Floor slab prefabricated part for underground garage construction and construction method thereof

Abstract

The invention relates to the field of floor prefabricated parts, in particular to a floor prefabricated part for underground garage construction and a construction method thereof, and solves the problems that when adjacent floor prefabricated parts are attached after the floor prefabricated parts are transported and placed on a beam of an underground garage, the positions of the floor prefabricated parts often need to be manually finely adjusted, and the construction efficiency is high. The problems that the floor prefabricated parts are heavy, the floor prefabricated parts are difficult to adjust by workers, and gaps exist due to loose connection between the adjacent floor prefabricated parts are solved. According to the floor slab prefabricated part for underground garage construction and the construction method of the floor slab prefabricated part, the floor slab prefabricated part comprises a plurality of prefabricated floor slabs, the upper surfaces of the prefabricated floor slabs are covered with waterproof layers, the prefabricated floor slabs are hollow and detachably provided with reinforcing linings, and the reinforcing linings are of honeycomb structures. The moving difficulty of the floor prefabricated part is reduced by assisting in moving the prefabricated slab, workers can conveniently and finely adjust the position of the floor prefabricated part, and the construction efficiency of the workers is improved.

Description

Technical Field

[0001] The present invention relates to the field of precast floor components, and particularly to a precast floor component for underground garage construction and its construction method. Background Technique

[0002] Precast components refer to components prefabricated in a factory, including pressure plates, floor slabs, wall panels, columns, beams, prestressed components, etc. After passing quality inspection, they leave the factory with the characteristics of stable and reliable quality. These components are transported to the construction site for assembly to form a complete building structure. Compared with the traditional construction method, the production process of precast components is more standardized and mechanized, so the quality is more stable and reliable. Wall panel precast components are used to assemble wall panels, while floor slab precast components are specifically used as floor slabs, and floor slab precast components have good load-bearing performance.

[0003] However, after the precast floor components are transported and placed on the roof beams of the underground garage, when adjacent precast floor components are joined, it is often necessary to manually fine-tune the position of the precast floor components. The precast floor components are heavy, and it is difficult for the staff to adjust them. Moreover, there are gaps due to loose connections between adjacent precast floor components. Therefore, it does not meet the existing requirements. For this reason, we propose a precast floor component for underground garage construction and its construction method. Summary of the Invention

[0004] The purpose of the present invention is to provide a precast floor component for underground garage construction and its construction method to solve the problems mentioned in the above background technique, that is, after the precast floor components are transported and placed on the roof beams of the underground garage, when adjacent precast floor components are joined, it is often necessary to manually fine-tune the position of the precast floor components. The precast floor components are heavy, and it is difficult for the staff to adjust them. Moreover, there are gaps due to loose connections between adjacent precast floor components.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A precast floor component for underground garage construction includes a plurality of precast floor slabs. The upper surface of the plurality of precast floor slabs is covered with a waterproof layer. The interior of the precast floor slab is hollow and is detachably installed with a reinforcement lining. The reinforcement lining is a honeycomb structure. The bottom of the precast floor slab is provided with an auxiliary moving precast plate. The auxiliary moving precast plate includes a bottom floor slab. The bottom floor slab is fixed to the bottom of the precast floor slab. Receiving grooves are provided at both ends of the bottom floor slab. A moving plate is slidably installed inside the receiving groove. A sliding groove is provided on the bottom surface of the receiving groove, and the sliding groove penetrates the bottom floor slab. A receiving hole is further provided at the end of the bottom floor slab. The receiving hole is located below the sliding groove and communicates with the sliding groove. A rolling support member is slidably installed inside the receiving hole and the sliding groove. The top end of the rolling support member is inserted into the bottom end interior of the moving plate.

[0006] Preferably, an assembly hole is provided on the bottom surface of the moving plate, and the top end of the rolling support is inserted into the assembly hole and is in interference fit with the moving plate.

[0007] Preferably, the rolling support includes two symmetrically distributed assembling rods, a clamping cover is fixed at the bottom end of each assembling rod, a supporting rolling ball is clamped between the two clamping covers, and the supporting rolling ball is in rolling contact with the two clamping covers.

[0008] Preferably, a floor slab connecting member is provided between two adjacent precast floor slabs and between two adjacent auxiliary moving precast floor slabs. Filling blocks are provided at both ends of the floor slab connecting member. The side surfaces of the filling blocks are attached to the sides of the precast floor slab and the auxiliary moving precast floor slab. Limiting clamping strips are fixed on both sides of the precast floor slab and the bottom floor slab, and positioning grooves are provided on both sides of the precast floor slab and the bottom floor slab.

[0009] Preferably, the floor slab connecting member includes two vertically symmetric positioning plates. Arc-shaped protrusions are provided on both sides of the two positioning plates. The arc-shaped protrusions are clamped inside the positioning grooves. A fixed connecting rod is fixed between the two positioning plates. A plurality of groups of vertically symmetric upper sliding connecting strips and lower sliding connecting strips are provided between the two positioning plates. The upper sliding connecting strips and the lower sliding connecting strips are penetrated by the fixed connecting rod and are slidably connected to the fixed connecting rod.

[0010] Preferably, an anti-detachment clamping strip is clamped between the upper sliding connecting strip and the lower sliding connecting strip in the same group. The anti-detachment clamping strip is fixed to the side surface of the adjacent precast floor slab. Two symmetrically positioned connecting card slots and docking slots are provided at the bottom of the upper sliding connecting strip and the top of the lower sliding connecting strip. The anti-detachment clamping strip is clamped inside the connecting card slot.

[0011] Preferably, positioning holes are provided on the upper surface of the upper sliding connecting strip and the lower surface of the lower sliding connecting strip. A return spring is provided inside the positioning holes, and the return spring is sleeved on the outside of the fixed connecting rod.

[0012] Preferably, a guiding inclined surface is provided between the docking slot and the adjacent connecting card slot. The connection between the side of the guiding inclined surface and the connecting card slot is rounded.

[0013] Preferably, limiting clamping strips are further fixed on both sides of the precast floor slab and the bottom floor slab. Two symmetrically positioned limiting slots are provided at the bottom of the positioning plate, the lower sliding connecting strip and the top of the upper sliding connecting strip. The limiting clamping strip is clamped inside the limiting slot.

[0014] A construction method for a floor slab precast member used in underground garage construction. The construction method includes the following steps: S1: Use a construction lifting tool to lift the precast floor slab and the auxiliary moving precast floor slab and transport them to the garage roof beam. S2: At this time, the rolling supports at both ends of the bottom floor slab are in contact with the garage beam, and the bottom floor slab relies on the support balls to rollingly contact the garage beam; S3: The staff push the precast floor slab and the bottom floor slab, causing the support balls to roll on the surface of the garage beam to adjust the actual positions of the precast floor slab and the bottom floor slab; S4: After the positions of adjacent precast floor slabs and bottom floor slabs are aligned, place the floor slab connecting piece between the adjacent precast floor slabs and bottom floor slabs; S5: Push one of the precast floor slab and the bottom floor slab towards the other precast floor slab and bottom floor slab until the sides of the adjacent precast floor slabs and bottom floor slabs are mutually adhered; S6: At this time, the anti - detachment clamping strip is clamped in the connection card slot between the upper sliding connection strip and the lower sliding connection strip. At the same time, the limit clamping strip restricts the positions of the upper sliding connection strip and the lower sliding connection strip, and the adjacent precast floor slabs and bottom floor slabs are fixed through the upper sliding connection strip, the lower sliding connection strip and the anti - detachment clamping strip; S7: Assemble all the floor slab prefabricated parts, and then fill the filler blocks between the ends of adjacent precast floor slabs; S8: Finally, cover the waterproof layer on the upper surface of the spliced floor slab prefabricated parts.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the floor slab prefabricated parts are constructed and installed in the present invention, the rolling supports inserted at the bottom of the moving plate are in contact with the garage beam. At this time, the support balls support the bottom floor slab, the moving plate and the precast floor slab, and can reduce the frictional resistance between the floor slab prefabricated parts and the garage beam. The staff can easily push the floor slab prefabricated parts and change the positions of the ends of the floor slab prefabricated parts, thereby adjusting the positions of the floor slab prefabricated parts, reducing the construction difficulty of the floor slab prefabricated parts, shortening the construction time and thus improving the construction efficiency.

[0016] 2. After the positions of two adjacent floor slab prefabricated parts are aligned in the present invention, the floor slab connecting piece is placed between the two precast floor slabs, and one of the precast floor slabs is pushed towards the other precast floor slab. During this process, the anti - detachment clamping strip fixed on the side of the precast floor slab squeezes and separates the mutually adhered upper sliding connection strip and the lower sliding connection strip and enters the inner side of the connection card slot. When the precast floor slab is adhered to the positioning plate, the upper sliding connection strip and the lower sliding connection strip are reset and clamp and fix the anti - detachment clamping strip. At the same time, the limit clamping strip limits the positions of the upper sliding connection strip and the lower sliding connection strip, realizing the connection between the sides of adjacent precast floor slabs, ensuring that there are no gaps between adjacent precast floor slabs and they do not shake with each other. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the whole of the present invention; Figure 2 Schematic diagram of the connection between precast floor slabs of the present invention; Figure 3 Schematic diagram of the connection between the bottom floor slab and the movable slab of the present invention; Figure 4 Schematic diagram of the end structure of the bottom floor slab of the present invention; Figure 5 Schematic diagram of the structure of the rolling support member of the present invention; Figure 6 Schematic diagram of the structure of the floor slab connecting member of the present invention; Figure 7 is Figure 6 Enlarged view of the structure at A in Figure 8 Schematic diagram of the connection structure between the upper sliding connection bar and the lower sliding connection bar of the present invention.

[0018] In the figure: 1, precast floor slab; 2, waterproof layer; 3, filling block; 4, auxiliary movable precast slab; 401, bottom floor slab; 402, movable slab; 403, storage groove; 404, sliding groove; 405, rolling support member; 4051, assembling rod; 4052, clamping cover; 4053, supporting rolling ball; 406, storage hole; 5, floor slab connecting member; 501, positioning plate; 502, fixed connecting rod; 503, upper sliding connection bar; 504, return spring; 505, positioning hole; 506, anti - detachment clamping bar; 507, limiting groove; 508, connection clamping groove; 509, guiding inclined surface; 510, docking groove; 511, lower sliding connection bar; 6, positioning groove; 7, limiting clamping bar; 8, reinforcing lining. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Such as Figures 1 to 5As shown in the figure, a floor precast member for underground garage construction includes a plurality of precast floors 1. The upper surface of the plurality of precast floors 1 is covered with a waterproof layer 2. The inside of the precast floor 1 is hollow and is detachably installed with a reinforcement lining 8. The reinforcement lining 8 is in a honeycomb structure. The bottom of the precast floor 1 is provided with an auxiliary moving precast plate 4. The auxiliary moving precast plate 4 includes a bottom floor 401. The bottom floor 401 is fixed to the bottom of the precast floor 1. Receiving grooves 403 are provided at both ends of the bottom floor 401. A moving plate 402 is slidably installed inside the receiving groove 403. A sliding groove 404 is provided on the bottom surface of the receiving groove 403. The sliding groove 404 penetrates through the bottom floor 401. A receiving hole 406 is further provided at the end of the bottom floor 401. The receiving hole 406 is located below the sliding groove 404 and communicates with the sliding groove 404. A rolling support member 405 is slidably installed inside the receiving hole 406 and the sliding groove 404. The top end of the rolling support member 405 is inserted into the bottom end inside of the moving plate 402. The rolling support member 405 is used to roll-support the precast floor 1, the bottom floor 401 and the garage roof beam, reducing the moving difficulty of the bottom floor 401 and the precast floor 1, and facilitating the staff to adjust the position of the floor precast member.

[0021] An assembly hole is provided on the bottom surface of the moving plate 402. The top end of the rolling support member 405 is inserted into the assembly hole and is in interference fit with the moving plate 402. The rolling support member 405 includes two symmetrically distributed assembly rods 4051. A clamping cover 4052 is fixed to the bottom end of the assembly rod 4051. A support rolling ball 4053 is clamped between the two clamping covers 4052. The support rolling ball 4053 is in rolling contact with the two clamping covers 4052. The frictional resistance between the rolling support rolling ball 4053 and the contacting object is small, facilitating the staff to push the floor precast member to move on the garage roof beam.

[0022] A floor connecting member 5 is provided between two adjacent precast floors 1 and two adjacent auxiliary moving precast plates 4. Filling blocks 3 are provided at both ends of the floor connecting member 5. The sides of the filling blocks 3 are attached to the sides of the precast floor 1 and the auxiliary moving precast plate 4. Positioning slots 6 are provided on both sides of the precast floor 1 and the bottom floor 401. Limit clamping strips 7 are fixed on both sides of the precast floor 1 and the bottom floor 401. The filling blocks 3 are used to fill the gaps between the ends of the floor connecting member 5 and the ends of the precast floor 1 and the auxiliary moving precast plate 4, avoiding voids after floor construction.

[0023] As Figure 2 、 Figures 6 to 8As shown in the figure, the floor slab connector 5 includes two symmetrically arranged positioning plates 501 up and down. Arc-shaped protrusions are provided on both sides of the two positioning plates 501. The arc-shaped protrusions are clamped inside the positioning grooves 6. A fixed connecting rod 502 is fixed between the two positioning plates 501. A plurality of groups of symmetrically arranged upper sliding connection strips 503 and lower sliding connection strips 511 are provided between the two positioning plates 501. The upper sliding connection strips 503 and the lower sliding connection strips 511 are penetrated by the fixed connecting rod 502 and are slidably connected to the fixed connecting rod 502. An anti-disengagement clamping strip 506 is clamped between the upper sliding connection strip 503 and the lower sliding connection strip 511 in the same group. The anti-disengagement clamping strip 506 is fixed to the side surface of the adjacent precast floor slab 1. Two symmetrically positioned connection clamping grooves 508 and docking grooves 510 are provided at the bottom of the upper sliding connection strip 503 and the top of the lower sliding connection strip 511. The anti-disengagement clamping strip 506 is clamped inside the connection clamping groove 508. By making the upper sliding connection strip 503 and the lower sliding connection strip 511 contact each other and clamp the anti-disengagement clamping strip 506, the connection and fixation of the two precast floor slabs 1 are realized. And after the upper sliding connection strip 503 contacts the positioning plate 501, the anti-disengagement clamping strip 506 will not disengage from between the upper sliding connection strip 503 and the lower sliding connection strip 511 without external intervention.

[0024] Positioning holes 505 are provided on the upper surface of the upper sliding connection strip 503 and the lower surface of the lower sliding connection strip 511. A return spring 504 is provided inside the positioning holes 505, and the return spring 504 is sleeved on the outer side of the fixed connecting rod 502. The upper sliding connection strip 503 and the lower sliding connection strip 511 are elastically supported by the return spring 504 to ensure that the upper sliding connection strip 503 and the lower sliding connection strip 511 in the same group are in contact with each other and clamp the anti-disengagement clamping strip 506, ensuring the stable connection between the adjacent sides of the precast floor slabs 1.

[0025] A guiding inclined surface 509 is provided between the docking groove 510 and the adjacent connection clamping groove 508. The connection between the side of the guiding inclined surface 509 and the connection clamping groove 508 is rounded. When the anti-disengagement clamping strip 506 is clamped into the connection clamping groove 508, it first contacts the guiding inclined surface 509. At this time, the anti-disengagement clamping strip 506 squeezes the upper sliding connection strip 503 and the lower sliding connection strip 511, causing the upper sliding connection strip 503 and the lower sliding connection strip 511 to slide along the axis of the fixed connecting rod 502 and move away from each other, facilitating the anti-disengagement clamping strip 506 to enter the inside of the connection clamping groove 508.

[0026] On both sides of the precast floor slab 1 and the bottom floor slab 401, there are also fixed limit clamping strips 7. Two symmetrically positioned limit slots 507 are provided at the bottom of the positioning plate 501, the bottom of the lower sliding connection strip 511, and the top of the upper sliding connection strip 503. The limit clamping strip 7 is clamped inside the limit slot 507. After the anti-disengagement clamping strip 506 is clamped into the inside of the connection clamping slot 508, the limit clamping strip 7 is inserted between the adjacent positioning plate 501 and the upper sliding connection strip 503 or between the upper sliding connection strip 503 and the lower sliding connection strip 511 to limit the positions of the upper sliding connection strip 503 and the lower sliding connection strip 511, so that the upper sliding connection strip 503 and the lower sliding connection strip 511 cannot slide along the axis of the fixed connecting rod 502, thereby ensuring the connection stability of the anti-disengagement clamping strip 506 and the floor slab connecting member 5 as a whole.

[0027] Working principle: First, the construction hoisting equipment of the staff binds and hoists the floor slab precast member, transports the floor slab precast member above the garage beam by using the hoisting equipment, and ensures that both ends of the floor slab precast member are lapped above the garage beam. The staff on the garage beam separates the floor slab precast member from the hoisting equipment. At this time, the floor slab precast member makes rolling contact with the garage beam through the support rolling balls 4053 at the bottom of the rolling support member 405. The staff only needs to push both ends of the precast floor slab 1 and the bottom floor slab 401 in the same direction at the same time to realize the pushing of the precast floor slab 1 and the bottom floor slab 401 until the precast floor slab 1 and the bottom floor slab 401 are moved to the designated positions. The rolling of the support rolling balls 4053 reduces the moving difficulty of the floor slab precast member and facilitates the staff to adjust according to the installation position of the floor slab precast member. After the previous floor slab precast member reaches the designated position, the floor slab precast member transported later to the garage beam is moved to the placement position of the previous floor slab precast member, and the position of the later-arriving floor slab precast member is adjusted according to the installation position of the floor slab precast member until the ends of the two floor slab precast members are flush with each other. At this time, the floor slab connecting member 5 is placed between the two floor slab precast members, and the arc-shaped protrusions on the side of the positioning plate 501 are aligned with the positioning grooves 6 on the sides of the precast floor slab 1 and the bottom floor slab 401. Push the later-arriving floor precast member towards the direction of the earlier-arriving floor precast member. During this process, the anti-disengagement clamping strip 506 enters the docking groove 510 and squeezes the guiding inclined surface 509, causing the adjacent upper sliding connection strip 503 and lower sliding connection strip 511 to separate from each other and compress the return spring 504 until the anti-disengagement clamping strip 506 passes through the connection between the guiding inclined surface 509 and the connection card slot 508. At this time, the return spring 504 elastically restores and the upper sliding connection strip 503 and lower sliding connection strip 511 at the top reset, so that the anti-disengagement clamping strip 506 is covered by the connection card slot 508. At this time, the upper sliding connection strip 503 and lower sliding connection strip 511 are in close contact with the sides of the precast floor 1 and the bottom floor 401, and the limit clamping strip 7 is clamped inside the limit groove 507 to limit the positions of the upper sliding connection strip 503 and lower sliding connection strip 511, realizing the connection and fixation of the sides of the two floor precast members; Repeat the above construction operations until all the floor precast members are installed. Next, strike the moving plate 402 at the end of the bottom floor 401 so that the moving plate 402 enters the interior of the receiving groove 403, and the rolling support member 405 slides inside the sliding groove 404 along with the moving plate 402 until the support roller 4053 at the bottom of the rolling support member 405 moves away from the garage roof beam and enters the interior of the receiving hole 406. At this time, the floor precast member drops and contacts the garage roof beam. At this time, the floor precast member is in sliding contact with the garage roof beam and is difficult to move, ensuring the stable connection between the floor precast member and the roof beam after construction. Finally, cover the waterproof material above the floor precast member to form the waterproof layer 2.

[0028] A construction method for floor precast members used in the construction of an underground garage, the construction method comprising the following steps: S1: Use a construction hoisting tool to lift the precast floor 1 and the auxiliary moving precast slab 4 and transport them to the garage roof beam; S2: At this time, the rolling support members 405 at both ends of the bottom floor 401 are in contact with the garage roof beam, and the bottom floor 401 relies on the support rollers 4053 to roll in contact with the garage roof beam; S3: The staff push the precast floor 1 and the bottom floor 401 to make the support rollers 4053 roll on the surface of the garage roof beam to adjust the actual positions of the precast floor 1 and the bottom floor 401; S4: After the adjacent precast floors 1 and bottom floors 401 are aligned, place the floor connecting member 5 between the adjacent precast floors 1 and bottom floors 401; S5: Push one of the precast floor 1 and the bottom floor 401 towards the direction of the other precast floor 1 and the bottom floor 401 until the sides of the adjacent precast floors 1 and bottom floors 401 are in close contact with each other; S6: At this time, the anti - detachment clamping strip 506 is clamped in the connection clamping groove 508 between the upper sliding connection strip 503 and the lower sliding connection strip 511. At the same time, the limit clamping strip 7 restricts the positions of the upper sliding connection strip 503 and the lower sliding connection strip 511. The fixation of adjacent precast floor slabs 1 and the bottom floor slab 401 is realized through the upper sliding connection strip 503, the lower sliding connection strip 511 and the anti - detachment clamping strip 506; S7: Carry out splicing and assembly on all floor slab prefabricated parts according to the above operations, and then fill the filling block 3 between the ends of adjacent precast floor slabs 1; S8: Finally, cover the waterproof layer 2 on the upper surface of the spliced floor slab prefabricated parts.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above - mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights involved.

Claims

1. A prefabricated floor slab for use in underground garage construction, comprising a plurality of prefabricated floor slabs (1), the upper surfaces of the plurality of prefabricated floor slabs (1) being covered with a waterproof layer (2), characterized in that: The interior of the prefabricated floor slab (1) is hollow and is detachably provided with a reinforcing lining (8), the reinforcing lining (8) being a honeycomb structure. An auxiliary movable prefabricated plate (4) is provided at the bottom of the prefabricated floor slab (1), the auxiliary movable prefabricated plate (4) comprising a bottom floor slab (401), the bottom floor slab (401) being fixed to the bottom of the prefabricated floor slab (1), both ends of the bottom floor slab (401) being provided with receiving grooves (403), the inner side of the receiving groove (403) being slidably provided with a movable plate (402), The bottom surface of the storage groove (403) is provided with a sliding groove (404), the sliding groove (404) passes through the bottom floor (401), and the end of the bottom floor (401) is also provided with a storage hole (406), the storage hole (406) is located below the sliding groove (404) and is connected to the sliding groove (404), and a rolling support member (405) is slidably installed inside the storage hole (406) and the sliding groove (404), and the top end of the rolling support member (405) is inserted into the bottom end of the movable plate (402).

2. The prefabricated floor slab for underground garage construction according to claim 1 is characterized in that: An assembly hole is provided on the bottom surface of the movable plate (402), and the top end of the rolling support member (405) is inserted into the assembly hole and is interference-fitted with the movable plate (402).

3. The prefabricated floor slab for underground garage construction according to claim 2 is characterized in that: The rolling support member (405) comprises two symmetrically distributed assembly rods (4051), a snap-on cover (4052) being fixed to the bottom end of the assembly rod (4051), a support ball (4053) being snap-on between the two snap-on covers (4052), and the support ball (4053) being in rolling contact with the two snap-on covers (4052).

4. The prefabricated floor slab for underground garage construction according to claim 3 is characterized in that: A floor slab connector (5) is provided between two adjacent prefabricated floor slabs (1) and two adjacent auxiliary movable prefabricated floor slabs (4), and filling blocks (3) are provided at both ends of the floor slab connector (5). The sides of the filling blocks (3) are in contact with the sides of the prefabricated floor slabs (1) and the auxiliary movable prefabricated floor slabs (4), and limiting clamping strips (7) are fixed on both sides of the prefabricated floor slabs (1) and the bottom floor slab (401), and positioning grooves (6) are provided on both sides of the prefabricated floor slabs (1) and the bottom floor slab (401).

5. The prefabricated floor slab for underground garage construction according to claim 4 is characterized in that: The floor slab connecting member (5) comprises two vertically symmetrical positioning plates (501), both sides of the two positioning plates (501) are provided with arc-shaped protrusions, and the arc-shaped protrusions are clamped in the inner side of the positioning groove (6), a fixed connecting rod (502) is fixed between the two positioning plates (501), and a plurality of groups of vertically symmetrical upper sliding connecting strips (503) and lower sliding connecting strips (511) are provided between the two positioning plates (501), and the upper sliding connecting strips (503) and the lower sliding connecting strips (511) are penetrated by the fixed connecting rod (502) and are slidably connected to the fixed connecting rod (502).

6. The prefabricated floor slab for underground garage construction according to claim 5, characterized in that: An anti-drop-off snap-on strip (506) is snap-connected between the upper sliding connection strip (503) and the lower sliding connection strip (511) of the same group. The anti-drop-off snap-on strip (506) is fixed to the side of the adjacent prefabricated floor slab (1). The bottom of the upper sliding connection strip (503) and the top of the lower sliding connection strip (511) are both provided with two symmetrically positioned connection slots (508) and a docking slot (510). The anti-drop-off snap-on strip (506) is snap-connected to the inner side of the connection slot (508).

7. The prefabricated floor slab for underground garage construction according to claim 6 is characterized by: The upper surface of the upper sliding connection bar (503) and the lower surface of the lower sliding connection bar (511) are both provided with positioning holes (505), and a return spring (504) is provided inside the positioning hole (505), and the return spring (504) is sleeved on the outside of the fixed connecting rod (502).

8. The prefabricated floor slab for underground garage construction according to claim 7 is characterized in that: A guiding inclined surface (509) is provided between the docking groove (510) and the adjacent connecting slot (508), and the connecting portion between the side edge of the guiding inclined surface (509) and the connecting slot (508) is rounded.

9. The prefabricated floor slab for underground garage construction according to claim 8, characterized in that: Limiting snap-fit ​​strips (7) are also fixed on both sides of the prefabricated floor slab (1) and the bottom floor slab (401); the positioning plate (501), the bottom of the lower sliding connection strip (511) and the top of the upper sliding connection strip (503) are all provided with two symmetrically positioned limiting grooves (507); the limiting snap-fit ​​strips (7) are snap-fitted to the inner sides of the limiting grooves (507).

10. The method for constructing a prefabricated floor slab for underground garage construction according to claim 9, characterized in that: The construction method comprises the following steps: S1: The construction lifting tool lifts the prefabricated floor slab (1) and the auxiliary movable prefabricated slab (4) and transports them to the garage beams; S2: At this time, the rolling support members (405) at the bottom of both ends of the bottom floor slab (401) are in contact with the garage beams, and the bottom floor slab (401) is in rolling contact with the garage beams by supporting the rolling balls (4053); S3: The staff pushes the prefabricated floor slab (1) and the bottom floor slab (401) so that the supporting rolling ball (4053) rolls on the surface of the garage beam, thereby adjusting the actual positions of the prefabricated floor slab (1) and the bottom floor slab (401); S4: After the adjacent prefabricated floor slabs (1) and the bottom floor slabs (401) are aligned, the floor slab connector (5) is placed between the adjacent prefabricated floor slabs (1) and the bottom floor slabs (401); S5: Pushing one of the prefabricated floor slabs (1) and the bottom floor slab (401) toward the other prefabricated floor slab (1) and the bottom floor slab (401) until the sides of the adjacent prefabricated floor slabs (1) and the bottom floor slab (401) are in contact with each other; S6: At this time, the anti-dropping snap-in strip (506) is snap-fitted into the connecting slot (508) between the upper sliding connecting strip (503) and the lower sliding connecting strip (511), and at the same time, the limiting snap-in strip (7) limits the position of the upper sliding connecting strip (503) and the lower sliding connecting strip (511), thereby fixing the adjacent prefabricated floor slabs (1) and the bottom floor slab (401) through the upper sliding connecting strip (503), the lower sliding connecting strip (511) and the anti-dropping snap-in strip (506); S7: splicing and assembling all the prefabricated floor slabs, and then filling the filling blocks (3) between the ends of adjacent prefabricated floor slabs (1); S8: Finally, a waterproof layer (2) is covered on the upper surface of the assembled prefabricated floor slab components.

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