CN107023078A - Assemble cast-in-place combined type superposed box mesh-beam floor system and construction method - Google Patents

Abstract

The invention relates to an assembled cast-in-place combined composite box-mesh girder floor, which mainly includes laminated boxes, rib beams, tie rods, bolt bars, shear grooves, rib beam prefabricated slabs, bonded prestressed tendons, rib columns, Suspenders, etc. During the construction of the assembled cast-in-place combined composite box-mesh girder floor of the present invention, the composite box side panels, bottom panels and top panels are hoisted after being assembled on site, and the rib beams are provided with prefabricated bottom panels and top sealing panels that run through multiple boxes. Bonded prestressed tendons are set inside the beam to ensure the overall strength of the rib beam. The entire construction process is easy to operate, which facilitates construction and management, and has good economic and technical benefits.

Description

Assembled cast-in-place combined composite box-net girder floor and its construction method

technical field

The invention relates to a combined composite box-net beam floor, in particular to an assembly-in-place combined composite box-net beam floor, which belongs to the field of house construction.

Background technique

As people's demand for large space increases, the mesh girder floor structure can achieve large span and large space, the height of the beam and slab is the same, and the non-prestressed form can reach a span of 33m, and the construction supporting formwork is flat and simple, saving, and the box body The split is light in weight, easy to transport and combined installation, and the simple construction technology is beneficial to shorten the construction period. Because of its light weight, high bearing capacity, and a larger structural height can be selected to form a beam-slab composite section, the seismic force generated by light weight is small , so its anti-seismic performance is good, the overall rigidity is very large, the deflection deformation and corner deformation are small, and the torsion effect on the floor edge beam is much smaller than that of ordinary floors. Nowadays, shopping malls, libraries, underground garages, teaching buildings, office buildings , sports training halls, etc. There are more and more buildings with large spans and large spaces. The traditional cast-in-place reinforced concrete floor slabs can no longer meet the requirements. The matching formwork is flat, simple, economical, the box body is light in weight, easy to transport and assemble, and the construction process is simple.

However, in the traditional construction method, the connection between the side walls of adjacent laminated boxes is not very strong, which may easily lead to leakage at the joints. At the same time, when the rib beam is poured, the side wall of the laminated box will be deformed and destroyed, resulting in waste of materials and labor.

In view of this, in order to overcome the defects existing in the prior art, it is urgent to invent a simple and effective assembly cast-in-place combined composite box-mesh girder floor and its construction method, so as to improve the construction of the assembly-place composite composite box-net beam floor. Quality and construction efficiency.

Contents of the invention

The purpose of the present invention is to improve the technical problems of the traditional assembled cast-in-place combined composite box-mesh girder floor construction method, the connection between the side walls of adjacent laminated boxes is not strong, etc. Floor construction quality and construction efficiency.

To achieve the above object, the present invention adopts the following technical solutions:

Assemble the cast-in-place combined composite box-mesh girder floor, including laminated boxes, rib beams, tie rods, bolts, shear grooves, prefabricated bottom slabs for rib beams, prefabricated top seal panels for rib beams, bonded prestressed tendons, and rib columns , hanging ribs and occlusal grooves; the bottom plate of the laminated box is connected with the side plate by a bolt, and the straight thread sleeve on the upper side of the side plate is connected with the top plate by a bolt; the lower part of the rib beam is provided with a rib beam prefabricated bottom plate, and There is a prefabricated rib beam top sealing plate, with bonded prestressed tendons inside, hanging ribs on the rib beam prefabricated bottom plate, and grouting holes on the rib beam prefabricated top sealing plate.

The two ends of the bottom plate of the composite box are provided with concrete protrusions, and there are bolt holes inside the protrusions, bottom plate grooves in the middle of the bottom plate, rib columns in the bottom plate grooves, bolt holes at the bottom of the side plates, bottom plate and The side plates are connected by bolts; the top of the side plates is provided with a pre-embedded straight thread sleeve, the top plate is provided with shear grooves and exposed reinforcement shear grooves, the two ends of the top plate are provided with concrete protrusions, and the interior of the protrusions is provided with bolt holes. The rib column is set in the shear groove, and the top plate and the side plate are connected by bolts.

The bottom of the rib column is placed in the groove of the bottom plate, and the top is placed in the shear force groove. The middle part is symmetrically provided with a plurality of straight threaded sleeves, and the straight threaded sleeves are provided with tie rods.

One end of the pull rod is conical and one end is threaded, the conical end is placed on the side plate, and the other end is placed on the straight thread sleeve.

The prefabricated bottom plate of the rib beam and the prefabricated top seal plate of the rib beam are provided with occlusal grooves on the outer side of the prefabricated roof seal plate to occlude and connect with the shear teeth of the laminated box. Place it on the stress rib at the bottom of the laminated box, and place the long hanging rib on the stress rib at the top of the laminated box.

There are two bonded prestressed tendons inside the rib beam.

The rib beam prefabricated bottom plate and the rib beam prefabricated top seal plate connect two or three vertical and horizontal laminated boxes as a whole. After pouring.

The upper part of the composite box is poured with concrete, and the upper steel bars are placed in the exposed bar shear grooves on the roof.

A construction method for assembling a cast-in-place combined composite box-mesh girder floor, comprising the following steps:

1) Fabrication of laminated boxes: make the bottom plate, top plate and side panels of the laminated box in the factory according to the design drawing;

2) Laminated box installation: Assemble the stacked box on site, place the bottom plate on the flat ground, use bolts to connect the side plates to the bottom plate, then place the rib columns, screw the tie rods around the rib columns to fix them, and finally cover the top plate with bolts Rods connect the top plate with the side plates;

3) Place the ribbed prefabricated floor: accurately place the ribbed prefabricated floor according to the set-out line, and the steel bars at the junction of the longitudinal plate and the transverse plate are exposed;

4) Hoisting of the stacked box: Use a tower crane to lift the stacked box to the predetermined position;

5) Connection between the laminated box and the prefabricated floor of the rib beam: check the position of the laminated box and the prefabricated floor of the rib beam, so that the shear teeth of the laminated box and the occlusal grooves of the prefabricated floor of the rib beam are occluded and fixed, and the hanging ribs are bent so that the hanging ribs and the prefabricated floor of the rib beam are fixed. The tension reinforcement of the laminated box is suspended and connected;

6) Set bonded prestressed tendons: After the rib beam reinforcement is bound, set bonded prestressed tendons at intervals of 1 to 2 meters in the middle of the rib beam;

7) Place the rib beam prefabricated top seal plate: place the rib beam prefabricated top seal plate according to the drawings, and the occlusal groove of the rib beam prefabricated top seal plate is occlusally connected with the shear teeth of the laminated box;

8) Concrete pouring: grout and vibrate the concrete inside the rib beam through the grouting hole on the rib beam prefabricated top seal plate.

The present invention has following characteristics and beneficial effect:

(1) The side plates, top plate and bottom plate of the laminated box are hoisted in place after being assembled at the construction site, which simplifies the construction method.

(2) The side plates of the laminated box are connected with the bottom plate and the top plate by bolts to prevent grout leakage. Rib columns and tie rods are installed inside to prevent the laminated box from being deformed during the concrete pouring process.

(3) The laminated box and the rib beam are connected by the hanging bars of the rib beam prefabricated floor, and the rib beam is provided with a rib beam prefabricated roof to ensure the strength and stability of the rib beam.

Description of drawings

Fig. 1 is the schematic diagram of the assembled cast-in-place combined type laminated box net girder floor of the present invention;

Fig. 2 is a schematic diagram of a combined stacked box;

Fig. 3 is a perspective view of a combined stacked box;

Fig. 4 is a schematic diagram of the rib beam prefabricated roof connection structure;

Among them: 1. Laminated box 2. Top plate 3. Bottom plate 4. Side plate 5. Bolt rod 6. Straight thread sleeve 7. Pull rod 8. Rib column 9. Shear groove 10. Stress rib 11. Shear tooth 12 .Bottom groove 13. Exposed reinforcement shear groove 14. Rib beam 15. Rib beam prefabricated bottom plate 16. Bonded prestressed tendon 17. Hanging rib 18. Rib beam prefabricated top seal plate 19. Grouting hole 20. Rib beam prefabricated plate Main rib 21. Occlusion groove 22. Horizontal plate 23. Longitudinal plate.

detailed description

Formwork supporting technical requirements, concrete pouring construction technical requirements, steel bar binding technical requirements, etc., will not be repeated in the present invention, and the embodiments of the structure related to the present invention will be focused on.

Fig. 1 is the structural schematic diagram of assembly cast-in-place combined type laminated box net girder floor and construction method of the present invention, assemble cast-in-place combined type laminated box net beam floor, the thickness of the laminated box exposed box bottom plate is 80mm, and the thickness of the exposed box top plate 120mm, the side wall of the laminated box is thin-walled, the thickness is 10mm, and the height of the laminated box is 450mm. The width of the rib beam is 100mm, the tie rod is an iron rod with a tapered bottom, the diameter of the tapered bottom is 50mm, the diameter of the rod is 10mm, the diameter of the bolt rod is 5mm and the nut with an inner diameter of 6mm, the depth of the shear groove is 30mm, the width of the square is 55mm, and the thickness of the prefabricated bottom plate of the rib beam 10mm, rib beam prefabricated top seal plate thickness 10mm, the length is the width of three laminated boxes, the diameter of the bonded prestressed tendon is 18mm, the rib column is a wooden square rod, the side width is 50mm, and the upper part is arranged with a 12mm diameter straight thread sleeve, The diameter of the hanging bar is 18mm; the depth of the exposed bar shear groove is 20mm, and the side width is 50mm. The bottom plate is equipped with a bottom plate groove of 30mm and a square width of 50mm.

The prefabricated bottom plate of the rib beam and the prefabricated top seal plate of the rib beam are provided with occlusal grooves on the outside to occlude with the shear teeth of the laminated box. The bottom plate is equipped with hanging bars with a diameter of 18mm. The length of the hanging bar is 600mm, the short hanging bar is placed on the stressed bar at the bottom of the laminated box, and the diameter of the stressed bar is 28mm, and the long hanging bar is placed on the stressed bar at the top of the laminated box.

Figure 2 is a schematic diagram of a combined stacked box, and Figure 3 is a perspective view of a combined stacked box, as shown in Figures 2 to 3, there are concrete protrusions at both ends of the bottom plate of the stacked box, the height of which is 15 mm, and bolts are provided inside the protrusions Rod hole, hole diameter 6mm, the middle part of the bottom plate is equipped with bottom plate groove depth 20mm, side width 52mm, rib column is arranged in the groove, rib column is a wooden square rod, side width 50mm, bolt hole is provided at the bottom of the side plate, the hole diameter 6mm, the bottom plate and the side plate are connected by a bolt 5; the top of the side plate is equipped with a pre-embedded straight thread sleeve with an inner diameter of 6mm, and the top plate is equipped with a shear groove and a shear groove with exposed reinforcement. The depth of the shear groove is 30mm, and the square width is 55mm , the depth of the shear groove with exposed reinforcement is 20mm, and the width of the side is 50mm. The post-casting layer steel bars can be set in the shear groove with exposed reinforcement. Concrete protrusions are provided at both ends of the top plate, and bolt holes are provided inside the protrusions. The rib column, the top plate and the side plate are connected by bolts. The bottom of the rib column is placed in the groove of the bottom plate, and the top is placed in the shear groove of the top plate. Four straight threaded sleeves with a diameter of 12mm are symmetrically arranged in the middle, and tie rods with a diameter of 10mm are arranged on the straight threaded sleeves.

Figure 4 is a schematic diagram of the connection structure of the prefabricated ribbed roof. The prefabricated bottom plate of the ribbed beam and the prefabricated roofing plate of the ribbed beam shown in Figure 4 connect the vertical and horizontal three laminated boxes into a whole. The steel bars at the junction of the longitudinal slab and the transverse slab are exposed, and post-casting during construction.

The present invention also provides a construction method for assembling a cast-in-place combined composite box-mesh girder floor, which includes the following steps:

1) Fabrication of the laminated box 1: manufacture the bottom plate 3, the top plate 2, and the side plate 4 of the laminated box 1 in the factory according to the design drawing.

2) Lamination box 1 installation: Assemble the stacking box 1 on site, place the bottom plate 3 on the flat ground, connect the side plate 4 and the bottom plate 4 with bolts 5, then place the rib column 8, screw the tie rod 7 around the rib column 8 Fix, and finally cover the top plate 2, and use the bolt rod 5 to connect the top plate 2 with the side plate 4.

3) Place the ribbed prefabricated floor 15: accurately place the ribbed prefabricated floor 15 according to the setting-out line, and the steel bars at the junction of the longitudinal plate 23 and the transverse plate 22 are exposed.

4) Hoisting of the stacked box 1: the stacked box 1 is hoisted to the predetermined position by a tower crane.

5) The laminated box 1 is connected to the ribbed prefabricated floor 15: check the position of the laminated box 1 and the ribbed prefabricated floor 15, so that the shear teeth 11 of the laminated box and the occlusal grooves 21 of the ribbed prefabricated floor 15 are occluded and fixed. Bending the hanging ribs 17 makes the hanging ribs and the laminated box 1 stress ribs 10 suspended and connected.

6) Install bonded prestressed tendons 16: After the steel bars of the rib beam 14 are bound, set bonded prestressed tendons 16 at intervals of 1 to 2 meters in the middle of the rib beam 14.

7) Place the rib beam prefabricated top seal 18: place the prefabricated top seal 18 according to the drawings, and the occlusal groove 21 of the top seal is occlusally connected with the shear teeth 11 of the laminated box 1.

8) Concrete pouring: grouting and vibrating concrete into the interior of the rib beam 14 through the grouting hole 19 on the prefabricated top sealing plate 18 .

Claims (9)

1. the cast-in-place combined type superposed box mesh-beam floor system of one kind assembling, it is characterised in that including superposed box (1), girt strip (14), pull bar (7), tightening latch (5), shearing groove (9), girt strip prefabricated panel (15), the prefabricated top sealing plate of girt strip (18), binding prestress reinforcement (16), rib Post (8), hangs muscle (17) and occlusal crib (21)；The bottom plate (3) of the superposed box (1) is connected with side plate (4) using tightening latch (5), side Plate (4) top sets straight screw sleeve (6) to be connected with top plate (2) using tightening latch (5)；Girt strip (14) bottom is pre- provided with girt strip Bottom plate (15) processed, top is provided with the prefabricated top sealing plate of girt strip (18), and inside is provided with binding prestress reinforcement (16), girt strip prefabricated panel (15) hangs muscle (17) is provided with, the prefabricated top sealing plate of girt strip (18) is provided with grout hole (19).

2. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：Superposed box (1) Bottom plate (3) two ends are raised provided with concrete, and lobed interior, which is provided with the middle part of tightening latch hole, bottom plate (3), is provided with bottom plate groove (12), bottom plate Rib post (8) is provided with groove (12), side plate (4) bottom is provided with tightening latch hole, and bottom plate (3) is connected with side plate (4) by tightening latch (5)； Pre-buried straight screw sleeve (6) is provided with the top of side plate (4), top plate (2) is provided with shearing groove (9) and dew muscle shearing groove (13), top plate (2) Two ends are raised provided with concrete, and lobed interior, which is provided with tightening latch hole, shearing groove (9), sets rib post (8), top plate (2) and side plate (4) Connected by tightening latch (5).

3. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：The rib post (8) Bottom is placed in bottom plate groove (12), and top is placed in shearing groove (9), and middle part is arranged with multiple straight screw sleeves (6), straight spiral shell Line sleeve (6) is provided with pull bar (7).

4. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：The pull bar (7) One end is conical one end mantle fiber, and conical end is placed on side plate (4), and the other end is placed on straight screw sleeve (6).

5. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：Girt strip prefabricated panel (15) and on the outside of the prefabricated top sealing plate of girt strip (18) provided with occlusal crib (21) it is connected with superposed box shearing tooth (11), bottom plate (3) Hangs muscle (17) is provided with, hangs muscle (17) is two drop shot muscle, a long hangs muscles, and drop shot muscle is placed in superposed box (1) bottom principal rod (10) on, long hangs muscle is placed at the top of superposed box (1) on principal rod (10).

6. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：Girt strip (14) is internal Provided with twice binding prestress reinforcement (16).

7. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：Girt strip prefabricated panel (15) and the prefabricated top sealing plate of girt strip (18) vertically and horizontally 2 or 3 superposed boxes (1) will be connected as entirety, girt strip prefabricated panel (15), The prefabricated top sealing plate of girt strip (18), stringer board (23) and transverse slat (22) intersection reinforcing steel bars exposed, during construction after pour.

8. the cast-in-place combined type superposed box mesh-beam floor system of assembling according to claim 1, it is characterised in that：On superposed box (1) Portion has poured concrete, and upper reinforcement is placed in the dew muscle shearing groove (13) on top plate (2).

9. a kind of construction method for assembling cast-in-place combined type superposed box mesh-beam floor system, it is characterised in that comprise the following steps：

1) superposed box (1) makes：Bottom plate (3), top plate (2), the side plate (4) of superposed box (1) are made in factory according to design drawing；

2) superposed box (1) is installed：Assembling superposed box (1), bottom plate (3) is placed on level land, using tightening latch (5) by side plate (4) It is connected with bottom plate (3), is subsequently placed with rib post (8), rib post (8) surrounding is screwed on pull bar (7) surrounding and fixed, and finally covers top plate (2), Top plate (2) is connected with side plate (4) using tightening latch (5)；

3) girt strip prefabricated panel (15) is placed：Girt strip prefabricated panel (15), stringer board (23) and transverse slat are accurately placed according to unwrapping wire (22) intersection reinforcing bar is exposed；

4) superposed box (1) is lifted：Superposed box (1) is lifted to by precalculated position using tower crane；

5) superposed box (1) is connected with girt strip prefabricated panel (15)：Superposed box (1) and girt strip prefabricated panel (15) position are checked, is made The shearing tooth (11) of superposed box is engaged fixation with the occlusal crib (21) of girt strip prefabricated panel (15), and bending hangs muscle (17) makes hangs muscle (17) it is connected with principal rod (10) suspension of superposed box (1)；

6) binding prestress reinforcement (16) is set：1~2 meter of the interval setting in the middle part of girt strip (14) after girt strip (14) reinforcing bar colligation is finished Binding prestress reinforcement (16)；

7) the prefabricated top sealing plate of girt strip (18) is placed：The prefabricated top sealing plate of girt strip (18), the prefabricated top sealing plate of girt strip (18) are placed by drawing The shearing tooth (11) of occlusal crib (21) and superposed box (1) be connected；

8) concreting：Vibrated by the grout hole (19) on the prefabricated top sealing plate of girt strip (18) to grouting inside girt strip (14) mixed Solidifying soil.