Reference point device for tunnel measurement

Abstract

The utility model provides a reference point device for tunnel measurement, which belongs to the technical field of building construction and comprises a concrete base, a protective component and a fixing component. A datum point is pre-buried in the concrete base, and a mounting box is mounted on the surface of the concrete base; the protective cover plate is mounted at the top of the mounting box, the protective cover plate plays a role in protection, so that the reference point is hermetically arranged in the mounting box and is not damaged by external factors, the support plate is mounted on the inner wall of the mounting box, the support is mounted on the surface of the support plate, the connecting shaft is mounted at the top of the support, and the shifting rod is mounted on the inner wall of the protective cover plate. In the process that the protective cover plate covers the mounting box, a shifting rod makes contact with lock hooks rotationally mounted at the two ends of a connecting shaft, the outer wall of the shifting rod is in an arc shape to extrude the lock hooks outwards, at the moment, the lock hooks are stressed to expand and extrude springs at the top of a limiting plate, and after the shifting rod is inserted into the lock hooks in a penetrating mode, the springs reset to push the lock hooks to limit the shifting rod; the protective cover plate is prevented from being automatically opened.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a reference point device for tunnel measurement. Background Technology

[0002] In construction engineering, according to the surveying and construction plan, the on-site surveying and setting-out work and elevation control require the import of original benchmark points. These imported benchmark points are crucial and are used as verification points in daily surveying work. During construction projects, these benchmark points may be damaged to varying degrees. Damage to benchmark points will cause numerous problems in construction work. If the original benchmark points are destroyed, the measurement data will be inaccurate, leading to partial rework, delays in the construction period, and even huge losses. Utility Model Content

[0003] The purpose of this utility model is to provide a benchmark device for tunnel measurement, in order to solve the problem mentioned in the background art that the measurement benchmarks in construction projects will be damaged to varying degrees during construction. If the measurement benchmarks are damaged, it will add a lot of trouble to the construction work. If the original benchmarks are destroyed, the measurement data will be erroneous, resulting in partial rework, delays in the construction period, or even huge losses.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reference point device for tunnel measurement, comprising a concrete base, a protective component, and a fixing component;

[0005] Wherein: a reference point is pre-embedded inside the concrete base, and an installation box is installed on the surface of the concrete base, with the installation box covering the surface of the reference point;

[0006] The protective assembly includes a protective cover hinged to the top of the mounting box, levers mounted on both sides of the inner wall of the protective cover, support plates mounted on both sides of the inner wall of the mounting box, brackets mounted on the surface of the support plates, a connecting shaft mounted on the top of the brackets, and locking hooks symmetrically rotated at both ends of the connecting shaft, with the levers inserted inside the locking hooks.

[0007] The fixing component includes a fixing base installed at the bottom of the mounting box. Fixing holes are provided at the four corners of the fixing base. Anchor rods are inserted into the fixing holes. The anchor rods are pre-embedded and poured into the concrete base. A fixing nut is threaded to the top of the anchor rod.

[0008] As a preferred embodiment of this utility model: limit plates are installed on both sides of the bracket, a spring is installed on the top of the limit plate, and the bottom of one side of the locking hook is in contact with the spring.

[0009] As a preferred embodiment of this utility model, the connection between the fixing base and the mounting box is provided with several reinforcing plates.

[0010] As a preferred embodiment of this utility model, the inner wall of the protective cover is equipped with reinforcing ribs.

[0011] As a preferred embodiment of this utility model, a double-layer sealing ring is installed on the top edge of the mounting box.

[0012] As a preferred embodiment of this utility model, the surface of the protective cover is fitted with a recessed handle.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) A protective cover is installed on the top of the mounting box. The protective cover serves to protect the reference point, which is sealed inside the mounting box and is not damaged by external factors. A support plate is installed on the inner wall of the mounting box. A bracket is installed on the surface of the support plate. A connecting shaft is installed on the top of the bracket. A lever is installed on the inner wall of the protective cover. When the protective cover is placed on the mounting box, the lever contacts the locking hooks that are rotatably installed at both ends of the connecting shaft. The outer wall of the lever is arc-shaped and squeezes the locking hooks outward. At this time, the locking hooks are forcefully expanded and squeeze the spring on the top of the limiting plate. When the lever is inserted into the locking hook, the spring resets and pushes the locking hook to limit the lever, preventing the protective cover from opening automatically. During measurement, the protective cover is pulled to lift the lever and open the locking hook. This structure makes the protective cover automatically lock, thus protecting the reference point.

[0015] (2) A fixing seat is installed at the bottom of the installation box through the fixed components provided. Fixing holes are opened at the corners of the fixing seat. The anchor rod is pre-embedded and poured into the concrete base. The fixing seat is connected to the anchor rod through the fixing holes around the perimeter. The anchor rod and the fixing seat are fixedly installed by fixing nuts to ensure the fixed connection of the installation box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the protective component structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the fixing component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the handle installation structure of this utility model.

[0020] In the diagram: 1. Concrete base; 2. Reference point; 3. Mounting box; 4. Protective components; 41. Protective cover plate; 42. Lever; 43. Support plate; 44. Bracket; 45. Connecting shaft; 46. Locking hook; 47. Limiting plate; 48. Spring; 5. Fixing components; 51. Fixing seat; 52. Fixing hole; 53. Anchor bolt; 54. Fixing nut; 6. Reinforcing plate; 7. Reinforcing rib; 8. Double sealing ring; 9. Handle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figures 1-4 A reference point device for tunnel surveying includes: a concrete base 1, a protective component 4, and a fixing component 5; a reference point 2 is pre-embedded inside the concrete base 1, and an installation box 3 is installed on the surface of the concrete base 1, with the installation box 3 covering the surface of the reference point 2.

[0023] Please see Figure 1 , Figure 2 The protective component 4 includes a protective cover plate 41 hinged to the top of the mounting box 3. A lever 42 is installed on both sides of the inner wall of the protective cover plate 41. A support plate 43 is installed on both sides of the inner wall of the mounting box 3. A bracket 44 is installed on the surface of the support plate 43. A connecting shaft 45 is installed on the top of the bracket 44. Locking hooks 46 are symmetrically rotated at both ends of the connecting shaft 45. The lever 42 is inserted into the locking hook 46. Limiting plates 47 are installed on both sides of the bracket 44. A spring 48 is installed on the top of the limiting plate 47. The bottom side of one side of the locking hook 46 is in contact with the spring 48.

[0024] In practical use: A protective cover plate 41 is installed on the top of the mounting box 3. The protective cover plate 41 serves a protective function, ensuring that the reference point 2 is sealed inside the mounting box 3 and is not damaged by external factors. A support plate 43 is installed on the inner wall of the mounting box 3, and a bracket 44 is installed on the surface of the support plate 43. A connecting shaft 45 is installed on the top of the bracket 44. A lever 42 is installed on the inner wall of the protective cover plate 41. When the protective cover plate 41 is placed over the mounting box 3, the lever 42 and the connecting shaft 45 rotate at both ends. When the installed hook 46 contacts, the outer wall of the lever 42 is arc-shaped and presses the hook 46 outward. At this time, the hook 46 is expanded by force and presses the spring 48 on the top of the limiting plate 47. When the lever 42 is inserted into the hook 46, the spring 48 returns to its original position and pushes the hook 46 to limit the lever 42, preventing the protective cover 41 from opening automatically. During measurement, pulling the protective cover 41 causes the lever 42 to rise and drive the hook 46 to open. This structure makes the protective cover 41 automatically lock, thus protecting the reference point 2.

[0025] Please see Figure 1 , Figure 3 The fixing component 5 includes a fixing seat 51 installed at the bottom of the mounting box 3. Fixing holes 52 are provided at the four corners of the fixing seat 51. Anchor rods 53 are inserted and connected inside the fixing holes 52. The anchor rods 53 are pre-embedded and poured inside the concrete base 1. A fixing nut 54 is threaded to the top of the anchor rods 53.

[0026] In practical use: The bottom of the mounting box 3 is equipped with a fixing seat 51, and fixing holes 52 are opened at the corners of the fixing seat 51. The anchor rod 53 is pre-embedded and poured into the concrete base 1. The fixing seat 51 is connected to the anchor rod 53 through the fixing holes 52 around the perimeter. The anchor rod 53 and the fixing seat 51 are fixedly installed by fixing nuts 54 to ensure the fixed connection of the mounting box 3.

[0027] Please see Figure 1 Several reinforcing plates 6 are provided at the connection between the fixing base 51 and the mounting box 3, and reinforcing ribs 7 are installed on the inner wall of the protective cover plate 41.

[0028] In practical use: a reinforcing plate 6 is provided at the connection between the fixing base 51 and the mounting box 3. The reinforcing plate 6 enhances the connection stability. The inner wall of the protective cover 41 is equipped with reinforcing ribs 7, which makes the protective cover 41 have good compressive strength and prevents the protective cover 41 from being deformed by external force.

[0029] Please see Figure 3 The top edge of the mounting box 3 is fitted with a double-layer sealing ring 8.

[0030] In practical use: The double-layer sealing ring 8 installed on the top edge of the mounting box 3 has good waterproof sealing performance, preventing rainwater from entering the interior of the mounting box 3 and causing corrosion and damage to the reference point 2.

[0031] Please see Figure 4 The protective cover plate 41 is fitted with a recessed handle 9.

[0032] In practical use: The recessed handle 9 installed on the surface of the protective cover 41 makes it convenient to hold the device when opening the installation box 3.

[0033] A protective cover plate 41 is installed on the top of the mounting box 3. The protective cover plate 41 serves a protective function, ensuring that the reference point 2 is sealed inside the mounting box 3 and is not damaged by external factors. A support plate 43 is installed on the inner wall of the mounting box 3, and a bracket 44 is installed on the surface of the support plate 43. A connecting shaft 45 is installed on the top of the bracket 44. A lever 42 is installed on the inner wall of the protective cover plate 41. When the protective cover plate 41 is placed on the mounting box 3, the lever 42 contacts the locking hooks 46 that are rotatably installed at both ends of the connecting shaft 45. The outer wall of the lever 42 is arc-shaped and presses the locking hooks 46 outward. At this time, the locking hooks 46 are forcefully expanded and press the spring 48 on the top of the limiting plate 47. When the lever 42 is inserted into the locking hook 46, the spring 48 returns to its original position and pushes the locking hook 46 to limit the lever 42, preventing the protective cover plate 41 from opening automatically. During measurement, pulling the protective cover plate 41 causes the lever 42 to rise and drive the locking hook 46 to open. This structure makes the protective cover plate 41 automatically lock, thus protecting the reference point 2.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reference point device for tunnel surveying, characterized in that, include: A concrete base (1) has a reference point (2) embedded inside it. An installation box (3) is installed on the surface of the concrete base (1) and the installation box (3) covers the surface of the reference point (2). The protective assembly (4) includes a protective cover plate (41) hinged to the top of the mounting box (3), a lever (42) is installed on both sides of the inner wall of the protective cover plate (41), a support plate (43) is installed on both sides of the inner wall of the mounting box (3), a bracket (44) is installed on the surface of the support plate (43), a connecting shaft (45) is installed on the top of the bracket (44), and a locking hook (46) is symmetrically rotated at both ends of the connecting shaft (45), and the lever (42) is inserted inside the locking hook (46); The fixing component (5) includes a fixing seat (51) installed at the bottom of the mounting box (3). The fixing seat (51) has fixing holes (52) at its four corners. Anchor rods (53) are inserted into the fixing holes (52). The anchor rods (53) are pre-embedded and cast inside the concrete base (1). The top of the anchor rods (53) is threaded with a fixing nut (54).

2. The reference point device for tunnel surveying according to claim 1, characterized in that: Limiting plates (47) are installed on both sides of the bracket (44), and a spring (48) is installed on the top of the limiting plate (47). The bottom side of the locking hook (46) is in contact with the spring (48).

3. The reference point device for tunnel surveying according to claim 1, characterized in that: Several reinforcing plates (6) are provided at the connection between the fixing base (51) and the mounting box (3).

4. A reference point device for tunnel surveying according to claim 1, characterized in that: The inner wall of the protective cover (41) is equipped with reinforcing ribs (7).

5. A reference point device for tunnel surveying according to claim 1, characterized in that: The top edge of the mounting box (3) is fitted with a double-layer sealing ring (8).

6. A reference point device for tunnel surveying according to claim 1, characterized in that: The protective cover (41) is fitted with a recessed handle (9).

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