Template supporting system for long-distance and variable-cross-section concrete structure box culvert

Abstract

The utility model discloses a long-distance variable cross-section concrete structure box culvert formwork supporting system which comprises an outer formwork and an inner formwork, the outer formwork comprises outer side formworks symmetrically arranged above a lower cushion layer, an upper cover plate is arranged on the two outer side formworks, and the inner formwork comprises an inner top formwork connected with the upper cover plate through a screw. The inner top template is sequentially connected with the inner side template and the inner bottom template, the end side templates are arranged on the end sides of the outer template and the inner template for sealing, the upper cover plate is a connecting channel steel, the end side templates are aluminum alloy templates, and the outer side template, the inner top template, the inner side template and the inner bottom template are formed by combining and splicing the aluminum alloy templates and the connecting channel steel. The two side plates of the connecting channel steel are connected with the aluminum alloy formwork through fasteners, and the end sides of the connecting channel steel are connected with the adjacent connecting channel steel through fasteners. One-time pouring forming of each section of the variable cross-section small box culvert is achieved, the construction time is shortened, the construction investment is reduced, and construction seam reserving, seam jointing, slab staggering and other engineering quality defects are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of box culvert construction, and particularly relates to a long-distance, variable-section concrete structure box culvert formwork support system. Background Art

[0002] When constructing a long-distance, variable-section cast-in-place concrete small water-passing box culvert, it is usually necessary to use a wooden formwork system to support the formwork system in sections according to the characteristics of the box culvert section. The construction procedure for pouring concrete is usually to pour the bottom plate and part of the side wall first, and then pour the remaining side wall and top plate after the concrete is formed. In this way, one section of the box culvert needs to be poured with concrete twice, and because the cross-section of the box culvert varies in different parts, the processed formwork cannot be used after being removed after a period of use, and further processing is required, which not only consumes a lot of time, but also generates a lot of waste, resulting in a waste of manpower and resources. In addition, in the method of using wooden formwork to first pour the bottom plate and side wall and then pour the top plate, the joints between the two pourings (construction joints) also need to be specially waterproofed, and there will be hidden dangers of leakage during future use, making maintenance difficult. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a long-distance, variable-section concrete structure box culvert formwork support system, which utilizes aluminum alloy formworks to splice into a combined customized mold for casting and forming, which can ensure construction progress, save construction costs, and improve engineering construction quality.

[0004] The technical scheme adopted by the utility model is: a long-distance, variable-section concrete structure box culvert formwork support system, including an outer formwork and an inner formwork, the outer formwork includes an outer formwork symmetrically arranged above the underlying layer, upper cover plates are arranged on the two outer formworks, the inner formwork includes an inner top formwork connected to the upper cover plate by screws, the inner top formwork is sequentially connected to the inner formwork and the inner bottom formwork, end side formworks are arranged at the end sides of the outer formwork and the inner formwork for sealing, the upper cover plate is a connecting channel steel, the end side formwork is an aluminum alloy formwork, the outer formwork, the inner top formwork, the inner formwork and the inner bottom formwork are formed by combining and splicing the aluminum alloy formwork and the connecting channel steel, the two side plates of the connecting channel steel are connected to the aluminum alloy formwork by fasteners, and the end sides of the connecting channel steel are connected to adjacent connecting channel steels by fasteners.

[0005] Furthermore, the aluminum alloy template is formed by combining and splicing aluminum alloy template unit blocks.

[0006] Furthermore, the aluminum alloy template unit blocks are connected by pins and pin sheets.

[0007] Furthermore, vibration exhaust ports are provided at intervals in the middle of the inner bottom formwork along the length direction of the box culvert, and the vibration exhaust ports are arranged on the aluminum formwork.

[0008] Furthermore, the outer formwork is fixed to the underlying layer by expansion screws.

[0009] The utility model has the following beneficial effects:

[0010] 1. The construction process is simple and the construction period is shortened. The traditional pouring construction process is: pouring the cushion layer → tying the bottom plate and side wall steel bars → supporting the formwork → pouring concrete → tying the side wall and top plate steel bars → supporting the formwork → pouring concrete; the utility model can be poured and formed in one time, and the construction process is: pouring the cushion layer → tying the bottom plate, side wall and top plate steel bars → supporting the formwork → pouring concrete. Compared with the two, the construction period is shortened by nearly half, and the labor input will be reduced accordingly.

[0011] 2. Improve the quality of the project and reduce the hidden danger of water leakage. In the traditional construction method, the joint surface of the two concrete pourings needs to be cleaned, brushed with cement slurry, and buried with water stop sheets to prevent water leakage at the construction joint during use. The utility model avoids the construction joint, reduces the hidden danger of water leakage, and improves the quality of the project.

[0012] 3. Good aesthetics after construction. When the utility model is used for construction, the pouring can be completed in one time, avoiding the engineering defects of joints and misalignment caused by pouring twice, and the surface is neat and good after the template is removed when the template is removed.

[0013] 4. At present, the traditional concrete pouring construction generally adopts the construction method of pouring the bottom plate first, and then pouring the side wall and the top plate. Using this method to pour a section of box culvert requires repeated reinforcement binding and formwork support twice, but the amount of concrete poured at one time is very small, and the construction joints produced by the two pourings are complicated to handle, and the surface is prone to quality defects such as roughness and misalignment. The use of the utility model can be cast in one time, which greatly avoids the above problems and has great improvements in quality and progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of the utility model at the connection channel steel;

[0015] Figure 2 It is a front cross-sectional view of the aluminum alloy template of the utility model;

[0016] Figure 3 It is a front view of the outer side template of the utility model;

[0017] Figure 4 It is a front view of the upper cover plate of the utility model;

[0018] Figure 5 It is a front view of the inner top template of the utility model;

[0019] Figure 6It is a front view of the inner template of the utility model;

[0020] Figure 7 It is a front view of the inner bottom template of the utility model;

[0021] Figure 8 It is a front view of the end side template of the utility model.

[0022] In the figure: 1. underlying layer; 2. outer formwork; 3. upper cover plate; 4. screw; 5. inner top formwork; 6. inner side formwork; 7. inner bottom formwork; 8. end side formwork; 9. aluminum alloy formwork unit block; 10. connecting channel steel; 11. vibrating exhaust port. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the utility model, a long-distance, variable-section concrete structure box culvert formwork support system of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 to Figure 8 As shown, a long-distance, variable-section concrete structure box culvert formwork support system includes an outer formwork and an inner formwork, the outer formwork includes an outer formwork 2 symmetrically arranged above an underlying layer 1, upper cover plates 3 are arranged on the two outer formworks 2, the inner formwork includes an inner top formwork 5 connected to the upper cover plates 3 through screws 4, the inner top formwork 5 is sequentially connected to the inner formwork 6 and the inner bottom formwork 7, and end side formworks 8 are arranged on the end sides of the outer formwork and the inner formwork for sealing, the upper cover plate is a connecting channel steel 10, and the end side formwork 8 is an aluminum alloy formwork, the outer formwork 2, the inner top formwork 5, the inner formwork 6 and the inner bottom formwork 7 are composed of an aluminum alloy formwork and a connecting channel steel 10, the two side plates of the connecting channel steel 10 are connected to the aluminum alloy formwork by fasteners, and the end sides of the connecting channel steel 10 are connected to adjacent connecting channel steels 10 by fasteners.

[0025] The formwork support system needs to select standardized aluminum alloy formworks according to the engineering characteristics for assembly and combination. In this embodiment, the aluminum alloy formwork is composed of aluminum alloy formwork unit blocks 9. For example, the box culvert sizes are 1.8*1.6m, 1.6*1.3m and 1.5*1.3m respectively. The characteristics of aluminum alloy formworks, such as high rigidity, easy assembly and strong plasticity, are fully utilized. The aluminum alloy formwork unit blocks 9 are set with non-standard templates with widths of 100mm, 200mm and 300mm. The bottom, top and sides of the box culvert formwork are spliced ​​with pins and pins to achieve the conversion of formwork systems with different cross-sections. A certain number of screw (pin) holes are left at the joints of the aluminum alloy formwork to facilitate splicing during on-site installation.

[0026] When the concrete is poured and formed in one go, the overall structure will float upward due to the buoyancy of the bottom concrete during concrete pouring. In order to prevent the overall floating, expansion screws are used to fix the outer formwork 2 to the already poured underlying layer 7 when supporting the formwork. At the same time, the slump of the poured concrete is controlled at 150±20mm to ensure that the formwork is stable during concrete pouring and that the cross-sectional size and slope meet the design requirements.

[0027] Because the joints of the aluminum alloy formwork are tightly assembled, it is difficult to check the vibration of the bottom concrete. In order to ensure that the gas inside the concrete is discharged in time during the construction of the bottom slab concrete and to check the vibration quality at the same time, a 10cm*10cm vibration exhaust port 11 is set every 0.9m on the top of the inner bottom formwork 7. When pouring concrete, a special person is arranged to vibrate the bottom slab concrete inside the box culvert to ensure the density of the bottom slab concrete and avoid quality defects such as honeycomb surface after demolding. After the inspection and construction are completed, the vibration exhaust port 11 is closed in time to avoid leakage.

[0028] In order to ensure the construction quality of the box culvert's one-time concrete pouring, the pouring sequence and vibration method of the concrete must be strictly controlled. When pouring, the bottom plate and part of the side wall are poured first, then the side wall, and finally the top plate. The pouring thickness is strictly controlled at about 30cm. After each pouring of a layer, workers are required to vibrate fully to ensure density.

[0029] The formwork system of the utility model is suitable for the concrete construction of long-distance, variable-section small box-type roofed structures with a structural height of less than 2.5m and a bottom plate thickness of less than 300mm. The formwork support system adopts a standardized aluminum alloy formwork support system to ensure the quality of vibration and the convenience of formwork support during the construction process. According to the characteristics of the cross-sectional dimensions of box culverts in different parts, the characteristics of high strength, high rigidity, easy assembly and flexible combination of aluminum alloy formwork are utilized, and different box culvert cross-sectional dimensions are achieved by adding or removing non-standard formwork on the box culvert body during formwork construction. During the construction of each section of the box culvert, the bottom plate, side wall and top plate are constructed at one time (the steel bars are tied at one time, the formwork is supported at one time, and the concrete is poured at one time). According to the particularity of the construction process, targeted technical measures are taken to focus on controlling the vibration of the bottom plate concrete during the construction process to ensure that the whole does not float during the pouring process.

[0030] The formwork system of the utility model realizes one-time casting and forming of each section of a small box culvert with a variable cross-section by adopting a combined customized mold, which not only shortens the construction time and reduces the construction investment, but also avoids the setting of construction joints and the occurrence of engineering quality defects such as joints and misalignment, conforming to the concept of green construction. Moreover, after the mold is removed, the surface is smooth and leak-free, which improves the quality of engineering construction and has a very wide range of uses.

[0031] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A long-distance, variable-section concrete box culvert formwork support system, characterized in that: The invention comprises an outer formwork and an inner formwork, wherein the outer formwork comprises an outer formwork (2) symmetrically arranged above a lower cushion layer (1), an upper cover plate (3) is arranged on the two outer formworks (2), and the inner formwork comprises an inner top formwork (5) connected to the upper cover plate (3) via a screw rod (4), the inner top formwork (5) is sequentially connected to an inner formwork (6) and an inner bottom formwork (7), and an end side formwork (8) is arranged at the end sides of the outer formwork and the inner formwork for sealing, the upper cover plate (3) is a connecting channel steel, and the end side formwork (8) is an aluminum alloy formwork, the outer formwork (2), the inner top formwork (5), the inner formwork (6) and the inner bottom formwork (7) are assembled and spliced ​​by an aluminum alloy formwork and a connecting channel steel (10), the two side plates of the connecting channel steel (10) are connected to the aluminum alloy formwork via fasteners, and the end side of the connecting channel steel (10) is connected to an adjacent connecting channel steel (10) via fasteners.

2. The long-distance, variable-section concrete structure box culvert formwork support system according to claim 1 is characterized in that: The aluminum alloy template is formed by combining and splicing aluminum alloy template unit blocks (9).

3. The long-distance, variable-section concrete box culvert formwork support system according to claim 2 is characterized in that: The aluminum alloy template unit blocks (9) are connected via pins and pin sheets.

4. The long-distance, variable-section concrete structure box culvert formwork support system according to claim 1 is characterized in that: Vibration exhaust ports (11) are provided at intervals in the middle of the inner bottom formwork (7) along the length direction of the box culvert, and the vibration exhaust ports (11) are arranged on the aluminum formwork.

5. The long-distance, variable-section concrete box culvert formwork support system according to any one of claims 1 to 4, characterized in that: The outer formwork (2) is fixed to the underlying layer (1) by means of expansion screws.

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