Post-cast strip advanced sealing water stop device and construction method thereof

Abstract

The invention relates to the technical field of building construction, in particular to a post-cast strip advanced sealing water stop device and a construction method thereof.The post-cast strip advanced sealing water stop device comprises a building body, a prefabricated assembly and a bearing assembly.The post-cast strip advanced sealing water stop device and the construction method thereof are novel in structure and clear in thought, site construction and site procedure interpenetration are facilitated, and flowing water can be prevented from entering a garage; the construction of processes such as ceiling putty of an underground garage can be carried out in advance, waterproof construction of a top plate part of a post-cast strip can be carried out in advance, a construction elevator of the post-cast strip part can be mounted in advance, after the construction elevator is mounted, vertical material transportation can be carried out, and then on-site secondary structure and other processes can be carried out; the bottom frame body does not need to be independently erected, on-site material turnover is facilitated, after the strength of concrete in the post-cast strip reaches 100%, the temporary supporting columns are cut on site, so that the temporary supporting columns serve as lintels in a secondary structure, on-site lintel prefabrication is reduced, and material turnover use is achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a device for pre-sealing and water-stopping post-pouring strips and its construction method. Background Technology

[0002] In the construction of buildings, the post-settlement concrete strip on the garage roof is a common construction site. Before the strip is closed, it is an open structure. Currently, during the main structure construction, the post-settlement concrete strip needs to be separately formworked during the formwork construction. After the main building structure is capped, the closure time will be determined based on the settlement observation results. Once the settlement is stable and approved by the design, non-shrink concrete with a higher strength than the concrete of the side components will be poured. For buildings where the construction hoist is located at the post-settlement concrete strip, the foundation construction and hoist installation will be carried out after the post-settlement concrete strip is poured. The existing construction methods have the following problems: the post-pouring strip is a weak point where rainwater can easily flow into the garage; the ceiling plastering and other processes of the underground garage cannot be carried out in advance; the waterproofing of the top slab of the post-pouring strip cannot be carried out in advance; the construction hoist at the post-pouring strip cannot be installed in advance; if the construction hoist is installed late, vertical material transportation cannot be carried out, which will affect the scheduling of secondary structure and other processes on site; the scaffolding at the bottom of the settlement post-pouring strip needs to be erected separately, and this part of the scaffolding is not dismantled during the subsequent dismantling of the scaffolding, which is not conducive to the turnover of materials on site. Summary of the Invention

[0003] The purpose of this invention is to provide a device for pre-sealing and water-stopping post-pouring strips and its construction method, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for pre-sealing and water-stopping post-cast strips, comprising: The main building has a post-pouring strip. Several temporary support columns are vertically and symmetrically arranged near the lower end of the post-pouring strip. Several prefabricated components are erected on the main building above the post-pouring strip. Each prefabricated component includes a prefabricated cover plate, two positioning embedded plates and four embedded connecting rods. The prefabricated components are covered with a waterproof membrane and a concrete protective layer. The supporting component is installed below the post-cast strip of the building body via a hoisting component. The supporting component includes a bottom formwork and several timbers, and the hoisting component includes several hoisting rods and several bottom support steel pipes. The hoisting rods are combined and connected with several pre-embedded connecting rods.

[0005] Preferably, the positioning embedded plate is arranged in a U-shape, and two embedded connecting rods are vertically and symmetrically welded on both sides of the positioning embedded plate. The two positioning embedded plates are embedded in both sides of the precast cover plate, and the two sides of the positioning embedded plate and the two embedded connecting rods extend out of the lower end of the precast cover plate respectively.

[0006] Preferably, both ends of the positioning embedded plate extending from the precast cover plate and the embedded connecting rod are inserted into the upper part of the post-pouring strip. The distance between one end of the positioning embedded plate extending from the precast cover plate and the end of the precast cover plate is 10 centimeters, and both ends of the positioning embedded plate extending from the precast cover plate are in contact with the inner sidewall of the post-pouring strip.

[0007] Preferably, the precast cover plate has a pre-embedded pouring guide pipe at its center, the lower end of the pouring guide pipe is connected to the post-pouring strip, the waterproof membrane is laid on top of the main building and several post-pouring strips, the concrete protective layer is laid on top of the waterproof membrane, and the combined joint is set through the waterproof membrane and the concrete protective layer.

[0008] Preferably, the upper end of the lifting rod is provided with a combination joint, and the center of the combination joint is provided with an internal thread groove. The lower end of the pre-embedded connecting rod is provided with a combination external thread. The lifting rod is connected to the combination external thread of the pre-embedded connecting rod through the internal thread of the combination joint. A positioning strip groove is provided through the side of the pre-embedded connecting rod near the combination external thread. Two through holes are provided through the side of the combination joint near the positioning strip groove. A constraint pin is inserted through both through holes, and the constraint pin is set through the positioning strip groove.

[0009] Preferably, the bottom formwork is laid horizontally below the main building structure, and the lower ends of several hoisting rods are respectively installed through the bottom formwork.

[0010] Preferably, the lower end of the hoisting rod through the bottom template is fitted with a support plate, and the upper end of each support plate is provided with two horizontal guide sleeves. Two bottom support steel pipes are horizontally fitted on the two support plates on the same side through four guide sleeves.

[0011] Preferably, several timbers are horizontally arranged between the bottom template and the bottom support steel pipes, with the lower end of the timbers contacting the upper end of the bottom support steel pipes and the upper end of the timbers contacting the lower end of the bottom template, and the timbers and bottom support steel pipes are arranged in a cross pattern.

[0012] Preferably, the lower end of the guide sleeve inside the support tray is provided with a receiving groove, and a clamping block is movably inserted into each receiving groove. Two connecting rods are vertically provided at the lower end of each clamping block. The connecting rods movably pass through the lower end of the support tray and are provided with a synchronous plate. The lifting rod passes through the center of the support tray and the synchronous plate and is provided with a clamping external thread. A support nut is threadedly fitted onto the clamping external thread. The upper end of the support nut contacts the lower end of the synchronous plate, and the upper end of the clamping block is pressed into contact with the lower end of the bottom support steel pipe.

[0013] A construction method for a pre-sealing water-stop device for post-cast strips includes the following steps: Step 1: When the architectural design drawings are completed, the location of the temporary support columns is designed. The temporary support columns are constructed together with the formwork at the bottom of the garage top floor and the concrete is poured together. Step 2: Concrete precasting of the precast cover plate is carried out on site. At the same time, the welded and assembled positioning embedded plate, embedded connecting rod and pouring pipe are poured into the precast cover plate to form a whole. When placing the positioning embedded plate, the distance between the positioning embedded plate and both ends is kept at 10 centimeters. Step 3: Once the temporary support column reaches the required strength, dismantle the formwork of the temporary support column and the post-pouring strip, and install the precast cover plate. Insert one end of the precast cover plate into the post-pouring strip by extending the positioning embedded plate, so that the length of the precast cover plate overlapping the main building on both sides is 10 centimeters. Step 4: After the precast cover plate is placed, connect the lifting rod and the embedded connecting rod in the garage by combining external threads. Then, insert two constraint pins at the positioning slot to prevent the lifting rod and the embedded connecting rod from turning back and loosening. According to the distribution point of the lifting rod, drill corresponding through holes on the bottom template and make the lifting rod pass through the bottom template. Step 5: Take two bottom support steel pipes as a group, pass them through the four guide sleeves of the two support pallets respectively, then put the two support pallets under the two adjacent lifting rods respectively, and screw on the support nuts to prevent the support pallets from falling off the lifting rods. Then insert several wooden blocks between the bottom formwork and the bottom support steel pipes respectively, and make the wooden blocks and the bottom support steel pipes cross-shaped and the wooden blocks overlap at least two groups of bottom support steel pipes. Step Six: After the timber is placed, tighten the support nuts to push the synchronous plate and support tray upwards, pushing the bottom support steel pipe to squeeze the timber and bottom formwork, so that the bottom formwork is horizontally attached to the main building and covers the bottom of the post-pouring strip. When the bottom support steel pipe pushes the synchronous plate and support tray upwards, the synchronous plate push clamping block first contacts the bottom of the bottom support steel pipe and clamps it to prevent the bottom support steel pipe from moving axially. Before the clamping block clamps the bottom support steel pipe, the guide sleeve can slide with the bottom support steel pipe to facilitate the adjustment of the length of the bottom support steel pipe on both sides to adapt to the support of the timber and bottom formwork. Step 7: The waterproof membrane is laid directly on top of the main building and the precast cover plate, with a sloping transition structure at the location of the main building and the precast cover plate. Then, the concrete protective layer is poured on top of the main building and the waterproof membrane. Step 8: After the main building structure is capped, the closure time is determined based on the settlement observation results. After the settlement is stable and approved by the design, non-shrink concrete with a higher strength than the concrete of the two side components is poured. The concrete is then poured into the post-pouring strip through the pouring pipe, thus realizing the pouring of the post-pouring strip after settlement. After the concrete of the post-pouring strip is poured, a waterproof membrane is used to wrap the pouring pipe tightly, and mortar is used to protect the waterproof membrane around the pouring pipe and the top of the pouring pipe.

[0014] Step Nine: Finally, once the strength of the post-settlement concrete strip has reached the required level, the temporary support column will be cut on-site to serve as a lintel in the secondary structure for secondary structure construction.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This device and its construction method are novel in structure and clear in concept, facilitating on-site construction and allowing for the interleaving of on-site procedures. It can prevent water from entering the garage, allow for the early application of plastering to the underground garage ceiling, facilitate the early waterproofing of the top slab of the post-cast strip, and enable the early installation of the construction hoist at the post-cast strip. After the construction hoist is installed, vertical material transportation is possible, allowing for the interleaving of on-site secondary structure procedures. The bottom frame does not require separate erection, facilitating on-site material turnover. After the concrete strength in the post-cast strip reaches 100%, the temporary support columns are cut on-site to serve as lintels in the secondary structure, reducing the need for on-site lintel prefabrication and enabling the reuse of materials. Attached Figure Description

[0016] Figure 1 This is a first-view schematic diagram of the structure of the present invention; Figure 2 This is a second-view schematic diagram of the structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of part A; Figure 4 This is a schematic diagram of the structure of the casting conduit of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of part B; Figure 6 This is a schematic diagram of the distribution structure of the prefabricated cover plate of the present invention; Figure 7 This is a partial side sectional view of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of part C; Figure 9 This is a schematic diagram showing the connection between the prefabricated cover plate and the bottom support steel pipe of the present invention; Figure 10This is a schematic diagram showing the connection between the positioning embedded plate and the bottom support steel pipe of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of part D.

[0017] In the diagram: 1. Main building structure; 2. Post-pouring strip; 3. Temporary support column; 4. Precast cover plate; 5. Positioning embedded plate; 6. Embedded connecting rod; 7. Lifting rod; 8. Combined joint; 9. Positioning strip groove; 10. Restraining pin; 11. Waterproof membrane; 12. Concrete protective layer; 13. Pouring guide pipe; 15. Bottom formwork; 16. Support tray; 17. Storage groove; 18. Pressing block; 19. Connecting rod; 20. Synchronous plate; 21. Support nut; 22. Timber; 23. Guide sleeve; 24. Bottom support steel pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see the appendix Figures 1-11 This application provides the following technical solutions.

[0020] A pre-sealing water-stopping device for post-cast strips includes a main building 1 with a post-cast strip 2 on the main building 1. Several temporary support columns 3 are vertically and symmetrically arranged near the lower end of the main building 1 close to the post-cast strip 2. Several prefabricated components are erected above the main building 1 on the post-cast strip 2. Each prefabricated component includes a prefabricated cover plate 4, two positioning embedded plates 5, and four embedded connecting rods 6. The positioning embedded plates 5 are U-shaped. The two embedded connecting rods 6 are vertically and symmetrically welded to both sides of the positioning embedded plates 5. The two positioning embedded plates 5 are embedded inside the prefabricated cover plate 4 on both sides. The sides of the positioning embedded plates 5 and the two embedded connecting rods 6 are respectively... The lower end of the precast cover plate 4 extends out, and the two ends of the positioning embedded plate 5 extending out of the precast cover plate 4 and the embedded connecting rod 6 are all inserted into the upper part of the post-pouring strip 2. The distance between the end of the positioning embedded plate 5 extending out of the precast cover plate 4 and the end of the precast cover plate 4 is 10 centimeters. The two ends of the positioning embedded plate 5 extending out of the precast cover plate 4 are in contact with the inner side wall of the post-pouring strip 2 respectively. The two ends of the U-shaped structure of the positioning embedded plate 5 extend out of the lower end of the precast cover plate 4. When the precast cover plate 4 overlaps above the post-pouring strip 2, the overlap length between the precast cover plate 4 and the main building 1 can be quickly positioned, reducing the tediousness of repeated adjustments and improving the structural strength and stability after construction. If the precast components are covered with a waterproof membrane 11 and a concrete protective layer 12, a pouring conduit 13 is pre-embedded in the center of the precast cover plate 4. The lower end of the pouring conduit 13 is connected to the post-pouring strip 2. The waterproof membrane 11 is laid on top of the main building 1 and several post-pouring strips 2. The concrete protective layer 12 is laid on top of the waterproof membrane 11. The combination joint 8 is set through the waterproof membrane 11 and the concrete protective layer 12. The pouring conduit 13 is used for later concrete pouring in the post-pouring strip 2. When not in use, the pouring conduit 13 is covered with tape or packaging bag. The number of pouring conduits 13 can be determined according to the size of the precast cover plate 4. When the length of the precast cover plate 4 is long, a pouring conduit 13 can be set on each precast cover plate 4. When the length of the precast cover plate 4 is short, a pouring conduit 13 can be set every other precast cover plate 4. When making the precast cover plate 4, the number of pouring conduits 13 and precast cover plates 4 needs to be planned in advance.

[0021] The supporting component is installed below the post-cast strip 2 of the main building 1 via a hoisting component. The supporting component includes a bottom formwork 15 and several timber beams 22. The hoisting component includes several hoisting rods 7 and several bottom support steel pipes 24. The hoisting rods 7 are combined and connected with several embedded connecting rods 6. The upper end of the hoisting rod 7 is provided with a combination joint 8, and the center of the combination joint 8 is provided with an internal thread groove. The lower end of the embedded connecting rod 6 is provided with a combination external thread. The hoisting rod 7 is connected to the embedded connecting rod 6 through the internal thread of the combination joint 8 and the combination external thread of the embedded connecting rod 6. The pre-embedded connecting rod 6 has a positioning groove 9 through it on the side near the combined external thread. The combined joint 8 has two through holes through it on the side near the positioning groove 9. A constraint pin 10 is inserted through both through holes and passes through the positioning groove 9. The constraint pin 10 passes through the positioning groove 9. The lifting rod 7 and the pre-embedded connecting rod 6 are combined and connected by the combined external thread. Then, two constraint pins 10 are inserted at the positioning groove 9 to prevent the lifting rod 7 and the pre-embedded connecting rod 6 from reversing and loosening.

[0022] The bottom formwork 15 is laid horizontally below the main building 1. The lower ends of several hoisting rods 7 are respectively installed through the bottom formwork 15. The lower ends of the hoisting rods 7 through the bottom formwork 15 are fitted with support trays 16. The upper ends of the support trays 16 are each horizontally equipped with two guide sleeves 23. Two bottom support steel pipes 24 are horizontally fitted on the two support trays 16 on the same side through four guide sleeves 23. Several wooden blocks 22 are horizontally placed between the bottom formwork 15 and the bottom support steel pipes 24. The lower ends of the wooden blocks 22 are in contact with the upper ends of the bottom support steel pipes 24, and the upper ends of the wooden blocks 22 are in contact with the lower ends of the bottom formwork 15. The wooden blocks 22 and the bottom support steel pipes 24 are arranged in a cross pattern. The hoisting rods 7, together with the wooden blocks 22, support trays 16 and two bottom support steel pipes 24, can horizontally lift the bottom formwork 15 and attach it to the bottom of the main building 1.

[0023] The lower end of the guide sleeve 23 inside the support tray 16 is provided with a receiving groove 17. Each receiving groove 17 is movably inserted with a clamping block 18. Two connecting rods 19 are vertically mounted at the lower end of each clamping block 18. The connecting rods 19 movably pass through the lower end of the support tray 16 and together are provided with a synchronous plate 20. The lifting rod 7 passes through the center of the support tray 16 and the synchronous plate 20 and is provided with a clamping external thread. A support nut 21 is threadedly fitted onto the clamping external thread. The upper end of the support nut 21 contacts the lower end of the synchronous plate 20. The upper end of the clamping block 18 is in contact with the lower end of the bottom support steel pipe 24. Before the supporting nut 21 pushes the supporting tray 16 and the bottom support steel pipe 24 to squeeze the timber 22, the bottom support steel pipe 24 can be moved horizontally in the guide sleeve 23. As the supporting nut 21 is gradually raised, the supporting nut 21 will first apply a squeezing force to the synchronous plate 20. At this time, the synchronous plate 20 can provide squeezing force to the position of the bottom support steel pipe 24 in the guide sleeve 23 through the connecting rod 19 and the clamping block 18, so as to achieve the clamping limit of the bottom support steel pipe 24.

[0024] A construction method for a pre-sealing water-stop device for post-cast strips includes the following steps: Step 1: When the architectural design is completed, the location of temporary support column 3 is designed. Temporary support column 3 is constructed together with the formwork frame at the bottom of the garage top floor and concrete is poured together. Step 2: Concrete precasting of the precast cover plate 4 is carried out on site. At the same time, the welded and assembled positioning embedded plate 5, embedded connecting rod 6 and pouring pipe 13 are poured into the precast cover plate 4 to form a whole. When placing the positioning embedded plate 5, the distance between the positioning embedded plate 5 and both ends is kept at 10 centimeters. Step 3: When the strength of the temporary support column 3 reaches 100%, the formwork of the temporary support column 3 and the post-pouring strip 2 is removed, and the precast cover plate 4 is installed. The precast cover plate 4 is inserted into the post-pouring strip 2 by extending one end of the positioning embedded plate 5, so that the length of the precast cover plate 4 overlapping the main building 1 on both sides is 10 centimeters. Step 4: After the precast cover plate 4 is placed, the hoisting rod 7 and the embedded connecting rod 6 are connected in the garage by combining external threads. Then, two constraint pins 10 are inserted at the positioning slot 9 to prevent the hoisting rod 7 and the embedded connecting rod 6 from turning back and loosening. According to the distribution point of the hoisting rod 7, corresponding through holes are drilled on the bottom template 15 and the hoisting rod 7 is made to pass through the bottom template 15. Step 5: Take two bottom support steel pipes 24 as a group, pass them through the four guide sleeves 23 of the two support pallets 16 respectively, then put the two support pallets 16 under the two adjacent lifting rods 7 respectively, and screw on the support nuts 21 to prevent the support pallets 16 from falling off the lifting rods 7. Then insert several wooden blocks 22 between the bottom template 15 and the bottom support steel pipes 24 respectively, and make the wooden blocks 22 and the bottom support steel pipes 24 cross-shaped and the wooden blocks 22 overlap at least two groups of bottom support steel pipes 24; Step Six: After the timber 22 is placed, tighten the support nut 21 to push the synchronous plate 20 and the support tray 16 upward, and push the bottom support steel pipe 24 to squeeze the timber 22 and the bottom formwork 15, so that the bottom formwork 15 is horizontally attached to the main building 1 and covers the bottom of the post-pouring strip 2. When the bottom support steel pipe 24 pushes the synchronous plate 20 and the support tray 16 to rise, the synchronous plate 20 pushes the pressing block 18 to contact the bottom of the bottom support steel pipe 24 first, and bite the bottom of the bottom support steel pipe 24 to prevent the bottom support steel pipe 24 from moving axially. Before the pressing block 18 bites the bottom support steel pipe 24, the guide sleeve 23 can slide with the bottom support steel pipe 24 to facilitate the adjustment of the length of the bottom support steel pipe 24 on both sides to adapt to the support of the timber 22 and the bottom formwork 15. Step 7: The waterproof membrane 11 is laid directly on top of the main building 1 and the precast cover plate 4, with a sloping transition structure at the position of the main building 1 and the precast cover plate 4. Then, the concrete protective layer 12 is poured on top of the main building 1 and the waterproof membrane 11. Step 8: After the main building structure is capped, the closure time is determined based on the settlement observation results. After the settlement is stable and approved by the design, non-shrink concrete with a higher strength than the concrete of the two side components is poured. The concrete is then poured into the post-pouring strip 2 through the pouring pipe 13, thereby realizing the pouring of the post-pouring strip after settlement. After the concrete of the post-pouring strip 2 is poured, the pouring pipe 13 is wrapped tightly with a waterproof membrane 11, and the pouring pipe 13 and the top waterproof membrane 11 are protected with mortar.

[0025] Step Nine: Finally, when the strength of the post-settlement pouring strip 2 reaches the required level, the temporary support column 3 is cut on-site to serve as a lintel in the secondary structure for secondary structure construction, reducing the need for on-site lintel prefabrication and enabling material reuse.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for pre-sealing and water-stopping post-cast strips, characterized in that, include: The main building (1) is provided with a post-pouring strip (2). Several temporary support columns (3) are vertically and symmetrically provided at the lower end of the main building (1) near the post-pouring strip (2). Several prefabricated components are erected above the post-pouring strip (2) of the main building (1). Each prefabricated component includes a prefabricated cover plate (4), two positioning embedded plates (5) and four embedded connecting rods (6). The prefabricated components are covered with a waterproof membrane (11) and a concrete protective layer (12). The supporting component is installed on the main building (1) below the post-pouring strip (2) by a hoisting component. The supporting component includes a bottom formwork (15) and several timbers (22). The hoisting component includes several hoisting rods (7) and several bottom support steel pipes (24). The several hoisting rods (7) are combined and connected with several pre-embedded connecting rods (6).

2. The post-cast strip pre-sealing and water-stopping device according to claim 1, characterized in that: The positioning embedded plate (5) is U-shaped. Two embedded connecting rods (6) are vertically and symmetrically welded on both sides of the positioning embedded plate (5). The two positioning embedded plates (5) are embedded in the two sides of the precast cover plate (4). The two sides of the positioning embedded plate (5) and the two embedded connecting rods (6) extend out of the lower end of the precast cover plate (4).

3. The post-cast strip pre-sealing and water-stopping device according to claim 2, characterized in that: The two ends of the positioning embedded plate (5) extending out of the precast cover plate (4) and the embedded connecting rod (6) are both inserted into the upper part of the post-pouring strip (2). The distance between the end of the positioning embedded plate (5) extending out of the precast cover plate (4) and the end of the precast cover plate (4) is 10 centimeters, and the two ends of the positioning embedded plate (5) extending out of the precast cover plate (4) are in contact with the inner sidewall of the post-pouring strip (2).

4. The advanced sealing and water-stopping device for post-cast strips according to claim 3, characterized in that: The precast cover plate (4) is pre-embedded with a pouring guide pipe (13). The lower end of the pouring guide pipe (13) is connected to the post-pouring strip (2). The waterproof membrane (11) is laid on top of the main building (1) and several post-pouring strips (2). The concrete protective layer (12) is laid on top of the waterproof membrane (11). The combined joint (8) is set through the waterproof membrane (11) and the concrete protective layer (12).

5. The advanced sealing and water-stopping device for post-cast strips according to claim 4, characterized in that: The upper end of the hoisting rod (7) is provided with a combination joint (8), and the center of the combination joint (8) is provided with an internal thread groove. The lower end of the pre-embedded connecting rod (6) is provided with a combination external thread. The hoisting rod (7) is connected to the combination external thread of the pre-embedded connecting rod (6) through the internal thread of the combination joint (8). The pre-embedded connecting rod (6) is provided with a positioning strip groove (9) on the side near the combination external thread. The combination joint (8) is provided with two through holes on the side near the positioning strip groove (9). A constraint pin (10) is inserted through both through holes, and the constraint pin (10) is provided through the positioning strip groove (9).

6. The advanced sealing and water-stopping device for post-cast strips according to claim 5, characterized in that: The bottom formwork (15) is laid horizontally below the main building (1), and the lower ends of several hoisting rods (7) are respectively installed through the bottom formwork (15).

7. The advanced sealing and water-stopping device for post-cast strips according to claim 6, characterized in that: The hoisting rod (7) passes through the lower end of the bottom template (15) and is fitted with a support plate (16). The upper end of the support plate (16) is provided with two horizontal guide sleeves (23). On the two support plates (16) on the same side, two bottom support steel pipes (24) are horizontally fitted together by four guide sleeves (23).

8. The advanced sealing and water-stopping device for post-cast strips according to claim 7, characterized in that: Several timbers (22) are horizontally positioned between the bottom template (15) and the bottom support steel pipe (24). The lower end of the timber (22) is in contact with the upper end of several bottom support steel pipes (24), and the upper end of the timber (22) is in contact with the lower end of the bottom template (15). The timbers (22) and the bottom support steel pipes (24) are arranged in a cross pattern.

9. The post-cast strip pre-sealing and water-stopping device according to claim 8, characterized in that: The lower end of the guide sleeve (23) inside the bearing tray (16) is provided with a storage groove (17). Each storage groove (17) is movably inserted with a pressing block (18). Each pressing block (18) has two vertical connecting rods (19) at its lower end. Each connecting rod (19) movably passes through the lower end of the bearing tray (16) and is provided with a synchronous plate (20). The hoisting rod (7) passes through the center of the bearing tray (16) and the synchronous plate (20) and is provided with a pressing external thread. A support nut (21) is threaded onto the pressing external thread. The upper end of the support nut (21) contacts the lower end of the synchronous plate (20). The upper end of the pressing block (18) is pressed into contact with the lower end of the bottom support steel pipe (24).

10. A construction method for a post-cast strip pre-sealing water-stopping device as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: When the architectural design is completed, the location of the temporary support column (3) is designed. The temporary support column (3) is constructed together with the formwork frame at the bottom of the top floor of the garage and the concrete is poured together. Step 2: Concrete precasting of the precast cover plate (4) is carried out on site. At the same time, the welded and assembled positioning embedded plate (5), embedded connecting rod (6) and pouring pipe (13) are poured into the precast cover plate (4) to form a whole. When the positioning embedded plate (5) is placed, the distance between the positioning embedded plate (5) and both ends is kept at 10 cm. Step 3: When the temporary support column (3) reaches the required strength, dismantle the formwork of the temporary support column (3) and the post-pouring strip (2), and place the precast cover plate (4). Insert one end of the precast cover plate (4) through the positioning embedded plate (5) into the post-pouring strip (2) so that the length of the precast cover plate (4) overlapping the main building (1) on both sides is 10 centimeters. Step 4: After the precast cover plate (4) is placed, the hoisting rod (7) and the embedded connecting rod (6) are connected in the garage by combining external threads. Then, two constraint pins (10) are inserted at the positioning slot (9) to prevent the hoisting rod (7) and the embedded connecting rod (6) from reversing and loosening. According to the distribution point of the hoisting rod (7), corresponding through holes are drilled on the bottom template (15) and the hoisting rod (7) passes through the bottom template (15). Step 5: Take two bottom support steel pipes (24) as a group, pass them through the four guide sleeves (23) of the two support trays (16) respectively, then put the two support trays (16) under the two adjacent lifting rods (7) respectively, and screw on the support nuts (21) to prevent the support trays (16) from falling off the lifting rods (7). Then insert several wooden blocks (22) between the bottom template (15) and the bottom support steel pipes (24) respectively, and make the wooden blocks (22) and the bottom support steel pipes (24) cross-shaped and the wooden blocks (22) overlap at least two groups of bottom support steel pipes (24). Step Six: After the timber (22) is placed, further tighten the support nut (21) to push the synchronous plate (20) and the support tray (16) upward, pushing the bottom support steel pipe (24) to squeeze the timber (22) and the bottom formwork (15), so that the bottom formwork (15) is horizontally attached to the main building (1) and covers the bottom of the post-pouring strip (2). When the bottom support steel pipe (24) pushes the synchronous plate (20) and the support tray (16) to rise... The synchronous plate (20) pushes the pressing block (18) to contact the bottom of the bottom support steel pipe (24) first, and bites the bottom of the bottom support steel pipe (24) to prevent the bottom support steel pipe (24) from moving axially. Before the pressing block (18) bites the bottom support steel pipe (24), the bottom support steel pipe (24) can be guided and slid by the guide sleeve (23) to facilitate the adjustment of the length of the bottom support steel pipe (24) on both sides to adapt to the support of the timber (22) and the bottom template (15). Step 7: The waterproof membrane (11) is laid directly on top of the main building (1) and the precast cover plate (4). The main building (1) and the precast cover plate (4) are sloped transition structures. Then, the concrete protective layer (12) is poured on top of the main building (1) and the waterproof membrane (11). Step 8: After the main building structure is capped, the closure time is determined based on the settlement observation results. After the settlement is stable and approved by the design, non-shrink concrete with a higher strength than the concrete of the two side components is poured. The concrete is poured into the post-pouring strip (2) through the pouring pipe (13), thereby realizing the pouring of the post-pouring strip after settlement. After the concrete of the post-pouring strip (2) is poured, the pouring pipe (13) is wrapped tightly with a waterproof membrane (11), and the pouring pipe (13) and the top waterproof membrane (11) are protected with mortar. Step 9: Finally, when the strength of the post-settlement pouring strip (2) reaches the required level, the temporary support column (3) is cut on site so that it can be used as a lintel in the secondary structure for secondary structure construction.

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