Connecting structure, fabricated building applying same and construction method

Abstract

The invention discloses a connecting structure, a fabricated building applying the same and a construction method, and belongs to the technical field of fabricated buildings. The problems that a modular building is narrow in butt joint, low in joint rigidity and weak in connection are solved. The connecting structure comprises unit plates, connecting plates and blocking plates. The four corners of each unit plate are sunken to form connecting parts, and steel wire meshes are arranged in the unit plates and poured through lightweight aggregate concrete. The inner rib plates of the connecting plates are embedded into the unit plate connecting parts, the outer rib plates wrap the anchoring steel bars, and rib shoulders at two ends wrap the connecting steel bars; rib shoulders are buckled on the blocking plates for sealing, and concrete is poured into through cavities between the adjacent unit plates. The fabricated building is formed by splicing wallboard units, and the connecting structure is arranged in beam and column pouring spaces of the fabricated building. The construction comprises the steps of unit plate manufacturing, anchoring steel bar mounting, hoisting, seam sealing, pouring and the like. Multiple stress guarantee is achieved, the joint rigidity and stress performance are improved, the unit plates are light in weight, grout leakage prevention and high efficiency are achieved during construction, and the problem of weak connection of modular buildings is effectively solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of prefabricated buildings, and particularly relates to a connecting structure, a prefabricated building applying the structure and a construction method. BACKGROUND

[0002] As a modern construction method, prefabricated buildings, especially modular buildings, prefabricate the entire room into an assembly unit, and only the "edge-to-edge" or "corner-to-corner" joint between the units needs to be assembled on site, which greatly shortens the construction period. However, the joint area is only left with a 30 mm to 50 mm assembly gap, and it is not possible to set a long enough steel anchoring segment as in the traditional prefabricated frame. As a result, the vertical load is only transmitted through the supporting pad, and the shear, bending and energy dissipation capacity required by the horizontal earthquake or wind load can only rely on the mortar, grouting material or small steel plate inserted in the narrow gap. This makes the effective stress area of the prefabricated building in the beam-column area insufficient to be 30% of the complete beam-column section, and the joint stiffness is only 20% to 35% of the cast-in-place joint.

[0003] For example, the utility model patent with the authorization number CN207003644U proposes a low-layer prefabricated beam-column joint, which discloses a low-layer prefabricated beam-column joint, which comprises a prefabricated column and a prefabricated beam. One end of the prefabricated beam is spliced with the side wall of the prefabricated column. The end of the prefabricated beam spliced with the prefabricated column is pre-buried with a connecting piece, and the connecting piece is connected through bolts, without the need for cast-in-place concrete. However, the connecting piece forms a hollow weak area inside the component, which has a negative impact on the overall stress of the structure and the safety of the building. SUMMARY

[0004] In order to solve the problems existing in the prior art, a connecting structure, a prefabricated building applying the structure and a construction method are proposed.

[0005] The technical solution for solving the technical problem of the application is as follows: first, a connecting structure is proposed, which comprises: a unit plate, the four corners of the unit plate are recessed inward to form a connecting part, and four groups of adjacent unit plates form a through cavity, and the through cavity is poured with concrete; a connecting plate, the inner side of the connecting plate is protruded inward to form a plurality of inner rib plates, the inner rib plates are embedded in the connecting part, the outer side of the connecting plate is protruded outward to form a plurality of outer rib plates, and the outer rib plates are wrapped with anchor steel bars; the two ends of the connecting plate are respectively rolled inward to form rib shoulders, and the rib shoulders are wrapped with connecting steel bars; a blocking plate, the blocking plate is buckled on the rib shoulders of two adjacent unit plates, and the two wings of the blocking plate are wrapped around the two rib shoulders after being extruded.

[0006] Preferably, the inner rib plates and the outer rib plates on the connecting plate are T-shaped ribs, the two wings of the inner rib plates are embedded in the connecting part, and the two wings of the outer rib plates are bent inward, so that the end points of the two wings of the outer rib plates are attached to the middle rod of the T-shaped rib.

[0007] Preferably, the inner rib plate and the outer rib plate on the connecting plate are both non-equilateral rib plates, the inner rib plate is embedded into the connecting part, and the outer side of the outer rib plate is bent outward, so that one side rib wing of the outer rib plate wraps around the anchoring steel bar and is attached to the other side rib wing of the outer rib plate.

[0008] Preferably, the unit plate is made of lightweight aggregate concrete, and a steel mesh replacing structural steel bars is arranged in the unit plate, the steel mesh is a closed cage formed by weaving steel wires, and a grid for dispersing stress is uniformly arranged on the steel mesh.

[0009] Preferably, the sealing plate is an Ω-shaped steel plate, the sealing plate is buckled across the joint on the outer wall of the rib shoulder to form a continuous sealing line for preventing concrete pouring leakage.

[0010] Secondly, an assembly type building using the connecting mechanism is provided, which includes wall plate units, and the wall plate units are spliced to form a building body; the wall plate units include horizontal unit plates, vertical unit plates and longitudinal unit plates, the three groups of unit plates are connected to each other perpendicularly to form the wall plate units, connecting parts between adjacent four groups of wall plate units form horizontal beam pouring spaces, longitudinal beam pouring spaces and vertical column pouring spaces, and the connecting structure according to any one of claims 1-5 is arranged in the beam pouring spaces and the column pouring spaces.

[0011] Finally, a construction method of the assembly type building is provided, which includes the following steps: S1. Unit plate manufacturing; S2. Preparation; on the construction site, according to the design drawings and construction requirements, the installation positions of the unit plates are marked and laid out; at the same time, the installation area is cleaned of sundries and obstacles to ensure the flatness and cleanliness of the installation area; S3. Anchoring steel bar installation; the anchoring steel bars are arranged along the rib length direction at the end of the outer rib plate of each unit plate to realize the connection between the unit plates in the direction of the outer rib plate; the opening hydraulic clamp is horizontally aligned with the rib axillary on both sides, and the clamp is gradually and synchronously pressed, and the steel bar is checked in real time; after the rib plate is plastically bent around the steel bar, the pressure is released, and then the folded edge is lightly tapped with a soft hammer to make the steel plate closely attached to the steel bar; S4. Correction; the wrapping condition of the outer rib plate around the steel bar is checked, and the back clamp is used to supplement the pressure to completely attach to the local position with a gap; S5. Wall plate unit installation; the horizontal unit plates, the vertical unit plates and the longitudinal unit plates with the installed anchoring steel bars are butted to form the wall plate units; S6. Wall plate unit hoisting; the special hoisting beam and the adjustable hoisting cable are used, the lower end of the hoisting cable is directly hooked to the hoisting sleeve embedded in the wall plate unit through the rotating lock buckle, and each wall plate unit is hoisted to the marked position; S7. Adjacent unit plate joint; the joint formed by the abutting of adjacent wall plate units is a pouring space of a transverse beam perpendicular to each other, a pouring space of a longitudinal beam and a pouring space of a column, along the rib length direction of the profiled steel plate, a cross-joint clamping plate in the shape of omega is buckled at the corresponding position, so that the two flanges of the clamping plate are overlapped on the rib shoulder of the two wall plate units respectively, forming a continuous and closed linear sealing; S8. In-situ pouring; a foldable funnel-shaped fairing is arranged at the upper opening of the column pouring space, then a pump pipe is slowly inserted along the opening, and the concrete is continuously and lowly laminarly lifted upwards from the bottom of the column pouring space; when the concrete slurry surface rises to the top of the cavity and slightly overflows, a slow back-pumping pump is immediately used to suck back the excess concrete; S9. Maintenance and inspection; after the concrete pouring is completed, a moisture-retaining film is immediately covered on the top of the column, and the moisture-retaining maintenance is continued for seven days; after seven days, the film is removed, a breathable curing blanket is covered, and the static state is continued until the specified age; the early strength is detected by using a rebound hammer on the final setting day, and whether the concrete strength and compactness meet the design requirements is verified.

[0012] Preferably, the unit plate manufacturing step comprises: galvanized steel wires are designed and manufactured into three-dimensional cages according to the size of the unit plate, and openings are left at pouring positions; the detachable formwork and the connecting plate are fixed in place, the inner side of the detachable formwork is coated with release oil, and metal seats are pre-fixed at the corresponding positions of the formwork bottom and side formwork for fixing the steel wire mesh; after the steel wire cage is fixed with the seat, light aggregate concrete is poured and vibrated, and the unit plate with the steel wire mesh and the connecting plate is formed after demolding.

[0013] Compared with the prior art, the above technical solution has the following advantages or beneficial effects: 1. The present application realizes multiple stress protection by embedding and wrapping the anchoring steel bars after the connection of the connecting plate, and finally pouring the through cavity as a whole: the inner rib plate of the connecting plate is embedded in the connection part of the unit plate to form a tight fit, the outer rib plate wraps the anchoring steel bars to build a reliable anchoring system, and the cast-in-place concrete in the through cavity fuses the adjacent unit plates, the connecting plate and the steel bars into a whole stress structure, greatly expands the effective stress area of the joint, significantly improves the shear resistance, bending resistance and energy dissipation performance, and makes the joint stiffness closer to the cast-in-place joint, fundamentally solving the weak connection problem of the modular building butt joint area and improving the safety of the building structure.

[0014] 2. The unit plate of the present application combines light aggregate concrete with a three-dimensional galvanized steel wire mesh cage, which can not only reduce weight but also improve structural strength: on the one hand, light aggregate concrete can further reduce the self-weight of the component compared to ordinary concrete, reducing the load of the component transportation and hoisting equipment; on the other hand, the three-dimensional steel wire mesh cage is a closed structure, and its grid design for stress dispersion can ensure uniform stress transmission of the unit plate, while replacing the traditional structure steel bar binding process, reducing the amount of steel, and reducing the labor and material costs in the prefabrication stage.

[0015] 3. The construction method of the present application solves the problem of concrete pouring leakage by forming a continuous sealing line through the rib shoulder of the Ω-shaped blocking plate, and guarantees the density of the cast-in-place section; the synchronous pressing of the anchoring steel bars by the open hydraulic clamp, real-time checking, and the slow back-pumping of the excess concrete, avoid segregation and air bubbles; the column pouring space adopts a foldable funnel-shaped fairing to realize laminar pouring, and the slow back-pumping pump is used to remove the excess concrete, avoiding segregation and air bubbles. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments thereof, together with explanations and descriptions thereof, and do not constitute improper limitations on the present application.

[0017] Figure 1 Positional diagram of the connecting plate and T-shaped outer rib plate of the present application; Figure 2 Structure diagram of the closed-type profiled steel plate after extrusion of the present application; Figure 3 Positional diagram of the unequal-side outer rib plate of the present application; Figure 4 Structure diagram of the unequal-side outer rib plate after extrusion of the present application; Figure 5 Structure diagram of the connecting plate rib shoulder at the joint of the present application; Figure 6 Structure diagram of the connecting plate rib shoulder after extrusion at the joint of the present application; Figure 7 Installation diagram of the blocking plate at the joint of the present application; Figure 8 Diagram of the blocking plate after extrusion of the steel bars at the joint of the present application; Figure 9 Diagram of the steel mesh of the present application; Figure 10 Structure diagram of the column pouring space of the present application; Figure 11 Structure diagram of the column pouring space after installation of the steel bars of the present application; Figure 12 Structure diagram of the beam pouring space of the present application; Figure 13 Diagram of the beam pouring space after installation of the steel bars of the present application; Figure 14 Three-dimensional structure diagram of a single wall unit of the present application; Figure 15 Three-dimensional structure diagram of the steel bar arrangement of a single wall unit of the present application.

[0018] Reference numerals: 1, unit plate; 2, connecting part; 3, through cavity; 4, connecting plate; 41, inner rib plate; 42, outer rib plate; 43, rib shoulder; 44, middle rod body; 5, anchoring steel bar; 6, blocking plate; 7, connecting steel bar; 8, wall plate unit; 9, column pouring space; 10, beam pouring space; 11, steel mesh. DETAILED DESCRIPTION

[0019] In order to clearly illustrate the technical features of the present application, the following will be described in detail through specific embodiments, and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing the various structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present application omits the description of well-known components and processing techniques and processes to avoid unnecessary limitations on the present application. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be a fixed connection, or it can be a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Example one: Please refer to Figures 1-10In the connecting node construction part of the embodiment, a closed profiled steel sheet is used as a connecting carrier, the inner ribs of the connecting plate 4 are embedded in the end of the prefabricated unit plate 1, the outer ribs are bent to wrap and clamp the anchoring steel bars 5 of the post-cast beam column, mechanical anchoring and shear keys are formed, the anchoring steel bars 5 are continuously force-transmitted, sleeve grouting is not needed, the node stiffness and bearing capacity reach the level of cast-in-place, and the problems of weak connection caused by small assembly joints and insufficient anchoring are solved. The connecting structure in the embodiment is used for splicing and fixing in fabricated buildings, and the core includes three components of the unit plate 1, the connecting plate 4 and the sealing plate 6, and the specific structure is as follows: The unit plate 1 is in the shape of a rectangular plate as a whole, the thickness of the plate body is designed to be 100-150 mm according to the building load requirement; the four corners are recessed inward to form connecting parts 2 by numerical control cutting process, so that when four groups of unit plates 1 are spliced, the four groups of connecting parts 2 enclose a through cavity 3 with a rectangular cross section, the cavity is through from top to bottom and the inner wall is smooth, providing a channel for concrete pouring, and the concrete used for pouring is high-strength concrete, the specific mix proportion of which includes P.O 52.5 cement, quartz sand, fly ash, slag, sinking beads, water reducing agent, copper-plated steel microfilament and water reducing agent, and needs to be vibrated and compacted to fill the cavity gap.

[0021] The connecting plate 4 is made of a galvanized profiled steel sheet with a thickness of 3-5 mm, and the profiled steel sheet is a light material with a rib shape by cold rolling process of 2-3 mm thin steel sheet. Among them, the closed profiled steel sheet is folded downward at the edge of the plate and closed to form a continuous closed rib cross section, which has higher structural strength and sealing performance. In building construction, the profiled steel sheet can not only be used as a permanent formwork during concrete pouring, but also can play the role of stress reinforcement; if light aggregate concrete is used to pour the component, the structure weight can be reduced by more than 25%, and the difficulty of component transportation and hoisting is reduced. In addition, in the weak areas such as beam-column joints and wall panel joints, the profiled steel sheet is combined with post-cast concrete, the rib part can play the role of shear key, and the interface cooperative work capacity is greatly improved, therefore, the closed profiled steel sheet is used as the specific manufacturing form of the connecting plate 4 in the embodiment.

[0022] The plate body size matches the side edge of the unit plate 1, that is, the length is consistent with the height of the unit plate 1, and the width is adapted to the thickness of the unit plate 1; the inner side of one side of the plate body facing the unit plate 1 is formed by stamping process to form 3-5 inner rib plates 41 protruding inward, the inner rib plates 41 are uniformly distributed along the length direction of the connecting plate 4, the protruding height is consistent with the depth of the connecting part 2, which ensures that the inner rib plates 41 can be completely embedded in the connecting part 2, and the gap between the rib plate and the inner wall of the connecting part 2 after embedding is ≤1mm; the outer side of the connecting plate 4 corresponds to the position of the inner rib plate 41 to form 3-5 outer rib plates 42 protruding outward, the protruding height of the outer rib plate 42 is 40-60mm, 1-2 HRB400 grade anchor reinforcing steel bars 5 are wrapped on each outer rib plate 42, and the length of the reinforcing steel bar exceeds the two ends of the outer rib plate 42, so as to realize the longitudinal connection of adjacent unit plates 1; in addition, the two ends of the connecting plate 4 are rolled inward along the length direction to form arc rib shoulders 43, and 1 HRB400 grade connecting reinforcing steel bar 7 is wrapped in the inner side of the rib shoulder 43.

[0023] The sealing plate 6 is made of cold-rolled steel plate with a thickness of 2-3mm, which is bent to form an arc-shaped structure, and the arc is adapted to the arc of the rib shoulder 43 of the connecting plate 4; when the two adjacent unit plates 1 are spliced, the sealing plate 6 is buckled on the rib shoulder 43 of the two unit plates 1, and the center line of the sealing plate 6 is aligned with the joint during buckling, and then the two wings of the sealing plate 6 are extruded by using a manual pressure clamp, so that the two wings tightly wrap the rib shoulder 43, and the gap between the two wings and the rib shoulder 43 after wrapping is ≤0.5mm, forming a sealed structure.

[0024] The connecting part 2 formed by the recesses at the four corners of the unit plate 1 cooperates with the through cavity 3, and the concrete is poured to form a rigid connection between the adjacent unit plates 1, greatly improve the overall structure, and avoid cracking at the joint; the inner rib plate 41 of the connecting plate 4 is embedded in the connecting part 2 of the unit plate 1, the outer rib plate 42 wraps the anchor reinforcing steel bar 5, the double connection structure enhances the connection strength of the unit plate 1 and the connecting plate 4, and the rib shoulder 43 wraps the connecting reinforcing steel bar 7 to further improve the transverse tensile property; the sealing plate 6 extrudes and wraps the rib shoulder 43 to form a seal, which can effectively prevent concrete leakage during pouring, ensure the pouring density, and reduce the later repair cost, so that the above structure forms a whole connecting structure of the fabricated building, and the connection effect is good.

[0025] Example two: Continuing to refer to Figures 1-10 In this embodiment, a structure of inner rib plate 41 and outer rib plate 42 is proposed, the inner rib plate 41 and the outer rib plate 42 on the connecting plate 4 of this embodiment are both T-shaped ribs, the two wings of the inner rib plate 41 are embedded in the connecting part 2, and during installation, the two wings of the outer rib plate 42 are bent inward, so that the end points of the two wings of the outer rib plate 42 are attached to the middle rod 44 of the T-shaped rib, forming an anchoring structure to realize rapid connection on site.

[0026] Example three: Continuing to refer toFigures 1-10 The embodiment proposes another structure of the inner rib plate 41 and the outer rib plate 42, the inner rib plate 41 and the outer rib plate 42 on the connecting plate 4 are all unequal-sided rib plates, the inner rib plate 41 is embedded into the connecting part 2, and is bent outward at the outer side of the outer rib plate 42 during installation, so that one side rib wing of the outer rib plate 42 is wrapped around the anchoring steel bar 5 and is attached to the other side rib wing of the outer rib plate 42, thereby achieving the connection.

[0027] In specific use, the rib plate structure in Embodiment Two or Embodiment Three can be applied according to the needs of specific structures and the difficulty of bending the outer rib plate 42, so as to simplify the on-site process and reduce the construction error.

[0028] Embodiment Four: Please refer to Figures 9-13 The embodiment is based on Embodiment One, and proposes a unit plate 1 structure, the unit plate 1 is made of lightweight aggregate concrete, and a steel wire mesh 11 is embedded therein, and the specific details are as follows: Lightweight aggregate concrete parameters: the lightweight aggregate is selected as ceramsite (particle size 5-10 mm), and the concrete mixing ratio is: cement (P.O42.5): ceramsite: sand: water: additive = 1:2.5:1.8:0.5:0.02, and the dry density of the concrete is 1600-1800 kg / m 3 , the compressive strength grade is ≥C30, the thermal conductivity is ≤0.6 W / (m K), and the lightweight and thermal insulation properties are combined; during pouring, layered pouring (each layer has a thickness of 50-80 mm) is adopted, and an insertion type vibrator (vibration frequency 50-60 Hz) is used for vibration, so as to ensure the compactness (compactness ≥98%).

[0029] Steel wire mesh 11 structure: the steel wire mesh 11 is woven by galvanized steel wires with a diameter of 4-6 mm, and the weaving method is warp and weft interlacing (spacing 50-100 mm), so as to form a closed cage; the cage size is consistent with the unit plate 1, and the cage corners are reinforced by spot welding (welding spot diameter 8-10 mm) to prevent deformation; the steel wire mesh 11 is uniformly provided with square grids with a side length of 50-100 mm, and the edges of the grids are rounded to avoid stress concentration.

[0030] Combination of the steel wire mesh 11 and the unit plate 1: the steel wire mesh 11 is completely embedded in the unit plate 1, and the distance from the surface of the unit plate 1 is ≥20 mm, which is the thickness of the protective layer, and the steel wire mesh 11 is fixed with the inner rib plate 41 in the connecting plate 4 by steel binding, and the binding point spacing is 150-200 mm, so as to ensure that the steel wire mesh 11 does not deviate during pouring, and to form an integrated structure of the concrete, the steel wire mesh 11 and the connecting plate 4, thereby replacing the structural steel bars in the traditional fabricated house.

[0031] Embodiment Five: Please refer to Figures 5-8The blocking plate 6 of the embodiment is an Ω-shaped steel plate, which is buckled on the outer wall of the rib shoulder 43 to form a continuous sealing line to prevent concrete pouring leakage. The Ω-shaped structure perfectly matches the arc of the rib shoulder 43, and compared with the flat blocking plate 6, the fitting area is increased by 50%, the sealing effect is better, and the leakage of concrete pouring can be effectively prevented to avoid defects such as honeycomb and pitted surface in the cavity.

[0032] Embodiment six: Please refer to Figures 1-15 Based on the above-mentioned embodiments, the embodiment provides a fabricated building applying the connecting structure, which comprises wall panel units 8, the wall panel units 8 are basic assembly units of the building, and the wall panel units 8 are spliced to form a building body; the wall panel units 8 comprise transverse unit panels 1, longitudinal unit panels 1 and vertical unit panels 1, and the three groups of unit panels 1 are connected with each other perpendicularly to form the wall panel units 8; wherein the transverse unit panels 1, the longitudinal unit panels 1 and the vertical unit panels 1 in each wall panel unit 8 can select the number of unit panels 1 in the direction according to the height, length and width required by the building, and the connecting parts 2 between the adjacent four wall panel units 8 form transverse beam pouring spaces 10, longitudinal beam pouring spaces 10 and vertical column pouring spaces 9, and the connecting structure is arranged in the beam pouring spaces 10 and the column pouring spaces 9, and after the connection is completed, the beam pouring spaces 10 and the column pouring spaces 9 are poured with concrete.

[0033] Embodiment seven: Please refer to Figures 1-15 Based on the fabricated building of the embodiment, the embodiment provides a construction method of the fabricated building, which comprises the following steps: S0. Overall design of modular structure; first determine the new modular system in the BIM software, divide the unit panels 1 of the prefabricated lightweight aggregate concrete, do not leave steel bars in the unit, and only arrange the continuous closed steel wire mesh 11; reserve the through cavity 3 at the joint of the adjacent unit panels 1, and the cavity forms the post-cast “column” or “beam” space in the subsequent floor; S1. Unit panel 1 production; galvanized steel wire is designed and produced into a three-dimensional cage according to the size of the unit panel 1, and an opening is reserved at the pouring position; the detachable formwork and the connecting plate 4 are fixed in place, the inside of the detachable formwork is coated with release oil, and metal seats are pre-fixed at the corresponding positions of the formwork bottom die and side die for fixing the steel wire mesh 11; after the steel wire cage and the seat are fixed, the lightweight aggregate concrete is poured and vibrated, and after demolding, the unit panel 1 with the steel wire mesh 11 and the connecting plate 4 is formed; S2. Preparation; according to the design drawing and construction requirements, the installation position of the unit panel 1 is marked and marked on the construction site; at the same time, the installation area is cleaned of debris and obstacles to ensure the flatness and cleanliness of the installation area; S3. Anchoring steel bar 5 installation; arranging anchoring steel bar 5 along the length direction of the rib at the end of the outer rib plate 42 of each unit plate 1 to realize the connection between unit plates 1 in the direction of the outer rib plate 42; using the rib axilla of the outer rib plate 42 as the pressure folding area, horizontally aligning the jaws of the open hydraulic clamp on both sides of the rib axilla, synchronously and gradually increasing the pressure, and checking the steel bar in real time; after the plastic bending of the rib plate embraces the steel bar, releasing the pressure, and immediately tapping the folded edge with a soft-faced hammer to make the steel plate and the steel bar adhere closely; S4. Correction; checking the condition of the outer rib plate 42 wrapping the steel bar, and using a back clamp to supplement the pressure to completely adhere to the local position with a gap; S5. Wall plate unit 8 installation; abutting the transverse unit plate 1, longitudinal unit plate 1 and vertical unit plate 1 with installed anchoring steel bar 5 to form a wall plate unit 8; S6. Wall plate unit 8 hoisting; using a special hoisting beam and an adjustable hoisting cable, the lower end of the hoisting cable is directly hooked to the hoisting sleeve embedded in the wall plate unit 8 through a rotating lock buckle to hoist each wall plate unit 8 to the marked position; S7. Adjacent unit plate 1 joint; pouring space 10, longitudinal beam pouring space 10 and column pouring space 9 formed by abutting the adjacent wall plate units 8 perpendicular to each other, along the length direction of the profiled steel plate rib, the Ω-shaped sealing plate 6 is buckled at the corresponding position to make the two flanges of the sealing plate 6 overlap the rib shoulders 43 of the two wall plate units 8 respectively to form a continuous and airtight linear sealing; S8. On-site pouring; two workers arrange a foldable funnel-shaped flow guide cover at the top of the column pouring space 9, then slowly insert the pump pipe along the cover opening, and the concrete rises upward from the bottom of the column pouring space 9 in a continuous and low-impact laminar flow manner; during the pumping process, one person taps the outer rib of the profiled steel plate with a long-handled rubber hammer, and the other person uses a small vibrating rod to vibrate step by step along the inside of the steel bar to drive away the bubbles and ensure the engagement and compaction of the unit plate 1 trough and the concrete; when the concrete slurry surface rises to the top of the cavity and slightly overflows, immediately use a slow backslip pump to suck the excess concrete; S9. Maintenance and inspection; after the concrete pouring is completed, immediately cover the top of the column with a moisture-retaining film for continuous moisture-retaining maintenance for seven days; after seven days, remove the film and cover it with a breathable curing blanket for continuous standing until the specified age, and use a rebound hammer to detect the early strength on the final setting day to verify whether the concrete strength and density meet the design requirements.

[0034] Although the specific embodiments of the application are described above with reference to the drawings, it is not a limitation on the protection scope of the application. Various modifications or variations made by those skilled in the art on the basis of the technical solutions of the application without creative labor are still within the protection scope of the application.

Claims

1. A connection structure, characterized in that, include: Unit plate (1), the four corners of unit plate (1) are recessed inward to form a connecting part (2), and a through cavity (3) is formed between four adjacent units (1), and concrete is poured into the through cavity (3); The connecting plate (4) has several inner ribs (41) protruding inward on its inner side. The inner ribs (41) are embedded in the connecting part (2). The outer side of the connecting plate (4) protrudes outward to form several outer ribs (42). Anchor steel bars (5) are wrapped on the outer ribs (42). The two ends of the connecting plate (4) are rolled inward to form rib shoulders (43). The rib shoulders (43) are wrapped with connecting steel bars (7). The sealing plate (6) is fastened to the shoulder (43) of the two adjacent unit plates (1). The two wings of the sealing plate (6) wrap around the two shoulder (43) after being squeezed.

2. The connection structure according to claim 1, characterized in that: The inner rib (41) and outer rib (42) on the connecting plate (4) are both T-shaped ribs. The two wings of the inner rib (41) are embedded in the connecting part (2), and the two wings of the outer rib (42) are bent inward so that the ends of the two wings of the outer rib (42) fit into the middle rod (44) of the T-shaped rib.

3. The connection structure according to claim 1, characterized in that: The inner rib (41) and outer rib (42) on the connecting plate (4) are both unequal-sided ribs. The inner rib (41) is embedded in the connecting part (2), and the outer side of the outer rib (42) bends outward so that one side of the outer rib (42) wraps the anchoring steel bar (5) and then fits with the other side of the outer rib (42).

4. The connection structure according to claim 1, characterized in that: The unit plate (1) is made of lightweight aggregate concrete. The unit plate (1) is provided with a wire mesh (11) to replace the structural steel bars. The wire mesh (11) is a closed cage formed by steel wire weaving. The wire mesh (11) is evenly provided with a grid to disperse stress.

5. The connection structure according to claim 1, characterized in that: The sealing plate (6) is an Ω-shaped steel plate. The sealing plate (6) is fastened across the seam to the outer wall of the shoulder (43) to form a continuous sealing line to prevent concrete pouring leakage.

6. The connection structure according to claim 1, characterized in that: The connecting plate (4) is a closed-type profiled steel sheet.

7. A prefabricated building using the connection mechanism described in any one of claims 1-6, characterized in that, The wall panel unit (8) is assembled to form the building body. The wall panel unit (8) includes a horizontal unit panel (1), a vertical unit panel (1) and a vertical unit panel (1). The three sets of unit panels (1) are perpendicularly connected to each other to form the wall panel unit (8). The connection parts (2) of the four adjacent sets of wall panel units (8) form a horizontal beam casting space (10), a vertical beam casting space (10) and a vertical column casting space (9). The beam casting space (10) and the column casting space (9) are provided with the connection structure described in any one of claims 1-5.

8. A construction method for a prefabricated building as described in claim 7, characterized in that, Includes the following steps: S1. Unit board fabrication; S2. Preparation; At the construction site, the installation positions of the unit panel (1) are marked and laid out according to the design drawings and construction requirements; at the same time, debris and obstacles in the installation area are cleared to ensure that the installation area is flat and clean. S3. Installation of anchor reinforcement bars; Anchor reinforcement bars (5) are arranged along the length of the rib at the end of the outer rib plate (42) of each unit plate (1) to realize the connection between unit plates (1) along the direction of the outer rib plate (42); The rib armpit of the outer rib plate (42) is used as the bending area. The jaws of the open hydraulic clamp are aligned horizontally with both sides of the armpit, and the pressure is applied gradually and synchronously. The centering of the reinforcement bars is checked in real time; After the rib plate is plastically bent and wraps around the reinforcement bars, the pressure is released. Then, the folded edge is gently tapped with a soft hammer to make the steel plate and the reinforcement bars fit closely. S4. Correction; check the condition of the outer rib plate (42) wrapping the reinforcing bars, and use clamps to press the gaps in the local areas until they are completely fitted; S5. Wall panel unit installation; The horizontal unit panel (1), the vertical unit panel (1) and the vertical unit panel (1) after the anchoring steel bars (5) are installed are connected to form a wall panel unit (8). S6. Wall panel unit hoisting; using a special hoisting beam and adjustable slings, the lower end of the slings is directly hooked into the hoisting sleeve embedded in the wall panel unit (8) through a rotating lock, and each wall panel unit (8) is hoisted to the marked position; S7. Adjacent unit panel joints; The horizontal beam casting space (10), longitudinal beam casting space (10) and column casting space (9) formed by the docking of adjacent wall panel units (8) are perpendicular to each other. Along the rib length direction of the profiled steel sheet, the Ω-shaped sealing plate (6) is fastened across the joint to the corresponding position, so that the two flanges of the sealing plate (6) overlap the rib shoulders (43) of the two wall panel units (8) respectively, forming a continuous and closed linear sealing. S8. On-site pouring; a foldable funnel-shaped guide hood is set up at the top of the column pouring space (9), and then the pump pipe is slowly inserted along the hood opening. The concrete rises from the bottom of the column pouring space (9) in a continuous, low-impact laminar flow manner. When the concrete slurry level rises to the top of the cavity and slightly overflows, the excess concrete is immediately pumped back by a slow-speed return pump. S9. Curing and Inspection: After the concrete is poured, immediately cover the top of the column with a moisturizing film and continue to moisturize and cure for seven days. After seven days, remove the film and cover with a breathable curing blanket to continue to stand until the specified age. On the final setting day, use a rebound hammer to test the early strength and verify whether the concrete strength and density meet the design requirements.

9. The construction method for prefabricated buildings according to claim 8, characterized in that: The unit panel manufacturing steps include: designing and manufacturing a three-dimensional cage with galvanized steel wire according to the size of the unit panel (1), leaving an opening at the pouring position; fixing the detachable template and connecting plate (4) in the correct position, applying release oil to the inside of the detachable template, and pre-fixing metal brackets at the corresponding positions of the bottom and side templates of the template to fix the wire mesh (11); after fixing the wire cage and the brackets, pouring lightweight aggregate concrete and vibrating it, and after demolding, forming a unit panel (1) with wire mesh (11) and connecting plate (4).

Images