Pier pre-reserved hole reinforcement structure

Abstract

This application provides a reinforcement structure for pre-reserved holes in a pier, comprising two sets of reinforcement components respectively disposed on both sides of the pre-reserved hole in the vertical direction. Each reinforcement component includes vertical reinforcing bars and transverse reinforcing bars. Multiple vertical reinforcing bars are arranged side-by-side along the transverse depth direction of the pre-reserved hole. The transverse reinforcing bars are perpendicularly connected to the vertical reinforcing bars, and multiple transverse reinforcing bars are arranged side-by-side along the length of the vertical reinforcing bars. By providing reinforcement components on both vertical sides of the pre-reserved hole, this application enables the reinforcement components to bear the bending moment load transmitted by the moving formwork and the shear force from the construction of the corbel shear block. This effectively prevents shear damage to the concrete wall of the pre-reserved hole and also diffuses concentrated stress to the pier body, ensuring the integrity of the pier structure and reducing damage to the pier body caused by excessive loads transmitted by the moving formwork.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a reinforcement structure for pre-reserved holes in piers. Background Technology

[0002] In current bridge construction, the downstream mobile formwork system is widely used due to its advantages such as not occupying space under the bridge and strong adaptability. Its core function is to bear the formwork load through pre-drilled holes in the pier body. Generally, pre-drilled holes are set in the pier body, and the shear blocks at the bottom of the corbel of the formwork's triangular support structure extend into these holes, transferring the overall load of the formwork and the construction load to the pier. Because the mobile formwork system itself has a large load and bearing capacity, stress concentration cracks easily occur in the concrete around the pre-drilled holes. The traditional reinforcement method is to thicken the pier wall as a whole. However, this traditional reinforcement method requires a large amount of concrete and affects the seismic performance of the pier. The corbel shear blocks of the mobile formwork system are filled with ordinary epoxy mortar between themselves and the pre-drilled holes, resulting in low load transfer efficiency. Furthermore, under cyclic loads, the reinforcing bars around the pre-drilled holes are prone to fatigue slippage, leading to deviations in the position of the embedded sleeves and increasing the installation time of the mobile formwork. Utility Model Content

[0003] The purpose of this application is to provide a pier pre-reserved hole reinforcement structure that can strengthen the structure around the pre-reserved hole and ensure the integrity of the pier structure.

[0004] To achieve the above objectives, this application provides the following technical solution: A reinforcement structure for a pre-reserved hole in a pier body includes two sets of reinforcement components respectively disposed on two sides of the pre-reserved hole in the vertical direction. The reinforcement components include vertical reinforcement main bars and horizontal reinforcement bars. Multiple vertical reinforcement main bars are arranged side by side along the horizontal hole depth direction of the pre-reserved hole. The horizontal reinforcement bars are perpendicularly connected to the vertical reinforcement main bars, and multiple horizontal reinforcement bars are arranged side by side along the length direction of the vertical reinforcement main bars.

[0005] Further configuration: the length of the vertical reinforcing bar is greater than the maximum vertical diameter of the reserved hole, and the horizontal reinforcing bar is greater than the horizontal depth of the reserved hole.

[0006] Further features include a first steel mesh, which is respectively set on two opposite vertical sides of the reserved hole and on the vertical bottom surface between the two vertical sides.

[0007] Further configuration: Multiple vertical reinforcing bars are also provided along the horizontal direction of the vertical bottom surface.

[0008] Further configuration: A second steel mesh is provided below the reserved hole. The second steel mesh is laid horizontally, and the vertical reinforcing main bar extends downward to the second steel mesh.

[0009] Further configuration: The second steel mesh is provided in multiple layers along the vertical direction of the pier body, and the multiple layers of the second steel mesh are arranged in parallel.

[0010] Further features include an upper sleeve and a lower sleeve, which are respectively connected to the ends of the pier column reinforcement cut off at the reserved holes, and the upper sleeve and the lower sleeve are detachably connected with connecting main reinforcement bars.

[0011] Further configuration: Both the upper sleeve and the lower sleeve are threadedly connected to the main connecting bar, and the threads of the upper sleeve and the lower sleeve are in opposite directions.

[0012] Further configuration: The upper connecting sleeve and the lower connecting sleeve are provided in multiple sets along the transverse diameter of the reserved hole, and the upper connecting sleeve and the lower connecting sleeve correspond one to one.

[0013] Further configuration: The vertical reinforcing bars are spaced 12.5cm apart, and the horizontal reinforcing bars are spaced 15cm apart.

[0014] Compared with existing technologies, the solution in this application has the following advantages: 1. In the pier pre-reserved hole reinforcement structure involved in this application, by setting reinforcement components on the two vertical sides of the pre-reserved hole, the reinforcement components can bear the bending moment load transmitted by the moving formwork and the shear force of the corbel shear block construction, which can effectively prevent the concrete wall of the pre-reserved hole from being sheared and can also diffuse the concentrated stress to the pier body, so as to ensure the integrity of the pier structure and reduce the damage to the pier caused by excessive load transmitted by the moving formwork.

[0015] 2. In the pier body reserved hole reinforcement structure involved in this application, the first steel mesh and the second steel mesh can form a spatial grid, which significantly reduces the risk of shrinkage cracks around the reserved hole. Furthermore, the first steel mesh covers the three vertical sidewalls of the reserved hole, which can effectively suppress cracks caused by temperature stress and shrinkage deformation, and improve the structural strength of the reserved hole wall.

[0016] 3. In the pier body reserved hole reinforcement structure involved in this application, the main reinforcement bars can be installed through the upper sleeve and lower sleeve connected to the cut-off outer pier column reinforcement bars, realizing the recoverable connection of the cut-off reinforcement bars, which can meet the needs of both temporary disconnection and permanent repair during construction, and realize the reliability of the pier body reserved hole area throughout the entire life cycle.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure for creating pre-drilled holes on the surface of the pier body in this application; Figure 2 A front view of one embodiment of the pier body pre-reserved hole reinforcement structure of this application; Figure 3 A side view of one embodiment of the pier body pre-reserved hole reinforcement structure of this application; Figure 4 A top view of one embodiment of the pier body pre-reserved hole reinforcement structure of this application; Figure 5 This is a schematic diagram illustrating the use of connecting main reinforcement bars to repair the reserved holes in the pier body reinforcement structure of this application.

[0019] In the diagram, 1. Vertical reinforcing main bar; 2. Horizontal reinforcing bar; 3. First reinforcing mesh; 4. Second reinforcing mesh; 51. Upper sleeve; 52. Lower sleeve; 53. Connecting main bar; 100. Reserved hole; Detailed Implementation The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0023] To address the stability issues of the pre-reserved hole structure in the pier body, this application proposes a reinforcement structure for the pre-reserved hole in the pier body. Please refer to [link / reference needed]. Figures 1 to 5This allows the reinforced concrete around the reserved hole 100 in the pier to transfer the load of the moving formwork and the construction load of the box girder to the entire pier, reducing stress concentration on the wall of the reserved hole 100, ensuring the integrity of the pier structure, and reducing the impact of excessive load on the quality of the pier.

[0024] It should be noted that in this embodiment, the reserved hole 100 is set on the surface of the pier body, and the vertical cross-section of the reserved hole 100 is a right trapezoid. Its top surface is inclined, and its bottom surface extends horizontally, and its bottom surface is perpendicular to the vertical sides on both sides of the hole. The original design of the main reinforcement of the pier body is a double layer of pier body reinforcement arranged along the circumference of the pier body. The outer layer of pier body reinforcement located at the reserved hole 100 is cut off from the top and bottom surfaces of the reserved hole 100, and the inner layer of pier body reinforcement extends along the inner wall of the reserved hole 100. It can be pre-bent in the steel bar processing plant.

[0025] Specifically, the pier body reserved hole reinforcement structure includes two sets of reinforcement components respectively provided on two opposite sides of the reserved hole 100 in the vertical direction. The reinforcement components include vertical reinforcement main bars 1 and horizontal reinforcement bars 2. Multiple vertical reinforcement main bars 1 are arranged side by side along the horizontal hole depth direction of the reserved hole 100. The horizontal reinforcement bars 2 are perpendicularly connected to the vertical reinforcement main bars 1. Multiple horizontal reinforcement bars 2 are arranged side by side along the length direction of the vertical reinforcement main bars 1. The two sets of reinforcing components set on both sides of the reserved hole 100 can form a two-way force system. The vertical reinforcing main bar 1 is used to bear the bending moment load, and the horizontal reinforcing bar 2 is used to bear the shear force and suppress concrete cracks. The moving module is installed into the reserved hole 100 through its corbel shear block. Then, the load of the moving module is transferred to the hole wall concrete of the reserved hole 100 through its corbel shear block. The horizontal reinforcing bar 2 bears the shear force, and the vertical reinforcing main bar 1 is used to resist the bending moment load and further transfer the load of the moving module to the pier body. This can effectively optimize the stress of the concrete around the reserved hole 100.

[0026] Preferably, in this embodiment, the vertical reinforcing main bar 1 is made of φ32mm steel bar and is set at intervals of 12.5cm, and the horizontal reinforcing main bar 2 is made of φ20mm steel bar and is set at intervals of 15cm.

[0027] Furthermore, the length of the vertical reinforcing main bar 1 is greater than the maximum vertical diameter of the reserved hole 100, and the length of the horizontal reinforcing bar 2 is greater than the horizontal depth of the reserved hole 100, so that the reinforcing components completely cover the side of the reserved hole 100, ensuring the reinforcing effect of the reserved hole 100.

[0028] Furthermore, this application provides a first steel mesh 3 on each of the three vertical sides of the reserved hole 100. The three vertical sides are two opposite vertical sides of the reserved hole 100 and the vertical bottom surface located between the two vertical sides. The three first steel meshes 3 can form an integral skeleton in the circumference of the reserved hole 100, effectively constraining the concrete's cherry blossom shrinkage, reducing the peak stress around the hole, effectively suppressing shrinkage cracks, blocking the crack propagation path along the hole wall, and the first steel mesh 3 can increase the interlocking strength between the vertical reinforcing main bar 1, the horizontal reinforcing bar 2 and the concrete, further improving the reinforcement effect on the reserved hole 100.

[0029] Multiple vertical reinforcing bars 1 are also provided on the vertical bottom surface. These multiple vertical reinforcing bars 1 are arranged in the horizontal direction along the vertical bottom surface so that the load transmitted to the inner side of the reserved hole 100 can be transmitted to the pier body through the vertical reinforcing bars 1.

[0030] In this embodiment, the first steel mesh 3 uses φ16@8cm steel mesh to achieve good resistance through ultra-high density reinforcement, effectively improving shear resistance and local stiffness.

[0031] A second steel mesh 4 is provided below the reserved hole 100. The second steel mesh 4 is set horizontally, and the vertical reinforcing main bar 1 extends downward to the second steel mesh 4. The second steel mesh 4 can improve the bearing capacity of the concrete at the bottom of the reserved hole 100. As a horizontal support structure, it can also receive the load pressure transmitted by the vertical reinforcing main bar 1 and disperse the concentrated stress to a larger area of ​​the concrete base, reduce the stress concentration of the concrete at the bottom of the reserved hole 100, and suppress the risk of cracking.

[0032] Furthermore, the second reinforcing mesh 4 is provided in multiple layers along the vertical direction of the pier body. These multiple layers of second reinforcing mesh 4 are arranged in parallel. The shear force borne by each layer of second reinforcing mesh 4 can be transferred and dispersed through adjacent layers, further reducing local stress peaks and inhibiting the propagation of vertical cracks. In this embodiment, the layer spacing of the second reinforcing mesh 4 is 10cm, and the second reinforcing mesh 4 also uses φ16@8cm reinforcing mesh. The second reinforcing mesh 4 of this application can cooperate with the first reinforcing mesh 3 around the reserved hole 100 to form a spatial grid skeleton, which can significantly improve the integrity of the pier body concrete and enhance the durability of the area around the reserved hole 100.

[0033] The reinforcement structure for the pre-reserved hole in the pier body of this application also includes an upper sleeve 51 and a lower sleeve 52 connected to the main reinforcement of the pier column. The upper sleeve 51 and the lower sleeve 52 are connected to the main reinforcement of the pier column cut off from the pre-reserved hole 100 by a threaded connection. A connecting main reinforcement 53 is detachably connected between the upper sleeve 51 and the lower sleeve 52. The connecting main reinforcement 53 can be used to repair the pre-reserved hole 100 after the construction of the movable formwork is completed, so as to connect the outer layer of pier body reinforcement cut off from the pre-reserved hole 100. When installing the movable formwork, the connection opening of the upper sleeve 51 and the lower sleeve 52 must be tightly wrapped with sealing materials such as tape to prevent concrete liquid from entering the sleeve and affecting the subsequent installation of the connecting main reinforcement 53.

[0034] Both the upper sleeve 51 and the lower sleeve 52 are connected to the connecting main rib 53 by threaded connection. The upper sleeve 51 and the lower sleeve 52 are set with reverse threads. In this embodiment, multiple sets of upper sleeve 51 and lower sleeve 52 are set along the transverse diameter of the reserved hole 100, and each set of upper sleeve 51 and lower sleeve 52 corresponds one to one, so as to realize a multi-path load transfer network, making the stress distribution around the reserved hole 100 more uniform. Each set of sleeves adopts a standardized thread structure, which has independent replaceability, taking into account both construction convenience and structural reliability.

[0035] After the main reinforcing bars 53 are installed, the connection of the outer pier reinforcement is restored. Then, the formwork can be erected and concrete of the same grade as the pier body can be poured to complete the repair of the reserved hole 100. While pouring the concrete, attention should be paid to ensuring the thickness of the concrete cover and the compaction of the concrete.

[0036] In summary, the pier pre-reserved hole reinforcement structure of this application provides reinforcement components on the two vertical sides of the pre-reserved hole 100. These reinforcement components can bear the bending moment load transmitted by the moving formwork and the shear force of the corbel shear block construction. This can effectively prevent the concrete wall of the pre-reserved hole 100 from being sheared and can also diffuse the concentrated stress to the pier body, thereby ensuring the integrity of the pier structure and reducing the damage to the pier caused by excessive load transmitted by the moving formwork.

[0037] The first steel mesh 3 and the second steel mesh 4 can form a spatial grid, which significantly reduces the risk of shrinkage cracks around the reserved hole 100. Furthermore, the first steel mesh 3 covers the three vertical sidewalls of the reserved hole 100, which can effectively suppress cracks caused by temperature stress and shrinkage deformation, and improve the structural strength of the hole wall of the reserved hole 100.

[0038] The upper sleeve 51 and lower sleeve 52, which are connected to the cut-off outer pier column reinforcement, can be used to install the connecting main reinforcement 53, realizing the recoverable connection of the cut-off reinforcement. This can meet the needs of both temporary disconnection and permanent repair during construction, and achieve full life cycle reliability of the pier body reserved hole 100 area.

[0039] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A reinforcement structure for pre-drilled holes in a pier body, characterized in that, It includes two sets of reinforcing components respectively located on both sides of the reserved hole in the vertical direction. The reinforcing components include vertical reinforcing bars and horizontal reinforcing bars. Multiple vertical reinforcing bars are arranged side by side along the horizontal hole depth direction of the reserved hole. The horizontal reinforcing bars are perpendicularly connected to the vertical reinforcing bars, and multiple horizontal reinforcing bars are arranged side by side along the length direction of the vertical reinforcing bars.

2. The pier body pre-reserved hole reinforcement structure according to claim 1, characterized in that, The length of the vertical reinforcing bar is greater than the maximum vertical diameter of the reserved hole, and the horizontal reinforcing bar is greater than the horizontal depth of the reserved hole.

3. The pier body pre-reserved hole reinforcement structure according to claim 1, characterized in that, It also includes a first steel mesh, which is respectively set on two opposite vertical sides of the reserved hole and on the vertical bottom surface between the two vertical sides.

4. The pier body pre-reserved hole reinforcement structure according to claim 3, characterized in that, Multiple vertical reinforcing bars are also provided along the horizontal direction of the vertical bottom surface.

5. The pier body pre-reserved hole reinforcement structure according to claim 1, characterized in that, A second steel mesh is provided below the reserved hole. The second steel mesh is laid horizontally, and the vertical reinforcing main bar extends downward to the second steel mesh.

6. The pier body pre-reserved hole reinforcement structure according to claim 5, characterized in that, The second steel mesh is provided in multiple layers along the vertical direction of the pier body, and the multiple layers of the second steel mesh are arranged in parallel.

7. The pier body pre-reserved hole reinforcement structure according to claim 1, characterized in that, It also includes an upper sleeve and a lower sleeve, which are respectively connected to the ends of the pier column reinforcement cut off at the reserved holes, and the upper sleeve and the lower sleeve are detachably connected with connecting main reinforcement bars.

8. The pier body pre-reserved hole reinforcement structure according to claim 7, characterized in that, Both the upper and lower sleeves are threadedly connected to the main connecting bar, and the threads of the upper and lower sleeves rotate in opposite directions.

9. The pier body pre-reserved hole reinforcement structure according to claim 7, characterized in that, The upper connecting sleeve and the lower connecting sleeve are provided in multiple sets along the transverse diameter of the reserved hole, and the upper connecting sleeve and the lower connecting sleeve correspond one to one.

10. The pier body pre-reserved hole reinforcement structure according to claim 1, characterized in that, The vertical reinforcing bars are spaced 12.5cm apart, and the horizontal reinforcing bars are spaced 15cm apart.

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