Non-dismantling formwork for tunnel reinforcement

Abstract

The utility model discloses a non-dismantling formwork for tunnel reinforcement, which belongs to the technical field of tunnel non-dismantling formworks and comprises a first prefabricated formwork, a second prefabricated formwork and a third prefabricated formwork. The second prefabricated formworks are used for reinforcing the upper portion of the tunnel, a plurality of tunnel segments are arranged on the inner wall of the tunnel, the second prefabricated formworks are sequentially installed on the tunnel segments in the middle of the tunnel, and the first prefabricated formworks are sequentially installed on the tunnel segments at the bottom of the tunnel. A grouting groove is formed among the first prefabricated formwork, the second prefabricated formwork and the tunnel segment in a surrounding mode, and a reinforcing mesh and a cement mortar layer are arranged in the grouting groove. The first prefabricated formwork and the second prefabricated formwork are designed to form a formwork structure which does not need to be disassembled, and the problems that when a tunnel formwork needs to be disassembled in a traditional grouting reinforcing method, the construction area is occupied, the construction time is prolonged, and potential safety hazards exist in construction are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel formwork that does not require dismantling, and in particular relates to a formwork that does not require dismantling for tunnel reinforcement. Background Technology

[0002] Tunnel formwork is a large-scale, standardized formwork system used in tunnel engineering or similar underground structure construction. It features stable structure, reusability, high construction efficiency, and strong adaptability.

[0003] While tunnel formwork plays a crucial role in tunnel construction, it needs to be dismantled after use. This process significantly impacts vehicle traffic, specifically in the following aspects:

[0004] 1. Occupation of construction area: During the dismantling of tunnel formwork, various mechanical equipment such as cranes and forklifts are required, which occupy a large amount of space inside the tunnel. Lanes originally used for vehicle traffic are occupied by construction equipment and dismantled formwork components, making it impossible for vehicles to pass normally. In some urban subway tunnel construction, formwork dismantling operations may last for several days, during which some sections of the tunnel are completely closed, and vehicles can only detour via other routes, increasing traffic pressure and transportation costs.

[0005] Second, it increases construction time. The dismantling of tunnel formwork is a complex process that requires strict adherence to operating procedures to ensure construction safety and the integrity of the formwork. This includes multiple steps such as formwork disassembly, hoisting, and cleaning, each of which requires a certain amount of time. If unexpected situations such as formwork jamming or component damage occur, the dismantling time will be further extended. The extended construction period means that the time when vehicles are blocked will also increase, causing long-term adverse effects on traffic.

[0006] Third, there are potential safety hazards during construction. The dismantling of tunnel formwork presents certain safety risks, such as falling formwork components and crane overturning. These hazards not only threaten construction workers but may also endanger the safety of passing vehicles. Utility Model Content

[0007] The purpose of this utility model is to solve the problems of existing tunnel formwork occupying construction area, increasing construction time and posing construction safety hazards, and to propose a non-removable formwork for tunnel reinforcement.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: a non-removable template for tunnel reinforcement, comprising:

[0009] First precast formwork used for tunnel bottom reinforcement;

[0010] The tunnel is reinforced with a second precast template for the upper part of the tunnel. Several tunnel segments are provided on the inner wall of the tunnel. The second precast template is installed sequentially on the tunnel segments in the middle of the tunnel. The first precast template is installed sequentially on the tunnel segments at the bottom of the tunnel. A grouting groove is formed between the first precast template, the second precast template and the tunnel segments. The grouting groove is provided with a steel mesh and a cement mortar layer.

[0011] As a further description of the above technical solution:

[0012] Several tunnel segments are arranged in a ring.

[0013] As a further description of the above technical solution:

[0014] The first precast template is provided with several first ceramic nut reserved holes and second anchor bolt fixing holes.

[0015] As a further description of the above technical solution:

[0016] The second precast template is provided with several reserved holes for second ceramic nuts, first anchor bolt fixing holes and first grouting reserved holes.

[0017] As a further description of the above technical solution:

[0018] A removable plug is provided on the first grouting pre-reserved hole.

[0019] As a further description of the above technical solution:

[0020] Vent holes may be provided on the tunnel segments located at the top of the tunnel as needed.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0022] 1. In this utility model, several first precast templates are installed on the tunnel segments at the bottom of the tunnel, and several second precast templates are installed on the tunnel segments in the middle of the tunnel. A grouting groove is formed between the first precast templates, the second precast templates, and the tunnel segments. During construction, grouting is carried out through the first grouting reserved hole. When the cement mortar flows out from the air vent at the top of the tunnel segment, the grouting groove is filled. After the cement mortar solidifies, the first precast template, the second precast template, and the tunnel segments together form a tunnel reinforcement structure. This avoids the problems of occupying construction area, increasing construction time, and posing construction safety hazards after dismantling the templates in traditional tunnel reinforcement.

[0023] 2. In this utility model, before grouting, the first precast template and the second precast template are attached to the screws on the tunnel segments and fixed to the tunnel segments by nuts and anchors, which greatly improves the stability of the overall structure during subsequent grouting. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This refers to the usage state of a non-removable formwork for tunnel reinforcement. Figure 1 .

[0026] Figure 2 This is a perspective view of the second prefabricated template in a tunnel reinforcement non-removable template.

[0027] Figure 3 This is a three-dimensional view of the first prefabricated template in a tunnel reinforcement non-removable template.

[0028] Figure 4 This refers to the usage state of a non-removable formwork for tunnel reinforcement. Figure 2 .

[0029] Figure 5 This is a schematic diagram of the structure of the first prefabricated template in a tunnel reinforcement template that does not require dismantling.

[0030] Figure 6 This is a schematic diagram of the structure of the second prefabricated template in a tunnel reinforcement non-removable template.

[0031] Legend:

[0032] 1-First precast template; 2-Second precast template; 3-Tunnel segment; 4-Grouting groove; 5-Cement mortar layer; 6-First ceramic nut reserved hole; 7-First anchor bolt fixing hole; 8-Second anchor bolt fixing hole; 9-Second ceramic nut reserved hole; 10-First grouting reserved hole. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] 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.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of this utility model, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Please see Figure 1-6 This utility model provides a technical solution: a non-removable template for tunnel reinforcement, comprising:

[0040] First precast template 1 for reinforcing the bottom of the tunnel;

[0041] The tunnel is reinforced with a second precast template 2 in the middle of the tunnel. Several tunnel segments 3 are provided on the inner wall of the tunnel. The second precast template 2 is installed sequentially on the tunnel segments 3 in the middle of the tunnel. The first precast template 1 is installed sequentially on the tunnel segments 3 at the bottom of the tunnel. The first precast template 1, the second precast template 2 and the tunnel segments 3 form a grouting groove 4. The grouting groove 4 is provided with a steel mesh and a cement mortar layer 5.

[0042] Several tunnel segments 3 are arranged in a ring to form a enclosure. This ensures that the enclosure matches the inner wall of the tunnel, improving the stability of the subsequent installation of the first and second precast templates on the tunnel segments.

[0043] The first precast template 1 is provided with several first ceramic nut reserved holes 6 and second anchor bolt fixing holes 8.

[0044] The second precast template 2 is provided with several second ceramic nut reserved holes 9, first anchor bolt fixing holes 7 and first grouting reserved holes 10.

[0045] The first grouting pre-reserved hole 10 is equipped with a removable plug. When encountering a tunnel with a high elevation, segmented grouting is adopted. When the elevation is not high, the first grouting pre-reserved hole on the second precast template at the higher position is plugged, and grouting starts from the first grouting pre-reserved hole on the second precast template at the bottom, thereby improving applicability.

[0046] The second precast template located at the top of the tunnel can be equipped with vents as needed. These vents are used to release air during grouting and also to determine whether the grouting is complete based on the state of the grout fluid at the vents.

[0047] Working principle: Several first precast templates are installed at the bottom of the tunnel segments, and several second precast templates are installed at the top of the tunnel segments. A grouting groove is formed between the first and second precast templates and the tunnel segments. When construction is required, grouting is carried out through the first grouting reserved hole. When the cement mortar flows out from the air vent at the top of the tunnel segments, the grouting groove is filled. After the cement mortar solidifies, the first and second precast templates and the tunnel segments together form a tunnel reinforcement structure. This avoids the problems of occupying construction area, increasing construction time, and posing construction safety hazards caused by dismantling tunnel templates after traditional tunnel reinforcement.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-removable formwork for tunnel reinforcement, characterized in that, include: First precast formwork used for tunnel bottom reinforcement; The tunnel is reinforced with a second precast template for the upper part of the tunnel. The inner wall of the tunnel is provided with a plurality of tunnel segments. The second precast template is installed sequentially on the tunnel segments in the middle of the tunnel. The first precast template is installed sequentially on the tunnel segments at the bottom of the tunnel. A grouting groove is formed between the first precast template, the second precast template and the tunnel segments. The grouting groove is provided with a steel mesh and a cement mortar layer.

2. The tunnel reinforcement formwork that does not require dismantling according to claim 1, characterized in that, Several tunnel segments are arranged in a ring.

3. The tunnel reinforcement formwork that does not require dismantling according to claim 2, characterized in that, The first precast template is provided with several first ceramic nut reserved holes and second anchor bolt fixing holes.

4. The tunnel reinforcement formwork that does not require dismantling according to claim 1, characterized in that, The second precast template is provided with several reserved holes for second ceramic nuts, first anchor bolt fixing holes and first grouting reserved holes.

5. The tunnel reinforcement formwork that does not require dismantling according to claim 4, characterized in that, A removable plug is provided on the first grouting pre-reserved hole.

6. The tunnel reinforcement formwork that does not require dismantling according to claim 1, characterized in that, Vent holes are provided on the tunnel segments located at the top of the tunnel.

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