A line marking positioning tool for cutting of a tunnel primary support inverted arch centering

Abstract

The utility model discloses a kind of tunnel primary support inverted arch arch cutting's scribe positioning tool, belong to tunnel engineering construction technical field.It includes symmetrical V type arrangement's left beveling positioning gauge and right beveling positioning gauge, vertical through and fixed in the middle part of two I-beam centerline alignment rod, bevel gauge connecting reinforcing bar connecting two middle regions, and respectively being located in two ends of span adjustable telescopic arm, telescopic arm is equipped with limit bolt, the V type end of left beveling positioning gauge and right beveling positioning gauge and the other end part is equipped with I-beam main positioning groove and I-beam auxiliary positioning groove respectively.The tool solves the problem of low precision, low efficiency, poor versatility of existing positioning mode, with the advantages of high positioning accuracy, simple operation, strong versatility, stable structure, suitable for cutting scribe positioning of tunnel primary support inverted arch arch.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering construction technology, and more specifically to a marking and positioning tool for cutting the arch frame of the initial support arch of a tunnel. Background Technology

[0002] In tunnel construction, the processing quality of the initial support arch frame directly affects the structural stability of the tunnel. Currently, when cutting and marking the arch frame for positioning, manual, experience-based rough positioning is often used. This method not only has low positioning accuracy, making it difficult to accurately align the cut arch frames during splicing and affecting the stability of the tunnel structure, but also consumes a lot of time, severely reducing construction efficiency. Furthermore, some existing positioning tools are complex in structure, inconvenient to operate, and difficult to adapt to different specifications of arch frames, resulting in poor versatility. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems of low positioning accuracy, low efficiency and poor versatility of the existing tunnel initial support arch frame cutting marking and positioning method. This utility model provides a marking and positioning tool for cutting tunnel initial support arch frames that is simple in structure, easy to operate, highly accurate in positioning and highly versatile.

[0004] The technical solution adopted by this utility model is as follows: a marking and positioning fixture for cutting the arch frame of the initial support arch of a tunnel, comprising: a left oblique cutting positioning gauge and a right oblique cutting positioning gauge arranged symmetrically in a V-shape; an I-beam centerline alignment rod that penetrates vertically and is fixedly connected to the middle of the left oblique cutting positioning gauge and the right oblique cutting positioning gauge; an oblique gauge connecting reinforcing rib fixedly connected to the middle area between the left oblique cutting positioning gauge and the right oblique cutting positioning gauge; adjustable telescopic arms with adjustable spans respectively set at the ends of the left oblique cutting positioning gauge and the right oblique cutting positioning gauge; the adjustable telescopic arms are provided with telescopic stroke limit bolts; the V-shaped ends of the left oblique cutting positioning gauge and the right oblique cutting positioning gauge are provided with I-beam main positioning grooves, and the other ends are provided with I-beam secondary positioning grooves.

[0005] Preferably, the symmetrical V-shaped angle between the left oblique positioning gauge and the right oblique positioning gauge is 30°-60°.

[0006] Preferably, the oblique gauge connecting reinforcing rib has a triangular plate-like structure, with its two right-angled sides welded and fixed to the inner sidewalls of the left oblique cutting positioning gauge and the right oblique cutting positioning gauge, respectively.

[0007] Preferably, the adjustable telescopic arm consists of an inner sleeve and an outer sleeve, and the telescopic stroke limiting bolt is a bolt with a locking nut that passes through the positioning holes of the inner sleeve and the outer sleeve.

[0008] Preferably, both the main positioning groove and the secondary positioning groove of the I-beam are U-shaped groove structures, and the width of the groove opening is matched with the flange thickness of the I-beam of the inverted arch frame.

[0009] Preferably, the I-beam sub-positioning groove is an L-shaped hook structure, and the height of its vertical side is 1.2-1.5 times the width of the I-beam flange.

[0010] Preferably, the centerline of the I-beam is fitted with a grip anti-slip and wear-resistant pad on the top of the pole, and the wear-resistant pad is made of rubber material with a corrugated surface.

[0011] Preferably, the inner walls of the main positioning groove and the secondary positioning groove of the I-beam are provided with anti-slip texture.

[0012] Preferably, the telescopic arm with adjustable span has a telescopic adjustment range of 200-500mm.

[0013] Preferably, the left oblique cutting positioning gauge, the right oblique cutting positioning gauge, the I-beam centerline alignment rod, and the span adjustable telescopic arm are all made of Q345B alloy structural steel.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] 1. By setting the main positioning groove and the secondary positioning groove of the I-beam, this utility model can closely cooperate with the I-beam of the arch frame. At the same time, the centerline of the I-beam is aligned with the rod to ensure accurate centerline positioning, which greatly improves the positioning accuracy of cutting and marking and ensures the quality of arch frame splicing.

[0016] 2. The tooling structure of this utility model is reasonably designed, and the functions of each component are clearly defined. Operators only need to install the tooling on the arch frame according to the positioning requirements to perform marking, which simplifies the positioning operation process and reduces the labor intensity of operators.

[0017] 3. The adjustable telescopic arm of this utility model can be extended and retracted according to different specifications of arch frames, adapting to different span requirements and expanding the application range of the tooling.

[0018] 4. The reinforcing ribs of the oblique gauge connection enhance the connection strength between the left and right oblique cutting positioning gauges. The components made of Q345B alloy structural steel improve the overall structural strength and durability of the tooling, ensuring that the tooling maintains stable performance during long-term use. Attached Figure Description

[0019] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a top view of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0023] The markings in the diagram are: 1-left oblique cutting positioning gauge, 2-right oblique cutting positioning gauge, 3-I-beam centerline alignment rod, 4-oblique gauge connecting reinforcing rib, 5-span adjustable telescopic arm, 6-telescopic stroke limit bolt, 7-I-beam secondary positioning groove, 8-I-beam main positioning groove, 9-handle anti-slip and wear-resistant pad. Detailed Implementation

[0024] 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] In one embodiment of this utility model, such as Figure 1-3 As shown, this embodiment provides a marking and positioning fixture for cutting the arch frame of the tunnel initial support arch, including: a left oblique cutting positioning gauge 1 and a right oblique cutting positioning gauge 2 arranged symmetrically in a V-shape; an I-beam centerline alignment rod 3 that vertically penetrates and is fixedly connected to the middle of the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2; an oblique gauge connecting reinforcing rib 4 fixedly connected to the middle area between the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2; and adjustable telescopic arms 5 with adjustable spans respectively set at the ends of the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2; the adjustable telescopic arms 5 are provided with telescopic stroke limit bolts 6; the V-shaped ends of the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2 are provided with I-beam main positioning grooves 8, and the other ends are provided with I-beam secondary positioning grooves 7.

[0027] In another embodiment of this utility model, the symmetrical V-shaped angle between the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2 is 30°-60°. This angle range can meet the cutting and marking positioning requirements of most tunnel initial support arch frames, ensuring the accuracy of positioning.

[0028] In another embodiment of this utility model, the oblique gauge connecting reinforcing rib 4 is a triangular plate structure, with its two right-angled sides welded and fixed to the inner sidewalls of the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2, respectively. The triangular structure has good stability and can effectively enhance the connection strength between the left oblique cutting positioning gauge 1 and the right oblique cutting positioning gauge 2, thereby improving the overall structural stability of the tooling.

[0029] In another embodiment of this utility model, the adjustable span telescopic arm 5 consists of an inner sleeve and an outer sleeve, and the telescopic stroke limiting bolt 6 is a bolt with a locking nut that passes through the positioning holes of the inner sleeve and the outer sleeve. By adjusting the telescopic length of the inner sleeve in the outer sleeve and fixing it with the telescopic stroke limiting bolt 6, the span can be flexibly adjusted to adapt to different specifications of inverted arch frames.

[0030] In another embodiment of this utility model, both the main positioning groove 8 and the secondary positioning groove 7 of the I-beam are U-shaped groove structures, and the width of their groove openings is matched with the thickness of the flange of the I-beam of the inverted arch frame. This structural design ensures that the positioning groove fits tightly with the flange of the I-beam, improving the positioning accuracy.

[0031] In another embodiment of this utility model, the I-beam secondary positioning groove 7 is an L-shaped hook structure, the height of which is 1.2-1.5 times the width of the I-beam flange. The L-shaped hook structure can better hold the I-beam, preventing the tooling from shifting during the positioning process and further ensuring the stability of the positioning.

[0032] In another embodiment of this utility model, a grip anti-slip and wear-resistant pad 9 is fitted onto the top of the centerline of the I-beam aligned with the rod 3. This wear-resistant pad is made of rubber material with a corrugated surface. The anti-slip and wear-resistant pad can increase the friction when the operator grips it, prevent slippage, and improve the comfort of gripping. In addition, the rubber material has good wear resistance, extending the service life of the tooling.

[0033] In another embodiment of this utility model, the inner walls of the main positioning groove 8 and the secondary positioning groove 7 of the I-beam are provided with anti-slip textures, which can increase the friction between the positioning groove and the I-beam, avoid relative sliding during the positioning process, and improve the reliability of positioning.

[0034] In another embodiment of this utility model, the telescopic arm 5 with adjustable span has a telescopic adjustment range of 200-500mm, which can meet the positioning requirements of arch frames of different sizes and enhance the versatility of the tooling.

[0035] In another embodiment of this utility model, the left oblique positioning gauge 1, the right oblique positioning gauge 2, the I-beam centerline alignment rod 3, and the adjustable-span telescopic arm 5 are all made of Q345B alloy structural steel. Q345B alloy structural steel has high strength and toughness, ensuring that the tooling is not easily deformed during use, thus improving the durability of the tooling.

[0036] The working principle of this utility model is as follows: In use, the length of the adjustable telescopic arm 5 is adjusted according to the specifications of the I-beam of the inverted arch frame, and fixed by the telescopic stroke limit bolt 6. The main positioning groove 8 and the secondary positioning groove 7 of the I-beam are engaged on the I-beam of the inverted arch frame, and the centerline of the I-beam is aligned with the centerline of the alignment rod 3 to perform the cutting and marking positioning operation.

[0037] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A marking and positioning tool for cutting the arch frame of the initial support invert of a tunnel, characterized in that, include: The left oblique cutting positioning gauge (1) and the right oblique cutting positioning gauge (2) are arranged in a symmetrical V-shape; A vertically penetrating and fixedly connected I-beam centerline alignment rod (3) is installed between the left oblique positioning gauge (1) and the right oblique positioning gauge (2); A diagonal gauge connecting reinforcing rib (4) is fixedly connected to the middle area between the left diagonal positioning gauge (1) and the right diagonal positioning gauge (2); Adjustable telescopic arms (5) are respectively set at the ends of the left oblique positioning gauge (1) and the right oblique positioning gauge (2); The adjustable telescopic arm (5) is provided with a telescopic stroke limit bolt (6); The left oblique cutting positioning gauge (1) and the right oblique cutting positioning gauge (2) are provided with I-beam main positioning groove (8) at their V-shaped ends and I-beam secondary positioning groove (7) at their other ends.

2. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The symmetrical V-shaped angle between the left oblique positioning gauge (1) and the right oblique positioning gauge (2) is 30°-60°.

3. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The oblique gauge connecting reinforcing rib (4) has a triangular plate structure, and its two right-angled sides are welded and fixed to the inner sidewalls of the left oblique cutting positioning gauge (1) and the right oblique cutting positioning gauge (2).

4. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The adjustable telescopic arm (5) consists of an inner sleeve and an outer sleeve, and the telescopic stroke limit bolt (6) is a bolt with a locking nut that passes through the positioning holes of the inner sleeve and the outer sleeve.

5. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The main positioning groove (8) and the secondary positioning groove (7) of the I-beam are both U-shaped groove structures, and their groove width is matched with the flange thickness of the I-beam of the arch frame.

6. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The I-beam sub-positioning groove (7) is an L-shaped hook structure, and its vertical side height is 1.2-1.5 times the width of the I-beam flange.

7. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The top of the I-beam centerline alignment rod (3) is fitted with a grip anti-slip wear-resistant pad (9), which is made of rubber material with a corrugated surface.

8. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 5, characterized in that: The inner walls of the main positioning groove (8) and the secondary positioning groove (7) of the I-beam are provided with anti-slip texture.

9. The marking and positioning fixture for cutting the tunnel initial support arch frame according to claim 1, characterized in that: The telescopic adjustment range of the adjustable span telescopic arm (5) is 200-500mm.

10. The marking and positioning fixture for cutting the tunnel initial support arch frame according to any one of claims 1-9, characterized in that: The left oblique cutting positioning gauge (1), the right oblique cutting positioning gauge (2), the I-beam centerline alignment rod (3), and the span adjustable telescopic arm (5) are all made of Q345B alloy structural steel.

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