CN115467458A - Concrete laminated slab with hollow steel ribs and construction method thereof - Google Patents

Abstract

The invention relates to the technical field of concrete laminated slab pouring, in particular to a concrete laminated slab with hollow steel ribs and a construction method thereof, wherein the concrete laminated slab comprises a prefabricated layer and a cast-in-place layer, and has the following beneficial effects: the longitudinal hollow steel ribs are used for replacing steel bar trusses of the traditional laminated slab, so that the rigidity and the bearing capacity of the structure are enhanced, and the prefabricated bottom plate of the laminated slab can be prevented from cracking during transportation and hoisting; the structure can reduce the plate thickness of the laminated slab prefabricated bottom plate, reduce the self weight of the laminated slab prefabricated bottom plate and enable the transportation and hoisting of the laminated slab to be more efficient; the lower support can be used less or not used during hoisting construction, so that the construction difficulty is reduced, and the construction efficiency is increased.

Description

Concrete laminated slab with hollow steel ribs and construction method thereof

Technical Field

The invention relates to the technical field of concrete composite slab pouring, in particular to a concrete composite slab with hollow steel ribs and a construction method thereof.

Background

The concrete laminated slab is an assembled integral floor slab formed by laminating prefabricated slabs and cast-in-place reinforced concrete layers, and is widely applied to the existing assembled buildings. The existing concrete laminated slab mainly adopts a steel bar truss concrete laminated slab, the integral rigidity of the laminated slab is improved through a steel bar truss, and the laminated slab is prevented from cracking; however, the rigidity of the steel bar truss embedded in the concrete bottom plate is increased limitedly, and the connection stability between the truss and the bottom plate is not high, so that the concrete composite slab is easy to crack during transportation and hoisting; and the bearing capacity of the laminated slab is not large, and a large amount of vertical supports must be arranged in the construction process of the laminated slab.

In the prior art, in order to solve the problems, a ribbed concrete laminated slab is generally adopted, and the concrete rib is additionally arranged to enhance the integral rigidity of a structure so as to prevent the laminated slab from cracking and increase the bearing capacity of the laminated slab; although the structure can play a certain role in preventing the bottom plate from cracking, the self weight of the laminated slab can be increased by additionally arranging the concrete ribs on the bottom plate, and a larger bottom plate support still needs to be arranged during construction, so that the construction difficulty of the laminated slab is increased, and the construction efficiency is reduced; and this structure is not suitable for use in large span floor structures.

Disclosure of Invention

The invention aims to provide a concrete composite slab with hollow steel ribs and a construction method thereof, and aims to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a concrete composite slab with a hollow steel rib, the concrete composite slab comprising:

the prefabricated layer is provided with a hollow steel rib component and a lower steel mesh component in the middle, the lower steel mesh component consists of a lower longitudinal beam and a lower transverse beam which are connected in a criss-cross mode, the hollow steel rib component consists of a lower frame, an upper frame and a connecting plate, the connecting plate is clamped and fixed between the lower frame and the upper frame, a vertical pipe is vertically arranged at the connecting position of the lower longitudinal beam and the lower transverse beam, the lower longitudinal beam penetrates through the side wall of the lower frame, and a lower longitudinal and transverse positioning hole group which is matched with the lower longitudinal beam and the lower transverse beam in a penetrating and inserting mode is arranged on the outer wall of the vertical pipe;

the cast-in-place layer, cast-in-place layer and prefabricated layer are all through concrete placement, are provided with the reinforcing bar net piece subassembly in the cast-in-place layer, go up the reinforcing bar net piece subassembly and constitute by last longitudinal beam and last transverse beam, go up the longitudinal beam and run through to peg graft in the upper ledge, the upper end circular arc outer wall of riser runs through with great ease and is provided with the last vertical beam, goes up the horizontal beam cooperation and pegs graft and move the positioning hole group about freely and quickly.

Preferably, the lower end of the vertical pipe is provided with a positioning base, the upper end of the positioning base is provided with a stud in threaded connection with a port at the lower end of the vertical pipe, the cast-in-place layer and the prefabricated layer are cast and formed in a casting mold, a casting inner cavity is arranged in the casting mold, and the inner wall of the lower end of the casting inner cavity is provided with a positioning groove in matched and sleeved connection with the positioning base.

Preferably, both ends of the upper frame are provided with 45-degree chamfer-shaped notches, the lower end face of the upper frame and the upper end face of the lower frame are both provided with linearly distributed insertion rods, the upper end face and the lower end face of the connecting plate are provided with insertion holes, and the insertion rods are inserted into the insertion holes.

Preferably, the lateral wall of the outer side of the connecting plate is provided with a fixed eccentric rod which is arranged in a staggered manner and parallel to the lower longitudinal beam, the circular arc outer wall of the vertical pipe is provided with a positioning sleeve ring, the positioning sleeve ring is sleeved on the fixed eccentric rod in a sliding manner, and a flexible connecting sheet is arranged between the positioning sleeve ring and the outer wall of the vertical pipe.

Preferably, the outer edge of the upper end of the prefabricated layer is provided with a chamfer, the end part of the fixed eccentric rod is connected with a frame-shaped chamfer strip, and a chamfer inclined plane at the lower end of the chamfer strip is attached to the chamfer of the prefabricated layer.

Preferably, the upper frame is provided with an upper through hole which is matched and spliced with the upper longitudinal beam, the side wall of the lower frame is provided with a lower through hole which is matched and spliced with the lower longitudinal beam in a penetrating manner, and the inner diameter of the lower through hole is smaller than that of the upper through hole.

Preferably, the upper frame and the lower frame are both provided with a pair of through long grooves in a penetrating manner, and the through long grooves in the upper frame are connected with a hoisting assembly of hoisting equipment.

Preferably, it is protruding to be provided with the annular ring of circle on the location base, the location base is dismantled to the prefabricated layer after pouring, places the support base in dismantling the back constant head tank, and prefabricated layer forms the upwards sunken anti-overflow tank in the position that corresponds with the ring is protruding.

Preferably, the circular arc outer wall of the upper end of the stand pipe transversely penetrates through an open slot, the open slot is located at the upper end of the prefabricated layer, and the open slot is located at the lower end of the upper longitudinal and transverse positioning hole group.

A construction method realized according to the concrete composite slab with the hollow steel ribs comprises the following steps:

assembling prefabricated components, namely, realizing the assembly of an upper frame and a lower frame through a connecting plate to form a hollow steel rib component, inserting linearly distributed lower longitudinal beams into the lower frame, sleeving a plurality of groups of vertical pipes along the lower longitudinal beams and fixed offset rods, inserting lower transverse beams into positions of the vertical pipes corresponding to lower longitudinal and transverse positioning hole groups, and arranging chamfer bars at the end parts of the fixed offset rods;

pouring a prefabricated layer, namely placing the prefabricated component in a pouring inner cavity, realizing suspension and accurate positioning installation of the prefabricated component through the matching of a positioning base at the lower end of the vertical pipe and a positioning groove, and forming the prefabricated layer through concrete pouring;

hoisting and disassembling, namely hoisting the molded prefabricated layer through a hoisting assembly, disassembling the positioning base and the chamfering strip, forming a chamfer on the prefabricated layer at the position of the chamfering strip, and forming a through pre-buried hole at the positions of the positioning base and the vertical pipe;

and (3) secondary installation and pouring, placing a support base in the positioning groove to plug the lower end port of the through embedded hole, filling the embedded hole and the hollow steel rib in the secondary pouring process to form a cast-in-place layer, and forming stable staggered pouring connection between the cast-in-place layer and the vertical pipe and the prefabricated layer under the filling of the through long groove, the embedded hole and the open groove.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the longitudinal hollow steel ribs are used for replacing a steel bar truss of the traditional laminated slab, so that the rigidity and the bearing capacity of the structure are enhanced, and the prefabricated bottom plate of the laminated slab can be prevented from cracking during transportation and hoisting; the structure can reduce the plate thickness of the prefabricated bottom plate of the laminated slab, reduce the self weight of the prefabricated bottom plate of the laminated slab and enable the transportation and the hoisting of the laminated slab to be more efficient; the lower support can be used less or not used during hoisting construction, so that the construction difficulty is reduced, and the construction efficiency is increased.

Drawings

FIG. 1 is a schematic view of a prefabricated hollow steel rib assembly installation structure of the present invention;

FIG. 2 is a schematic view of a precast layer casting structure of the present invention;

FIG. 3 is a schematic view of the hoisting and disassembling structure of the present invention;

FIG. 4 is a schematic view of a cast-in-place layer casting structure according to the present invention;

FIG. 5 is a schematic perspective view of a connecting plate according to the present invention;

FIG. 6 is a schematic perspective view of an upper frame according to the present invention;

FIG. 7 is a schematic perspective view of a riser of the present invention;

FIG. 8 is an enlarged view of the structure at A in FIG. 2;

fig. 9 is a schematic perspective view of a positioning base according to the present invention.

In the figure: 1. pouring a mold; 2. pouring an inner cavity; 3. putting the frame on; 4. a connecting plate; 5. a lower frame; 6. the long groove is penetrated; 7. a riser; 8. a lower longitudinal beam; 9. a lower transverse beam; 10. fixing the offset rod; 11. chamfering; 12. positioning a groove; 13. positioning a base; 14. inserting a rod; 15. an upper longitudinal beam; 16. an upper transverse beam; 17. an upper through hole; 18. a lower through hole; 19. arranging a longitudinal and transverse positioning hole group; 20. a support base; 21. prefabricating a layer; 22. hoisting the assembly; 23. a cast-in-place layer; 24. the circular ring is convex; 25. an anti-overflow groove; 26. a jack; 27. cutting; 28. a lower longitudinal and transverse positioning hole group; 29. an open slot; 30. a positioning collar; 31. a flexible connecting sheet; 32. a stud.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 9, the present invention provides a technical solution:

example 1:

a concrete composite slab with hollow steel ribs comprises a prefabricated layer 21 and a cast-in-place layer 23.

The middle of the prefabricated layer 21 is provided with a hollow steel rib component and a lower steel mesh component, the lower steel mesh component consists of a lower longitudinal beam 8 and a lower transverse beam 9 which are connected in a criss-cross mode, the hollow steel rib component consists of a lower frame 5, an upper frame 3 and a connecting plate 4, the connecting plate 4 is clamped and fixed between the lower frame 5 and the upper frame 3, a vertical pipe 7 is vertically arranged at the connecting position of the lower longitudinal beam 8 and the lower transverse beam 9, the lower longitudinal beam 8 penetrates through the side wall of the lower frame 5, and a lower longitudinal and transverse positioning hole group 28 which is matched with the lower longitudinal beam 8 and the lower transverse beam 9 to be penetrated and inserted is arranged on the outer wall of the vertical pipe 7;

cast-in-place layer 23 and prefabricated layer 21 are all through concrete placement, are provided with steel bar net piece subassembly in cast-in-place layer 23, go up steel bar net piece subassembly and constitute by last longitudinal beam 15 and last transverse beam 16, go up longitudinal beam 15 and run through to peg graft in upper ledge 3, the upper end circular arc outer wall of riser 7 runs through with great ease and is provided with the last vertical beam 15, the last transverse beam 16 cooperation of pegging graft and moves about freely and quickly location punch combination 19.

Through the reinforcing bar net sheet component which is vertically and horizontally distributed, a reinforcing bar type steel framework is jointly formed, so that the cast-in-place layer and the prefabricated layer can be combined into a whole, and the overall stability of the laminated slab is enhanced.

The longitudinal hollow steel ribs are used for replacing steel bar trusses of the traditional laminated slab, so that the rigidity and the bearing capacity of the structure are enhanced, and the prefabricated bottom plate of the laminated slab can be prevented from cracking during transportation and hoisting; the structure can reduce the plate thickness of the laminated slab prefabricated bottom plate, reduce the self weight of the laminated slab prefabricated bottom plate and enable the transportation and hoisting of the laminated slab to be more efficient; the lower support can be used less or not used during hoisting construction, so that the construction difficulty is reduced, and the construction efficiency is increased.

Convenient accurate positioning of reinforcing bar net piece is assembled through setting up riser 7, through utilizing pouring of riser 7, has strengthened superimposed sheet's longitudinal strength, has improved the bearing capacity.

Example 2:

in addition to embodiment 1, in order to improve the convenience and accuracy of the pouring of the prefabricated layer 21, the method also includes the following steps

The lower extreme of riser 7 is provided with location base 13, and the upper end of location base 13 is provided with the double-screw bolt 32 with riser 7 lower extreme port threaded connection, and cast-in-place layer 23 and prefabricated layer 21 are poured the shaping in casting die 1, are provided with in casting die 1 and pour inner chamber 2, and the lower extreme inner wall of pouring inner chamber 2 is provided with constant head tank 12 that cup joints with location base 13 cooperation.

Through the cooperation that sets up constant head tank 12 and location base 13 to realize the location installation of prefabricated component in pouring inner chamber 2, make hollow steel rib subassembly unsettled simultaneously, be convenient for pour the shaping.

Example 3:

in addition to embodiment 2, in order to make the concrete smoothly cast in the inner cavity of the hollow steel rib assembly during casting, notches 27 with 45-degree chamfer angles are further provided at both ends of the upper frame 3, the lower end surface of the upper frame 3 and the upper end surface of the lower frame 5 are both provided with the linearly distributed insertion rods 14, the upper end surface and the lower end surface of the connecting plate 4 are provided with insertion holes 26, and the insertion rods 14 are inserted into the insertion holes 26.

Make when pouring inside the concrete can get into vertical hollow steel rib through setting up incision 27, avoid causing hollow hole of escaping because the mobility of concrete is poor.

Example 4:

on the basis of embodiment 3, in order to realize the convenient vertical installation of the location of riser 7, the utility model also has the advantages that the lateral wall of the outer side of the connecting plate 4 is provided with a fixed eccentric rod 10 which is parallel to the lower longitudinal beam 8 and is arranged in a staggered manner, the arc outer wall of the riser 7 is provided with a locating lantern ring 30, the locating lantern ring 30 is sleeved on the fixed eccentric rod 10 in a sliding manner, and a flexible connecting sheet 31 is arranged between the locating lantern ring 30 and the outer wall of the riser 7.

Through the cooperation of setting up fixed unbalance installation 10 and position lantern ring 30, realize the vertical installation of cup jointing of riser 7, reduce the installation accuracy of riser 7 through setting up flexible connection piece 31, improve the suitability.

Example 5:

the outer edge of the upper end of the prefabricated layer 21 is provided with a chamfer, the end part of the fixed eccentric rod 10 is connected with a frame-shaped chamfer strip 11, and the chamfer inclined plane at the lower end of the chamfer strip 11 is attached to the chamfer of the prefabricated layer 21.

Realize being provided with through chamfer strip 11 and pour the chamfer on prefabricated layer 21, the chamfer can guarantee the thickness of tie point reinforcing bar protective layer on the one hand, and on the other hand can avoid cast in situ concrete corner to appear stress concentration.

Example 6:

on the basis of the embodiment 5, in order to facilitate hoisting and concrete pouring, the upper frame 3 is further provided with an upper through hole 17 which is in matched and spliced connection with the upper longitudinal beam 15, the side wall of the lower frame 5 is provided with a lower through hole 18 which is in matched and spliced connection with the lower longitudinal beam 8 in a penetrating way, the inner diameter of the lower through hole 18 is smaller than that of the upper through hole 17, the upper frame 3 and the lower frame 5 are both provided with a pair of long penetrating grooves 6 in a penetrating way, and the long penetrating grooves 6 on the upper frame 3 are connected with a hoisting assembly 22 of hoisting equipment.

Through setting up the cooperation that runs through elongated slot 6 and hoist and mount subassembly 22, the hoist and mount of being convenient for are dismantled auxiliary assembly, utilize simultaneously to run through elongated slot 6 and realize pouring inside the hollow steel rib.

Example 7:

on the basis of embodiment 6, in order to improve the pouring stability of the vertical pipe 7, a circular ring-shaped circular ring protrusion 24 is further arranged on the positioning base 13, the positioning base 13 is detached after the prefabricated layer 21 is poured, the supporting base 20 is placed in the detaching rear positioning groove 12, the prefabricated layer 21 forms an upward-concave overflow preventing groove 25 at a position corresponding to the circular ring protrusion 24, an open groove 29 is transversely arranged on the circular arc outer wall of the upper end of the vertical pipe 7 in a penetrating manner, the open groove 29 is positioned at the upper end of the prefabricated layer 21, and the open groove 29 is positioned at the lower end of the upper longitudinal and transverse positioning hole group 19.

Through set up annular arch 24 on location base 13 to form the annular anti-overflow tank 25 of circle after pouring, when secondary is pour, prevent through anti-overflow tank 25 that concrete from spilling over to the outside along supporting base 20, realize the dislocation pouring between riser 7 and the cast-in-place layer 23 through setting up opening part 29, improve the joint strength of pouring of riser 7.

A construction method realized according to the concrete composite slab with the hollow steel ribs comprises the following steps:

assembling prefabricated components, namely realizing the assembly of an upper frame 3 and a lower frame 5 through a connecting plate 4 to form a hollow steel rib component, inserting linearly distributed lower longitudinal beams 8 into the lower frame 5, sleeving a plurality of groups of vertical pipes 7 along the lower longitudinal beams 8 and fixed deflection rods 10, inserting lower transverse beams 9 into positions, corresponding to lower longitudinal and transverse positioning hole groups 28, of the vertical pipes 7, and arranging chamfer bars 11 at the end parts of the fixed deflection rods 10;

pouring a prefabricated layer, namely placing the prefabricated component in the pouring inner cavity 2, realizing suspension and accurate positioning installation of the prefabricated component through the matching of the positioning base 13 at the lower end of the vertical pipe 7 and the positioning groove 12, and forming a prefabricated layer 21 through concrete pouring;

hoisting and detaching, namely hoisting the formed prefabricated layer 21 through a hoisting assembly 22, detaching the positioning base 13 and the chamfering strip 11, forming a chamfer on the prefabricated layer 21 at the position of the chamfering strip 11, and forming a through pre-buried hole at the positions of the positioning base 13 and the stand pipe 7;

and (3) secondary installation and pouring, placing a support base 20 in the positioning groove 12 to plug the lower end port of the through embedded hole, filling the embedded hole and the hollow steel rib in the secondary pouring process to form a cast-in-situ layer 23, and forming stable staggered pouring connection between the cast-in-situ layer 23 and the vertical pipe 7 and the prefabricated layer 21 under the filling of the through long groove 6, the embedded hole and the open groove 29.

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

Claims (10)

1. The utility model provides a concrete superimposed sheet with hollow steel rib which characterized in that: the concrete composite slab includes:

the prefabricated layer (21), the middle of the prefabricated layer (21) is provided with a hollow steel rib component and a lower steel mesh component, the lower steel mesh component consists of a lower longitudinal beam (8) and a lower transverse beam (9) which are connected in a criss-cross manner, the hollow steel rib component consists of a lower frame (5), an upper frame (3) and a connecting plate (4), the connecting plate (4) is clamped and fixed between the lower frame (5) and the upper frame (3), a vertical pipe (7) is vertically arranged at the connecting position of the lower longitudinal beam (8) and the lower transverse beam (9), the lower longitudinal beam (8) penetrates through the side wall of the lower frame (5), and the outer wall of the vertical pipe (7) is provided with a lower longitudinal and transverse hole group (28) which is matched, penetrated and plugged with the lower longitudinal beam (8) and the lower transverse beam (9);

the concrete casting device comprises a cast-in-place layer (23), wherein the cast-in-place layer (23) and a prefabricated layer (21) are both cast through concrete, an upper reinforcing steel bar net piece assembly is arranged in the cast-in-place layer (23), the upper reinforcing steel bar net piece assembly is composed of an upper longitudinal beam (15) and an upper transverse beam (16), the upper longitudinal beam (15) penetrates through and is inserted into an upper frame (3), and an upper longitudinal positioning hole group (19) which is inserted into the upper longitudinal beam (15) and the upper transverse beam (16) in a matched mode is arranged on the outer wall of an arc at the upper end of a vertical pipe (7) in a longitudinal and transverse penetrating mode.

2. A concrete composite slab with a hollow steel rib as claimed in claim 1, wherein: the lower extreme of riser (7) is provided with locating base (13), and the upper end of locating base (13) is provided with stud (32) with riser (7) lower extreme port threaded connection, and cast-in-place layer (23) and prefabricated layer (21) are poured the shaping in pouring mould (1), are provided with in pouring mould (1) and pour inner chamber (2), the lower extreme inner wall of pouring inner chamber (2) is provided with constant head tank (12) that cup joints with locating base (13) cooperation.

3. A concrete composite slab with hollow steel ribs according to claim 2, characterized in that: 45-degree inverted-angle-shaped notches (27) are formed in two ends of the upper frame (3), inserting rods (14) which are linearly distributed are arranged on the lower end face of the upper frame (3) and the upper end face of the lower frame (5), inserting holes (26) are formed in the upper end face and the lower end face of the connecting plate (4), and the inserting rods (14) are inserted into the inserting holes (26).

4. A concrete composite slab with a hollow steel rib as claimed in claim 3, wherein: the outer side wall of the connecting plate (4) is provided with a fixed eccentric rod (10) which is arranged in a parallel and staggered mode with the lower longitudinal beam (8), the arc outer wall of the vertical pipe (7) is provided with a positioning sleeve ring (30), the positioning sleeve ring (30) is sleeved on the fixed eccentric rod (10) in a sliding mode, and a flexible connecting sheet (31) is arranged between the positioning sleeve ring (30) and the outer wall of the vertical pipe (7).

5. A concrete composite slab with hollow steel ribs according to claim 4, characterized in that: the upper end outer fringe on prefabricated layer (21) is provided with the chamfer, and the end connection of fixed inclined to one side pole (10) has chamfer strip (11) of frame type, chamfer inclined plane and the chamfer laminating on prefabricated layer (21) of chamfer strip (11) lower extreme chamfer inclined plane.

6. A concrete composite slab with hollow steel ribs according to claim 5, characterized in that: the upper frame (3) is provided with an upper through hole (17) which is matched and spliced with the upper longitudinal beam (15), the side wall of the lower frame (5) is provided with a lower through hole (18) which is matched and spliced with the lower longitudinal beam (8) in a penetrating manner, and the inner diameter of the lower through hole (18) is smaller than that of the upper through hole (17).

7. The concrete composite slab with the hollow steel rib as claimed in claim 1, wherein: the upper frame (3) and the lower frame (5) are respectively provided with a pair of through long grooves (6) in a penetrating mode, and the through long grooves (6) in the upper frame (3) are connected with a hoisting assembly (22) of hoisting equipment.

8. A concrete composite slab with hollow steel ribs according to claim 2, characterized in that: be provided with annular ring arch (24) of circle on location base (13), location base (13) are dismantled to prefabricated layer (21) pouring back, place support base (20) in dismantling back constant head tank (12), and prefabricated layer (21) form the anti-overflow groove (25) of upwards sunken in the position that corresponds with annular ring arch (24).

9. The concrete composite slab with the hollow steel rib as claimed in claim 1, wherein: an open slot (29) is transversely arranged on the arc outer wall of the upper end of the vertical pipe (7) in a penetrating mode, the open slot (29) is located at the upper end of the prefabricated layer (21), and the open slot (29) is located at the lower end of the upper longitudinal and transverse positioning hole group (19).

10. A construction method implemented by the concrete composite slab with the hollow steel ribs according to any one of claims 1 to 9, characterized in that: the construction method comprises the following steps:

assembling prefabricated components, namely, realizing the assembly of an upper frame (3) and a lower frame (5) through a connecting plate (4) to form a hollow steel rib component, inserting lower longitudinal beams (8) which are linearly distributed into the lower frame (5), sleeving a plurality of groups of vertical pipes (7) along the lower longitudinal beams (8) and fixed offset rods (10), inserting lower transverse beams (9) at positions of the vertical pipes (7) corresponding to lower longitudinal and transverse positioning hole groups (28), and arranging chamfering strips (11) at the end parts of the fixed offset rods (10);

pouring a prefabricated layer, namely placing the prefabricated component in a pouring inner cavity (2), realizing suspension and accurate positioning installation of the prefabricated component through the matching of a positioning base (13) at the lower end of a vertical pipe (7) and a positioning groove (12), and forming the prefabricated layer (21) through concrete pouring;

hoisting and disassembling, namely hoisting the molded prefabricated layer (21) through a hoisting assembly (22), disassembling the positioning base (13) and the chamfering strip (11), forming a chamfer on the prefabricated layer (21) at the position of the chamfering strip (11), and forming a through pre-buried hole at the positions of the positioning base (13) and the stand pipe (7);

and (2) secondary installation pouring, wherein a support base (20) is placed in the positioning groove (12) to plug the lower end port of the through embedded hole, the embedded hole and the hollow steel rib are filled in the secondary pouring process to form a cast-in-situ layer (23), and the cast-in-situ layer (23) is stably connected with the vertical pipe (7) and the prefabricated layer (21) in a staggered pouring mode under the filling of the through elongated slot (6), the embedded hole and the open slot (29).

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