Reinforcing structure based on UHPC (Ultra High Performance Concrete)

Abstract

The invention discloses a reinforcing structure based on UHPC (Ultra High Performance Concrete), and relates to the technical field of repairing and reinforcing of original buildings. The strength and the stability of the integral structure formed by the reinforced structure and the workpiece are improved through the ultra-high performance concrete; the first reinforcing unit is located in the UHPC; the first reinforcing units and the UHPC can bear external loads together and deform together under the action of the external loads, and the flexural rigidity, the shear strength and the bearing capacity of an overall structure formed by the reinforcing structure and a workpiece are remarkably improved; the first end of the second reinforcing unit extends into the ultra-high-performance concrete, the second end of the second reinforcing unit extends into the workpiece, the binding force and integrity between the workpiece and the ultra-high-performance concrete are improved, the rigidity of an overall structure formed by the reinforcing structure and the workpiece is improved, the first reinforcing unit abuts against the second reinforcing unit, and therefore the reinforcing effect is improved. It is guaranteed that the overall structure formed by the reinforcing structure and the workpiece has good stability and bearing capacity.

Description

Technical Field

[0001] The invention relates to the technical field of repair and reinforcement of original buildings, and in particular to a reinforcement structure based on UHPC. Background Art

[0002] Due to external forces such as earthquakes, long service life, design or construction defects, etc., existing concrete beams and other load-bearing components are prone to different types of damage, which reduces their strength, causing the load-bearing components to be out of service and unable to continue to serve. Therefore, how to improve the strength of existing concrete beams and other load-bearing components has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a UHPC-based reinforcement structure to effectively improve the strength of existing concrete beams and other workpieces.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a UHPC-based reinforcement structure, the reinforcement structure comprising:

[0006] Ultra-high performance concrete, which is used for post-casting in the area to be reinforced of the workpiece;

[0007] a first reinforcement unit, wherein the first reinforcement unit is located in the ultra-high performance concrete;

[0008] A second reinforcement unit, wherein a first end of the second reinforcement unit extends into the ultra-high performance concrete, a second end of the second reinforcement unit extends into the workpiece, and the first reinforcement unit and the second reinforcement unit are in contact with each other.

[0009] Preferably, the first reinforcement unit includes a first reinforcement component, a second reinforcement component and a third reinforcement component, the first reinforcement component, the second reinforcement component and the third reinforcement component are all abutted against the second reinforcement unit; the first reinforcement component and the third reinforcement component are arranged along the first direction of the ultra-high performance concrete, and the second reinforcement component is arranged along the second direction of the ultra-high performance concrete; at least two of the first reinforcement component, the third reinforcement component and the second reinforcement component are in contact.

[0010] Preferably, the first direction and the second direction are perpendicular;

[0011] And / or, the first direction and the second direction are both perpendicular to the direction in which the second reinforcement unit extends into the workpiece.

[0012] Preferably, the first reinforcing component is provided on a side of the second reinforcing component close to or far from the workpiece, and the third reinforcing component is provided on a side of the second reinforcing component opposite to the first reinforcing component;

[0013] Alternatively, the third reinforcement component is sleeved on the outside of the second reinforcement component.

[0014] Preferably, the third reinforcing component includes a first reinforcing member provided at both ends of the second reinforcing component, and a second reinforcing member provided between both ends of the second reinforcing component, the first reinforcing member includes a rectangular hoop, and the second reinforcing member includes a dish-shaped hoop.

[0015] Preferably, a bonding layer is provided between the ultra-high performance concrete and the workpiece;

[0016] And / or, the first reinforcement unit further includes a fourth reinforcement component, and the fourth reinforcement component is arranged along the third direction of the ultra-high performance concrete;

[0017] And / or, the first end of the second reinforcement unit is located in the ultra-high performance concrete; wherein the second end of the second reinforcement unit extends out of the workpiece, the second end of the second reinforcement unit is provided with a fastener, or the second end of the second reinforcement unit is located in the workpiece;

[0018] And / or, the first reinforcement unit and / or the second reinforcement unit are connected to an existing reinforcement member in the workpiece;

[0019] And / or, a third reinforcement unit is provided on a side of the ultra-high performance concrete away from the workpiece and / or close to the workpiece, and the reinforcement structure also includes a connecting member, which applies a first force to the third reinforcement unit and the ultra-high performance concrete, and the first force connects the third reinforcement unit and the ultra-high performance concrete together.

[0020] Preferably, the first reinforcement unit and the second reinforcement unit are fixedly connected; and / or, the contact area between the first reinforcement unit and the second reinforcement unit includes a toothed surface or a groove; and / or, the contact area between the second reinforcement unit and the ultra-high performance concrete and the workpiece is provided with a flexible connector; and / or, the contact area between the first reinforcement unit and the second reinforcement unit is provided with a damping layer.

[0021] Preferably, the first reinforcement and the second reinforcement are spaced apart along the first direction, and the distribution density of the first reinforcement gradually decreases from the direction away from the end of the second reinforcement component toward the direction close to the end of the second reinforcement component, and the distribution density of the second reinforcement gradually increases from the direction close to the end of the second reinforcement component toward the direction away from the end of the second reinforcement component.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] After pouring ultra-high performance concrete in the area to be reinforced of the workpiece, such as the damaged area and / or the vulnerable area, ① since the ultra-high performance concrete itself has relatively excellent tensile properties, the overall structure formed by the reinforced structure and the workpiece has stronger tensile properties than a single workpiece (for the sake of simplicity, the overall structure formed by the reinforced structure and the workpiece will be referred to as the overall structure below), so that the overall structure can better resist cracking or failure caused by negative bending moment; ② since the ultra-high performance concrete also has high compressive strength, the overall structure can withstand greater loads and shear forces than a single workpiece, thereby improving the compressive strength of the overall structure. Strength; ③ Compared with the workpiece, the overall structure increases the effective height of the positive section of the overall structure in the direction from the ultra-high performance concrete to the workpiece, and reduces the neutral axis height of the overall structure (the neutral axis refers to the intersection of the stress plane and the cross section of the workpiece. The neutral axis is neither compressed nor tensile. The area above the neutral axis is the compression zone, and the area below the neutral axis is the tension zone). The compression zone section of the overall structure is increased, the compression resistance is improved, the compression zone section is reduced, and the tensile stress is reduced, so that the deflection deformation of the overall structure under the same load is reduced, and it has higher bending resistance; Based on the above content, it can be seen that ultra-high performance concrete improves the strength and stability of the overall structure;

[0024] Furthermore, the present invention provides a first reinforcement unit in the ultra-high performance concrete, so that the periphery of the first reinforcement unit is in contact with the ultra-high performance concrete, the interface between the first reinforcement unit and the ultra-high performance concrete is more tightly bonded, the first reinforcement unit and the ultra-high performance concrete can jointly bear external loads, and deform together under the action of external loads, thereby significantly improving the bending stiffness, shear strength and bearing capacity of the overall structure;

[0025] In the present invention, the first end of the second reinforcement unit extends into the ultra-high performance concrete, and the second end of the second reinforcement unit extends into the workpiece, so that the workpiece and the ultra-high performance concrete are connected together not only by the bonding force of the ultra-high performance concrete, but also by the second reinforcement unit, thereby reducing the relative slippage that may occur between the interface of the workpiece and the ultra-high performance concrete, improving the bonding force and integrity between the workpiece and the ultra-high performance concrete, and the rigidity of the overall structure. The area where the second reinforcement unit is located in the ultra-high performance concrete and the workpiece provides pull-out resistance, delays the occurrence of shear failure at the interface between the ultra-high performance concrete and the workpiece, and enhances the shear resistance of the overall structure. The second reinforcement unit serves as a transfer path between the ultra-high performance concrete and the workpiece, so that the load on the workpiece and the ultra-high performance concrete can be more evenly distributed to the overall structure, reducing the stress concentration at the interface between the ultra-high performance concrete and the workpiece, and delaying the damage caused by the cumulative effect of dynamic loads.

[0026] Furthermore, in the present invention, the first reinforcement unit and the second reinforcement unit are in contact with each other, so that the loads on the first reinforcement unit and the second reinforcement unit can be directly transmitted to each other, thereby ensuring the stability and bearing capacity of the overall structure, and avoiding the problem that the force on the first reinforcement unit or the second reinforcement unit cannot be effectively transmitted through the ultra-high performance concrete due to insufficient bonding force or force transmission capacity of the ultra-high performance concrete, and the stress is concentrated in certain areas of the ultra-high performance concrete, causing the ultra-high performance concrete to slip relative to the first reinforcement unit or the second reinforcement unit, thereby reducing the bearing capacity of the overall structure;

[0027] In summary, the reinforcement structure in the present invention effectively improves the strength of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the UHPC-based reinforcement structure;

[0030] Figure 2 It is a schematic diagram of the structure of the UHPC-based reinforcement structure with a mold;

[0031] Figure 3 for Figure 1 AA section view;

[0032] Figure 4 for Figure 2 BB cross-section diagram;

[0033] Figure 5 for Figure 1 CC profile of ;

[0034] Figure 6 for Figure 2 DD profile diagram;

[0035] Figure 7 for Figure 3 EE profile diagram;

[0036] Figure 8 for Figure 4 FF cross-section diagram;

[0037] Fig. 9 It is a schematic diagram of the bottom of the UHPC-based reinforcement structure;

[0038] Fig.10 is a bottom schematic diagram of a UHPC-based reinforcement structure with a mold;

[0039] Fig.11 This is the bottom structural diagram of the existing concrete beam;

[0040] Fig.12 is a structural schematic diagram of a first reinforcement component;

[0041] Fig.13 is a schematic structural diagram of a first reinforcement member;

[0042] Fig.14 is a schematic structural diagram of a second reinforcement member;

[0043] Fig.15 Schematic diagram of the structure of the mold;

[0044] Fig.16 is a schematic structural diagram of a second reinforcement unit;

[0045] Fig.17 It is a structural diagram of the reinforcing rib;

[0046] Among them, 1. workpiece; 2. ultra-high performance concrete; 3. first reinforcement component; 4. second reinforcement component; 5. first reinforcement member; 6. second reinforcement member; 7. second reinforcement unit; 8. first fastener; 9. second support plate; 10. sealing plate; 11. support rib; 12. height limit plate; 13. first mounting hole; 14. second mounting hole; 15. third mounting hole; 16. fourth mounting hole; 17. second fastener; 18. first support member; 19. second support member; 20. partitioned ultra-high performance concrete. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] like Figure 1 to Figure 17 As shown, the present invention discloses a reinforcement structure based on ultra-high performance concrete UHPC, the reinforcement structure comprising: ultra-high performance concrete, the ultra-high performance concrete 2 is used for post-casting in the area to be reinforced of the workpiece 1; a first reinforcement unit, the first reinforcement unit is located in the ultra-high performance concrete 2; a second reinforcement unit 7, the first end of the second reinforcement unit 7 extends into the ultra-high performance concrete 2, the second end of the second reinforcement unit 7 extends into the workpiece 1, and the first reinforcement unit and the second reinforcement unit 7 are abutted.

[0050] In this article, the full English name of ultra-high performance concrete is Ultra-High Performance Concrete, abbreviated as UHPC.

[0051] After pouring the ultra-high performance concrete 2 in the area to be reinforced of the workpiece 1, such as the damaged area and / or the vulnerable area, ① since the ultra-high performance concrete 2 itself has relatively excellent tensile properties, the overall structure formed by the reinforced structure and the workpiece 1 has stronger tensile properties than the single workpiece 1 (for the sake of simplicity, the overall structure formed by the reinforced structure and the workpiece 1 will be referred to as the overall structure below), so that the overall structure can better resist cracking or failure caused by negative bending moment; ② since the ultra-high performance concrete 2 also has high compressive strength, the overall structure can withstand greater loads and shear forces than the single workpiece 1, thereby improving the compressive strength of the overall structure; ③ compared with the workpiece 1, the overall structure improves the tensile strength of the ultra-high performance concrete 2. 2 is directed toward the workpiece 1, i.e., the effective height of the positive section of the overall structure, which reduces the height of the neutral axis of the overall structure (the neutral axis refers to the intersection of the stress plane and the cross section of the workpiece 1, the neutral axis is neither compressed nor tensile, the area above the neutral axis is the compression zone, and the area below the neutral axis is the tension zone), increases the compression zone section of the overall structure, improves the compressive capacity, reduces the compression zone section, reduces the tensile stress, reduces the deflection deformation of the overall structure under the same load, has higher bending resistance, and significantly improves the bearing capacity, stiffness and crack resistance of the workpiece 1, wherein the bearing capacity can be increased by about 60%, the stiffness can be increased by nearly 1 times, and the cracking load is increased by an average of 3 times; based on the above content, it can be seen that the ultra-high performance concrete 2 improves the strength and stability of the overall structure;

[0052] Furthermore, the present invention provides a first reinforcement unit in the ultra-high performance concrete 2, so that the periphery of the first reinforcement unit is in contact with the ultra-high performance concrete 2, the interface between the first reinforcement unit and the ultra-high performance concrete 2 is more tightly bonded, the first reinforcement unit and the ultra-high performance concrete 2 can jointly bear external loads, and deform together under the action of external loads, which significantly improves the bending stiffness, shear strength and bearing capacity of the overall structure;

[0053] In the present invention, the first end of the second reinforcement unit 7 extends into the ultra-high performance concrete 2, and the second end of the second reinforcement unit 7 extends into the workpiece 1, so that the workpiece 1 and the ultra-high performance concrete 2 are connected together not only by the bonding force of the ultra-high performance concrete 2, but also by the second reinforcement unit 7, thereby reducing the relative slip that may occur between the interface of the workpiece 1 and the ultra-high performance concrete 2, improving the bonding force and integrity between the workpiece 1 and the ultra-high performance concrete 2, and the rigidity of the overall structure. The second reinforcement unit 7 is located in the area of ​​the ultra-high performance concrete 2 and the workpiece 1 to provide pull-out resistance, delay the occurrence of shear failure at the interface between the ultra-high performance concrete 2 and the workpiece 1, and enhance the shear resistance of the overall structure. The second reinforcement unit 7 serves as a transfer path between the ultra-high performance concrete 2 and the workpiece 1, so that the load on the workpiece 1 and the ultra-high performance concrete 2 can be more evenly distributed to the overall structure, reducing the stress concentration at the interface between the ultra-high performance concrete 2 and the workpiece 1, and delaying the damage caused by the cumulative effect of dynamic loads.

[0054] Furthermore, in the present invention, the first reinforcement unit and the second reinforcement unit 7 are in contact with each other, so that the loads on the first reinforcement unit and the second reinforcement unit 7 can be directly transmitted to each other, thereby ensuring the stability and bearing capacity of the overall structure, and avoiding the problem that the force on the first reinforcement unit or the second reinforcement unit 7 cannot be effectively transmitted through the ultra-high performance concrete 2 due to insufficient bonding force or force transmission capacity of the ultra-high performance concrete 2, and the stress is concentrated in certain areas of the ultra-high performance concrete 2, causing the ultra-high performance concrete 2 to slip relative to the first reinforcement unit or the second reinforcement unit 7, thereby reducing the bearing capacity of the overall structure;

[0055] In summary, the reinforcement structure in the present invention effectively improves the strength of the overall structure.

[0056] The workpiece 1 may be a concrete beam, a concrete column, or a load-bearing member made of other materials that can be post-cast with ultra-high performance concrete 2. The area to be reinforced of the workpiece 1 includes the damaged area and / or the vulnerable area of ​​the workpiece 1. The second reinforcement unit 7 may be a bolt or FRP (FRP refers to fiber reinforced polymer, the full name of which is FRP for short) and other structures.

[0057] The first reinforcement unit includes a first reinforcement component 3, a second reinforcement component 4 and a third reinforcement component. The first reinforcement component 3, the second reinforcement component 4 and the third reinforcement component are all abutted against the second reinforcement unit 7; the first reinforcement component 3 and the third reinforcement component are arranged along the first direction of the ultra-high performance concrete 2, and the second reinforcement component 4 is arranged along the second direction of the ultra-high performance concrete 2.

[0058] The first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component can be specifically steel bars, steel plates, steel meshes, or other types of structures that can improve the strength of the ultra-high performance concrete 2, including tensile strength, compressive strength, shear strength, etc., as long as the first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component can at least improve the strength of the ultra-high performance concrete 2 in one aspect. The first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component may not contact each other, or at least two of them may contact each other. The first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component may extend along the longitudinal or transverse direction of the ultra-high performance concrete 2, and the first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component have a variety of shapes, such as the first reinforcing component 3, the second reinforcing component 4 and the third reinforcing component may be flat, such as a steel plate, or mesh, such as a steel mesh, or ring-shaped, such as a ring-shaped steel plate or a ring-shaped steel mesh. The first direction and the second direction can be arranged vertically, in parallel, or at a certain angle. For example, the first direction and the second direction can be arranged along the longitudinal direction or the transverse direction of the ultra-high performance concrete 2.

[0059] It should be understood that as long as the arrangement of the first reinforcement assembly 3, the second reinforcement assembly 4 and the third reinforcement assembly can improve the ultra-high performance concrete 2 and the overall structural strength, the shape, arrangement, material, etc. of the first reinforcement assembly 3, the second reinforcement assembly 4 and the third reinforcement assembly are not limited to the above contents. The specific arrangement method and the number of the first reinforcement unit depend on the working conditions. The first reinforcement unit includes a plurality of first reinforcement assemblies 3, a plurality of second reinforcement assemblies 4 and a plurality of third reinforcement assemblies. And adjacent first reinforcement assemblies 3 or second reinforcement assemblies 4 or third reinforcement assemblies can be arranged in parallel or at a certain angle.

[0060] In the present invention, the first reinforcement component 3 and the third reinforcement component are perpendicular to the second reinforcement component 4, that is, the first direction and the second direction are perpendicular, which enables the first reinforcement component 3, the second reinforcement component 4, and the third reinforcement component to form a grid-like reinforcement skeleton, effectively improving the stiffness of the ultra-high performance concrete 2, and improving the bending resistance, shear resistance, and the ability to resist torques and dynamic loads in multiple directions; and / or, the first direction and the second direction are perpendicular to the direction in which the second reinforcement unit 7 extends into the workpiece 1, which forms a multi-directional support, and provides multi-directional constraints on the interface between the ultra-high performance concrete 2 and the workpiece 1. When an external force attempts to make the workpiece 1 slip relative to the ultra-high performance concrete 2, the first reinforcement component 3, the second reinforcement component 4 and the third reinforcement component play a role in resisting peeling, can better transfer and disperse the load, and improve the shear resistance, crack resistance, anti-slip and other properties of the overall structure.

[0061] And / or, at least two of the first reinforcement component 3, the third reinforcement component, and the second reinforcement component 4 are in contact, which includes ① the first reinforcement component 3 and the third reinforcement component are both connected to the second reinforcement component 4; ② the first reinforcement component 3, the second reinforcement component 4 and the third reinforcement component are in contact with each other, etc., which improves the load transfer efficiency between the first reinforcement component 3, the third reinforcement component and the second reinforcement component 4, and enhances the stiffness and bearing capacity of the overall structure.

[0062] The first reinforcement unit includes a plurality of second reinforcement components 4 of ultra-high performance concrete 2 arranged in parallel along a first direction.

[0063] The first reinforcement component 3 is provided on the side of the second reinforcement component 4 close to the workpiece 1 or away from the workpiece 1, and the third reinforcement component is provided on the side of the second reinforcement component 4 opposite to the first reinforcement component 3; in other words, when the first reinforcement component 3 is provided on the side of the second reinforcement component 4 close to the workpiece 1, the third reinforcement component is provided on the side of the second reinforcement component 4 away from the workpiece 1, and when the first reinforcement component 3 is provided on the side of the second reinforcement component 4 away from the workpiece 1, the third reinforcement component is provided on the side of the second reinforcement component 4 close to the workpiece 1. When the third reinforcement component is provided on the side of the second reinforcement component 4 close to or away from the workpiece 1, the first reinforcement member 5 and the second reinforcement member 6 of the third reinforcement component can be overlapped with the second reinforcement component 4, and the second reinforcement component 4 and the third reinforcement component can be connected together by welding or binding.

[0064] Alternatively, the third reinforcement component may not adopt the above-mentioned setting method, and the third reinforcement component may be sleeved on the outside of the second reinforcement component 4. In this case, the third reinforcement component may specifically be a hoop or the like that can be sleeved on the outside of the second reinforcement component 4 and has an annular structure.

[0065] like Figure 3 , Figures 5 to 9 , Fig.13 , Fig.14As shown, the third reinforcement component includes a first reinforcement member 5 provided at both ends of the second reinforcement component 4, and a second reinforcement member 6 provided between the two ends of the second reinforcement component 4, the first reinforcement member 5 includes a rectangular hoop, and the second reinforcement member 6 includes a dish-shaped hoop. The two ends of the second reinforcement component 4 do not only refer to the ends of the second reinforcement component 4, but include the ends of the second reinforcement component 4 and the area away from the middle part of the second reinforcement component 4. Similarly, the area between the two ends of the second reinforcement component 4 does not only refer to the middle area of ​​the second reinforcement component 4, but includes the middle area of ​​the second reinforcement component 4 and the area close to the middle part of the second reinforcement component 4. The first reinforcement member 5 is not limited to the above-mentioned form, and can also be set as a reinforcement member of other shapes. When the first reinforcement member 5 and the second reinforcement member 6 are a closed ring structure, the first reinforcement member 5 and the second reinforcement member 6 provide lateral support through lateral restraining force, reduce the excessive deformation of the local area of ​​the ultra-high performance concrete 2 due to compressive stress, and enhance the compressive resistance of the overall structure. Moreover, in the present invention, the first reinforcement 5 and the second reinforcement 6 are arranged at intervals along the first direction, the distribution density of the first reinforcement 5 gradually decreases from the direction away from the end of the second reinforcement component 4 to the direction close to the end of the second reinforcement component 4, and the distribution density of the second reinforcement 6 gradually increases from the direction close to the end of the second reinforcement component 4 to the direction away from the end of the second reinforcement component 4, which reduces the number of the first reinforcement 5 and the second reinforcement 6 while ensuring the overall structural strength requirements, and reduces the installation complexity and installation cost of the combined structure formed by the first reinforcement 5, the second reinforcement 6 and the second reinforcement component 4 in the present invention compared with the steel mesh in the prior art. In addition, the number of first reinforcement units can be concentrated in the stress-bearing area of ​​UHPC, and the number of first reinforcement units can be reduced in the non-stress-bearing area or weak stress area of ​​UHPC.

[0066] In the present invention, a bonding layer is provided between the ultra-high performance concrete 2 and the workpiece 1, and the bonding layer is specifically a material that can improve the bonding force between the ultra-high performance concrete 2 and the workpiece 1, such as an interface agent made of vinyl acetate-ethylene; and / or, the first reinforcement unit may not include the above-mentioned first reinforcement component 3, second reinforcement component 4 and third reinforcement component. In this case, the first reinforcement unit only includes a fourth reinforcement component, and the fourth reinforcement component is arranged along the third direction of the ultra-high performance concrete 2. The third direction can be specifically the longitudinal direction of the ultra-high performance concrete 2, or the transverse direction, or the direction from the ultra-high performance concrete 2 toward the workpiece 1, etc. The fourth reinforcement component can specifically extend along the longitudinal direction of the ultra-high performance concrete 2 and the transverse direction of the ultra-high performance concrete 2. The fourth reinforcement component can specifically be a steel bar, a steel mesh, a steel plate or other components that can improve the overall structural strength;

[0067] like Figures 1 to 10 , Fig.16As shown, and / or, the first end of the second reinforcement unit 7 is located in the ultra-high performance concrete 2; wherein, the second end of the second reinforcement unit 7 extends out of the workpiece 1, and a fastener such as a bolt is provided at the second end of the second reinforcement unit 7. At this time, the second end of the second reinforcement unit 7 can be connected to an external prestressed anchor device or a support rod, thereby enhancing the shear resistance of the overall structure; or, the second end of the second reinforcement unit 7 is located in the workpiece 1, which includes the second end of the second reinforcement unit 7 being flush with a side of the workpiece 1 away from the ultra-high performance concrete 2, and there being a gap between the second end of the second reinforcement unit 7 and a side of the workpiece 1 away from the ultra-high performance concrete 2, thereby improving the strength and pull-out resistance of the overall structure;

[0068] And / or, the first reinforcement unit and / or the second reinforcement unit 7 are connected to the existing reinforcement members in the workpiece 1, which improves the integrity between the reinforcement structure and the workpiece 1, so that the load on the workpiece 1 can be effectively dispersed to the reinforcement structure, realizing the coordinated work of the workpiece 1 and the reinforcement structure, and improving the shear, tension and bending resistance of the overall structure; the existing reinforcement member refers to a reinforcement structure such as a reinforcement rib that already exists in the workpiece 1 before the reinforcement structure of the present invention is adopted, and the first reinforcement unit and / or the second reinforcement unit 7 can be connected to the existing reinforcement member in the workpiece 1 by welding or the like;

[0069] And / or, a third reinforcement unit is provided on the side of the ultra-high performance concrete 2 away from the workpiece 1 and / or close to the workpiece 1, and the reinforcement structure also includes a connecting member, which applies a first force to the third reinforcement unit and the ultra-high performance concrete 2, and the first force connects the third reinforcement unit and the ultra-high performance concrete 2 together; because the side of the ultra-high performance concrete 2 away from the workpiece 1 is usually in a tensile zone, the third reinforcement unit is provided on the side of the ultra-high performance concrete 2 away from the workpiece 1, which improves the tensile strength and bending stiffness of the ultra-high performance concrete 2; because the side of the ultra-high performance concrete 2 close to the workpiece 1 is usually a compressive zone, the third reinforcement unit provided on the side of the ultra-high performance concrete 2 close to the workpiece 1 disperses the compressive stress of the ultra-high performance concrete 2, reduces local stress concentration, and improves the compressive resistance; the third reinforcement unit can be specifically a flat support plate, or a corrugated support plate, and the corrugated support plate refers to a steel plate or other type of support plate with a corrugated cross-section formed along the width direction of the plate; the connecting member can be specifically a bonding layer provided between the third reinforcement unit and the ultra-high performance concrete 2, or a structure such as anchor bolts passing through the ultra-high performance concrete 2 and the third reinforcement unit.

[0070] In addition, in the present invention, the first reinforcement unit and the second reinforcement unit 7 are fixedly connected, and the specific connection method can be welding, bolt connection, etc., which improves the integrity and stability between the first reinforcement unit and the second reinforcement unit 7, reduces the relative slip or separation of the contact area between the first reinforcement unit and the second reinforcement unit 7 under high load, and improves the stiffness and bearing capacity of the overall structure; and / or, the contact area between the first reinforcement unit and the second reinforcement unit 7 includes a toothed surface or a groove, compared with a single-point contact, which increases the contact area between the first reinforcement unit and the second reinforcement unit 7, enhances the bite force between the first reinforcement unit and the second reinforcement unit 7, makes the two less likely to have relative displacement, and ensures the stability of the overall structure; and / or, flexible connectors are provided in the contact areas between the second reinforcement unit 7 and the ultra-high performance concrete 2, the workpiece 1, and the stress concentration problem between the second reinforcement unit 7 and the ultra-high performance concrete 2, the workpiece 1 is alleviated by the flexible connector, and the flexible connector can be a structure with good tensile properties such as a spring or a polymer-based composite material. And / or, a damping layer is provided in the contact area between the first reinforcement unit and the second reinforcement unit 7. The damping layer may specifically be a rubber layer, a polyurethane layer, a polytetrafluoroethylene layer, or a damping layer formed of an aluminum alloy or a copper alloy, which is provided in the contact area between the first reinforcement unit and the second reinforcement unit 7.

[0071] The present invention discloses a connection structure of a reinforcement structure and a region to be reinforced of a workpiece 1, and a setting method of a connection structure of internal components of the reinforcement structure, wherein the first reinforcement unit comprises a first reinforcement component 3 and a third reinforcement component arranged along a first direction, and a second reinforcement component 4 arranged along a second direction: Fig.11 As shown, the area to be reinforced of the workpiece 1, for example, the bottom of the existing concrete beam, is provided with a plurality of first mounting holes 13; the first reinforcement unit includes a plurality of first reinforcement components 3 arranged along the first direction of the ultra-high performance concrete 2, i.e., the longitudinal direction of the ultra-high performance concrete 2, and all the first reinforcement components 3 are located in the same plane, i.e., at the same height, as shown in FIG. Fig.12 As shown, the first reinforcement component 3 is provided with a plurality of second mounting holes 14 matching the first mounting holes 13 .

[0072] like Fig.15 , Fig.17As shown, the present invention discloses a mold for forming the reinforcement structure mentioned above, the mold comprises a first support plate, two groups of second support plates 9 are respectively provided on the side of the first support plate facing the workpiece 1, when the mold is installed to the area to be reinforced of the workpiece 1, a group of first support plates are respectively provided on both sides of the workpiece 1, the second support plates 9 are inclined relative to the first support plates, and the first support plates and the second support plates 9 form a groove with a trapezoidal longitudinal section; a plurality of support ribs 11 arranged along the longitudinal direction of the ultra-high performance concrete 2, i.e., the first direction, are provided below the first support plate, a plurality of third mounting holes 15 matching the second mounting holes 14 are provided on the first support plate, and a plurality of third mounting holes 15 matching the third mounting holes 15 are provided on the support ribs 11 Four mounting holes 16; among them, the first mounting hole 13, the second mounting hole 14, the third mounting hole 15 and the fourth mounting hole 16 match each other, which specifically means that the first end of the fifth reinforcement unit can pass through the first mounting hole 13, the second mounting hole 14, the third mounting hole 15 and the fourth mounting hole 16 in sequence, and extend into the workpiece 1, and the first fastener 8 is arranged at the second end of the fifth reinforcement unit on the side of the mold away from the workpiece 1. Through the cooperation of the first mounting hole 13, the second mounting hole 14, the third mounting hole 15, the fourth mounting hole 16, the first fastener 8 and the fifth reinforcement unit, the mold can be fixed at the area to be reinforced of the workpiece 1, so as to arrange the first reinforcement unit and pour the ultra-high performance concrete 2 later.

[0073] In the present invention, the length of the fifth reinforcement unit in the direction from the ultra-high performance concrete 2 toward the workpiece 1 is greater than the sum of the depth of the first mounting hole 13, the height of the ultra-high performance concrete 2, and the height of the mold, so that the mold can be fixed at the area to be reinforced of the workpiece 1 (the mold height specifically refers to the depth of the third mounting hole 15 and the fourth mounting hole 16).

[0074] like Figure 2 to Figure 4 , Fig.15 As shown, the mold also includes a sealing plate 10 disposed between the second support plates 9 on both sides, located on both sides of the workpiece 1, and fitted with the two sides of the workpiece 1 after the mold is fixed on the area to be reinforced of the workpiece 1, a first support member 18 disposed between the second support plate 9 and the sealing plate 10, connected to the second support plate 9 and the sealing plate 10 respectively, and a second support member 19 disposed on the first support plate and connected to the second support plate 9. The first support member 18 and the second support member 19 can specifically be a triangular support block, a wedge-shaped support block or the like that can support the second support plate 9 or the sealing plate 10; the first support member 18 and the second support member 19 improve the strength of the mold, so that the mold meets the load-bearing design requirements of the reinforcement structure molding in the present invention, so that the mold can support the ultra-high performance concrete 2 by its own bearing capacity, thereby improving the flexibility of pouring the ultra-high performance concrete 2, and the mold can be reused, thereby reducing the cost of reinforcing the workpiece 1 in the present invention, and the mold in the present invention is not limited to being installed on a building.

[0075] The second support plate 9 is provided with a height limiting plate 12 at both ends. The length of the height limiting plate 12 is not less than the distance between the second support plates 9 on both sides to prevent the poured ultra-high performance concrete 2 from overflowing. Figure 4 As shown, the ultra-high performance concrete 20 is separated between the second support plate 9 and the sealing plate 10. The first support plate, the sealing plate 10 and the height limiting plate 12 together form a molding groove for pouring the ultra-high performance concrete 2. The lowest plate among the sealing plate 10, the first support plate and the height limiting plate 12 limits the molding height of the ultra-high performance concrete 2 and restricts the overflow of the ultra-high performance concrete 2. The height of the height limiting plate 12 is higher than the required molding height of the ultra-high performance concrete 2 to isolate the excess ultra-high performance concrete 2 in the molding groove.

[0076] The molds mentioned above can be made of wood materials, that is, wooden molds are selected. Compared with other types of molds such as steel molds, wooden materials are easy to obtain and process, and their mold making is simpler and the materials are more economical. Alternatively, if the working conditions require, wooden molds can be abandoned and replaced with other types of molds.

[0077] The following text uses specific numerical values ​​to illustrate the matching relationship between the various components in the reinforcement structure, as well as the matching relationship between the reinforcement structure and the area to be reinforced of the workpiece 1. When the UHCP height is 50mm, the height of the mold in the direction from the ultra-high performance concrete 2 to the workpiece 1 needs to be 20-40mm greater than the height of the ultra-high performance concrete 2. At this time, the first reinforcement component 3 can be a reinforcement member such as a steel plate. When the length of the first reinforcement component 3 is 250mm, the width is 110mm, and the height is 10mm, the length of the ultra-high performance concrete 2 along the first direction is 3200mm, the width of the ultra-high performance concrete 2 is equal to the cross-sectional width of the workpiece 1, the bottom width of the forming groove is 266mm, the angle between the second support plate 9 and the first support plate can be 60°-70°, the support rib 11 is 250mm long, 40mm high, and 100mm wide; the distance between the first mounting hole 13 and the side of the workpiece 1 close to the ultra-high performance concrete 2, that is, the depth of the first mounting hole 13 is 50mm, the distance between adjacent first mounting holes 13 in the first direction is 500mm, and the distance between adjacent first mounting holes 13 in the second direction is 500mm. The distance between adjacent first mounting holes 13 in the direction is 150mm, the distance between the second mounting hole 14 and the short side of the first reinforcement component 3 is 50mm, the distance between the second mounting hole 14 and the long side of the first reinforcement component 3 is 75mm, the distance between the third mounting hole 15 and the long side of the forming groove is 60mm, in the second direction, the distance between adjacent third mounting holes 15 is 150mm, in the first direction, the distance between adjacent third mounting holes 15 is 500mm, the distance between the fourth mounting hole 16 and the short side of the reinforcement rib is 50mm, and the distance between the fourth mounting hole 16 and the long side of the reinforcement rib is 75mm; the second mounting hole 14, the third mounting hole 15 and the fourth mounting hole 16 are circular holes of the same type and arranged at different positions, the diameter of the first mounting hole 13 can be 20mm, and the diameters of the second mounting hole 14, the third mounting hole 15 and the fourth mounting hole 16 are 16mm. When the first reinforcement 5 is a rectangular hoop and the second reinforcement 6 is a dish-shaped hoop, the distance between adjacent dish-shaped hoops is 167 mm, the short side of the dish-shaped hoop is located at the three-point position of the two adjacent first reinforcement components 3, the distance between the dish-shaped hoop and the adjacent sides of the rectangular hoop is 293 mm, the center of the rectangular hoop is aligned with the center of the first reinforcement component 3 at the corresponding position of the rectangular hoop, and the distance between the long side of the rectangular hoop and the adjacent second reinforcement component 4 is equal.

[0078] The second reinforcement component 4 is mainly subjected to bending in the overall structure. In order to prevent the second reinforcement component 4 from having an out-of-plane displacement during the force-bearing process, thereby causing the second reinforcement component 4 to yield prematurely and quit working, a first reinforcement member 5 and a second reinforcement member 6 are provided on the second reinforcement component 4. The dish-shaped hoop can be formed by bending a steel bar to form a rectangular shape in the middle, such as Fig.13 As shown, the hoop of this structure limits the displacement of the second reinforcing component 4 out of the plane and has a simple structure, that is, the structure meets the design requirements of the present invention.

[0079] It should be noted that the specific parameters of the first mounting hole 13, the second mounting hole 14 and other structures are only a specific embodiment of the reinforcement structure reinforcing the workpiece 1 in the present invention, and are not limited to the above parameters. The parameters of the above structure can be adjusted accordingly according to actual working conditions.

[0080] When the mold needs to be installed in the reinforcement area of ​​the workpiece 1, align the first mounting hole 13 with the center of the fifth reinforcement unit, align the second mounting hole 14 and the fifth reinforcement unit with the center of the second fastener 17, and align the fifth reinforcement unit, the third mounting hole 15 and the fourth mounting hole 16 with the center of the second fastener 17.

[0081] Before using the reinforcement structure of the present invention to reinforce the area to be reinforced of the workpiece 1, it should be ensured that the reinforcement structure and the mold are intact or the parts are loose. After ensuring that they are normal, subsequent operations can be performed. The present invention discloses a step of using the reinforcement structure above to reinforce the area to be reinforced of the workpiece 1: prepare the first reinforcement component 3, the second reinforcement component 4, the fifth reinforcement unit, the first support plate, the sealing plate 10, the support rib 11, the height limit plate 12 and other components in the reinforcement structure except the ultra-high performance concrete 2 in the production area such as the factory. Subsequently, a plurality of first mounting holes 13 are opened in the area to be reinforced of the workpiece 1. The buried depth of the first mounting hole 13 must meet the strength requirements of connecting the mold and the ultra-high performance concrete 2 to the workpiece 1. When the fifth reinforcement unit is a bolt, the buried depth of the first mounting hole 13 is the distance between the end of the bolt close to the workpiece 1 and the bottom of the bolt's key anchor bolt. The length of the fifth reinforcement unit extending out of the workpiece 1 is the sum of the height of the ultra-high performance concrete 2 and the height of the mold.

[0082] Then connect the first reinforcement component 3 and the fifth reinforcement unit, and fix them by the second fastener 17 (fix the second fastener 17 on the side of the fifth reinforcement unit away from the workpiece 1), set the first reinforcement component 3 at 34mm away from the area to be reinforced of the workpiece 1, and keep each first reinforcement component 3 in the same horizontal plane. After installing the first reinforcement component 3, overlap the second reinforcement component 4 on both sides of the first reinforcement component 3, close to the fifth reinforcement unit. When the second reinforcement component 4 is a steel bar, the first reinforcement member 5 is a rectangular hoop, and the second reinforcement member 6 is a dish-shaped hoop, the second reinforcement component 4 can be prepared into a rectangular hoop according to the size of the second reinforcement component 4 on site, and the rectangular hoop is tied or welded at both ends of the second reinforcement component 4, and a dish-shaped hoop is prepared around the fifth reinforcement unit between the two ends of the second reinforcement component 4, and the dish-shaped hoop is tied or welded to the second reinforcement component 4. After the above operation is completed, the first support plate is connected to the fifth reinforcement unit, and a support rib 11 is set at the bottom of the first support plate, and the support rib 11 is fixed to the bottom of the first support plate by the first fastener 8. Subsequently, sealing plates 10 are installed on both sides of the first support plate, and ultra-high performance concrete 2 is poured into the mold on both sides. The height limiting plates 12 are inserted on both sides of the mold, and the first support member 18 and the second support member 19 are used to support the first support plate and the second support plate 9, and the ultra-high performance concrete 2 is demolded after being formed. After demolding, the area of ​​the fifth reinforcement unit outside the ultra-high performance concrete 2 is cut off, and the reinforcement of the workpiece 1 can be completed, and the workpiece 1 and the reinforcement structure together form an integral structure.

[0083] It should be noted here that the second reinforcement unit 7 is a part of the fifth reinforcement unit. After demoulding and cutting off the area of ​​the fifth reinforcement unit outside the ultra-high performance concrete 2, the fifth reinforcement unit becomes the second reinforcement unit 7. The first fastener 8 and the second fastener 17 can be nuts that match the second reinforcement unit 7, or other structures that can limit and prevent loosening. The side of the second fastener 17 away from the workpiece 1 is flush with the side of the ultra-high performance concrete 2 away from the workpiece 1. The first reinforcement assembly 3 and the second reinforcement unit 7 act as a bracket, which reduces the difficulty of operating the ultra-high performance concrete 2 during the post-pouring process.

[0084] When the workpiece 1 is an existing concrete beam or other concrete component, it is also necessary to perform interface treatments such as roughening, sandblasting, and wetting the interface in the area to be reinforced of the workpiece 1. A micro-expansion agent can also be added to the ultra-high performance concrete 2 to allow the ultra-high performance concrete 2 to expand moderately during the hardening process, thereby increasing the interface compression force and improving the bonding strength. Alternatively, steel fiber or polypropylene fiber can be added to the ultra-high performance concrete 2 to enhance the crack resistance and interface bite effect and improve the connection effect. The above-mentioned interface treatment, as well as the materials such as modifiers added before the ultra-high performance concrete 2 is poured, are all prior art and will not be repeated here.

[0085] The ultra-high performance concrete 2 in the present invention provides repair for existing damaged concrete beams and improves the bearing capacity of the overall structure. The ultra-high performance concrete 2 uses the performance of its own materials to improve the strength and ensure the stability of the structure. The second reinforcement unit 7 cooperates with the first reinforcement component 3 to provide shear resistance and facilitate the molding of the ultra-high performance concrete 2. The mold has strong plasticity and simple structure, and can meet the bearing capacity during pouring with the support ribs 11. The reinforcement structure and mold structure in the present invention are simple and reliable, have outstanding economic benefits, excellent earthquake resistance, and are easy to repair after earthquakes.

[0086] It should also be noted that if Figure 1 As shown, the present invention adds ultra-high performance concrete 2 to the area to be reinforced of the workpiece 1, such as the bottom of the existing concrete beam. Since the ultra-high performance concrete 2 itself has the characteristics of high strength and high bending strength, the workpiece 1 can restore its function (the function can be understood as the strength, bearing capacity and other conditions that the workpiece 1 must meet as a load-bearing component) and continue to serve without demolition and reconstruction. Ultra-high performance concrete 2 is a high-strength, high-toughness, and high-durability fiber cement-based composite material that is widely used in the field of prevention engineering. It is used in this structure to effectively improve the strength of the reinforced section. It has the characteristics of reasonable force, simple structure, and good seismic performance.

[0087] Furthermore, the ultra-high performance concrete 2 in the present invention improves the rigidity and ductility of the overall structure. The ultra-high performance concrete 2 has ultra-high compressive strength, which enables the overall structure to withstand greater loads and shear forces, significantly improving the bearing capacity and overall stability of the workpiece 1 after being reinforced by the reinforcement structure in the present invention, and can absorb a large amount of energy during the force-bearing process, showing good ductility and toughness, which enables existing workpieces 1 such as concrete beams to provide stronger anti-collapse ability and deformation coordination ability under earthquake action, and meet the design requirements of the reinforcement method of the workpiece 1; the workpiece 1 and the ultra-high performance concrete 2 are connected by a second reinforcement unit 7, which plays a role in resisting shear force and forms a whole with the second reinforcement component 4, so that the ultra-high performance concrete 2 can be quickly formed.

[0088] It should be noted that, depending on factors such as the quality, structure, geological conditions of the area where the workpiece 1 is located and the requirements for shock absorption effects, different settings of the first reinforcement unit, the second reinforcement unit 7, the third reinforcement unit and the fourth reinforcement unit mentioned above can be selected accordingly to reinforce the area to be reinforced of the workpiece 1 such as a concrete beam, repair the workpiece 1 or improve the bearing capacity and seismic resistance of the workpiece 1.

[0089] In the present invention, and / or refers to the text content before and / or and the text content after and / or in the same sentence, which can exist at the same time or separately. For example, A and / or B includes the three situations of only A or B and A and B at the same time. And / or has the same meaning as and / or, which will not be repeated here.

[0090] The present invention discloses multiple technical solutions, but does not provide any contrary technical inspiration.

[0091] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A UHPC-based reinforcement structure, characterized in that: The reinforcement structure comprises: Ultra-high performance concrete, which is used for post-casting in the area to be reinforced of the workpiece; a first reinforcement unit, wherein the first reinforcement unit is located in the ultra-high performance concrete; A second reinforcement unit, wherein a first end of the second reinforcement unit extends into the ultra-high performance concrete, a second end of the second reinforcement unit extends into the workpiece, and the first reinforcement unit and the second reinforcement unit are in contact with each other.

2. The reinforcement structure according to claim 1, characterized in that: The first reinforcement unit includes a first reinforcement component, a second reinforcement component and a third reinforcement component. The first reinforcement component, the second reinforcement component and the third reinforcement component are all abutted against the second reinforcement unit; the first reinforcement component and the third reinforcement component are arranged along the first direction of the ultra-high performance concrete, and the second reinforcement component is arranged along the second direction of the ultra-high performance concrete; at least two of the first reinforcement component, the third reinforcement component and the second reinforcement component are in contact.

3. The reinforcement structure according to claim 2, characterized in that: The first direction is perpendicular to the second direction; And / or, the first direction and the second direction are both perpendicular to the direction in which the second reinforcement unit extends into the workpiece.

4. The reinforcement structure according to claim 2, characterized in that: The first reinforcing component is provided on a side of the second reinforcing component close to or far from the workpiece, and the third reinforcing component is provided on a side of the second reinforcing component opposite to the first reinforcing component; Alternatively, the third reinforcement component is sleeved on the outside of the second reinforcement component.

5. The reinforcement structure according to any one of claims 2 to 4, characterized in that: The third reinforcing component includes a first reinforcing member disposed at both ends of the second reinforcing component, and a second reinforcing member disposed between both ends of the second reinforcing component, the first reinforcing member includes a rectangular hoop, and the second reinforcing member includes a dish-shaped hoop.

6. The reinforcement structure according to claim 1, characterized in that: A bonding layer is provided between the ultra-high performance concrete and the workpiece; And / or, the first reinforcement unit further includes a fourth reinforcement component, and the fourth reinforcement component is arranged along the third direction of the ultra-high performance concrete; And / or, the first end of the second reinforcement unit is located in the ultra-high performance concrete; wherein the second end of the second reinforcement unit extends out of the workpiece, the second end of the second reinforcement unit is provided with a fastener, or the second end of the second reinforcement unit is located in the workpiece; And / or, the first reinforcement unit and / or the second reinforcement unit are connected to an existing reinforcement member in the workpiece; And / or, a third reinforcement unit is provided on a side of the ultra-high performance concrete away from the workpiece and / or close to the workpiece, and the reinforcement structure also includes a connecting member, which applies a first force to the third reinforcement unit and the ultra-high performance concrete, and the first force connects the third reinforcement unit and the ultra-high performance concrete together.

7. The reinforcement structure according to claim 1, characterized in that: The first reinforcement unit and the second reinforcement unit are fixedly connected; and / or, the contact area between the first reinforcement unit and the second reinforcement unit includes a toothed surface or a groove; and / or, the contact area between the second reinforcement unit and the ultra-high performance concrete and the workpiece is provided with a flexible connector; and / or, the contact area between the first reinforcement unit and the second reinforcement unit is provided with a damping layer.

8. The reinforcement structure according to claim 5, characterized in that: The first reinforcement and the second reinforcement are arranged at intervals along the first direction, and the distribution density of the first reinforcement gradually decreases from the direction away from the end of the second reinforcement component toward the direction close to the end of the second reinforcement component, and the distribution density of the second reinforcement gradually increases from the direction close to the end of the second reinforcement component toward the direction away from the end of the second reinforcement component.

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