Prefabricated slab structure for closing post-cast strip of basement in advance and construction method
By using the basement rear pouring strip to seal the prefabricated plate structure in advance during construction, the problem of impacting the construction progress caused by the conflict between the foundation position of the building building and the rear pouring strip is solved, and the effect of improving construction efficiency and shortening construction period is achieved.
Patent Information
- Application Number
- CN202411995605.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-05-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During construction, the foundation position of the building body conflicts with the rear pouring belt, which affects the construction progress.
The prefabricated plate structure is closed in advance by using the basement rear pouring belt. By setting up sealing components and fixed structures on the top plate, the rear pouring belt is initially closed and the final seal is carried out after the construction is completed to reduce the interference of the rear pouring belt on the construction.
By closing the post-pouring strip in advance, it reduces its interference in subsequent construction, improves construction efficiency, shortens construction period, and prevents moisture from entering the basement.
Smart Images
Figure CN119981151A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of housing construction, and in particular to a prefabricated panel structure and construction method for enclosing a basement post-cast zone in advance. Background Art
[0002] A post-cast strip is a concrete strip left at the corresponding positions of the foundation slab, wall, or beam in accordance with design or construction specifications to prevent harmful cracks that may be caused by uneven shrinkage or settlement of the reinforced concrete structure during construction.
[0003] In some building structures, a post-cast strip is set on the top slab of the basement. According to the design requirements, the settlement post-cast strip should be poured after the main structure is completed and the settlement is stable. However, in actual construction, in order to ensure on-site flow construction, the building body is constructed on the top slab of the basement. When the foundation position of the building body conflicts with the post-cast strip, the construction facilities on the top slab cannot be smoothly constructed, which affects the construction progress.
[0004] With respect to the above-mentioned related technologies, the inventors believe that when the foundation position of a building body conflicts with the post-cast strip, the building facilities cannot be smoothly constructed, thus affecting the construction progress. Summary of the invention
[0005] The purpose of this application is to provide a prefabricated slab structure and construction method for enclosing the basement post-cast strip in advance, so as to improve the problem that when the foundation position of the building body conflicts with the post-cast strip, the building facilities cannot be constructed smoothly, thus affecting the construction progress.
[0006] The present application provides a prefabricated slab structure with a pre-closed basement post-cast strip, which adopts the following technical solution: A prefabricated slab structure for closing a basement post-cast strip in advance comprises a top plate arranged above the basement, a post-cast strip being left on the top plate, closing components being arranged on the top plates on both sides of the post-cast strip, the closing components being arranged along the length direction of the post-cast strip, a fixed structure being arranged below the closing component, the fixed structure being arranged along the side walls of the top plate on both sides of the post-cast strip, the top of the fixed structure being connected to the closing component, and a sealing component being filled between the bottom of the closing component and the side walls of the top plate on both sides of the post-cast strip.
[0007] By adopting the above technical scheme, a fixed structure is set on the side walls of the top plate on both sides of the post-cast strip, the closing component is fixed by the fixed structure, and the closing component is set on the top plate along the length direction of the post-cast strip to preliminarily close the post-cast strip, ensuring that the construction of building facilities on the basement top plate is not disturbed by the post-cast strip on the top plate, and affecting the subsequent construction of the building; a sealing component is set between the bottom of the closing component and the side wall of the top plate, and after the construction of the building facilities above the basement top plate is completed, the gap between the closing component and the top plates on both sides of the post-cast strip is finally closed by pouring concrete, and the sealing component is used to prevent moisture from entering the basement through the closing component; by sealing the post-cast strip in advance, the interference of the post-cast strip on the subsequent construction of the building is reduced.
[0008] Optionally, the side walls of the top plate on both sides of the post-cast strip on the top plate are provided with limiting grooves, and the side walls of the top plate close to the post-cast strip are stepped after the limiting grooves are provided, and the fixed structure includes a fixing frame, and the limiting groove of the top plate is provided with a plurality of fixing parts extending upward on one side close to the post-cast strip, and a fixing groove corresponding to the fixing part is provided below the two ends of the fixing frame, the fixing frame is connected to the limiting grooves on both sides of the post-cast strip, and the two sides of the fixing frame are connected to the closing component.
[0009] By adopting the above technical scheme, stepped limit grooves are opened on the side walls of the top plate on both sides of the post-cast strip, and the fixing frame is arranged on the top plate through the installation groove corresponding to the fixing parts on the limit groove, and the closing component is connected. The gap of the post-cast strip is closed by the closing component, which plays a certain supporting role for the closing component and prevents the closing component from falling from the post-cast strip during the process of fixing with the top plate.
[0010] Optionally, installation grooves are opened on the post-cast strips on the top plate on both sides of the fixing frame, the inner side walls of the installation grooves correspond to the side walls at both ends of the closing component, and baffles are arranged at both ends of the fixing frame, and the baffles are arranged along both sides of the closing component.
[0011] By adopting the above technical solution, installation grooves are opened on both sides of the fixing frame to support and fix the closed components, and at the same time, the gaps between the closed components are blocked to prevent foreign objects from entering the basement through the gaps and the gaps in the post-cast strips. A pair of baffles are used on both sides of the fixing frame to block the closed components and limit the position of the closed components, thereby reducing the possibility of the closed components detaching from the fixing frame and exposing the gaps in the post-cast strips to the outside.
[0012] Optionally, the closing assembly includes a plurality of prefabricated cover plates, wherein the prefabricated cover plates are arranged along the length direction of the post-cast strip on the top plate, and fixing rods are provided in the prefabricated cover plates, and the fixing rods are staggered in the prefabricated cover plates. Part of the fixing rods extend from the side walls of the prefabricated cover plates, and adjacent prefabricated cover plates are connected by fixing rods extending from both ends. Both ends of the prefabricated cover plates are connected to the mounting grooves on the fixing frame, and the two sides of the prefabricated cover plates close to the fixing frame correspond to the baffles, and the top of the fixing frame is in contact with the fixing rods extending from both ends of the prefabricated cover plates.
[0013] By adopting the above technical scheme, fixing rods are staggered in the prefabricated cover plate to enhance the bearing capacity of the prefabricated cover plate, and reduce the possibility of the prefabricated cover plate breaking on the post-cast strip on the top plate as much as possible, and the fixing rods extending from both sides of the prefabricated plate are connected to the fixing parts 2 arranged on both sides of the post-cast strip of the top plate, and the prefabricated cover plate is fixed in the installation groove on the fixing frame, and the prefabricated cover plate is arranged along the length direction of the post-cast strip, and the gap of the post-cast strip on the top plate is closed, so that the construction of subsequent buildings on the top plate can proceed smoothly, thereby improving the construction efficiency and shortening the construction period.
[0014] Optionally, a second fixing groove is opened at the bottom of the prefabricated cover plate, and the second fixing groove is fitted with the first fixing piece arranged on the top plate. The top plate side walls on both sides of the post-cast strip on the top plate are provided with second fixing pieces, and the second fixing pieces are connected to the fixing rods extending from both sides of the prefabricated cover plate. The bottom of the prefabricated cover plate is connected to the closing component.
[0015] By adopting the above technical scheme, the prefabricated cover plate is further fixed by fitting the fixing groove 2 opened at the bottom of the prefabricated cover plate with the fixing piece 1 on the top plate, and then the fixing rods extending from both sides of the prefabricated cover plate are connected with the fixing piece 2 on the side wall of the top plate, and the prefabricated cover plate and the top plate are pushed together, so as to close and fix the gap between the closed cover plate and the top plate after the construction of the building facilities on the top plate is completed.
[0016] Optionally, the sealing assembly includes a seal 1, which is arranged on the limiting grooves opened on the side walls of the top plate on both sides of the post-cast strip, and the seal 1 is located below the prefabricated cover plate. Both ends of the seal 1 are against the side walls of the fixing frame, and a fixing groove 3 is opened on the seal 1, and the fixing groove 3 is in contact with the fixing member 1 set on the limiting groove.
[0017] By adopting the above technical solution, the seal one is set on the limiting groove below the prefabricated cover plate, and the seal one is fixed by the three fixing grooves opened on the seal. The seal one is used to block the gap between the bottom of the prefabricated cover plate and the post-cast strip, and the post-cast strip is further sealed. At the same time, moisture is prevented as much as possible from entering the gap of the post-cast strip along the bottom of the prefabricated cover plate and flowing into the basement.
[0018] Optionally, a second seal is provided on the first seal extending upward from a side of the post-cast strip left on the top plate, and the second seal is in contact with a side of the prefabricated cover plate away from the post-cast strip.
[0019] By adopting the above technical solution, the side wall of the prefabricated cover plate is further sealed by the seal member 2 which is extended upward from the seal member 1, so as to prevent moisture from flowing into the basement along the gap between the side wall of the prefabricated cover plate and the post-cast strip on the top plate, thereby affecting the construction in the basement. Optionally, a second baffle is provided above the prefabricated cover plate, and the second baffle is provided along the length direction of the post-cast strip reserved on the top plate. A connecting rod corresponding to the side of the prefabricated cover plate away from the post-cast strip is provided below the second baffle, and the connecting rod is in contact with the second fixing member and the fixing rod.
[0020] By adopting the above technical solution, the gap between the prefabricated cover plate and the top plate is blocked by baffle plate 2, and the connecting rod arranged under baffle plate 2 contacts with fixing member 2 in the gap between the prefabricated cover plate and the top plate to fix baffle plate 2 to prevent baffle plate 2 from detaching from the top of the prefabricated cover plate. Baffle plate 2 is used to prevent foreign matter from entering the gap as much as possible, which would affect the subsequent filling of concrete in the gap between the prefabricated cover plate and the top plate.
[0021] Optionally, a construction method for a precast slab structure with a basement post-cast zone sealed in advance comprises the following steps: When the post-cast strip is left above the top plate of the basement, fixing grooves are set on the side walls of the top plate on both sides of the post-cast strip, so that the side walls of the top plate are stepped after the fixing grooves are set, and a part of the fixing piece 1 and the fixing piece 2 on the top plate are exposed; After the post-casting strip is set, the edges of the top plate side walls on both sides of the post-casting strip are smoothed, and then the prefabricated cover plate is set on the post-casting strip to close the post-casting strip; After the post-casting strip of the basement top slab is sealed, the construction of the building facilities above the top slab begins; After the construction of the building facilities above the top plate is completed, concrete is poured between the prefabricated cover plate and the top plate to complete the sealing.
[0022] Optionally, the basement post-cast zone is closed in advance, including the following steps: The fixing groove 1 on the fixing frame is fitted with the fixing piece 1 in the limiting groove, the fixing frame is set on the limiting grooves on the top plates on both sides of the post-casting strip, the prefabricated cover plate is set on the installation grooves provided at both ends of the adjacent fixing frames along the length direction of the post-casting strip, the fixing groove 2 below the prefabricated cover plate is fitted with the fixing piece 1, and the prefabricated cover plate is fixed; A sealing member 1 is provided on the limiting groove below the prefabricated cover plate to seal the lower part of the prefabricated cover plate and the side wall of the limiting groove. The fixing rod in the prefabricated cover plate is connected to the fixing member 2 on the side wall of the top plate. Adjacent prefabricated cover plates are connected and fixed by the fixing rods at both ends of the prefabricated cover plates. After the prefabricated cover plate is set, the baffle plate 2 is placed on the prefabricated cover plate, and the connecting rod is located in the gap between the prefabricated cover plate and the top plate to contact the fixing member 2, and the baffle plate 2 is fixed to isolate the gap that has been initially closed on the post-casting belt from the outside world to prevent foreign objects from falling into the gap; Remove the second baffle from the precast cover plate between the post-cast strips, pour concrete in the gap between the precast cover plate and the top plate for final sealing, and also fill and seal the position where the fixing rods on the fixing frames between adjacent precast cover plates are connected with concrete.
[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. A stepped limiting groove is provided on the side walls of the top plate on both sides of the post-casting strip, and the fixing frame is arranged on the top plate through the installation groove corresponding to the fixing pieces on the limiting groove, and the closing component is connected. The gap of the post-casting strip is closed by the closing component, which plays a certain supporting role for the closing component to prevent the closing component from falling from the post-casting strip during the process of fixing with the top plate; 2. Staggered fixing rods are arranged in the prefabricated cover plate to strengthen the bearing capacity of the prefabricated cover plate, and the possibility of the prefabricated cover plate breaking on the post-casting strip on the top plate is reduced as much as possible. The fixing rods extending from both sides of the prefabricated plate are connected with the fixing parts 2 arranged on both sides of the post-casting strip of the top plate, and the prefabricated cover plate is fixed in the installation groove on the fixing frame. The prefabricated cover plate is arranged along the length direction of the post-casting strip, and the gap of the post-casting strip on the top plate is closed, so that the subsequent construction on the top plate can be carried out smoothly, the construction efficiency is improved, and the construction period is shortened; 3. Use baffle 2 to block the gap between the prefabricated cover plate and the top plate. The connecting rod arranged under baffle 2 contacts the fixed frame in the gap between the prefabricated cover plate and the top plate to fix baffle 2 to prevent baffle 2 from detaching from the top of the prefabricated cover plate. Use baffle 2 to prevent foreign matter from entering the gap as much as possible, which will affect the subsequent filling of concrete in the gap between the prefabricated cover plate and the top plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is an overall schematic diagram of a precast slab structure with a basement post-cast zone sealed in advance.
[0025] Figure 2 It is a partial cross-sectional view of the precast slab structure with the post-cast strip closed in advance.
[0026] Figure 3 yes Figure 2 A partial enlarged view of middle A.
[0027] In the figure, 1, top plate; 11, limiting groove; 12, fixing part 1; 13, fixing part 2; 2, post-casting strip; 3, closing component; 31, prefabricated cover plate; 311, fixing groove 2; 32, fixing rod; 4, fixing structure; 41, fixing frame; 411, fixing groove 1; 412, installation groove; 42, baffle 1; 5, sealing component; 51, sealing part 1; 511, fixing groove 3; 52, sealing part 2; 6, baffle 2; 61, connecting rod. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.
[0029] Embodiment 1 A precast slab structure with a basement post-cast zone closed in advance, referring to Figure 1 , including a top plate 1 above the basement, a post-cast strip 2 is left on the top plate 1, and a limiting groove 11 is opened on the side walls of the top plate 1 on both sides of the post-cast strip 2, so that the side walls of the top plate 1 on both sides of the post-cast strip 2 are stepped, and a fixing frame 41 is set on the limiting groove 11 along the width direction of the post-cast strip 2, and a certain distance is left between adjacent fixing frames 41, so as to facilitate the installation of the prefabricated cover plate 31; a fixing piece 12 is pre-embedded in the limiting groove 11 on both sides of the post-cast strip 2 of the top plate 1, and the fixing piece 12 is a protruding steel bar column pre-embedded in the limiting groove 11 of the top plate 1, and is connected with the metal fixing frame The fixing groove 411 opened below 41 fits together to fix the fixing frame 41 and prevent the fixing frame 41 from separating from the post-casting strip 2; installation grooves 412 are opened on both sides of the fixing frame 41, and the prefabricated cover plate 31 is set in the installation groove 412 of the adjacent fixing frame 41 and connected to the fixing frame 41, so that the fixing rods 32 extending from both ends of the prefabricated cover plate 31 are in contact with the top of the fixing frame 41, and the fixing rods 32 are supporting steel bars embedded in the prefabricated cover plate 31. Metal baffles 42 are welded at both ends of the fixing frame 41 to block the position of the prefabricated cover plate 31.
[0030] Reference Figure 1 and Figure 2, a fixing part 2 13 is pre-embedded in the side wall of the top plate 1 on both sides of the post-casting strip 2 on the top plate 1, and the fixing part 2 13 is a steel bar pre-embedded in the top plate 1, and is welded and fixed to the fixing rods 32 extending from both sides of the prefabricated cover plate 31 made of reinforced concrete, and the fixing rods 32 serving as supporting steel bars in the prefabricated cover plate 31 are arranged alternately; a fixing groove 2 311 is opened below the prefabricated cover plate 31, which fits with the fixing part 12 pre-embedded in the limit groove 11, and the prefabricated cover plate 31 is further fixed, and the prefabricated cover plate 31 is installed on the fixing frame 41 and arranged along the length direction of the post-casting strip 2, so that the prefabricated cover plate 31 and the top plate 1 are relative to each other. Keep it flat, and the fixing rods 32 between adjacent precast cover plates 31 are welded and fixed to each other to close the gap in the post-cast strip 2 on the top plate 1; place the baffle plate 2 6 on the precast cover plate 31 to block the gap between the precast cover plate 31 and the top plate 1, and the metal connecting rod 61 welded under the baffle plate 2 6 contacts the fixing piece 2 13 in the gap between the precast cover plate 31 and the top plate 1 to fix the baffle plate 2 6 to prevent the baffle plate 2 6 from detaching from the top of the precast cover plate 31, and use the baffle plate 2 6 to prevent foreign matter from entering the gap as much as possible, which will affect the subsequent filling of concrete in the gap between the precast cover plate 31 and the top plate 1.
[0031] Reference Figure 2 and Figure 3 A sealing member 51 is arranged between the limiting grooves 11 opened on the top plate 1 at both sides of the post-cast strip 2 and the bottom of the prefabricated cover plate 31. The sealing member 51 is fixed on the limiting grooves 11 by fitting the fixing grooves 3 511 opened on the sealing member 51 with the fixing members 12. The sealing member 51 is a sealing rubber pad, which blocks the gap between the bottom of the prefabricated cover plate 31 and the post-cast strip 2, and prevents moisture from entering the gap of the post-cast strip 2 along the bottom of the prefabricated cover plate 31 as much as possible; the sealing member 2 52 extending upward from the sealing member 51 further seals the side wall of the prefabricated cover plate 31. The sealing member 2 52 is also a sealing rubber pad, which prevents moisture from flowing into the basement along the side wall of the prefabricated cover plate 31 and the gap of the post-cast strip 2 on the top plate 1, thereby affecting the construction in the basement.
[0032] Embodiment 2 S100, when the post-cast strip 2 is left above the top plate 1 of the basement, fixing grooves are set on the side walls of the top plate 1 on both sides of the post-cast strip 2, so that the side walls of the top plate 1 are stepped after the fixing grooves are set, and a part of the fixing piece 12 and the fixing piece 2 13 on the top plate 1 are exposed; S200, after the post-cast strip 2 is set, the side wall edges of the top plate 1 on both sides of the post-cast strip 2 are smoothed, and then the prefabricated cover plate 31 is set on the post-cast strip 2 to close the post-cast strip 2; S210, by fitting the fixing groove 1 411 provided on the fixing frame 41 with the fixing piece 12 provided in the limiting groove 11, the fixing frame 41 is set on the limiting groove 11 provided on the top plate 1 on both sides of the post-cast strip 2, and the prefabricated cover plate 31 is set on the installation grooves 412 provided at both ends of the adjacent fixing frames 41 along the length direction of the post-cast strip 2, and the fixing groove 2 311 provided below the prefabricated cover plate 31 is fitted with the fixing piece 12, so as to fix the prefabricated cover plate 31; S220, a sealing member 51 is provided on the limiting groove 11 below the prefabricated cover plate 31 to seal the lower part of the prefabricated cover plate 31 and the side wall of the limiting groove 11, the fixing rod 32 in the prefabricated cover plate 31 is connected to the fixing member 2 13 on the side wall of the top plate 1, and adjacent prefabricated cover plates 31 are connected and fixed by the fixing rods 32 at both ends of the prefabricated cover plates 31; S230, after the prefabricated cover plate 31 is set, the baffle plate 2 6 is placed above the prefabricated cover plate 31, and the connecting rod 61 is located in the gap between the prefabricated cover plate 31 and the top plate 1 to contact the fixing member 2 13, and the baffle plate 2 6 is fixed to block the gap on the post-casting strip 2 that has been initially closed from the outside world to prevent foreign matter from falling into the gap; S300, after the post-casting strip 2 of the basement top plate 1 is sealed, construction of the building facilities above the top plate 1 begins; S400, after the construction of the building facilities above the top plate 1 is completed, concrete is poured between the prefabricated cover plate 31 and the top plate 1 to complete the sealing. S410, remove the baffle plate 2 6 from the precast cover plate 31 between the post-cast strips 2, pour concrete in the gap between the precast cover plate 31 and the top plate 1 for final sealing, and also fill and seal the position where the fixing rod 32 on the fixing frame 41 between adjacent precast cover plates 31 is connected with concrete. The implementation principle of the embodiment of the present application is: The fixing frames 41 are arranged at a distance on the limiting grooves 11 of the top plate 1 on both sides of the post-casting strip 2, and then the sealing members 51 are arranged on the limiting grooves 11 between the adjacent fixing frames 41, and the sealing members 51 are fixed, and then the prefabricated cover plate 31 is arranged in the installation grooves 412 at both ends of the adjacent fixing frames 41, so that the prefabricated cover plate 31 is arranged along the length direction of the post-casting strip 2, and the gap between the prefabricated cover plate 31 and the post-casting strip 2 is blocked by the sealing members 51 and the sealing members 52 extending from the sealing members 51; the fixing rods 32 on both sides of the prefabricated cover plate 31 are connected and fixed to the fixing members 13 on the side wall of the top plate 1, and the adjacent prefabricated cover plates 31 are connected. The fixing rods 32 at both ends of 1 are connected and fixed to each other on the fixing frame 41, so that the precast cover plate 31 is fixed on the post-cast strip 2, the post-cast strip 2 is closed in advance, and the baffle plate 2 6 is placed on the precast cover plate 31 to block the gap between the precast cover plate 31 and the top plate 1; then after the construction of the building facilities on the basement top plate 1 is completed, the steel plate 2 on the precast cover plate 31 is taken out, and concrete is poured in the gap between the precast cover plate 31 and the top plate 1 for the final closing, and the position where the fixing rods 32 on the fixing frame 41 between adjacent precast cover plates 31 are connected is also filled and closed with concrete, so that the precast cover plate 31 and the top plate 1 remain flat. By using the precast cover plate 31 to close the post-cast strip 2 in advance, the interference of the post-cast strip 2 on the top plate 1 on the subsequent construction is reduced.
[0033] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A prefabricated plate structure with a basement post-cast strip closed in advance, comprising a top plate (1) arranged above the basement, a post-cast strip (2) being left on the top plate (1), characterized in that: A closing component (3) is arranged on the top plate (1) on both sides of the post-cast strip (2), and the closing component (3) is arranged along the length direction of the post-cast strip (2). A fixing structure (4) is arranged below the closing component (3), and the fixing structure (4) is arranged along the side walls of the top plate (1) on both sides of the post-cast strip (2). The top of the fixing structure (4) is connected to the closing component (3), and a sealing component (5) is filled and arranged between the bottom of the closing component (3) and the side walls of the top plate (1) on both sides of the post-cast strip (2).
2. The prefabricated slab structure with a basement post-cast zone closed in advance according to claim 1 is characterized by: The side walls of the top plate (1) on both sides of the post-cast strip (2) on the top plate (1) are provided with limiting grooves (11), and the side walls of the top plate (1) close to the post-cast strip (2) are stepped after the limiting grooves (11) are provided. The fixing structure (4) comprises a fixing frame (41), and a plurality of fixing members (12) are provided extending upward from one side of the limiting groove (11) of the top plate (1) close to the post-cast strip (2). A fixing groove (411) corresponding to the fixing member (12) is provided below both ends of the fixing frame (41), and the fixing frame (41) is connected to the limiting grooves (11) on both sides of the post-cast strip (2), and both sides of the fixing frame (41) are connected to the closing component (3).
3. The prefabricated slab structure with a basement post-cast zone closed in advance according to claim 2 is characterized in that: The post-cast strip (2) on both sides of the fixing frame (41) is provided with mounting grooves (412), the inner side walls of the mounting grooves (412) correspond to the side walls at both ends of the closing component (3), and baffle plates (42) are provided at both ends of the fixing frame (41), and the baffle plates (42) are arranged along both sides of the closing component (3).
4. The prefabricated slab structure for enclosing the post-cast zone of the basement according to claim 3 is characterized by: The closing assembly (3) comprises a plurality of prefabricated cover plates (31), the prefabricated cover plates (31) being arranged along the length direction of the post-cast strip (2) on the top plate (1), the prefabricated cover plates (31) being provided with fixing rods (32), the fixing rods (32) being arranged in a staggered manner in the prefabricated cover plates (31), the side walls of the prefabricated cover plates (31) extending part of the fixing rods (32), adjacent prefabricated cover plates (31) being connected via the fixing rods (32) extending at both ends, the two ends of the prefabricated cover plates (31) being connected to the mounting grooves (412) on the fixing frame (41), the two sides of the prefabricated cover plates (31) close to the fixing frame (41) corresponding to the baffle plate 1 (42), and the top of the fixing frame (41) being in contact with the fixing rods (32) extending at both ends of the prefabricated cover plates (31).
5. The prefabricated slab structure for enclosing the post-cast zone of the basement according to claim 4 is characterized by: A second fixing groove (311) is provided below the prefabricated cover plate (31), and the second fixing groove (311) is fitted with the first fixing member (12) provided on the top plate (1). The side walls of the top plate (1) on both sides of the post-cast strip (2) on the top plate (1) are provided with second fixing members (13), and the second fixing members (13) are connected to the fixing rods (32) extending from both sides of the prefabricated cover plate (31). The bottom of the prefabricated cover plate (31) is connected to the closing component (3).
6. The prefabricated slab structure for enclosing the post-cast zone of the basement according to claim 5 is characterized by: The sealing assembly (5) comprises a sealing member 1 (51), wherein the sealing member 1 (51) is arranged on the limiting grooves (11) provided on the side walls of the top plate (1) on both sides of the post-cast strip (2), the sealing member 1 (51) is located below the prefabricated cover plate (31), the two ends of the sealing member 1 (51) are against the side walls of the fixing frame (41), the sealing member 1 (51) is provided with a fixing groove 3 (511), and the fixing groove 3 (511) is in contact with the fixing member 1 (12) provided on the limiting groove (11).
7. The prefabricated slab structure for enclosing the post-cast zone of the basement according to claim 6 is characterized by: A second seal (52) is provided on the side of the first seal (51) away from the post-cast strip (2) left on the top plate (1) and extends upward, and the second seal (52) is in contact with the side of the prefabricated cover plate (31) away from the post-cast strip (2).
8. The prefabricated slab structure for enclosing the post-cast zone of the basement according to claim 4 is characterized by: A second baffle plate (6) is arranged above the prefabricated cover plate (31), and the second baffle plate (6) is arranged along the length direction of the post-cast strip (2) left on the top plate (1). A connecting rod (61) corresponding to the side of the prefabricated cover plate (31) away from the post-cast strip (2) is arranged below the second baffle plate (6), and the connecting rod (61) is in contact with the second fixing member (13) and the fixing rod (32).
9. A construction method for a prefabricated slab structure with a basement post-cast zone sealed in advance, characterized in that: It comprises a prefabricated slab structure with a basement post-cast strip closed in advance as described in claims 1-8, S100, when the post-cast strip (2) is left above the top plate (1) of the basement, fixing grooves are provided on the side walls of the top plate (1) on both sides of the post-cast strip (2), so that the side walls of the top plate (1) are stepped after the fixing grooves are provided, and a portion of the fixing member 1 (12) and the fixing member 2 (13) on the top plate (1) are exposed; S200, after the post-casting strip (2) is set, the side wall edges of the top plate (1) on both sides of the post-casting strip (2) are smoothed, and then the prefabricated cover plate (31) is set on the post-casting strip (2) to preliminarily close the post-casting strip (2); S300, after the post-cast strip (2) of the basement top plate (1) is sealed, construction of building facilities above the top plate (1) begins; S400, after the construction of the building facilities above the top plate (1) is completed, concrete is poured between the prefabricated cover plate (31) and the top plate (1) to complete the sealing.
10. The construction method of a prefabricated slab structure with a basement post-cast zone sealed in advance according to claim 9, characterized in that: S210, by fitting a fixing groove 1 (411) provided on the fixing frame (41) with a fixing piece 1 (12) provided in the limiting groove (11), the fixing frame (41) is arranged on the limiting grooves (11) provided on the top plates (1) on both sides of the post-cast strip (2), the prefabricated cover plate (31) is arranged on the installation grooves (412) provided at both ends of the adjacent fixing frames (41) along the length direction of the post-cast strip (2), the fixing groove 2 (311) provided below the prefabricated cover plate (31) is fitted with the fixing piece 1 (12), and the prefabricated cover plate (31) is fixed; S220, a sealing member 1 (51) is provided on the limiting groove (11) below the prefabricated cover plate (31) to seal the lower part of the prefabricated cover plate (31) and the side wall of the limiting groove (11), a fixing rod (32) in the prefabricated cover plate (31) is connected to a fixing member 2 (13) on the side wall of the top plate (1), and adjacent prefabricated cover plates (31) are connected and fixed by the fixing rods (32) at both ends of the prefabricated cover plates (31); S230, after the prefabricated cover plate (31) is set, the second baffle plate (6) is placed above the prefabricated cover plate (31), and the second baffle plate (6) is fixed by the connecting rod (61) in the gap between the prefabricated cover plate (31) and the top plate (1) so as to contact the second fixing member (13), thereby isolating the gap on the post-cast strip (2) that has been initially closed from the outside world and preventing foreign matter from falling into the gap; S410, remove the second baffle plate (6) from the precast cover plate (31) between the post-cast strips (2), pour concrete in the gap between the precast cover plate (31) and the top plate (1) for final sealing, and similarly fill and seal the position where the fixing rod (32) on the fixing frame (41) between adjacent precast cover plates (31) is connected with concrete.