Pop-up type steel bar truss laminated slab reinforcing structure and method

Abstract

The application discloses a pop-up type steel bar truss laminated slab reinforcing structure and method, which comprises a connecting sleeve located in a prefabricated bottom plate, one end of the connecting sleeve being connected with a longitudinal stress bar in the plate and the other end of the connecting sleeve being communicated with the outside; a reinforcing sleeve which is telescopically connected in the connecting sleeve and can be retracted into the connecting sleeve or extended out of the connecting sleeve; a telescopic piece located in the connecting sleeve, one end of the telescopic piece being connected with the end of the longitudinal stress bar and the other end of the telescopic piece being connected with the reinforcing sleeve, the telescopic piece being used for retracting and extending the reinforcing sleeve into and out of the connecting sleeve; and a movable blocking device used for limiting the reinforcing sleeve in the connecting sleeve. The application aims at improving the construction problems that the longitudinal stress bar in the prefabricated bottom plate is inconvenient to extend out of the plate end during transportation or hoisting, is easy to collide and scratch to cause self damage and harm to others, and is interfered with the longitudinal bar of a beam or a wall during hoisting, placing and positioning.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, specifically relating to a pop-up steel truss composite slab reinforcement structure and method. Background Technology

[0002] In recent years, my country has vigorously developed green buildings and building materials, actively promoted prefabricated buildings, and implemented the industrialization of construction. Many regions have set requirements for the prefabrication rate of buildings during the engineering design stage, leading to the rapid development of prefabricated buildings. As an advanced floor slab type, reinforced concrete truss composite slabs are prefabricated in factories, with anchor bars inserted into beams. The negative moment reinforcement of the slab is tied according to drawings, and the composite layer concrete is poured, forming a unified whole between the prefabricated and composite layers. This allows for standardization of residential production and design, falling under the category of residential industrialization. Its support system is similar to traditional wooden formwork cast-in-place concrete structures, offering quick construction, short construction periods, high efficiency, labor savings, and low skill requirements for workers. A large number of water and electricity pipelines, junction boxes, and reserved openings can also be manufactured in the factory, making quality control easier. It has been widely used in modern residential construction. However, during installation, the longitudinal reinforcement of the prefabricated slab typically extends from the slab end and is anchored into the post-cast concrete of the supporting beams or walls, with an anchorage length of not less than 5d and passing through the support centerline. However, transporting precast foundation slabs with exposed reinforcement is difficult. During construction, the anchor bars of the precast foundation slab interfere with the beam reinforcement, and workers often need to cold-bend the anchor bars before placing them, causing fatigue damage due to repeated bending. Even with subsequent binding of the beam reinforcement, the construction operation is still difficult when extending the longitudinal reinforcement of large-span beams. Therefore, there is an urgent need to optimize the reinforcement structure of composite slabs to economically and feasiblely solve the construction difficulties of side reinforcement in precast foundation slabs. Summary of the Invention

[0003] In order to overcome the shortcomings of related technologies, this invention proposes a pop-up steel truss composite slab reinforcement structure and method, which does not require the removal of precast bottom slab reinforcement and does not interfere with beam reinforcement.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A pop-up reinforced steel truss composite slab reinforcement structure includes:

[0006] The connecting sleeve is located inside the precast base slab, with one end connected to the longitudinal reinforcing bars inside the slab and the other end connected to the outside.

[0007] The rib sleeve is telescopically connected inside the connecting sleeve; it can retract into the connecting sleeve or extend out of the connecting sleeve.

[0008] The telescopic component is located inside the connecting sleeve. One end is connected to the end of the longitudinal reinforcing bar, and the other end is connected to the protruding bar sleeve. It is used to retract the protruding bar sleeve into and extend out of the connecting sleeve.

[0009] A movable stop is used to confine the rib sleeve within the connecting sleeve;

[0010] The telescopic steel rod is inserted into the rib extension sleeve and can be pulled out to ensure the rib extension length.

[0011] The aforementioned pop-out steel truss composite slab reinforcement structure also includes a clearance opening, which is opened on the precast base plate at a position adapted to the stop device, for making way for the stop device.

[0012] The aforementioned pop-out reinforced steel truss composite slab reinforcement structure further includes a connecting ring connected to one end of the connecting sleeve near the longitudinal reinforcing bar. The longitudinal reinforcing bar is connected to the connecting sleeve via the connecting ring. A limiter is connected to one end of the telescopic steel rod near the connecting sleeve to prevent the telescopic steel rod from coming out of the reinforcement sleeve.

[0013] In the aforementioned pop-up reinforced steel truss composite slab reinforcement structure, the expansion member is a spring.

[0014] The aforementioned pop-out steel truss composite slab reinforcement structure includes a stopper comprising a handle and a limiting part. The clearance port has an insertion hole for connecting the sleeve, and the stopper is inserted into the insertion hole. The insertion hole is a frustum-shaped inverted cone, and the shape and size of the limiting part are adapted to the insertion hole.

[0015] In the above-mentioned pop-out steel truss composite slab reinforcement structure, the stop device is a spring stop device, which only compresses the spring and limits the reinforcement sleeve inside the connecting sleeve by directly compressing the spring.

[0016] In the above-mentioned pop-out steel truss composite slab reinforcement structure, the stop device is a sleeve stop device located at the end of the clearance port. It compresses the reinforcement sleeve and the spring, and limits the reinforcement sleeve inside the connecting sleeve by indirectly compressing the spring.

[0017] In the aforementioned pop-out reinforced steel truss composite slab reinforcement structure, the end of the telescopic steel rod is connected to a head for easy pulling out of the telescopic steel rod.

[0018] A method for extruding reinforcement in a pop-up steel truss composite slab includes a pop-up steel truss composite slab reinforcement structure as described in any of the above claims. By separating the telescopic steel rod from the longitudinal reinforcing bars and connecting the telescopic steel rod and the reinforcement sleeve to the sleeve, the reinforcement can be extended or retracted, which satisfies the requirement of reinforcement extrusion without interfering with the beam reinforcement, and facilitates storage and transportation.

[0019] A construction method for reinforced concrete truss composite slabs, using a pop-up reinforced concrete truss composite slab reinforcement structure as described in any one of the above claims, includes the following steps:

[0020] A connecting sleeve is pre-embedded in the precast base slab, and the connecting sleeve is firmly connected to the longitudinal reinforcing bar inside the slab by a connecting ring;

[0021] The precast base plate is designed and manufactured into a clearance opening, which is then poured and superimposed together with the subsequent cast-in-place layer.

[0022] The precast base slab is in a state without protruding reinforcement bars during factory transportation and hoisting, which facilitates transportation, hoisting and positioning. When placed, it does not conflict with the reinforcement bars of the two side beams and has ample space.

[0023] After the precast base plate is placed in place and the reinforcement bars of the two side beams are tied, the stopper is removed through the clearance opening on the precast base plate, the telescopic component in the connecting sleeve is released, the reinforcement sleeve is popped out, and the telescopic steel rod is thrown out at the same time.

[0024] The above-mentioned pop-up steel truss composite slab reinforcement structure is used for reinforcement outlays in steel truss composite slabs.

[0025] The present invention employs the above-mentioned precast base slab reinforcement structure, which has the following advantages and positive effects compared with related technologies:

[0026] 1. By connecting sleeves, springs and rib-out sleeves, the rib-out structure of the precast base slab is improved, so that the ribs of the precast base slab are retracted into the precast base slab during factory transportation and hoisting, which changes the traditional factory structure of the precast base slab.

[0027] 2. After hoisting and placement, springs are used to pop out the reinforcing bars, without canceling the reinforcing bars of the precast base plate, changing the shape of the reinforcing bars, or reducing the length of the reinforcing bars, thus avoiding fatigue damage to the reinforcing bars caused by cold bending of the reinforcing bars in traditional construction methods.

[0028] 3. Effectively reduces transportation and hoisting difficulties, solves the space interference between the precast base plate reinforcement and the supporting beam / wall reinforcement during construction, and achieves one-time hoisting and placement, thus achieving convenient construction. Attached Figure Description

[0029] To clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0030] Figure 1 This is a plan view of the precast base plate of the steel truss in the exposed state of a pop-up steel truss composite slab structure according to the present invention.

[0031] Figure 2 This is a schematic diagram of the precast bottom plate structure of a pop-out type steel truss composite slab with exposed reinforcement in the unreinforced state.

[0032] Figure 3 This is a schematic diagram of the precast bottom plate structure of the steel truss in the exposed state of the steel truss composite slab structure according to the present invention.

[0033] Figure 4This is a schematic diagram of the connection structure of the connecting sleeve, spring, and connecting sleeve of a pop-up steel truss composite slab reinforcement structure according to the present invention.

[0034] In the diagram, 1-extrusion sleeve; 2-connecting sleeve; 3-spring; 4-positioner; 5-truss; 6-precast base plate; 7-longitudinal reinforcing bar; 8-hook; 9-connecting ring; 10-end; 11-telescopic steel rod. Detailed Implementation

[0035] This invention aims to improve the construction difficulties caused by the longitudinal reinforcing bars (also known as "beard bars") in precast base slabs protruding from the slab ends during transportation or hoisting, which are inconvenient and prone to collisions and scratches that could cause damage to themselves and others; and the construction difficulties caused by their obstruction of beam or wall longitudinal reinforcement during hoisting and placement. Traditional construction methods often require installation operators to cold bend the beard bars first, which can lead to fatigue failure of the reinforcing bars.

[0036] The invention comprises a retractable reinforcing bar sleeve, a spring, a stopper, and a connecting sleeve. When applied to composite slab structures, the reinforcing bar structure is simple, the components are easy to process, and the installation is convenient and quick. The precast base slab is shipped in a state without reinforcing bars, making it convenient to transport and less prone to damage. During installation, it does not affect the space of the beam / wall reinforcement, and it is easy to hoist, place, and position. After the beam reinforcement is tied, the spring can be released by removing the stopper, allowing the reinforcing bar to extend and anchor into the beam.

[0037] A pop-up reinforced steel truss composite slab reinforcement structure, such as Figure 2 and Figure 3 It includes: a connecting sleeve 2; a telescopic rib-out sleeve 1; a spring 3; and a stopper 4.

[0038] Connecting sleeve 2 is located inside the precast base plate, with one end connected to the longitudinal reinforcing bars inside the plate and the other end connected to the outside.

[0039] The rib sleeve 1 is telescopically connected inside the connecting sleeve, and can be retracted into the connecting sleeve or extended out of the connecting sleeve.

[0040] The telescopic component is located inside the connecting sleeve. One end is connected to the end of the longitudinal reinforcing bar, and the other end is connected to the reinforcing bar sleeve 1. It is used to retract the reinforcing bar sleeve 1 into and extend it out of the connecting sleeve.

[0041] like Figure 2 The movable stopper 4 is used to confine the rib sleeve 1 within the connecting sleeve;

[0042] like Figure 3 and Figure 4A telescopic steel rod 11 is inserted into the rib-extension sleeve 1 and can be pulled out to ensure the rib extension length. During transportation and storage, the telescopic steel rod 11 retracts into the rib-extension sleeve 1 and contracts together with the sleeve into the connecting sleeve. It is pulled out only when needed, thus maintaining the extension length and facilitating storage and transportation before construction. The telescopic component is a spring.

[0043] like Figure 2 It also includes a clearance opening, which is opened on the precast base plate 6 at a position that is compatible with the resistor 4, for exposing the resistor 4.

[0044] like Figure 4 and Figure 3 It also includes a connecting ring 9, which is welded or integrally formed at one end of the connecting sleeve 2 near the longitudinal reinforcing rib 7. The longitudinal reinforcing rib 7 is welded to the connecting sleeve 2 along the outer wall near the end position through the connecting ring 9.

[0045] like Figure 2 The stopper 4 includes a handle and a limiting part. The relief opening has a connecting hole for a connecting sleeve. The stopper 4 is inserted into the connecting hole, which is a frustum-shaped cavity. The shape and size of the limiting part are adapted to the connecting hole. The limiting part can be plate-shaped or rod-shaped.

[0046] like Figure 2 The stopper 4 can be used in two ways. One is as a spring stopper 4, where only the spring 3 is compressed, directly limiting the rib-extruding sleeve 1 within the connecting sleeve. The other is as a sleeve stopper 4, located at the end of the clearance opening, simultaneously compressing both the rib-extruding sleeve 1 and the spring 3, indirectly limiting the rib-extruding sleeve 1 within the connecting sleeve by compressing the spring 3. Of course, when using a spring stopper 4, it only needs to ensure the rib-extruding sleeve 1 retracts into the connecting sleeve; it can be located at the end of the spring 3 or at other suitable positions on the spring 3.

[0047] like Figure 2 and Figure 4 The telescopic steel rod 11 has a limiting component connected to one end near the connecting sleeve 2 to prevent it from detaching from the rib-exiting sleeve 1. The end of the rib-exiting sleeve can be slightly retracted to catch the limiting component. The limiting component can be a limiting ring, a block-shaped protrusion, etc.

[0048] like Figure 2 and Figure 4Since spring 3 may fail, end cap 10 is connected to the end of the telescopic steel rod 11 to facilitate its extension. When spring 3 is functioning correctly, removing the stop 4 will cause spring 3 to eject the rib extension sleeve 1, and the telescopic steel rod 11 located inside the sleeve will be thrown out, without needing to pull end cap 10. When spring 3 fails, it cannot eject the rib extension sleeve 1, and end cap 10 can be pulled directly to remove it from the sleeve. In this case, the amount of repair work is minimal and acceptable.

[0049] Since the telescopic steel rod is only pulled out once, the diameter of the extension sleeve can be controlled so that the telescopic steel rod can rely on the friction between itself and the extension sleeve to ensure that it does not fall out when not under tension.

[0050] A method for extruding reinforcement in a pop-up steel truss composite slab includes a pop-up steel truss composite slab reinforcement structure as described in any one of the above claims. By separating the telescopic steel rod from the longitudinal reinforcing bars, the telescopic steel rod and the reinforcement sleeve can extend or retract into the connecting sleeve, which satisfies the requirement of reinforcement extrusion without interfering with the beam reinforcement, and facilitates storage and transportation.

[0051] Implementation steps of the present invention:

[0052] 1) such as Figure 1 and Figure 2 As shown, the steel truss 5, precast base slab 6, longitudinal reinforcing bars 7, and end hooks of the slab joints 8 are the basic structural components of the precast precast base slab with assembled steel truss.

[0053] 2) such as Figure 1 The reinforcing bar structure is pre-embedded in the precast base slab, such as... Figure 3 and Figure 4 As shown, the connecting sleeve is firmly connected to the longitudinal reinforcing rib 7 inside the plate by the connecting ring 9, for example, by welding.

[0054] 3) The precast base plate is designed and manufactured to form a clearance opening, such as... Figure 2 This clearance opening can be poured and overlapped together with the subsequent cast-in-place layer.

[0055] 4) The precast base slab was in a state without protruding ribs during factory transportation and hoisting, such as... Figure 2 In this state, the reinforcing bars of the precast base slab do not extend beyond the slab, facilitating transportation, hoisting, and positioning. They also do not interfere with the reinforcing bars of the side beams during placement, allowing for ample space.

[0056] 5) After the precast base plate is placed in place and the longitudinal reinforcement of the two side beams is tied, the stopper 4 is removed through the clearance opening on the precast base plate, and the spring 3 in the connecting sleeve is released to push out the telescopic steel rod 11.

[0057] 6) The reinforcing bars in the precast base slab are the same as those in the traditional precast base slab, such as... Figure 1This state does not change the shape of the exposed reinforcement, nor does it reduce the length of the exposed reinforcement. It ensures that the slab's reinforcing bars are extended and anchored into the beam and pass through the support centerline, resulting in good stress distribution.

[0058] This invention is designed for construction purposes and is implemented and adopted in the processing and production of prefabricated base slabs. It changes the finished structure of the prefabricated base slab without eliminating the reinforcing bars, changing the shape of the reinforcing bars, reducing the length of the reinforcing bars, or affecting the overall structure and load-bearing performance of the composite slab.

Claims

1. A pop-up reinforced steel truss composite slab reinforcement structure, characterized in that, include: The connecting sleeve is located inside the precast base slab, with one end connected to the longitudinal reinforcing bars inside the slab and the other end connected to the outside. The rib sleeve is telescopically connected inside the connecting sleeve; it can retract into the connecting sleeve or extend out of the connecting sleeve. The telescopic component is located inside the connecting sleeve. One end is connected to the end of the longitudinal reinforcing bar, and the other end is connected to the protruding bar sleeve. It is used to retract the protruding bar sleeve into and extend out of the connecting sleeve. A movable stop is used to confine the rib sleeve within the connecting sleeve; The telescopic steel rod is inserted into the rib-extension sleeve and can be pulled out to ensure the rib extension length. It also includes a clearance opening, which is opened on the precast base plate at a position that is compatible with the resistor, and is used to allow the resistor to make way. The telescopic component is a spring. It also includes a connecting ring, which is connected to one end of the connecting sleeve near the longitudinal reinforcing bar. The longitudinal reinforcing bar is connected to the connecting sleeve through the connecting ring. A limit member is connected to one end of the telescopic steel rod near the connecting sleeve to prevent the telescopic steel rod from coming out of the reinforcing bar sleeve. The stopper includes a handle and a limiting part. The relief port has a socket for connecting the connecting sleeve. The stopper is inserted into the socket. The socket is a frustum-shaped hole. The shape and size of the limiting part are adapted to the socket. The stopper is a spring stopper that compresses only the spring to limit the rib-extruding sleeve within the connecting sleeve by directly compressing the spring; or, the stopper is a sleeve stopper located at the end of the clearance port that compresses both the rib-extruding sleeve and the spring to limit the rib-extruding sleeve within the connecting sleeve by indirectly compressing the spring. The end connector of the telescopic steel rod is used to facilitate the extension of the telescopic steel rod.

2. A method for producing reinforcement bars in a pop-up reinforced truss composite slab, characterized in that, Using the pop-out steel truss composite slab reinforcement structure as described in claim 1, by separating the telescopic steel rod from the longitudinal reinforcing bars and connecting the telescopic steel rod and the reinforcement sleeve to the sleeve, the reinforcement can be exposed without interfering with the beam reinforcement, and is convenient for storage and transportation.

3. A construction method for reinforced concrete truss composite slabs, characterized in that, The implementation steps of using the pop-out type steel truss composite slab reinforcement structure as described in claim 1 include: The reinforcing bar structure is pre-embedded in the precast base slab, and the connecting sleeve is firmly connected to the longitudinal reinforcing bar inside the slab; The precast base plate is designed and manufactured into a clearance opening, which is then poured and superimposed together with the subsequent cast-in-place layer. The precast base slab is in a state without protruding reinforcement bars during factory transportation and hoisting, which facilitates transportation, hoisting and positioning. When placed, it does not conflict with the reinforcement bars of the two side beams and has ample space. After the precast base plate is placed in place and the reinforcement bars of the two side beams are tied, the stopper is removed through the clearance opening on the precast base plate, the telescopic component in the connecting sleeve is released, the reinforcement sleeve is popped out, and the telescopic steel rod is thrown out at the same time.

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