Reusable precast concrete slab connecting structure and mounting method therefor

Abstract

A reusable precast concrete slab connecting structure and a mounting method therefor, relating to the technical field of prefabricated buildings. The connecting structure comprises precast concrete slabs and a second connecting assembly. Each precast concrete slab comprises concrete, steel bars located in the concrete, and a first connecting member exposed out of the concrete, the first connecting member has a first side face and a second side face which are oppositely arranged, the first side face of the first connecting member is connected to the steel bars, and second side faces of first connecting members of adjacent precast concrete slabs are in direct abutment. The second connecting assembly is configured to connect and fix adjacent first connecting members, and the second connecting assembly is detachably connected to the first connecting members. The precast concrete slab connecting structure provided in the present invention solves the problem that the integrally assembled precast floor cannot be disassembled, facilitating repeated utilization of resources. Moreover, the second connecting assembly is configured to connect and fix the first connecting members, reducing the risk of local crushing of concrete at a connecting position, thereby prolonging the service life of the precast concrete slabs.

Description

A reusable precast concrete panel connection structure and installation method thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 6, 2024, with application number 202410254192.2 and invention name “A reusable precast concrete panel connection structure and its installation method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of prefabricated buildings, and more particularly to a reusable precast concrete panel connection structure and an installation method thereof. Background Art

[0003] Prefabricated buildings shift much of the on-site work involved in traditional construction methods to factories. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are processed and manufactured in factories, transported to the construction site, and assembled and installed on-site using reliable connections. Prefabricated buildings not only control production schedules but also allow for normal construction even in inclement weather, thereby improving production efficiency. Prefabricated buildings also offer high precision, effectively controlling construction errors to within millimeters during the construction process. All components required for construction are factory-produced, improving the quality of prefabricated buildings and leading to their widespread use in both civil and public buildings.

[0004] Precast concrete components (PC components) are the basic components for realizing prefabricated main structures in prefabricated buildings. Among them, precast concrete components include precast concrete floor slabs, precast concrete wall panels, precast concrete columns and precast concrete beams. Precast concrete floor slabs are not only used to support walls and columns in the horizontal direction to ensure the stability of walls and columns, but also can withstand loads transmitted in the horizontal direction, such as wind loads and seismic loads, and transfer these loads to walls and columns, and then from walls and columns to the foundation. Under the action of horizontal earthquakes or wind loads, precast concrete floor slabs are subjected to in-plane bending moments, so that the connectors between adjacent precast concrete floor slabs need to transmit shear and tension at the same time. According to the force characteristics, shear connectors are arranged along the length of the floor slab, and tensile connectors are arranged at the ends of the slabs.

[0005] In the prior art, for traditional prefabricated buildings, there are generally two construction methods for floor systems. One construction method is to use a composite floor slab that combines prefabrication and cast-in-place, that is, an assembled integral floor slab. The assembled integral floor slab ensures the integrity and in-plane rigidity of the assembled integral floor slab by casting a certain thickness of concrete surface layer on the composite floor slab. The assembled integral floor slab is constructed using a wet operation floor slab method, which cannot achieve the purpose of disassembling the assembled integral floor slab after reaching the design cycle or when the assembled integral floor slab is maintained, and is not conducive to the reuse of resources, hindering sustainable development. Another construction method is to drill holes in adjacent precast concrete slabs and connect them with bolts or other components, but the errors that will inevitably occur in the prefabrication production and installation process of the precast concrete slabs will directly affect the centering of the holes, making the installation of adjacent precast concrete slabs more inconvenient. At the same time, when tension is generated between adjacent precast concrete slabs, the bolts or other components directly act on the concrete of the precast concrete slabs, making it easy for the concrete near the bolt holes to be locally broken under the action of tension, which has a great impact on the service life of the prefabricated building.

[0006] Furthermore, larger bolt holes are necessary to accommodate manufacturing and construction errors, which inevitably lead to slippage between the concrete and steel connection components. Furthermore, corrosion of high-strength bolts and localized deformation of the bolt shanks can make disassembly more difficult.

[0007] Therefore, how to facilitate the disassembly of precast concrete panels while reducing the risk of concrete cracking at the connection positions of the precast concrete panels has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0008] In view of this, an object of the present invention is to provide a reusable precast concrete panel connection structure, so as to facilitate the disassembly of the precast concrete panels and reduce the risk of concrete cracking at the connection positions of the precast concrete panels.

[0009] Another object of the present invention is to provide a method for installing precast concrete panels using the above-mentioned reusable precast concrete panel connection structure.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A reusable precast concrete panel connection structure, comprising:

[0012] A precast concrete panel, the precast concrete panel comprising concrete, steel bars within the concrete, and a first connector exposed from the concrete, the first connector having a first side surface and a second side surface disposed opposite each other, the first side surface of the first connector being connected to the steel bars and being in close contact with the second side surface of the first connector of the adjacent precast concrete panel;

[0013] The second connecting component is used to connect and fix the adjacent first connecting members, and the second connecting component and the first connecting member are detachably connected.

[0014] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the second connection assembly includes second connection members respectively provided at both ends of the first connection member, and the two second connection members respectively connect and fix the two ends of the first connection members of adjacent precast concrete panels.

[0015] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the second connecting member includes a fixing block for abutting the first side surface of the first connecting member and a fastener cooperating with the fixing block, and there are two fixing blocks, and the two fixing blocks respectively abut the first side surfaces of two closely attached first connecting members, and the two fixing blocks clamp the first connecting members of adjacent precast concrete panels through the fastener.

[0016] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the second side surface of the first connecting member is on the same plane as the connection end surface of the precast concrete panel, and an installation groove for installing the fixing block is provided at the connection position adjacent to the precast concrete panel, so that the fixing block and the fastener are located in the installation groove, and the installation groove is filled with protective material.

[0017] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the precast concrete panel has a first surface and a second surface arranged opposite to each other, the first surface and the second surface are both perpendicular to the first side surface of the first connecting member, and the first surface and the second surface of the precast concrete panel respectively extend toward the inner side of the precast concrete panel to form the installation groove.

[0018] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the fastener includes a bolt and a bolt hole provided on the fixing block and cooperating with the bolt, and the first connecting member is provided with an opening for avoiding the bolt so that the bolt passes through the opening of the first connecting member and is connected to the fixing block, and the length of the fixing block is greater than the width of the opening so that the fixing block abuts against the first side surface of the first connecting member.

[0019] Optionally, in the above-mentioned reusable precast concrete panel connection structure, a first positioning portion for positioning the fixing block is provided on the first side surface of the first connecting member, and a second positioning portion cooperating with the first positioning portion is provided on the fixing block, and the first positioning portion and the second positioning portion cooperate to locate the installation position of the fixing block.

[0020] Optionally, in the above-mentioned reusable precast concrete panel connection structure, the first positioning portion includes two bosses provided on the first side surface, the two bosses are respectively located on both sides of the opening of the first connecting member, and the upper surfaces of the two bosses are located on the same plane, and the second positioning portion is the bottom surface of the fixing block, and the upper surface of the boss contacts the bottom surface of the fixing block, so that the two bosses respectively support the two ends of the fixing block; or,

[0021] The first positioning portion includes two protrusions arranged on the first side surface, the two protrusions are respectively located on both sides of the opening of the first connecting member, and the upper surfaces of the two protrusions are located on the same plane. The second positioning portion includes two grooves arranged on the fixing block, and the grooves on the fixing block are arranged corresponding to the protrusions of the first connecting member so that the protrusions of the first connecting member are inserted into the grooves of the fixing block.

[0022] Optionally, in the above-mentioned reusable precast concrete slab connection structure, the first connecting member and the steel bar are an integrated structure; or, the first connecting member and the steel bar are connected and fixed by welding.

[0023] A method for installing a precast concrete panel, the method using the reusable precast concrete panel connection structure as described in any one of the above items, comprising the steps of:

[0024] Installing a first connecting member, and fixing a first side surface of the first connecting member to an end portion of a steel bar of the precast concrete slab by welding to form a steel bar skeleton;

[0025] pouring concrete, placing the steel bar skeleton in a casting template, with the second side surface of the first connecting member in close contact with the inner wall of the casting template, and pouring concrete into the casting template using a pouring device to form the precast concrete slab, wherein the precast concrete slab has a mounting groove reserved for mounting the second connecting component;

[0026] Installing a precast concrete slab, supporting both ends of the precast concrete slab on a load-bearing member, closely contacting the second side of the first connecting member of the adjacent precast concrete slab, and connecting and fixing the first connecting member via the second connecting assembly;

[0027] Filling protective materials, using epoxy resin or asphalt mortar to fill the installation grooves at the joints of adjacent precast concrete panels.

[0028] The reusable precast concrete slab connection structure provided by the present invention connects the first side of a first connector to the steel bars within the precast concrete slab, so that the first connector and the steel bars together form a steel skeleton of the precast concrete slab to withstand tensile loads transmitted in a direction parallel to the steel bars. Concrete is poured on the outside of the steel skeleton, which protects the steel skeleton while mainly bearing compressive loads transmitted in a direction perpendicular to the precast concrete slab. When adjacent precast concrete slabs are connected, the connection of the adjacent precast concrete slabs is completed by pressing the second side of the first connector of the adjacent precast concrete slabs tightly together. At this time, the portion of the first connector exposed to the outside of the concrete is connected and fixed by a second connecting assembly. When the precast concrete slabs need to be disassembled, since the second connecting assembly and the first connector are detachably connected, the adjacent precast concrete slabs can be separated by simply removing the second connecting assembly, and the precast concrete slabs can then be disassembled.

[0029] Compared to the prior art, the reusable precast concrete slab connection structure provided by the present invention solves the problem of prefabricated monolithic floor slabs being unable to be disassembled after reaching their design lifecycle or for maintenance, through the detachable connection between the second connecting component and the first connecting member. This facilitates the reuse of resources and promotes sustainable development. Furthermore, the first connecting member is connected to the rebar within the precast concrete slab, forming a steel skeleton for the precast concrete slab. This allows the rebar and the first connecting member to jointly bear tensile loads transmitted parallel to the rebar. Furthermore, the second connecting member connects and secures the first connecting members of adjacent precast concrete slabs, rather than directly acting on the concrete. This reduces the risk of localized concrete breakage at the connection point when tension is generated between adjacent precast concrete slabs, thereby increasing the service life of the precast concrete slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0031] FIG1 is a perspective view of an assembly of a connection structure provided by an embodiment of the present invention;

[0032] FIG2 is a schematic structural diagram of the connection structure assembly provided by an embodiment of the present invention;

[0033] FIG3 is a schematic structural diagram of a connection structure and stressed steel bars provided in an embodiment of the present invention;

[0034] FIG4 is a schematic structural diagram of a first connecting member and a stressed steel bar provided in an embodiment of the present invention;

[0035] FIG5 is an isometric view of a first connecting member provided in Example 1 of the present invention;

[0036] FIG6 is a front view of a first connecting member provided in Example 1 of the present invention;

[0037] FIG7 is a front view of a first connecting member provided in Embodiment 2 of the present invention;

[0038] FIG8 is an isometric view of a second connecting member provided in Example 1 of the present invention;

[0039] FIG9 is a front view of a second connecting member provided in Example 1 of the present invention;

[0040] FIG10 is a front view of a second connecting member provided in the second embodiment of the present invention;

[0041] FIG11 is a schematic diagram of the assembly of the first connecting member and the concrete formwork provided by an embodiment of the present invention;

[0042] FIG12 is a schematic diagram of a finite element model of a connection structure provided by an embodiment of the present invention;

[0043] FIG13 is a schematic diagram of equivalent plastic strain of a connection structure provided by an embodiment of the present invention;

[0044] FIG14 is a flow chart of a precast concrete panel installation method according to an embodiment of the present invention.

[0045] Among them, 100 is a precast concrete slab, 101 is concrete, 102 is a steel bar, 103 is a first connecting member, 1031 is a first side surface, 1032 is a second side surface, 1033 is an opening, 1034 is a first positioning portion, 1035 is a boss, 1036 is a protrusion, 104 is a connecting end face, 105 is a mounting groove, 106 is a first surface, and 107 is a second surface; 200 is a second connecting member, 201 is a fixing block, 2011 is a second positioning portion, 2012 is a groove, 202 is a fastener, 2021 is a bolt, and 2022 is a bolt hole; 300 is a casting template. DETAILED DESCRIPTION

[0046] The core of the present invention is to provide a reusable precast concrete panel connection structure, so as to facilitate the disassembly of the precast concrete panels and reduce the risk of concrete cracking at the connection positions of the precast concrete panels.

[0047] Another core of the present invention is to provide a precast concrete panel installation method using the above-mentioned reusable precast concrete panel connection structure.

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] As shown in FIG. 1 and FIG. 2 , an embodiment of the present invention discloses a reusable precast concrete panel connection structure, including a precast concrete panel 100 and a second connection assembly.

[0050] Existing wet-work methods for constructing prefabricated monolithic floors prevent them from being disassembled after their design lifecycle or for maintenance. This hinders resource reuse and sustainable development. While drilling holes in adjacent precast concrete slabs and connecting them with bolts or other components can address the issue of monolithic floors being unable to be disassembled, the inevitable errors that occur during the prefabrication and installation of precast concrete slabs directly affect the alignment of the holes, making the installation of adjacent precast concrete slabs more difficult.

[0051] At the same time, it is well known to those skilled in the art that the tensile strength of concrete is 1 / 10 to 1 / 20 of its compressive strength. Among them, tensile strength is the resistance to the maximum uniform plastic deformation of a material. Before concrete is subjected to the maximum tensile stress, its deformation is uniform and consistent. Since concrete is a brittle material, it has a smaller ability to undergo uniform plastic deformation. When the maximum tensile stress is exceeded, concrete is prone to fracture and local cracking. Tensile strength reflects the concrete's resistance to fracture, while compressive strength reflects the concrete's ability to resist pressure acting vertically on concrete components. The greater the tensile strength of concrete, the greater its resistance to fracture, the stronger its ability to resist tensile loads, and the less likely the concrete is to crack. The greater the compressive strength of concrete, the stronger its compressive resistance, and the stronger its ability to resist pressure acting vertically on concrete components. And because the tensile strength of concrete is much smaller than its compressive strength, concrete mainly bears pressure acting vertically on concrete.

[0052] When tension is generated between adjacent precast concrete panels, bolts and other components directly act on the concrete of the panels, and concrete has low tensile strength. This causes the concrete at the bolt holes to come into direct contact with the bolts under tension. Excessive localized pressure can crush the concrete, significantly impacting the service life of prefabricated buildings. Furthermore, larger bolt holes are necessary to accommodate manufacturing and construction errors, which inevitably lead to slippage between the concrete and steel connection components. Furthermore, corrosion of high-strength bolts and localized deformation of the bolt shanks can complicate disassembly.

[0053] In order to solve the problem of difficulty in disassembling precast concrete panels and reduce the risk of concrete cracking at the connection positions of precast concrete panels, the reusable precast concrete panel connection structure disclosed in the embodiment of the present invention solves the problem that the assembled integral floor panels cannot be disassembled after the design period is reached or when the assembled integral floor panels are maintained through the detachable connection between the second connection component and the first connection member 103. The detachable connection structure between adjacent precast concrete panels 100 can realize the reuse of the precast concrete panels 100, and when the connection structure between adjacent precast concrete panels 100 is damaged, it is convenient to replace the connection structure between adjacent precast concrete panels 100, thereby increasing the service life of the precast concrete panels 100, facilitating the reuse of resources, and promoting the trend of sustainable development. At the same time, the first connecting member 103 is connected to the steel bars 102 in the precast concrete panel 100 to form a steel bar skeleton of the precast concrete panel 100, so that the steel bars 102 and the first connecting member 103 jointly bear the tensile load transmitted in a direction parallel to the steel bars 102, and the second connecting assembly connects and fixes the first connecting members 103 of adjacent precast concrete panels 100 instead of directly acting on the concrete 101, thereby reducing the risk of local crushing of the concrete 101 at the connection position when tension is generated between adjacent precast concrete panels 100, thereby improving the service life of the precast concrete panel 100.

[0054] It should be noted that the reusable precast concrete slab connection structure disclosed in the embodiment of the present invention can be used not only for connecting adjacent precast concrete floor slabs, but also for connecting adjacent precast concrete wall panels.

[0055] Specifically, as shown in Figures 1 and 2, the precast concrete panel 100 includes concrete 101, steel bars 102 located within the concrete 101, and a first connector 103 exposed from the concrete 101. As shown in Figure 5, the first connector 103 is a rectangular steel plate having a certain thickness. For ease of understanding, the two oppositely disposed sides of the first connector 103 are defined as a first side 1031 and a second side 1032, respectively. As shown in Figures 3 and 4, the first side 1031 of the first connector 103 is connected to the end of the steel bars 102, and the second side 1032 of the first connectors 103 of adjacent precast concrete panels 100 are closely attached, while ensuring that the four sides of the first connectors 103 of adjacent precast concrete panels 100 are aligned to avoid misalignment of the connections of adjacent precast concrete panels 100.

[0056] In a specific embodiment, the first side surface 1031 of the first connecting member 103 and the steel bar 102 are cast to form a steel bar skeleton of an integrated structure, so that the overall stability of the steel bar skeleton is good and the overall strength is high. The connection strength at the connection position between the first side surface 1031 of the first connecting member 103 and the steel bar 102 is high and not prone to breakage. However, the manufacturing process is relatively complex, the production efficiency is low, and the production cost is high. In this embodiment, the first side surface 1031 of the first connecting member 103 and the end of the steel bar 102 are connected and fixed by welding to form a steel bar skeleton of a split structure, so that the production process of the steel bar skeleton is relatively simple. The first connecting member 103 and the steel bar 102 can be produced separately and then connected and fixed by welding or bolting (threaded connection). The manufacturing process is relatively simple, the production efficiency is high, and the production cost is low.

[0057] At the same time, in order to ensure the connection strength between the first side surface 1031 of the first connector 103 and the end of the steel bar 102, a triangular stiffening rib plate can be set at the connection position between the first side surface 1031 of the first connector 103 and the end of each steel bar 102 to improve the connection strength between the first side surface 1031 of the first connector 103 and the steel bar 102. Specifically, the triangular stiffening rib plate has two connection sides that are perpendicular to each other. For ease of understanding, the two connection sides of the triangular stiffening rib plate that are perpendicular to each other are defined as the first connection side and the second connection side, respectively. Among them, the first connection side of the triangular stiffening rib plate is welded and fixed to the first side surface 1031 of the first connector 103, and the second connection side of the triangular stiffening rib plate is welded and fixed to the steel bar 102 to improve the reliability of the connection between the first side surface 1031 of the first connector 103 and the steel bar 102.

[0058] Of course, the connection strength between the first side surface 1031 of the first connector 103 and the end of the rebar 102 can also be improved by increasing the welding area between the first side surface 1031 of the first connector 103 and the end of the rebar 102. Specifically, a connecting flange is provided between the first side surface 1031 of the first connector 103 and the end of the rebar 102, and the connecting flange includes a connecting plate and a connecting sleeve provided on the connecting plate. The inner wall of the connecting sleeve is provided with an internal thread, and the end of the rebar 102 is machined to form an external thread that mates with the internal thread of the connecting sleeve. The connecting sleeve of the connecting flange is fixedly connected to the end of the rebar 102 through a threaded mating connection. At the same time, the connecting plate of the connecting flange is welded to the first side surface 1031 of the first connecting member 103. Because the outer diameter of the connecting plate is larger than the outer diameter of the steel bar 102, the steel bar 102 is welded to the first side surface 1031 of the first connecting member 103 through the connecting plate of the connecting flange. This increases the welding area between the first side surface 1031 of the first connecting member 103 and the end of the steel bar 102, thereby improving the connection strength between the first side surface 1031 of the first connecting member 103 and the end of the steel bar 102. In addition, the connecting sleeve of the connecting flange is connected and fixed to the end of the steel bar 102 through a threaded fit, which can reduce the use of solder, thereby improving the connection strength between the first side surface 1031 of the first connecting member 103 and the end of the steel bar 102 and reducing welding costs.

[0059] Furthermore, when the precast concrete panels 100 are processed at the factory and transported to the site for installation, the two ends of the precast concrete panels 100 are first supported on load-bearing members, and the second side surfaces 1032 of the first connectors 103 of adjacent precast concrete panels 100 are ensured to be closely aligned. At this time, the first connectors 103 of the adjacent precast concrete panels 100 are connected and fixed by the second connecting assembly to ensure a reliable connection between the adjacent precast concrete panels 100. Because the second connecting assembly connects and fixes the first connectors 103 of the adjacent precast concrete panels 100 rather than directly acting on the concrete 101, the risk of localized crushing of the concrete 101 at the connection location when tension is generated between the adjacent precast concrete panels 100 is reduced, thereby increasing the service life of the precast concrete panels 100.

[0060] Furthermore, when the precast concrete panels 100 need to be disassembled, since the second connecting component and the first connecting member 103 are detachably connected, the adjacent precast concrete panels 100 can be separated by simply removing the second connecting component. At this time, the precast concrete panels 100 can be disassembled, thereby solving the problem that the assembled integral floor panels cannot be disassembled after the design cycle is reached or when the assembled integral floor panels are maintained, which is conducive to the reuse of resources and promotes the trend of sustainable development.

[0061] In one specific embodiment, when a precast concrete slab utilizes a precast concrete slab connection structure, the steel bars 102 within the precast concrete slab include longitudinal and transverse steel bars arranged perpendicular to each other, and the first side 1031 of the first connector 103 is connected to the end of the transverse steel bar. The longitudinal steel bars within the precast concrete slab are used to anchor the load-bearing components at both ends of the precast concrete slab. After the precast concrete slab is processed at the factory, it is transported to the construction site for installation. During installation, if the load-bearing components at both ends of the precast concrete slab are concrete beams, the ends of the precast concrete slab are first supported on the concrete beams and connected using a reliable connection method, such as anchoring. Specifically, the longitudinal steel bars on the precast concrete slab are welded to the steel bars on the concrete beams or inserted into anchors, so that the precast concrete slab and the concrete beams form a single unit. Of course, the connection method between the ends of the precast concrete slab and the concrete beams can also be steel plate connection or bolt connection, etc., which can be determined according to specific circumstances and needs to ensure the stability and safety of the building structure.

[0062] After both ends of the precast concrete floor slab are reliably connected to the concrete beam, the adjacent precast concrete floor slabs are fixed to the concrete beam in the same manner, and the second side surfaces 1032 of the first connecting members 103 of the adjacent precast concrete floor slabs are ensured to be tightly aligned. At this time, the first connecting members 103 of the adjacent precast concrete floor slabs are connected and fixed by the second connecting assembly to ensure a reliable connection between the adjacent precast concrete floor slabs. The tension generated by wind loads or earthquake loads at the connection positions of the adjacent precast concrete floor slabs is borne by the first connecting members 103 and the second connecting assembly, thereby reducing the risk of concrete breakage at the connection positions of the precast concrete floor slabs and improving the service life of the precast concrete floor slabs.

[0063] It should be noted that if the load-bearing components at both ends of the precast concrete slab are concrete walls, the connection method between the two ends of the precast concrete slab and the concrete wall can be a steel bar connection method. Specifically, the longitudinal steel bars of the precast concrete slab and the vertical steel bars of the concrete wall are embedded in each other to form a steel bar connection, thereby achieving the effect of fixing the precast concrete slab and the concrete wall. Of course, the connection between the precast concrete slab and the concrete wall can also be achieved by embedded parts connection, joint connection or adhesive connection, etc., which can be determined according to specific circumstances and needs to ensure the stability and safety of the building structure. After the precast concrete slab and the concrete wall are reliably connected, the connection method between adjacent precast concrete slabs has been explained and illustrated in the above embodiments and will not be repeated here.

[0064] In another specific embodiment, when the precast concrete wall panel adopts a precast concrete panel connection structure, the steel bars 102 in the precast concrete wall panel include vertical distribution bars and horizontal distribution bars arranged perpendicular to each other, and the first side surface 1031 of the first connecting member 103 is connected to the end of the horizontal distribution bar. The vertical distribution bars in the precast concrete wall panel are used to connect to the load-bearing components at both ends of the precast concrete wall panel. If the precast concrete wall panel is a load-bearing wall (shear wall), the vertical distribution reinforcement at both ends of the precast concrete wall panel can be connected and fixed with the vertical distribution reinforcement of the adjacent precast concrete wall panel arranged vertically through a sleeve. Specifically, the sleeve is fixed to the end of the vertical distribution reinforcement of the precast concrete wall panel by threading or welding. When connecting, the vertical distribution reinforcement of the adjacent precast concrete wall panel is inserted into the sleeve, and mortar or other bonding materials are poured into the sleeve to fix the two vertically adjacent precast concrete wall panels; if the precast concrete wall panel is a non-load-bearing wall (partition wall), the precast concrete wall panel and the load-bearing components (floor slabs or beams) at both ends of the precast concrete wall panel can be connected by bonding. Specifically, the precast concrete wall panel and the load-bearing components (floor slabs or beams) at both ends of the precast concrete wall panel are bonded and fixed with mortar or other bonding materials.

[0065] After both ends of the precast concrete wall panels are reliably connected to the load-bearing components, the adjacent precast concrete wall panels in the horizontal direction are fixed to the load-bearing components in the same manner, and the second side surfaces 1032 of the first connecting members 103 of the adjacent precast concrete wall panels are ensured to be tightly aligned. At this time, the first connecting members 103 of the adjacent precast concrete wall panels are connected and fixed by the second connecting assembly to ensure a reliable connection between the adjacent precast concrete wall panels, so that the tension generated by wind loads or earthquake loads at the connection positions of the adjacent precast concrete wall panels is borne by the first connecting members 103 and the second connecting assembly, thereby reducing the risk of concrete breakage at the connection positions of the precast concrete wall panels and improving the service life of the precast concrete wall panels.

[0066] When connecting adjacent precast concrete panels 100, if the connection between the adjacent precast concrete panels 100 is not firm, the adjacent precast concrete panels 100 are likely to separate and misalign after the precast concrete panels 100 are installed. At the same time, stress concentration will occur at the connecting components, reducing the service life of the connecting components and thus affecting the service life of the precast concrete panels 100.

[0067] To ensure the reliability of the connection between adjacent precast concrete panels 100 and prevent misalignment between adjacent precast concrete panels 100, as shown in FIG1 , the second connection assembly includes second connectors 200, respectively provided at both ends of the first connector 103. The two second connectors 200 respectively connect and secure the two ends of the first connectors 103 of adjacent precast concrete panels 100 to ensure the reliability of the connection between the adjacent precast concrete panels 100. Specifically, for ease of understanding, the second connector 200 at one end of the first connector 103 will be used as an example for explanation and description. As shown in FIG3 , the second connector 200 includes a fixing block 201 abutting against the first side surface 1031 of the first connector 103 and a fastener 202 cooperating with the fixing block 201. There are two fixing blocks 201, and the two fixing blocks 201 respectively abut against the first side surfaces 1031 of the two first connectors 103 that are closely attached. That is, the two fixing blocks 201 apply a clamping force to both sides of the two first connectors 103 that are closely attached, and the two fixing blocks 201 are locked and fixed by the fastener 202, so that the first connectors 103 of adjacent precast concrete panels 100 are clamped by the two fixing blocks 201.

[0068] In a specific embodiment, as shown in Figures 3 and 8, the fastener 202 includes a bolt 2021 and a bolt hole 2022 provided on the fixing block 201. The bolt 2021 cooperates with the bolt hole 2022 to achieve the purpose of locking and fixing the two fixing blocks 201 through the fastener 202. At the same time, as shown in Figures 5 to 7, in order to ensure that the bolt 2021 can pass through the first connecting member 103 to connect the two fixing blocks 201 abutting the first side surfaces 1031 of the two closely attached first connecting members 103, openings 1033 are provided at both ends of the first connecting member 103 to avoid the bolt 2021. This allows the bolt 2021 to pass through the openings 1033 on the first connecting member 103 and connect to the fixing blocks 201 abutting the first side surfaces 1031 of the first connecting member 103. Of course, to ensure that the fixing block 201 abuts the first side surface 1031 of the first connector 103, the width of the opening 1033 cannot be set too large. It is necessary to ensure that the length of the fixing block 201 is greater than the width of the opening 1033 so that both ends of the fixing block 201 can abut against the opening 1033 of the first connector 103 on both sides in the width direction. In this embodiment, to ensure the strength of the bolt 2021 and prevent it from being pulled off or sheared, the bolt 2021 is a high-strength bolt. At the same time, the fixing block 201 can be cut from a square steel pipe to reduce the deadweight of the fixing block 201. While improving the reliability and stability of the connection of the fixing block 201, it also reduces material costs. The production process is simple and can be produced on-site. After production is completed, it can also be transported to the site for installation, thereby improving the convenience and applicability of the precast concrete slab connection structure. In addition, as shown in Figures 8 and 9, the bolt hole 2022 is a through hole provided in the middle of the fixing block 201. When locking and fixing, the tail of the bolt 2021 is passed through the through holes on the two fixing blocks 201 in turn, so that the head of the bolt 2021 abuts against the fixing block 201, and after the washer is put on the tail of the bolt 2021, the nut is tightened and fixed, thereby achieving the purpose of locking and fixing the two fixing blocks 201 through the fastener 202.

[0069] When gaps form at the connection points between adjacent precast concrete panels 100, mortar or other caulking materials are often used to cover the gaps. However, when wind loads or earthquake loads act on the precast concrete panels 100, tensile forces are generated at the connection points between the adjacent precast concrete panels 100, causing the mortar or other caulking materials to fall off and become ineffective. This exposes the first connectors 103 at the connection points between the adjacent precast concrete panels 100, significantly impacting the aesthetics of the precast concrete panels 100 and the safety and reliability of the precast concrete panels 100.

[0070] In order to ensure that adjacent precast concrete panels 100 are completely aligned at the connection locations and to avoid gaps at the connection locations of adjacent precast concrete panels 100, as shown in FIG2 , the second side surface 1032 of the first connector 103 is coplanar with the connection end surface 104 of the precast concrete panel 100. Specifically, as shown in FIG4 and FIG11 , the first side surface 1031 of the first connector 103 is fixed to the end of the steel bar 102 of the precast concrete panel 100 to form a steel bar skeleton. The steel bar skeleton is then placed in the casting template 300, and the second side surface 1032 of the first connector 103 is in close contact with the inner wall of the casting template 300. This ensures that after the concrete 101 is poured into the casting template 300 by the casting equipment, the second side surface 1032 of the first connector 103 is coplanar with the connection end surface 104 of the precast concrete panel 100, thereby avoiding gaps at the connection locations of adjacent precast concrete panels 100.

[0071] At the same time, when the second side surface 1032 of the first connecting member 103 and the connecting end surface 104 of the precast concrete panel 100 are coplanar, to facilitate installation of the fixing block 201 and ensure a smooth surface of the precast concrete panel 100, a mounting groove 105 for mounting the fixing block 201 is provided at the connection position of adjacent precast concrete panels 100. This allows the fixing block 201 and the fastener 202 to be positioned within the mounting groove 105. Furthermore, the mounting groove 105 is filled with a protective material to isolate the fastener 202 from moisture in the outside air and prevent corrosion of the fastener 202, which would otherwise make disassembly difficult. Filling the mounting groove 105 with the protective material not only protects the fastener 202 but also ensures the smoothness and aesthetics of the surface of the precast concrete panel 100. In this embodiment, the protective material can be a soluble epoxy resin or asphalt mortar, so that when the precast concrete panel 100 needs to be disassembled, the protective material can be removed to expose the second connecting member 200, making it easier to disassemble the second connecting member 200, thereby improving the convenience of disassembling the precast concrete panel 100.

[0072] As shown in Figures 1 and 2, in one embodiment, a precast concrete panel 100 has a first surface 106 and a second surface 107 disposed opposite each other. Both the first surface 106 and the second surface 107 are perpendicular to the first side surface 1031 of the first connector 103. The end surfaces of the first connector 103 are flush with the first surface 106 and the second surface 107 of the precast concrete panel 100, respectively, to ensure the flatness of the surface of the precast concrete panel 100. Furthermore, the first surface 106 and the second surface 107 of the precast concrete panel 100 extend inwardly of the precast concrete panel 100 to form mounting grooves 105. For ease of understanding, the precast concrete panel 100 will be explained and illustrated with respect to its application to a precast concrete floor slab and a precast concrete wall panel, respectively.

[0073] When the precast concrete panel 100 is applied to a precast concrete floor, the first surface 106 and the second surface 107 of the precast concrete panel 100 are respectively the top surface and the bottom surface of the precast concrete floor. The top surface and the bottom surface of the precast concrete floor are respectively provided with mounting grooves 105. The mounting grooves 105 are formed by extending inward from the top surface and the bottom surface of the precast concrete floor. The mounting grooves 105 are located in the middle of the connection position of the precast concrete floor to install the fixing blocks 201 at both ends of the first connecting member 103. At the same time, the depth of the mounting grooves 105 is not less than the depth of the opening 1033 of the first connecting member 103, thereby ensuring that the installation position of the fixing block 201 can be adaptively adjusted and reducing the initial slippage between the first connecting member 103 and the second connecting member 200.

[0074] When the precast concrete panel 100 is applied to a precast concrete wall panel, the first surface 106 and the second surface 107 of the precast concrete panel 100 are the front surface and the rear surface of the precast concrete wall panel, respectively. The front surface and the rear surface of the precast concrete wall panel are respectively provided with mounting grooves 105. The mounting grooves 105 are formed by extending inward from the front surface and the rear surface of the precast concrete wall panel. The mounting grooves 105 are located in the middle of the horizontal connection position of adjacent precast concrete wall panels to install the fixing blocks 201 at both ends of the first connecting member 103. At the same time, the depth of the mounting grooves 105 is not less than the depth of the opening 1033 of the first connecting member 103, thereby ensuring that the installation position of the fixing block 201 can be adaptively adjusted and reducing the initial slippage between the first connecting member 103 and the second connecting member 200.

[0075] To facilitate the positioning and installation of the fixing block 201, as shown in Figures 5 to 7, a first positioning portion 1034 is provided on the first side surface 1031 of the first connecting member 103 to facilitate positioning of the fixing block 201. As shown in Figures 8 to 10, a second positioning portion 2011 is provided on the fixing block 201 to cooperate with the first positioning portion 1034. The first positioning portion 1034 and the second positioning portion 2011 cooperate to locate the installation position of the fixing block 201. It should be noted that the first positioning portion 1034 of the first connecting member 103 must be located within the installation groove 105 and the first positioning portion 1034 should be located higher than the bottom wall of the installation groove 105 to prevent the weight of the fixing block 201 from acting on the concrete 101 at the bottom wall of the installation groove 105, thereby generating additional pressure on the precast concrete slab 100 and affecting the durability of the precast concrete slab 100. At the same time, it can prevent the fixing block 201 from falling when the fixing block 201 is installed without a supporting tool.

[0076] As shown in Figures 5 and 6 , in one embodiment, the first positioning portion 1034 includes two bosses 1035 disposed on the first side surface 1031. The two bosses 1035 are located on either side of the opening 1033 of the first connector 103, and the upper surfaces of the two bosses 1035 are located on the same plane, ensuring that the fixing block 201 is installed parallel to the first surface 106 and the second surface 107 of the precast concrete panel 100. As shown in Figures 8 and 9 , the second positioning portion 2011 is the bottom surface of the fixing block 201. The upper surfaces of the bosses 1035 contact the bottom surface of the fixing block 201, so that the two bosses 1035 respectively support the ends of the fixing block 201, thereby achieving the purpose of positioning the fixing block 201. At the same time, the two bosses 1035 respectively limit the ends of the fixing block 201, preventing the fixing block 201 from rotating together with the fastener 202 when the fastener 202 is tightened, thereby facilitating the tightening of the fastener 202.

[0077] When the precast concrete panel 100 is used in a precast concrete floor slab, as shown in FIG6 , the two bosses 1035 on the upper end of the first connector 103 are on the same horizontal plane as the bottom wall of the opening 1033 of the first connector 103. This ensures that when the fixing block 201 on the upper end of the first connector 103 is supported on the two bosses 1035 on the upper end of the first connector 103, the bolt hole 2022 of the fixing block 201 is above the bottom wall of the opening 1033. This ensures that the bolt hole 2022 is exposed at the opening 1033 on the upper end of the first connector 103, facilitating connection of the fixing block 201 with the bolt 2021 through the opening 1033. At the same time, this ensures that the fixing block 201 does not rise higher than the upper end surface of the first connector 103, thereby preventing it from affecting the flatness of the top surface of the precast concrete floor slab. As shown in Figure 6, the two bosses 1035 at the lower end of the first connecting member 103 are arranged at the end portion of the lower end of the first connecting member 103, that is, the lower surface of the boss 1035 is flush with the end surface of the lower end of the first connecting member 103. While ensuring the support of the fixing block 201, the bolt hole 2022 of the fixing block 201 can be exposed at the opening 1033 at the upper end of the first connecting member 103, so that the fixing block 201 can be connected by passing the bolt 2021 through the opening 1033.

[0078] When the precast concrete panel 100 is applied to a precast concrete wall panel, as shown in the brackets in FIG7 , the bosses 1035 at both ends of the first connecting member 103 can be arranged on the same horizontal plane as the bottom wall of the opening 1033 of the first connecting member 103, so that the fixing block 201 is limited by the bosses 1035 at both ends of the first connecting member 103, ensuring that the fixing blocks 201 on both sides of adjacent first connecting members 103 are quickly aligned, so that the bolts 2021 can more conveniently pass through the bolt holes 2022 of the fixing blocks 201, thereby connecting the fixing blocks 201, improving the efficiency of connecting the first connecting member 103 through the second connecting member 200, and thereby improving the installation efficiency of the precast concrete wall panel.

[0079] As shown in Figures 7 and 10, in another specific embodiment, the first positioning portion 1034 includes two protrusions 1036 provided on the first side surface 1031. The two protrusions 1036 are located on either side of the opening 1033 of the first connector 103, and the upper surfaces of the two protrusions 1036 are located on the same plane, thereby ensuring that the fixing block 201 is installed parallel to the first surface 106 and the second surface 107 of the precast concrete panel 100. The second positioning portion 2011 includes two grooves 2012 provided on the fixing block 201. The grooves 2012 on the fixing block 201 are correspondingly configured to correspond to the protrusions 1036 of the first connector 103, so that the protrusions 1036 of the first connector 103 can be inserted into the grooves 2012 of the fixing block 201. This not only positions the fixing block 201, but also limits the rotation of the fixing block 201, facilitating the connection and fixation of the fastener 202. Furthermore, the engagement of the protrusions 1036 with the grooves 2012 prevents misalignment of the second connector 200 with the first connector 103. Specifically, as shown in FIG7 , the protrusions 1036 at both ends of the first connector 103 can be arranged on the same horizontal plane as the bottom wall of the opening 1033 of the first connector 103. When installing the fixing block 201, simply inserting the grooves 2012 on the fixing block 201 into the protrusions 1036 on the first connector 103 allows the fixing block 201 to be positioned. The protrusions 1036 at both ends of the first connector 103 limit the fixing block 201, ensuring quick installation and alignment of the fixing blocks 201 on both sides of the adjacent first connector 103. This allows the bolts 2021 to more easily penetrate the bolt holes 2022 of the fixing blocks 201, thereby connecting the fixing blocks 201. This improves the efficiency of connecting the first connector 103 via the second connector 200, thereby improving the installation efficiency of the precast concrete slab 100. It should be noted that the installation and positioning of the fixing block 201 is achieved through the cooperation between the protrusion 1036 and the groove 2012, which can be used for precast concrete wall panels and precast concrete floor slabs respectively, and there is no need to change the position of the first positioning portion 1034 of the first connecting member 103 due to the change of the connection position of the precast concrete wall panels and the precast concrete floor slabs, thereby improving the uniformity of the connection between the first connecting member 103 and the second connecting member 200, facilitating the standardized production of the precast concrete panels 100, and improving the production efficiency of the precast concrete panels 100.

[0080] In addition, the performance of the precast concrete slab connection structure was evaluated using FEA (Finite Element Analysis). Specifically, a three-dimensional finite element model of the precast concrete slab connection structure was established using ABAQUS software. As shown in Figure 12, a three-dimensional finite element model of the connection structure of a representative embodiment is provided. At the same time, in order to improve computational efficiency, the concrete portion was removed from the three-dimensional finite element model of the connection structure. Since damage mainly occurs in the connection structure when adjacent precast concrete slabs 100 are connected using the connection structure provided by the embodiment of the present invention, it is reasonable to remove the concrete from the three-dimensional finite element model of the connection structure to improve computational efficiency. During the analysis, a load based on horizontal displacement was applied to the steel bars 102 to simulate the tensile force generated at the connection position of adjacent precast concrete slabs 100 due to wind load or earthquake load applied to the precast concrete slabs 100. The equivalent plastic strain cloud diagram of the connection structure was obtained through analysis and calculation, as shown in Figure 13. From the equivalent plastic strain cloud diagram, it can be seen that the second connector 200 underwent out-of-plane bending deformation, resulting in the occurrence of the ultimate equivalent plastic strain. Moreover, the deformation capacity of the precast concrete slab connection structure is better than that of the traditional welding connection. It can be seen from the finite element analysis that the precast concrete slab connection structure has reliable performance.

[0081] The present invention also discloses a method for installing a precast concrete panel. This method uses the reusable precast concrete panel connection structure disclosed in the above embodiment. Therefore, this precast concrete panel connection structure has all the technical effects of the above precast concrete panel connection structure. The details will not be described in detail here. As shown in FIG14 , the precast concrete panel installation method includes:

[0082] Step S100, installing a first connecting member;

[0083] The first side 1031 of the first connector 103 is connected and fixed to the end of the steel bars 102 of the precast concrete slab 100 to form a steel bar skeleton. Specifically, in this embodiment, the first side 1031 of the first connector 103 and the end of the steel bars 102 of the precast concrete slab 100 can be connected and fixed by welding or bolting (threaded connection). When the precast concrete slab 100 is a precast concrete floor slab, the first side 1031 of the first connector 103 is welded and fixed to the end of the transverse steel bars of the precast concrete floor slab; when the precast concrete slab 100 is a precast concrete wall slab, the first side 1031 of the first connector 103 is welded and fixed to the end of the horizontal distribution bars of the precast concrete wall slab. Of course, the first connector 103 and the steel bars 102 can also be formed into an integrated structure by casting, but the production process is more complex and costly. The specific implementation method has been explained and illustrated in the above embodiment and will not be repeated here.

[0084] Step S101, pouring concrete;

[0085] The steel bar skeleton is placed in the casting template 300, with the second side surface 1032 of the first connector 103 in close contact with the inner wall of the casting template 300, as shown in FIG11 . This ensures that the second side surface 1032 of the first connector 103 and the connecting end surface 104 of the precast concrete slab 100 are in the same plane, thereby preventing gaps from forming at the connection points of adjacent precast concrete slabs 100. Simultaneously, the end surfaces of the first connector 103 are flush with the upper and lower surfaces of the casting template 300, respectively, to ensure that the first surface 106 and the second surface 107 of the precast concrete slab 100 after casting are flush with the end surfaces of the first connector 103, thereby ensuring the flatness of the surface of the precast concrete slab 100. Concrete 101 is poured into the casting template 300 using a pouring device to form the precast concrete slab 100.

[0086] During the pouring process, a mounting groove 105 for the second connecting component must be reserved on the precast concrete slab 100 to facilitate installation. Specifically, a partial formwork is secured to the casting formwork 300. The dimensions of the partial formwork match those of the mounting groove 105, and the partial formwork is positioned at the location of the mounting groove 105, i.e., the location where the second connecting component is to be installed. At this point, concrete 101 is simply poured between the partial formwork and the casting formwork 300 using pouring equipment, creating a non-casting area within the partial formwork. After curing is complete, the non-casting area within the partial formwork forms the mounting groove 105 for the second connecting component.

[0087] Step S102, installing precast concrete slabs;

[0088] The two ends of the precast concrete panels 100 are supported on the load-bearing members, and the second side surfaces 1032 of the first connectors 103 of adjacent precast concrete panels 100 are closely aligned. The first connectors 103 are then connected and fixed using the second connecting assembly. Specifically, when the precast concrete panels 100 are processed at the factory and transported to the site for installation, the two ends of the precast concrete panels 100 are first supported on the load-bearing members, and the second side surfaces 1032 of the first connectors 103 of adjacent precast concrete panels 100 are closely aligned. At this time, the first connectors 103 of adjacent precast concrete panels 100 are connected and fixed using the second connecting assembly to ensure a reliable connection between the adjacent precast concrete panels 100, thereby improving the convenience of connecting the adjacent precast concrete panels 100 and the installation efficiency.

[0089] Step S103, filling with protective material;

[0090] Using a soluble epoxy resin or asphalt mortar to fill the mounting grooves 105 at the connection points of adjacent precast concrete panels 100 protects the second connecting component while ensuring the surface smoothness of the precast concrete panels 100. Furthermore, by using a soluble epoxy resin or asphalt mortar, when the precast concrete panels 100 need to be disassembled, the protective material can be removed, exposing the second connecting component, facilitating disassembly and improving the ease of disassembly of the precast concrete panels 100. When epoxy resin is used as the protective material, it can be softened by chemical treatment, such as with a strong solvent like ethylene dichloride, or by heating at 130°C to 150°C, before being removed mechanically. When asphalt mortar is used as the protective material, it can be soaked in kerosene to dissolve the asphalt, allowing it to be removed.

[0091] The terms "first," "second," and the like in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.

[0092] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reusable precast concrete panel connection structure, characterized in that: include: A precast concrete panel (100), comprising concrete (101), steel bars (102) located in the concrete (101), and a first connecting member (103) exposed from the concrete (101), wherein the first connecting member (103) has a first side surface (1031) and a second side surface (1032) arranged opposite to each other, the first side surface (1031) of the first connecting member (103) being connected to the steel bars (102) and being in close contact with the second side surface (1032) of the first connecting member (103) of the adjacent precast concrete panel (100); The second connecting component is used to connect and fix the adjacent first connecting member (103), and the second connecting component and the first connecting member (103) are detachably connected.

2. The reusable precast concrete panel connection structure according to claim 1, characterized in that: The second connection assembly comprises second connection members (200) respectively arranged at both ends of the first connection member (103), and the two second connection members (200) respectively connect and fix the two ends of the first connection members (103) of the adjacent precast concrete panels (100).

3. The reusable precast concrete panel connection structure according to claim 2, characterized in that: The second connecting member (200) comprises a fixing block (201) for abutting against the first side surface (1031) of the first connecting member (103) and a fastener (202) matched with the fixing block (201); there are two fixing blocks (201), and the two fixing blocks (201) respectively abut against the first side surfaces (1031) of the two first connecting members (103) that are closely attached; the two fixing blocks (201) clamp the first connecting members (103) of the adjacent precast concrete panels (100) through the fastener (202).

4. The reusable precast concrete panel connection structure according to claim 3, characterized in that: The second side surface (1032) of the first connecting member (103) and the connecting end surface (104) of the precast concrete panel (100) are on the same plane, and a mounting groove (105) for mounting the fixing block (201) is provided at a connection position adjacent to the precast concrete panel (100), so that the fixing block (201) and the fastener (202) are located in the mounting groove (105), and the mounting groove (105) is filled with a protective material.

5. The reusable precast concrete panel connection structure according to claim 4, characterized in that: The precast concrete panel (100) has a first surface (106) and a second surface (107) that are arranged opposite to each other, the first surface (106) and the second surface (107) are both perpendicular to the first side surface (1031) of the first connecting member (103), and the first surface (106) and the second surface (107) of the precast concrete panel (100) respectively extend toward the inner side of the precast concrete panel (100) to form the installation groove (105).

6. The reusable precast concrete panel connection structure according to claim 4, characterized in that: The fastener (202) comprises a bolt (2021) and a bolt hole (2022) provided on the fixing block (201) and cooperating with the bolt (2021); the first connecting member (103) is provided with an opening (1033) for avoiding the bolt (2021), so that the bolt (2021) passes through the opening (1033) of the first connecting member (103) and is connected to the fixing block (201); the length of the fixing block (201) is greater than the width of the opening (1033), so that the fixing block (201) abuts against the first side surface (1031) of the first connecting member (103).

7. The reusable precast concrete panel connection structure according to claim 6, characterized in that: A first positioning portion (1034) for positioning the fixing block (201) is provided on the first side surface (1031) of the first connecting member (103), and a second positioning portion (2011) cooperating with the first positioning portion (1034) is provided on the fixing block (201). The first positioning portion (1034) and the second positioning portion (2011) cooperate to locate the installation position of the fixing block (201).

8. The reusable precast concrete panel connection structure according to claim 7, characterized in that: The first positioning portion (1034) includes two bosses (1035) provided on the first side surface (1031), the two bosses (1035) are respectively located on both sides of the opening (1033) of the first connecting member (103), and the upper surfaces of the two bosses (1035) are located on the same plane, the second positioning portion (2011) is the bottom surface of the fixing block (201), and the upper surface of the boss (1035) contacts the bottom surface of the fixing block (201), so that the two bosses (1035) respectively support the two ends of the fixing block (201); or, The first positioning portion (1034) includes two protrusions (1036) arranged on the first side surface (1031), the two protrusions (1036) are respectively located on both sides of the opening (1033) of the first connecting member (103), and the upper surfaces of the two protrusions (1036) are located on the same plane. The second positioning portion (2011) includes two grooves (2012) arranged on the fixing block (201), and the grooves (2012) on the fixing block (201) are correspondingly arranged to the protrusions (1036) of the first connecting member (103), so that the protrusions (1036) of the first connecting member (103) are inserted into the grooves (2012) of the fixing block (201).

9. The reusable precast concrete panel connection structure according to any one of claims 1 to 8, characterized in that: The first connecting member (103) and the steel bar (102) are an integrated structure; or the first connecting member (103) and the steel bar (102) are connected and fixed by welding.

10. A method for installing a precast concrete panel, the method using the reusable precast concrete panel connection structure according to any one of claims 1 to 9, characterized in that: Including steps: Installing a first connecting member, and fixing a first side surface (1031) of the first connecting member (103) to an end portion of a steel bar (102) of the precast concrete slab (100) by welding to form a steel bar skeleton; Casting concrete, placing the steel skeleton in a casting template (300), with the second side surface (1032) of the first connecting member (103) in close contact with the inner wall of the casting template (300), and casting concrete (101) into the casting template (300) by a casting device to form the precast concrete panel (100), wherein the precast concrete panel (100) is provided with a mounting groove (105) for mounting the second connecting component; Installing a precast concrete panel, supporting both ends of the precast concrete panel (100) on a load-bearing member, closely contacting the second side surface (1032) of the first connecting member (103) adjacent to the precast concrete panel (100), and connecting and fixing the first connecting member (103) via the second connecting assembly; Filling protective material, using epoxy resin or asphalt mortar to fill the installation groove (105) at the connection of adjacent precast concrete panels (100).

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