 3 is moved to the right with the measuring ruler 2. Each time it is moved, the measuring ruler reads and records the data. After repeating the operation 100 times, the measurement of this section of the fracture is terminated and the measurement end point is marked as the starting point of the next section of the measurement. Then, the above operation is repeated according to the marked measurement starting point to continue measuring the remaining part of the fracture. (Refer to the attached Figure 5 ) Then mark the recorded crack data coordinate points in AutoCAD software and connect these data points with smooth curves. Finally, measure the maximum crack undulation A and the horizontal length L of the crack in AutoCAD, and then use the mathematical expression of the modified straight edge method to calculate the structural surface roughness coefficient (JRC); the mathematical expression of the modified straight edge method to calculate the structural surface roughness coefficient (JRC) is as follows:

[0033]

[0034] Where: A-maximum crack fluctuation, mm;

[0035] L- horizontal length of crack, cm.

[0036] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A new rock mass fracture roughness measuring device, characterized in that: Including the main box, measuring ruler and moving handle: A combined opening is reserved on the front of the main box body and a rectangular opening is reserved on the top. The combined opening is a combination of a semicircle and a rectangle. The combined opening and the rectangular opening are used for the connector to move inside the box body. The upper part of the reserved combined opening of the main box is provided with a centimeter scale with a range of 100 cm and marked every 5 cm. The connecting piece is used to connect the measuring ruler and the moving handle through the main box body. The measuring ruler has millimeter scales on both sides, and the measuring range is 20 cm.

2. A new rock mass fracture roughness measuring device according to claim 1, characterized in that: The connecting piece is composed of a rectangular block and a rectangular and semicircular combined block. The connecting piece is used to vertically and fixedly connect the measuring ruler and the moving handle. The semicircular blocks in the combined blocks of the connecting piece are consistent in size with the semicircular openings in the combined openings. The rectangular block in the combined block is 4 mm shorter than the rectangular opening in the combined opening.

3. The new rock mass fracture roughness measuring device according to claim 1 is characterized in that: The movable handle is an elliptical block and is closely connected to the front side of the main box body and the connecting piece.

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