A quickly assembled composite floor assembly

Abstract

This application relates to a rapidly assembled composite floor slab structure, belonging to the field of prefabricated building technology. It includes a precast thin slab and a reinforcing cage connected to the top surface of the precast thin slab. The top surface of the precast thin slab has multiple connecting grooves, the diameter of which decreases from the inside to the outside. Connecting components corresponding to the connecting grooves are provided between the precast thin slab and the reinforcing cage. Each connecting component includes a connecting column fixed to the reinforcing cage and multiple barbs rotatably connected to the connecting column. The sidewall of the connecting column has grouting ports corresponding to each column. A grouting channel communicating with the outside and the grouting ports is also provided inside the connecting column. The multiple barbs are spaced apart axially around the connecting column, and each barb rotates about a horizontal axis. This application improves the shear resistance of the composite surface.

Description

Technical Field

[0001] This application relates to the technical field of prefabricated buildings, and in particular to a rapidly assembled composite floor slab structure. Background Technology

[0002] Currently, composite floor slab structures are widely used in prefabricated concrete buildings. A typical composite floor slab consists of a bottom precast concrete thin slab (i.e., a precast base slab) and an upper cast-in-place concrete composite layer.

[0003] In existing construction processes, the upper layer of reinforcing cages typically uses ordinary hot-rolled ribbed steel bars. Based on the design drawings, the bars are positioned, leveled, and tied on the top surface of the precast base slab. Subsequently, the composite layer concrete is poured, allowing the upper and lower structures to form a whole through the bonding effect of the composite surface.

[0004] To achieve the positioning and support of the upper reinforcing cage, the main reliance is on the upper chord of the truss reinforcement embedded in the top surface of the precast base slab as support points. After the upper reinforcing cage is placed on it, it is secured with a large number of ties using wire. However, the above-mentioned "flexible positioning" method results in the inability to form a reliable shear force transfer path between the upper and lower reinforcing meshes. During the subsequent concrete pouring and vibration process, under the influence of dynamic construction loads such as the impact of the pump pipe, the upper reinforcing cage, which is only tied with wire, is prone to displacement or local warping. Moreover, the ties remain loose until the concrete initially sets, making it difficult to guarantee the shear resistance of the composite surface. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a rapidly assembled composite floor slab structure.

[0006] This application provides a quick-assembly composite floor slab structure, which adopts the following technical solution: it includes a precast thin slab and a steel cage connected to the top surface of the precast thin slab. The top surface of the precast thin slab is provided with a plurality of connecting grooves, the diameter of which decreases from the inside to the outside. A connecting component corresponding to each connecting groove is provided between the precast thin slab and the steel cage. The connecting assembly includes a connecting column fixed to the reinforcing cage and a plurality of barbs rotatably connected to the connecting column. The side wall of the connecting column is provided with grouting ports corresponding to the connecting column. The connecting column is also provided with a grouting channel communicating with the outside and the grouting ports. The plurality of barbs are spaced apart around the axial direction of the connecting column and rotate about the horizontal direction as the axis of rotation.

[0007] By adopting the above technical solution, grout is injected into the gap between the connecting column and the connecting groove through the grouting port and grouting channel, causing the barb to flip outward and unfold, hooking onto the inner wall of the connecting groove to form a mechanical hook anchoring; at the same time, after the grout solidifies, it bonds the connecting column and the precast thin plate into a whole. The grouting anchoring and mechanical hooking form a dual connection guarantee, enhancing the load-bearing capacity and durability of the connection node.

[0008] A direct mechanical force transmission path is established between the connecting column and the precast thin slab. When the composite layer is subjected to vertical load, the tensile force on the steel cage is directly transmitted to the precast thin slab through the connecting column and the barb strip, realizing reliable shear force transmission between the upper and lower structures. This effectively solves the problems of missing shear force transmission path and long-term slack state of connection nodes in the traditional method, and ensures the overall coordinated stress performance of the composite floor slab.

[0009] Preferably, the connecting assembly further includes a hoop slidably disposed on the outer periphery of the connecting post and an elastic member fixed between the hoop and the connecting post, the hoop moving axially along the connecting post, and the elastic member having a preload force that causes the hoop to move downward; A gap is provided between the hoop and the connecting groove.

[0010] By adopting the above technical solution, the clamp ring keeps the barb in a retracted state under the action of the elastic element, ensuring that the connecting column can smoothly enter the connecting groove with a smaller outer contour size, avoiding interference or jamming between the barb and the groove wall during the insertion process, and improving the smoothness and reliability of installation.

[0011] Preferably, the outer wall of the connecting column is provided with a plurality of through holes that connect the outside world and the grouting channel, and the plurality of through holes are spaced apart around the axial direction of the connecting column; The connecting assembly also includes a sunken plate that slides within the grouting channel and a force transmission rope fixed between the sunken plate and the hoop, the force transmission rope passing through the through hole.

[0012] By adopting the above technical solution, the two originally separate processes of "grouting construction" and "removing the barb constraint" are combined into one through mechanical linkage - the hoop ring is automatically triggered to move upward when grouting begins, without the need to set a separate unlocking operation step before grouting, thus achieving a high degree of process integration and automation.

[0013] After grouting begins, the grout is initially trapped above the sinking plate. At this time, the grouting pressure is entirely used to push the sinking plate downwards, rather than overflowing directly into the connecting groove. This allows the initial pressure of grouting to be effectively utilized to drive the linkage mechanism to complete the unlocking action. Once the sinking plate is in place and the grouting port is exposed, the accumulated grouting pressure is released instantly, and the grout flows out at a large initial flow rate, improving the density of the grout filling and the anchoring strength.

[0014] Preferably, the connecting assembly further includes a slurry guide hopper, the top of which extends to the side of the through hole opposite to the sinker plate, and the bottom of which extends to the sinker plate.

[0015] By adopting the above technical solution, the grout guide hopper can guide the grout flowing out of the through hole to the target area, avoiding disorderly diffusion or retention of the grout in the grouting cavity, and improving the directionality and effectiveness of grouting.

[0016] Preferably, the inner wall of the hoop is provided with a storage groove, and the inner wall of the storage groove is provided with a sliding groove; The storage groove is provided with a insertion ring, and a top rod is slidably provided on the inner wall of the groove. One end of the top rod that extends into the storage groove has a pressure surface for the insertion ring to press.

[0017] By adopting the above technical solution, the push rod extends under the drive of the insert ring, realizing active radial compression and locking of the contact surface between the connecting column and the connecting groove. In addition to mechanical hooking and grouting bonding, a third locking mechanism is added, which further enhances the ability of the connection node to resist vibration load and fatigue load, and effectively prevents the connection node from loosening due to fretting wear during long-term use.

[0018] Preferably, the side of the push rod facing away from the pressure surface is provided with an anti-slip pad.

[0019] By adopting the above technical solution, the anti-slip pad increases the friction coefficient between the extended end of the top rod and the contact surface, providing greater anti-slip resistance under the same top rod extrusion pressure. This effectively prevents relative slippage of the connection node under horizontal shear force, further ensuring the reliability of shear force transmission between the upper and lower structures.

[0020] Preferably, the hoop extends to the outside of the connecting groove, and the outer periphery of the hoop is provided with a ring-shaped first pigment area; Once the first pigment area is fully exposed, the hoop disengages from the barb.

[0021] By adopting the above technical solution, the setting of the first pigment area provides an intuitive and convenient visual indication method. Construction personnel do not need to use special measuring tools or instruments; they can accurately determine the position of the sinking plate by visual observation, which reduces the difficulty of quality inspection and the reliance on personnel experience.

[0022] Preferably, the outer periphery of the hoop is further provided with a ring-shaped second pigment area, which is located below the first pigment area; Once the second pigment area is fully exposed, the barb strip is in contact with the inner wall of the connecting groove.

[0023] By adopting the above technical solution, the second pigment area works in conjunction with the first pigment area to form a "multi-level indication" system, which provides more accurate information on the connection status – the first pigment area indicates "deployment start" and the second pigment area indicates "fitting complete", realizing refined monitoring of different stages of the anchoring process and facilitating construction personnel to confirm the installation quality in stages.

[0024] Preferably, the barb has a grouting cavity, and the barb has multiple grouting ports communicating with the grouting cavity on the side facing the connecting column. The connecting column has a grouting channel communicating with the grouting ports.

[0025] By adopting the above technical solution, the setting of the grouting cavity and grouting port allows the grout to penetrate from the inside of the barb to the outside, eliminating the problem of uneven force caused by point contact or line contact after the barb is flipped and unfolded, and significantly improving the sufficiency and uniformity of the anchoring.

[0026] Preferably, the connecting assembly also includes a grouting hose passing through the grouting channel and the grouting cavity.

[0027] By adopting the above technical solution, the setting of the grouting hose forms a flexible connection between the grouting channel and the grouting chamber, avoiding interference from the rotation of the barb strip during the grouting process.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. By flipping the bar outward and hooking it onto the inner wall of the connecting groove, a mechanical hook anchor is formed, establishing a direct shear force transmission path between the steel cage and the precast thin plate; at the same time, the connecting column and the precast thin plate are bonded into a whole by grouting anchor, and finally, with the help of the top rod radial compression, a dual connection guarantee is formed by mechanical anchor and grouting anchor.

[0029] 2. By setting up first and second pigment zones of different colors to form multi-level indicators, the previously invisible internal connection status is transformed into a visualized quantitative indicator, realizing process control and node acceptance of concealed works. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the rapidly assembled composite floor slab structure provided in an embodiment of the present invention.

[0031] Figure 2 This is a partial cross-sectional view provided in an embodiment of the present invention to illustrate the connecting components; Figure 3 This is a schematic diagram illustrating the structure of the first pigment region and the second pigment region provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 10, precast thin plate; 101, connecting groove; 20. Reinforcing cage; 30. Connecting component; 301. Connecting column; 3011. Grouting port; 3012. Grouting channel; 3013. Grouting channel; 302. Barb; 3021. Grouting chamber; 3022. Grouting port; 303. Hoop; 3031. Storage trough; 3032. Slide groove; 3033. Insert ring; 3034. Top rod; 3035. First pigment area; 3036. Second pigment area; 304. Sinking plate; 305. Force transmission rope; 306. Grouting hopper; 307. Grouting hose. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0034] This application discloses a rapidly assembled composite floor slab structure. (Refer to...) Figure 1-3 A quick-assembly composite floor slab structure includes a precast thin slab 10 and a steel cage 20 connected to the top surface of the precast thin slab 10. The top surface of the precast thin slab 10 has a plurality of connecting grooves 101, the diameter of which decreases from the inside to the outside. A connecting component 30 corresponding to the connecting grooves 101 is provided between the precast thin slab 10 and the steel cage 20.

[0035] The connecting assembly 30 includes a connecting column 301 fixed to the reinforcing cage 20 and a plurality of barbs 302 rotatably connected to the connecting column 301. The side wall of the connecting column 301 is provided with grouting ports 3011 corresponding to the connecting column 301. The connecting column 301 is also provided with grouting channels 3012 that connect the outside and the grouting ports 3011. The plurality of barbs 302 are spaced apart around the axial direction of the connecting column 301, and the barbs 302 rotate about the horizontal direction as the axis of rotation.

[0036] The rapid assembly composite floor slab structure provided in this application embodiment first involves hoisting the precast thin slab 10 into position and adjusting its elevation. Then, the prefabricated steel cage 20 is hoisted as a whole above the precast thin slab 10, aligning each connecting column 301 fixed to the bottom of the steel cage 20 with the corresponding connecting groove 101 on the top surface of the precast thin slab 10. The diameter of the connecting groove 101 decreases from the inside out, meaning the groove opening diameter is larger than the groove bottom diameter, forming a tapered guide structure that is larger at the top and smaller at the bottom. During hoisting, the barb 302 at the bottom of the connecting column 301 hangs down naturally under gravity (in a vertical or near-vertical state), smoothly entering the connecting groove 101 along with the connecting column 301.

[0037] After the connecting column 301 descends to the designed depth, high-strength micro-expansion grout is injected through the grouting port 3011 at the top of the connecting column 301. The grout is then transported through the grouting channel 3012 inside the connecting column 301 to the annular gap between the outer wall of the connecting column 301 and the inner wall of the connecting groove 101, thereby causing the barb 302 to flip outward and unfold. After the grout solidifies, it anchors the connecting column 301 and the precast thin plate 10 together, completing the rapid assembly connection between the reinforcing cage 20 and the precast thin plate 10.

[0038] Compared with the existing technology, grout is injected into the gap between the connecting column 301 and the connecting groove 101 through the grouting port 3011 and the grouting channel 3012, causing the barb 302 to flip outward and hook onto the inner wall of the connecting groove 101, forming a mechanical hook anchoring. At the same time, after the grout solidifies, it bonds the connecting column 301 and the precast thin plate 10 into a whole. The grouting anchoring and mechanical hooking form a dual connection guarantee, which enhances the load-bearing capacity and durability of the connection node.

[0039] A direct mechanical force transmission path is established between the connecting column 301 and the precast thin plate 10. When the composite layer is subjected to vertical load, the tensile force on the steel cage 20 is directly transmitted to the precast thin plate 10 through the connecting column 301 and the barb 302, realizing reliable shear force transmission between the upper and lower structures. This effectively solves the problems of missing shear force transmission path and long-term slack state of connection nodes in the traditional method, and ensures the overall coordinated stress performance of the composite floor slab.

[0040] In some embodiments, see Figure 2 The connecting assembly 30 also includes a hoop 303 slidably disposed on the outer periphery of the connecting post 301 and an elastic member fixed between the hoop 303 and the connecting post 301. The hoop 303 moves along the axial direction of the connecting post 301, and the elastic member has a preload force that causes the hoop 303 to move downward. The elastic member is a spring.

[0041] A gap is provided between the hoop 303 and the connecting groove 101.

[0042] Before the connecting post 301 is inserted into the connecting groove 101, the hoop 303 is located at the bottom of the connecting post 301 under the pre-tightening force of the elastic element, which restrains the barb 302 in a closed state, ensuring that the barb 302 will not unfold in advance and hinder insertion when it enters the connecting groove 101.

[0043] When the connecting column 301 and the hoop 303 enter the connecting groove 101 together, the hoop 303 descends with the connecting column 301. When grouting begins, the grouting material will squeeze the barb 302, causing the barb 302 to flip and unfold. At this time, since there is a gap between the hoop 303 and the connecting groove 101 (i.e., the outer diameter of the hoop 303 is smaller than the inner diameter of the connecting groove 101), the hoop 303 can slide upward relative to the connecting column 301. As the hoop 303 moves upward relative to the connecting column 301, the hoop 303 gradually gets rid of the constraint on the barb 302.

[0044] In some embodiments, see Figure 2 The outer wall of the connecting column 301 has multiple through holes that connect the outside world and the grouting channel 3012. The multiple through holes are spaced apart around the axial direction of the connecting column 301.

[0045] The connecting assembly 30 also includes a sinking plate 304 that slides in the grouting channel 3012 and a force transmission rope 305 that is fixed between the sinking plate 304 and the hoop 303, with the force transmission rope 305 passing through the through hole.

[0046] It should be noted that the highest point of the sinking plate 304's stroke is higher than the grouting port 3011, and the lowest point of the sinking plate 304's stroke is lower than the grouting port 3011.

[0047] After grouting begins, the grout material falls onto the surface of the sinking plate 304 first. As the grout material accumulates, the sinking plate 304 moves downward in the grouting channel 3012.

[0048] The sinking plate 304 moves downward and pulls the hoop 303 through the force transmission rope 305, causing the hoop 303 to slide upward along the connecting column 301; when the sinking plate 304 moves to the bottom of the grouting channel 3012, the hoop 303 disengages from the barb 302, and at the same time the sinking plate 304 exposes the grouting port 3011, so that the grouting material to be injected continues to flow out from the grouting port 3011.

[0049] In some embodiments, see Figure 2 The connecting assembly 30 also includes a slurry guide hopper 306, the top of which extends to the side of the through hole away from the sinker plate 304, and the bottom of which extends to the sinker plate 304.

[0050] The grout flows downward from the grouting channel 3012, passes through the grout guide hopper 306, and directly reaches the surface of the sinking plate 304, reducing the contact between the grout and the force transmission rope 305 and the through hole, thereby reducing interference with the movement of the force transmission rope 305.

[0051] In some embodiments, see Figure 2 and Figure 3 The inner wall of the hoop 303 is provided with a storage groove 3031, and the inner wall of the storage groove 3031 is provided with a sliding groove 3032.

[0052] The storage groove 3031 is provided with a ring 3033, and the inner wall of the sliding groove 3032 is provided with a push rod 3034. One end of the push rod 3034 that extends into the storage groove 3031 has a pressure surface for the ring 3033 to press.

[0053] After grouting is completed, the worker inserts the insertion ring 3033 into the placement groove 3031. The insertion ring 3033 presses against the top rod 3034 through the pressure surface, causing the top rod 3034 to move outward until it abuts against the inner wall of the connecting groove 101, achieving additional radial locking or anti-loosening effect. After the grout solidifies, the position of the insertion ring 3033 is fixed, and the top rod 3034 remains extended, forming a permanent locking node.

[0054] In some embodiments, the push rod 3034 is provided with an anti-slip pad on the side facing away from the pressure surface.

[0055] Under the continuous pressure of the top rod 3034, the anti-slip pad forms a contact pair with a high coefficient of friction with the contact surface.

[0056] In some embodiments, see Figure 3 The hoop 303 extends to the outside of the connecting groove 101, and the outer periphery of the hoop 303 is provided with an annular first pigment area 3035.

[0057] Once the first pigment area 3035 is fully exposed, the hoop 303 disengages from the barb 302.

[0058] As the hoop 303 moves upward relative to the connecting column 301, the first pigment area 3035 set on the outer periphery of the hoop 303 gradually emerges from the top surface of the groove opening of the connecting groove 101. Construction personnel can determine whether the hoop 303 has reached the preset position (located in the upper middle part of the barb 302) by observing whether the color mark of the first pigment is fully exposed. The position of the sinking plate 304 can be inferred from the position of the hoop 303. When the first pigment area 3035 is fully exposed, it indicates that the sinking plate 304 has exposed the grouting port 3011.

[0059] In some embodiments, see Figure 3 The outer periphery of the hoop 303 is also provided with a ring-shaped second pigment area 3036, which is located below the first pigment area 3035.

[0060] Once the second pigment zone 3036 is fully exposed, the barb 302 is in contact with the inner wall of the connecting groove 101.

[0061] It should be noted that the second pigment area 3036 has a different color than the first pigment area 3035.

[0062] After the first pigment area 3035 on the outer periphery of the hoop 303 is fully exposed, the hoop 303 continues to move upward relative to the first pigment area 3035, and the second pigment area 3036 located below the first pigment area 3035 is gradually exposed. When the second pigment area 3036 is fully exposed, it indicates that the hoop 303 has risen to a higher position. At this time, the barb 302 has been fully rotated outward and unfolded to its maximum angle, and it is tightly fitted with the inner wall of the connecting groove 101 (that is, the hook surface of the barb 302 is in complete contact with and pressed against the bearing surface of the connecting groove 101).

[0063] By observing whether the second pigment area 3036 is fully exposed, construction workers can determine whether the barb strip 302 and the inner wall of the connecting groove 101 have reached the design requirements for fit.

[0064] In some embodiments, see Figure 2 The barb 302 has a grouting cavity 3021 inside, and the barb 302 has multiple grouting ports 3022 connected to the grouting cavity 3021 on the side facing the connecting column 301. The connecting column 301 has a grouting channel 3013 connected to the grouting ports 3022.

[0065] After the connecting post 301 is inserted and positioned and the barb 302 is deployed and hooked, grout is injected into the grouting cavity 3021 inside the barb 302 through the grouting channel 3013 provided on the connecting post 301. The grout enters the grouting cavity 3021 through the grouting channel 3013 and flows outward through multiple grouting ports 3022 opened on one side of the barb 302 toward the connecting post 301, filling the tiny gaps. After grouting is completed, the grout solidifies, forming a fully enclosed adhesive anchor between the barb 302 and the inner wall of the connecting groove 101 and the connecting post 301.

[0066] In some embodiments, see Figure 2 The connecting assembly 30 also includes a grouting hose 307 that passes through the grouting channel 3013 and the grouting cavity 3021.

[0067] During grouting, one end of the grouting hose 307 is connected to the external grouting equipment, and the other end is inserted through the grouting channel 3013 and into the grouting chamber 3021. The grouting equipment is started, and the grout is directly delivered to the grouting chamber 3021 through the grouting hose 307 and flows out through the grouting port 3022. After grouting is completed, before the grout initially sets, the grouting hose 307 is withdrawn from the grouting channel 3013 and the grouting chamber 3021. The remaining grout in the grouting channel 3013 then solidifies naturally or is sealed by the operator.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapidly assembled composite floor slab structure, characterized in that, The device includes a precast thin plate and a reinforcing cage connected to the top surface of the precast thin plate. The top surface of the precast thin plate has multiple connecting grooves, the diameter of which decreases from the inside to the outside. A connecting component corresponding to each connecting groove is provided between the precast thin plate and the reinforcing cage. The connecting assembly includes a connecting column fixed to the reinforcing cage and a plurality of barbs rotatably connected to the connecting column. The side wall of the connecting column is provided with grouting ports corresponding to the connecting column. The connecting column is also provided with a grouting channel communicating with the outside and the grouting ports. The plurality of barbs are spaced apart around the axial direction of the connecting column and rotate about the horizontal direction as the axis of rotation.

2. The quick-assembled composite floor slab assembly structure according to claim 1, wherein, The connecting assembly further includes a hoop slidably disposed on the outer periphery of the connecting post and an elastic member fixed between the hoop and the connecting post. The hoop moves along the axial direction of the connecting post, and the elastic member has a preload force that causes the hoop to move downward. A gap is provided between the hoop and the connecting groove.

3. The rapidly assembled composite floor slab structure according to claim 2, characterized in that, The outer wall of the connecting column is provided with a plurality of through holes that connect the outside world and the grouting channel, and the plurality of through holes are spaced apart around the axial direction of the connecting column; The connecting assembly also includes a sunken plate that slides within the grouting channel and a force transmission rope fixed between the sunken plate and the hoop, the force transmission rope passing through the through hole.

4. The rapidly assembled composite floor slab structure according to claim 3, characterized in that, The connecting assembly also includes a slurry guide hopper, the top of which extends to the side of the through hole opposite to the sinker plate, and the bottom of which extends to the sinker plate.

5. A rapidly assembled composite floor slab structure according to claim 2, characterized in that, The inner wall of the hoop is provided with a storage groove, and the inner wall of the storage groove is provided with a sliding groove; The storage groove is provided with a insertion ring, and a top rod is slidably provided on the inner wall of the groove. One end of the top rod that extends into the storage groove has a pressure surface for the insertion ring to press.

6. The rapidly assembled composite floor slab structure according to claim 5, characterized in that, The side of the top rod away from the pressure surface is provided with an anti-slip pad.

7. A rapidly assembled composite floor slab structure according to claim 2, characterized in that, The hoop extends to the outside of the connecting groove, and the outer periphery of the hoop is provided with a ring-shaped first pigment area; Once the first pigment area is fully exposed, the hoop disengages from the barb.

8. A rapidly assembled composite floor slab structure according to claim 7, characterized in that, The outer periphery of the hoop is also provided with a ring-shaped second pigment area, which is located below the first pigment area; Once the second pigment area is fully exposed, the barb strip is in contact with the inner wall of the connecting groove.

9. A rapidly assembled composite floor slab structure according to claim 1, characterized in that, The barb has a grouting cavity, and the barb has multiple grouting ports connected to the grouting cavity on the side facing the connecting column. The connecting column has a grouting channel connected to the grouting ports.

10. A rapidly assembled composite floor slab structure according to claim 9, characterized in that, The connecting assembly also includes a grouting hose that passes through the grouting channel and the grouting cavity.

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