A template-free prefabricated diaphragm structure

Abstract

The present application relates to a kind of free template assembly type diaphragm structures, including the UHPC diaphragm of being arranged in the inside of main beam;Two ends of UHPC diaphragm are equipped with embedded T-shaped plate, and the outer surface of T-shaped plate is left with several PBL connecting reserved holes, for the convenience of later pouring, rubber plate is set on UHPC diaphragm, and the part of main beam where diaphragm is arranged is prefabricated with notch, to facilitate erecting UHPC diaphragm, diaphragm structure is hoisted on main beam, high-strength adhesive colloid is used to paste rubber plate on main beam, and UHPC material is used to pour notch, the present application is designed simple and ingenious structure, UHPC material is used in diaphragm structure, can give full play to the good mechanical properties and durability of UHPC material, using assembly type structure can effectively avoid on-site construction to bind a large number of steel bars and erect formwork, effectively reduce construction difficulty;In addition, by rough processing to reserved slot hole, the transverse connection between each piece of main beam can be effectively strengthened.

Description

Technical Field

[0001] This invention patent relates to the field of prefabricated bridge construction technology, specifically to a template-free prefabricated diaphragm structure. Background Technology

[0002] Benefiting from the advantages of ultra-high performance concrete (UHVPC) main beams, such as small cross-section, high degree of assembly, lightweight, durability, and excellent load-bearing capacity, UHVPC main beam bridges are widely used in small and medium-span bridges. However, factors such as vehicle overloading, numerous crossbeam installation procedures, low degree of assembly, and poor material durability lead to insufficient lateral stiffness between beam structures, resulting in poor overall bridge load-bearing performance and affecting the safety of the bridge structure during operation. Common prefabricated diaphragm systems often have numerous pre-reinforced steel bars, requiring extensive welding work on-site, increasing construction steps. Furthermore, misalignment and other defects caused by non-coplanar diaphragms can hinder their effective lateral connection. Therefore, it is necessary to improve existing diaphragm construction techniques, not only to increase construction efficiency but also to ensure the quality of diaphragm construction.

[0003] In recent years, due to the excellent mechanical and durability properties of ultra-high performance concrete (UHPC), it has been continuously promoted and applied in practical engineering. Since the construction of UHPC materials requires high curing conditions, the difficulties in the construction process can be avoided by using prefabricated UHPC diaphragms in the factory.

[0004] Improvements are needed to address the aforementioned technical issues. Summary of the Invention

[0005] The purpose of this invention is to provide a template-free prefabricated diaphragm structure. In order to overcome the defects of the prior art, this invention provides a prefabricated UHPC diaphragm structure with a main beam that is simple in structure, ingenious in design, and ensures excellent structural performance.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A template-free prefabricated diaphragm structure includes main beams and UHPC diaphragms assembled between two main beams.

[0008] The UHPC diaphragm includes a crossbeam, with T-shaped plates at both ends. The main beam has pre-fabricated slots at the locations where the UHPC diaphragm is installed, and two rubber plates are movably connected to the outer surface of the crossbeam.

[0009] Furthermore, the rubber sheet is connected to the side of the groove by adhesive bonding, so that the groove forms a sealed chamber with an open top, which facilitates the pouring of UHPC concrete.

[0010] Furthermore, the groove surface where the T-shaped plate contacts the main beam is roughened by any one of the following processes: prefabrication, grooving, and roughening.

[0011] Furthermore, the bottom of the slot is on the same horizontal plane as the bottom of the T-shaped plate and the crossbeam, and the main beam is connected to the UHPC diaphragm structure by pouring UHPC concrete into a T-shaped plate.

[0012] Furthermore, the beam has several rows of longitudinal bars perpendicular to the beam, and the beam also has several rows of transverse bars perpendicular to the longitudinal bars. The transverse and longitudinal bars form a steel mesh, and the T-shaped plate is connected to the steel mesh by welding.

[0013] Furthermore, the T-shaped plate is made of steel plate, and symmetrically arranged PBL connection reserved holes are provided on the T-shaped plate.

[0014] A template-free prefabricated diaphragm structure includes the following steps:

[0015] 1) Based on the transverse spacing of the main beams, beam height and web height, UHPC diaphragms are prefabricated in the factory; during prefabrication, T-shaped plates are arranged at both ends of the UHPC diaphragms. After the UHPC diaphragm structure meets the design requirements, rubber plates are installed in the middle of the UHPC diaphragm structure.

[0016] 2) When the main beam is prefabricated, slots will be reserved in the parts with UHPC diaphragm structures. After the main beam is prefabricated, the surface of the reserved slots of UHPC diaphragms on the main beam will be roughened to enhance the bonding between the old and new concrete.

[0017] 3) Install the UHPC diaphragm precisely on site, placing the two ends of the UHPC diaphragm with T-shaped plates on the slots of the main beam.

[0018] 4) Before pouring concrete into the reserved slots of the UHPC diaphragm and main beam, the inside of the slot should be cleaned to remove oil and debris. Ensure that the bonding surface is fully moistened during pouring. Pull the rubber plate attached to the UHPC diaphragm to the corresponding part of the slot of the main beam and use high-strength adhesive to stick the rubber plate to the outside of the slot of the main beam, so that the slot forms a closed cavity with an opening at the top.

[0019] 5) Pour UHPC material into the main beam slots in sequence. Before pouring UHPC concrete, be sure to check and ensure that the rubber sheet is in close contact with the main beam. If necessary, reinforce the material to avoid leakage during the pouring process.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] In this invention, the steel plate is embedded in the transverse diaphragm as a permanent template and welded to the steel mesh on the transverse diaphragm to form a whole. The design of this invention is simple and ingenious. The use of UHPC material in the transverse diaphragm structure can give full play to the good mechanical properties and durability of UHPC material. The use of prefabricated structure can effectively avoid the need to tie a large number of steel bars and erect formwork on site, which can effectively reduce the construction difficulty. In addition, by roughening the reserved slots, the lateral connection between the main beams can be effectively strengthened. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 The diagram shown is a schematic diagram of the device structure in this application;

[0024] Figure 2 The diagram shown is a structural schematic of the diaphragm in this application;

[0025] Figure 3 The diagram shown is a structural schematic of the main beam in this application.

[0026] In the diagram: 1-Main beam, 12-Slot, 2-UHPC diaphragm, 21-T-shaped plate, 22-Rubber plate, 23-Crossbeam. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be fully described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0028] like Figures 1-3 As shown, this embodiment provides a template-free prefabricated diaphragm structure, including a main beam 1 and a UHPC diaphragm 2 assembled between two main beams 1; by adding the UHPC diaphragm 2 between the main beams 1, the lateral integrity of the main beam 1 structure can be effectively improved.

[0029] In this embodiment, the UHPC diaphragm 2 is prefabricated in a factory and steam-cured at high temperature. In order to increase the bonding effect between the UHPC diaphragm 2 and the main beam 1, the UHPC diaphragm 2 includes a beam 23. T-shaped plates 21 are provided at both ends of the beam 23. The surface of the groove 12 where the T-shaped plate 21 contacts the main beam 1 is roughened. The roughening treatment is performed by any one of the following processes: prefabrication, grooving, and chiseling. The determination of the above prefabrication, grooving, and chiseling treatment methods is based on the stress conditions of the main beam and the T-shaped plate.

[0030] The main beam 1 has a prefabricated slot 12 at the location where the UHPC diaphragm 2 is installed. Two rubber plates 22 are movably connected to the outer surface of the crossbeam 23. The rubber plates 22 are connected to the side of the slot 12 by adhesive. The adhesive should be Class A adhesive that meets the specifications and design requirements. It is used to seal the side of the slot 12 so that the slot 12 forms a sealed chamber with an upper opening, which facilitates the pouring of UHPC concrete.

[0031] The present invention provides a template-free prefabricated UHPC diaphragm structure, which aims to fully utilize the advantages of UHPC materials and rapid prefabricated construction while enhancing the lateral connection of the main beams.

[0032] In this embodiment, preferably, the bottom of the slot 12 is on the same horizontal plane as the bottom of the T-shaped plate 21 and the crossbeam 23, and the main beam 1 and the UHPC diaphragm 2 structure are connected by casting UHPC material to the T-shaped plate 21.

[0033] In this embodiment, preferably, the beam 23 has several rows of longitudinal bars perpendicular to the beam 23 inside, and the beam 23 has several rows of transverse bars perpendicular to the longitudinal bars inside, the transverse bars and longitudinal bars forming a steel mesh, and the T-shaped plate 21 is connected to the steel mesh by welding.

[0034] In this embodiment, preferably, in order to ensure the strength of the T-shaped plate 21 after casting, the T-shaped plate 21 is made of steel plate, and the T-shaped plate 21 is provided with symmetrically arranged PBL connection reserved holes.

[0035] Meanwhile, the installation process of the aforementioned template-free prefabricated diaphragm structure includes the following steps:

[0036] (1) Based on the transverse spacing, beam height and web height of the main beam 1, the UHPC diaphragm 2 is prefabricated in the factory; during prefabrication, T-shaped plates 21 are arranged at both ends of the UHPC diaphragm 2. After the UHPC diaphragm 2 structure meets the design requirements, the rubber plate 23 is installed in the middle of the UHPC diaphragm 2 structure.

[0037] (2) When the main beam 1 is prefabricated, the slot 12 of the part with the UHPC diaphragm 2 structure is reserved. After the main beam 1 is prefabricated, the surface of the reserved slot 12 of the UHPC diaphragm 2 on the main beam 1 is roughened to enhance the bonding effect between the old and new concrete.

[0038] (3) Install the UHPC diaphragm 2 precisely on site, and place the two ends of the UHPC diaphragm 2 with the T-shaped plate 21 on the slot 12 of the main beam 1 respectively.

[0039] (4) Before pouring concrete into the reserved slots 12 of the UHPC diaphragm 2 and the main beam 1, the surface of the slot 12 should be cleaned to remove oil and debris. Ensure that the bonding surface is fully moistened during pouring. Pull the rubber plate 23 attached to the UHPC diaphragm 2 to the corresponding part of the slot 12 of the main beam 1. Use high-strength adhesive to stick the rubber plate 23 to the outside of the slot 12 of the main beam 1, so that the slot 12 forms a closed chamber with an upper opening.

[0040] (5) Pour UHPC material into the slot 12 of the main beam 1 in sequence. Before pouring UHPC concrete, be sure to check and ensure that the rubber plate 23 is in close contact with the main beam 1. If necessary, strengthen the treatment to avoid leakage of grout during the pouring process.

[0041] In this invention, the T-shaped plate 21 is embedded in the UHPC diaphragm 2 as a permanent template and welded to the steel mesh on the UHPC diaphragm 2 to form a whole. The invention has a simple and ingenious design. The use of UHPC material in the UHPC diaphragm 2 structure can give full play to the good mechanical properties and durability of UHPC material. The use of prefabricated structure can effectively avoid the need to tie a large number of steel bars and erect formwork on site, which can effectively reduce the construction difficulty. In addition, by roughening the groove 12 and pouring UHPC material, the lateral connection between each main beam can be effectively strengthened.

[0042] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A template-free prefabricated diaphragm structure, characterized in that: Includes a main beam (1), assembled between two main beams (1). UHPC diaphragm (2); The UHPC diaphragm (2) includes a crossbeam (23), and T-shaped plates (21) are provided at both ends of the crossbeam (23). The main beam (1) has a pre-made slot (12) at the part where the UHPC diaphragm (2) is provided. Two rubber plates (22) are movably connected to the outer surface of the crossbeam (23). The rubber plate (22) is connected to the side of the main beam groove (12) by adhesive bonding, so that the groove (12) forms a sealed chamber with an upper opening, which facilitates the pouring of UHPC concrete. The bottom of the slot (12) is on the same horizontal plane as the bottom of the T-shaped plate (21) and the crossbeam (23). The main beam (1) and the UHPC diaphragm (2) structure are connected by pouring UHPC concrete into the T-shaped plate (21). The beam (23) has several rows of longitudinal bars perpendicular to the beam (23) inside, and the beam (23) has several rows of transverse bars perpendicular to the longitudinal bars inside. The transverse bars and longitudinal bars form a steel mesh, and the T-shaped plate (21) is connected to the steel mesh by welding.

2. The template-free prefabricated diaphragm structure as described in claim 1, characterized in that: The surface of the groove (12) where the T-shaped plate (21) contacts the main beam (1) is roughened by any one of the following processes: prefabrication, grooving, and chiseling.

3. The template-free prefabricated diaphragm structure as described in claim 1, characterized in that: The T-shaped plate (21) is made of steel plate, and symmetrically arranged PBL connection reserved holes are provided on the T-shaped plate (21).

4. A template-free prefabricated diaphragm structure as described in any one of claims 1-3, characterized in that: Includes the following steps: 1) Based on the transverse spacing, beam height and web height of the main beam (1), the UHPC diaphragm (2) is prefabricated in the factory; during prefabrication, T-shaped plates (21) are arranged at both ends of the UHPC diaphragm (2). After the UHPC diaphragm (2) structure meets the design requirements, the rubber plate (23) is installed in the middle of the UHPC diaphragm (2) structure. 2) When the main beam (1) is prefabricated, the slot (12) of the part with the UHPC diaphragm (2) structure is reserved. After the main beam (1) is prefabricated, the surface of the reserved slot (12) of the UHPC diaphragm (2) on the main beam (1) is roughened to strengthen the bonding effect between the old and new concrete. 3) Install the UHPC diaphragm (2) precisely on site, and place the two ends of the UHPC diaphragm (2) with T-shaped plates (21) on the slots (12) of the main beam (1); 4) Before pouring concrete into the reserved slots (12) of the UHPC diaphragm (2) and the main beam (1), the surface of the slot (12) should be cleaned to remove oil and debris. Ensure that the bonding surface is fully moistened during pouring. Pull the rubber plate (23) attached to the UHPC diaphragm (2) to the corresponding part of the slot (12) of the main beam (1). Use high-strength adhesive to stick the rubber plate (23) to the outside of the slot (12) of the main beam (1) so that the slot (12) forms a closed chamber with an upper opening. 5) Pour UHPC material into the groove (12) of the main beam (1) in sequence. Before pouring UHPC concrete, be sure to check and ensure that the rubber plate (23) is in close contact with the main beam (1) to avoid leakage of grout during the pouring process.

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