Tunnel section measuring device

Abstract

The utility model relates to the technical field of tunnel excavation measurement, in particular to a tunnel section measuring device. A tunnel section measuring device comprises a vertical rod and a laser range finder rotationally arranged on the vertical rod, the light emitting direction of the laser range finder is perpendicular to the axis direction of the vertical rod, and the vertical rod is further fixedly connected with a rotating disc. The side, close to the laser range finder, of the rotating disc is provided with scales used for displaying the rotating angle of the laser range finder, and one end of the vertical rod is further provided with a supporting assembly used for supporting the vertical rod. The device has the advantages that the distances of different key point positions on the tunnel section are measured by rotating the laser range finder, the scales on the turntable provide reference for an operator to rotate the laser range finder, measurement data are recorded synchronously, data with large errors are judged to be over-excavation or under-excavation, then rough measurement of the over-excavation or under-excavation of the tunnel section is achieved, and the measurement accuracy of the tunnel section is improved. And the end face of a construction tunnel with a large hole diameter can be measured conveniently.

Description

Technical Field

[0001] This application relates to the technical field of tunnel excavation measurement, and in particular to a tunnel cross-section measuring device. Background Technology

[0002] Tunnel construction is of vital importance to infrastructure development. For example, tunnels are widely used in water conservancy projects and transportation projects. Accurate tunnel excavation surveying can ensure project quality, improve project efficiency, and avoid various safety hazards and economic losses caused by improper excavation.

[0003] In tunnel construction, over-excavation refers to the situation where the actual excavated cross-section exceeds the designed cross-section, while under-excavation is the opposite, referring to the actual excavation falling short of the design requirements. As the scale of projects continues to expand and the requirements for project quality increase, tunnel excavation measurement technology is also constantly developing and improving to meet more complex and high-precision measurement needs.

[0004] A typical method for judging over-excavation or under-excavation in hydraulic tunnel construction is the cross-section measurement method. It is often used in scenarios where the measurement accuracy requirements are not high, such as quick inspections during daily construction or key cross-section detection during the acceptance phase. The specific process is that after the excavation cross-section is opened, construction or supervision personnel conduct rough measurements using measuring tools such as steel tape measures, based on visual inspection. They measure the distances from key points of the tunnel cross-section, such as the arch, sidewalls, and tunnel centerline, and then compare them with the design cross-section drawings. This allows them to determine the approximate over-excavation or under-excavation situation and the basis for such determination, so as to guide the next step of construction.

[0005] However, when the diameter of the tunnel under construction is large, it is not convenient to reach the test points with higher cross sections. Using conventional measuring tools such as steel tape measures will be relatively troublesome. Even if the accuracy requirement of the measurement is not high, the difficulty of operation can easily lead to excessively large errors, which cannot meet the requirements of actual operation. Utility Model Content

[0006] To facilitate end-face measurement of construction tunnels with large diameters, this application provides a tunnel cross-section measurement device.

[0007] This application provides a tunnel cross-section measuring device, which adopts the following technical solution: it includes a pole and a laser rangefinder rotatably mounted on the pole. The light emission direction of the laser rangefinder is perpendicular to the axial direction of the pole. A turntable is also fixedly connected to the pole. The turntable has a scale for displaying the rotation angle of the laser rangefinder on the side near the laser rangefinder. A support assembly for supporting the pole is also provided at one end of the pole.

[0008] By adopting the above technical solution, a laser rangefinder is used instead of a steel tape measure to measure the cross-sectional dimensions of tunnels. When facing tunnels with large diameters, the distance to the point to be measured can be measured relatively quickly. In actual operation, the operator places the pole near the centerline of the tunnel cross-section and rotates the laser rangefinder to measure the distance to different key points on the tunnel cross-section. The scale on the turntable provides a reference for the operator to rotate the laser rangefinder, making it easy to determine whether the rotation angle is correct for measuring the required point. Measurement data is recorded simultaneously during the measurement process. After the distances to the points on the cross-section are measured, the data is compared with the cross-section design drawing. For design drawings with different calculation methods, the measurement data can be easily converted. Data with large errors can be judged as over-excavation or under-excavation, thus achieving a rough measurement of over-excavation or under-excavation of the tunnel cross-section. Furthermore, the support components stabilize the pole during the measurement process, eliminating the need for the operator to hold and fix the pole, making it easier to rotate the laser rangefinder or record data, further improving the convenience of operation.

[0009] Preferably, a rotating shaft perpendicular to the upright is rotatably connected to the upright, one end of the rotating shaft passes through the turntable and is provided with a clamping assembly, and the laser rangefinder is connected to the upright through the clamping assembly;

[0010] The clamping assembly includes a clamping part and a connecting part connected to the rotating shaft at one end. The connecting part is connected to an abutment part at the end away from the rotating shaft. The clamping part is slidably disposed on the abutment part. The laser rangefinder is located between the abutment part and the connecting part and abuts against the abutment part. The abutment part is provided with a tension spring for driving the clamping part to move toward the connecting part.

[0011] By adopting the above technical solution, on the one hand, the clamping component facilitates the assembly and disassembly of the finished laser rangefinder on the pole; on the other hand, the dimensions of the connecting part and the abutment part are designed according to the size specifications of the laser rangefinder. When the laser rangefinder is placed between the connecting part and the clamping part, the laser emission direction of the laser rangefinder is perpendicular to the axis of the rotating shaft while the laser rangefinder abuts against the abutment part. This ensures that the angle on the reference turntable remains effective when the laser rangefinder is rotated, thus improving the practicality of the structure.

[0012] Preferably, a pointer is provided on the side of the turntable close to the laser rangefinder. The pointer is located between the turntable and the laser rangefinder and rotates synchronously with the laser rangefinder. The length direction of the pointer is parallel to the measurement direction of the laser rangefinder.

[0013] By adopting the above technical solution, when the laser rangefinder rotates, the pointer will rotate along with it, thus accurately pointing to the scale on the turntable, making it convenient to read the measured angle.

[0014] Preferably, a knob is provided on the end of the rotating shaft away from the clamping assembly.

[0015] By adopting the above technical solution, rotating the knob can drive the rotating shaft to rotate, thereby driving the laser rangefinder and pointer to rotate synchronously.

[0016] Preferably, the upright is a telescopic pole.

[0017] By adopting the above technical solution, the height of the pole can be adjusted to adapt to different tunnel environments, without being overly restricted by the tunnel environment. It can efficiently and accurately measure the tunnel cross-section, greatly improving measurement efficiency, reducing labor intensity and measurement costs, and is suitable for various complex tunnel conditions.

[0018] Preferably, the upright includes an outer rod and an inner rod slidably embedded in the outer rod, and the outer rod is threadedly connected to a clamping member for abutting the inner rod.

[0019] By adopting the above technical solution, after adjusting the extension length of the inner rod, the clamping part can be pressed against the inner rod to fix the inner rod, thereby adjusting the overall height of the upright to meet the tunnel measurement needs of different heights.

[0020] Preferably, the support assembly includes a connecting column and three legs. One end of the connecting column is detachably connected to the upright, and the other end of the connecting column is connected to the three legs. The three legs are evenly spaced on the connecting column along its circumference.

[0021] By adopting the above technical solution, the connecting column serves to connect the upright and the legs. One end of the column is detachably connected to the upright, which facilitates the assembly and disassembly of the device and makes it easy to carry and transport. The three legs are evenly spaced on the connecting column along the circumference of the connecting column, forming a stable triangular support structure, which enhances the stability of the entire device and can adapt to uneven tunnel bottoms.

[0022] Preferably, a slot for inserting the outer rod is provided on one end face of the connecting post, a positioning element is provided on the outer wall of the end of the outer rod away from the inner rod, and a positioning hole is provided on the connecting post for the positioning element to be embedded, the positioning hole penetrating the slot wall radially along the connecting post.

[0023] By adopting the above technical solution, this connection method is relatively convenient for both installation and disassembly.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The distance between different key points on the tunnel cross-section is measured by rotating the laser rangefinder. The scale on the turntable provides a reference for the operator to rotate the laser rangefinder and records the measurement data simultaneously. Data with large errors are judged as over-excavation or under-excavation, thus realizing the coarse measurement of over-excavation or under-excavation of the tunnel cross-section, which is convenient for end face measurement of construction tunnels with large diameters.

[0026] 2. The clamping components facilitate the assembly and disassembly of the finished laser rangefinder on the pole;

[0027] 3. When the laser rangefinder rotates, the pointer will rotate along with it, thus accurately pointing to the scale on the dial, making it easy to read the measured angle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this application;

[0029] Figure 2 This is a schematic diagram of the overall structure from another perspective of this application;

[0030] Figure 3 This is a cross-sectional schematic diagram of the overall structure of this application;

[0031] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0032] Figure 5 yes Figure 3 A magnified view of part B in the diagram.

[0033] Explanation of reference numerals in the attached drawings: 110, support assembly; 111, connecting column; 112, support leg; 113, slot; 114, positioning element; 115, positioning protrusion; 116, connecting spring; 117, positioning hole; 118, positioning groove; 120, upright; 121, outer rod; 122, inner rod; 123, clamping element; 130, turntable; 131, scale; 132, rotating shaft; 133, pointer; 134, knob; 140, laser rangefinder; 150, clamping assembly; 151, clamping part; 152, connecting part; 153, abutting part; 154, tension spring. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] This application discloses a tunnel cross-section measuring device, which is used to facilitate end-face measurement of construction tunnels with large diameters.

[0036] refer to Figures 1-3A tunnel cross-section measuring device includes a pole 120 and a laser rangefinder 140. The laser rangefinder 140 is rotatably mounted on the pole 120, and the direction of the laser beam emitted by the laser rangefinder 140 is perpendicular to the axis of the pole 120. A turntable 130 is also fixedly connected to the pole 120. The turntable 130 has a scale 131 on the side near the laser rangefinder 140 for displaying the rotation angle of the laser rangefinder 140. A support assembly 110 for supporting the pole 120 is also provided at one end. The laser rangefinder 140 replaces the steel tape measure to measure the cross-section dimensions of the tunnel. The rotation of the laser rangefinder 140, combined with the angle displayed by the scale 131, can accurately obtain the distance to the inner wall of the tunnel at different angles. When facing a tunnel with a large diameter, it can conveniently and quickly measure the distance to the point to be measured, improving measurement efficiency.

[0037] In actual operation, the operator places the pole 120 on the centerline of the tunnel near the section to be measured. By rotating the laser rangefinder 140, the distances to different key points on the tunnel section can be measured. The scale 131 on the turntable 130 provides a reference for the operator to rotate the laser rangefinder 140, making it easy to determine whether the rotation angle allows the laser rangefinder 140 to measure the required points. During the measurement process, the measurement data is recorded simultaneously. After the distance measurement of the points on the section is completed, it is compared with the section design drawing. For design drawings with different calculation methods, the measurement data can be simply converted. Data with large errors can then be judged as over-excavation or under-excavation, thus achieving a rough measurement of over-excavation or under-excavation of the tunnel section. Furthermore, during the measurement process, the support component 110 can stabilize the pole 120, eliminating the need for the operator to hold and fix the pole 120, facilitating the rotation of the laser rangefinder 140 and data recording, further improving the convenience of operation.

[0038] Specifically, the upright 120 serves as the main support for the entire device. The upright 120 is cylindrical in shape. In this embodiment, the upright 120 is configured as a telescopic rod. The upright 120 includes an outer rod 121 and an inner rod 122 that is slidably embedded in the outer rod 121. The inner diameter of the outer rod 121 is slightly larger than the outer diameter of the inner rod 122 to ensure that the inner rod 122 can slide smoothly within the outer rod 121. A bolt is threaded onto the outer rod 121 to abut against the inner rod 122. When the inner rod 122 is adjusted to a suitable length, the bolt is tightened to abut against the inner rod 122, thus fixing the length of the upright 120. The length of the upright 120 can be flexibly adjusted according to the height of the tunnel, expanding the applicability of the device.

[0039] refer to Figure 1 , Figure 4The support assembly 110 is used to stably support the upright 120. The support assembly 110 includes a connecting column 111 and three legs 112. One end of the connecting column 111 is detachably connected to the upright 120 for easy carrying and assembly. A slot 113 is provided on the end face of one end of the connecting column 111 for inserting the outer rod 121. A positioning element 114 is provided on the outer wall of the end of the outer rod 121 away from the inner rod 122. A positioning hole 117 is provided on the connecting column 111 for embedding the positioning element 114. The positioning hole 117 penetrates the groove wall of the slot 113 radially along the connecting column 111. The positioning element 114 includes a positioning protrusion 115 and a connecting spring 116. A partial embedding of the positioning element 114 is provided on the outer wall of the outer rod 121 radially along the outer rod 121. The positioning groove 118 has one end of the connecting spring 116 connected to the bottom of the groove 118, and the other end of the connecting spring 116 connected to the positioning protrusion 115. The positioning protrusion 115 is partially embedded in the positioning groove 118. When the outer rod 121 is inserted into the slot 113, the positioning protrusion 115 and the positioning hole 117 are aligned. The connecting spring 116 drives the positioning protrusion 115 to be embedded in the positioning hole 117, ensuring the accurate connection and fixation of the upright rod 120 and the connecting column 111, and preventing loosening during the measurement process. The three support legs 112 are arranged at equal angles around the circumference of the connecting column 111 to form a stable triangular support structure. Anti-slip rubber pads can be installed on the bottom of the support legs 112 to increase friction and prevent the device from sliding during the measurement process.

[0040] Further reference Figure 1 , Figure 2 and Figure 5 A rotating shaft 132 perpendicular to the upright 120 is rotatably connected to the upright 120. One end of the rotating shaft 132 passes through the turntable 130 and is provided with a clamping assembly 150. The laser rangefinder 140 is connected to the upright 120 through the clamping assembly 150. The clamping assembly 150 includes a clamping part 151 and a connecting part 152 connected to the rotating shaft 132 at one end. The end of the connecting part 152 away from the rotating shaft 132 is connected to an abutment part 153. In this embodiment, the connecting part 152 and the abutment part form an L-shaped structure. The clamping part 151 is slidably disposed on the abutment part 153. The laser rangefinder 140 is located between the abutting part 153 and the connecting part 152 and abuts against the abutting part 153. The abutting part 153 is provided with a tension spring 154 for driving the clamping part 151 to move toward the connecting part 152. The tension spring 154 enables the connecting part 152 and the clamping part 151 to tightly clamp the laser rangefinder 140, reducing the probability of the laser rangefinder 140 shaking. When it is necessary to replace or adjust the laser rangefinder 140, it is only necessary to overcome the tension of the tension spring 154 and move the clamping part 151, which facilitates the assembly and disassembly of the finished laser rangefinder 140 on the pole 120.

[0041] In addition, refer to Figure 1 , Figure 2A pointer 133 is provided on the side of the turntable 130 near the laser rangefinder 140. The pointer 133 is located between the turntable 130 and the laser rangefinder 140 and rotates synchronously with the laser rangefinder 140. The length direction of the pointer 133 is parallel to the measurement direction of the laser rangefinder 140. The tip of the pointer 133 is sharp, which facilitates accurate indication of the scale 131. In this embodiment, the turntable 130 is circular, and the scale 131 is evenly distributed on its circumference, from 0° to 360°, which facilitates reading the rotation angle of the laser rangefinder 140.

[0042] A knob 134 is provided on the end of the rotating shaft 132 away from the clamping assembly 150, making it convenient for the operator to rotate by hand. By rotating the knob 134, the rotating shaft 132 and the laser rangefinder 140 can be easily rotated together to achieve measurements at different angles.

[0043] The implementation principle of the tunnel cross-section measuring device in this application embodiment is as follows: a laser rangefinder 140 of the laser rangefinder type is used to replace the steel tape measure to measure the tunnel cross-section dimensions. When facing a tunnel with a large diameter, the distance to the point to be measured can be measured relatively quickly. In actual operation, the operator places the pole 120 on the centerline of the tunnel close to the cross-section to be measured. By rotating the laser rangefinder 140, the distance to different key points on the tunnel cross-section can be measured. The scale 131 on the turntable 130 provides a reference for the operator to rotate the laser rangefinder 140, making it easy to determine the angle of rotation. The measurement process ensures that the laser rangefinder 140 measures the required points. Measurement data is recorded simultaneously during the measurement process. After the distance measurement of the points on the cross section is completed, it is compared with the cross section design drawing. For design drawings with different calculation methods, the measurement data can be simply converted. Data with large errors can then be judged as over-excavation or under-excavation, thereby achieving a rough measurement of over-excavation or under-excavation of the tunnel cross section. In addition, during the measurement process, the support component 110 can stabilize the pole 120, eliminating the need for the operator to hold and fix the pole 120, making it convenient to rotate the laser rangefinder 140 or record data, further improving the convenience of operation.

[0044] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tunnel cross-section measuring device, characterized in that: The device includes a pole (120) and a laser rangefinder (140) rotatably mounted on the pole (120). The laser rangefinder (140) emits light in a direction perpendicular to the axis of the pole (120). A turntable (130) is also fixedly connected to the pole (120). The turntable (130) has a scale (131) on the side near the laser rangefinder (140) to display the rotation angle of the laser rangefinder (140). A support assembly (110) for supporting the pole (120) is also provided at one end of the pole (120).

2. The tunnel cross-section measuring device according to claim 1, characterized in that: The upright (120) is rotatably connected to a rotating shaft (132) perpendicular to the upright (120). One end of the rotating shaft (132) passes through the turntable (130) and is provided with a clamping assembly (150). The laser rangefinder (140) is connected to the upright (120) through the clamping assembly (150). The clamping assembly (150) includes a clamping part (151) and a connecting part (152) connected at one end to the rotating shaft (132). The connecting part (152) is connected to an abutment part (153) at the end away from the rotating shaft (132). The clamping part (151) is slidably disposed on the abutment part (153). The laser rangefinder (140) is located between the abutment part (153) and the connecting part (152) and abuts against the abutment part (153). The abutment part (153) is provided with a tension spring (154) for driving the clamping part (151) to move toward the connecting part (152).

3. The tunnel cross-section measuring device according to claim 1, characterized in that: A pointer (133) is provided on the side of the turntable (130) near the laser rangefinder (140). The pointer (133) is located between the turntable (130) and the laser rangefinder (140) and rotates synchronously with the laser rangefinder (140). The length direction of the pointer (133) is parallel to the measurement direction of the laser rangefinder (140).

4. The tunnel cross-section measuring device according to claim 2, characterized in that: A knob (134) is provided on the end of the rotating shaft (132) away from the clamping assembly (150).

5. The tunnel cross-section measuring device according to claim 1, characterized in that: The upright (120) is configured as a telescopic pole.

6. The tunnel cross-section measuring device according to claim 5, characterized in that: The upright (120) includes an outer rod (121) and an inner rod (122) slidably embedded in the outer rod (121). The outer rod (121) is threaded with a clamping member (123) for abutting the inner rod (122).

7. A tunnel cross-section measuring device according to claim 6, characterized in that: The support assembly (110) includes a connecting column (111) and three legs (112). One end of the connecting column (111) is detachably connected to the upright (120), and the other end of the connecting column (111) is connected to the three legs (112). The three legs (112) are evenly spaced on the connecting column (111) along the circumference of the connecting column (111).

8. A tunnel cross-section measuring device according to claim 7, characterized in that: A slot (113) for inserting the outer rod (121) is provided on one end face of the connecting post (111). A positioning element (114) is provided on the outer wall of the end of the outer rod (121) away from the inner rod (122). A positioning hole (117) for the positioning element (114) is provided on the connecting post (111). The positioning hole (117) penetrates the groove wall of the slot (113) radially along the connecting post (111).

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