Prefabricated concrete pouring combined formwork

Abstract

The utility model relates to a prefabricated concrete pouring combined formwork which comprises a concrete pouring formwork, an inner cavity which is made of steel according to the size and shape of a concrete member to be poured and matched with the specific shape, and a reinforcement cage and an embedded part which are used for restraining concrete are arranged in the inner cavity. And the geotechnical cloth is arranged on the wall surface of the inner cavity of the concrete pouring template and is provided with warps and wefts for guiding gas to be discharged. And one side, in contact with the concrete, of the geotechnical cloth is uniformly coated with a release agent convenient for demolding the concrete. Compared with the prior art, the cast precast concrete tower drum surface hole, honeycomb and pitted surface phenomena can be effectively reduced, the follow-up repair workload is reduced, the structure is simple and reliable, the cost is low, the construction is convenient, the common quality problems of concrete tower drum casting are effectively reduced, and the quality stability of precast concrete drum pieces is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power towers, in particular to a prefabricated concrete pouring combined template. Background Art

[0002] Wind turbine towers are an important component of wind turbine generators. In recent years, concrete towers have been increasingly used in wind power generation due to their low construction cost, good corrosion resistance, and excellent fatigue resistance.

[0003] The size of the template for pouring concrete tower tube segments is large. During the pouring and vibration process, the exhaust distance of the air pores inside the concrete is long. The bubbles are easily adsorbed on the surface of the template and difficult to be discharged. As a result, there are holes, honeycombs and rough surfaces on the concrete surface after pouring, which affects the final quality and appearance of the precast concrete tower tube segments and creates safety hazards for the wind turbine. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide a precast concrete pouring composite template.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A precast concrete pouring composite formwork, the composite formwork comprising:

[0007] The concrete pouring formwork has an inner cavity that matches the size and shape of the concrete component to be poured, and a steel cage and embedded parts are arranged in the inner cavity to constrain the concrete;

[0008] The geotextile is arranged on the inner wall of the steel formwork and has warp and weft lines for guiding the gas discharge.

[0009] As a preferred technical solution, the side of the geotextile in contact with the concrete is evenly coated with a release agent to facilitate the demoulding of the concrete.

[0010] As a preferred technical solution, the geotextile is arranged on the wall surface on one side of the inner cavity of the casting template.

[0011] As a preferred technical solution, the geotextile is arranged on multiple wall surfaces of the inner cavity of the casting template.

[0012] As a preferred technical solution, the geotextile is made of synthetic fiber material.

[0013] As an optimal technical solution, the casting formwork is a spliced ​​horizontal tube sheet formwork.

[0014] As an optimal technical solution, the casting formwork is a spliced ​​vertical tube sheet formwork.

[0015] As an optimal technical solution, the casting template is a metal plate.

[0016] As an optimal technical solution, the casting template is made of steel plate or aluminum plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The utility model arranges a geotextile with longitude and latitude lines on the inner wall of the concrete casting composite formwork, which guides the gas to be discharged during concrete vibration to reduce the holes, honeycombs and rough surfaces on the surface of the cast precast concrete tower, thereby reducing the workload of subsequent repairs.

[0019] 2) The setting of geotextile facilitates the cleaning of the inner surface of the concrete casting formwork. The contact surface between the geotextile and the concrete is evenly coated with a release agent to improve the utilization efficiency of the casting formwork.

[0020] 3) The utility model has a reasonable solution of setting geotextile in the template, simple and reliable structure, low cost, convenient construction, effectively reduces the common quality problems of concrete tower casting, and ensures the stable quality of precast concrete tube segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a horizontal fan concrete tower casting composite formwork according to the present invention;

[0022] Figure 2 This is a partial structural diagram of the combined formwork for concrete pouring of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the composite formwork for pouring the concrete tower of a vertical wind turbine of the present utility model;

[0024] The numbers in the figure indicate: 1. Concrete pouring formwork, 2. Geotextile. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0027] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0028] Example 1

[0029] The utility model provides a combined formwork for pouring concrete, which solves the problems of holes, honeycombs and rough surfaces on the outer surface of concrete after pouring, and improves the molding quality and aesthetics of poured concrete.

[0030] like Figure 1 As shown in FIG, one of the implementation examples of the combined formwork for concrete pouring of the present invention is shown, the combined formwork includes a pouring formwork 1 and a geotextile 2.

[0031] Among them, the casting formwork 1 can adopt spliced ​​vertical and horizontal cylinder formwork, which is made of steel into a specific shape according to the size and shape of the concrete component, and is used to place the steel cage and constrain the concrete; the geotextile 2 is arranged on the inner wall of the steel formwork 1, and is made of a synthetic fiber material that is breathable and leak-proof, and has longitude and latitude lines for guiding gas discharge, and the release agent is evenly applied on the concrete contact surface.

[0032] Figure 1 The middle casting template 1 adopts the spliced ​​horizontal cylinder template. First, the steel bars and embedded parts arranged inside the concrete are tied together, and the concrete casting template 1 that meets the casting requirements is spliced ​​and combined. Figure 2 As shown, a geotextile 2 is laid on the inner side of the formwork and stretched flat to keep the surface wrinkle-free. Concrete is poured and vibrated according to construction requirements. After standing for a period of time, the concrete pouring formwork 1 and geotextile 2 are removed in sequence to carry out the concrete component curing process. The combined formwork used in this utility model can guide the bubbles out through the longitude and latitude lines of the geotextile 2 when the concrete is vibrated. It has a simple and reliable structure and low cost. It can significantly reduce the holes, honeycombs and roughness on the concrete surface, improve the density of the concrete surface, and facilitate the cleaning of the inner surface of the formwork, thereby improving the utilization efficiency of the formwork, and has obvious technical and economic advantages.

[0033] Optionally, the concrete pouring template 2 may be a metal steel plate or aluminum plate.

[0034] Optionally, the geotextile 2 used for laying can be other flexible materials that are air-permeable, water-permeable, and leak-proof.

[0035] Optionally, a release agent may be evenly applied to the surface of the geotextile 2 in contact with the concrete to facilitate demoulding of the concrete.

[0036] Optionally, in order to improve the quality and visual effect of a specific side, a corresponding single-side geotextile 2 may be provided only on the inner wall of the casting formwork 1 .

[0037] The specific process of using the above-mentioned combined formwork for the horizontal wind turbine concrete tower for construction is as follows:

[0038] For the horizontal wind turbine concrete tower casting process, the site is first leveled, and the steel cage and embedded components are arranged. The concrete tower shell formwork is assembled, and a geotextile is laid along the inner wall of the formwork. The concrete is poured, the cover is vibrated, and after standing for 12 hours, the formwork and geotextile are removed in sequence for curing.

[0039] The steel cage and embedded components must be bundled and installed according to design requirements, and securely fixed to prevent displacement during concrete vibration. The steel bars must be free of oil stains and debris. Upon completion, an appearance and precision inspection must be conducted to ensure that the precision of each individual component meets the requirements for final assembly.

[0040] Before splicing the concrete formwork 1, the inner surface of the mold cavity needs to be cleaned and inspected. After splicing, the mold needs to be closed, paying special attention to checking the screw holes, bolts and joints on the surface of the steel mold.

[0041] When laying geotextile 2, use a breathable and leak-proof synthetic fiber material, apply a release agent evenly on the concrete contact surface, and arrange it on the surface of the mold cavity.

[0042] The release agent should be applied according to the local climate environment and concrete requirements.

[0043] After pouring, scrape off excess concrete with a scraper and smooth the surface along the steel formwork to achieve a smooth and dense finish. Depending on the season, let the concrete segments rest for 1 to 4 hours before applying a mud board twice to absorb moisture and achieve a smooth and dense surface. The segment surface must be free of stone marks, honeycombs, or air holes. After absorbing moisture and plastering, immediately cover the segments with plastic film to prevent water loss and cracking.

[0044] After demoulding, remove the geotextile and use special tools to clean the surface of the mold cavity to keep the surface clean and free of dirt and rust. The surface damage and cleanliness of the geotextile determine whether it can be recycled. Generally, the geotextile needs to be replaced after 3 pourings.

[0045] Example 2

[0046] As another specific implementation example of the present invention, Figure 3 As shown, this embodiment also provides an example of a combined formwork for concrete pouring using a vertical tube sheet formwork.

[0047] Arrange the steel cage and embedded parts, and splice the vertical cylinder template. Arrange the geotextile 2 on the vertical surfaces on both sides of the mold cavity, and apply release agent on the contact surface with concrete.

[0048] After pouring, scrape off excess concrete with a scraper and smooth the surface along the steel formwork to achieve a smooth and dense finish. Depending on the season, allow the concrete segments to rest for 1 to 4 hours before applying a water-absorbing plaster twice to achieve a smooth and dense surface. When vibrating the concrete through the geotextile, air bubbles are channeled out through the warp and weft lines to avoid stone marks, honeycombing, and pores on the segment surface. After the water-absorbing plastering is complete, immediately cover the segment with plastic film to prevent water loss and cracking on the concrete segment surface.

[0049] After demoulding, remove the geotextile 2 and use special tools to clean the surface of the mold cavity to keep the surface clean and free of dirt and rust. The damage and cleanliness of the geotextile surface determine whether it can be recycled. Generally, the geotextile 2 needs to be replaced after 3 pourings.

[0050] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A precast concrete casting composite formwork, characterized in that: The combined template includes: A concrete pouring template (1) has an inner cavity that matches the size and shape of the concrete component to be poured, and a steel cage and embedded parts are arranged in the inner cavity to constrain the concrete; The geotextile (2) is arranged on the inner wall surface of the concrete casting template (1) and has longitude and latitude lines for guiding gas discharge.

2. A precast concrete casting composite formwork according to claim 1, characterized in that: The side of the geotextile (2) in contact with the concrete is evenly coated with a release agent for facilitating the demoulding of the concrete.

3. The precast concrete casting composite formwork according to claim 1, characterized in that: The geotextile (2) is arranged on the wall surface on one side of the inner cavity of the concrete pouring template (1).

4. The precast concrete casting composite formwork according to claim 1, characterized in that: The geotextile (2) is arranged on multiple wall surfaces of the inner cavity of the concrete casting template (1).

5. The precast concrete casting composite formwork according to claim 1, characterized in that: The geotextile (2) is a geotextile made of synthetic fiber material.

6. The precast concrete casting composite formwork according to claim 1, characterized in that: The casting template (1) is a spliced ​​horizontal tube template.

7. The precast concrete casting composite formwork according to claim 1, characterized in that: The concrete pouring formwork (1) is a spliced ​​vertical tube sheet formwork.

8. A precast concrete casting composite formwork according to claim 6 or 7, characterized in that: The concrete pouring template (1) is a metal plate.

9. The precast concrete casting composite formwork according to claim 8, characterized in that: The concrete pouring template (1) is made of steel plate or aluminum plate.

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