Prefabricated stiff beam structure and method

Abstract

The invention relates to the technical field of constructional engineering, and discloses a prefabricated stiff beam structure and method, and the prefabricated stiff beam structure comprises I-shaped steel, a first prefabricated slab, a second prefabricated slab, a flat plate, anchor bars, anchoring screws and insertion plates. After the flat plate is stressed, the flat plate transmits force through the anchor bars, the I-shaped steel is further arranged in the flat plate, the I-shaped steel transmits the force, the possibility of stress concentration is reduced, and when the stress is transmitted to the interiors of the first prefabricated plate and the second prefabricated plate, the first prefabricated plate and the second prefabricated plate are not prone to deformation. The grouting cavity between the first prefabricated slab and the second prefabricated slab is synchronously grouted during grouting, so that the first prefabricated slab and the second prefabricated slab can be connected more tightly, and the anchoring screw is connected between the first prefabricated slab and the second prefabricated slab, so that the anchoring screw can be fixed when being extruded by external force. The concrete between the first precast slab and the second precast slab is stable, so that the possibility of generating cracks can be reduced, and the bearing capacity of a building can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering, and in particular relates to a prefabricated rigid beam structure and method. Background Art

[0002] Traditional reinforced concrete beams have gradually revealed many drawbacks that are difficult to overcome in long-term engineering practice.

[0003] Under the action of vertical load, especially in high-rise buildings or heavy-load industrial buildings, the load transferred from the floor slab to the beam is large and complexly distributed. The existing simple shelving connection method only relies on a certain anchorage length of the steel bars at the bottom of the floor slab on the beam to achieve force transmission, which is difficult to ensure uniform and effective force transmission, and is prone to cause local stress concentration, resulting in premature cracks at the connection between the beam and the floor slab, weakening the integrity of the structure and affecting the bearing capacity of the building.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the technical problem that under the action of vertical load, especially in high-rise buildings or heavy-load industrial buildings, the load transferred from the floor slab to the beam is large and the distribution is complex. The existing simple shelving connection method only relies on a certain anchoring length of the steel bars at the bottom of the floor slab on the beam to achieve force transmission, which is difficult to ensure uniform and effective force transmission, and is prone to cause local stress concentration, resulting in premature cracks at the connection between the beam and the floor slab, weakening the integrity of the structure and affecting the bearing capacity of the building. The basic concept of the technical solution adopted by the present invention is: A prefabricated rigid beam structure comprises an I-beam, a first prefabricated plate, a second prefabricated plate, a flat plate, anchor bars, anchor screws and a plug plate.

[0006] The first prefabricated plate is L-shaped, the bottom of the I-beam is overlapped on the first prefabricated plate, and the height of the I-beam is higher than the height of the first prefabricated plate; The second prefabricated panel is in the shape of a letter "U", the side wall of the first prefabricated panel is closely fitted with the side wall of the second prefabricated panel, the cavity surrounded by the first prefabricated panel and the second prefabricated panel is in the shape of a U, and grout is poured inside the cavity, and the height of the second prefabricated panel is higher than that of the first prefabricated panel; The flat plate is placed above the first precast plate and the second precast plate, and the first precast plate and the second precast plate are connected to the flat plate by casting, and the inner cavity of the flat plate is cast together with the upper surface of the I-beam; Anchor bars are integrally cast inside the first prefabricated plate and the second prefabricated plate, and the other ends of the anchor bars are cast in the flat plate; The anchoring screw rod horizontally passes through the first prefabricated plate and the second prefabricated plate, and an anchoring nut is installed at the end of the anchoring screw rod; A grouting cavity is provided at the bottom of the first prefabricated plate, the plug plate is movably plugged into the grouting cavity, a connecting plate is installed at one end of the plug plate, and the connecting plate is in contact with the surface of the anchor nut, a synchronous plate is installed at the other end of the plug plate, a rocker arm is rotatably installed on the synchronous plate, a sealing block is installed at the end of the rocker arm, the sealing block is slidably arranged on the inlet opened on the surface of the first prefabricated plate, and the inlet and the grouting cavity are communicated with each other, a slide plate is installed on the side wall of the sealing block, a card block is installed on the slide plate, and the card block corresponds to the card groove opened on the side wall of the second prefabricated plate.

[0007] As a preferred embodiment of the present invention, a through hole is provided on the surface of the I-beam, and the through hole is used to connect the chambers on both sides of the I-beam. A guide groove is provided at the bottom of the first prefabricated plate, and the size of the guide groove is adapted to the size of the bottom of the I-beam, and the I-beam is overlapped on the guide groove, and the I-beam is made of Q355B steel.

[0008] As a preferred embodiment of the present invention, the upper surfaces of the first precast panel and the second precast panel are flush with each other, and a liquid injection port is provided on the first precast panel. The liquid injection port is connected to the cavity surrounded by the first precast panel and the second precast panel, and the first precast panel and the second precast panel are both precast from concrete.

[0009] As a preferred embodiment of the present invention, the bottom of the second prefabricated board is lower than the bottom of the first prefabricated board, a drip line is provided at the bottom of the second prefabricated board, and the relative surfaces of the first prefabricated board and the second prefabricated board are bonded to each other.

[0010] As a preferred embodiment of the present invention, a bending head is arranged on the top of the anchor bar, the bending head is cast in the flat plate, and binding wires are installed between adjacent anchor bars.

[0011] As a preferred embodiment of the present invention, a sliding sleeve is provided on the anchor screw for sliding connection, the sliding sleeve is placed between the anchor nut and the first prefabricated plate, the sliding sleeve and the connecting plate are connected to each other, an inner groove is provided on the back side of the first prefabricated plate, and the sizes of the inner groove, the sliding sleeve and the connecting plate are matched with each other.

[0012] As a preferred embodiment of the present invention, an insertion rod is installed at the end of the insertion plate located inside the grouting cavity, the end of the insertion rod corresponds horizontally to the insertion hole opened on the surface of the second prefabricated plate, the size of the insertion rod is adapted to the size of the insertion hole, and the surface of the insertion hole is chamfered.

[0013] As a preferred embodiment of the present invention, a fixed block is installed on the grouting chamber, a tension spring is installed on the fixed block, the other end of the tension spring is installed on the side wall of the synchronization plate, and the tension direction of the tension spring and the moving direction of the plug plate are both in the same straight line.

[0014] As a preferred embodiment of the present invention, the rocker arm is in an inclined state, with the end of the rocker arm close to the second prefabricated plate at a height higher than the other end, a limit rod is movably inserted and inserted inside the sealing block, one end of the limit rod is fixedly installed on the side wall of the grouting cavity, a slide groove is provided on the side wall of the second prefabricated plate, the card groove is provided on the end face of the slide groove, and the slide plate is slidably arranged on the slide groove.

[0015] As a preferred embodiment of the present invention, the construction method of the prefabricated rigid beam structure comprises the following steps: Step 1: prepare the first precast plate and the second precast plate, cast one end of the anchor bar on the surface of the first precast plate and the second precast plate, and expose the other end of the anchor bar to the outside; Step 2: Flat-join the first prefabricated panel and the second prefabricated panel, place an I-beam in the chamber surrounded by the first prefabricated panel and the second prefabricated panel, insert an anchoring screw between the first prefabricated panel and the second prefabricated panel, and perform a locking operation by rotating an anchoring nut on the anchoring screw; Step 3: During the rotation of the anchor nut, the connecting plate is squeezed to move, the connecting plate drives the plug plate to move, and the synchronous plate on the plug plate drives the sealing block to move toward the center through the rocker arm, so that the card block on the sealing block is finally plugged into the card slot of the second prefabricated plate, and finally the first prefabricated plate and the second prefabricated plate are tightly connected, and after the sealing block moves, the sealing block slides out from the inlet of the grouting cavity and opens the inlet; Step 4: barrier plates are arranged at both ends of the space enclosed by the first prefabricated plate and the second prefabricated plate, and then grouting is performed into the internal cavity, wherein a part of the slurry will flow along the inlet to the grouting cavity, so that the first prefabricated plate and the second prefabricated plate are connected together, and the other part of the slurry will fill the cavity enclosed by the first prefabricated plate and the second prefabricated plate. After the slurry is cooled and solidified, the barrier plates are removed, and at this time, the first prefabricated plate, the second prefabricated plate and the I-beam are tightly connected together; Step 5: Install the casting mold on the structure cast in step 4, and inject grout into the inside. After the grouting is completed, a flat plate is formed. At this time, the flat plate will be connected to the I-beam, the first precast plate, the second precast plate and the anchor bar to form a whole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the flat plate of the present invention is subjected to pressure, the flat plate at this time not only transmits force through the anchor bars, but also has an I-beam arranged inside the flat plate, which also transmits force, thereby reducing the possibility of stress concentration, and when the stress is transmitted to the inside of the first precast plate and the second precast plate, the grouting cavity between the first precast plate and the second precast plate is synchronously grouted during grouting, so the first precast plate and the second precast plate are connected more closely, and an anchoring screw is connected between the first precast plate and the second precast plate, so when subjected to external force compression, the concrete between the first precast plate and the second precast plate is stable, which can reduce the possibility of cracks, so the overall bearing capacity of the building can be improved.

[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture: Figure 1 A schematic diagram of a prefabricated stiff beam structure Figure 1 ; Figure 2 A schematic diagram of a prefabricated stiff beam structure Figure 2 ; Figure 3 A cross-sectional view of a flat plate structure of a prefabricated stiff beam; Figure 4 It is a schematic diagram of the structure after casting of a prefabricated rigid beam structure; Figure 5 This is a structural diagram of the anchor bar installation position of a prefabricated stiff beam structure; Figure 6 This is a structural diagram of anchor bar connection for a prefabricated rigid beam structure; Figure 7 A three-dimensional diagram of a second precast panel constructed of a precast stiff beam; Figure 8 A cross-sectional view of the connection between a first prefabricated panel and a second prefabricated panel of a prefabricated stiff beam structure.

[0019] In the figure: 1, I-beam; 11, through hole; 2, first precast plate; 21, guide groove; 211, injection port; 3, second precast plate; 31, drip line; 4, flat plate; 5, anchor bar; 51, bending head; 52, binding wire; 6, anchor screw; 61, anchor nut; 7, plug plate; 71, connecting plate; 711, sliding sleeve; 712, inner groove; 72, plug rod; 721, plug hole; 73, synchronous plate; 731, fixing block; 732, tension spring; 74, sealing block; 741, limiting rod; 742, rocker arm; 743, slide plate; 744, clamping block; 745, clamping groove; 746, slide groove; 75, grouting cavity; 751, inlet. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Embodiment 1, as Figures 1 to 8 As shown, a prefabricated rigid beam structure includes an I-beam 1, a first prefabricated plate 2, a second prefabricated plate 3, a flat plate 4, anchor bars 5, anchor screws 6 and a plug plate 7.

[0022] The first precast plate 2 is L-shaped, the bottom of the I-beam 1 overlaps the first precast plate 2, and the height of the I-beam 1 is higher than the height of the first precast plate 2; the second precast plate 3 is I-shaped, the side wall of the first precast plate 2 is tightly fitted with the side wall of the second precast plate 3, the cavity surrounded by the first precast plate 2 and the second precast plate 3 is U-shaped, and grouting is poured inside the cavity, and the height of the second precast plate 3 is higher than the height of the first precast plate; the flat plate 4 is placed above the first precast plate 2 and the second precast plate 3, and the first precast plate 2 and the second precast plate 3 are cast and connected with the flat plate 4, and the inner cavity of the flat plate 4 is cast together with the upper surface of the I-beam 1; the first precast plate 2 and the second precast plate 3 are integrally cast with anchor bars 5, and the other end of the anchor bars 5 is cast in the flat plate 4; the anchor screw 6 horizontally passes through the first precast plate 2 and the second precast plate 3, and the end of the anchor screw 6 is installed with an anchor nut 61; A grouting cavity 75 is provided at the bottom of the first precast plate 2, and the plug plate 7 is movably plugged into the grouting cavity 75, and a connecting plate 71 is installed at one end of the plug plate 7, and the connecting plate 71 is in contact with the surface of the anchor nut 61, and a synchronous plate 73 is installed at the other end of the plug plate 7, and a rocker arm 742 is rotatably installed on the synchronous plate 73, and a sealing block 74 is installed at the end of the rocker arm 742, and the sealing block 74 is slidably arranged on an inlet 751 provided on the surface of the first precast plate 2, and the inlet 751 is communicated with the grouting cavity 75, and a slide plate 743 is installed on the side wall of the sealing block 74, and a clamping block 744 is installed on the slide plate 743, and the clamping block 744 corresponds to the clamping groove 745 provided on the side wall of the second precast plate 3.

[0023] After the flat plate 4 of the present invention is subjected to pressure, the flat plate 4 at this time not only transmits force through the anchor bars 5, but also has an I-beam 1 inside the flat plate. The I-beam 1 at this time also transmits force, thereby reducing the possibility of stress concentration, and when the stress is transmitted to the inside of the first precast panel 2 and the second precast panel 3, the grouting cavity 75 between the first precast panel 2 and the second precast panel 3 is synchronously grouted during grouting, so the first precast panel 2 and the second precast panel 3 will be connected more closely, and the first precast panel 2 and the second precast panel 3 are connected with an anchor screw 6, so when subjected to external force compression, the concrete between the first precast panel 2 and the second precast panel 3 is stable, which can reduce the possibility of cracks, so the overall bearing capacity of the building can be improved.

[0024] like Figures 1 to 8 As shown, in a specific embodiment, a through hole 11 is provided on the surface of the I-beam 1, and the through hole 11 is used to connect the chambers on both sides of the I-beam 1. The through hole 11 facilitates the flow of grouting liquid. A guide groove 21 is provided at the bottom of the first prefabricated plate 2. The size of the guide groove 21 is adapted to the size of the bottom of the I-beam 1, and the I-beam 1 is overlapped on the guide groove 21. The guide groove 21 facilitates the installation of the I-beam 1. The I-beam is made of Q355B steel, and the material of the I-beam 1 ensures that it has sufficient structural strength.

[0025] like Figures 1 to 8 As shown, further, the upper surfaces of the first precast panel 2 and the second precast panel 3 are flush with each other, and a liquid injection port 211 is opened on the first precast panel 2. The liquid injection port 211 is interconnected with the cavity surrounded by the first precast panel 2 and the second precast panel 3. The first precast panel 2 and the second precast panel 3 are both precast with concrete, and the liquid injection port 211 is used to facilitate grouting into the first precast panel 2 and the second precast panel 3.

[0026] Embodiment 2, based on embodiment 1 and different from this embodiment, is as follows: Figures 1 to 8 As shown, the bottom of the second prefabricated panel 3 is lower than the bottom of the first prefabricated panel 2, and a drip line 31 is arranged at the bottom of the second prefabricated panel 3, wherein the drip line prevents rainwater and other water flows from entering the interior of the building, and protects the wall from erosion and damage, and the relative surfaces of the first prefabricated panel 2 and the second prefabricated panel 3 are bonded to each other, which serves the purpose of preliminary fixation.

[0027] like Figures 1 to 8 As shown, in a specific embodiment, a bending head 51 is provided on the top of the anchor bar 5, and the bending head 51 can increase the connection area and improve the structural strength of the connection. The bending head 51 is cast in the flat plate 4, and binding wires 52 are installed between adjacent anchor bars 5. The binding wires 52 facilitate controlling the distance between the anchor bars 5, so that the connection has a higher structural strength.

[0028] like Figures 1 to 8As shown, further, a sliding sleeve 711 is provided on the anchor screw 6 for sliding connection, the sliding sleeve 711 is placed between the anchor nut 61 and the first prefabricated plate 2, the sliding sleeve 711 and the connecting plate 71 are connected to each other, and an inner groove 712 is provided on the back of the first prefabricated plate 2, and the sizes of the inner groove 712, the sliding sleeve 711 and the connecting plate 71 are mutually adapted. During the rotation of the anchor nut 61, the anchor nut 61 can squeeze the sliding sleeve 711, and the sliding sleeve 711 moves along the anchor screw 6 at this time, and the sliding sleeve 711 drives the connecting plate 71 to move, and finally the connecting plate 71 can be embedded in the inner groove 712, reducing the occupied space.

[0029] Embodiment 3, based on embodiment 2 and different from this embodiment: Figures 1 to 8 As shown, a plug rod 72 is installed at the end of the plug plate 7 located inside the grouting cavity 75, and the end of the plug rod 72 corresponds horizontally to the plug hole 721 opened on the surface of the second prefabricated plate 3. The size of the plug rod 72 is adapted to the size of the plug hole 721, and the surface of the plug hole 721 is chamfered. When the connecting plate 71 moves, the connecting plate 71 can drive the plug plate 7 to move, and the plug rod 72 at the end of the plug plate 7 can be inserted into the plug hole 721, so that the first prefabricated plate 2 and the second prefabricated plate 3 are preliminarily connected together.

[0030] like Figures 1 to 8 As shown, in a specific embodiment, a fixed block 731 is installed on the grouting cavity 75, and a tension spring 732 is installed on the fixed block 731. The other end of the tension spring 732 is installed on the side wall of the synchronization plate 73, and the tension direction of the tension spring 732 and the moving direction of the plug plate 7 are both in the same straight line. The rocker arm 742 is in an inclined state, and the end of the rocker arm 742 close to the second prefabricated plate 3 is at the same height as the other end. A limit rod 741 is provided inside the sealing block 74 for movement through insertion. One end of the limit rod 741 is fixedly installed on the side wall of the grouting cavity 75. A slide groove 746 is provided on the side wall of the second prefabricated plate 3. The card slot 745 is provided on the end face of the slide groove 746. The slide plate 743 is slidably provided on the slide groove 746. When the plug plate 7 moves, the plug plate 7 can drive the synchronous plate 73 to slide, and the length of the synchronous plate 73 from the fixed block 731 becomes longer. At this time, the tension spring 732 is stretched, and the initial position of the synchronous plate 73 is limited by the tension spring 732. When the synchronous plate 73 slides, the rocker arm 742 on the synchronous plate 73 drives the sealing block 74 to move toward the center. At this time, the sealing block 74 can move downward along the limiting rod 741, and finally the slide plate 743 on the side wall of the sealing block 74 slides on the slide groove 746, and the card block 744 on the slide plate 743 can be inserted into the card groove 745, and finally the fixing operation of the first prefabricated plate 2 and the second prefabricated plate 3 is completed.

[0031] The present invention also discloses a construction method of a prefabricated rigid beam structure, the steps of which are as follows: Step 1: prepare the first precast plate 2 and the second precast plate 3, cast one end of the anchor bar 5 on the surface of the first precast plate 2 and the second precast plate 3, and expose the other end of the anchor bar 5 to the outside; Step 2: The first prefabricated panel 2 and the second prefabricated panel 3 are flatly connected, and the I-beam 1 is placed in the chamber surrounded by the first prefabricated panel 2 and the second prefabricated panel 3, and the anchor screw 6 is inserted between the first prefabricated panel 2 and the second prefabricated panel 3, and the anchor nut 61 on the anchor screw 6 is rotated to perform a locking operation; Step 3: During the rotation of the anchor nut 61, the connecting plate 71 is squeezed to move, and the connecting plate 71 drives the plug plate 7 to move. The synchronous plate 73 on the plug plate 7 drives the sealing block 74 to move toward the center through the rocker arm 742, and finally the clamping block 744 on the sealing block 74 is plugged into the clamping groove 745 of the second prefabricated plate 3, and finally the first prefabricated plate 2 and the second prefabricated plate 3 are tightly connected. After the sealing block 74 moves, the sealing block 74 slides out from the inlet 751 of the grouting cavity 75, and the inlet 751 is opened; Step 4: barrier plates are provided at both ends of the space enclosed by the first precast panel 2 and the second precast panel 3, and then grouting is performed into the internal chamber, wherein a portion of the slurry will flow along the inlet 751 to the grouting chamber 75, so that the first precast panel 2 and the second precast panel 3 are connected together, and another portion of the slurry will fill the chamber enclosed by the first precast panel 2 and the second precast panel 3. After the slurry is cooled and solidified, the barrier plates are removed, and at this time, the first precast panel 2, the second precast panel 3 and the I-beam 1 are tightly connected together; Step 5: Install the casting mold on the structure cast in step 4, and inject grout into the inside. After the grouting is completed, a flat plate 4 is formed. At this time, the flat plate 4 will be connected to the I-beam 1, the first precast plate 2, the second precast plate 3 and the anchor bar 5 to form a whole.

[0032] The implementation principle of a prefabricated stiff beam structure and method of the present invention is as follows: The operator first needs to prepare the first precast panel 2 and the second precast panel 3, cast one end of the anchor bar 5 on the surface of the first precast panel 2 and the second precast panel 3, and expose the other end of the anchor bar 5 on the outside, then the operator flatly connects the first precast panel 2 and the second precast panel 3, and places the I-beam 1 in the chamber surrounded by the first precast panel 2 and the second precast panel 3, and inserts the anchor screw 6 between the first precast panel 2 and the second precast panel 3, and performs a locking operation by turning the anchor nut 61 on the anchor screw 6, so that the first precast panel 2 and the second precast panel 3 can be tightly fitted together.

[0033] During the rotation of the anchor nut 61, the anchor nut 61 can squeeze the sleeve 711, and the sleeve 711 moves along the anchor screw 6 at this time. The sleeve 711 drives the connecting plate 71 to move, and finally the connecting plate 71 can be embedded in the inner groove 712 to reduce the occupied space. When the connecting plate 71 moves, the connecting plate 71 can drive the plug plate 7 to move, and the plug rod 72 at the end of the plug plate 7 can be inserted into the socket 721, so that the first prefabricated panel 2 and the second prefabricated panel 3 are initially connected together.

[0034] When the plug plate 7 moves, the plug plate 7 can drive the synchronous plate 73 to slide, and the length of the synchronous plate 73 from the fixed block 731 becomes longer. At this time, the tension spring 732 is stretched, and the initial position of the synchronous plate 73 is limited by the tension spring 732. When the synchronous plate 73 slides, the rocker arm 742 on the synchronous plate 73 drives the sealing block 74 to move toward the center. At this time, the sealing block 74 can move downward along the limiting rod 741, and finally the slide plate 743 of the side wall of the sealing block 74 slides on the slide groove 746, and the block 744 on the slide plate 743 can be inserted into the slot 745, finally completing the fixing operation of the first prefabricated plate 2 and the second prefabricated plate 3, and after the sealing block 74 moves, the sealing block 74 slides out from the inlet 751 of the grouting chamber 75, and at this time, the internal chamber of the grouting chamber 75 and the chamber formed by the first prefabricated plate 2 and the second prefabricated plate 3 are connected to each other.

[0035] Next, the operator needs to install baffles (not shown in the figure) at both ends of the space enclosed by the first precast panel 2 and the second precast panel 3, and then perform grouting operations into the internal chamber, wherein a portion of the slurry will flow along the inlet 751 to the grouting chamber 75, so that the structures such as the plug plate 7 and the block 744 connected inside the first precast panel 2 and the second precast panel 3 are cast together. At this time, the plug plate 7 is equivalent to a reinforcing rib, which ensures that the first precast panel 2 and the second precast panel 3 are stably connected together. Under the condition of later stress, the concrete wrapped around the I-beam 1 in the first precast panel 2 and the second precast panel 3 is not easy to crack, thereby improving the bearing capacity, and the other portion of the slurry will fill the chamber enclosed by the first precast panel 2 and the second precast panel 3, and finally the first precast panel 2, the second precast panel 3 and the I-beam 1 are tightly connected together to form a whole. When the slurry cools and solidifies, the baffle is removed.

[0036] Finally, the operator installs the casting mold on the cast structure and injects grout into the interior. After the injection, a flat plate 4 is formed. At this time, the flat plate 4 is connected to the I-beam 1, the first precast plate 2, the second precast plate 3 and the anchor bar 5 to form a whole. After the flat plate 4 is subjected to pressure, the flat plate 4 at this time not only transmits force through the anchor bar 5, but also transmits force because the I-beam 1 is also arranged inside the flat plate 4, thereby reducing the possibility of stress concentration. The force transmitted by the I-beam 1 will be transmitted to the concrete in the chamber surrounded by the first precast plate 2 and the second precast plate 3, wherein the first precast plate 2 and the second precast plate 3 can squeeze and fix the above concrete, thereby reducing the possibility of cracking and improving the overall bearing capacity of the beam.

Claims

1. A prefabricated stiff beam structure, characterized in that: include: I-beam (1); A first prefabricated plate (2), the first prefabricated plate (2) being L-shaped, and the bottom of the I-beam (1) is overlapped on the first prefabricated plate (2); The second prefabricated plate (3) is in the shape of a letter "I", the side wall of the first prefabricated plate (2) is tightly fitted with the side wall of the second prefabricated plate (3), the cavity enclosed by the first prefabricated plate (2) and the second prefabricated plate (3) is in the shape of a U, and grout is poured inside the cavity; An anchoring screw (6), the anchoring screw (6) horizontally passing through the first prefabricated plate (2) and the second prefabricated plate (3), and an anchoring nut (61) is installed at the end of the anchoring screw (6); A plug plate (7), a grouting cavity (75) is provided at the bottom of the first prefabricated plate (2), the plug plate (7) is movably plugged into the grouting cavity (75), a connecting plate (71) is installed at one end of the plug plate (7), and the connecting plate (71) is in contact with the surface of the anchor nut (61), a synchronous plate (73) is installed at the other end of the plug plate (7), a rocker arm (742) is rotatably installed on the synchronous plate (73), a sealing block (74) is installed at the end of the rocker arm (742), the sealing block (74) is slidably arranged on an inlet (751) provided on the surface of the first prefabricated plate (2), and the inlet (751) and the grouting cavity (75) are communicated with each other, a sliding plate (743) is installed on the side wall of the sealing block (74), a clamping block (744) is installed on the sliding plate (743), and the clamping block (744) corresponds to a clamping groove (745) provided on the side wall of the second prefabricated plate (3).

2. A prefabricated stiff beam structure according to claim 1, characterized in that: The height of the I-beam (1) is higher than the height of the first prefabricated plate (2); a through hole (11) is provided on the surface of the I-beam (1), the through hole (11) is used to connect the chambers located on both sides of the I-beam (1); a guide groove (21) is provided on the bottom of the first prefabricated plate (2); the size of the guide groove (21) is adapted to the size of the bottom of the I-beam (1), and the I-beam (1) is overlapped on the guide groove (21); the I-beam is made of Q355B steel.

3. The prefabricated stiff beam structure according to claim 1, characterized in that: The upper surfaces of the first precast plate (2) and the second precast plate (3) are flush with each other, a liquid injection port (211) is provided on the first precast plate (2), and the liquid injection port (211) is communicated with a cavity surrounded by the first precast plate (2) and the second precast plate (3), the first precast plate (2) and the second precast plate (3) are both precast from concrete, and the height of the second precast plate (3) is higher than that of the first precast plate (2).

4. The prefabricated stiff beam structure according to claim 1, characterized in that: The bottom of the second prefabricated plate (3) is lower than the bottom of the first prefabricated plate (2), a drip line (31) is provided at the bottom of the second prefabricated plate (3), and the opposing surfaces of the first prefabricated plate (2) and the second prefabricated plate (3) are bonded to each other.

5. The prefabricated stiff beam structure according to claim 1, characterized in that: It also includes a flat plate (4), which is placed above the first precast plate (2) and the second precast plate (3), and the first precast plate (2) and the second precast plate (3) are cast together with the flat plate (4), and the inner cavity of the flat plate (4) and the upper surface of the I-beam (1) are cast together; and anchor bars (5), the first precast plate (2) and the second precast plate (3) are integrally cast with anchor bars (5), and the other end of the anchor bars (5) is cast in the flat plate (4); a bending head (51) is provided at the top of the anchor bar (5), and the bending head (51) is cast in the flat plate (4), and a binding wire (52) is installed between adjacent anchor bars (5).

6. The prefabricated stiff beam structure according to claim 1, characterized in that: A sliding sleeve (711) is slidably sleeved on the anchor screw (6); the sliding sleeve (711) is disposed between the anchor nut (61) and the first prefabricated plate (2); the sliding sleeve (711) and the connecting plate (71) are connected to each other; an inner groove (712) is provided on the back of the first prefabricated plate (2); the inner groove (712) and the sliding sleeve (711) and the connecting plate (71) are mutually adapted in size.

7. The prefabricated stiff beam structure according to claim 1, characterized in that: An insertion rod (72) is installed at the end of the insertion plate (7) located inside the grouting cavity (75), the end of the insertion rod (72) corresponds horizontally to the insertion hole (721) opened on the surface of the second prefabricated plate (3), the size of the insertion rod (72) matches the size of the insertion hole (721), and the surface of the insertion hole (721) is chamfered.

8. The prefabricated stiff beam structure according to claim 1, characterized in that: A fixing block (731) is mounted on the grouting cavity (75), a tension spring (732) is mounted on the fixing block (731), the other end of the tension spring (732) is mounted on the side wall of the synchronization plate (73), and the tension direction of the tension spring (732) and the moving direction of the plug plate (7) are both on the same straight line.

9. The prefabricated stiff beam structure according to claim 1, characterized in that: The rocker arm (742) is in an inclined state, and the end of the rocker arm (742) close to the second prefabricated plate (3) is higher than the other end. A limit rod (741) is movably inserted and inserted into the sealing block (74). One end of the limit rod (741) is fixedly mounted on the side wall of the grouting cavity (75). A slide groove (746) is provided on the side wall of the second prefabricated plate (3). The clamping groove (745) is provided on the end surface of the slide groove (746). The slide plate (743) is slidably arranged on the slide groove (746).

10. A construction method for a prefabricated rigid beam structure, characterized in that: Applied to a prefabricated rigid beam structure as claimed in any one of claims 1 to 9, the construction method of the prefabricated rigid beam structure comprises the following steps: Step 1: preparing a first prefabricated plate (2) and a second prefabricated plate (3), casting one end of an anchor bar (5) on the surface of the first prefabricated plate (2) and the second prefabricated plate (3), and exposing the other end of the anchor bar (5) on the outside; Step 2: The first prefabricated plate (2) and the second prefabricated plate (3) are flatly connected, and an I-beam (1) is placed in the chamber surrounded by the first prefabricated plate (2) and the second prefabricated plate (3), and an anchoring screw (6) is inserted between the first prefabricated plate (2) and the second prefabricated plate (3), and a locking operation is performed by rotating an anchoring nut (61) on the anchoring screw (6); Step 3: During the rotation of the anchor nut (61), the connecting plate (71) is squeezed to move, the connecting plate (71) drives the plug plate (7) to move, and the synchronous plate (73) on the plug plate (7) drives the sealing block (74) to move toward the center through the rocker arm (742), so that the clamping block (744) on the sealing block (74) is finally inserted into the clamping groove (745) of the second prefabricated plate (3), and finally the first prefabricated plate (2) and the second prefabricated plate (3) are tightly connected, and after the sealing block (74) moves, the sealing block (74) slides out from the inlet (751) of the grouting cavity (75), and the inlet (751) is opened; Step 4: barrier plates are arranged at both ends of the space enclosed by the first prefabricated plate (2) and the second prefabricated plate (3), and then grouting is performed into the internal cavity, wherein a portion of the slurry flows along the inlet (751) to the grouting cavity (75), so that the first prefabricated plate (2) and the second prefabricated plate (3) are connected together, and another portion of the slurry fills the cavity enclosed by the first prefabricated plate (2) and the second prefabricated plate (3). After the slurry is cooled and solidified, the barrier plates are removed, and at this time, the first prefabricated plate (2), the second prefabricated plate (3) and the I-beam (1) are tightly connected together; Step 5: Install a casting mold on the structure cast in step 4, and inject grout into the interior. After the injection, a flat plate (4) is formed. At this time, the flat plate (4) is connected to the I-beam (1), the first precast plate (2), the second precast plate (3) and the anchor bar (5) to form a whole.

Images