Pier column reinforcing device and pier column reinforcing method
By installing hoops around the pier and embedding reinforcing bars, the problem of cumbersome construction and insufficient bearing capacity of existing reinforcement methods is solved, achieving efficient pier reinforcement and improving bearing capacity and durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGZHOU UNIVERSITY
- Filing Date
- 2024-12-12
- Publication Date
- 2026-06-12
AI Technical Summary
Existing pier reinforcement methods are cumbersome to construct, have long construction cycles, cannot effectively bear the internal forces caused by dead loads, and cannot change the internal force status of the pier under dead loads, resulting in insufficient long-term durability and bearing capacity.
By using hoop assemblies and rebar structures, hoop plates are installed around the outside of the pier and rebars are inserted. Combined with the connection structure and grouting repair, a reinforcement device that can participate in the stress is formed, realizing a three-dimensional stress state.
It improves the bearing capacity of the piers, reduces construction difficulty and time, and can effectively bear the internal forces caused by live loads and some dead loads, thus reducing long-term potential risks.
Smart Images
Figure CN119593321B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of building construction technology, and in particular to a pier reinforcement device and a pier reinforcement method. Background Technology
[0002] Piers are structures that support the superstructure of two adjacent spans, and their function is to reliably and effectively transfer the load of the superstructure to the foundation. However, as piers age, due to early defects or continuous changes in load and environment, piers are prone to defects such as concrete spalling, exposed rebar, and corrosion, and may even develop surface defects, which in turn affect the durability and load-bearing capacity of the piers.
[0003] To address the aforementioned problems, reinforcement of the piers is typically required. Common reinforcement methods include increasing the cross-sectional area and the jacket method. Increasing the cross-sectional area strengthens the pier by increasing its cross-sectional area. However, this traditional method requires formwork erection and dismantling, and the position of the outer formwork must be carefully controlled to ensure the pier is centered within the formwork and maintains a consistent reinforcement layer thickness. This process is cumbersome and time-consuming, causing significant inconvenience to construction workers. The jacket method involves covering the pier with a new layer of reinforcement material, forming a larger and stronger "jacket" for reinforcement. However, under normal circumstances, this "jacket" only functions as a formwork and does not bear load; it only participates in load-bearing when the pier undergoes significant structural deformation. Furthermore, both of the aforementioned reinforcement methods are passive reinforcements, implemented without applying external loads to the pier or altering its internal force distribution. They cannot unload the pier or change its dead load internal force condition. Therefore, the reinforced portion only bears the internal forces generated by live loads, not those generated by dead loads, thus limiting its ability to address internal forces caused by dead loads. Specifically, dead loads are long-term loads that continuously act on the structure. Passive reinforcement cannot effectively reduce or redistribute the internal forces caused by dead loads, thus failing to adequately address the potential risks to the pier under long-term dead loads. Summary of the Invention
[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a pier reinforcement device that can participate in stress to play a load-bearing role, thereby helping to improve the load-bearing capacity of the target pier.
[0005] This application also proposes a method for reinforcing piers using the aforementioned pier reinforcement device.
[0006] The pier reinforcement device according to the first aspect of this application includes:
[0007] A hoop assembly, comprising at least two hoops for cooperating with each other to form a ring structure, the hoops being arranged around the outer periphery of the target pier along the circumference of the target pier to cover the area of the target pier to be reinforced;
[0008] A connecting structure is disposed between two adjacent hoop plates, and the connecting structure is used to connect the two adjacent hoop plates;
[0009] The inner side of the hoop is provided with reinforcing bars for implantation into the target pier column.
[0010] The pier reinforcement device according to the embodiments of this application has at least the following beneficial effects: In use, holes are drilled in the area to be reinforced of the target pier according to the size and position of the reinforcing bars set on the inner side of the hoop plates of the hoop assembly. Then, each hoop plate is arranged around the outer periphery of the target pier along the circumference, and each reinforcing bar is embedded into the drilled holes one by one. Then, adjacent hoop plates are connected by a connecting structure to fix the hoop assembly to the area to be reinforced of the target pier. Finally, grout is poured into the damaged area of the target pier to repair the damaged area. In particular, by setting reinforcing bars on the inner side of the hoop plates for implantation into the target pier, the hoop assembly can participate in the stress and play a load-bearing role, thereby improving the load-bearing capacity of the target pier.
[0011] According to some embodiments of this application, at least one of the reinforcing bars disposed on the inner side of the hoop is T-shaped or L-shaped.
[0012] According to some embodiments of this application, at least one of the reinforcing bars disposed on the inner side of the hoop is in the shape of a straight rod.
[0013] According to some embodiments of this application, the hoop is provided with a grouting port.
[0014] According to some embodiments of this application, both the hoop and the connecting structure are prefabricated components.
[0015] According to some embodiments of this application, the clamp assembly consists of four clamp plates of the same size.
[0016] According to some embodiments of this application, any of the clamps is provided with a connecting lug at its edge for mating with an adjacent clamp, the connecting structure including a bolt and a nut, and the connecting lug is provided with a mounting through hole for the bolt to pass through.
[0017] According to some embodiments of this application, there is a preset assembly gap between two adjacent clamps and between two adjacent connecting ears.
[0018] According to some embodiments of this application, the connecting ear is provided with a plurality of mounting through holes at vertical intervals along its upper edge.
[0019] The pier reinforcement method according to the second aspect of this application, applied to the pier reinforcement device according to the first aspect of this application, includes the following steps:
[0020] Analyze the damage status of the target pier's reinforcement area and prepare corresponding clamping components;
[0021] Drill holes in the area to be reinforced of the target pier column according to the size and position of the reinforcing bars set on the inner side of the hoop plate of the hoop assembly.
[0022] Each hoop is placed around the outer perimeter of the target pier, and each rebar is embedded into the drilled hole in a corresponding manner.
[0023] Two adjacent hoops are connected by a connecting structure so that the hoop assembly is fixed to the area to be reinforced of the target pier column;
[0024] Grouting material is poured into the damaged areas of the target pier column that need reinforcement.
[0025] After the grouting material has reached the required age, prestress is applied to the area of the target pier to be reinforced through the connecting structure, so that the area of the target pier to be reinforced is in a triaxial stress state.
[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0028] Figure 1 This is a schematic diagram of the pier reinforcement device according to an embodiment of this application during use;
[0029] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;
[0030] Figure 3 This is a schematic diagram of the structure of a pier reinforcement device according to an embodiment of this application;
[0031] Figure 4 yes Figure 3 Enlarged view of a portion of point B in the middle;
[0032] Figure 5 yes Figure 1 Cross-sectional view of the structure shown;
[0033] Figure 6 yes Figure 5 A magnified view of a portion of point C in the middle.
[0034] Figure label:
[0035] Target pier a, repair section b, hoop 100, rebar 110, grouting port 120, connecting lug 130, bolt 200, nut 300. Detailed Implementation
[0036] 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.
[0037] In the description of this application, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0038] In the description of this application, if words such as several, greater than, less than, exceeding, above, below, or within appear, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, and "above," "below," "within," etc. are understood to include the number itself.
[0039] In the description of this application, the use of terms such as "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.
[0040] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0041] Piers are structures that support the superstructure of two adjacent spans, and their function is to reliably and effectively transfer the load of the superstructure to the foundation. However, as piers age, due to early defects or continuous changes in load and environment, piers are prone to defects such as concrete spalling, exposed rebar, and corrosion, and may even develop surface defects, which in turn affect the durability and load-bearing capacity of the piers.
[0042] To address the aforementioned problems, reinforcement of the piers is typically required. Common reinforcement methods include increasing the cross-sectional area and the jacket method. Increasing the cross-sectional area strengthens the pier by increasing its cross-sectional area. However, this traditional method requires formwork erection and dismantling, and the position of the outer formwork must be carefully controlled to ensure the pier is centered within the formwork and maintains a consistent reinforcement layer thickness. This process is cumbersome and time-consuming, causing significant inconvenience to construction workers. The jacket method involves covering the pier with a new layer of reinforcement material, forming a larger and stronger "jacket" for reinforcement. However, under normal circumstances, this "jacket" only functions as a formwork and does not bear load; it only participates in load-bearing when the pier undergoes significant structural deformation. Furthermore, both of the aforementioned reinforcement methods are passive reinforcements, implemented without applying external loads to the pier or altering its internal force distribution. They cannot unload the pier or change its dead load internal force condition. Therefore, the reinforced portion only bears the internal forces generated by live loads, not those generated by dead loads, thus limiting its ability to address internal forces caused by dead loads. Specifically, dead loads are long-term loads that continuously act on the structure. Passive reinforcement cannot effectively reduce or redistribute the internal forces caused by dead loads, thus failing to adequately address the potential risks to the pier under long-term dead loads.
[0043] Reference Figures 1 to 6 The pier reinforcement device according to an embodiment of this application includes a hoop assembly and a connecting structure.
[0044] Specifically, the hoop assembly includes at least two hoop plates 100 that cooperate with each other to form a ring structure. The hoop plates 100 are used to surround the outer periphery of the target pier a along the circumference to cover the area of the target pier a to be reinforced. A connecting structure is provided between two adjacent hoop plates 100 to connect the two adjacent hoop plates 100. The inner side of the hoop plate 100 is provided with a rebar 110 for implantation into the interior of the target pier a.
[0045] In use, holes are drilled in the area to be reinforced of the target pier a according to the size and position of the reinforcing bars 110 set on the inner side of the hoop plates 100 of the hoop assembly. Then, each hoop plate 100 is arranged around the outer periphery of the target pier a along its circumference, and each reinforcing bar 110 is embedded into the drilled holes one by one. Then, adjacent hoop plates 100 are connected by a connecting structure to fix the hoop assembly to the area to be reinforced of the target pier a. Finally, grout is poured into the damaged area of the target pier a to repair the damaged area. In particular, by setting the reinforcing bars 110 on the inner side of the hoop plates 100 for implantation into the interior of the target pier a, the hoop assembly can participate in the stress and play a load-bearing role, thereby improving the load-bearing capacity of the target pier a.
[0046] Reference Figures 3 to 6 In some embodiments, at least one reinforcing bar 110 disposed on the inner side of the hoop 100 is T-shaped, and this portion of the reinforcing bar 110 is used to embed inside the repair portion b formed by the poured grout. The T-shape of this portion of the reinforcing bar 110 helps to enhance the structural strength of the repair portion b formed by the poured grout. Furthermore, since it is not necessary to pre-drill holes for this portion of the reinforcing bar 110, it helps to reduce construction difficulty and thus improve construction efficiency.
[0047] It should be noted that in some other embodiments, the T-shaped rebar 110 can also be replaced with the L-shaped rebar 110, which is not limited here.
[0048] Reference Figures 3 to 6 In some embodiments, at least one reinforcing bar 110 provided on the inner side of the hoop 100 is in the shape of a straight bar, i.e., I-shaped. This part of the reinforcing bar 110 is used to be embedded in the interior of the original part of the target pier a, i.e. the area of the target pier a where no grouting material has been poured. Since it is necessary to drill holes for this part of the reinforcing bar 110 on the surface of the target pier a, the use of straight bar-shaped reinforcing bars 110 helps to reduce the difficulty of drilling, thereby improving construction efficiency.
[0049] Reference Figure 1 and Figure 3 In some embodiments, the hoop 100 is provided with a grouting port 120 to facilitate the pouring of grout into the damaged area of the target pier a. The size and position of the grouting port 120 can be adjusted according to the actual situation.
[0050] It should be noted that in some of the embodiments, both the hoop 100 and the connecting structure are prefabricated components, that is, both the hoop 100 and the connecting structure are prefabricated in the factory in advance, which helps to improve construction efficiency.
[0051] Reference Figure 3 and Figure 5 In some embodiments, the sleeve assembly consists of four identical hoop plates 100, which helps to reduce the span of the same hoop plate 100, thereby reducing the difference in orientation between different rebars on the same hoop plate 100, and making it easier to embed the rebar 110 into the drilled hole, which helps to reduce construction difficulty and improve construction efficiency.
[0052] Reference Figures 1 to 6 In some embodiments, any hoop 100 is provided with a connecting lug 130 at the edge for engaging with an adjacent hoop 100. The connecting structure includes a bolt 200 and a nut 300. The connecting lug 130 is provided with a mounting through hole (not shown in the figure) for the bolt 200 to pass through. Its structure is simple and easy to implement.
[0053] It should be noted that in some embodiments, there is a preset assembly gap between two adjacent hoop plates 100 and between two adjacent connecting ears 130. This allows prestress to be applied to the area to be reinforced of the target pier a by tightening the nut 300 on the bolt 200, so that the area to be reinforced of the target pier a is under triaxial stress. This allows the repair part b formed by the poured grout to not only withstand the internal forces generated by live loads but also the internal forces generated by some dead loads, thereby helping to reduce the potential risks of the target pier a under long-term dead loads.
[0054] It should be noted that in some embodiments, multiple mounting through holes are provided vertically spaced on the connecting lug 130, so that multiple bolts 200 with matching nuts 300 can be installed between two adjacent connecting lugs 130. This not only improves the stability and reliability of the structure, but also facilitates the application of prestress to the area to be reinforced of the target pier a through the bolts 200 and nuts 300.
[0055] It should be noted that in some other embodiments, the connecting structure may also use iron wire, which is not limited here. Specifically, the various hoops 100 are tied together and fixed to the area to be reinforced of the target pier a by iron wire. At the same time, prestress can be applied by increasing the tightness of the tied iron wire.
[0056] The pier reinforcement method according to the embodiments of this application, applied to the above-mentioned pier reinforcement device, includes the following steps:
[0057] Analyze the damage status of the area to be reinforced in the target pier a, and prepare the corresponding hoop assembly;
[0058] Based on the size and position of the reinforcing bar 110 set on the inner side of the hoop 100 of the hoop assembly, drill holes in the area to be reinforced of the target pier a.
[0059] Each hoop 100 is arranged around the outer periphery of the target pier a along the circumference of the target pier a, and each rebar 110 is embedded into the drilled hole in a corresponding manner.
[0060] Two adjacent hoop plates 100 are connected by a connecting structure so that the hoop assembly is fixed to the area to be reinforced of the target pier a;
[0061] Grouting material is poured into the damaged area of the target pier a to be reinforced;
[0062] After the grouting material has reached the required age, prestress is applied to the area to be reinforced of the target pier a through the connecting structure, so that the area to be reinforced of the target pier a is in a triaxial stress state.
[0063] Specifically, by applying radial prestress to the area to be reinforced of the target pier a through the connecting structure, in conjunction with the axial load and bending moment of the target pier a, the area to be reinforced of the target pier a can be placed in a triaxial stress state.
[0064] It should be noted that, in some embodiments, before pouring grout into the damaged area of the target pier a, a gap is left between the inner wall of the hoop 100 and the surface of the target pier a for pouring grout, so that the poured grout can fill the damaged area of the target pier a.
[0065] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0066] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A method for reinforcing pier columns, characterized in that, Applied to a pier reinforcement device, the pier reinforcement device includes: A hoop assembly, comprising at least two hoops for cooperating with each other to form a ring structure, the hoops being arranged around the outer periphery of the target pier along the circumference of the target pier to cover the area of the target pier to be reinforced; A connecting structure is disposed between two adjacent hoop plates, and the connecting structure is used to connect the two adjacent hoop plates; The inner side of the hoop is provided with a rebar for implantation into the target pier column; The pier reinforcement method includes the following steps: Analyze the damage status of the target pier's reinforcement area and prepare corresponding clamping components; Drill holes in the area of the target pier column to be reinforced, based on the size and position of the reinforcing bars set on the inner side of the clamp plate of the clamp assembly. Each hoop is placed around the outer perimeter of the target pier along the circumference of the target pier, and each rebar is embedded into the drilled hole in a corresponding manner. Two adjacent hoops are connected by a connecting structure so that the hoop assembly is fixed to the area to be reinforced of the target pier column; Grouting material is poured into the damaged areas of the target pier column that need reinforcement. After the grouting material has reached the required age, prestress is applied to the area of the target pier to be reinforced through the connecting structure so that the area of the target pier to be reinforced is in a triaxial stress state. At least one of the reinforcing bars provided on the inner side of the hoop is T-shaped or L-shaped, and this portion of the reinforcing bar is only embedded in the interior of the repair portion formed by the poured grout. At least one of the reinforcing bars provided on the inner side of the hoop is in the shape of a straight rod. This part of the reinforcing bar is embedded in the interior of the original part of the target pier, that is, the area of the target pier where no grout has been poured. The hoop is provided with a grouting port; The clamp assembly consists of four clamp plates of the same size.
2. The pier reinforcement method as described in claim 1, characterized in that, Both the hoop and the connecting structure are prefabricated components.
3. The pier reinforcement method as described in claim 1 or 2, characterized in that, Each of the clamps has a connecting lug at its edge for mating with an adjacent clamp, the connecting structure including a bolt and a nut, and the connecting lug having a mounting through hole for the bolt to pass through.
4. The pier reinforcement method as described in claim 3, characterized in that, There is a preset assembly gap between two adjacent clamps, and there is a preset assembly gap between two adjacent connecting ears.
5. The pier reinforcement method as described in claim 4, characterized in that, The connecting ear has multiple mounting through holes spaced vertically along its upper edge.