Fabricated superposed flat slab structure

Abstract

The utility model discloses an assembly type overlapped flat slab structure, which is characterized in that all components adopt prefabricated components including a prefabricated column structure, an overlapped column cap structure and an overlapped floor slab structure, the prefabricated components are prefabricated in a factory and conveyed to a construction site to be assembled, and concrete is poured on an overlapped layer to form a whole. Limiting devices are arranged at the side ends, close to the bottom, of the prefabricated column structures, composite column cap structure supporting devices are installed on the side walls, supporting and fixing devices are arranged on the side walls, close to the middle, of the prefabricated column structures, and supporting frames are arranged on the lower portions of the composite column cap structures and the lower portions of the composite floor slab structures. Most structural members of a flat slab system are prefabricated, on-site steel bar binding work amount and concrete pouring work amount are reduced, a continuous all-round scaffold does not need to be erected, steel bars between the members and reserved holes do not need to be accurately aligned, member quality is improved, construction efficiency is greatly improved, and construction cost is reduced. And the construction and installation accuracy and quality are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building assembly, especially a kind of assembly type composite beam-free floor structure. BACKGROUND

[0002] In recent years, China actively explores the development of prefabricated building, mainly including assembly integral frame structure, assembly integral shear wall structure and assembly integral frame-shear wall structure;However, there is no suitable prefabricated structure and assembly method for beam-free floor structure.

[0003] The existing prefabricated solid column node structure reserves groove at the bottom of upper prefabricated solid column, sleeve is embedded in the groove, and the steel bars in the upper prefabricated solid column are connected with the upper end of the sleeve. The steel bars in the lower prefabricated solid column extend out of the end of the prefabricated column and into the sleeve in the groove at the bottom of the upper prefabricated solid column, and then grouting material is used to grout into the sleeve to form a connection. However, this grouting method requires high construction technology and on-site installation of workers, and a large amount of time is consumed for installing the sleeve, the quality of grouting material is also very high, the construction process is often difficult to grout densely, the means for detecting the density of grouting material is simple, and it is difficult to ensure the construction quality, and for large-size prefabricated columns, the weight is too large, large-size tower cranes need to be used, which affects the construction efficiency.

[0004] Moreover, when this method is applied to beam-free floor structure system, especially when the column and the surrounding prefabricated floor need to be connected, the construction is more complicated. In the structure system with beam structure, the prefabricated floor and the prefabricated column only need to be post-poured after the steel bars are thrown, but in the beam-free floor structure system, the floor also needs to be connected with the prefabricated column, and according to the connection method of beam structure and column structure, the horizontal sleeve reserved on the floor and the column needs to be inserted, which requires high requirements for the reserved position of steel bars and the process performance of sleeve, and a large amount of time is consumed for installing the sleeve.

[0005] At the same time, when installing the prefabricated column, a large amount of supporting structure needs to be aligned and supported for positioning, which will intersect with the full-set scaffold for surrounding prefabricated floor, and the construction site is complex.

[0006] Therefore, there is an urgent need for an assembly type composite beam-free floor system that can solve the above problems. INVENTION CONTENTS

[0007] The utility model aims to provide an assembly type composite beam-free floor structure, to solve the technical problems that the existing assembly system cannot be applied to beam-free floor structure system, a large amount of time is wasted for installing the sleeve, the supporting structure for installing the prefabricated column intersects with the full-set scaffold for surrounding prefabricated floor, and the construction site is complex.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme:

[0009] The assembled composite beam-free floor structure comprises an assembled structure, a foundation structure, a prefabricated column structure, a composite column cap structure and a composite floor structure.

[0010] The bottom of the prefabricated column structure is fixedly connected to the foundation structure, the composite column cap structure is sleeved around the prefabricated column structure, the composite floor structure comprises a cap-interim floor directly connected to the prefabricated column structure, the cap-interim floor is fixedly connected to the composite column cap structures on the two sides, and the composite floor structure further comprises an inter-floor, which is arranged between adjacent cap-interim floors and has a reserved cast-in-situ joint between the edges of the inter-floor and the edges of the cap-interim floor.

[0011] The composite column cap structure comprises a column cap composite part and a column cap cast-in-situ part, the cap-interim floor comprises a cap-interim composite part and a cap-interim cast-in-situ part, the column cap composite part is integrally connected to the cap-interim composite part, the inter-floor comprises an inter-floor composite part and an inter-floor cast-in-situ part, and the concrete of the column cap cast-in-situ part, the cap-interim cast-in-situ part, the inter-floor cast-in-situ part and the cast-in-situ joint is integrally casted post-poured concrete.

[0012] The thickness of the composite column cap structure is greater than that of the composite floor structure, the bottom elevation of the column cap composite part is lower than that of the cap-interim composite part, and the upper surfaces of the composite column cap structure and the composite floor structure are flush.

[0013] The inner edge of the column cap composite part abuts against the outer wall surface of the prefabricated column structure, the outer edge of the column cap composite part is connected to the inner edge bottom edge of the cap-interim composite part, and the post-poured concrete and the surface of the prefabricated column structure are fixedly connected through key groove engagement.

[0014] The column cap composite part is internally embedded with column cap embedded bars, the part of the column cap embedded bars that extends out of the column cap composite part and is located within the range of the column cap cast-in-situ part is further provided with horizontal column cap connecting bars, the cap-interim composite part is internally embedded with connecting plate bars that are arranged in the length direction and inserted into the column cap cast-in-situ part, and the connecting plate bars and the column cap connecting bars are one-to-one correspondingly arranged and double-sidedly welded.

[0015] The support structure comprises a prefabricated column support structure, the prefabricated column support structure comprises a column bottom limiting assembly and a column side support rod, the column bottom limiting assembly is a type steel sleeve that is arranged around the column bottom, the type steel sleeve is fixedly connected to the top surface of the foundation structure, the size of the type steel sleeve is adapted to the size of the bottom of the prefabricated column structure, the bottom of the prefabricated column structure is seated in the type steel sleeve, the bottom end of the column side support rod is detachably connected to the top surface of the foundation structure, and the top end of the column side support rod is adjustably connected to the side wall surface of the prefabricated column structure.

[0016] The support structure further comprises a horizontal member support structure, which comprises scaffold supports arranged at the bottom of the column cap joint and the cap joint, and a row of scaffold supports is arranged at the bottom of the column cap joint.

[0017] The scaffold support comprises a support joist, vertical supports, horizontal supports and diagonal supports, the support joist is arranged at the top of the vertical supports and at the bottom of the column cap joint and the cap joint, the bottom of the vertical supports stands on the top surface of the foundation structure, the horizontal supports are horizontally connected between the vertical supports, the vertical supports and the horizontal supports enclose a support frame, and the diagonal supports are connected at the diagonal positions of the support frame.

[0018] The horizontal member support structure further comprises bracket supports connected to the side walls of the prefabricated column structure and arranged at the bottom of the column cap joint.

[0019] The bracket supports are enclosed around the side walls of the prefabricated column structure, the bracket supports comprise two parallel long brackets and two parallel short brackets, the long brackets extend out of the prefabricated column structure, the two ends of the short brackets are tightly connected to the top of the long brackets on the two sides, and the long brackets and the short brackets are detachably connected to the surface of the side walls of the prefabricated column structure through anchor bolts.

[0020] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0021] The utility model discloses a column cap structure is arranged between the prefabricated column and the floor slab, and a beam-free floor system is formed, wherein the column cap structure and the floor slab are all composite structures, prefabricated construction is guaranteed, the prefabricated column is completed in a factory and is transported to a construction site for assembly, and the whole is formed by pouring concrete on the composite layer.Compared with the traditional construction technology, the construction method has the characteristics of fast construction speed, short construction period, high production efficiency and good product quality, and most of the structural members of the beam-free floor system are prefabricated, so that the amount of on-site steel binding and the amount of concrete pouring are reduced.

[0022] The utility model discloses a column bottom limiting assembly and column side support rod combination are combined to prefabricated column installation limiting, satisfy the installation needs of prefabricated column.

[0023] The utility model discloses a column cap position sets up a row of scaffold and bracket support, and the scaffold does not need to be continuously arranged at the position, and the column side support rod and the scaffold have sufficient erection environment.

[0024] The utility model discloses a prefabricated column around design composite column cap structure, and the column cap cast-in-place part and the cap interlaminar composite part are aligned, and the composite column cap structure and the cap interlaminar floor slab do not need the precise positioning between the reinforcing steel bars and the reserved hole of component, only need the reinforcing steel bar of column cap cast-in-place part and cap interlaminar composite part reservation welding, then integrally cast concrete can, the connection between prefabricated column and floor slab is converted into the connection between prefabricated column and composite column cap structure, effectively solve the quality detection problem of the complex connection mode between traditional prefabricated column and the problem that column plate core area reinforcing steel bar is not easy to bind construction, simplify the construction technology of connection, solve the problem of long construction period of traditional construction method, improve component quality, greatly improve construction efficiency, guarantee construction installation accuracy and quality.

[0025] The utility model fully applies spacing device, supporting device and seat paste craft, and the bottom of prefabricated column structure and foundation structure adopt seat paste craft, can greatly improve prefabricated component assembly rate, shorten construction period and reduce cost under satisfying the stress requirement of construction installation stage and normal working stage. DRAWINGS

[0026] The utility model will be further explained in detail in combination with the drawings.

[0027] Figure 1 It is the plane structure schematic diagram of the utility model.

[0028] Figure 2 It is the side structure schematic diagram of the utility model.

[0029] Figure 3 It is the structure schematic diagram of the column bottom spacing subassembly of the utility model.

[0030] Figure 4 It is the structure schematic diagram of the bracket support of the utility model.

[0031] Figure legend: 1 - foundation structure, 2 - prefabricated column structure, 3 - composite column cap structure, 31 - column cap composite part, 32 - column cap cast-in-place part, 33 - column cap embedded bar, 34 - column cap connecting bar, 4 - cap interlaminar floor slab, 41 - cap interlaminar composite part, 42 - cap interlaminar cast-in-place part, 43 - connecting plate bar, 5 - interlaminar floor slab, 6 - cast-in-place joint, 7 - column bottom spacing subassembly, 8 - column side support rod, 9 - scaffold support, 91 - support furring, 92 - vertical support, 93 - horizontal support, 94 - inclined support, 10 - bracket support, 101 - long bracket, 102 - short bracket, 103 - anchor bolt. SPECIFIC IMPLEMENTATION

[0032] The embodiment is seen Figures 1-4As shown, a prefabricated composite beam-free floor structure includes a prefabricated structure, the prefabricated structure includes a foundation structure 1, a prefabricated column structure 2, a composite column cap structure 3 and a composite floor structure, and the prefabricated structure is supported on the top surface of the foundation structure 1 by a support structure.

[0033] The bottom of the prefabricated column structure 2 is fixedly connected to the foundation structure 1, the composite column cap structure 3 is sleeved around the prefabricated column structure 2, the composite floor structure includes a cap-interim floor 4 directly connected to the prefabricated column structure 2, the cap-interim floor 4 is fixedly connected to the composite column cap structure 3 on both sides, and the composite floor structure further includes an inter-floor slab 5 arranged between adjacent cap-interim floors 4, and a cast-in-place joint 6 is reserved between the edges of the inter-floor slab 5 and the edges of the cap-interim floor 4.

[0034] The composite column cap structure 3 includes a column cap composite part 31 and a column cap cast-in-place part 32, the cap-interim floor 4 includes a cap-interim composite part 41 and a cap-interim cast-in-place part 42, the column cap composite part 31 is integrated with the cap-interim composite part 41, the inter-floor slab 5 includes an inter-floor composite part and an inter-floor cast-in-place part, and the concrete of the column cap cast-in-place part 32, the cap-interim cast-in-place part 42, the inter-floor cast-in-place part and the cast-in-place joint 6 is post-cast concrete.

[0035] The thickness of the composite column cap structure 3 is greater than the thickness of the composite floor structure, the bottom elevation of the column cap composite part 31 is below the bottom elevation of the cap-interim composite part 41, and the composite column cap structure 3 is flush with the upper surface of the composite floor structure.

[0036] The inner edge of the column cap composite part 31 abuts against the outer wall surface of the prefabricated column structure 2, and the outer edge of the column cap composite part 31 is connected to the inner edge bottom edge of the cap-interim composite part 41. The surface of the post-cast concrete and the prefabricated column structure 2 are fixedly connected through key groove engagement.

[0037] The column cap composite part 31 is pre-buried with a column cap pre-buried rib 33, the part of the column cap pre-buried rib 33 extending out of the column cap composite part 31 and located in the range of the column cap cast-in-place part 32 is further provided with a horizontal column cap connecting rib 34, the cap-interim composite part 41 is pre-buried with a connecting plate rib 43 arranged in length and inserted into the column cap cast-in-place part 32, and the connecting plate rib 43 and the column cap connecting rib 34 are one-to-one correspondingly arranged and double-sidedly welded and connected.

[0038] The support structure includes a prefabricated column support structure, the prefabricated column support structure includes a column bottom limiting assembly 7 and a column side support rod 8, the column bottom limiting assembly 7 is a type steel sleeve arranged around the column bottom, the type steel sleeve is fixedly connected to the top surface of the foundation structure 1, the size of the type steel sleeve is adapted to the size of the bottom of the prefabricated column structure 2, the bottom of the prefabricated column structure 2 is seated in the type steel sleeve, the bottom end of the column side support rod 8 is detachably connected to the top surface of the foundation structure 1, and the top end of the column side support rod 8 is adjustably connected to the side wall surface of the prefabricated column structure 2.

[0039] The support structure further comprises a horizontal member support structure, which comprises scaffold supports 9 arranged at the bottom of the column cap joint 31 and the cap joint 41, and a row of scaffold supports 9 is arranged at the bottom of the column cap joint 31.

[0040] The scaffold support 9 comprises a support joist 91, a vertical support 92, a horizontal support 93, and an inclined support 94. The support joist 91 is arranged at the top of the vertical support 92 and arranged at the bottom of the column cap joint 31 and the cap joint 41. The bottom of the vertical support 92 stands on the top surface of the foundation structure 1. The horizontal support 93 is connected between the vertical supports 92. The vertical supports 92 and the horizontal support 93 form a support frame. The inclined support 94 is connected at the diagonal position of the support frame.

[0041] The horizontal member support structure further comprises a bracket support 10 connected to the side wall of the prefabricated column structure 2 and arranged at the bottom of the column cap joint 31.

[0042] The bracket support 10 is arranged around the side wall of the prefabricated column structure 2. The bracket support 10 comprises two parallel long brackets 101 and two parallel short brackets 102. The end of the long bracket 101 extends out of the prefabricated column structure 2. The two ends of the short bracket 102 are tightly connected to the top of the long bracket 101 on both sides. The long bracket 101 and the short bracket 102 are detachably connected to the surface of the side wall of the prefabricated column structure 2 by anchor bolts 103.

[0043] The construction method of the assembled composite non-beam floor structure is as follows:

[0044] Step one: Determine the position of the prefabricated column structure 2 on the surface of the foundation structure 1 and measure the line.

[0045] Step two: Install the bracket support 10 on the four sides of the prefabricated column structure 2. Use bolts to fasten the bracket support 10 to the bolt sleeve reserved on the column body of the prefabricated column structure 2 for temporary support of the prefabricated composite column cap and column joint sealing.

[0046] Step two: Install the column bottom limiting assembly 7 at the bottom of two adjacent corner positions of the prefabricated column structure 2. The column bottom limiting assembly is formed by splicing two L-shaped pieces. First, install one L-shaped piece.

[0047] Step three: Wet the column bottom seat grouting position of the prefabricated column structure with water. Use seat grouting material to fully seat grouting at the column bottom. The seat grouting height is 1 cm higher than the joint height. Use a trowel to finish, with the middle high and the periphery low. The low point should not be lower than the joint height. If it is found during the adjustment of the verticality that there is a part of the component edge where the seat grouting material does not overflow, immediately lift and add seat grouting material at the missing part and re-level the slope.

[0048] Step four, set rubber tires or 2 layers of 10mm x 10mm wood at the column bottom pad of the prefabricated column structure 1, and pad the upper soft pad, and bind the traction rope at a position about 1m away from the column bottom. If the prefabricated column structure 1 shakes after being turned over, pull the traction rope to keep balance, and use the tower crane to hoist it after being turned over through the reserved lifting ring of the prefabricated column structure 1. Before hoisting, the quality person in charge checks the number and size of the prefabricated column structure 1, and checks the quality. After checking that the quality is correct, a person in charge is responsible for hooking. When the hooking personnel retreat to the safe area, the signal worker confirms the safety situation around the component, commands slow hoisting, and continues hoisting after the tower crane hoisting is determined to be safe. After the prefabricated column structure is lowered to a distance of 500mm from the foundation structure, the column bottom limiting assembly 7 and the control line are adjusted. After the fine adjustment is completed, the lowering is slowed down. Two professional operators guide the landing by hand. When landing to 100mm, one worker observes whether the edge line of the column is aligned with the horizontal positioning line through plumb observation. After the prefabricated column structure 1 is in place, the elevation is rechecked using a level. After each column is hoisted, it must be rechecked.

[0049] Step five, install the last L-shaped piece, install the column side support rod 8 and perform verticality retest and adjustment. Two theodolites are used to observe whether the column top center line and the ground control line coincide on both sides of the column. If the column top center line and the ground control line coincide on both sides of the column, the verticality meets the specification requirements. Otherwise, the verticality is adjusted through the adjustable length of the inclined brace until the verticality meets the requirements.

[0050] Step six, set up a scaffold support and a plate joint position form under the hat intermediate floor and the composite column cap structure:

[0051] First, place the vertical support 92 according to the support planar arrangement scheme, 4 as a basic assembly unit. Then, install the horizontal support 93 and the inclined support 94 at the same time, and knock the upper disc buckle tightly to make the node fast. Take this basic unit as the starting point to install other support frame unit members, adjust and reinforce as you install, and finally install the upper adjustable support. Thus, the entire frame body is completed, and finally the upper support keel 91 is installed.

[0052] Step seven, hoist the column cap composite part and install the column cap composite part:

[0053] Before hoisting, the quality responsible person checks the number and size of the column cap overlap 31, and checks the quality. After the special person responsible for hooking, when the hooking personnel retreat to the safe area, the signal worker below confirms the safety of the components around, commands slow lifting, and when the lifting is about 500mm away from the ground, the tower crane lifting is safe, and the lifting continues. When the column cap overlap 31 is hoisted to the position above the prefabricated column structure 2, the traction rope is pulled to fine-tune the position of the column cap overlap 31, so that the center of the column cap overlap 31 is aligned with the prefabricated column structure 2, and the two components are avoided. Knocking off the corner, slow down the drop after fine-tuning until it falls on the support keel 91 and the bracket support 10, and the elevation and levelness are reviewed in time.

[0054] Step eight, hoist the cap overlap, install the cap overlap:

[0055] Before hoisting, the quality responsible person checks the number and size of the cap overlap 41, and checks the quality. After the special person responsible for hooking, when the hooking personnel retreat to the safe area, the signal worker below confirms the safety of the components around, commands slow lifting, and when the lifting is about 500mm away from the ground, the tower crane lifting is safe, and the lifting continues. When the cap overlap 41 is hoisted to the position above the installation position area 500mm, the traction rope is pulled to fine-tune the position of the cap overlap 41, and the fine-tuning is completed. Slow down the drop until it falls on the support keel 91, and the elevation and levelness are reviewed in time.

[0056] Step nine, bind the steel bars in the column cap cast-in-place part 32 and the cap cast-in-place part 42 range, and weld the connecting plate bar 43 and the column cap connecting bar 34 one by one on both sides, and then pour the cast-in-place concrete 11 integrally.

Claims

1. A fabricated composite flat-slab structure, characterized by: The prefabricated structure comprises a foundation structure (1), a prefabricated column structure (2), a composite column cap structure (3) and a composite floor structure, and is supported on the top surface of the foundation structure (1) through a support structure, The bottom of the prefabricated column structure (2) is fixedly connected to the foundation structure (1), the composite column cap structure (3) is sleeved around the prefabricated column structure (2), and the composite floor structure comprises a cap-interim floor (4) directly connected to the prefabricated column structure (2), the cap-interim floor (4) is fixedly connected to the composite column cap structures (3) on the two sides, and the composite floor structure further comprises an inter-floor floor (5) arranged between adjacent cap-interim floors (4), and a cast-in-place joint (6) is reserved between the edges of the inter-floor floor (5) and the edges of the cap-interim floor (4). The composite column cap structure (3) comprises a column cap composite part (31) and a column cap cast-in-place part (32), the cap-interim floor (4) comprises a cap-interim composite part (41) and a cap-interim cast-in-place part (42), the column cap composite part (31) is integrally connected to the cap-interim composite part (41), the inter-floor floor (5) comprises an inter-floor composite part and an inter-floor cast-in-place part, and the concrete of the column cap cast-in-place part (32), the cap-interim cast-in-place part (42), the inter-floor cast-in-place part and the cast-in-place joint (6) is integrally poured post-poured concrete. The inner edge of the column cap composite part (31) is tightly pressed against the outer wall surface of the prefabricated column structure (2), and the post-poured concrete is fixedly connected to the surface of the prefabricated column structure (2) through key groove engagement. The support structure comprises a prefabricated column support structure, the prefabricated column support structure comprises a column bottom limiting assembly (7) and a column side support rod (8), the column bottom limiting assembly (7) is a type steel sleeve arranged around the column bottom, the bottom end of the column side support rod (8) is detachably connected to the top surface of the foundation structure (1), and the top end of the column side support rod (8) is adjustably connected to the side wall surface of the prefabricated column structure (2). The support structure further comprises a horizontal component support structure, the horizontal component support structure comprises a scaffold support (9), and the scaffold support (9) is arranged at the bottom of the column cap composite part (31) and the cap-interim composite part (41); the bottom of the column cap composite part (31) is separately provided with a row of scaffold supports (9). The horizontal component support structure further comprises a corbel support (10) connected to the side wall of the prefabricated column structure (2) and arranged at the bottom of the column cap composite part (31).

2. The prefabricated composite girderless floor structure according to claim 1, characterized in that: The thickness of the composite column cap structure (3) is greater than the thickness of the composite floor structure, the bottom elevation of the column cap composite part (31) is lower than the bottom elevation of the cap-interim composite part (41), and the composite column cap structure (3) is flush with the upper surface of the composite floor structure.

3. The prefabricated composite girderless floor structure according to claim 2, characterized in that: The outer edge top edge bead of the column cap composite part (31) is connected to the inner edge bottom edge bead of the cap-interim composite part (41).

4. The fabricated composite girderless floor structure according to claim 3, characterized in that: The column cap composite part (31) is internally embedded with a column cap embedded bar (33), the part of the column cap embedded bar (33) extending out of the column cap composite part (31) and located in the range of the column cap cast-in-place part (32) is further provided with a horizontal column cap connecting bar (34), the cap-interim composite part (41) is internally embedded with a connecting plate bar (43) arranged in full length and inserted into the column cap cast-in-place part (32), the connecting plate bar (43) and the column cap connecting bar (34) are one-to-one correspondingly arranged and double-sidedly welded and connected.

5. The prefabricated composite girderless floor structure according to claim 1, characterized in that: The steel sleeve is fixedly connected on the top surface of the foundation structure (1), and the size of the steel sleeve is adapted to the size of the bottom of the column prefabricated column structure (2), and the bottom of the prefabricated column structure (2) is seated in the steel sleeve.

6. The prefabricated composite girderless floor structure according to claim 1, characterized in that: The scaffold support (9) comprises support joists (91), vertical supports (92), horizontal supports (93) and diagonal supports (94), the support joists (91) are arranged on the top of the vertical supports (92) and are arranged on the bottom of the column cap overlap part (31) and the cap inter overlap part (41), the bottom of the vertical supports (92) stands on the top surface of the foundation structure (1), the horizontal supports (93) are connected between the vertical supports (92), and the vertical supports (92) and the horizontal supports (93) enclose a support frame, and the diagonal supports (94) are connected at the diagonal positions of the support frame.

7. The prefabricated composite girderless floor structure according to claim 1, characterized in that: The bracket support (10) is enclosed around the side wall of the prefabricated column structure (2), the bracket support (10) comprises two parallel long brackets (101) and two parallel short brackets (102), the end of the long bracket (101) extends out of the prefabricated column structure (2), the two ends of the short bracket (102) are tightly arranged on the top of the long brackets (101) on the two sides, and the long bracket (101) and the short bracket (102) are detachably connected on the surface of the side wall of the prefabricated column structure (2) through the anchor bolts (103).

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