UHPC bridge support shell membrane structure

Abstract

The utility model relates to the technical field of bridge support shell membranes, in particular to a UHPC (Ultra High Performance Concrete) bridge support shell membrane structure which comprises embedded steel bars arranged on a bridge support padstone, the embedded steel bars of the support are divided into two kinds of steel bars which are arranged in a longitudinal and transverse staggered manner, and the structure further comprises an R-shaped shell membrane, and the inner wall of the R-shaped shell membrane is an inner cambered surface which is sequentially inclined inwards from top to bottom. According to the utility model, the R-shaped shell membrane is used for replacing a conventional support template to pour the support padstone, the template does not need to be removed after the support concrete padstone is poured, and only the prefabrication of the R-shaped shell membrane needs to be completed in advance in a factory, so that the installation is convenient, the high-altitude operation time is greatly reduced, and the construction safety coefficient and the construction quality are improved; meanwhile, the structure gives full play to the characteristics of high durability, high toughness and high strength of the UHPC, improves the compression bearing capacity hooping effect of the support padstone concrete, and solves the problems that the traditional common concrete support padstone is easy to crack and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge bearing shell membranes, in particular to a UHPC bridge bearing shell membrane structure. Background Art

[0002] The bearing pad stone is one of the important components of the lower pier of the bridge. It is an important carrier connecting the lower pier and the upper bearing. It not only adjusts the elevation error or deviation leveling caused by the construction of the lower structure, but also creates construction space for the bridge due to bearing replacement (the jack is placed on the top of the cap beam, and the upper structure is supported by the jack). It has the characteristics of thin thickness, small size, dense steel bars and stress concentration, which puts forward stringent requirements on the construction quality.

[0003] The existing bridge bearing pad stone construction process is as follows: 1. Bend and tie the pre-buried bearing steel bars on the top of the pier to form a preliminary shape; 2. Roughen the concrete corresponding to the pad stone area and clean the steel bars; 3. Splice the bearing pad stone template; 4. Pour the pad stone concrete; 5. Remove the template. This method requires multiple people to splice the template, the high-altitude operation time is long, and the consumables are serious (the mold is amortized once), and the construction quality such as flatness is uneven; at the same time, it is necessary to arrange a special person to "climb" to the top of the pier to remove the template. Removing the template too early or too late will affect the apparent quality. Therefore, a UHPC bridge bearing shell membrane structure is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a UHPC bridge bearing shell membrane structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A UHPC bridge bearing shell membrane structure includes embedded steel bars arranged on a bridge bearing pad stone, wherein the embedded steel bars include longitudinal steel bars and transverse steel bars, and the longitudinal steel bars and the transverse steel bars are arranged in an interlaced manner, and further includes:

[0007] R-type shell membrane, the inner wall of the R-type shell membrane is an inner arc surface that is inclined inward from top to bottom, and the surface of the inner arc surface is a rough surface;

[0008] A shell membrane steel mesh is arranged inside the R-type shell membrane.

[0009] As a preferred solution, reinforcing bars are laid at intervals on the shell membrane steel mesh.

[0010] As a preferred solution, the reinforcing ribs are annular stirrups, the reinforcing ribs are laid in the lower half of the R-shaped shell membrane, and the reinforcing ribs are welded to the shell membrane steel mesh.

[0011] As a preferred solution, it also includes a connecting steel belt, which is arranged in the central area of ​​the four sides of the R-shaped shell membrane, and the connecting steel belt is tied or welded to the longitudinal steel bars or transverse steel bars.

[0012] As a preferred solution, one end of the connecting steel belt is inserted into the R-shaped shell membrane, and the connecting steel belt is welded to the shell membrane steel mesh through a triangular support.

[0013] As a preferred solution, the triangular support is a T-shaped structure formed by vertically welding two steel bars, and the connecting steel strips are welded on the welding points of the T-shaped structure.

[0014] As a preferred solution, the connecting steel belt is located in the upper half of the shell membrane steel mesh.

[0015] It can be seen from the technical solution provided by the utility model that the UHPC bridge bearing shell membrane structure provided by the utility model has the following beneficial effects:

[0016] 1. By using R-type shell membrane to replace conventional formwork for pouring bridge bearings, there is no need to remove the formwork after pouring the bearing concrete pad stone. It only needs to prefabricate the R-type shell membrane in the factory in advance, which is convenient for installation, greatly reduces the time of high-altitude operations, and improves the construction safety factor and construction quality. At the same time, the structure gives full play to the high durability, high toughness and high strength characteristics of UHPC ultra-high performance concrete, improves the hoop effect of the compressive bearing capacity of the bearing pad stone concrete, solves the problems of easy cracking of the traditional ordinary concrete bearing pad stone, and effectively improves the service life of the structure.

[0017] 2. The R-type shell membrane is cast by UHPC and serves as a template for pouring the inner core concrete of the support pad stone, while also bearing the vertical bearing capacity transmitted by the upper support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a UHPC bridge support shell membrane structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the R-type shell membrane in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the steel structure on the bridge support base in the utility model.

[0021] In the figure: 1. R-type shell membrane; 11. inner arc surface; 2. connecting steel belt; 21. triangular support; 3. longitudinal steel bar; 31. transverse steel bar; 4. shell membrane steel mesh; 41. reinforcing ribs. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example 1

[0027] like Figure 1-3 As shown, the embodiment of the utility model provides a UHPC bridge bearing shell membrane structure, including embedded steel bars arranged on the bridge bearing pad stone, the embedded steel bars include longitudinal steel bars 3 and transverse steel bars 31, and the longitudinal steel bars 3 and the transverse steel bars 31 are arranged alternately, and also include an R-type shell membrane 1, the R-type shell membrane 1 is integrally cast and formed by UHPC ultra-high performance concrete, and there is no need to remove the mold after the bearing concrete pad stone is cast, and it is only necessary to prefabricate the R-type shell membrane in the factory in advance, which is convenient to install, greatly reduces the high-altitude operation time, and improves the construction safety factor and construction quality; at the same time, the structure gives full play to the high durability, high toughness and high strength characteristics of UHPC ultra-high performance concrete, improves the hoop effect of the compressive bearing capacity of the bearing pad stone concrete, solves the problems of easy cracking of the traditional ordinary concrete bearing pad stone, and effectively improves the service life of the structure;

[0028] Furthermore, the inner wall of the R-shaped shell membrane 1 is an inner arc surface 11 which is inclined inward from top to bottom, and the surface of the inner arc surface 11 is a rough surface, which can increase the overall coordinated force between the shell membrane and the support pad stone concrete;

[0029] Specifically, during construction, the concrete surface of the pier top support pad area is roughened and cleaned, and then a layer of epoxy mortar is applied, and the R-type shell membrane 1 is placed in the corresponding position to ensure that the R-type shell membrane 1 is seamlessly connected with the pier and there is no leakage when pouring concrete.

[0030] In one embodiment, a shell membrane steel mesh 4 is arranged inside the R-type shell membrane 1, and reinforcing ribs 41 are laid at intervals on the shell membrane steel mesh 4. The reinforcing ribs 41 are annular hoop bars. The reinforcing ribs 41 are laid in the lower half of the R-type shell membrane 1, and the reinforcing ribs 41 are welded to the shell membrane steel mesh 4. The arrangement of the shell membrane steel mesh 4 and the reinforcing ribs 41 further improves the structural strength of the R-type shell membrane 1 and enhances its anti-deformation ability.

[0031] In one embodiment, it also includes a connecting steel belt 2, which is arranged in the central area of ​​the four sides of the R-shaped shell membrane 1, and the connecting steel belt 2 is plated or welded with the longitudinal steel bars 3 or the transverse steel bars 31, and one end of the connecting steel belt 2 is inserted into the R-shaped shell membrane 1, and the connecting steel belt 2 is welded to the shell membrane steel mesh 4 through a triangular support 21, and the triangular support 21 is a T-shaped structure formed by vertically welding two steel bars, and the connecting steel belt 2 is welded at the welding point of the T-shaped structure, and the connecting steel belt 2 is located in the upper half of the shell membrane steel mesh 4;

[0032] The provision of the connecting steel belt 2 improves the structural strength of the connection between the R-type shell membrane 1 and the steel structure on the base, and avoids deformation of the shell wall of the R-type shell membrane 1 due to factors such as vibration of the vibrating equipment during the casting process. Example 2

[0033] The structure of this embodiment is similar to that of Embodiment 1, with the difference being that an annular stirrup is arranged inside the R-shaped shell membrane 1, and the annular shape is estimated to be formed by bending a plain round steel bar, and a number of steel bar keys perpendicular to the shell membrane are arranged at equal intervals around the inner side of the shell membrane, and the steel bar keys are connected to the stirrup by welding.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A UHPC bridge bearing shell membrane structure, comprising embedded steel bars arranged on a bridge bearing pad stone, wherein the embedded steel bars include longitudinal steel bars (3) and transverse steel bars (31), and the longitudinal steel bars (3) and the transverse steel bars (31) are arranged in an interlaced manner, characterized in that: Also includes: An R-shaped shell membrane (1), wherein the inner wall of the R-shaped shell membrane (1) is an inner arc surface (11) that is inclined inwards from top to bottom, and the surface of the inner arc surface (11) is a rough surface; A shell membrane steel mesh (4) is arranged inside the R-shaped shell membrane (1).

2. The UHPC bridge bearing shell membrane structure according to claim 1 is characterized in that: Reinforcing ribs (41) are laid at intervals on the shell membrane steel mesh (4).

3. The UHPC bridge bearing shell membrane structure according to claim 2 is characterized in that: The reinforcing ribs (41) are annular stirrups, the reinforcing ribs (41) are laid in the lower half of the R-shaped shell membrane (1), and the reinforcing ribs (41) are welded to the shell membrane steel mesh (4).

4. The UHPC bridge bearing shell membrane structure according to claim 1, characterized in that: It also includes a connecting steel belt (2), the connecting steel belt (2) being arranged at the central areas of the four sides of the R-shaped shell membrane (1), and the connecting steel belt (2) being plate-tied or welded to the longitudinal steel bars (3) or the transverse steel bars (31).

5. The UHPC bridge bearing shell membrane structure according to claim 4 is characterized in that: One end of the connecting steel belt (2) is inserted into the R-shaped shell membrane (1), and the connecting steel belt (2) is welded to the shell membrane steel mesh (4) via a triangular support (21).

6. The UHPC bridge bearing shell membrane structure according to claim 5, characterized in that: The triangular support (21) is a T-shaped structure formed by vertically welding two steel bars, and the connecting steel strip (2) is welded to the welding point of the T-shaped structure.

7. The UHPC bridge bearing shell membrane structure according to claim 6, characterized in that: The connecting steel belt (2) is located in the upper half of the shell membrane steel mesh (4).

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