CN112575886A - Low-level and multi-level fully-prefabricated assembled concrete structure and design, production and installation method - Google Patents
Low-level and multi-level fully-prefabricated assembled concrete structure and design, production and installation method Download PDFInfo
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- CN112575886A CN112575886A CN202110039225.8A CN202110039225A CN112575886A CN 112575886 A CN112575886 A CN 112575886A CN 202110039225 A CN202110039225 A CN 202110039225A CN 112575886 A CN112575886 A CN 112575886A
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- 239000004567 concrete Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 title claims description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000013461 design Methods 0.000 title claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 47
- 238000010276 construction Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 8
- 210000002105 tongue Anatomy 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
- E04B1/04—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of concrete, e.g. reinforced concrete, or other stone-like material
- E04B1/043—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the technical field of reinforced concrete prefabricated building structure engineering, wherein a low-rise and multi-rise fully-prefabricated concrete structure consists of a plurality of prefabricated shear wall panels, prefabricated columns, prefabricated beams and fully-prefabricated floor slabs; the prefabricated shear wall panels are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns is realized by adopting a full-dry bolt connection method; the fully-prefabricated floor slab and the prefabricated beams are connected in a lap joint mode, the prefabricated beams and the corresponding reinforcing steel bar rings in the fully-prefabricated floor slab are connected through the plurality of longitudinal connecting reinforcing steel bars, the end parts of the reinforcing steel bar rings are provided with the stirrup caps, the prefabricated beams and the prefabricated columns are connected in a dry mode through bolts, and the fully-prefabricated floor slab is connected in a splicing mode through the reinforcing steel bar rings.
Description
Technical Field
The invention relates to the technical field of reinforced concrete prefabricated building structure engineering, in particular to a low-rise and multi-storey fully-prefabricated concrete structure and a design, production and installation method thereof.
Background
The prefabricated structure is that concrete components such as beams, plates, columns, walls and the like are prefabricated in a factory, then the prefabricated structure is transported to a construction site for splicing or part of key nodes are cast in situ, and finally a building is built.
The fundamental difference between the prefabricated structure and the cast-in-place structure is that the prefabricated structure is provided with a seam, the cast-in-place structure is a whole, the existing design is that the prefabricated structure is cast in place equivalently, and the prefabricated concrete structure can be regarded as a whole. The connection modes adopted by the prefabricated concrete structure include post-cast joints, rough surfaces, sleeve grouting connection, slurry anchor lap joint and the like.
While the prefabricated concrete structure is being vigorously developed, a number of problems disadvantageous to the assembly are occurring in succession.
Firstly, the component steel bar connection of the assembled integral shear wall structure is complex, and during field installation, the steel bar bending phenomenon is serious, so that the problems that the steel bar cannot be installed and cut at will are easy to occur.
Secondly, the node connection of prefabricated concrete structure adopts cast-in-place node to guarantee the wholeness of structure and good anti-seismic performance mostly, and the construction of prefabricated building has two sets of construction methods like this, both needs the industrialization workman, also needs traditional constructor, and is still complicated than traditional cast-in-place concrete structure on the operation mode.
Thirdly, the construction cost of the fabricated concrete structure is about 20% higher than that of the traditional cast-in-place concrete structure.
Fourthly, the construction site management of the fabricated structure is not standard, and the problems that workers do not operate according to the standard and regulations and the like occur.
Fifthly, the construction method of the fabricated structure is imperfect, a plurality of technical problems exist in the prefabricated building construction process, and a plurality of fabricated residential demonstration projects in China advance in groping.
Although high-rise buildings are more in China, low-rise and multi-rise buildings still have a considerable amount of construction. The complete technology of the low-rise and multi-layer fully-prefabricated concrete structure fills the blank of the field in China, solves the problems of low assembly rate, sleeve connection quality, large use of field templates and supports and the like of the conventional prefabricated building, and exerts the advantages of rapidness, energy conservation, environmental protection and the like of the prefabricated building.
The prefabricated members have absolutely reliable quality from the characteristics of the fabricated building, and the combination of the prefabricated members into the building depends on the nodes, so the node performance is related to the overall performance of the building. In the low-layer and multi-layer fully-assembled system, vertical components such as columns, shear walls and the like are all prefabricated components, and vertical connection is realized by adopting a full-dry method bolt connection; the frame beam and the coupling beam adopt a superposed beam, the floor slab adopts a full-prefabricated floor slab, the splicing of the full-prefabricated floor slab adopts a reinforcing steel bar ring for connection, and the full-prefabricated floor slab and the superposed beam are connected by adopting a steel corbel.
Through technical attack, the applicant develops a complete set design and installation technology of a low-rise and multi-layer fully-prefabricated assembled concrete structure to solve the problems in the prior art.
Disclosure of Invention
In order to solve one of the technical problems, the invention adopts the technical scheme that: the low-rise and multi-layer fully-prefabricated assembled concrete structure is composed of a plurality of prefabricated shear wall panels, prefabricated columns, prefabricated beams and fully-prefabricated floors; the prefabricated shear wall panels are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns is realized by adopting a full-dry bolt connection method; the prefabricated floor slab is connected with the prefabricated beam in a lap joint mode, the prefabricated beam and the corresponding reinforcing steel bar rings in the prefabricated floor slab are connected through a plurality of longitudinal connecting reinforcing steel bars, the hoop reinforcement caps are arranged at the end parts of the reinforcing steel bar rings, the prefabricated beam and the prefabricated columns are connected in a dry mode through bolts, and the prefabricated floor slab is connected in a splicing mode through the reinforcing steel bar rings.
The prefabricated shear wall panels, the prefabricated columns, the prefabricated beams and the full prefabricated floor slabs are all prefabricated components.
Preferably, the precast column is a frame column structure, and the precast beam is a superposed beam structure.
Preferably, the dry-type bolted connection structure includes a vertical connecting steel bar with screw thread, vertical connecting steel bar passes the bolt hole of reserving on a sleeve pipe and the precast shear wall board and passes through bolted connection to by backing plate, nut locking upper and lower adjacent precast shear wall board, it is sealed to pour into grout in the reservation hole, the installation is accomplished the back concrete seal and is reserved the mounting hole, accomplishes the vertical connection of precast shear wall board.
Specifically, a dry bolt connection technology is adopted between adjacent prefabricated shear wall panels to ensure the firmness, stability and safety of connection between the prefabricated shear wall panels. The diameter of the vertical connecting bolt of the prefabricated shear wall panel is 20mm, and the distance between adjacent bolts is 400 mm.
Grouting from the bolt hole, and then grouting cement mortar grouting material.
The reserved mounting hole is 150mm multiplied by 200mm, and the inner injection C35 concrete is sealed.
The top and the bottom of the prefabricated shear wall panel are both provided with 200 multiplied by 250 hidden beams.
The prefabricated shear wall bolt connection technology is characterized in that a steel bar with threads penetrates through a sleeve, the upper and lower adjacent prefabricated shear walls are locked by a base plate and a nut, the vertical connection of the prefabricated shear wall panels is completed, and only the protective effect of sleeve grouting on bolts is considered. The prefabricated shear wall bolt connection technology has the advantages of reliable connection quality, convenience in operation, low cost and the like; the connection technology forms flexible nodes at the connection parts, and the buildings with the flexible nodes have better earthquake-resistant performance than the buildings with rigid nodes.
Preferably, bolt holes and mounting holes are formed in the edges of the prefabricated columns, column end anchoring bolts are arranged on the tops of the prefabricated columns on the lower layer, column end bolt connectors are arranged at the bottoms of the prefabricated columns on the upper layer, the prefabricated columns on the upper layer and the prefabricated columns on the lower layer are fixedly connected through bolts, and no-shrinkage grouting material is used for filling joints.
Specifically, all the prefabricated columns are vertically connected through bolts in an all-dry method, and the prefabricated columns are connected with adjacent prefabricated components in a bolt fastening mode. The bolt connection can be provided with a bolt hole and a mounting hand hole at the edge of the component, and the bolt hole is penetrated by a bolt to realize fastening connection. The invention discloses a bolt connector for realizing connection. And simultaneously, grouting and caulking at the joint of the prefabricated column by using the non-shrinkage grouting material.
Preferably, a reserved tongue-and-groove is arranged on the full precast floor slab at the joint of the precast beam and the full precast floor slab, and post-pouring of concrete is realized at the structural joint of the precast beam and the full precast floor slab.
Here, a stirrup cap is used instead of a stirrup.
Preferably, a beam end bolt connector is embedded at the connecting end of the precast beam, and an anchor bolt is embedded at the connecting end of the precast column; the beam end bolt connector is connected with the embedded anchor bolt during installation construction; grouting and filling the joints of the precast beams and the precast columns by using non-shrinkage grouting materials; only at the pre-buried beam-ends bolted connection ware of the lower floor of precast beam, the vertical muscle of the upper strata post-cast part of precast beam adopts reinforcing bar mechanical connection to connect the bolt of pre-buried at prefabricated column shaft.
Preferably, the adjacent full precast floor slabs are connected by inserting bars through the reinforcing steel bar rings and then pouring concrete, reserved grooves and tongues are arranged at each connecting end of the two full precast floor slabs which are in butt joint, and two sides of each reserved groove and tongue extend out of the reinforcing steel bar rings at corresponding positions; the two reserved tongues and grooves are oppositely arranged, and gaps are sealed by sealing strips; the two reinforcing steel bar rings are staggered to form a common space, four longitudinal connecting reinforcing steel bars are inserted into the common space, and a concrete post-cast strip structure is formed by pouring fine stone concrete.
The two reinforcing steel bar rings are staggered to form a common space, four longitudinal connecting reinforcing steel bars are inserted into the common space, and then fine aggregate concrete is poured to finally form a whole plate.
The bolt connection of the full dry method is realized by the bolt fastening mode and the connection between the adjacent prefabricated parts. The prefabricated shear wall boards are connected by dry bolts, so that the firmness, stability and safety of connection between the wall boards are ensured.
The design, production and installation method of the low-rise and multi-layer fully prefabricated assembled concrete structure comprises the following steps:
a. performing prefabricated shear wall panel connection, prefabricated column connection, prefabricated beam and prefabricated floor slab connection and connection design of nodes between the prefabricated floors at the connection nodes of all prefabricated components of the low-layer and multi-layer fully-prefabricated assembled concrete structure;
preferably, the connection of the nodes is designed as follows: the prefabricated shear wall panels are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns is realized by adopting a full-dry bolt connection method; the prefabricated floor slab is connected with the prefabricated beams in a lap joint mode, the prefabricated beams and the corresponding reinforcing steel bar rings in the prefabricated floor slab are connected through a plurality of longitudinal connecting reinforcing steel bars, the end parts of the reinforcing steel bar rings are provided with stirrup caps, the prefabricated beams and the prefabricated columns are connected in a dry mode through bolts, and the prefabricated floor slab is spliced through the reinforcing steel bar rings; when the design of the connecting node is carried out, the good structural performance is ensured, and the production and the installation are convenient.
b. The production of prefabricated components such as prefabricated shear wall panels, prefabricated columns, prefabricated beams, fully prefabricated floor slabs and the like is carried out on an automatic production line;
c. all prefabricated components such as prefabricated shear wall panels, prefabricated columns, prefabricated beams, fully-prefabricated floor slabs and the like are completely prefabricated in a factory and transported to a construction site, and construction and installation are carried out in a non-wet operation mode or a less-wet operation mode.
Preferably, the steps of producing the fully prefabricated part in the step b are as follows:
(1) and (3) mould treatment: cleaning the surfaces of the grouped vertical mold plates, leveling the surfaces, removing residues and foreign matters, and cleaning cement paste and concrete residues on the surfaces;
(2) the positioning installation of tongue-and-groove, keyway reservation hole, hoist and mount buried piece, connection buried piece, antislip strip is reserved to formwork erection in groups: accurately installing the reserved structure waterproof rabbet accessory on the side template surface of the mold, and installing the key groove reserved hole, the hoisting embedded part and the connecting embedded part accessory required for on-site construction installation and hoisting on the template surface;
(3) the reinforcing steel bar net rack of installation wallboard, post, roof beam and floor: binding the steel bars into a steel bar net rack in a steel bar binding area according to a design drawing, and hoisting and conveying the steel bar net rack to each production station through hoisting equipment for installation and positioning;
(4) and pouring concrete: hidden acceptance check is carried out before the concrete is poured, the concrete is poured by adopting an automatic distributing machine after the acceptance check is passed, and the concrete is continuously poured; ensuring the concrete to vibrate compactly and uniformly; when the mould, the embedded part, the reinforcing steel bar net rack and the like are deformed and displaced, reinforcement and correction measures are taken in time;
(5) curing and demolding: and (3) after concrete pouring is finished, performing static curing for a period of time, performing steam curing on various full prefabricated components, checking the strength of the concrete test block cured under the same condition before stripping and lifting, and stripping and lifting after the designed stripping and lifting strength is reached.
The invention has the beneficial effects that: the low-multilayer fully-prefabricated assembled concrete structure has the advantages that the field wet workload of a formed structural system is extremely small, the prefabrication rate is higher than 90%, the structure has good anti-seismic performance, and the method belongs to a template-free and support-free rapid production and installation method of an integral structural system.
The method is beneficial to improving the quality level of the connection and construction technology of the assembled building joint, improving the construction efficiency, reducing the labor intensity, reducing the building garbage discharge and the consumption of non-solid materials, and has remarkable comprehensive benefits.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
Fig. 1 is a schematic illustration of a three-dimensional cross-sectional internal structure of the present invention.
Fig. 2 is a schematic structural view of a prefabricated shear wall panel connection node of the present invention.
Fig. 3 is a schematic structural view of a full precast floor slab connection node according to the present invention.
Fig. 4 is a schematic structural view of a connection node of a precast beam and a full precast floor slab according to the present invention.
Fig. 5 is a schematic structural view of a connecting node of a precast beam and a precast column according to the present invention.
Fig. 6 is a schematic structural view of the prefabricated column vertical connecting node of the present invention.
In the figure, 1, a shear wall panel is prefabricated; 2. prefabricating a column; 3. prefabricating a beam; 4. fully prefabricating a floor slab; 5. a reinforcing bar ring; 6. a stirrup cap; 7. a lamination layer; 8. vertically connecting reinforcing steel bars; 9. a wall steel bar net rack; 10. hidden beams; 11. a post-end anchor bolt; 12. a post-end bolt connector; 13. no shrinkage grouting material; 14. a beam-end bolt connector; 15. an anchor bolt; 16. mechanically connecting the steel bars with the joints; 17. reserving a tongue-and-groove; 18. longitudinally connecting reinforcing steel bars; 19. post-pouring concrete strips; 20. c35 concrete; 21. floor slab reinforcing steel bar net rack.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
The invention mainly aims to solve the problems of novel node connection and the like of all prefabricated components in a low-rise and multi-rise fully-assembled system in an assembled building structure.
The invention can effectively solve the problems of the connection of all prefabricated part wallboards, the connection of frame columns, the connection of beams and floor slabs, the connection of nodes between floor slabs under the condition of no-wet operation or less-wet operation and the like in a low-level and multi-level full-assembled system, ensures the safety and stability of all the prefabricated part connection nodes, and improves the installation efficiency of a construction site.
The connecting nodes of all the prefabricated components are connected by adopting the dry bolts during construction and installation, so that the formed structural system has extremely small field wet operation amount, the prefabrication rate is higher than 90 percent, and the method has good seismic performance and belongs to a template-free and support-free rapid production and installation method of the whole structural system. The method is beneficial to improving the quality level of the connection and construction technology of the assembled building joint, improving the construction efficiency, reducing the labor intensity, reducing the building garbage discharge and the consumption of non-solid materials, and has remarkable comprehensive benefits.
As shown in fig. 1 to 6, a low-rise, multi-storey and fully prefabricated concrete structure, which is composed of a plurality of prefabricated shear wall panels 1, prefabricated columns 2, prefabricated beams 3 and fully prefabricated floor slabs 4; the prefabricated shear wall panels 1 are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns 2 is realized by adopting a full-dry bolt connection method; the prefabricated floor slab is characterized in that the prefabricated floor slabs 4 and the prefabricated beams 3 are connected in a lap joint mode, the prefabricated beams 3 and the reinforcement rings 5 corresponding to the inside of the prefabricated floor slabs 4 are connected through a plurality of longitudinal connecting reinforcements 18, stirrup caps 6 are arranged at the end parts of the prefabricated beams and the reinforcement rings 5, the prefabricated beams 3 and the prefabricated columns 2 are connected in a bolt dry mode, and the prefabricated floor slabs 4 are connected in a splicing mode through the reinforcement rings 5.
The prefabricated shear wall panel 1, the prefabricated column 2, the prefabricated beam 3 and the fully-prefabricated floor slab 4 are all prefabricated components.
Preferably, the precast column 2 is a frame column structure, the precast beam 3 is a superposed beam structure, and a superposed layer 7 is arranged on the upper layer.
Preferably, the dry-type bolted connection structure includes a vertical connecting steel bar 8 with screw thread, vertical connecting steel bar 8 passes through a bolt hole reserved on a sleeve pipe and prefabricated shear wall panel 1 and passes through bolted connection to by backing plate, nut locking prefabricated shear wall panel 1 adjacent from top to bottom, in reserve the hole grout seal, the installation is accomplished the back concrete seal and is reserved the mounting hole, accomplishes the vertical connection of prefabricated shear wall panel 1.
Specifically, a dry bolt connection technology is adopted between the adjacent prefabricated shear wall panels 1 so as to ensure the firmness, stability and safety of connection between the prefabricated shear wall panels 1. The diameter of the vertical connecting bolt of the prefabricated shear wall panel 1 is 20mm, and the distance between adjacent bolts is 400 mm.
Grouting from the bolt hole, and then grouting cement mortar grouting material.
The reserved mounting hole is 150mm multiplied by 200mm, and the inner injection C35 concrete 20 is sealed.
And a wall body reinforcing steel bar net rack 9 is poured inside the prefabricated shear wall panel 1.
And a floor slab reinforcing steel bar net rack 21 is poured inside the full precast floor slab 4.
200 multiplied by 250 hidden beams 10 are arranged at the top and the bottom of the prefabricated shear wall panel 1.
The prefabricated shear wall bolt connection technology is characterized in that a steel bar with threads penetrates through a sleeve, the upper and lower adjacent prefabricated shear walls are locked by a base plate and a nut, the vertical connection of the prefabricated shear wall wallboard 1 is completed, and only the protective effect of sleeve grouting on bolts is considered. The prefabricated shear wall bolt connection technology has the advantages of reliable connection quality, convenience in operation, low cost and the like; the connection technology forms flexible nodes at the connection parts, and the buildings with the flexible nodes have better earthquake-resistant performance than the buildings with rigid nodes.
Preferably, bolt holes and mounting holes are arranged at the edges of the prefabricated columns 2, column end anchoring bolts 1511 are arranged at the tops of the prefabricated columns 2 on the lower layer, column end bolt connectors 12 are arranged at the bottoms of the prefabricated columns 2 on the upper layer, the prefabricated columns 2 on the upper layer and the prefabricated columns 2 on the lower layer are fixedly connected through bolts, and no-shrinkage grouting material 13 is used for filling gaps.
Specifically, the vertical connection of each prefabricated column 2 adopts the full-dry method of bolt connection, and the connection with the adjacent prefabricated components is realized in a bolt fastening mode. The bolt connection can be provided with a bolt hole and a mounting hand hole at the edge of the component, and the bolt hole is penetrated by a bolt to realize fastening connection. The invention discloses a bolt connector for realizing connection. And simultaneously, grouting and caulking at the joint of the prefabricated column 2 by using the non-shrinkage grouting material 13.
Preferably, a reserved tongue-and-groove 17 is arranged on the full precast floor slab 4 at the joint of the precast beam 3 and the full precast floor slab 4, and concrete post-pouring is realized at the structural joint of the precast beam 3 and the full precast floor slab 4.
Here, the stirrup cap 6 is used instead of the stirrup.
Preferably, beam end bolt connectors 14 are pre-embedded at the connecting ends of the precast beams 3, and anchor bolts 15 are pre-embedded at the connecting ends of the precast columns 2; during installation and construction, the beam end bolt connector 14 is connected with the embedded anchor bolt 15; grouting and filling the joint of the precast beam 3 and the precast column 2 by using non-shrinkage grouting material 13; only at the lower floor embedded beam end bolt connector 14 of precast beam 3, the vertical muscle of the upper strata post-cast part of precast beam 3 adopts reinforcing bar mechanical connector 16 to connect the bolt of pre-buried at precast column 2 shaft.
Preferably, the adjacent full precast floor slabs 4 are connected by inserting bars through the reinforcing steel bar rings 5 and then pouring concrete, the reserved tongue-and-groove 17 is arranged at each connecting end of the two full precast floor slabs 4 which are butted, and two sides of each reserved tongue-and-groove 17 extend out of the reinforcing steel bar ring 5 at the corresponding position; the two reserved tongues 17 are oppositely arranged and the gap is sealed by a sealing strip; the two reinforcing steel bar rings 5 are staggered to form a common space, four longitudinal connecting reinforcing steel bars 18 are inserted into the common space, and fine stone concrete is poured to form a concrete post-pouring belt 19 structure.
The two reinforcing steel bar rings 5 are staggered to form a common space, four longitudinal connecting reinforcing steel bars 18 are inserted into the common space, and then fine aggregate concrete is poured to finally form a whole plate.
The bolt connection of the full dry method is realized by the bolt fastening mode and the connection between the adjacent prefabricated parts. The prefabricated shear wall panels 1 are connected by dry bolts, so that the firmness, stability and safety of connection between the wall panels are ensured.
The design, production and installation method of the low-rise and multi-layer fully prefabricated assembled concrete structure comprises the following steps:
a. performing prefabricated shear wall panel 1 connection, prefabricated column 2 connection, prefabricated beam 3 and full prefabricated floor slab 4 connection and connection design of nodes between full prefabricated floor slabs 4 at the connection nodes of all prefabricated components of the low-rise and multi-rise fully prefabricated assembled concrete structure as claimed in claims 1 to 6;
preferably, the connection of the nodes is designed as follows: the prefabricated shear wall panels 1 are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns 2 is realized by adopting a full-dry bolt connection method; the fully-prefabricated floor slab 4 is connected with the prefabricated beam 3 in a lap joint mode, the prefabricated beam 3 and the corresponding reinforcing steel bar ring 5 inside the fully-prefabricated floor slab 4 are connected through a plurality of longitudinal connecting reinforcing steel bars 18, a stirrup cap 6 is arranged at the end part of the prefabricated beam 3 and the prefabricated column 2, the prefabricated beam 3 and the prefabricated column 2 are in dry connection through bolts, and the fully-prefabricated floor slab 4 is spliced through the reinforcing steel bar ring 5; when the design of the connecting node is carried out, the good structural performance is ensured, and the production and the installation are convenient.
b. The production of the prefabricated shear wall panel 1, the prefabricated column 2, the prefabricated beam 3, the fully prefabricated floor slab 4 and other fully prefabricated components is carried out on an automatic production line;
c. all prefabricated components such as the prefabricated shear wall panels 1, the prefabricated columns 2, the prefabricated beams 3, the fully-prefabricated floor slabs 4 and the like are completely prefabricated in a factory and transported to a construction site, and construction and installation are carried out in a non-wet operation mode or a less-wet operation mode.
Preferably, the steps of producing the fully prefabricated part in the step b are as follows:
(1) and (3) mould treatment: cleaning the surfaces of the grouped vertical mold plates, leveling the surfaces, removing residues and foreign matters, and cleaning cement paste and concrete residues on the surfaces;
(2) the positioning installation of the tongue-and-groove 17, the key groove reserved hole, the hoisting embedded part, the connecting embedded part and the anti-slip strip is reserved in the group of vertical molds: accurately installing the reserved structure waterproof rabbet accessory on the side template surface of the mold, and installing the key groove reserved hole, the hoisting embedded part and the connecting embedded part accessory required for on-site construction installation and hoisting on the template surface;
(3) the reinforcing steel bar net rack of installation wallboard, post, roof beam and floor: binding the steel bars into a steel bar net rack in a steel bar binding area according to a design drawing, and hoisting and conveying the steel bar net rack to each production station through hoisting equipment for installation and positioning;
(4) and pouring concrete: hidden acceptance check is carried out before the concrete is poured, the concrete is poured by adopting an automatic distributing machine after the acceptance check is passed, and the concrete is continuously poured; ensuring the concrete to vibrate compactly and uniformly; when the mould, the embedded part, the reinforcing steel bar net rack and the like are deformed and displaced, reinforcement and correction measures are taken in time;
(5) curing and demolding: and (3) after concrete pouring is finished, performing static curing for a period of time, performing steam curing on various full prefabricated components, checking the strength of the concrete test block cured under the same condition before stripping and lifting, and stripping and lifting after the designed stripping and lifting strength is reached.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the claims and the specification of the present invention; it will be apparent to those skilled in the art that any alternative modifications or variations to the embodiments of the present invention may be made within the scope of the present invention.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (8)
1. Low, the full prefabricated assembled concrete structure of multilayer, its characterized in that: the low-rise and multi-layer fully-prefabricated assembled concrete structure consists of a plurality of prefabricated shear wall panels, prefabricated columns, prefabricated beams and fully-prefabricated floor slabs; the prefabricated shear wall panels are connected by adopting a dry bolt connecting structure, and the vertical connection of the prefabricated columns is realized by adopting a full-dry bolt connection method; the prefabricated floor slab is connected with the prefabricated beam in a lap joint mode, the prefabricated beam and the corresponding reinforcing steel bar rings in the prefabricated floor slab are connected through a plurality of longitudinal connecting reinforcing steel bars, the hoop reinforcement caps are arranged at the end parts of the reinforcing steel bar rings, the prefabricated beam and the prefabricated columns are connected in a dry mode through bolts, and the prefabricated floor slab is connected in a splicing mode through the reinforcing steel bar rings.
2. A low, multi-layer fully precast fabricated concrete structure according to claim 1, characterized in that: the prefabricated column is of a frame column structure, and the prefabricated beam is of a superposed beam structure.
3. A low, multi-layer fully prefabricated concrete structure according to claim 2, characterized in that: the edge of the prefabricated column is provided with a bolt hole and a mounting hole, the top of the lower prefabricated column is provided with a column end anchoring bolt, the bottom of the upper prefabricated column is provided with a column end bolt connector, the upper prefabricated column and the lower prefabricated column are fixedly connected through bolts, and no-shrinkage grouting material is used for filling joints.
4. A low, multi-layer fully precast fabricated concrete structure according to claim 3, characterized in that: and arranging a reserved tongue-and-groove on the full precast floor slab at the joint of the precast beam and the full precast floor slab, and realizing post-pouring of concrete at the structural joint of the precast beam and the full precast floor slab.
5. The low, multi-layer fully precast fabricated concrete structure of claim 4, wherein: pre-burying a beam end bolt connector at the connecting end of the precast beam, and pre-burying an anchor bolt at the connecting end of the precast column; the beam end bolt connector is connected with the embedded anchor bolt during installation construction; grouting and filling the joints of the precast beams and the precast columns by using non-shrinkage grouting materials; only at the pre-buried beam-ends bolted connection ware of the lower floor of precast beam, the vertical muscle of the upper strata post-cast part of precast beam adopts reinforcing bar mechanical connection to connect the bolt of pre-buried at prefabricated column shaft.
6. The low, multi-layer fully precast fabricated concrete structure of claim 5, wherein: the adjacent full-prefabricated floor slabs are connected by inserting bars through the reinforcing steel bar rings and then pouring concrete, reserved grooves and tongues are arranged at each connecting end of the two full-prefabricated floor slabs which are in butt joint, and the two sides of each reserved groove and tongue extend out of the reinforcing steel bar rings at the corresponding positions; the two reserved tongues and grooves are oppositely arranged, and gaps are sealed by sealing strips; the two reinforcing steel bar rings are staggered to form a common space, four longitudinal connecting reinforcing steel bars are inserted into the common space, and a concrete post-cast strip structure is formed by pouring fine stone concrete.
7. The design, production and installation method of the low-rise and multi-layer fully-prefabricated assembled concrete structure is characterized in that: the method comprises the following steps:
a. performing prefabricated shear wall panel connection, prefabricated column connection, prefabricated beam and prefabricated floor slab connection and connection design of nodes between the prefabricated floor slabs at the connection nodes of all prefabricated components of the low-rise and multi-rise fully prefabricated assembly type concrete structure according to the claims 1 to 6;
b. the production of prefabricated components such as prefabricated shear wall panels, prefabricated columns, prefabricated beams, fully prefabricated floor slabs and the like is carried out on an automatic production line;
c. all prefabricated components such as prefabricated shear wall panels, prefabricated columns, prefabricated beams, fully-prefabricated floor slabs and the like are completely prefabricated in a factory and transported to a construction site, and construction and installation are carried out in a non-wet operation mode or a less-wet operation mode.
8. The low-rise and multi-rise fully prefabricated concrete structure and the design, production and installation method according to claim 7, wherein the structure comprises: the production steps of the full prefabricated part in the step b are as follows:
(1) and (3) mould treatment: cleaning the surfaces of the grouped vertical mold plates, leveling the surfaces, removing residues and foreign matters, and cleaning cement paste and concrete residues on the surfaces;
(2) the positioning installation of tongue-and-groove, keyway reservation hole, hoist and mount buried piece, connection buried piece, antislip strip is reserved to formwork erection in groups: accurately installing the reserved structure waterproof rabbet accessory on the side template surface of the mold, and installing the key groove reserved hole, the hoisting embedded part and the connecting embedded part accessory required for on-site construction installation and hoisting on the template surface;
(3) the reinforcing steel bar net rack of installation wallboard, post, roof beam and floor: binding the steel bars into a steel bar net rack in a steel bar binding area according to a design drawing, and hoisting and conveying the steel bar net rack to each production station through hoisting equipment for installation and positioning;
(4) and pouring concrete: hidden acceptance check is carried out before the concrete is poured, the concrete is poured by adopting an automatic distributing machine after the acceptance check is passed, and the concrete is continuously poured; ensuring the concrete to vibrate compactly and uniformly; when the mould, the embedded part, the reinforcing steel bar net rack and the like are deformed and displaced, reinforcement and correction measures are taken in time;
(5) curing and demolding: and (3) after concrete pouring is finished, performing static curing for a period of time, performing steam curing on various full prefabricated components, checking the strength of the concrete test block cured under the same condition before stripping and lifting, and stripping and lifting after the designed stripping and lifting strength is reached.
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