Tunnel longitudinal blind pipe back-up auxiliary positioning device

Abstract

The utility model relates to a tunnel construction technical field, concretely is a kind of tunnel longitudinal blind pipe counter wrapping auxiliary positioning device, it includes tunnel primary support and the waterproof board on its upper portion is attached to tunnel primary support, longitudinal blind pipe is installed on tunnel primary support by positioning structure, when waterproof board counter wrapping is carried out to longitudinal blind pipe, the bottom end of waterproof board is lifted by lifting structure, and waterproof board and longitudinal blind pipe are pressed tightly by auxiliary pressing structure and are pressed tightly attached;Positioning structure includes two positioning rods with longitudinal blind pipe and left and right distribution and is set same direction, longitudinal blind pipe is placed on two positioning rods, and longitudinal blind pipe and two positioning rods are mutually attached, the front end and rear end of two positioning rods are fixedly installed with positioning plate in common;The embedded bar is provided on the tunnel primary support, and two positioning plates are respectively fixedly connected with corresponding embedded bar;By positioning structure, lifting structure and auxiliary pressing structure ensure longitudinal blind pipe linear elevation, gradient meets design requirement, avoid positioning deviation.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a longitudinal blind pipe reverse wrapping auxiliary positioning device for tunnels. Background Technology

[0002] During the construction of longitudinal blind pipes in tunnels, a full-width waterproof slab (2.5m or 3m wide and 12m long) needs to be used to wrap the longitudinal blind pipes. Current construction methods rely on manual labor, which presents the following core problems: (1) Poor positioning accuracy of longitudinal blind pipe and poor back-wrapping quality: The whole waterproof membrane is heavy and the workers are prone to pulling and shifting when back-wrapping it upwards, which causes the already positioned longitudinal blind pipe to have problems such as linear distortion and slope deviation exceeding the design requirements, affecting the tunnel drainage effect; the waterproof membrane at the upper part of the longitudinal blind pipe is difficult to press tightly, and the lower waterproof membrane does not adhere to the rock wall, resulting in the waterproof membrane being detached behind, affecting the quality of subsequent lining construction.

[0003] (2) Difficulty in controlling the quality of waterproofing membrane installation: When the workers lift the waterproofing membrane, they cannot accurately control the top elevation, which causes the entire waterproofing membrane to be tilted and the joint height difference between adjacent waterproofing membranes to be large. During subsequent hot-melt welding, it is easy to have missed welds, false welds, and poor welding quality. The surface flatness of the waterproofing membrane is poor, and it is easy to have wrinkles and hollows, which affects the subsequent lining construction.

[0004] (3) Low construction efficiency and high labor intensity: The installation of longitudinal blind pipe reverse wrapping and waterproof membrane positioning requires 4-5 workers to work together, which takes about 1.5 hours. During the lifting process, the uneven force is likely to cause poor installation quality of the waterproof membrane, resulting in a high rework rate.

[0005] There is a lack of auxiliary devices specifically designed to address the above problems in the existing technology. Therefore, it is necessary to invent an auxiliary positioning device for reverse wrapping of longitudinal blind pipes in tunnels to solve the above problems. Utility Model Content

[0006] To address the problems of poor positioning accuracy, poor wrapping quality, difficulty in controlling the installation quality of waterproof membrane, low construction efficiency, and high labor intensity in existing manual longitudinal blind pipe wrapping operations, this utility model provides an auxiliary positioning device for longitudinal blind pipe wrapping in tunnels.

[0007] This utility model is achieved using the following technical solution: A tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device includes a tunnel primary support and a waterproof membrane attached to the upper part of the tunnel primary support. A longitudinal blind pipe is installed on the tunnel primary support through a positioning structure. When the waterproof membrane wraps around the longitudinal blind pipe, the bottom end of the waterproof membrane is lifted by a lifting structure, and the waterproof membrane and the longitudinal blind pipe are pressed and attached by an auxiliary pressing structure. The positioning structure includes two positioning rods arranged in the same direction as the longitudinal blind pipe and distributed to the left and right. The longitudinal blind pipe is placed on the two positioning rods, and the longitudinal blind pipe and the two positioning rods are in close contact with each other. The front end and rear end of the two positioning rods are fixedly installed with positioning plates. The tunnel initial support is provided with embedded bars, and the two positioning plates are fixedly connected to the corresponding embedded bars respectively.

[0008] Furthermore, the lifting structure includes two lifting plates, with the bottom end of the waterproof plate sandwiched between the two lifting plates. The left and right ends of the two lifting plates are provided with corresponding left and right fixing holes. Fixing bolts are threaded through the two left and two right fixing holes, and the other end of the fixing bolts is threaded with a fixing nut. Lifting rings are fixedly connected to the middle of the two lifting plates.

[0009] Furthermore, the lifting structure also includes a lifting device installed on the tunnel's initial support and located above the top elevation line of the waterproof membrane, with a lifting chain and a lifting ring connected on the lifting device.

[0010] Furthermore, the auxiliary clamping structure includes an L-shaped clamping plate, and connecting sleeves in the same direction as the longitudinal blind tube are fixedly connected to the surface of the horizontal part and the surface of the vertical part of the clamping plate. Fixing sleeves in the same direction as the longitudinal blind tube are fixedly connected to the side walls of the two positioning rods.

[0011] Furthermore, the auxiliary clamping structure also includes a U-shaped clamp, one end of which is clamped inside the connecting sleeve and the other end of which is clamped inside the fixed sleeve, for fixing adjacent connecting sleeves and fixed sleeves; or one end of the U-shaped clamp is clamped inside the connecting sleeve and the other end of which is clamped inside the connecting sleeve adjacent to it, for fixing two adjacent connecting sleeves.

[0012] Furthermore, the number of clamping plates is two.

[0013] Furthermore, a rubber gasket is fixed to the side of the lifting plate near the waterproof plate.

[0014] This utility model features a reasonable and reliable structural design. Through positioning, lifting, and auxiliary clamping structures, it ensures that the longitudinal blind pipe alignment, elevation, and slope meet design requirements, preventing positioning deviations and improving the quality of the back-wrapping. Simultaneously, it ensures that the deviation of the top elevation of the waterproof membrane is ≤1cm, guaranteeing consistent joint height and a first-time weld quality pass rate of ≥98%, reducing issues related to the flatness of the waterproof membrane surface. Furthermore, it reduces the number of workers required for a single section of construction to 2-3 people, shortens construction time to within 40 minutes, and reduces labor intensity, thereby improving construction efficiency and resource utilization. It also has the advantages of being reusable and repositionable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the positioning structure in this utility model.

[0017] Figure 3 This is a schematic diagram of the lifting structure in this utility model.

[0018] Figure 4 This is a schematic diagram of the auxiliary pressing structure in this utility model.

[0019] Figure 5 This is a schematic diagram illustrating the usage process of this utility model.

[0020] In the diagram: 1-Tunnel initial support, 2-Waterproof membrane, 3-Longitudinal blind pipe, 4-Positioning rod, 5-Positioning plate, 6-Lifting plate, 7-Left fixing hole, 8-Right fixing hole, 9-Lifting ring, 10-Pressure plate, 11-Connecting sleeve, 12-Fixing sleeve, 13-U-shaped clamp, 14-Bagged gravel. Detailed Implementation

[0021] A tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device, as shown in the attached figure. Figure 1 Appendix Figure 2 As shown; including the tunnel initial support 1 and the waterproof membrane 2 attached to the tunnel initial support 1. A longitudinal blind pipe 3 is installed on the tunnel initial support 1 through a positioning structure. When the waterproof membrane 2 wraps around the longitudinal blind pipe 3, the bottom end of the waterproof membrane 2 is lifted by a lifting structure, and the waterproof membrane 2 and the longitudinal blind pipe 3 are pressed and attached by an auxiliary pressing structure. The positioning structure includes two positioning rods 4 arranged in the same direction as the longitudinal blind pipe 3 and distributed to the left and right. The longitudinal blind pipe 3 is placed on the two positioning rods 4, and the longitudinal blind pipe 3 and the two positioning rods 4 are in close contact with each other. The front end and the rear end of the two positioning rods 4 are fixedly installed with positioning plates 5. The tunnel initial support 1 is provided with embedded bars, and the two positioning plates 5 are fixedly connected to the corresponding embedded bars.

[0022] In this invention, the positioning structure and pre-embedded reinforcing bars ensure accurate positioning of the longitudinal blind pipe 3 during installation. The lifting structure ensures the flatness of the waterproof membrane 2 when wrapping the longitudinal blind pipe 3, guaranteeing consistent joint height and thus ensuring welding quality. The auxiliary pressing structure ensures that the waterproof membrane 2 fits snugly against the longitudinal blind pipe 3 and the tunnel initial support 1 after wrapping. Furthermore, the positioning structure, lifting structure, and auxiliary pressing structure are all simple and easy to operate, allowing for quick installation and disassembly, greatly reducing manpower, shortening construction time, improving construction efficiency, and lowering labor intensity. They are also reusable, improving resource utilization.

[0023] As attached Figure 3As shown; the lifting structure includes two lifting plates 6, the bottom end of the waterproof plate 2 is sandwiched between the two lifting plates 6, and the left and right ends of the two lifting plates 6 are provided with corresponding left fixing holes 7 and right fixing holes 8. Fixing bolts are passed through the two left fixing holes 7 and the two right fixing holes 8, and the other end of the fixing bolts is threaded with a fixing nut; a lifting ring 9 is fixedly connected to the middle of the two lifting plates 6.

[0024] The lifting structure also includes a lifting device installed on the tunnel initial support 1 and located above the top elevation line of the waterproof slab 2, with the lifting chain on the lifting device connected to the lifting ring 9.

[0025] The combined structure design of the lifting plate 6, lifting ring 9, and lifting equipment enables the overall lifting of the lower part of the waterproof membrane 2, freeing up manpower and ensuring the flatness of the waterproof membrane 2 during the lifting process, thereby ensuring the welding quality.

[0026] As attached Figure 4 As shown; the auxiliary clamping structure includes an L-shaped clamping plate 10, and a connecting sleeve 11 in the same direction as the longitudinal blind tube 3 is fixedly connected to both the horizontal and vertical surfaces of the clamping plate 10. A fixing sleeve 12 in the same direction as the longitudinal blind tube 3 is fixedly connected to the side walls of both positioning rods 4.

[0027] As attached Figure 5 As shown; the auxiliary clamping structure also includes a U-shaped clamp 13, one end of which is clamped in the connecting sleeve 11 and the other end is clamped in the fixing sleeve 12, for fixing adjacent connecting sleeves 11 and fixing sleeves 12; or one end of the U-shaped clamp 13 is clamped in the connecting sleeve 11 and the other end is clamped in the connecting sleeve 11 adjacent to it, for fixing two adjacent connecting sleeves 11.

[0028] The structural design of the clamping plate 10, connecting sleeve 11, fixing sleeve 12 and U-shaped clamp 13 makes the auxiliary clamping structure a flexible component that can be disassembled and connected, realizing the temporary fixation of the waterproof plate 2 and the longitudinal blind pipe 3. It is easy to operate and can be quickly installed and disassembled; at the same time, it can be reused.

[0029] As attached Figure 5 As shown; the number of clamping plates 10 is two.

[0030] A rubber gasket is fixed to the side of the lifting plate 6 near the waterproof plate 2.

[0031] During the work, the surveying and layout personnel first conduct surveying and layout to determine the longitudinal blind pipe positioning line; Then, the pre-embedded bars are fixed on the tunnel initial support 1 so that the pre-embedded bars are located below the longitudinal blind pipe positioning line, and a lifting device (manual hoist) is installed on the side wall of the tunnel initial support 1. Next, the waterproof membrane 2 is fixed on the side wall of the tunnel initial support 1 using rivets and pressure strips, so that the upper part of the waterproof membrane 2 is attached to the tunnel initial support 1, while the lower part of the waterproof membrane 2 hangs freely. The lower part of the waterproof membrane 2 is clamped by two lifting plates 6. Then, the lifting chain on the lifting equipment is connected to the lifting ring 9 and suspended for later use. Next, the embedded reinforcing bar is fixedly connected to the positioning plate 5, so that the positioning plate 5 and the positioning rod 4 are located below the longitudinal blind pipe positioning line; Then, the longitudinal blind pipe 3 is placed on the two positioning rods 4, and bagged gravel 14 is placed on the longitudinal blind pipe 3. Then, the operator manually operates the lifting device (manual hoist) to lift the lower part of the waterproof membrane 2 upward, so that the longitudinal blind pipe 3 is wrapped by the waterproof membrane 2. After the lower part of the waterproof membrane 2 is lifted to a certain height, the workers press the waterproof membrane 2 against the tunnel side wall, wrap and tighten the longitudinal blind pipe 3, and then fasten the two clamping plates 10 onto the waterproof membrane 2 that wraps the longitudinal blind pipe 3. Then, use the U-shaped clamp 13 to connect the adjacent connecting sleeve 11 and the fixing sleeve 12, or two adjacent connecting sleeves 11, to press and fix the reverse wrapping position. Finally, the subsequent welding work is carried out. After the welding is completed, the lifting structure and auxiliary clamping structure are removed, and the next section of longitudinal blind pipe reverse wrapping work is carried out.

[0032] In practice, the lifting device is a manual hoist. In the lifting structure, the lifting plate 6 is made of a rectangular steel plate with a length of 60cm, a width of 30cm, and a thickness of 8-10mm, and the rubber gasket has a thickness of 3-5mm. The diameter of the left fixing hole 7 and the right fixing hole 8 is 12mm, and they are fitted with M10 fixing bolts. The thickness of the waterproof plate 2 is 1.5-3mm.

[0033] In the positioning structure, the positioning rod 4 is made of a seamless steel pipe with a length of 2m, a diameter of 42mm, and a wall thickness of 3.5mm; the positioning plate 5 is made of angle steel with a model number of 50*50*5mm; and the embedded reinforcement is made of threaded steel with a diameter of 14mm, extending into the tunnel initial support 1 to a depth greater than 10cm. The positioning rod 4 is located 10-15cm directly below the longitudinal blind pipe positioning line.

[0034] In the auxiliary clamping structure, the clamping plate 10 is made of angle steel with a model number of 50*50*5mm and a length of 20cm, and the inner diameter of the connecting sleeve 11 and the fixing sleeve 12 is 18mm. The U-shaped clamp 13 is made of round steel with a diameter of 8mm.

[0035] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device, characterized in that: Includes the tunnel initial support (1) and the waterproof membrane (2) attached to the tunnel initial support (1) above it. A longitudinal blind pipe (3) is installed on the tunnel initial support (1) through a positioning structure. When the waterproof membrane (2) wraps around the longitudinal blind pipe (3), the bottom end of the waterproof membrane (2) is lifted by a lifting structure, and the waterproof membrane (2) and the longitudinal blind pipe (3) are pressed and attached by an auxiliary pressing structure. The positioning structure includes two positioning rods (4) arranged in the same direction as the longitudinal blind pipe (3) and distributed to the left and right. The longitudinal blind pipe (3) is placed on the two positioning rods (4), and the longitudinal blind pipe (3) and the two positioning rods (4) are in close contact with each other. The front end and the rear end of the two positioning rods (4) are fixedly installed with positioning plates (5). The tunnel initial support (1) is provided with embedded bars, and the two positioning plates (5) are fixedly connected to the corresponding embedded bars respectively.

2. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 1, characterized in that: The lifting structure includes two lifting plates (6), and the bottom end of the waterproof plate (2) is sandwiched between the two lifting plates (6). The left and right ends of the two lifting plates (6) are provided with corresponding left fixing holes (7) and right fixing holes (8). Fixing bolts are passed through the two left fixing holes (7) and the two right fixing holes (8). The other end of the fixing bolts is threaded with a fixing nut. The middle part of the two lifting plates (6) is fixedly connected with a lifting ring (9).

3. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 2, characterized in that: The lifting structure also includes a lifting device installed on the tunnel primary support (1) and located above the top elevation line of the waterproof membrane (2), with the lifting chain on the lifting device connected to the lifting ring (9).

4. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 1, characterized in that: The auxiliary clamping structure includes an L-shaped clamping plate (10). The horizontal and vertical surfaces of the clamping plate (10) are fixedly connected with connecting sleeves (11) in the same direction as the longitudinal blind tube (3). The side walls of the two positioning rods (4) are fixedly connected with fixing sleeves (12) in the same direction as the longitudinal blind tube (3).

5. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 4, characterized in that: The auxiliary clamping structure also includes a U-shaped clamp (13), one end of which is clamped in the connecting sleeve (11) and the other end is clamped in the fixing sleeve (12) for fixing adjacent connecting sleeves (11) and fixing sleeves (12); or one end of the U-shaped clamp (13) is clamped in the connecting sleeve (11) and the other end is clamped in the connecting sleeve (11) adjacent to it for fixing two adjacent connecting sleeves (11).

6. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 4, characterized in that: The number of clamping plates (10) is two.

7. The tunnel longitudinal blind pipe reverse wrapping auxiliary positioning device according to claim 2, characterized in that: A rubber gasket is fixed to the side of the lifting plate (6) near the waterproof plate (2).

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