A prefabricated composite slab waterproof system for prefabricated buildings and a construction process

Abstract

The application discloses a kind of precast construction composite board waterproof system and construction technology, including pre-embedded in the corresponding position of composite board pre-embedded body and for connecting the waterproof component of corresponding pre-embedded body on two composite boards, pre-embedded body is provided with T-shaped groove and the opening of T-shaped groove is front big rear small structure, the both ends of waterproof component are respectively provided with the waterproof head of connecting corresponding T-shaped groove and the waterproof body portion of connecting two head, the inside of waterproof body portion is provided with flexible support, when two composite boards corresponding position is adhered, flexible support acts waterproof body portion and keeps stable state by bending outward, while waterproof body portion pulls two waterproof heads and each other close.In the stable state when two composite boards are assembled, the both ends of waterproof head are pulled, so that waterproof head is tightly butted on the inner wall of pre-embedded body to form waterproof structure, and the waterproof effect is better, while the gap is also smaller, almost realizes "seamless".

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laminated slab construction technology, more particularly to a prefabricated laminated slab waterproof system for prefabricated building and a construction process. BACKGROUND

[0002] Prefabricated reinforced concrete structure is one of the important directions of the development of building structure in China, which is conducive to the development of building industrialization in China, improves production efficiency, saves energy, develops green and environmentally friendly buildings, and is conducive to improving and ensuring the quality of construction engineering. Compared with cast-in-place construction method, prefabricated PC structure is conducive to green construction, because prefabricated construction can better meet the requirements of green construction such as land saving, energy saving, material saving, water saving and environmental protection, reduce the negative impact on the environment, including reducing noise, preventing dust, reducing environmental pollution, clean transportation, reducing site interference, saving water, electricity, materials and other resources and energy, and following the principle of sustainable development.

[0003] Most of the existing prefabricated construction adopts prefabricated laminated slab + post-poured concrete construction process, through the installation of embedded steel bars exposed on the top of prefabricated laminated slab and post-poured concrete steel bars, pouring concrete on the laminated slab, and through the binding of the embedded steel bars exposed on the side of two adjacent prefabricated laminated slabs and the treatment of the spliced joints and nodes of the laminated slab by using mesh cloth and expanded concrete. Due to the existence of various objective reasons of the splicing and joint construction technology at present, the prefabricated laminated slab will still have different degrees of cracking and water seepage at the splicing joint. SUMMARY

[0004] 1. Technical problems to be solved by the present application

[0005] In view of the defects and deficiencies of the prior art, the present application provides a prefabricated laminated slab waterproof system for prefabricated building and a construction process. The present application uses waterproof components and embedded bodies to form a stable waterproof structure. Specifically, the waterproof head of the waterproof component is inserted into the interior of the embedded body, and the waterproof body and the flexible support inside the embedded body are used to enable the two laminated slabs to be in a stable state when assembled, and the waterproof head at both ends is pulled in this state, so that the waterproof head tightly abuts on the inner wall of the embedded body to form a waterproof structure. In this state, the waterproof head is reversely pressed on the inner wall of the embedded body, the waterproof effect is better, and the gap is smaller, almost achieving "seamless".

[0006] 2. Technical solutions

[0007] To achieve the above-mentioned purposes, the technical solutions provided by the present application are as follows:

[0008] The application discloses a prefabricated composite slab waterproof system for prefabricated buildings, which comprises a pre-embedded body embedded in a composite slab and a waterproof component used for connecting corresponding pre-embedded bodies on two composite slabs.

[0009] The waterproof head comprises waterproof structure one and waterproof structure two which are both arc-shaped elastic sheets, the free ends of the waterproof structure one and the waterproof structure two are connected with a flexible pressure applying body, the waterproof structure one is installed at the end of the waterproof body, and the flexible pressure applying body, the waterproof structure one and the waterproof structure two are sequentially reduced in the ability of stress deformation.

[0010] The waterproof structure one and the waterproof structure two are symmetrically connected with two groups of flexible support main bodies, the waterproof body is connected with a flexible support auxiliary body, the connecting node of the flexible support auxiliary body and the waterproof structure one is located between the connecting node of the waterproof structure one and the flexible pressure applying body and the connecting node of the waterproof structure one and the flexible support main body, and the flexible support auxiliary body is smaller than the waterproof structure one in the ability of stress deformation.

[0011] The flexible support body comprises a plurality of support sheets arranged in a layout of long in the middle and short on both sides, when the two composite slabs are attached at the corresponding positions, the flexible support body in the inside is changed from the curved state to the stable linear state, at this time, the waterproof body is a stable waist-shaped structure curved outward, and the waterproof body is a rectangular structure in the free state and the flexible support body in the inside is in the curved state.

[0012] The application discloses a prefabricated composite slab waterproof system for prefabricated buildings, which comprises a pre-embedded body embedded in a composite slab and a waterproof component used for connecting corresponding pre-embedded bodies on two composite slabs.

[0013] The end of the waterproof head and the waterproof body part is connected through a circular arc, an outward expansion body is connected between the inner wall of the waterproof head and the outer wall of the waterproof body part, the outward expansion body is arranged close to the end of the waterproof head and the waterproof body part, a supporting rigid body for pushing the end structure of the waterproof body part is arranged on the inner side of the waterproof body part, and two groups of flexible supporting bodies are symmetrically arranged on the two sides of the supporting rigid body.

[0014] The waterproof body part comprises a body segment one, a body segment two and a body segment three, the body segment one and the body segment two and the body segment three are connected, the waterproof head is connected with the body segment three, the outward expansion body, the body segment one and the body segment two gradually decrease in stress deformation capacity, the stress deformation capacity of the body segment three is between the stress deformation capacity of the outward expansion body and the body segment one, and when the two laminated boards are attached at the corresponding positions and the inner side of the body segment two is blocked to bend outward and is in a stable state, the two groups of flexible supporting bodies are converted from the bending state to the stable linear state.

[0015] Further, the T-shaped groove root of the pre-embedded body is provided with a spherical pressure structure extending to the T-shaped groove middle line root, and the spherical pressure structure acts on the body segment one.

[0016] Further, the pre-embedded body is provided with a positioning hole and a positioning pin, and the positioning hole on one pre-embedded body is matched with the positioning pin on another pre-embedded body.

[0017] A construction process of a laminated board waterproof system for prefabricated buildings, comprising the following steps:

[0018] Step one: measurement and line laying, horizontal control line laying and elevation control line laying, arrangement of vertical control points and elevation control points;

[0019] Step two: quickly positioning the temporary steel pipe support, before hoisting the laminated board and the laminated beam, quickly erecting the temporary support by using a laser level;

[0020] Step three: hoisting the laminated beam and the laminated board in place, adjusting and fixing the laminated beam and the laminated board;

[0021] Step four: cleaning the surface of the laminated beam and the laminated board, adjusting the positions of the two laminated boards left and right or front and back, and connecting the pre-embedded body and the waterproof component for matching, and completing the construction of the laminated board without post-poured splicing joint;

[0022] Step five: after completing the pipeline laying and the reinforcement laying, erecting the lateral formwork and pouring the concrete.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0025] The waterproof structure is formed by assembling the waterproof member and the pre-embedded body, specifically, the waterproof head of the waterproof member is inserted into the pre-embedded body, the waterproof body and the flexible support body inside the pre-embedded body are used, and the two laminated boards can be in a stable state when assembled, the waterproof head at both ends is pulled in this state, the waterproof head is tightly abutted on the inner wall of the pre-embedded body to form a waterproof structure, the waterproof head is reversely pressed on the inner wall of the pre-embedded body in this state, the waterproof effect is better, the gap is smaller, and the "seamless" is almost achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the whole structure of the embodiment 1 of the present application;

[0027] Figure 2 It is a schematic structural diagram of the waterproof member in the natural state of the embodiment of the present application; Figure 1

[0028] Figure 3 It is a schematic structural diagram of the two laminated boards connected of the embodiment of the present application; Figure 1

[0029] Figure 4 It is a schematic structural diagram of the whole structure of the embodiment 2 of the present application;

[0030] Figure 5 It is a schematic structural diagram of the waterproof member in the natural state of the embodiment of the present application; Figure 4

[0031] Figure 6 It is a schematic structural diagram of the two laminated boards connected of the embodiment of the present application; Figure 4

[0032] Figure 7 It is a schematic structural diagram of the whole structure of the embodiment 3 of the present application;

[0033] Figure 8 It is a schematic structural diagram of the waterproof member in the natural state of the embodiment of the present application; Figure 7

[0034] Figure 9 It is a schematic structural diagram of the two laminated boards connected of the embodiment of the present application. Figure 7

[0035] ​​​​​​In the figure: 10, embedded body; 11, T-shaped groove; 12, spherical pressure structure; 20, waterproof member; 21, waterproof head; 211, waterproof structure one; 212, waterproof structure two; 213, flexible pressure body; 214, flexible support main body; 22, waterproof body part; 221, body section one; 222, body section two; 223, body section three; 23, flexible support body; 24, flexible support auxiliary body; 25, outward expansion body; 26, support rigid body; 30, positioning hole; 40, positioning pin. DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the drawings and examples:

[0037] Example 1

[0038] From Figures 1-3 It can be seen that the precast fabricated building laminated slab waterproof system of the embodiment comprises an embedded body 10 embedded in the laminated slab and a waterproof member 20 for connecting corresponding embedded bodies 10 on two laminated slabs, the embedded body 10 is provided with a T-shaped groove 11, and the opening of the T-shaped groove 11 is large in front and small at the back, which facilitates the entry of the waterproof member 20, the two ends of the waterproof member 20 are respectively provided with a waterproof head 21 connected with the corresponding T-shaped groove 11 and a waterproof body part 22 connected with the two waterproof heads 21, the inside of the waterproof body part 22 is provided with a flexible support body 23, when the two laminated slabs are attached at the corresponding positions, the flexible support body 23 acts on the waterproof body part 22 to bend outward and maintain a stable state, and at the same time, the waterproof body part 22 pulls the two waterproof heads 21 close to each other.

[0039] In use, by the mutual approach of the two laminated slabs, the waterproof heads 21 at both ends are forced to enter the corresponding T-shaped grooves 11 first, as the distance between the two laminated slabs continues to approach, the waterproof body part 22 will be forced to deform, due to the presence of the flexible support body 23 inside, a resistance effect is generated on the inside of the waterproof body part 22 by the flexible support body 23, so that the waterproof body part 22 bends and deforms outward, and then the flexible support body 23 inside will automatically straighten to maintain a certain rigidity, so that the state of the waterproof body part 22 at this time is a stable state, and thus the waterproof head 21 always has a pulling force outward, and finally the waterproof head 21 is tightly abutted on the inner wall of the T-shaped groove 11, and the waterproof effect is excellent.

[0040] The waterproof head 21 comprises waterproof structure one 211 and waterproof structure two 212 which are both arc-shaped elastic sheets, the free ends of the waterproof structure one 211 and the waterproof structure two 212 are jointly connected with a flexible pressure body 213, the waterproof structure one 211 is installed at the end of the waterproof body part 22, and the flexible pressure body 213, the waterproof structure one 211 and the waterproof structure two 212 decrease in turn in the ability to deform under stress.

[0041] The waterproof structure one 211 and the waterproof structure two 212 adopt an arc-shaped elastic sheet type structure, thereby facilitating the end portions of the waterproof structure one 211 and the waterproof structure two 212 to abut against the inner wall of the T-shaped groove 11 when the waterproof head 21 is pulled outward by the waterproof body 22, and a flexible pressure body 213 is arranged between the end portions of the waterproof structure one 211 and the waterproof structure two 212 to provide an outward pushing force to the end portions of the waterproof structure one 211 and the waterproof structure two 212, further ensuring that the end portions of the waterproof structure one 211 and the waterproof structure two 212 are tightly abutted against the inner wall of the T-shaped groove 11, and the waterproof effect is further improved.

[0042] After the waterproof head 21 enters the inside of the T-shaped groove 11, the waterproof structure one 211 is in a free arc-shaped state, and the waterproof structure two 212 is in a bent deformed state. When the waterproof body 22 pulls the waterproof structure one 211 outward, the middle portion of the waterproof structure one 211 is outwardly deviated, so that the end portion of the waterproof structure one 211 abuts against the inner wall of the T-shaped groove 11, and the end portion of the waterproof structure one 211 is deviated to the two sides, thereby forcing the flexible pressure body 213 to be in a bent state and in an energy storage posture. When the energy is stored, the end portion of the waterproof structure two 212 is outwardly pushed to offset the change in the deformation amount of the middle portion of the waterproof structure one 211 when it is outwardly deviated.

[0043] Embodiment 2

[0044] From Figures 4-6 It can be seen that the precast assembly type building composite slab waterproof system of the embodiment has two groups of flexible support main bodies 214 symmetrically connected between the waterproof structure one 211 and the waterproof structure two 212, and a flexible support auxiliary body 24 connected between the waterproof body 22 and the waterproof structure one 211. The connection node of the flexible support auxiliary body 24 and the waterproof structure one 211 is located between the connection node of the waterproof structure one 211 and the flexible pressure body 213 and the connection node of the waterproof structure one 211 and the flexible support main body 214, and the deformation capacity of the flexible support auxiliary body 24 under stress is smaller than the deformation capacity of the waterproof structure one 211 under stress.

[0045] In a free state, the flexible support main body 214 is in a bent state, and after the waterproof structure one 211 is pulled outwardly and stably, the flexible support main body 214 is in a linear state and has a certain rigidity. At this time, the flexible support auxiliary body 24 can complete the energy storage when the waterproof body 22 is outwardly bent and deformed, so that part of the waterproof structure one 211 abuts against the T-shaped groove 11, but still maintains close contact, and the energy storage capacity of the flexible pressure body 213 is increased, so that the abutting force of the end portion of the waterproof structure two 212 against the T-shaped groove 11 is greatly increased.

[0046] The flexible support body 23 comprises a plurality of support sheets arranged in a layout of long in the middle and short on both sides. When the two laminated boards are attached at the corresponding positions, the internal flexible support body 23 changes from a curved state to a stable linear state. At this time, the waterproof body part 22 is a stable waist-shaped structure curved outward. In the free state, the waterproof body part 22 is a rectangular structure and the internal flexible support body 23 is in a curved state.

[0047] Embodiment 3

[0048] From Figures 7-9 It can be seen that the prefabricated composite board waterproof system of the embodiment has a waterproof head part 21 and a waterproof body part 22. The end portions of the waterproof head part 21 and the waterproof body part 22 are connected by a circular arc transition. The inner wall of the waterproof head part 21 and the outer wall of the waterproof body part 22 are connected with an outward expansion body 25. The outward expansion body 25 is arranged close to the end portions of the waterproof head part 21 and the waterproof body part 22. The inner side of the waterproof body part 22 is provided with a support rigid body 26 for pushing the end structure of the waterproof body part 22. The flexible support body 23 is provided with two groups and is symmetrically arranged on both sides of the support rigid body 26.

[0049] The waterproof body part 22 comprises a body section one 221, a body section two 222, and a body section three 223. The body section one 221, the body section two 222, and the body section three 223 are connected. The waterproof head part 21 is connected with the body section three 223. The outward expansion body 25, the body section one 221, and the body section two 222 have gradually decreasing deformation capacity under stress. The deformation capacity under stress of the body section three 223 is between that of the outward expansion body 25 and the body section one 221. When the two laminated boards are attached at the corresponding positions and the inner side of the body section two 222 is blocked from outward bending and is in a stable state, the two groups of flexible support bodies 23 change from a curved state to a stable linear state.

[0050] The root of the T-shaped groove 11 of the embedded body 10 is provided with a spherical pressure structure 12 extending to the middle root of the T-shaped groove 11. The spherical pressure structure acts on the body section one 221.

[0051] In the natural state, the end of the waterproof head 21 and the waterproof body 22 are in an outwardly bulging arc shape. After entering the T-shaped groove 11 through the waterproof head 21, the arc of the two will increase and be in a deformed state. At this time, the end of the internal waterproof head 21 will abut against the force deformation ability of the arc transition section between the body section three 223 in the inner wall of the T-shaped groove 11. As the composite slab approaches each other, the body two 222 bends outwardly under the action of the internal flexible support 23 and is in a stable waist-shaped structure. The internal flexible support 23 changes from a bending state to a linear state with a certain rigidity, so that the distance between the two waterproof heads 21 decreases. Since the internal rigid support 26 will top the two body section three 223, the bending degree of the body section three 223 further increases, and the deformation amount of the body section one 221 further increases. At the same time, due to the increase in the bending amount of the body section three 223, the end position will move to the middle and rear, so that the end of the body section three 223 is wrapped outside the spherical pressure structure 12. The distance between the end of the body section three 223 and the end of the waterproof head 21 also decreases appropriately, and the bending amount of the arc transition section increases appropriately, so that the end of the waterproof head 21 abuts against the inner wall of the T-shaped groove 11 with further improved force, and the waterproof effect is further improved.

[0052] The pre-embedded body 10 is provided with a positioning hole 30 and a positioning pin 40. The positioning hole 30 on one pre-embedded body 10 is matched with the positioning pin 40 on another pre-embedded body 10. The matching of the positioning pin 40 and the positioning hole 30 can ensure the flatness of the bottom when the composite slab is spliced.

[0053] A construction process of a prefabricated composite slab waterproof system for prefabricated buildings, comprising the following steps:

[0054] Step one: measure and lay out, perform horizontal control and elevation control, and arrange vertical control points and elevation control points;

[0055] Step two: quickly position the temporary steel pipe support, and quickly set up the temporary support using a laser level before hoisting the composite slab and the composite beam;

[0056] Step three: hoist and position the composite beam and the composite slab, and adjust and fix the composite beam and the composite slab;

[0057] Step four: clean the surface of the composite beam and the composite slab, adjust the positions of the two composite slabs left and right or front and back, and connect and match through the pre-embedded body 10 and the waterproof component 20. The waterproof head 21 of the pre-embedded body 10 is pulled and abuts against the inside of the T-shaped groove 11 under the action of the waterproof body 22, so that the internal waterproof ability is greatly improved. Through the matching of the positioning pin 40 and the positioning hole 30, the precise positioning and installation are completed, and the composite slab non-post-cast splicing joint construction is completed.

[0058] Step five: after laying pipeline and arranging steel bars, erect lateral formwork and pour concrete.

[0059] The present application carries out waterproof treatment at the splicing joint by the waterproof member and the pre-embedded body, and does not produce the post-poured splicing joint, fundamentally solves the water seepage problem caused by the cracking of the post-poured splicing joint.

[0060] The waterproof member and the pre-embedded body are assembled to form a stable waterproof structure, specifically, the waterproof head of the waterproof member is inserted into the pre-embedded body, and the waterproof body and the flexible support body inside the pre-embedded body are used, so that the two laminated boards can be in a stable state when assembled, and the waterproof head at both ends is pulled in this state, so that the waterproof head is tightly abutted on the inner wall of the pre-embedded body to form a waterproof structure, and the waterproof head is reversely pressed on the inner wall of the pre-embedded body in this state, so that the waterproof effect is better, and the gap is smaller, and almost achieves "seamless".

[0061] The above describes the present application and its embodiments in a schematic manner, and the description is not limited, and the shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, similar structure modes and embodiments are not creatively designed, which should belong to the protection scope of the present application.

Claims

1. A waterproofing system for prefabricated composite slabs in prefabricated buildings, comprising embedded bodies (10) in the composite slabs and waterproofing components (20) for connecting corresponding embedded bodies (10) on two composite slabs, characterized in that: The pre-embedded body (10) is provided with a T-shaped groove (11) and the opening of the T-shaped groove (11) is a structure with a larger front and a smaller back. The two ends of the waterproof component (20) are respectively provided with a waterproof head (21) connecting the corresponding T-shaped groove (11) and a waterproof body (22) connecting the two waterproof heads (21). The interior of the waterproof body (22) is provided with a flexible support (23). When the two composite plates are attached at the corresponding positions, the flexible support (23) causes the waterproof body (22) to bend outward and maintain a stable state. At the same time, the waterproof body (22) pulls the two waterproof heads (21) closer to each other. The waterproof head (21) includes a waterproof structure one (211) and a waterproof structure two (212), both of which are arc-shaped elastic sheets. The free ends of the waterproof structure one (211) and the waterproof structure two (212) are connected to a flexible pressure body (213). The waterproof structure one (211) is installed at the end of the waterproof body part (22). The ability of the flexible pressure body (213), the waterproof structure one (211), and the waterproof structure two (212) to deform under force decreases in sequence. Two sets of flexible support bodies (214) are symmetrically connected between the waterproof structure one (211) and the waterproof structure two (212). A flexible support sub-body (24) is connected between the waterproof body part (22) and the waterproof structure one (211). The connection node between the flexible support sub-body (24) and the waterproof structure one (211) is located between the connection node between the waterproof structure one (211) and the flexible pressure body (213) and the connection node between the waterproof structure one (211) and the flexible support body (214). The deformation capacity of the flexible support sub-body (24) under stress is less than that of the waterproof structure one (211). The flexible support (23) includes several support sheets, which are arranged in a layout with the middle being longer and the sides being shorter. When the two composite plates are attached at corresponding positions, the internal flexible support (23) changes from a bent state to a stable linear state. At this time, the waterproof body (22) is a stable waist-shaped structure that bends outward. In the free state, the waterproof body (22) is a rectangular structure and the internal flexible support (23) is in a bent state.

2. A waterproofing system for prefabricated composite slabs in prefabricated buildings, comprising embedded bodies (10) in the composite slabs and waterproofing components (20) for connecting corresponding embedded bodies (10) on two composite slabs, characterized in that: The pre-embedded body (10) is provided with a T-shaped groove (11) and the opening of the T-shaped groove (11) is a structure with a larger front and a smaller back. The two ends of the waterproof component (20) are respectively provided with a waterproof head (21) connecting the corresponding T-shaped groove (11) and a waterproof body (22) connecting the two waterproof heads (21). The interior of the waterproof body (22) is provided with a flexible support (23). When the two composite plates are attached at the corresponding positions, the flexible support (23) causes the waterproof body (22) to bend outward and maintain a stable state. At the same time, the waterproof body (22) pulls the two waterproof heads (21) closer to each other. The ends of the waterproof head (21) and the waterproof body (22) are connected by an arc. An expansion body (25) is connected between the inner wall of the waterproof head (21) and the outer wall of the waterproof body (22). The expansion body (25) is arranged close to the ends of the waterproof head (21) and the waterproof body (22). A supporting rigid body (26) for pushing the end structure of the waterproof body (22) is provided on the inner side of the waterproof body (22). Two sets of flexible support bodies (23) are provided and symmetrically arranged on both sides of the supporting rigid body (26). The waterproof body (22) includes body segment one (221), body segment two (222), and body segment three (223). Body segment one (221) is connected to body segment two (222) and body segment three (223). The waterproof head (21) is connected to body segment three (223). The deformation capacity of the outer expansion body (25), body segment one (221), and body segment two (222) gradually decreases. The deformation capacity of body segment three (223) is between that of the outer expansion body (25) and body segment one (221). When the corresponding positions of the two composite plates are attached and the inner side of body segment two (222) is blocked and bent outward, it is in a stable state. The two sets of flexible supports (23) change from the bent state to a stable linear state.

3. The waterproofing system for prefabricated assembled buildings using composite slabs according to claim 2, characterized in that: The T-slot (11) of the pre-embedded body (10) is provided with a spherical pressure structure (12) extending to the root of the center line of the T-slot (11), and the spherical pressure structure acts on the body segment one (221).

4. The waterproofing system for prefabricated assembled buildings using composite slabs according to claim 3, characterized in that: The embedded body (10) is provided with positioning holes (30) and positioning pins (40), and the positioning holes (30) on one embedded body (10) and the positioning pins (40) on the other embedded body (10) are adapted to each other.

5. The construction process of a prefabricated composite slab waterproofing system for prefabricated buildings according to claim 1 or 2, characterized in that: The steps are as follows: Step 1: Surveying and setting out, including horizontal and vertical control lines, and setting up vertical control points and elevation control points; Step 2: Quickly install temporary steel pipe supports. Before hoisting the composite slabs and composite beams, use a laser level to quickly erect temporary supports. Step 3: Hoist the composite beams and composite slabs into place, adjust and fix the composite beams and composite slabs; Step 4: Clean the surface of the composite beam and composite slab, adjust the position of the two composite slabs left and right or front and back and connect them through the embedded body (10) and waterproof component (20) for adaptation, and complete the construction of the composite slab without post-pouring splice joint; Step 5: After laying the pipelines and reinforcing bars, erect the lateral formwork and pour the concrete.

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