Installation construction method and leakage-proof structure of building full-paving formwork prefabricated laminated slab

Abstract

The invention discloses an installation and construction method for a building full-paving formwork prefabricated laminated slab. Comprising the following installation and construction steps of S1, installation of a fully-paved formwork supporting system, S2, numbering and stacking of prefabricated laminated slabs, S3, numbering of fully-paved formwork surfaces and pasting and positioning of joint adhesive tapes, S4, placement of bottom steel bars at bidirectional joint positions, S5, hoisting and installation of the prefabricated laminated slabs, S6, oppositely-pulling lock joints at the joint positions to be flat, S7, treatment of water and electricity pipeline boxes and reserved holes, and S8, installation of upper-layer steel bars of the prefabricated laminated slabs. And S9, concrete pouring. According to the installation and construction method, the mode of fully paving the formworks is adopted, the construction safety can be well guaranteed, the construction efficiency is improved, and the plate bottom flatness is effectively controlled; by adopting the process step of flattening the zipper seam at the joint, the seam leakage phenomenon can be well ensured, poor combination of new concrete and old concrete is avoided, the surface appearance of the structure is ensured, and the forming quality is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an installation construction method of a prefabricated composite board of a building full-coverage template and a leak-proof structure thereof. Background Art

[0002] Prefabricated reinforced concrete structure is one of the important directions of development of building structure in my country. It is conducive to the development of my country's building industrialization, improving production efficiency and saving energy, developing green and environmentally friendly buildings, and is conducive to improving and ensuring the quality of construction projects. Among them, prefabricated composite slabs are widely used in prefabricated reinforced concrete structures. Prefabricated composite slabs are a kind of prefabricated concrete slabs used as the base plate, on which the concrete composite layer is poured. After the pouring is completed, the two are used as assembled integral floor slabs.

[0003] At present, in the process of laying prefabricated composite panels on the formwork, the bottom surface of the prefabricated composite panels is uneven, and a gap is formed between the bottom of the prefabricated composite panels and the formwork. When pouring later, the gap leakage will occur. At the same time, the poor combination of new and old concrete will also cause gap leakage, and also affect the surface appearance of the structure. Through repeated process improvements and technical breakthroughs, for the effective treatment and control of the joints of prefabricated composite panels, combined with on-site practice, a two-way composite panel full-paving formwork installation construction method has been summarized and formed, which has achieved good results, so it is necessary to improve it. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an installation construction method of a prefabricated composite board for a building full-coverage template and a leak-proof structure thereof.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for installing and constructing a prefabricated composite board with a full-cover template for a building, comprising the following installation and construction steps:

[0006] S1 Installation of full-paving formwork support system: Install the support system, and fully spread the formwork on the support system. After the full spreading is completed, use a level to test the flatness;

[0007] S2 Numbering and stacking of prefabricated composite panels: number the prefabricated composite panels in advance, all of which are labeled with QR codes when they are delivered and are stacked in a certain order. Before hoisting, mark the prefabricated composite panels with compasses and numbers, arrange the prefabricated composite panels in the order of on-site installation, use stacking racks at the stacking site, control the stacking height, and verify the maximum load bearing capacity;

[0008] S3 Full-spread template surface numbering and joint adhesive tape pasting and positioning: Clean the full-spread template, measure and lay out, draw the placement position of the prefabricated composite board, and number it on the full-spread template. The corresponding number is the number of the prefabricated composite board. After drawing the outline of the prefabricated composite board installation on the full-spread template, accurately paste and position it according to the outline;

[0009] S4 Placement of bottom reinforcement at bidirectional joint position: Place bottom reinforcement at the joint position of precast composite slab;

[0010] S5 Prefabricated composite slab hoisting and installation: Set the hoisting point position on the truss of the prefabricated composite slab, and strengthen and mark the hoisting point. The hoisting of the prefabricated composite slab follows the principle of from far to near, and hoisting is carried out in sequence. First, hoist it slowly, and then hoist it after observing it 50cm above the ground. When in place, the prefabricated composite slab should be installed vertically from top to bottom. During the process of positioning, the construction workers should adjust the direction by hand, align the edge line of the prefabricated composite slab with the wall contour line, and stop it slowly when lowering it, accurately place it on the pre-attached joint tape, and tie the bottom steel bars to the butt support of the prefabricated composite slab;

[0011] Flatten the zipper seam at the S6 joint: open an installation hole on the middle line of the bidirectional joint position of the full-paving template, install a screw pipe fitting in the installation hole, and then install a T-type screw flattening piece on the screw pipe fitting, and then install a locking nut on the bottom surface of the full-paving template, so that the T-type screw flattening piece presses down and locks the prefabricated composite panels on both sides respectively, so that the relative compression of the prefabricated composite panels, the joint rubber strip and the full-paving template makes the gap completely sealed. Since the two sides of the T-type screw flattening piece are in the same straight line, the prefabricated composite panels are flattened, and the flatness is tested with a level.

[0012] S7 Water and electricity pipeline box and reserved hole processing: according to the line conditions of the required water and electricity pipelines, reserved holes are processed, and water and electricity pipeline boxes are pre-buried, and water and electricity pipes connected to the water and electricity pipeline boxes are laid;

[0013] S8 Installation of upper steel bars of prefabricated composite slabs: After the water and electricity pipelines are laid and inspected and qualified, the steel bar workers install the upper steel bars on the prefabricated composite slabs. The upper steel bars are set on the upper chord steel bars of the lattice beams and tied and fixed, protecting the laid steel bars and prefabricated composite slabs;

[0014] S9 Concrete pouring: pour the upper concrete and joint concrete. When pouring concrete, pour the concrete at the joint first, and then pour the concrete on the upper layer of the composite slab. When vibrating, prevent the steel bars from moving, and control the force to prevent leakage caused by openings at the joints.

[0015] As a preferred embodiment of the present invention, in the step S5, before the prefabricated composite panel is lifted and installed, preparations for lifting are carried out, safety fences are placed in the lifting range, warning lines are set, including safety inspections of the hooks, inspections of the wire ropes used for lifting machinery, and regular inspections of the winding drums and pulleys to ensure normal, safe and reliable operation. The lifting should be vertical and stable, and four-point lifting should be adopted, with the angle between the sling and the horizontal plane of the prefabricated composite panel being 45°-60°.

[0016] As a preferred embodiment of the present invention, in the step S9, before pouring concrete, it is necessary to clean up the debris on the composite floor slab and flush the upper part of the composite floor slab.

[0017] A leakproof structure of a prefabricated composite board with a full-paving template for a building, comprising a support system, a full-paving template and a prefabricated composite board, wherein the support system horizontally supports the full-paving template, the prefabricated composite boards are arranged on the full-paving template at intervals, the side end surfaces of the prefabricated composite boards are extended with docking supports, bidirectional joint positions are arranged between the prefabricated composite boards, the docking supports are arranged in a butt-jointed manner and do not interfere with each other, a joint rubber strip is arranged between the side end bottom of the prefabricated composite board and the full-paving template, and the full-paving template is provided at the bidirectional joint position A mounting hole is provided on the middle line of the arrangement, a screw pipe fitting is installed in the mounting hole, a T-shaped screw flattening piece is installed on the screw pipe fitting, a threaded portion I is provided on the T-shaped screw flattening piece, the threaded portion I is threadedly installed with the screw pipe fitting, a spiral portion is integrally provided on the screw pipe fitting, a threaded portion II is provided on the screw pipe fitting, a locking nut threadedly matched with the threaded portion II is installed on the bottom surface of the full-paving formwork, the bidirectional joint position is filled with joint concrete, and the prefabricated composite panel is filled with upper concrete.

[0018] As a preferred embodiment of the present invention, trusses are arranged on the top surface of the prefabricated composite slab, and upper steel bars are arranged on the trusses.

[0019] As a preferred embodiment of the present invention, the prefabricated composite plate is provided with a reserved hole, a water and electricity pipeline box is pre-buried in the reserved hole, and the water and electricity pipeline box is provided with water and electricity pipelines.

[0020] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] The installation and construction method of the prefabricated composite slab with full-spread formwork according to the present invention adopts the full-spread formwork method, which can well ensure construction safety and improve construction efficiency compared with the half-spread formwork method. The flatness test is carried out by a level meter to effectively control the flatness of the bottom of the board, and effectively prevent the problem of leakage at the joint position of the composite slab; the prefabricated composite slabs are numbered and stacked. The prefabricated composite slabs are stacked in a certain order when they leave the site. Each composite slab is equipped with a QR code label. Corresponding numbers can also be made on the template before hoisting. A dedicated person will check the numbers during the process to ensure that the prefabricated composite slabs are accurately and efficiently positioned in the shortest time. At the same time, the bottom layer of steel bars at the joint position are inserted in advance during installation, which effectively saves construction time; the process step of flattening the zipper seam at the joint is adopted. Since the two-way prefabricated composite slabs have many joints, before installation, Before installation, the prefabricated composite board is directly pressed on the position of the joint strip, and then the T-screw flattening piece is used. The screw pipe fitting is first installed in the installation hole, and then the T-screw flattening piece is installed on the screw pipe fitting. Then the locking nut is installed on the bottom surface of the full-paved formwork, so that the T-screw flattening piece presses down and locks the prefabricated composite boards on both sides respectively, so that the relative compression of the prefabricated composite boards, the joint strip and the full-paved formwork makes the gap completely sealed. Since the two side parts of the T-screw flattening piece are in the same straight line, a flattened state is formed between the prefabricated composite boards, and a level is used to test the flatness. The structure and its process can well ensure the leakage of the gap, avoid the poor combination of new and old concrete, ensure the surface appearance of the structure, and greatly improve the molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the installation construction steps of the prefabricated composite board of the building full-cover template of the present invention;

[0024] Figure 2 It is a schematic diagram of the anti-leakage structure of the prefabricated composite board of the full-cover template of the building of the present invention;

[0025] Figure 3 It is a schematic diagram of the leakproof structure of the prefabricated composite board of the building full-paving template of the present invention before pouring;

[0026] Figure 4 A schematic diagram of installing a water and electricity pipeline box and water and electricity pipelines on the prefabricated composite panel of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the spiral tube member of the present invention;

[0028] Figure 6It is a schematic structural diagram of a T-type screw flattening member of the present invention;

[0029] In the figure: 1. Full-cover formwork; 2. Prefabricated composite board; 3. Butt support; 4. Bidirectional joint position; 5. Joint rubber strip; 6. Mounting hole; 7. Screw fitting; 8. T-screw flattening piece; 9. Threaded part I; 10. Spiral part; 11. Threaded part II; 12. Locking nut; 13. Joint concrete; 14. Upper concrete; 15. Truss; 16. Upper steel bar; 17. Reserved cavity; 18. Water and electricity pipeline box; 19. Water and electricity pipeline; 20. Bottom steel bar. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example

[0032] See also Figure 1-6 The present invention provides a technical solution: a method for installing and constructing a prefabricated composite board with a full-cover template for a building, comprising the following installation and construction steps:

[0033] S1 Installation of full-paving formwork support system: Install the support system, and fully pave the formwork 1 on the support system. After the full pavement is completed, use a level to test the flatness;

[0034] S2 Prefabricated Composite Panel Numbering and Stacking: Prefabricated composite panels 2 are numbered in advance. Prefabricated composite panels 2 are all labeled with QR codes when they are delivered and are stacked in a certain order. Compasses and numbers are marked on prefabricated composite panels 2 before hoisting. Prefabricated composite panels 2 are stacked according to the on-site installation sequence. Stacking racks are used at the stacking site, and the stacking height is controlled. The maximum load bearing capacity is verified;

[0035] S3 Numbering of the full-paving template surface and pasting and positioning of the joint tape: clean the full-paving template 1, draw the placement position of the prefabricated composite board 2 by measuring and laying out, and number it on the full-paving template 1. The corresponding number is the number of the prefabricated composite board 2. After drawing the outline of the installation of the prefabricated composite board 2 on the full-paving template 1, accurately paste and position it according to the outline;

[0036] S4 Placement of bottom reinforcement at bidirectional joint position: Place bottom reinforcement 20 at the joint position of prefabricated composite slab 2;

[0037] S5 Prefabricated composite slab hoisting and installation: Set the hoisting point position on the truss 15 on the prefabricated composite slab 2, and strengthen and mark the hoisting point. The hoisting of the prefabricated composite slab 2 follows the principle of hoisting from far to near, and hoisting is carried out in sequence. First, hoist it slowly, and then hoist it after observing it 50 cm above the ground. When in place, the prefabricated composite slab 2 should be installed vertically from top to bottom. During the process of in-placement, the construction personnel should adjust the direction by hand, align the edge line of the prefabricated composite slab 2 with the wall contour line, and stop it slowly when putting it down, accurately place it on the pre-attached joint tape 5, and tie the bottom steel bars 20 to the butt support of the prefabricated composite slab 2;

[0038] Flatten the zipper seam at the S6 joint: the full-paving template 1 opens a mounting hole 6 on the middle line of the bidirectional joint position 4, installs a screw pipe 7 in the mounting hole 6, and then installs a T-screw flattening piece 8 on the screw pipe 7, and then installs a locking nut 12 on the bottom surface of the full-paving template 1, so that the T-screw flattening piece 8 presses down and locks the prefabricated composite panels 2 on both sides respectively, so that the relative compression of the prefabricated composite panels 2, the joint rubber strip 5 and the full-paving template 1 makes the gap completely sealed. Since the two sides of the T-screw flattening piece 8 are in the same straight line, the prefabricated composite panels 2 are flattened, and the flatness is tested with a level.

[0039] S7 Water and electricity pipeline box and reserved hole processing: according to the line conditions of the required water and electricity pipelines, reserved holes are processed, and water and electricity pipeline boxes are pre-buried, and water and electricity pipes connected to the water and electricity pipeline boxes are laid;

[0040] S8 Installation of upper steel bars of prefabricated composite slabs: After the water and electricity pipelines are laid and inspected and qualified, the steel bar workers install the upper steel bars 16 on the prefabricated composite slabs. The upper steel bars 16 are arranged on the upper chord steel bars of the lattice beams and tied and fixed, protecting the laid steel bars and prefabricated composite slabs 2;

[0041] S9 concrete pouring: pouring the upper concrete 14 and the joint concrete 13. When pouring concrete, pour the concrete at the joint position first, and then pour the concrete on the upper layer of the composite slab 2. When vibrating, prevent the steel bars from moving, and control the force to prevent the joint position from opening and causing leakage.

[0042] In this embodiment, according to the installation and construction method of the prefabricated composite slab with full-spread formwork of the building of the present invention, the full-spread formwork method is adopted. Compared with the half-spread formwork method, it can well ensure the construction safety and improve the construction efficiency. The flatness test is carried out by the level meter to effectively control the flatness of the bottom of the board, and effectively prevent the leakage of slurry at the joint position of the composite slab; the prefabricated composite slabs are numbered and stacked. The prefabricated composite slabs are stacked in a certain order when they leave the site. Each composite slab is equipped with a QR code label. The corresponding number can also be made on the template before lifting. The number is checked by a dedicated person in the process to ensure that the prefabricated composite slab is accurately and efficiently positioned in the shortest time. At the same time, the bottom steel bar at the joint position is inserted in advance during installation, which effectively saves the construction period; the process step of flattening the zipper seam at the joint is adopted. Since the two-way prefabricated composite slabs have many joints, the installation Before installation, mark the positions on the full-paving formwork in advance, set joint rubber strips at the joint positions, and during installation, directly press the prefabricated composite panels on the joint rubber strip positions, and then use the T-screw flattening piece to first install the screw pipe fitting in the installation hole, and then install the T-screw flattening piece on the screw pipe fitting, and then install the locking nut on the bottom surface of the full-paving formwork, so that the T-screw flattening piece presses down and locks the prefabricated composite panels on both sides respectively, so that the relative compression of the prefabricated composite panels, joint rubber strips and full-paving formwork makes the gap completely sealed. Since the two side parts of the T-screw flattening piece are in the same straight line, a flattened state is formed between the prefabricated composite panels, and a level is used to test the flatness. The structure and its process can well ensure the leakage of gaps, avoid poor bonding between new and old concrete, ensure the surface appearance of the structure, and greatly improve the molding quality.

[0043] Specifically, due to the large number of structural types of the support system, the existing support system with adjustable horizontal height can be used to ensure sufficient strength and rigidity, and the horizontal height of the support system must meet the precise requirements. The level can be a practical tool with existing technology. If the flatness cannot meet the requirements, the top support elevation of the support system should be appropriately adjusted to ensure the design elevation and the flatness of the board surface to prevent concrete leakage caused by the tilt of the board surface during concrete pouring. The compass is used to control the direction of accurate lifting and placement. The joint adhesive strip can be a single-sided adhesive strip, which is convenient for micro-distance adjustment of the prefabricated composite board. Lifting should be stopped when the wind is above level 5. The lifting points should be checked and reviewed during the on-site inspection and lifting. If the lifting requirements are not met or the lifting points are damaged, they shall not be lifted. When adjusting the position of the board, small wooden blocks should be used instead of using a crowbar directly to avoid damaging the edges and corners of the board. The shelving length should be guaranteed, and the allowable deviation should not exceed 5 mm. For pipelines, rigid pipelines should be used when passing straight through, and pipes with better flexibility should be used when passing obliquely. Avoid pre-buried multiple pipelines in a cluster, use pipelines with smaller diameters, and pre-buried them in dispersed holes. Water and electricity pipeline boxes need to be sealed with covers before pouring.

[0044] To be more specific, in step S5, before the prefabricated composite slab is hoisted and installed, preparations for hoisting are carried out, safety fences are placed in the hoisting range, warning lines are set up, including safety inspections of the hooks, inspections of the wire ropes used in the lifting machinery, and regular inspections of the winding drums and pulleys to ensure normal, safe and reliable operation. The hoisting should be vertical and stable, and four-point hoisting should be adopted, with the angle between the sling and the horizontal plane of the prefabricated composite slab being 45°-60°.

[0045] In this embodiment, a safety fence is placed and a warning line is set to provide a safety protection function. Four-point lifting is adopted, and the angle between the lifting cable and the horizontal plane of the prefabricated composite panel is 45°-60°. This lifting method is stable, safe and reliable.

[0046] More specifically, in step S9, before pouring concrete, it is necessary to clean up the debris on the composite floor slab and rinse the upper part of the composite floor slab.

[0047] In this embodiment, this method is adopted to ensure that the surface of the composite board is fully moistened, but there should not be too much visible water.

[0048] A leakproof structure of a prefabricated composite board of a building full-paving template, comprising a support system, a full-paving template 1 and a prefabricated composite board 2, wherein the support system horizontally supports the full-paving template 1, the prefabricated composite board 2 is arranged on the full-paving template 1 at intervals, a butt support 3 is extended from the side end surface of the prefabricated composite board 2, a bidirectional joint position 4 is arranged between the prefabricated composite boards 2, the butt support 3 is butt-jointed and does not interfere with each other, a joint rubber strip 5 is arranged between the side end bottom of the prefabricated composite board 2 and the full-paving template 1, and the full-paving template 1 is in the middle of the bidirectional joint position 4. An installation hole 6 is opened on the interval line, a screw pipe fitting 7 is installed in the installation hole 6, a T-type screw flattening piece 8 is installed on the screw pipe fitting 7, a threaded portion I9 is ​​provided on the T-type screw flattening piece 8, the threaded portion I9 is ​​threadedly installed with the screw pipe fitting 7, a spiral portion 10 is integrally provided on the screw pipe fitting 7, a threaded portion II11 is provided on the screw pipe fitting 7, a locking nut 12 threadably installed with the threaded portion II11 is installed on the bottom surface of the full-coverage formwork 1, the bidirectional joint position 4 is filled with joint concrete 13, and the prefabricated composite slab 2 is filled with upper concrete 14.

[0049] In this embodiment, a joint rubber strip 5 is arranged between the side end bottom of the prefabricated composite board 2 and the full-paving formwork 1. Since the bidirectional prefabricated composite board 2 has many joints, the joint rubber strip 5 is arranged at the joint position according to the positioning line on the full-paving formwork 1. During installation, the prefabricated composite board 2 is directly pressed on the position of the joint rubber strip 5, and then the screw pipe part 7 is first installed in the installation hole 6 through the T-screw flattening part 8, and then the T-screw flattening part 8 is installed on the screw pipe part 7, and then the locking nut 12 is installed on the bottom surface of the full-paving formwork 1, so that the T-screw flattening part 8 presses down and locks the prefabricated composite boards 2 on both sides respectively, so that the relative compression of the prefabricated composite board 2, the joint rubber strip 5 and the full-paving formwork 1 makes the gap completely sealed. Since the two side parts of the T-screw flattening part 8 are in the same straight line, a flattened state is formed between the prefabricated composite boards 2, which can well ensure the leakage of the gap, avoid the poor combination of new and old concrete, ensure the surface appearance of the structure, and greatly improve the molding quality.

[0050] More specifically, trusses 15 are arranged on the top surface of the prefabricated composite slab 2 , and upper steel bars 16 are arranged on the trusses 15 .

[0051] In this embodiment, an upper layer of steel bars 16 are provided on the truss 15 , and an upper layer of concrete 14 is filled on the top surface of the prefabricated composite slab 2 . The upper layer of concrete 14 embeds the truss 15 and the upper layer of steel bars 16 , thereby improving the strength quality of the upper layer of concrete 14 .

[0052] More specifically, a reserved hole 17 is opened on the prefabricated composite board 2 , a water and electricity pipeline box 18 is pre-buried in the reserved hole 17 , and the water and electricity pipeline box 18 is provided with water and electricity pipelines 19 .

[0053] In this embodiment, through this structure, water and electricity can be pre-buried in advance to facilitate subsequent drilling operations, thereby preventing damage to internal steel bars and affecting the quality of the structure.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for installing and constructing a prefabricated composite board with a full-cover template for a building, characterized in that: The installation steps include the following: S1 Installation of full-paving formwork support system: Install the support system, and fully spread the formwork on the support system. After the full spreading is completed, use a level to test the flatness; S2 Numbering and stacking of prefabricated composite panels: number the prefabricated composite panels in advance, all of which are labeled with QR codes when they are delivered and are stacked in a certain order. Before hoisting, mark the prefabricated composite panels with compasses and numbers, arrange the prefabricated composite panels in the order of on-site installation, use stacking racks at the stacking site, control the stacking height, and verify the maximum load bearing capacity; S3 Full-spread template surface numbering and joint adhesive tape pasting and positioning: Clean the full-spread template, measure and lay out, draw the placement position of the prefabricated composite board, and number it on the full-spread template. The corresponding number is the number of the prefabricated composite board. After drawing the outline of the prefabricated composite board installation on the full-spread template, accurately paste and position it according to the outline; S4 Placement of bottom reinforcement at bidirectional joint position: Place bottom reinforcement at the joint position of precast composite slab; S5 Prefabricated composite slab hoisting and installation: Set the hoisting point position on the truss of the prefabricated composite slab, and strengthen and mark the hoisting point. The hoisting of the prefabricated composite slab follows the principle of from far to near, and hoisting is carried out in sequence. First, hoist it slowly, and then hoist it after observing it 50cm above the ground. When in place, the prefabricated composite slab should be installed vertically from top to bottom. During the process of positioning, the construction workers should adjust the direction by hand, align the edge line of the prefabricated composite slab with the wall contour line, and stop it slowly when lowering it, accurately place it on the pre-attached joint tape, and tie the bottom steel bars to the butt support of the prefabricated composite slab; Flatten the zipper seam at the S6 joint: open an installation hole on the middle line of the bidirectional joint position of the full-paving template, install a screw pipe fitting in the installation hole, and then install a T-type screw flattening piece on the screw pipe fitting, and then install a locking nut on the bottom surface of the full-paving template, so that the T-type screw flattening piece presses down and locks the prefabricated composite panels on both sides respectively, so that the relative compression of the prefabricated composite panels, the joint rubber strip and the full-paving template makes the gap completely sealed. Since the two sides of the T-type screw flattening piece are in the same straight line, the prefabricated composite panels are flattened, and the flatness is tested with a level. S7 Water and electricity pipeline box and reserved hole processing: according to the line conditions of the required water and electricity pipelines, reserved holes are processed, and water and electricity pipeline boxes are pre-buried, and water and electricity pipes connected to the water and electricity pipeline boxes are laid; S8 Installation of upper steel bars of prefabricated composite slabs: After the water and electricity pipelines are laid and inspected and qualified, the steel bar workers install the upper steel bars on the prefabricated composite slabs. The upper steel bars are set on the upper chord steel bars of the lattice beams and tied and fixed, protecting the laid steel bars and prefabricated composite slabs; S9 Concrete pouring: pour the upper concrete and joint concrete. When pouring concrete, pour the concrete at the joint first, and then pour the concrete on the upper layer of the composite slab. When vibrating, prevent the steel bars from moving, and control the force to prevent leakage caused by openings at the joints.

2. The installation and construction method of a prefabricated composite board for a building full-coverage formwork according to claim 1 is characterized by: In step S5, before the prefabricated composite panel is hoisted and installed, preparations for hoisting are carried out, safety fences are placed in the hoisting range, warning lines are set up, including safety inspections of hooks, inspections of wire ropes used in lifting machinery, and regular inspections of winding drums and pulleys to ensure normal, safe and reliable operation. The hoisting should be vertical and stable, and four-point hoisting should be adopted, with the angle between the sling and the horizontal plane of the prefabricated composite panel being 45°-60°.

3. The installation and construction method of a prefabricated composite board for a building full-cover template according to claim 1 is characterized by: In step S9, before pouring concrete, it is necessary to clean up the debris on the composite floor slab and rinse the upper part of the composite floor slab.

4. A leakproof structure for a prefabricated composite board with a full-spread template for a building, comprising a support system, a full-spread template and a prefabricated composite board, wherein the support system horizontally supports the full-spread template, the prefabricated composite boards are arranged on the full-spread template at intervals, the side end surfaces of the prefabricated composite boards are extended with docking supports, bidirectional joint positions are arranged between the prefabricated composite boards, the docking supports are arranged in a butt-jointed manner and do not interfere with each other, a joint strip is arranged between the side end bottom of the prefabricated composite board and the full-spread template, and the full-spread template has a bidirectional joint. A mounting hole is opened on the middle line of the position, a screw pipe fitting is installed in the mounting hole, a T-shaped screw flattening piece is installed on the screw pipe fitting, a threaded portion I is arranged on the T-shaped screw flattening piece, the threaded portion I is threadedly installed with the screw pipe fitting, a spiral portion is integrally arranged on the screw pipe fitting, a threaded portion II is arranged on the screw pipe fitting, a locking nut threadedly matched with the threaded portion II is installed on the bottom surface of the full-covered formwork, the bidirectional joint position is filled with joint concrete, and the prefabricated composite panel is filled with upper concrete.

5. The anti-leakage structure of the prefabricated composite board of the building full-cover template according to claim 4 is characterized by: Its characteristic is that trusses are arranged on the top surface of the prefabricated composite plate, and upper steel bars are arranged on the trusses.

6. The anti-leakage structure of the prefabricated composite board of the building full-cover template according to claim 4 is characterized by: The prefabricated composite plate is provided with a reserved hole, a water and electricity pipeline box is pre-buried in the reserved hole, and the water and electricity pipeline box is provided with water and electricity pipelines.

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