Adjustable measuring support for circular tunnel

Abstract

The utility model discloses a circular tunnel adjustable measuring support which comprises a triangular tray base, three screw rods, a supporting column, a circular gear tray, a connecting buckle and a connecting rod. The three screw rods penetrate through three inner corners of the triangular tray base respectively and are in threaded connection with the triangular tray base. The supporting columns are fixedly connected with the triangular tray base and the circular gear tray, the supporting columns are arranged between the triangular tray base and the circular gear tray, a circular hole is formed in the center of the circular gear tray, and the connecting buckle is fixedly connected with the center of the bottom of the circular gear tray. And the connecting rod passes through the hole groove of the connecting buckle and is in threaded connection with the measuring instrument. The adjustable measuring support for the circular tunnel is simple in structure, convenient to use and capable of improving the measuring precision and the measuring operation efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of municipal engineering construction, and particularly relates to an adjustable measuring bracket for a circular tunnel. Background Art

[0002] In the construction of shield and TBM projects, with the construction of domestic water conservancy and hydropower, highways and urban subways, more and more projects are constructed by shield and TBM. The conditions in the shield and TBM construction tunnels are limited. The battery car tracks, wind, water, pipelines, shield mud and water system water inlet pipes and mud discharge pipes, and walkway plates in the tunnel all occupy most of the space in the tunnel, which has local obstructions to the layout of measurement points, bringing corresponding difficulties to the surveyors, and also causing local impact on the surveyors during the operation. Therefore, the surveying operators choose to arrange the measurement control points in the tunnel at effective corresponding positions. If they choose to arrange them at the bottom of the tunnel center, there will be too much mud and water in the tunnel, and the measurement control points will be covered by the mud and muddy water used to flush the pipe segments. The surveyors will have many difficulties in finding and cleaning the mud at the points, which also takes up most of the manpower, material resources and time. In addition, some shield tail grease will be on the surface of the pipe segments during the flushing process, which will affect the measurement. The installation of instruments by personnel is prone to side slipping, which poses a risk of side slipping and falling for the measuring equipment. The measurement control points are arranged at the corresponding positions of the drainage pipelines below the waistline of the pipe segments. Because the pipe segments are circular, the height difference formed is large, making it difficult for surveyors to arrange and set up the stable position of the measurement triangle support points when setting up the instrument tripod. It is also difficult for surveyors to operate the instruments for leveling. It takes a lot of time to adjust the measurement tripod and the selection of measurement positions, and even more time to set up stations. As a result, the control of the shield machine and TBM excavation guide system is delayed, which affects the shield and TBM excavation construction. The long time for surveyors to set up stations leads to excessive measurement errors and inefficient excavation construction progress. At the same time, the construction cost increases, and the impact on the project schedule is more likely to increase cost control. Therefore, there are greater measurement safety risks and cost control. In order to prevent the above factors from occurring, conventional measurements are no longer suitable in current engineering construction. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an adjustable circular tunnel measuring bracket which has a simple structure, is easy to use and can improve measuring accuracy and measuring operation efficiency.

[0004] The technical solution of the utility model is: a circular tunnel adjustable measuring bracket, comprising: a triangular tray base, a screw, a support column, a circular gear tray, a connecting buckle, and a connecting rod. The triangular tray base is a triangular frame structure, and the three screws respectively pass through the three inner corners of the triangular tray base and are threadedly connected to the triangular tray base. The three screws are perpendicular to the horizontal plane, one end of the support column is fixedly connected to the triangular tray base, and the other end of the support column is fixedly connected to the bottom of the circular gear tray. A number of support columns are arranged between the triangular tray base and the circular gear tray, a circular hole is opened at the center position of the circular gear tray, the connecting buckle is fixedly connected to the bottom center position of the circular gear tray, and the connecting rod passes through the hole groove of the connecting buckle and is threadedly connected to the measuring instrument.

[0005] Furthermore, one end of the screw is conical, and the other end of the screw is fixedly connected to the nut.

[0006] Furthermore, three support columns are provided between the triangular tray base and the circular gear tray, and two ends of the support columns are respectively fixedly connected obliquely to the corner tray base and the circular gear tray.

[0007] Furthermore, the connecting buckle is a bar frame structure, and the connecting buckle is fixedly connected to the bottom of the circular gear tray through fixing nails.

[0008] Furthermore, the connecting rod is a hollow rod structure.

[0009] The beneficial effects of the utility model are as follows: the utility model is a circular tunnel adjustable measuring bracket, which uses a screw as the supporting structure of the measuring bracket, thereby realizing the stable fixation of the measuring bracket on the circular tunnel pipe segment; by using a connecting buckle and a connecting rod to connect and fix the measuring instrument to the measuring bracket, the measuring instrument can be stably fixed on the measuring bracket, thereby improving the measurement accuracy; in summary, the utility model is a circular tunnel adjustable measuring bracket with a simple structure, easy to use, and can improve the measurement accuracy and measurement operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 It is a structural schematic diagram of an adjustable measuring bracket for a circular tunnel according to the present invention.

[0012] Figure 2 This is a schematic diagram of the use status of a circular tunnel adjustable measuring bracket of the utility model.

[0013] Figure 3 It is a schematic diagram of the planar structure of an adjustable measuring bracket for a circular tunnel according to the present invention.

[0014] Figure 4 It is a structural schematic diagram of a connecting buckle of a circular tunnel adjustable measuring bracket of the utility model.

[0015] Figure 5 It is a structural schematic diagram of a connecting rod of an adjustable measuring bracket for a circular tunnel according to the present invention.

[0016] In the figure: 1-triangular tray base, 2-screw, 3-nut, 4-support column, 5-circular gear tray, 6-connecting buckle, 7-connecting rod, 8-measurement control point, 9-measuring instrument, 10-segment, 11-measuring instrument centering laser. DETAILED DESCRIPTION

[0017] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0018] like Figure 1-5As shown, a circular tunnel adjustable measuring bracket includes: a triangular tray base 1, a screw 2, a support column 4, a circular gear tray 5, a connecting buckle 6, and a connecting rod 7. The triangular tray base 1 is a triangular frame structure (a 313mm equilateral triangle is made of a 10mm thick steel plate, and the three corners of the triangle are processed into chamfers with a chamfer radius of 25mm. The center steel plate is removed from the outer edge of the vertical triangle 40mm inward to form a hollow inner triangle. The three corners of the inner triangle are respectively cut into chamfers with a chamfer radius of 25mm, and all the cut burrs are polished smooth. Then, a screw hole is opened with a center diameter of 20mm at a point 33mm inward from the chamfer line of the outer edge of the outer triangle). The three screws 2 (330mm long) pass through the triangular tray base 1 respectively. The three inner corners are connected to the triangular tray base 1 by threads, and the three screw rods 2 are perpendicular to the horizontal plane. One end of the support column 4 (304mm long and 20mm wide steel strip) is fixedly connected to the triangular tray base 1, and the other end of the support column 4 is fixedly connected to the bottom of the circular gear tray 5. Several support columns 4 are set between the triangular tray base 1 and the circular gear tray 5. A circular hole is opened at the center of the circular gear tray 5 (a 140mm diameter circle with a protruding 20mm gear is made of 10mm thick steel plate. The protruding gear is in the same direction as the rounded corners of the triangular tray base (1), and a 76mm diameter hole is opened in the center of the disk). The connecting buckle 6 is fixedly connected to the bottom center of the circular gear tray 5. The connecting rod 7 passes through the hole groove of the connecting buckle 6 and is threadedly connected to the measuring instrument 9.

[0019] Preferably, one end of the screw 2 is conical, and the other end of the screw 2 is fixedly connected to the nut 3.

[0020] Preferably, three support columns 4 are provided between the triangular tray base 1 and the circular gear tray 5 , and two ends of the support columns 4 are fixedly connected obliquely to the triangular tray base 1 and the circular gear tray 5 , respectively.

[0021] Preferably, three support columns 4 are provided between the triangular tray base 1 and the circular gear tray 5 , and two ends of the support columns 4 are fixedly connected obliquely to the triangular tray base 1 and the circular gear tray 5 , respectively.

[0022] Preferably, the connecting buckle 6 is a bar frame structure, and the connecting buckle 6 is fixedly connected to the bottom of the circular gear tray 5 through fixing nails.

[0023] Preferably, the connecting rod 7 is a hollow rod structure.

[0024] It should be noted that the connecting buckle 6 can adopt a total station connecting buckle that is matched with a connecting rod of a total station, and the connecting rod 7 can adopt a total station connecting rod that is matched with a connecting wire device of a total station.

[0025] During use, the measuring support frame is set up on the pipe segment 10 so that the measuring control point 8 coincides with the center of the measuring support frame, and then the screw rod 2 of the measuring support is used for rough leveling, and then the measuring instrument 9 is connected to the top of the measuring support frame, and the measuring instrument 9 is fixed firmly, and then the centering laser 11 of the measuring instrument is placed at the corresponding position of the center of the measuring control point 8, that is, the laser of the measuring instrument 9 and the center of the measuring control point 8 are on the vertical line of the laser of the measuring instrument 9. Finally, the total station is centered and leveled according to the measurement specifications. After the total station is centered and leveled, the corresponding measurement work is completed.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and various changes can be made thereto within the scope of knowledge possessed by those skilled in the art.

Claims

1. A circular tunnel adjustable measuring bracket, characterized in that: include: A triangular tray base (1), a screw rod (2), a support column (4), a circular gear tray (5), a connecting buckle (6), and a connecting rod (7), wherein the triangular tray base (1) is a triangular frame structure, the three screw rods (2) respectively pass through the three inner corners of the triangular tray base (1) and are threadedly connected to the triangular tray base (1), the three screw rods (2) are perpendicular to the horizontal plane, one end of the support column (4) is fixedly connected to the triangular tray base (1), and the other end of the support column (4) is fixedly connected to the bottom of the circular gear tray (5), a plurality of support columns (4) are provided between the triangular tray base (1) and the circular gear tray (5), a circular hole is opened at the center position of the circular gear tray (5), the connecting buckle (6) is fixedly connected to the center position of the bottom of the circular gear tray (5), and the connecting rod (7) passes through the hole slot of the connecting buckle (6) and is threadedly connected to the measuring instrument (9).

2. The circular tunnel adjustable measuring bracket according to claim 1, characterized in that: One end of the screw (2) is conical, and the other end of the screw (2) is fixedly connected to the nut (3).

3. The circular tunnel adjustable measuring bracket according to claim 1, characterized in that: Three support columns (4) are provided between the triangular tray base (1) and the circular gear tray (5), and two ends of the support columns (4) are respectively fixedly connected obliquely to the triangular tray base (1) and the circular gear tray (5).

4. The circular tunnel adjustable measuring bracket according to claim 1, characterized in that: The connecting buckle (6) is a bar frame structure, and the connecting buckle (6) is fixedly connected to the bottom of the circular gear tray (5) via a fixing nail.

5. The circular tunnel adjustable measuring bracket according to claim 1, characterized in that: The connecting rod (7) is a hollow rod structure.

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