Protection device for reserved deeply-buried drainage blind pipe
By using a high-density polyethylene protective sleeve on the outside of the reserved transverse blind pipe, the problem of blind pipe being covered during concrete spraying is solved, the protection of blind pipes and the convenience of subsequent connections is achieved, and the construction cost and damage risk are reduced.
Patent Information
- Application Number
- CN202422606781.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-28
AI Technical Summary
During tunnel construction, the reserved transverse blind pipes are easily covered or blocked during concrete spraying, resulting in difficulty in subsequent connection with longitudinal blind pipes. The existing chiseling method is time-consuming and labor-intensive and easy to damage the blind pipes.
The protective sleeve made of high-density polyethylene is set on the outside of the reserved transverse blind pipe. The protective sleeve has a blind pipe hole and is equipped with a handle for easy installation and removal and avoid concrete covering the pipe opening.
Reduce the chance of blind pipe damage, reduce labor costs, improve construction efficiency, and ensure the smooth progress of blind pipe connection.
Smart Images
Figure CN223305784U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tunnel construction, in particular to a protective device for reserving deep-buried blind drainage pipes. Background Art
[0002] During tunnel construction in high-altitude and cold regions, the longitudinal blind pipes of the inverted arch side walls need to be connected to the central deeply buried transverse blind pipes. Existing construction methods generally involve installing arch frames after tunnel bottom excavation. Pre-buried transverse blind pipes are laid between the arch frames, with a portion of the transverse blind pipes extending laterally beyond the arch frames for subsequent connection to the longitudinal blind pipes. The arch frames are then shotcreted. During the shotcreting process, the reserved transverse blind pipes are covered with concrete or blocked by the concrete slurry. At this point, they must be manually removed using an electric pickaxe after the concrete strength reaches 40% of the design strength. Manual removal is time-consuming and labor-intensive. Alternatively, they can be removed using equipment, which can easily render the reserved transverse blind pipes unusable and require rework. Inadequate protection of the reserved transverse blind pipes can affect subsequent connection to the longitudinal blind pipes. Therefore, both manual and equipment removal methods are time-consuming and have numerous drawbacks. Therefore, there is an urgent need for a protective device for the reserved transverse blind pipes that can reduce the coverage of the reserved transverse blind pipes by the concrete slurry. Utility Model Content
[0003] Problem to be solved: Provide a protective device for reserved transverse blind pipes, which plays a protective role for the reserved transverse blind pipes during the concrete spraying process.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective device for a reserved deep-buried drainage blind pipe, comprising a protective sleeve, which is arranged on the outside of the reserved horizontal blind pipe, a blind pipe hole is provided at the axis of the protective sleeve, and the two end faces of the protective sleeve are an upper bottom face and a lower bottom face respectively, the lower bottom face is connected to a handle and the lower bottom face is sleeved in a protective cap.
[0005] Preferably, the protective sleeve is in the shape of a truncated cone, the smaller end surface of the truncated cone is the upper bottom surface, and the height of the truncated cone is not less than the length of the reserved transverse blind tube.
[0006] Preferably, the handle is integrally connected to the lower bottom surface or is detachably connected thereto, and when the handle is integrally connected to the lower bottom surface, the height of the protective cap is greater than the height of the handle.
[0007] Preferably, there are two handles, which are symmetrically arranged on the lower bottom surface, and the outer edge width of the handle is L<(d2-d) / 2, where d is the diameter of the blind tube hole and d2 is the outer diameter of the lower bottom surface.
[0008] Preferably, there is one handle, which is arranged on the lower bottom surface across the blind tube hole, and the inner edge width L1 of the handle is greater than d, where d is the diameter of the blind tube hole.
[0009] Preferably, the protective cover is made of high-density polyethylene.
[0010] Compared with the prior art, the present invention provides a protective device for reserved deep-buried drainage blind pipes, which has the following beneficial effects:
[0011] 1. This device is made of high-density polyethylene, which is light and easy to fix, and does not require a special base or structure.
[0012] 2. When using this device, there is no need to chisel out the reserved horizontal blind pipe opening, which greatly reduces the chance of damage to the reserved blind pipe.
[0013] 3. The geometric dimensions of this device match the space required for the reserved blind pipe and subsequent connection, and can be adjusted as needed.
[0014] 4. The device can be removed after the sprayed concrete solidifies and takes shape. It is simple to fix and easy to remove, which improves the standardization of construction and greatly reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the device of the utility model.
[0016] Figure 2 The present invention is a schematic diagram of a handle involved in the device.
[0017] Explanation of the accompanying reference numerals: 1. reserved transverse blind tube; 2. protective cover; 21. blind tube hole; 22. handle; 23. upper bottom surface; 24. lower bottom surface; 3. protective cap. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention:
[0019] As shown in the figure, the protective device of the device of the present invention is sleeved on the outside of the reserved transverse blind pipe 1. As mentioned in the background technology, transverse blind pipes will be pre-laid in the arch frame during tunnel construction. A section of the transverse blind pipe needs to be reserved for connection with the later longitudinal blind pipe. The reserved transverse blind pipe 1 can avoid the problems mentioned in the background technology after being protected by the protective sleeve 2. The protective device of the device of the present invention includes a protective sleeve 2. The protective sleeve 2 is sleeved on the outside of the reserved transverse blind pipe 1. The axis of the protective sleeve 2 is provided with a blind pipe hole 21. The outer diameter of the reserved transverse blind pipe 1 is tightly fitted with the inner diameter of the blind pipe hole 21 and can be slidably matched, so that the reserved transverse blind pipe 1 can be sleeved in the blind pipe hole 21. The two end faces of the protective sleeve 2 are the upper bottom face 23 and the lower bottom face 24, respectively. The reserved transverse blind pipe 1 is removed from The upper bottom surface 23 is inserted sideways. Since the height of the protective cover 2 is greater than the length of the reserved transverse blind tube 1, the protective cover 2 can completely insert and protect the reserved transverse blind tube 1. At the same time, in order to facilitate disassembly, a handle 22 is connected to the lower bottom surface 24. The handle 22 is convenient for putting the protective cover 2 on the reserved transverse blind tube 1, or for taking the protective cover 2 off the reserved transverse blind tube 1. In order to prevent the concrete spraying from blocking the pipe opening of the reserved transverse blind tube 1, the lower bottom surface 24 is sleeved in the protective cap 3. Another solution is not to use the protective cap 3, and the lower bottom surface 24 is not penetrated by the blind tube hole 21. The lower bottom surface 24 is a complete bottom surface, and the end of the blind tube hole 21 is close to the lower bottom surface 24. This solution can also prevent the pipe opening of the reserved transverse blind tube 1 from being exposed to the outside.
[0020] To facilitate the next step of connecting the longitudinal blind pipe, the shape of the protective cover 2 can be customized. Currently, a truncated cone-shaped protective cover 2 is commonly used on construction sites. The smaller end surface of the truncated cone serves as the upper bottom surface 23, and the height of the truncated cone is no less than the length reserved for the transverse blind pipe 1. For example, using a protective cap 3, the handle 22 and the lower bottom surface 24 are integrally formed. When the handle 22 and the lower bottom surface 24 are integrally connected, the height of the protective cap 3 is greater than the height of the handle 22. This allows the protective cap 3 to cover both the handle 22 and the lower bottom surface 24 for protection. The handle 22 and the lower base 24 can also be detachably connected. The specific implementation method can be bolts or T-slots. If the handle 22 is detachable, the height requirement of the protective cap 3 only needs to be enough to cover the lower base 24. There are two handles 22 or one handle 22. When there are two handles 22, they are symmetrically arranged on the lower base 24. In this case, the outer edge width L of the handle 22 is less than (d2-d) / 2, where d is the diameter of the blind tube hole 21 and d2 is the outer diameter of the lower base 24, ensuring that the two handles 22 can be stably connected to the lower base 24. As shown in Figure 2, when there is only one handle 22, the handle 22 is arranged on the lower base 24 across the blind tube hole 21. The inner edge width L1 of the handle 22 is greater than d, where d is the diameter of the blind tube hole 21, ensuring that the handle 22 can be stably connected to the lower base 24.
[0021] The protective cover 2 is made of high-density polyethylene, which is light and easy to fix. It does not require a special base or structure and can meet the working environment of the construction site. The specific size of the protective cover 2 can be adjusted and designed according to the size required by different construction sites.
[0022] During use, a transverse blind pipe is laid in the arch frame, and the reserved transverse blind pipe 1 is exposed at both ends of the arch frame. Each reserved transverse blind pipe 1 is covered with a protective cover 2. During the covering process, the covering is quickly completed with the help of a rotating handle 22. A protective cap 3 is placed on the lower bottom surface 24. After all installation preparations are completed, concrete spraying is started. After the concrete strength reaches a level where it is solidified and not deformed, the protective cover 2 is removed. During the removal process, the protective cover 2 is also quickly removed with the help of the handle 22. The whole process avoids the destructiveness caused by secondary chiseling, protects the reserved transverse blind pipe 1 from being contaminated by concrete, and facilitates the connection of the cans for the later inverted arch lining construction. During the inverted arch lining construction, only the reserved transverse blind pipe 1 needs to be connected to the longitudinal blind pipe with a 90° elbow, and then the gap of the reserved operation is filled with mortar to prevent the large amount of concrete from being damaged and forming cavities at the joints during later construction.
[0023] The above embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
Claims
1. A protective device for a reserved deep-buried drainage blind pipe, characterized by: The protective sleeve (2) comprises a protective sleeve (2) which is sleeved on the outside of a reserved transverse blind tube (1); a blind tube hole (21) is provided at the axis of the protective sleeve (2); two end surfaces of the protective sleeve (2) are an upper bottom surface (23) and a lower bottom surface (24); the lower bottom surface (24) is connected to a handle (22) and sleeved in a protective cap (3).
2. The protective device for reserved deep-buried drainage blind pipes according to claim 1, characterized in that: The protective cover (2) is in the shape of a truncated cone, the smaller end face of the truncated cone is the upper bottom face (23), and the height of the truncated cone is not less than the length of the reserved transverse blind tube (1).
3. The protective device for reserved deep-buried drainage blind pipes according to claim 2, characterized in that: The handle (22) is integrally connected to the lower bottom surface (24) or detachably connected. When the handle (22) is integrally connected to the lower bottom surface (24), the height of the protective cap (3) is greater than the height of the handle (22).
4. The protective device for reserved deep-buried drainage blind pipes according to claim 3, characterized in that: There are two handles (22), which are symmetrically arranged on the lower bottom surface (24). The outer edge width L of the handle (22) is less than (d2-d) / 2, where d is the diameter of the blind tube hole (21) and d2 is the outer diameter of the lower bottom surface (24).
5. The protective device for reserved deep-buried drainage blind pipes according to claim 3, characterized in that: There is one handle (22), which is arranged on the lower bottom surface (24) across the blind tube hole (21). The inner edge width L1 of the handle (22) is greater than d, where d is the diameter of the blind tube hole (21).
6. The protective device for reserved deep-buried drainage blind pipes according to claim 1, characterized in that: The material of the protective cover (2) is high-density polyethylene.