Tunnel over-break and under-break rapid detection device

Abstract

The utility model discloses a tunnel back break rapid detection device which comprises a dial, a bearing is arranged at the circle center of the dial in a limiting mode, an insertion rod is fixedly arranged on one side of the circle center of the dial, a laser range finder capable of rotating along the axis of the dial is arranged on the other side of the circle center of the dial, and the laser range finder is installed on a clamping plate assembly. The clamping plate assembly is connected with the bearing, and the end, connected with the bearing, of the clamping plate assembly is provided with a pointer matched with the dial to indicate the angle. According to the scheme, the inserting rod is inserted into the center of the tunnel section, the dial is parallel to the tunnel section, the laser range finder is used for sequentially detecting the distances of the dial at different deflection angles in the circumferential direction, and therefore a plurality of coordinate measuring points about the center of the tunnel section are obtained, and all the coordinate measuring points are subjected to linear segment fitting; the area of the back break detection section can be obtained; the device is small in structure, convenient to detect, low in manpower and material resource consumption and capable of reducing the detection cost, and the detection precision meets the requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel detection technical field, concretely relates to a tunnel overunderbreak rapid detection device. BACKGROUND

[0002] In the tunneling process, overunderbreak often occurs, overunderbreak is a special term in engineering, taking the design excavation contour line as the reference, the part of the actual excavation section outside the reference line is called overbreak, and the part inside the reference line is called underbreak; the main causes of overunderbreak include geological condition change, non-standard construction operation and measurement error, etc., resulting in deviation between actual excavation and design, overunderbreak has negative impact on engineering progress, quality, safety and cost, therefore, in order to avoid overunderbreak, it is necessary to detect overunderbreak of the tunnel.

[0003] At present, the conventional detection device is a total station or a three-dimensional laser scanner, when the total station is used for measurement, the detection steps are more tedious, and the detection time is long; and the three-dimensional laser scanner is expensive and has low popularization degree. UTILITY MODEL CONTENT

[0004] In view of the above shortcomings of the prior art, the utility model provides a tunnel overunderbreak rapid detection device, and solves the problems of high detection cost and long detection time of the tunnel overunderbreak.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0006] The utility model provides a tunnel overunderbreak rapid detection device, which comprises a scale disc, a bearing is arranged at the center of the scale disc, a plug rod is fixedly arranged on one side of the center of the scale disc, a laser range finder rotatable along the axis of the scale disc is arranged on the other side of the center of the scale disc, the laser range finder is installed on a clamping plate assembly, the clamping plate assembly is connected with the bearing, and a pointer for indicating the angle in cooperation with the scale disc is arranged on the connecting end of the clamping plate assembly and the bearing.

[0007] Further, the clamping plate assembly comprises an upper clamping plate and a lower clamping plate for fixing and clamping the laser range finder, the upper clamping plate and the lower clamping plate are connected through a plurality of bolts and fasten the laser range finder.

[0008] Further, one end of the lower clamping plate is provided with a vertical rib plate, the bearing is connected with the vertical rib plate, the pointer is fixedly arranged on one side of the vertical rib plate, and the pointer is located on the radial direction of the scale disc.

[0009] Further, one side of the pointer close to the scale disc is provided with a rubber strip, and the rubber strip is slidably attached to the scale disc.

[0010] Further, one side of the plug rod connected with the scale disc is provided with a handle, the handle extends along the radial direction of the scale disc and protrudes from the outer edge of the scale disc.

[0011] Further, the outer end of the holding rod is connected with the detection ring through a connecting rod, and the detection ring is coaxially arranged with the holding rod, and the center of the outer end of the holding rod is connected with one end of the measuring line, and the other end of the measuring line passes through the detection ring and is connected with the plumb line.

[0012] Further, the extension direction of the insertion rod is perpendicular to the plane where the scale disc is located, and the front end of the insertion rod is provided with a guide cone head.

[0013] The tunnel overbreak and underbreak rapid detection device has the advantages that:

[0014] 1. In use, the insertion rod is inserted into the center of the tunnel section, the scale disc is parallel to the tunnel section, the distance of the laser range finder at different deflection angles in the circumferential direction is detected in sequence, a plurality of coordinate measuring points about the center of the tunnel section are obtained, and all the coordinate measuring points are linear segment fitted, so that the area of the overbreak and underbreak detection section is obtained; the device has small structure, convenient detection, meets the requirement of detection accuracy, and consumes small manpower and material resources, so that the detection cost is reduced.

[0015] 2. The sliding friction between the rubber strip and the scale disc is utilized to realize automatic fixing of the laser range finder after being deflected to any angle, so as to release the hands of the measurer and record the measurement data.

[0016] 3. The verticality of the holding rod and the scale disc is obtained by observing the position of the measuring line in the detection ring, in use, the measuring line is located at the center of the detection ring through position adjustment, so that the scale disc can be kept in the vertical state, and the detection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the tunnel overbreak and underbreak rapid detection device.

[0018] Figure 2 It is a side view of the tunnel overbreak and underbreak rapid detection device.

[0019] Figure 3 It is a top view of the tunnel overbreak and underbreak rapid detection device.

[0020] Figure 4 It is a reasonable measuring point arrangement schematic view of the single-line tunnel overbreak and underbreak rapid detection device.

[0021] Wherein, 1, scale disc, 2, insertion rod, 3, laser range finder, 4, pointer, 5, upper clamping plate, 6, lower clamping plate, 7, bolt, 8, vertical rib plate, 9, holding rod, 10, connecting rod, 11, detection ring, 12, measuring line, 13, plumb line, 14, guide cone head. DETAILED DESCRIPTION

[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0023] like Figures 1 to 3 As shown, the tunnel over-excavation and under-excavation rapid detection device of this scheme includes a dial 1, a bearing is provided at the center of the dial 1 for limiting, and an insertion rod 2 is fixedly provided on one side of the center of the dial 1. The extension direction of the insertion rod 2 is perpendicular to the plane of the dial 1. A guide cone 14 is provided at the front end of the insertion rod 2 so as to facilitate the insertion rod 2 to be inserted into the center hole of the tunnel section. A laser rangefinder 3 is provided on the other side of the center of the dial 1. The laser rangefinder 3 can rotate along the axis of the dial 1. The laser rangefinder 3 is mounted on a clamping plate assembly. The clamping plate assembly is connected to the bearing, and a pointer 4 is provided on the connection end of the clamping plate assembly and the bearing to cooperate with the dial 1 to indicate the angle.

[0024] This scheme can use straight line segments to fit the over-excavation and under-excavation detection section of the tunnel. In specific implementation, the insertion rod 2 is inserted into the center of the tunnel section, so that the scale 1 is parallel to the tunnel section. The laser rangefinder 3 is used to detect the distance at different deflection angles in the circumferential direction in turn, so as to obtain several coordinate measuring points about the center of the tunnel section. By fitting all the coordinate measuring points with straight line segments, the area of ​​the over-excavation and under-excavation detection section can be obtained.

[0025] As an optional implementation, the clamping assembly includes an upper clamping plate 5 and a lower clamping plate 6 for fixing and holding the laser rangefinder 3. The upper clamping plate 5 and the lower clamping plate 6 are connected and fastened to the laser rangefinder 3 by several bolts 7. A vertical rib plate 8 is provided at one end of the lower clamping plate 6, and a bearing is connected to the vertical rib plate 8. The pointer 4 is fixedly set on one side of the vertical rib plate 8, and the pointer 4 is located in the radial direction of the scale 1. A rubber strip is provided on the side of the pointer 4 near the scale 1. The rubber strip slides against the scale 1, and the sliding friction between the rubber strip and the scale 1 is used to realize the automatic fixing of the laser rangefinder 3 after it is deflected to any angle, so as to free the measurer's hands and record the measurement data.

[0026] As an optional implementation, a handle 9 is provided on one side of the connection between the insertion rod 2 and the dial 1. The handle 9 extends radially along the dial 1 and protrudes beyond the outer edge of the dial 1. The outer end of the handle 9 is connected to the detection ring 11 via the connecting rod 10, and the detection ring 11 and the handle 9 are coaxially arranged. The center of the outer end of the handle 9 is connected to one end of the test line 12, and the other end of the test line 12 passes through the detection ring 11 and is connected to the plumb bob 13. In specific implementation, by adjusting the position so that the test line 12 is located at the center of the detection ring 11, the dial 1 can be kept vertical, thereby improving the accuracy of the detection.

[0027] The following is an example illustrating the specific working process of this plan:

[0028] The recommended number of rapid detection points for over-excavation and under-excavation in actual engineering projects is shown in the table below:

[0029]

[0030] When conducting rapid detection of over-excavation and under-excavation, a straight line segment is used to fit the detection section. Eleven points must be measured, and the specific layout of these points is shown in the diagram below. Figure 4 As shown, the specific example steps are as follows:

[0031] S1: First, find the center of the tunnel cross section. The center point O of the tunnel cross section is determined by the on-site technicians by setting out the line, or the position of the center point O of the tunnel cross section is determined by taking H=4.67m upward from the track surface elevation (tunnel centerline).

[0032] S2: Insert the rod 2 to the center point O of the tunnel cross section and keep the dial 1 vertical;

[0033] S3: Rotate the laser rangefinder 3 and make the pointer 4 point at 42°32′ vertically to the scale 1, then turn on the laser rangefinder 3 to measure the length in this direction and record it as the length of OD1;

[0034] S4: Following the polar coordinate measurement method, the coordinates of 11 measuring points are measured sequentially from D1→D2→…→D11. In particular, when there is obvious over-excavation or under-excavation at a certain point in the tunnel cross section, a measuring point should be added at this point to measure its distance from point O and the angle between adjacent measuring points, thereby obtaining its coordinates.

[0035] S5: Fit the coordinates of all measuring points to a straight line segment in the computer, and the area of ​​the fitted graph is the area of ​​the over-excavation and under-excavation detection section.

Claims

1. A rapid detection device for tunnel over-excavation and under-excavation, characterized in that, The device includes a dial, with a bearing positioned at the center of the dial. A rod is fixedly mounted on one side of the center of the dial, and a laser rangefinder that can rotate along the axis of the dial is mounted on the other side of the center of the dial. The laser rangefinder is mounted on a clamping plate assembly, which is connected to the bearing. A pointer that cooperates with the dial to indicate angles is mounted on the connection end between the clamping plate assembly and the bearing.

2. The rapid detection device for tunnel over-excavation and under-excavation according to claim 1, characterized in that, The clamping plate assembly includes an upper clamping plate and a lower clamping plate for fixing and holding the laser rangefinder. The upper clamping plate and the lower clamping plate are connected and fastened to the laser rangefinder by a number of bolts.

3. The rapid detection device for tunnel over-excavation and under-excavation according to claim 2, characterized in that, One end of the lower clamping plate is provided with a vertical rib plate, the bearing is connected to the vertical rib plate, the pointer is fixedly set on one side of the vertical rib plate, and the pointer is located in the radial direction of the dial.

4. The rapid detection device for tunnel over-excavation and under-excavation according to claim 3, characterized in that, A rubber strip is provided on the side of the pointer near the dial, and the rubber strip slides in contact with the dial.

5. The rapid detection device for tunnel over-excavation and under-excavation according to claim 1, characterized in that, A grip is provided on one side of the connection between the insertion rod and the dial, and the grip extends radially along the dial and protrudes from the outer edge of the dial.

6. The rapid detection device for tunnel over-excavation and under-excavation according to claim 5, characterized in that, The outer end of the grip is connected to the detection ring via a connecting rod, and the detection ring is coaxial with the grip. The center of the outer end of the grip is connected to one end of the test line, and the other end of the test line passes through the detection ring and is connected to the plumb bob.

7. The rapid detection device for tunnel over-excavation and under-excavation according to claim 1, characterized in that, The extension direction of the insertion rod is perpendicular to the plane where the dial is located, and the front end of the insertion rod is provided with a guide cone.

Images