Adjustable anchor hole cutting positioning plate for feet-lock anchor pipe of steel arch

Abstract

The utility model relates to an adjustable anchor hole cutting positioning plate for a foot-lock anchor pipe of a steel arch. The positioning plate consists of a steel arch anchor hole positioning plate and a steel arch fixing plate which are connected together through a limiting bolt. A pair of steel arch positioning holes are formed in the steel arch anchor hole positioning plate; the steel arch fixing plate is provided with a pair of fixing hole sites, and a soft handle is arranged between the pair of fixing hole sites. The device is simple to operate, can be automatically adjusted within the range of 30-45 degrees, and solves the problem that the inclination angle is less than 30 degrees due to labor saving of workers.

Description

Technical Field

[0001] The utility model relates to the technical field of highway engineering tunnel construction, in particular to an adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate. Background Art

[0002] In highway engineering tunnel construction, steel arches, steel mesh and shotcrete are required for initial support after tunnel excavation, which can provide better support for the surrounding rock. During the installation of the steel arch, in order to improve the stability of the steel arch, it is also necessary to use locking anchor pipes to drive into the surrounding rock. Its function is to make the steel arch and the locking anchor pipe bear force together, and transmit part of the force to the inside of the surrounding rock, so as to ensure the next working surface. Therefore, the construction quality of this process becomes the key point to control.

[0003] The installation of the locking foot anchor pipe requires drilling anchor holes in the surrounding rock. The position and inclination of the anchor holes are often subject to design requirements, generally in the range of 30° to 45° parallel to the horizontal plane. Usually, when workers use handheld drills to drill holes during the operation, they cannot accurately locate the hole height and inclination angle. Sometimes, in order to ensure construction efficiency, the inclination angle is less than 30°, which may cause quality problems such as sinking of the steel arch frame and cracking of the support in the later stage, and it is also impossible to ensure the safe development of subsequent work. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate which is simple to operate and can adjust the angle autonomously.

[0005] In order to solve the above problems, the utility model describes an adjustable steel arch frame locking foot anchor pipe anchor hole cutting positioning plate, which is characterized in that: the positioning plate is composed of a steel arch frame anchor hole positioning plate and a steel arch frame fixing plate connected together by limiting bolts; the steel arch frame anchor hole positioning plate is provided with a pair of steel arch frame positioning holes; the steel arch frame fixing plate is provided with a pair of fixing hole positions, and a soft handle is provided between the pair of fixing hole positions.

[0006] The cross section of the steel arch anchor hole positioning plate is rectangular.

[0007] A pair of the steel arch frame positioning holes are arranged along the diagonal line of the steel arch frame anchor hole positioning plate.

[0008] The steel arch frame anchor hole positioning plate is at an angle of 30° to 45° with a center line connecting a pair of steel arch frame positioning holes in a horizontal position.

[0009] The steel arch frame fixing plate is composed of an upper part and a lower part connected as one body; the upper part has a rectangular cross-section, and one short side is arc-shaped and connected to the steel arch frame anchor hole positioning plate through the limiting bolt, and the other short side is connected to the lower part; the lower part has a trapezoidal cross-section; a pair of fixing holes are arranged longitudinally along the upper part of the steel arch frame fixing plate.

[0010] The lower bottom edge width of the steel arch fixing plate is ≤ the width of the steel arch web.

[0011] The height of the steel arch fixing plate is determined according to the design of the locking foot anchor rod drawing.

[0012] The distance between a pair of the fixing holes is 15 cm; the diameter of each of the fixing holes is 2 cm.

[0013] The limiting bolt is arranged between the steel arch frame anchor hole positioning plate and the steel arch frame fixing plate.

[0014] The soft handle passes through a pair of fixing holes.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model is composed of a steel arch frame anchor hole positioning plate and a steel arch frame fixing plate connected together by limiting bolts. A pair of steel arch frame positioning holes are arranged on the steel arch frame anchor hole positioning plate. Therefore, compared with the original manual positioning construction, the problem of inaccurate positioning of the height and inclination angle of the anchor hole of the locking foot anchor pipe is solved, especially that the angle can be adjusted independently within the range of 30°~45°, which solves the problem of the inclination angle being less than 30° due to workers saving effort.

[0017] 2. The utility model is provided with a soft handle, which can be carried by one person to accurately locate the hole. Therefore, compared with the existing fixed guide frame, it is more portable, easy to operate, time-saving and labor-saving. Under the premise of ensuring the quality of engineering construction, it improves production efficiency to a certain extent and reduces the labor of workers.

[0018] 3. The utility model is compact in design and easy to operate, which is more convenient and quicker than the prior art and can be better used as a tool in tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] In the figure: 1-steel arch frame anchor hole positioning plate; 2-steel arch frame positioning hole; 3-limiting bolt; 4-steel arch frame fixing plate; 5-fixing hole position; 6-soft handle. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, an adjustable steel arch frame locking foot anchor pipe anchor hole cutting positioning plate is composed of a steel arch frame anchor hole positioning plate 1 and a steel arch frame fixing plate 4 connected together by a limiting bolt 3; a pair of steel arch frame positioning holes 2 are provided on the steel arch frame anchor hole positioning plate 1; a pair of fixing hole positions 5 are provided on the steel arch frame fixing plate 4, and a soft handle 6 is provided between the pair of fixing hole positions 5.

[0023] Among them: the cross-section of the steel arch frame anchor hole positioning plate 1 is rectangular, which is made by cutting a steel plate with a height of 10 cm, a width of 8.4 cm, and a thickness of 0.5 cm. The height and rotation angle of the steel arch frame anchor hole positioning plate 1 are determined according to the design drawing.

[0024] A pair of steel arch frame positioning holes 2 are arranged along the diagonal line of the steel arch frame anchor hole positioning plate 1 .

[0025] The steel arch anchor hole positioning plate 1 is at an angle of 30° to 45° with the center line of a pair of steel arch positioning holes 2 in the horizontal position. The vertical line of the center line of the pair of steel arch positioning holes 2 is the inclination angle of the locking foot anchor rod. Due to the action of the limit bolt 3, this angle can be adjusted within a range of 15° (that is, the inclination angle of the locking foot anchor rod is 30° to 45°).

[0026] The steel arch fixing plate 4 is composed of an upper part and a lower part connected as one body; the upper part has a rectangular cross section, and one short side is arc-shaped and connected to the steel arch anchor hole positioning plate 1 through a limit bolt 3, and the other short side is connected to the lower part; the lower part has a trapezoidal cross section; a pair of fixing holes 5 are arranged longitudinally along the upper part of the steel arch fixing plate 4. The steel arch fixing plate 4 is made by cutting an irregular steel plate with a height of 35 cm and a thickness of 0.5 cm.

[0027] The lower bottom edge width of the steel arch fixing plate 4 is ≤ the width of the steel arch web.

[0028] The height of the steel arch fixing plate 4 is determined according to the design of the locking foot anchor rod drawing.

[0029] In order to solve the problem that locking foot anchor pipes need to be driven into the steel arch frames on both sides during use, a pair of fixing holes 5 are opened in the middle position of the steel arch frame fixing plate 4, and the spacing between the pair of fixing holes 5 is 15 cm; the diameter of each fixing hole 5 is 2 cm.

[0030] The limiting bolt 3 is arranged between the steel arch frame anchor hole positioning plate 1 and the steel arch frame fixing plate 4, so that the angle of the steel arch frame anchor hole positioning plate 1 can be adjusted. The limiting bolt 3 can adjust the angle of the steel arch frame positioning hole 2 by 30°~45° according to the design requirements.

[0031] The soft handle 6 passes through a pair of fixed holes 5, and its purpose is to facilitate carrying and quick transfer. It can be moved at will during construction; and the device can be used on both sides, and both the left and right steel arch frames can meet the design requirements. The soft handle 6 is preferably made of leather or other materials with good tensile properties and small elastic deformation.

[0032] Working principle: fix the bottom edge of the steel arch fixing plate 4 on the arch foot of the steel arch, insert two locking rings that have been bent and welded into a pair of steel arch positioning holes 2 to provide guidance for the drill rod of the drilling rig. Adjust the limit bolts 3, and the steel arch anchor hole positioning plate 1 can swing left and right, with a maximum amplitude of 15°. When it is rotated clockwise to the extreme position, the pair of fixed holes 5 form an angle of 45° with the horizontal plane; conversely, when it is rotated counterclockwise to the extreme position, the pair of fixed holes 5 form an angle of 30° with the horizontal plane.

[0033] Locking foot anchor pipes often appear on both sides of the tunnel. For example, after the hole is cut in the left steel arch frame, the device needs to be flipped 180° when cutting the hole on the right side to ensure that the anchor hole angle is downward.

[0034] During the construction process, after placing the utility model at the position of the arch foot of the steel arch frame, determine the inclination angle of the locking foot anchor pipe, rotate the steel arch frame anchor hole positioning plate 1, so that one side of it is in close contact with the steel arch frame anchor hole positioning plate 1, and then rotate the limit bolt 3 to fix the steel arch frame anchor hole positioning plate 1, and then complete the positioning and mark the steel arch frame positioning hole 2 on the steel arch frame to start the hole cutting work; after the left side of the steel arch frame is positioned, continue to position the right side, and then the device needs to be turned 180° and used on the right side of the steel arch frame to ensure that the anchor hole angle is downward. Due to the soft handle 6, the gap between the utility model and the web of the steel arch frame during use can be ignored. The impact on the hole cutting work.

[0035] During use of the utility model, attention should be paid to the mirroring principle when cutting holes in the steel arch frames on both sides. When placing the left and right sides, the hole position of the outer flange plate of the steel arch frame is lower than the hole position of the inner flange plate, and then the inclination angle is determined to ensure that the locking foot anchor pipe is angled downward.

[0036] The height and rotation range of the steel arch anchor hole positioning plate 1 in the utility model are based on the design height and inclination of the locking foot anchor pipe, which can meet the general tunnel engineering construction, and is particularly suitable for locking foot anchor rods with a height of 40 cm and an angle of 30° and 45°. The words 30° and 45° can also be marked on both sides of the steel arch anchor hole positioning plate 1 to facilitate construction operations.

Claims

1. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate, characterized in that: The positioning plate is composed of a steel arch frame anchor hole positioning plate (1) and a steel arch frame fixing plate (4) connected together by limiting bolts (3); the steel arch frame anchor hole positioning plate (1) is provided with a pair of steel arch frame positioning holes (2); the steel arch frame fixing plate (4) is provided with a pair of fixing hole positions (5), and a soft handle (6) is provided between the pair of fixing hole positions (5).

2. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 1, characterized in that: The cross section of the steel arch anchor hole positioning plate (1) is rectangular.

3. The adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 1, characterized in that: A pair of the steel arch frame positioning holes (2) are arranged along the diagonal line of the steel arch frame anchor hole positioning plate (1).

4. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 3, characterized in that: The steel arch anchor hole positioning plate (1) is at an angle of 30° to 45° with a center line connecting a pair of steel arch positioning holes (2) in a horizontal position.

5. The adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 1, characterized in that: The steel arch fixing plate (4) is composed of an upper part and a lower part connected as one body; the upper part has a rectangular cross section, and one short side is arc-shaped and connected to the steel arch anchor hole positioning plate (1) through the limiting bolt (3), and the other short side is connected to the lower part; the lower part has a trapezoidal cross section; a pair of fixing holes (5) are arranged longitudinally along the upper part of the steel arch fixing plate (4).

6. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 5, characterized in that: The width of the bottom edge of the steel arch fixing plate (4) is less than or equal to the width of the steel arch web.

7. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 5, characterized in that: The height of the steel arch fixing plate (4) is determined according to the design of the locking foot anchor rod drawing.

8. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 5, characterized in that: The distance between a pair of the fixing holes (5) is 15 cm; and the diameter of each of the fixing holes (5) is 2 cm.

9. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 5, characterized in that: The limiting bolt (3) is arranged between the steel arch frame anchor hole positioning plate (1) and the steel arch frame fixing plate (4).

10. An adjustable steel arch frame locking foot anchor pipe anchor hole cutting and positioning plate as claimed in claim 1, characterized in that: The soft handle (6) passes through a pair of fixing holes (5).

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