Prestressed hollow slab connecting method and assembled farm house construction method

Abstract

The present application relates to the technical field of fabricated building, especially relates to a prestressed hollow slab connecting method and a fabricated farm house construction method, aiming at solving the problem of low connecting strength and connecting efficiency of the prestressed hollow slab. The prestressed hollow slab connecting method provided by the present application uses prestressed hollow slab as floor slab and wall slab, and connects the prestressed hollow slab with steel connecting piece; the steel connecting piece is provided with at least two U-shaped grooves extending along the length direction; the prestressed hollow slab is inserted into the U-shaped grooves; and the gap between the U-shaped grooves and the prestressed hollow slab is filled with grouting material. The prestressed hollow slab connecting method provided by the present application uses steel connecting piece as connecting frame, and fixes the prestressed hollow slab by using the clamping and inserting mode, replaces the structure column and ring beam and other structures of concrete pouring, so that the prestressed hollow slab can be used as floor slab and wall slab at the same time, the connecting structure and connecting mode of the prestressed hollow slab are simplified, and the connecting difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated building, in particular to a prestressed hollow slab connecting method and a prefabricated farm house construction method. BACKGROUND

[0002] As an energy-saving composite wallboard, the prestressed hollow slab has excellent performance such as strong bearing capacity, large span, heat preservation, heat insulation, sound insulation and good ductility. In particular, the prestressed hollow slab made by the shear extrusion forming process has high degree of factory automation, larger hole rate, less cement consumption, clear corners and good visual quality. The prestressed hollow slab is mainly used in building floors and the technology is very mature. However, the prestressed hollow slab as a wallboard has not formed a scale, mainly because of the lack of prestressed hollow wallboard and beam, slab and column node connection processing, resulting in a very small application range. It is difficult to set the embedded parts for the prestressed hollow slab production line for factory automation, which makes the prestressed hollow slab have very few connection forms as a wallboard, resulting in low connection strength and connection efficiency of the prestressed hollow slab in the construction process. SUMMARY

[0003] The purpose of the present application is to provide a prestressed hollow slab connecting method and a prefabricated farm house construction method to solve the problem of low connection strength and connection efficiency of the prestressed hollow slab.

[0004] To solve the above technical problems, the technical scheme provided by the present application is as follows:

[0005] A prestressed hollow slab connecting method uses prestressed hollow slab as floor and wallboard, and connects the prestressed hollow slab with a steel connecting piece. The steel connecting piece is provided with at least two U-shaped grooves extending along the length direction. The prestressed hollow slab is inserted into the U-shaped groove. The gap between the U-shaped groove and the prestressed hollow slab is filled with grouting material.

[0006] Further, when the opening of the U-shaped groove is upward, the prestressed hollow slab is inserted into the U-shaped groove, then the concrete is filled into the through hole of the prestressed hollow slab, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key, and finally the gap between the U-shaped groove and the prestressed hollow slab is filled with grouting material.

[0007] Further, when the opening of the U-shaped groove is downward, a hole plug is put into the through hole of the prestressed hollow slab, then the concrete is poured into the upper end of the prestressed hollow slab and the through hole, then the prestressed hollow slab with poured concrete is inserted into the U-shaped groove and a cylindrical shear key is formed in the through hole of the prestressed hollow slab, and finally the gap between the U-shaped groove and the prestressed hollow slab is filled with grouting material.

[0008] Further, the U-shaped groove opening points to the horizontal direction, and a limiting plate parallel to the bottom plate of the U-shaped groove and a screw rod are arranged in the U-shaped groove; the prestressed hollow slab is inserted into the U-shaped groove and abuts against the limiting plate; the concrete is poured between the end of the prestressed hollow slab abutting against the limiting plate and the bottom plate of the U-shaped groove; one end of the screw rod is connected with the side wall of the U-shaped groove perpendicularly, and the other end penetrates through the other side wall of the U-shaped groove, and the nut is connected with the screw rod through screw threads and abuts against the other side wall of the U-shaped groove.

[0009] Further, the steel connecting piece comprises an H-shaped connecting piece, and the H-shaped connecting piece comprises two symmetrically arranged U-shaped grooves for connecting the prestressed hollow slabs arranged in a straight line.

[0010] Further, the steel connecting piece further comprises a T-shaped connecting piece; the T-shaped connecting piece is used for connecting the prestressed hollow slabs arranged vertically; the T-shaped connecting piece is made of an I-shaped steel and a channel steel, and the bottom plate of the channel steel is connected with the wing plate of the I-shaped steel to form three U-shaped grooves arranged in a T shape.

[0011] Further, the steel connecting piece further comprises a "sheet" shaped connecting piece; the "sheet" shaped connecting piece is composed of a steel piece with an h-shaped cross section and an angle steel and forms three U-shaped grooves arranged in a T shape; the opening of the "sheet" shaped connecting piece in the horizontal direction is used for connecting the prestressed hollow slabs arranged horizontally, and the other two U-shaped grooves are used for connecting the prestressed hollow slabs arranged vertically; a limiting plate parallel to the bottom plate of the U-shaped groove is arranged in the U-shaped groove corresponding to the opening of the "sheet" shaped connecting piece in the horizontal direction, the prestressed hollow slab is inserted into the U-shaped groove and abuts against the limiting plate, and the concrete is poured between the end of the prestressed hollow slab abutting against the limiting plate and the bottom plate of the U-shaped groove.

[0012] Further, the steel connecting piece further comprises a cross-shaped connecting piece, and the cross-shaped connecting piece comprises four U-shaped grooves arranged in a cross shape; the U-shaped grooves with openings pointing upward and downward are used for connecting the prestressed hollow slabs arranged vertically; the prestressed hollow slab is inserted into the U-shaped groove with the opening pointing upward, and then the prestressed hollow slab is filled with the concrete, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key, and finally the gap between the U-shaped groove and the prestressed hollow slab is filled with grouting material; the hole plug is put into the through hole of the prestressed hollow slab, and then the concrete is poured into the upper end of the prestressed hollow slab and the through hole, and then the prestressed hollow slab poured with the concrete is inserted into the U-shaped groove with the opening pointing downward and forms a cylindrical shear key in the through hole of the prestressed hollow slab, and finally the gap between the U-shaped groove and the prestressed hollow slab is filled with grouting material; the U-shaped groove with the opening pointing to the horizontal direction is used for connecting the prestressed hollow slabs arranged horizontally; a limiting plate parallel to the bottom plate of the U-shaped groove is arranged in the U-shaped groove with the opening pointing to the horizontal direction, the prestressed hollow slab is inserted into the U-shaped groove and abuts against the limiting plate, and the concrete is poured between the end of the prestressed hollow slab abutting against the limiting plate and the bottom plate of the U-shaped groove.

[0013] Further, the prestressed reinforcement is arranged through the at least two vertically arranged steel connectors and the prestressed hollow slab arranged between the steel connectors, and the two ends of the prestressed reinforcement arranged out of the steel connectors are provided with anchorage devices to lock the steel connectors and the prestressed hollow slab; the steel bands are arranged on both sides of the prestressed hollow slab, and the two ends of the steel bands are respectively connected with the steel connectors to clamp the prestressed hollow slab.

[0014] In another aspect of the present application, a prefabricated farm house construction method is provided, which adopts the prestressed hollow slab connecting method described above; the steel connectors are used to form a U-shaped frame or a rectangular frame, and the prestressed hollow slab is clamped in the U-shaped frame or the rectangular frame.

[0015] In combination with the above technical solutions, the present application can achieve the following technical effects:

[0016] The prestressed hollow slab connecting method provided by the present application uses the prestressed hollow slab as a floor slab and a wall slab, and connects the prestressed hollow slab with the steel connectors; the steel connectors are provided with at least two U-shaped grooves extending along the length direction; the prestressed hollow slab is inserted into the U-shaped grooves; and the gap between the U-shaped grooves and the prestressed hollow slab is filled with grouting material.

[0017] The prestressed hollow slab connecting method provided by the present application uses the steel connectors as the connecting frame, and fixes the prestressed hollow slab by clamping and inserting, which replaces the structural columns and ring beams formed by pouring concrete, so that the prestressed hollow slab can be used as both a floor slab and a wall slab, and the connecting structure and connecting method of the prestressed hollow slab are simplified, and the connection difficulty is reduced. During the connection, the steel connectors and the prestressed hollow slab are only needed to be positioned and the gap is only needed to be filled, which greatly reduces the work load of pouring concrete and the positioning difficulty of the prestressed hollow slab. The insertion of the prestressed hollow slab into the U-shaped grooves can reliably limit the prestressed hollow slab by the U-shaped grooves, and the reliability of the connection is improved. Through the optimization of the connecting structure and connecting method of the steel connectors and the prestressed hollow slab, the connection strength and connection efficiency of the prestressed hollow slab are significantly improved, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The structural schematic diagram of the prefabricated farm house provided by the present application is shown in the figure.

[0020] Figure 2Structure diagram of H-shaped connector;

[0021] Figure 3 Structure diagram of T-shaped connector;

[0022] Figure 4 Connection diagram of T-shaped connector;

[0023] Figure 5 Another connection diagram of T-shaped connector;

[0024] Figure 6 Front view of "sheet" shaped connector;

[0025] Figure 7 Perspective view of "sheet" shaped connector;

[0026] Figure 8 Front view of cross-shaped connector;

[0027] Figure 9 Perspective view of cross-shaped connector;

[0028] Figure 10 Connection diagram of cross-shaped connector;

[0029] Figure 11 Connection diagram of prestressed tendon;

[0030] Figure 12 Perspective connection diagram of prestressed tendon;

[0031] Figure 13 Perspective connection diagram of steel belt;

[0032] Figure 14 Structure diagram of connection frame.

[0033] Icon: 100-H-shaped connector; 200-T-shaped connector; 300- "sheet" shaped connector; 400-cross-shaped connector; 500-prestressed tendon; 600-anchor; 700-steel belt; a-U-shaped groove; 310-h-shaped steel; 320-angle steel; 330-limiting plate; 340-screw rod; 410-connection plate; 10-floor slab; 20-wallboard. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Prestressed hollow core slabs are mainly used in building floor slabs, and the technology is very mature. However, the use of prestressed hollow core slabs as wall panels has not yet reached a large scale. There is a lack of connection treatment between prestressed hollow core wall panels and beams, slabs, and columns, resulting in a very small application range. Furthermore, it is difficult to set up embedded parts in the prestressed hollow core slab production line for automated factory production. This makes the available connection methods for prestressed hollow core slabs as wall panels very limited, resulting in low connection strength and efficiency of prestressed hollow core slabs during construction.

[0038] In view of this, the present invention provides a method for connecting prestressed hollow slabs, using prestressed hollow slabs as floor slabs 10 and wall panels 20, and connecting them with steel connectors; the steel connectors are provided with at least two U-shaped grooves a extending along the length direction; the prestressed hollow slabs are inserted into the U-shaped grooves a; the gap between the U-shaped grooves a and the prestressed hollow slabs is filled with grout.

[0039] The prestressed hollow slab connection method provided by this invention uses steel connectors as the connection frame and is fixed by snap-fitting with the prestressed hollow slab, replacing concrete-cast structural columns and ring beams. This allows the prestressed hollow slab to function as both a floor slab 10 and a wall panel 20, while simplifying the connection structure and method and reducing connection difficulty. During connection, it is only necessary to position the steel connectors to the prestressed hollow slab and fill the gaps, greatly reducing the workload of concrete pouring and the difficulty of positioning the prestressed hollow slab. Furthermore, the insertion of the prestressed hollow slab into the U-shaped groove a allows the U-shaped groove a to reliably limit the prestressed hollow slab, improving the reliability of the connection. Through the optimization of the connection structure and method between the steel connectors and the prestressed hollow slab, the connection strength and efficiency of the prestressed hollow slab are significantly improved, while reducing labor intensity.

[0040] The following combination Figures 1-14 The prestressed hollow slab connection method provided in this embodiment will be described in detail:

[0041] For the U-shaped groove a, when its opening is upward, the prestressed hollow slab connecting method is as follows: the prestressed hollow slab is inserted into the U-shaped groove a, then a certain amount of concrete is filled into the through hole of the prestressed hollow slab from the upper end of the prestressed hollow slab, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key with appropriate height at the end of the prestressed hollow slab close to the U-shaped groove a, finally the gap between the U-shaped groove a and the prestressed hollow slab is filled with grouting material.

[0042] When the opening of the U-shaped groove a is downward, the prestressed hollow slab connecting method is as follows: a hole plug is put into the through hole of the prestressed hollow slab at an appropriate position, then the prestressed hollow slab is casted with concrete from the upper end of the prestressed hollow slab into the upper end and the through hole of the prestressed hollow slab, then the prestressed hollow slab casted with concrete is inserted into the U-shaped groove a and forms a cylindrical shear key in the through hole of the prestressed hollow slab, finally the gap between the U-shaped groove a and the prestressed hollow slab is filled with grouting material. The depth of the hole plug inserted into the through hole of the prestressed hollow slab determines the length of the cylindrical shear key, that is, the hole plug forms a blind hole, after the concrete is casted, the concrete enters this section of the blind hole and stays on the upper end surface of the prestressed hollow slab, then cooperates with the U-shaped groove a, finally the prestressed hollow slab is connected with the U-shaped groove a and forms a shear key extending in the vertical direction, the shear key is cylindrical, finally the gap between the U-shaped groove a and the prestressed hollow slab is filled with grouting material.

[0043] When the opening of the U-shaped groove a points to the horizontal direction, the prestressed hollow slab connecting method is as follows: when the opening of the U-shaped groove a points to the horizontal direction, a limiting plate 330 parallel to the bottom plate of the U-shaped groove a and a screw rod 340 are arranged in the U-shaped groove a; the prestressed hollow slab is inserted into the U-shaped groove a and abuts against the limiting plate 330; the concrete is casted between the end of the prestressed hollow slab abutting against the limiting plate 330 and the bottom plate of the U-shaped groove a to reliably connect the U-shaped groove a and the prestressed hollow slab; one end of the screw rod 340 is connected with the side wall of the U-shaped groove a perpendicularly, and the other end penetrates through the other side wall of the U-shaped groove a, then a nut is threadedly connected with the screw rod 340 and abuts against the other side wall of the U-shaped groove a, the pressure is applied to the other side wall of the U-shaped groove a by the nut to cooperate with the limiting plate 330 to keep the shape of the U-shaped groove a stable. That is, the limiting plate 330 can prevent the distance between the two side walls of the U-shaped groove a from becoming smaller, and the cooperation of the screw rod 340 and the nut can prevent the distance between the two side walls of the U-shaped groove a from becoming larger. Specifically, the nut is arranged on the side of the side wall of the U-shaped groove a away from the limiting plate 330. Finally, the gap between the U-shaped groove a and the prestressed hollow slab is filled with grouting material.

[0044] For the prestressed hollow slab which needs to be arranged obliquely, the opening of the U-shaped groove a can be correspondingly inclined.

[0045] In an alternative of the embodiment, the steel connecting pieces include H-shaped connecting pieces 100, T-shaped connecting pieces 200, "sheet" shaped connecting pieces 300 and cross-shaped connecting pieces 400, which are used to connect the prestressed hollow slabs.

[0046] The prestressed hollow slabs arranged horizontally are used as floor slabs 10, and the prestressed hollow slabs arranged vertically are used as wall slabs 20.

[0047] In an alternative of the embodiment, as shown in Figure 2 The H-shaped connecting piece 100 includes two symmetrically arranged U-shaped grooves a, which are used to connect the wall slabs 20 arranged in a straight line. Specifically, the H-shaped connecting piece 100 can be made of a suitable H-shaped steel or a plate material welded together. When used, the H-shaped connecting piece 100 is used to connect the wall slabs 20 arranged in a straight line, and can be applied at appropriate positions as needed to ensure the fixation of the wall slabs 20. In the embodiment, an H-shaped connecting piece 100 can be applied every 3.6 m as a constructional column to ensure the connecting strength, and it is not necessary to arrange the H-shaped connecting piece 100 on both sides of each wall slab 20.

[0048] In an alternative of the embodiment, the steel connecting pieces further include T-shaped connecting pieces 200. The T-shaped connecting pieces 200 are used to connect the prestressed hollow slabs arranged vertically, i.e. the T-shaped connecting pieces 200 are used to connect the wall slabs 20, as shown in Figure 4 The T-shaped connecting piece 200 is made of an I-beam and a channel steel, as shown in Figure 3 The bottom plate of the channel steel is connected with the wing plate of the I-beam to form three U-shaped grooves a arranged in a T shape. When used, the wall slabs 20 are inserted into the U-shaped grooves a, and then the gap between the wall slabs 20 and the U-shaped grooves a is filled with grouting material to achieve fixation, thereby achieving the rapid connection of the wall slabs 20. In the embodiment, the gap is filled with high-strength grouting material to ensure the connecting strength and reliability.

[0049] Further, the T-shaped connecting piece 200 can be used as a corner column, i.e. used to connect the corner of the wall, in which case only the wall slabs 20 are inserted into two U-shaped grooves a perpendicular to each other, as shown in Figure 5

[0050] In an alternative of the embodiment, the steel connecting pieces further include "sheet" shaped connecting pieces 300. The "sheet" shaped connecting piece 300 is composed of a steel piece with a h-shaped cross section and an angle steel 320 welded together, and forms three U-shaped grooves a arranged in a T shape, as shown in Figure 6 ​The opening of the "sheet" shape in horizontal direction is used to connect with the horizontally arranged floor 10, and the other two U-shaped grooves a are connected with the wall plate 20, and two wall plates 20 are arranged on the upper and lower sides of the "sheet" shape connecting piece 300. The opening of the "sheet" shape in horizontal direction is provided with a limiting plate 330 parallel to the bottom plate of the U-shaped groove a, and the two ends of the limiting plate 330 are connected with the side plate of the U-shaped groove a. The floor 10 is inserted into the U-shaped groove a and abuts against the limiting plate 330. The end of the floor 10 abutting against the limiting plate 330 is poured with concrete between the limiting plate 330 and the bottom plate of the U-shaped groove a to form a floor pouring zone. It should be noted that the limiting plates 330 are arranged at intervals along the length direction of the U-shaped groove a to ensure the contact of the concrete with the floor 10, thereby ensuring the connecting strength. That is, the "sheet" shape connecting piece 300 is used to connect the wall plate 20 and the floor 10.

[0051] Further, the distance between the limiting plate 330 and the bottom plate of the U-shaped groove a is 30-50 mm to ensure sufficient connecting strength.

[0052] In order to improve the strength of the "sheet" shape connecting piece 300, the "sheet" shape connecting piece further comprises a screw rod 340, as shown in Figure 6 、 Figure 7 The h-shaped steel member is an h-shaped steel 310, one end of the screw rod 340 is welded with the h-shaped steel 310, and the other end penetrates through one side of the angle steel 320. After penetrating through the angle steel 320, the screw rod 340 is locked by a high-strength nut to improve the strength of the opening of the "sheet" shape in horizontal direction. The screw rod 340 cooperates with the limiting plate 330 to provide support for the U-shaped groove a corresponding to the opening of the "sheet" shape in horizontal direction, and improve the connecting strength of the h-shaped steel 310 and the angle steel 320. The cooperation of the screw rod 340 and the nut can provide a force to reduce the opening of the U-shaped groove a, and the limiting plate 330 can provide a support force in the opposite direction.

[0053] The h-shaped steel 310 can be made by welding a plate, or can be made by welding a channel steel and a steel plate.

[0054] The "piece" character-shaped connecting piece 300 is used, and the threaded rod 340 and the limiting plate 330 are welded to the horizontally arranged plate of the h-shaped steel 310 in advance. First, the h-shaped steel 310 is connected with the lower wallboard 20, and the connection method is the same as that of the prestressed hollow slab when the U-shaped groove a is opened downward. After the connection, the wallboard pouring zone is formed between the bottom plate of the U-shaped groove a and the upper end surface of the wallboard 20. The shear key is inserted into the through hole of the wallboard 20 and connected with the wallboard pouring zone. Specifically, the shear key is cylindrical. Then, the floor slab 10 is placed on the horizontally arranged plate surface of the h-shaped steel 310 and abuts against the limiting plate 330, and then the concrete is poured on site to form the floor slab pouring zone between the bottom plate of the U-shaped groove a and the floor slab 10. After the pouring is completed, the angle steel 320 is welded with the h-shaped steel 310 to form the "piece" character-shaped connecting piece 300, and the limiting plate 330 is welded with the angle steel 320. It should be noted that the limiting plate 330 is welded with the angle steel 320. Before welding, a through hole is preformed on the angle steel 320 to facilitate the threaded rod 340 to pass through. After welding, a high-strength nut is used to threadedly connect with the threaded rod 340 to improve the integrity of the "piece" character-shaped connecting piece 300. Then, the gap between the U-shaped groove a and the floor slab 10 is filled with grouting material. Finally, the upper wallboard 20 is connected, and the connection method is the same as that of the prestressed hollow slab when the U-shaped groove a is opened upward.

[0055] In an optional solution of the embodiment, the steel connecting piece further includes a cross-shaped connecting piece 400, which includes four U-shaped grooves a arranged in a cross shape, as shown in Figure 8 、 Figure 9 As shown in Figure 10 , the U-shaped grooves a with openings upward and downward are used to connect with the wallboard 20, and the U-shaped groove a with the opening pointing to the horizontal direction is used to connect with the floor slab 10. The limiting plate 330 parallel to the bottom plate of the U-shaped groove a is arranged in the U-shaped groove a with the opening pointing to the horizontal direction, and the floor slab 10 is inserted into the U-shaped groove a and abuts against the limiting plate 330. The end of the floor slab 10 abutting against the limiting plate 330 is poured with concrete between the bottom plate of the U-shaped groove a to form the floor slab pouring zone. It should be noted that a plurality of limiting plates 330 are arranged along the length direction of the U-shaped groove a to ensure that the concrete can fully contact with the floor slab 10, thereby ensuring the connection strength.

[0056] Specifically, the distance between the limiting plate 330 and the bottom plate of the U-shaped groove a is 30-50 mm to ensure that the floor slab pouring zone has sufficient connection strength.

[0057] Similarly, to ensure the strength of the U-shaped groove a provided with the limiting plate 330, the threaded rod 340 is arranged on the cross-shaped connecting piece 400. One end of the threaded rod 340 is perpendicularly welded with one side wall of the U-shaped groove a and passes through the other side wall. After passing through, the high-strength nut is used to lock.

[0058] In an alternative of the embodiment, the cross-shaped connecting piece 400 comprises two channel steels and a connecting plate 410, the two channel steels are symmetrically arranged and the openings thereof are opposite to each other, and the connecting plate 410 is perpendicularly connected to the bottom plates of the two channel steels to form four U-shaped grooves a.

[0059] In use, the cross-shaped connecting piece 400 is first welded to the connecting plate 410 to form a precast beam, and the threaded rod 340 and the limiting plate 330 are welded to the precast beam, the through hole of the lower wall plate 20 is blocked by the blocking plug to form a blind hole with an upward opening, and the concrete is poured at the upper end of the wall plate 20 and simultaneously enters the blind hole; then the U-shaped groove a with a downward opening on the precast beam is combined with the upper end of the wall plate 20 to form a wall plate pouring zone and a shear key. The wall plate pouring zone is arranged between the upper end surface of the wall plate 20 and the bottom plate of the U-shaped groove a, and the shear key is inserted into the through hole of the wall plate 20 and connected with the wall plate pouring zone, and specifically, the shear key is cylindrical. Then the gap between the U-shaped groove a and the wall plate 20 is filled with grouting material. Then the floor slab 10 is placed on the horizontal plate of the precast beam and abuts against the limiting plate 330, that is, the floor slab 10 is placed on the side of the bottom plate of the downward opening channel steel away from the wing plate, and the concrete is poured to form a floor slab pouring zone; after pouring, the upward opening channel steel is welded to the connecting plate 410 and the limiting plate 330, and similarly, the bottom plate of the upward opening channel steel is provided with a precast through hole to facilitate the threaded rod 340 to pass through, after welding, a high-strength nut is used to threadedly connect with the threaded rod 340 to improve the integrity of the cross-shaped connecting piece 400, and then the gap between the U-shaped groove a and the floor slab 10 is filled with grouting material; finally, the upper wall plate 20 is connected, and the connection method is the same as that when the U-shaped groove a is upwardly opened.

[0060] In an alternative of the embodiment, to improve the connection strength of the prestressed hollow slab, a through hole is formed in the prestressed hollow slab arranged in a straight line, the axis of the through hole is perpendicular to the through hole of the prestressed hollow slab and passes through the center of the through hole, and then a prestressed tendon 500 is used to pass through at least two vertically arranged steel connecting pieces and the through hole of the prestressed hollow slab arranged between the steel connecting pieces, and the two ends of the prestressed tendon 500 extending out of the steel connecting pieces are provided with anchorage devices 600 to lock the steel connecting pieces and the prestressed hollow slab, as shown in Figure 11 、 Figure 12 It should be noted that the through hole needs to be precast in advance, and the corresponding steel connecting piece should also be precast with a through hole for connection.

[0061] In an optional embodiment, steel strips 700 are provided on both sides of the prestressed hollow slab, and the two ends of the steel strips 700 are respectively connected to steel connectors to clamp the prestressed hollow slab. Specifically, the steel strips 700 and the steel connectors are welded together. It should be noted that the prestressing tendons 500 and steel strips 700 are suitable for different connection situations. When the prestressing tendons 500 cannot be used, the steel strips 700 are used for connection, and the steel strips 700 can also be used as an auxiliary in conjunction with the prestressing tendons 500. Figure 4 As shown, when the wall panel 20 in the vertical direction uses prestressed tendons 500, it is necessary to open through holes on the T-shaped connector 200. At this time, the through holes interfere with the vertical plate and cannot be drilled. If the position of the prestressed tendons is deviated from the vertical plate, it will cause the wall panel 20 to be unbalanced and affect the stability of the connection.

[0062] In this embodiment, all the poured concrete is high-grade concrete to ensure the connection strength.

[0063] Based on the prestressed hollow slab connection method provided in this application, a prefabricated rural housing construction method is proposed, which adopts the aforementioned prestressed hollow slab connection method; steel connectors are used to construct a U-shaped frame or rectangular frame, and the prestressed hollow slabs are clamped into the U-shaped frame or rectangular frame, such as... Figure 14 As shown, the final result is as follows: Figure 1 The prefabricated farmhouse shown is an example. The end of the "plate"-shaped connector 300 can be inserted into the U-shaped groove a of the T-shaped connector 200 to facilitate frame construction and bolt connection between the two. Obviously, all steel connectors can be welded together.

[0064] Based on the prestressed hollow slab connection method provided in this application, a prefabricated rural house is proposed, such as... Figure 1 As shown. The prefabricated farmhouse includes steel connectors, prestressed tendons 500, anchors 600, and steel strips 700. The steel connectors include H-shaped connectors 100, T-shaped connectors 200, "plate"-shaped connectors 300, and cross-shaped connectors 400. H-shaped connectors 100 connect to the prestressed hollow slab to form a straight connection node; T-shaped connectors 200 connect to the prestressed hollow slab to form a T-shaped or L-shaped connection node; "plate"-shaped connectors 300 connect to the prestressed hollow slab to form a "plate"-shaped connection node; and cross-shaped connectors 400 connect to the prestressed hollow slab to form a cross-shaped connection node. In this embodiment, the "plate"-shaped and cross-shaped connection nodes are used to connect the wall panel 20 and the floor slab 10, while the straight, T-shaped, and L-shaped connection nodes are used for connections between the wall panels 20.

[0065] That is, the steel connecting piece is used as the construction column and the ring beam to complete the connection of the wall plate 20 and the floor 10, which reduces the pouring work, simplifies the connection between the prestressed hollow plates, improves the connection efficiency and connection strength, and reduces the labor intensity.

[0066] Further, the prestressed tendon 500 is used to strengthen the connection between the wall plates 20, and obviously, the through hole of the prestressed hollow plate can be used as the tendon hole. Figure 12 As shown in the figure, the rectangular hole can be formed on the wall plate 20 as the door and window.

[0067] In the optional scheme of the embodiment, the foundation can be made of steel or be poured. That is, the concrete strip foundation with grooves or the steel piece provided with the upward-opening U-shaped groove a. The upward-opening U-shaped groove a is arranged on the foundation to fix the first layer of wall plates 20. After the wall plates 20 are placed, the concrete is injected into the through hole of the prestressed hollow plate to fix the wall plates 20, and the shear key is formed at the end of the through hole of the prestressed hollow plate close to the foundation. Then, the high-strength grouting material is filled in the gap between the U-shaped groove a and the wall plate 20.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of connecting prestressed hollow core slabs, characterized in that The prestressed hollow slab is used as a floor slab (10) and a wall slab (20), and a steel connecting piece is used to connect the prestressed hollow slab; The steel connecting piece is provided with at least two U-shaped grooves (a) extending along the length direction; The prestressed hollow slab is inserted into the U-shaped groove (a); The gap between the U-shaped groove (a) and the prestressed hollow slab is filled with grouting material; When the opening of the U-shaped groove (a) points to the horizontal direction, a limiting plate (330) parallel to the bottom plate of the U-shaped groove (a) and a screw rod (340) are arranged in the U-shaped groove (a); The prestressed hollow slab is inserted into the U-shaped groove (a) and abuts against the limiting plate (330); The end of the prestressed hollow slab abutting against the limiting plate (330) is poured with concrete between the bottom plate of the U-shaped groove (a); One end of the screw rod (340) is connected with the side wall of the U-shaped groove (a) perpendicularly, and the other end penetrates through the other side wall of the U-shaped groove (a), and a nut is threadedly connected with the screw rod (340) and abuts against the other side wall of the U-shaped groove (a); The two ends of the limiting plate (330) are connected with the side plates of the U-shaped groove (a), and a plurality of limiting plates (330) are arranged at intervals along the length direction of the U-shaped groove (a).

2. The method of connecting prestressed hollow core slabs according to claim 1, characterized in that, When the opening of the U-shaped groove (a) points upward, the prestressed hollow slab is inserted into the U-shaped groove (a), then the through hole of the prestressed hollow slab is filled with concrete, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key, and finally the gap between the U-shaped groove (a) and the prestressed hollow slab is filled with grouting material.

3. The method of connecting prestressed hollow core slabs according to claim 1, characterized in that, When the opening of the U-shaped groove (a) points downward, a hole plug is put into the through hole of the prestressed hollow slab, then the upper end and the through hole of the prestressed hollow slab are poured with concrete, then the prestressed hollow slab poured with concrete is inserted into the U-shaped groove (a) and a cylindrical shear key is formed in the through hole of the prestressed hollow slab, and finally the gap between the U-shaped groove (a) and the prestressed hollow slab is filled with grouting material.

4. The method of connecting prestressed hollow core slabs according to claim 1, characterized in that, The steel connecting piece comprises an H-shaped connecting piece (100), and the H-shaped connecting piece (100) comprises two symmetrical U-shaped grooves (a) for connecting the prestressed hollow slabs arranged in a straight line.

5. The method for connecting prestressed hollow slab as claimed in claim 4, characterized in that, The steel connecting piece further comprises a T-shaped connecting piece (200); The T-shaped connecting piece (200) is used to connect the prestressed hollow slabs arranged vertically; The T-shaped connecting piece (200) is made of an I-beam and a channel steel, and the bottom plate of the channel steel is connected with the flange plate of the I-beam to form three U-shaped grooves (a) arranged in a T shape.

6. The method for connecting prestressed hollow slab as claimed in claim 5, characterized in that, The steel connecting piece further comprises a "sheet" shaped connecting piece (300), which is composed of a steel piece with an h-shaped cross section and an angle steel (320) and forms three U-shaped grooves (a) arranged in a T shape; The opening of the "sheet" shaped connecting piece in the horizontal direction is used to connect the prestressed hollow slabs arranged horizontally, and the other two U-shaped grooves (a) are used to connect the prestressed hollow slabs arranged vertically. The U-shaped groove (a) with the opening pointing to the horizontal direction is used for connecting with the prestressed hollow slab arranged horizontally.

7. The method for connecting prestressed hollow slab as claimed in claim 6, characterized in that, The steel connecting piece further comprises a cross-shaped connecting piece (400), which comprises four U-shaped grooves (a) arranged in a cross shape. The U-shaped groove (a) with the opening pointing upward and downward is connected with the prestressed hollow slab arranged vertically. The prestressed hollow slab is inserted into the U-shaped groove (a) with the opening pointing upward, and then the through hole of the prestressed hollow slab is filled with concrete, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key, and finally the gap between the U-shaped groove (a) and the prestressed hollow slab is filled with grouting material. The prestressed hollow slab is inserted into the U-shaped groove (a) with the opening pointing downward, and then the through hole of the prestressed hollow slab is filled with concrete, the concrete enters the through hole of the prestressed hollow slab and forms a cylindrical shear key, and finally the gap between the U-shaped groove (a) and the prestressed hollow slab is filled with grouting material. The U-shaped groove (a) with the opening pointing to the horizontal direction is used for connecting with the prestressed hollow slab arranged horizontally. The U-shaped groove (a) with the opening pointing to the horizontal direction is used for connecting with the prestressed hollow slab arranged horizontally.

8. The prestressed hollow slab connecting method according to claim 1, wherein A prestressed tendon (500) is used to pass through at least two steel connecting pieces arranged vertically and the prestressed hollow slab arranged between the steel connecting pieces, and the prestressed tendon (500) is provided with an anchor (600) at both ends thereof to lock the steel connecting pieces and the prestressed hollow slab; Steel bands (700) are arranged on both sides of the prestressed hollow slab, and both ends of the steel bands (700) are respectively connected with the steel connecting pieces so that the steel bands (700) clamp the prestressed hollow slab. 9.A method of constructing a fabricated farm house, characterized by, The prestressed hollow slab connecting method according to any one of claims 1-8 is adopted; The steel connecting piece is used to form a U-shaped frame or a rectangular frame, and the prestressed hollow slab is clamped in the U-shaped frame or the rectangular frame. The steel connecting piece is used to form a U-shaped frame or a rectangular frame, and the prestressed hollow slab is clamped in the U-shaped frame or the rectangular frame.

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