Tunnel blind pipe grooving tool

Abstract

The utility model relates to tunnel construction equipment technical field, concretely relates to a tunnel blind pipe groove carving tool, including antiskid handle, curved line pick head board and two depth marker plates, the pick head board left side end part is the sharp head part, right side end part is the widened circular arc part, two depth marker plates symmetrical welding fixed on pick head board, and located antiskid handle both sides, the distance of left side's depth marker plate to sharp head part tip is 45 55mm, the distance of right side's depth marker plate to widened circular arc part outer edge is 45 55mm, the height of depth marker plate is 45 55mm, is used for limiting the groove depth. The utility model cooperates with special pickaxe construction through groove cutting machine, and pickaxe sets up depth marker plate and realizes groove depth accurate control, and the sharp head part and circular arc part of dual -functional pick head improve the slotting efficiency, and curved pick head board and antiskid handle reduce the labor intensity. Solve the problem of insufficient blind pipe burying depth and insufficient lining concrete thickness of plateau tunnel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction equipment technology, specifically to a tooling for grooving tunnel blind pipes. Background Technology

[0002] Currently, tunnels in China, especially those in high-altitude, cold regions and northern areas, are affected by geological conditions, weather, and temperature. This necessitates burying circumferential blind pipes deep into the initial support face, with insulation boards installed between the initial support face and the lining concrete to prevent freezing and ensure proper drainage. Secondly, traditional construction methods do not involve grooving the blind pipes; instead, they are simply laid on the surface of the initial support concrete and then insulated. While this saves the grooving process, it's essentially installing exposed pipes with insulation, which can easily lead to insufficient thickness in the secondary lining concrete, affecting the overall quality. Therefore, developing a grooving tool that can precisely control the groove depth, while achieving deep burial and freeze protection of the circumferential blind pipes, is a crucial technical problem that urgently needs to be solved in tunnel construction. Utility Model Content

[0003] The purpose of this invention is to provide a tooling for grooving tunnel blind pipes to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tooling for grooving tunnel blind pipes, comprising an anti-slip handle, a curved pick head plate, and two depth marking plates. The left end of the pick head plate is a pointed head, and the right end is a widened arc portion. The two depth marking plates are symmetrically welded and fixed to the pick head plate and located on both sides of the anti-slip handle. The distance from the left depth marking plate to the tip of the pointed head is 45-55mm, and the distance from the right depth marking plate to the outer edge of the widened arc portion is 45-55mm. The height of the depth marking plates is 45-55mm, used to limit the grooving depth.

[0005] Preferably, the horizontal distance between the two depth marking plates is 330-370 mm.

[0006] Preferably, the diameter of the widened arc portion is 55-65mm, and its radius of curvature matches the outer diameter of the Φ50mm blind tube.

[0007] Preferably, the arc length of the pickaxe head plate is 430-470mm, and the pickaxe head plate has a continuous smooth curve.

[0008] Preferably, the anti-slip handle has a length of 950-1050mm and a corrugated anti-slip texture on its surface.

[0009] Compared with the prior art, this utility model provides a tooling for grooving tunnel blind pipes, which has the following advantages:

[0010] 1. The long-handled anti-slip handle allows the tooling to adapt to the grooving construction needs at different heights throughout the tunnel (from the arch to the sidewall).

[0011] 2. This tooling is equipped with a depth marking plate, which can accurately control the groove depth within the designed depth range.

[0012] 3. The pickaxe head plate is designed with a curve, which can well meet the needs of operators and save physical strength during operation.

[0013] 4. The pick is designed with one pointed end and one rounded end. The pointed end enables rapid splitting and grooving of the initial concrete support, while the widened rounded end precisely trims the groove wall to match the outer diameter of the blind pipe. The two complement each other to form an integrated "grooving-finishing" process. Attached Figure Description

[0014] Figure 1 This is the left view of the present invention;

[0015] Figure 2 This is a top view of the present invention.

[0016] Explanation of reference numerals in the attached diagram: 1. Anti-slip handle; 2. Pickaxe head plate; 21. Pointed head; 22. Widened arc section; 3. Depth marking plate. Detailed Implementation

[0017] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0018] like Figure 1-2 As shown, this utility model provides a tooling for grooving tunnel blind pipes, including an anti-slip handle 1, a curved pick plate 2, and two depth marking plates 3.

[0019] The anti-slip handle 1 is made of hollow steel pipe. The length of the anti-slip handle 1 is 950-1050mm, preferably 1000mm. The surface is provided with corrugated anti-slip texture to provide a safe grip point and prevent the tool from slipping out of the hand during operation. The long handle design is ergonomic and adaptable to the grooving construction at different heights throughout the tunnel, without the need to set up an additional working platform.

[0020] The pickaxe plate 2 has an arc length of 430-470mm, preferably 450mm, and is a continuous smooth curve. The left end of the pickaxe plate 2 has a pointed tip 21 for penetrating the initial concrete layer and making preliminary grooves. The right end has a widened arc portion 22 with a diameter of 55-65mm, preferably 60mm, and its radius of curvature matches the outer diameter of the Φ50mm blind pipe. The widened arc portion is used to precisely trim the groove wall to fit snugly against the blind pipe. The curved pickaxe plate 2, through mechanical optimization, transmits the impact force along the arc, reducing the operating torque.

[0021] Two depth marking plates 3 are symmetrically welded and fixed to the pickaxe plate 2, located on both sides of the anti-slip handle 1. The horizontal distance between the two depth marking plates 3 is 330-370mm, preferably 350mm. The distance from the left depth marking plate 3 to the tip of the pointed head 21 is 45-55mm, preferably 50mm, and the distance from the right depth marking plate 3 to the outer edge of the widened arc portion 22 is 45-55mm, preferably 50mm. The height of the depth marking plates 3 is 45-55mm, preferably 50mm, used to define the groove depth. When the bottom surface of the depth marking plate 3 contacts the initial support surface, the groove depth is defined as the height of the depth marking plate 3 being 45-55mm, preferably 50mm.

[0022] Based on the characteristics of the tunnel's initial support face (shotcrete layer), the construction process of this tooling is as follows:

[0023] ① Positioning and cutting: Use a grooving cutter to cut a shallow groove on the initial support surface along the laser reference line;

[0024] ② Initial chiseling and grooving: The operator holds the non-slip handle 1 with both hands and uses the pointed head 21 to chisel the groove vertically until the depth marking plate 3 on the left side contacts the initial support surface (at this time the groove depth reaches 50mm).

[0025] ③ Fine finishing of the groove wall: The rotating tool uses the widened arc part 22 to finish the arc of the groove wall and applies a horizontal finishing force along the length of the groove until the depth marking plate 3 on the right side contacts the initial support surface, forming a smooth groove that matches the outer diameter of the blind pipe.

[0026] ④ Installation and lining of blind pipe: After inserting the Φ50mm circumferential blind pipe, lay the geotextile non-woven fabric, 50mm polyurethane insulation board and EVA waterproof board in sequence, and finally pour the secondary lining concrete. The blind pipe is completely buried in the initial support layer, providing sufficient thickness space for the lining.

[0027] This invention utilizes a curved pick head structure with a specific height and depth marking plate, precisely defining the distance from the pointed end and the widened arc portion to the corresponding marking plate as 45-55mm. This allows operators to intuitively and reliably control the groove depth during grooving, ensuring it strictly reaches the required 50mm depth for blind pipe installation. This fundamentally avoids installation position deviations caused by insufficient or excessive groove depth. Simultaneously, the curved pick head design, combining pointed end grooving positioning with widened arc portion trimming, significantly reduces operator workload and improves construction efficiency. Ultimately, this tooling ensures precise and deep embedding of the circumferential blind pipe within the initial support surface. While effectively preventing freezing and ensuring drainage function, it completely eliminates the problem of insufficient secondary lining concrete thickness caused by traditional open pipe laying methods, significantly improving the structural quality and long-term safety of the tunnel.

[0028] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A tooling for grooving tunnel blind pipes, characterized in that: The device includes an anti-slip handle (1), a curved pickaxe plate (2), and two depth marking plates (3). The left end of the pickaxe plate (2) is a pointed head (21), and the right end is a widened arc portion (22). The two depth marking plates (3) are symmetrically welded and fixed on the pickaxe plate (2) and located on both sides of the anti-slip handle (1). The distance from the left depth marking plate (3) to the tip of the pointed head (21) is 45-55mm, and the distance from the right depth marking plate (3) to the outer edge of the widened arc portion (22) is 45-55mm. The height of the depth marking plate (3) is 45-55mm, which is used to limit the depth of the groove.

2. The tunnel blind pipe grooving tooling according to claim 1, characterized in that: The horizontal distance between the two depth marker plates (3) is 330-370 mm.

3. The tunnel blind pipe grooving tooling according to claim 1, characterized in that: The diameter of the widened arc portion (22) is 55-65mm, and its radius of curvature matches the outer diameter of the Φ50mm blind tube.

4. The tunnel blind pipe grooving tooling according to claim 1, characterized in that: The arc length of the pickaxe plate (2) is 430-470mm, and the pickaxe plate (2) has a continuous smooth curve.

5. The tunnel blind pipe grooving tooling according to claim 1, characterized in that: The anti-slip handle (1) is 950-1050mm long and has a corrugated anti-slip texture on its surface.

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