Anti-disengaging visible end device of tunnel secondary lining formwork

Abstract

The utility model discloses an anti-disengaging visible end device of a tunnel secondary lining formwork. The device comprises a composite steel die, a middle-buried water stop belt, a telescopic block, an alloy cushion block, an elastic body cushion block and a reinforcing grating. According to the device, by changing the structure of the top end of the end template, the visualization function of the top end of the end is achieved; in this way, constructors can visually observe whether the expected fullness degree is achieved in the concrete pouring process or not, and therefore the problem of secondary lining disengaging is effectively recognized and solved. The technical improvement is completely feasible, and the corresponding template can be reused, so that the cost is relatively low, and the economic rationality is very high; in addition, through the improvement, the construction quality and efficiency can be remarkably improved, and the safety and reliability of tunnel engineering are ensured.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a tunnel secondary lining template anti-cavitation visible end device. Background Art

[0002] In composite lining structures, voids in the secondary lining are extremely common. This phenomenon significantly alters the structural stress characteristics and increases the risk of tensile damage to the secondary lining, adversely affecting the lining's sustained load-bearing capacity. Therefore, during construction, the relevant process flow must be strictly adhered to to avoid voids in the secondary lining concrete.

[0003] In the applicant's tunnel construction practice, various secondary lining degassing prevention devices have been attempted, such as the "Tunnel Secondary Lining Void Precautionary Warning Device." The device operates as follows: sensors are installed on the waterproofing plate of each secondary lining vault. Each pouring unit is 12 meters long, and a sensor is installed every 3 meters on the upper waterproofing plate of each unit. The sensor's signal port is connected to a corresponding signal light via a network cable, which in turn is connected to a distribution box for power supply. A waterproof plate is installed on the sensor's transmission rod to expand the sensor's sensing range. The sensor is heat-welded to the waterproofing plate of each secondary lining vault via the waterproof plate at its base. When concrete pouring begins using the tunnel secondary lining trolley, as the secondary lining concrete pouring surface rises, the concrete contacts the waterproof plate on the sensor transmission rod on the tunnel vault waterproofing plate. The sensor then issues an alarm signal, which is transmitted via the network cable to the signal light. The light illuminates, signaling that the secondary lining vault concrete pouring has reached the desired density. However, during actual secondary lining construction, the device was found to be complex to install, the early warning sensors were single-use, and the cost was high. Furthermore, the limited education of frontline workers made it prone to errors or omissions during installation. Therefore, our company began searching for a low-cost and easy-to-install secondary lining anti-airflow device. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a tunnel secondary lining formwork anti-voiding visual end head device; the device realizes the visualization function of the end head top by changing the structure of the end head formwork top; in this way, construction personnel can intuitively observe whether the expected fullness is reached during the concrete pouring process, thereby effectively identifying and solving the problem of secondary lining voiding.

[0005] The utility model is realized by constructing a tunnel secondary lining template anti-emptying visible end head device, which is characterized in that: it comprises a composite steel mold, an embedded waterstop, a telescopic block, an alloy pad, an elastomer pad, and a reinforcement grid; an alloy pad is arranged below the elastomer pad, and a telescopic block is arranged below the alloy pad; a back-sticking waterstop is arranged between the outer side of the elastomer pad and the mountain rock layer; a reinforcement grid is arranged outside the alloy pad and the elastomer pad; the reinforcement grid is fixed to the composite steel mold by a reinforcement mechanism; and an embedded waterstop is arranged below the telescopic block.

[0006] According to the utility model, a tunnel secondary lining formwork anti-emptying visible end head device; the specification of the alloy pad is 50×600cm.

[0007] According to the utility model, a tunnel secondary lining formwork anti-emptying visible end head device; the specification of the elastic pad is 40×800cm.

[0008] According to the utility model, a tunnel secondary lining formwork anti-cavitation visible end device; the specification of the reinforcement grid is 50×1000cm.

[0009] The present invention has the following advantages: It provides a visual end cap device for preventing the secondary lining formwork from falling out; by modifying the structure of the end cap formwork top, the device achieves visualization of the end cap top; thus, construction workers can visually observe whether the concrete pouring process has reached the desired level of fullness, thereby effectively identifying and resolving the problem of secondary lining voids. This technical improvement is not only completely feasible, but also the corresponding formwork is reusable at a relatively low cost, making it highly economical. Furthermore, this improvement can significantly improve construction quality and efficiency, and ensure the safety and reliability of tunnel projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of this application;

[0011] Figure 2 It is the cross-section of the lining of this application;

[0012] Figure 3 yes Figure 1 Schematic diagram of the middle part.

[0013] Among them: composite steel mold 1, embedded waterstop 2, telescopic block 3, alloy pad 4, elastomer pad 5, reinforcement grid 6, back-stick waterstop 7, reinforcement mechanism 8. DETAILED DESCRIPTION

[0014] The following will be combined with the Figure 1-Figure 3This utility model is described in detail, and the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the embodiments described are only some of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility model.

[0015] The utility model provides a tunnel secondary lining template anti-emptying visible end device, such as Figure 1-Figure 3 As shown, it can be implemented in the following manner; its composition includes a composite steel mold 1, an embedded waterstop 2, a telescopic block 3, an alloy pad 4, an elastomeric pad 5, and a reinforcement grille 6; an alloy pad 4 is arranged below the elastomeric pad 5, and the telescopic block 3 is below the alloy pad 4; a back-stick waterstop 7 is arranged between the outer side of the elastomeric pad 5 and the mountain rock layer; a reinforcement grille 6 is arranged outside the alloy pad 4 and the elastomeric pad 5; the reinforcement grille 6 is fixed to the composite steel mold 1 by a reinforcement mechanism 8; an embedded waterstop 2 is arranged below the telescopic block 3.

[0016] The alloy pad has a specification of 50×600 cm.

[0017] The specification of the elastic pad is 40×800 cm.

[0018] The specification of the reinforcement grid is 50×1000cm.

[0019] This application achieves visualization of the top of the end formwork by innovatively changing its structure. This allows construction workers to visually observe whether the concrete pouring process has reached the desired level of fullness, effectively identifying and resolving the issue of voids in the secondary lining. This technical improvement is not only completely feasible, but also highly economical given the reusable formwork at a relatively low cost. Furthermore, this improvement can significantly improve construction quality and efficiency, while ensuring the safety and reliability of tunnel projects.

[0020] The configuration scheme for the buried water stop at 25cm and the secondary lining concrete at 50cm thickness in this application is composed of a new polymer composite steel mold, telescopic blocks, alloy pads, elastomer pads, and reinforcement grids. The sealing requirements are achieved by adjusting the jacking of the blocks. Different lining thicknesses can achieve the sealing requirements by adding or reducing pads of corresponding sizes.

[0021] The lap joint of the adjusting block is 2cm and can be adjusted (raised) by 6. The lifting of the adjusting block can ensure that it is tightly attached to the water stop and there is no leakage.

[0022] On-site installation needs to be carried out from the arch position to both sides, leaving insufficient space for installing the entire adjustment block at the low side wall. The gaps are sealed and reinforced with wooden formwork according to actual conditions. Except for the telescopic block, the remaining pads can be sawed to the appropriate size according to actual requirements.

[0023] The adjustment block is used for this type of trolley. The gap between the arc fit and the joints does not exceed 2mm (the adjustment block overlaps the joint by 20mm), which can meet the use requirements.

[0024] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunnel secondary lining formwork anti-emptying visible end device, characterized by: The invention comprises a composite steel mold (1), an embedded waterstop (2), a telescopic block (3), an alloy pad (4), an elastomer pad (5), and a reinforcement grid (6); an alloy pad (4) is arranged below the elastomer pad (5), and the telescopic block (3) is arranged below the alloy pad (4); a back-sticking waterstop (7) is arranged between the outer side of the elastomer pad (5) and the mountain rock layer; a reinforcement grid (6) is arranged outside the alloy pad (4) and the elastomer pad (5); the reinforcement grid (6) is fixed to the composite steel mold (1) through a reinforcement mechanism (8); and an embedded waterstop (2) is arranged below the telescopic block (3).

2. A tunnel secondary lining formwork anti-emptying visible end device according to claim 1, characterized in that: The alloy pad (4) has a size of 50×600 cm.

3. The tunnel secondary lining formwork anti-emptying visible terminal device according to claim 1, characterized in that: The elastic pad (5) has a specification of 40×800 cm.

4. The tunnel secondary lining formwork anti-emptying visible terminal device according to claim 1, characterized in that: The specification of the reinforcement grid (6) is 50×1000 cm.

Images