Self-sealing template of UHPC (Ultra High Performance Concrete) component

Abstract

The utility model discloses a self-sealing formwork of UHPC components and a construction method. The self-sealing formwork of the UHPC components comprises the two prefabricated UHPC components, and the two UHPC components are connected end to end to form a cylindrical UHPC shell. The UHPC component comprises an arc-shaped main body and a plurality of high-strength steel bars, the high-strength steel bars are evenly distributed in the axis direction of the main body, the two ends of each high-strength steel bar extend out of the two ends of the main body, an arc-shaped extension plate is arranged at one end of the main body, and the thickness of the arc-shaped extension plate is smaller than that of the main body. Wherein the main body of one UHPC component is connected with the arc-shaped extension plate of the other UHPC component, a protection plate is arranged at the joint of the main body and the arc-shaped extension plate, and meanwhile, the two high-strength steel bars, located on the same plane, of the two UHPC components are connected end to end to form a high-strength steel bar ring. According to the utility model, the UHPC components can be quickly connected, so that the problems in the prior art are solved, the construction efficiency and durability of the whole structure are improved, and technical support is provided for the application of UHPC in more fields.

Description

TECHNICAL FIELD

[0001] The utility model relates to building structure reinforcing technology, concretely relates to a kind of self-closing formwork of UHPC component. BACKGROUND

[0002] Ultra-high performance concrete (UHPC) is a new type of building material with excellent mechanical properties and durability. In recent years, UHPC has been widely studied and applied in bridge engineering, building structure, and protective engineering. With the continuous development of UHPC materials, how to effectively apply them to structures and achieve fast and reliable connections has become the focus of the engineering community.

[0003] In terms of connection technology, existing patents have proposed various fast connection devices, such as a quick plug-in connection device that achieves fast connection and separation through the relative movement of two connecting pieces, making it easy to operate. Another patent proposes a UHPC material for rapid connection structure of widened bridge deck system, which reserves transverse steel bars in the bridge deck panel at the splicing position of the new and old bridge superstructure, welds the connecting steel bars in the wet joint on site, and pours UHPC concrete in the wet joint to complete the connection.

[0004] However, the existing connection methods still have some shortcomings, such as complex construction, insufficient durability, and long time. INVENTION CONTENTS

[0005] The first purpose of the utility model is to overcome the shortcomings of the existing technology and provide a self-closing formwork for UHPC components. This self-closing formwork for UHPC components has better connection effect and construction speed, allowing it to be used in more extensive application scenarios.

[0006] The second purpose of the utility model is to provide a construction method based on the self-closing formwork for UHPC components.

[0007] The purpose of the utility model is achieved through the following technical solutions: the self-closing formwork for UHPC components includes two prefabricated UHPC components, and the two UHPC components are connected end-to-end to form a cylindrical UHPC shell. The UHPC component includes a circular arc-shaped main body and multiple high-strength steel bars, which are evenly distributed along the axis direction of the main body, and the two ends of all high-strength steel bars extend out of the two ends of the main body. One end of the main body is provided with an arc-shaped extension plate, and the thickness of the arc-shaped extension plate is less than the thickness of the main body. The main body in one UHPC component is connected with the arc-shaped extension plate in the other UHPC component, and a protective plate is arranged at the connection between the main body and the arc-shaped extension plate. Two high-strength steel bars in the same plane of the two UHPC components are connected end-to-end to form a high-strength steel bar ring.

[0008] Preferably, the inner side of the main body and the arc-shaped extension plate is provided with a rough side formed by using a high-pressure water gun to chisel.

[0009] Preferably, the main body in one UHPC component is connected with the arc-shaped extension plate in another UHPC component by a modified acrylic adhesive.

[0010] Preferably, the plurality of high-strength steel bars are arranged in parallel.

[0011] Preferably, the length of the part of each high-strength steel bar extending out of the main body is greater than the arc length of the arc-shaped extension plate.

[0012] The construction method of the self-sealing formwork of the UHPC component based on the first purpose comprises the following steps:

[0013] S1, determining the size of a column to be reinforced;

[0014] S2, prefabricating the UHPC component in a factory based on the size of the column to be reinforced;

[0015] S3, splicing two UHPC components on the outer side of the column, and connecting two high-strength steel bars between the two UHPC components in the same plane;

[0016] S4, connecting the two spliced UHPC components by a modified acrylic adhesive, and fixing a wooden plate on the outer side, so that the two UHPC components and the wooden plate form a containing cavity, and the column is located in the containing cavity;

[0017] S5, injecting UHPC paste into the containing cavity, and reinforcing the column after the UHPC paste is solidified.

[0018] Preferably, in step S1, if the column to be reinforced is a square column, the square column is chamfered.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] The self-closing formwork of the UHPC component in the utility model is formed by two prefabricated UHPC components, wherein the UHPC component comprises a main body in arc shape and a plurality of high-strength steel bars, the UHPC components are connected by the main body and the arc-shaped extension plate, and the high-strength steel bars of the two can be quickly overlapped, so that the UHPC components can be quickly connected, the problem in the prior art is solved, the construction efficiency and durability of the overall structure are improved, and technical support is provided for the application of UHPC in more fields. The self-closing formwork of the UHPC component not only meets various functional requirements of building use, but also has the advantages of convenient design and construction, can implement the standardized operation mode of column reinforcement in various common situations, and is convenient, fast, simple and efficient. The construction method of the utility model is implemented based on the self-closing formwork of the UHPC component, which not only meets various functional requirements of building use, but also has the advantages of convenient design and construction, is the preferred form of temporary or emergency structure, and is an important link in the development of sustainable building structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the self-closing formwork of the UHPC component of the utility model.

[0022] Figure 2 It is a front view of the self-closing formwork of the UHPC component of the utility model.

[0023] Figure 3 It is a structural schematic view of the UHPC component of the utility model.

[0024] Figure 4 It is a construction flowchart of the utility model.

[0025] Among them, 1 is the UHPC component, 2 is the main body, 3 is the high-strength steel bar, 4 is the arc-shaped extension plate, 5 is the protective plate, 6 is the modified acrylic adhesive, 7 is the rough side, 8 is the UHPC slurry, and 9 is the column. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings and examples.

[0027] As Figures 1 to 3As shown, the self-sealing template of this UHPC component includes two prefabricated UHPC components, which are connected end-to-end to form a cylindrical UHPC shell. Each UHPC component includes an arc-shaped main body and multiple high-strength steel bars. The high-strength steel bars are evenly distributed along the axial direction of the main body and are arranged in parallel. Both ends of all the high-strength steel bars extend beyond both ends of the main body. One end of the main body is provided with an arc-shaped extension plate, the thickness of which is less than the thickness of the main body. The main body of one UHPC component is connected to the arc-shaped extension plate of the other UHPC component, and a protective plate is provided at the connection between the main body and the arc-shaped extension plate. Simultaneously, two high-strength steel bars in the two UHPC components located on the same plane are connected end-to-end to form a high-strength steel bar ring.

[0028] Specifically, the thickness of the main body is greater than that of the curved extension plate. Both the main body and the curved extension plate are made of UHPC (Ultra-High-Strength Polymer), and they are connected together to form a semi-ring shape. When the two UHPC components are connected end-to-end, they form a cylindrical UHPC shell, with a gap between the two main bodies. The ends of two high-strength steel bars on the same horizontal plane are overlapped for quick connection. The overlap between the two high-strength steel bars is located directly inside the curved extension plate, at the gap between the two main bodies, making the entire structure compact.

[0029] The inner sides of the main body and the arc-shaped extension plate are roughened using a high-pressure water gun. These roughened surfaces ensure strong adhesion to the subsequently injected UHPC grout, further improving the curing effect.

[0030] The main body of one UHPC component is connected to the curved extension plate of another UHPC component using a modified acrylic adhesive. This connection is stable and, in conjunction with the protective plate, prevents subsequent overflow of UHPC grout, ensuring effective implementation.

[0031] The length of each high-strength steel bar extending beyond the main body is greater than the arc length of the curved extension plate. In other words, the sum of the lengths of the two ends of each high-strength steel bar extending beyond the main body is greater than the length of the curved extension plate. This design ensures that two high-strength steel bars on the same horizontal plane have sufficient lap length to protect the stability of the connection.

[0032] like Figure 4 As shown, the construction method for the self-sealing formwork of the UHPC component based on the first objective includes the following steps:

[0033] S1. Determine the dimensions of the column to be reinforced; if the column to be reinforced is a square column, chamfer the square column, that is, determine the parameters of the prefabricated UHPC component based on the dimensions of the column to be reinforced.

[0034] S2. Prefabricate UHPC components in the factory based on the dimensions of the column to be reinforced;

[0035] S3, two UHPC components are spliced on the outer side of the column, and two high-strength steel bars between the two UHPC components are connected end to end in the same plane;

[0036] S4, the two spliced UHPC components are connected by modified acrylic adhesive, and a wood board is fixed on the outer side, so that the two UHPC components and the wood board form a containing cavity, and the column is located in the containing cavity;

[0037] S5, UHPC paste is injected into the containing cavity, and the column is reinforced after the UHPC paste is solidified.

[0038] The self-sealing formwork of the UHPC component and the construction method can not only meet various functional requirements of building use, but also have the advantages of convenient design and construction, and can implement a standardized operation mode for column reinforcement in various common situations, and the self-formwork system is convenient, fast, simple and efficient.

[0039] The specific embodiments described above are preferred embodiments of the utility model, and cannot limit the utility model, and any changes or other equivalent replacement modes without departing from the technical solutions of the utility model are included in the protection scope of the utility model.

Claims

1. Self-closing formwork for UHPC elements, characterized in that, The application relates to a UHPC (Ultra High Performance Concrete) outer shell, which comprises two prefabricated UHPC components, and the two UHPC components are connected at the head and tail to form a cylindrical UHPC outer shell; the UHPC component comprises a circular arc-shaped main body and a plurality of high-strength steel bars, the plurality of high-strength steel bars are uniformly distributed along the axial direction of the main body, and the two ends of all the high-strength steel bars extend out of the two ends of the main body; one end of the main body is provided with an arc-shaped extension plate, and the thickness of the arc-shaped extension plate is smaller than the thickness of the main body; the main body in one UHPC component is connected with the arc-shaped extension plate in the other UHPC component, and a guard plate is arranged at the connecting position between the main body and the arc-shaped extension plate; meanwhile, two high-strength steel bars in the same plane of the two UHPC components are connected at the head and tail to form a high-strength steel bar ring.

2. Self-sealing formwork for UHPC elements according to claim 1, characterized in that, The inner side of the main body and the arc-shaped extension plate is provided with a rough side surface formed by a high-pressure water gun.

3. Self-closing formwork for UHPC elements according to claim 1, characterized in that, The main body in one UHPC component is connected with the arc-shaped extension plate in the other UHPC component through a modified acrylate adhesive.

4. Self-sealing formwork for UHPC elements according to claim 3, characterized in that, The plurality of high-strength steel bars are arranged in parallel.

5. Self-sealing formwork for UHPC elements according to claim 1, characterized in that, The length of the part of each high-strength steel bar extending out of the main body is greater than the arc length of the arc-shaped extension plate. The application further relates to a UHPC outer shell, which comprises two prefabricated UHPC components, and the two UHPC components are connected at the head and tail to form a cylindrical UHPC outer shell; the UHPC component comprises a circular arc-shaped main body and a plurality of high-strength steel bars, the plurality of high-strength steel bars are uniformly distributed along the axial direction of the main body, and the two ends of all the high-strength steel bars extend out of the two ends of the main body; one end of the main body is provided with an arc-shaped extension plate, and the thickness of the arc-shaped extension plate is smaller than the thickness of the main body; the main body in one UHPC component is connected with the arc-shaped extension plate in the other UHPC component, and a guard plate is arranged at the connecting position between the main body and the arc-shaped extension plate; meanwhile, two high-strength steel bars in the same plane of the two UHPC components are connected at the head and tail to form a high-strength steel bar ring. The inner side of the main body and the arc-shaped extension plate is provided with a rough side surface formed by a high-pressure water gun. The main body in one UHPC component is connected with the arc-shaped extension plate in the other UHPC component through a modified acrylate adhesive. The plurality of high-st

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