CN110670721A - Implementation method of large-span prestressed concrete assembly type building frame structure - Google Patents
Implementation method of large-span prestressed concrete assembly type building frame structure Download PDFInfo
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- CN110670721A CN110670721A CN201910976093.4A CN201910976093A CN110670721A CN 110670721 A CN110670721 A CN 110670721A CN 201910976093 A CN201910976093 A CN 201910976093A CN 110670721 A CN110670721 A CN 110670721A
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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
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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
- E04B1/18—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
- E04B1/22—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 with parts being prestressed
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention relates to the field of assembly type building construction, in particular to an implementation method of a large-span prestressed concrete assembly type building frame structure, which comprises the following steps: mounting a prefabricated column, and mounting a prefabricated connecting node at the top of the prefabricated column; placing a prefabricated beam between two adjacent prefabricated columns, pouring connecting joints at two sides of the prefabricated beam, and connecting the prefabricated beam and the prefabricated columns into a whole through prestress; stretching the prestressed steel bundles of the cross beam, and stretching the prestressed of the multi-span prefabricated cross beam into a whole; placing prefabricated longitudinal beams between two prefabricated cross beams or two prefabricated connecting nodes which are parallel to each other, pouring connecting joints between two sides of the prefabricated longitudinal beams and the prefabricated connecting nodes or the prefabricated cross beams, and connecting the prefabricated longitudinal beams in the same row with the prefabricated cross beams or the prefabricated connecting nodes into a whole through prestress; and tensioning the prestressed steel bundles of the longitudinal beam. The invention solves the problems of complicated member connection steps, unreasonable field hoisting, inaccurate connection between members and low operation efficiency in the prior art.
Description
Technical Field
The invention relates to the field of assembly type building construction, in particular to an implementation method of a large-span prestressed concrete assembly type building frame structure.
Background
At present, most buildings in China still mainly adopt cast-in-place. The construction mode causes intensive labor force of site constructors, and simultaneously, the problems of long time for pouring and maintaining concrete, construction safety and quality, construction period and the like which are caused by using a large amount of templates and supports are troubled by all parties involved for a long time. With the continuous increase of sustainable development and environmental protection and energy conservation requirements and the improvement of labor cost, the industrialization of buildings represented by fabricated buildings is more and more emphasized, and the prefabricated building has wide application prospects.
The prefabricated building has the advantages of energy conservation, environmental protection, labor cost reduction, construction progress acceleration, construction period shortening, building quality improvement and the like, but in the construction of the prefabricated building, field operators cannot understand the construction process well, and due to the fact that the number of prefabricated parts is large, unreasonable arrangement and lifting sequence of the prefabricated parts on the spot exist, field management is disordered, and the development of the prefabricated building is hindered to a certain extent.
Disclosure of Invention
The invention aims to provide an implementation method of a large-span prestressed concrete assembly type building frame structure, and aims to solve the technical problems of complicated member connection steps, unreasonable field hoisting, inaccurate member connection and low operation efficiency in the prior art.
The implementation method of the large-span prestressed concrete assembly type building frame structure comprises the following steps:
s1, mounting a prefabricated column, and mounting a prefabricated connecting node at the top of the prefabricated column;
s2, placing a prefabricated beam between two adjacent prefabricated columns, pouring connecting joints at two sides of the prefabricated beam, and maintaining until the concrete meets the requirement of tensile strength;
s3, stretching the beam prestress steel bundles in the prefabricated beam, and stretching and prestressing the multi-span prefabricated beam into a whole;
s4, placing prefabricated longitudinal beams between two parallel prefabricated cross beams or two parallel prefabricated connecting nodes, pouring connecting seams between two sides of the prefabricated longitudinal beams and the prefabricated connecting nodes or the prefabricated cross beams, and connecting the prefabricated longitudinal beams in the same row with the prefabricated cross beams or the prefabricated connecting nodes into a whole through prestress;
and S5, tensioning the prestressed steel bundles of the longitudinal beam in the prefabricated longitudinal beam.
In a preferred embodiment, the construction method of the prefabricated longitudinal beam in the step S4 is as follows:
arranging brackets on the prefabricated connecting nodes, taking the brackets of the prefabricated connecting nodes as beam falling supporting points of the prefabricated longitudinal beam, installing joint reinforcing steel bars at connecting joints between two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes, and pouring connecting joints between two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes to connect the prefabricated longitudinal beam and the prefabricated connecting nodes into a whole; or
The method comprises the steps of arranging brackets on two sides of a prefabricated beam, enabling the brackets of the prefabricated beam to serve as beam falling supporting points of a prefabricated longitudinal beam, accurately adjusting the posture of a component on the brackets of the prefabricated beam, then installing joint reinforcing steel bars at the joint between two sides of the prefabricated longitudinal beam and the prefabricated beam, and pouring joints between two sides of the prefabricated longitudinal beam and the prefabricated beam.
In a preferred embodiment, after the connecting joints of the plurality of prefabricated longitudinal beams and the prefabricated transverse beams or the prefabricated connecting nodes reach the strength in step S5, the longitudinal beam prestressed steel bundles are tensioned to connect the prefabricated longitudinal beams and the prefabricated transverse beams into a whole.
The joint reinforcing steel bar is partially arranged in the prefabricated beam, the bracket of the prefabricated beam, the prefabricated connecting node or the bracket of the prefabricated connecting node, and partially arranged in the prefabricated longitudinal beam.
According to the invention, a user transports the prefabricated columns, the prefabricated connecting nodes, the prestressed prefabricated longitudinal beams and the prestressed prefabricated cross beams to a construction site, firstly installs the prefabricated columns through erection equipment, and then installs and fixes the prefabricated connecting nodes. The prestressed prefabricated beam is hoisted and positioned through erecting equipment, the posture of a component is accurately adjusted to form a simply supported state, then joint reinforcing steel bars at the joint of two ends of the prestressed prefabricated beam and the prefabricated connecting nodes are installed, connecting joints at two ends are poured, and beam prestressed steel bundles are tensioned after the connecting joints of the plurality of prestressed prefabricated beams and the prefabricated connecting nodes reach strength, so that the prestressed prefabricated beams and the prefabricated columns are connected into a whole. The prestressed prefabricated longitudinal beams are hoisted on the cross beam bracket or the prefabricated connecting node bracket through erecting equipment, the postures of components are accurately adjusted, then seam reinforcing steel bars at the connecting positions of the prefabricated longitudinal beams and the prefabricated cross beams or the prefabricated connecting nodes are installed, connecting joints at two ends are poured, and the longitudinal beam prestressed steel bundles are stretched after the connecting joints of the plurality of prestressed prefabricated longitudinal beams and the cross beams or the prefabricated connecting nodes reach the strength, so that the prefabricated longitudinal beams, the prefabricated cross beams and the prefabricated connecting nodes are connected into a whole. And finally, pouring concrete on the cross beam, the longitudinal beam and the prefabricated connecting node to achieve an integrated layer.
Compared with the prior art, the invention has the beneficial effects that: according to the construction method, the components are prefabricated in a factory and assembled on site, so that the on-site formwork supporting quantity is reduced, the construction operation is controllable, the prefabricated assembly rate is improved, and the national development strategy is met. Because the prefabricated longitudinal beam and the prefabricated transverse beam are prefabricated in a factory and are installed and connected on site by adopting prestress, and the prefabricated components are hoisted and accurately positioned, the prefabricated longitudinal beam and the prefabricated transverse beam are high in manufacturing efficiency and precision, good in integrity, safe and reliable, and provide an instructive method for the design and construction of the fabricated building.
Drawings
FIG. 1 is a schematic view of a prefabricated column and prefabricated connecting node according to an embodiment of the present invention;
FIG. 2 is a schematic view of erecting a precast beam according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of prestressed steel bundles in a tensioned precast beam according to an embodiment of the present invention;
FIG. 4 is a schematic view of erecting a precast stringer according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a prestressed steel strand in a tensioned precast longitudinal beam according to an embodiment of the invention;
FIG. 6 is a schematic illustration of cast construction concrete according to an embodiment of the invention;
FIG. 7 is a schematic view of a multilayer structure according to an embodiment of the present invention;
FIG. 8 is a schematic side view of a prefabricated longitudinal and transverse beam construction integrated installation hanger according to an embodiment of the invention;
FIG. 9 is a schematic diagram of pre-embedded bolt holes of prefabricated longitudinal and transverse beams according to an embodiment of the invention;
wherein: 1-prefabricating a column; 2-prefabricating a connecting node; 3, prefabricating a cross beam; 4-beam corbel; 5, prefabricating a longitudinal beam; 6-prestress tensioning notch; 7-connecting seams; 8-prestressed steel strands; 9-monolithic layer concrete; 10-prefabricating a connecting node bracket; 11-comprehensive mounting of the hanger; 12-a high-strength bolt; 13-temporary jack; 14-embedded components on the upright post; 15-comprehensively installing hanger supporting legs; 16-embedding bolt holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention and are not to be taken as a full range of embodiments. All other ways, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
Examples
In the description of the present invention, it should be noted that unless otherwise explicitly specified and limited, the term "mounting" is to be understood as the final effect, i.e. the mounting of the beam is completed, i.e. the placing of the beam, the tensioning of the prestressing and other processes are completed.
The construction method of the assembled building structure based on the multiple prefabricated components, which is provided by the invention, is used for constructing a plurality of prefabricated longitudinal beams, a plurality of prefabricated transverse beams, longitudinal beam prestressed steel bundles, transverse beam prestressed steel bundles, a plurality of prefabricated common reinforced concrete columns (prefabricated columns for short), a plurality of prefabricated connecting nodes, connecting joints and the like, can be applied to single-layer or multi-layer aboveground or underground buildings, and specifically comprises the following steps:
step one, mounting the prefabricated columns and prefabricating the connecting nodes.
The prefabricated column is prefabricated at a factory by concrete, and as shown in fig. 1, the prefabricated column (i.e., a column) 1 which has been transported to the site is hoisted to a design position and fixed. The prefabricated connecting node is formed by prefabricating concrete in a factory, and after the prefabricated column 1 is installed, the prefabricated connecting node 2 is installed at the top of the prefabricated column.
And step two, placing a prefabricated beam between two adjacent prefabricated columns, and pouring connecting seams at two sides of the prefabricated beam.
The precast cross beam is formed by prefabricating concrete in a factory, a prestressed pipeline is arranged in the precast cross beam, and the cross beam prestressed steel bundle is arranged in the prestressed pipeline.
As shown in fig. 2 and 8, the prestressed prefabricated beam 3 which is transported to the site is hoisted and positioned by the comprehensive installation hanger 11, then the posture of the component is accurately adjusted to form a simply supported state, and the center of the prestressed prefabricated beam 3 is aligned with the center of the prefabricated connecting node 2 when the posture is accurately adjusted, so that the prestressed tensioning notch 6 is prevented from being not corresponding. After the prefabricated beam is placed, joint reinforcing steel bars are installed at the joint seams on the two sides of the prefabricated beam, and then the joint seams 7 on the two sides of the prefabricated beam are poured.
And step three, stretching the beam prestress steel bundles in the prefabricated beam, and stretching and prestressing the multi-span prefabricated beam into a whole.
As shown in fig. 3, after the connecting joints at both sides of the precast beam reach the strength, the beam prestressed steel bundles are tensioned to form a continuous state. Fig. 3 shows only the structure pattern of the two-span beam after being tensioned, and in actual engineering, a plurality of multi-span beams can be simultaneously tensioned and prestressed to be connected into a whole, as shown in fig. 5. The principle is similar to that of a bridge engineering construction method in which a prefabricated beam is placed firstly after simply supporting and then continuously, the step can be regarded as a simply supporting system, and then a multi-span prefabricated beam is tensioned and prestressed steel beams are integrated, so that the system is converted into a continuous system.
And step four, placing the prefabricated longitudinal beam between two parallel prefabricated cross beams or two parallel prefabricated connecting nodes, and pouring connecting seams at two sides of the prefabricated longitudinal beam.
That is, the construction method of the prestressed precast longitudinal beam is divided into two types: one method is that brackets are arranged on prefabricated connecting nodes, the brackets of the prefabricated connecting nodes are used as beam falling supporting points of prefabricated longitudinal beams, the postures of components are accurately adjusted on the brackets of the prefabricated connecting nodes, seam reinforcing steel bars at the connecting seams between the two sides of the prefabricated longitudinal beams and the prefabricated connecting nodes are installed, and then the connecting seams between the two sides of the prefabricated longitudinal beams and the prefabricated connecting nodes are poured to connect the prestressed prefabricated longitudinal beams and the prestressed prefabricated connecting nodes into a whole; the other type is that brackets are arranged on two sides of a prefabricated cross beam, the brackets on the two sides of the prefabricated cross beam are used as beam falling supporting points of the prestressed longitudinal beam, the posture of a component is accurately adjusted on the brackets of the cross beam, then joint reinforcing steel bars at the joint between the two sides of the prefabricated longitudinal beam and the prefabricated cross beam are installed, and a joint between the two sides of the prefabricated longitudinal beam and the prefabricated cross beam is poured, so that the prestressed prefabricated longitudinal beam and the prestressed prefabricated cross beam are connected into a whole.
After the prefabricated cross beam 3 is installed in the third step, the prefabricated longitudinal beam is placed on the cross beam bracket or the prefabricated connecting node bracket through erecting equipment, and then the posture of the longitudinal beam is accurately adjusted, so that the prestressed pipeline is prevented from being not corresponding. After the prefabricated longitudinal beam is placed, joint reinforcing steel bars are installed at the joint seams on the two sides of the prefabricated longitudinal beam, and then the joint seams 7 on the two sides of the prefabricated longitudinal beam are poured.
The joint reinforcing steel bars at the joint seams at the two sides of the prefabricated longitudinal beam are partially arranged in the prefabricated cross beam, the bracket of the prefabricated cross beam, the prefabricated connecting joint or the bracket 10 of the prefabricated connecting joint, and partially arranged in the prefabricated longitudinal beam. For the situation that the prefabricated longitudinal beam is connected with the prefabricated transverse beam, the joint reinforcing steel bars comprise a plurality of U-shaped reinforcing steel bars which are pre-embedded at the connection part of the prefabricated transverse beam and the prefabricated longitudinal beam, one part of the U-shaped reinforcing steel bars are pre-embedded in the prefabricated transverse beam or the bracket of the prefabricated transverse beam, one part of the U-shaped reinforcing steel bars are pre-embedded at the end part of the prefabricated longitudinal beam, and the U-shaped reinforcing steel bars which are pre-embedded in the prefabricated transverse beam or the bracket of the prefabricated transverse beam are connected with the U-shaped reinforcing steel bars which are; for the situation that the prefabricated longitudinal beam is connected with the prefabricated connecting node, the structure of the joint reinforcing steel bar is the same as that of the situation that the prefabricated longitudinal beam is connected with the prefabricated transverse beam, and the joint reinforcing steel bar arranged at the prefabricated transverse beam or the prefabricated transverse beam bracket is correspondingly changed to be arranged at the prefabricated connecting node or the prefabricated connecting node bracket, so that the description is omitted.
And fifthly, tensioning the longitudinal beam prestress steel bundles in the prefabricated longitudinal beam.
The precast longitudinal beams are formed by prefabricating concrete in a factory, the longitudinal beam prestressed steel bundles are fixed in the prestressed pipelines of the precast longitudinal beams, and after the plurality of precast longitudinal beams are hoisted, the prestressed steel bundles are tensioned and connected with the precast transverse beams into a whole. Connecting seams are reserved between the prefabricated cross beam and the prefabricated longitudinal beam and between the prefabricated cross beam and the prefabricated connecting nodes; and after the prefabricated beam is hoisted, the joint reinforcing steel bars are installed before the beam prestressed steel bundles are tensioned, corresponding connecting joints are poured, and after the prefabricated longitudinal beam is hoisted, the corresponding connecting joints are poured before the longitudinal beam prestressed steel bundles are tensioned. And maintaining the concrete of the connecting joint to reach the tensile strength.
As shown in fig. 5, after the connecting joints 7 on both sides of the prestressed precast longitudinal beam reach the strength, the longitudinal beam prestressed steel bundles 8 which are already arranged in the prestressed tensioning notches 6 are tensioned. Fig. 5 shows the structure style of the two-span precast longitudinal beams after being tensioned, and in practical engineering, a plurality of spans of one column of precast longitudinal beams can be simultaneously tensioned to prestress steel bundles to be connected into a whole. The principle of the construction conversion system is equal to the installation of the prefabricated beam, and the description is omitted here.
The beam prestressed steel bundles and the longitudinal beam prestressed steel bundles are separately arranged in staggered layers, and tensioning is carried out after the connecting joints are poured. The thickness of the connecting joint is about 350mm, and concrete is poured after the joint reinforcing steel bars are installed. The lap joint thickness of the prefabricated longitudinal beam and the brackets at two sides of the prefabricated transverse beam is at least 200 mm.
And step six, pouring concrete on the prefabricated cross beams, the prefabricated longitudinal beams and the prefabricated connecting nodes to form the building structure integrated layer connected by the multiple prefabricated components.
As shown in fig. 6, after the plurality of prestressed precast cross beams 3 and the plurality of prestressed precast longitudinal beams 5 are installed, an integrated layer concrete 9 is poured to achieve the effect of an integrated layer.
Step seven, constructing a multi-layer assembly type building structure
As shown in fig. 7, the construction method can be applied to single or multi-story above-ground or underground buildings. And repeating the first step to the sixth step, and constructing a two-layer structure or more-layer structures on the basis of the one-layer structure so as to complete the construction of the multi-layer assembly type building structure.
In addition, the erection equipment adopted by the construction method mainly comprises the comprehensive installation hanger 12 and the plurality of temporary jacks 13, a floor support does not need to be erected, a large amount of support materials and erection time are saved, and the construction efficiency is high. As shown in fig. 8 and 9, the high-strength bolts 12 are arranged on the legs 15 of the comprehensive installation hanger, and the comprehensive installation hanger is connected with the pre-embedded bolt holes 16 arranged on the prefabricated cross beam through the high-strength bolts so as to be fixed on the prefabricated cross beam, thereby ensuring that the comprehensive installation hanger and the prestressed prefabricated cross beam are relatively fixed, and having a better supporting function. The temporary jack 13 is fixedly installed on the prefabricated connecting node 2 through the embedded member 14 on the upright column, so that the relative fixation of the temporary jack and the prefabricated connecting node is ensured, and the temporary jack has a better supporting and adjusting effect. And finally, connecting the comprehensive installation hanging bracket with a temporary jack, and adjusting the horizontal and longitudinal positions of the prefabricated beam according to the requirements.
As shown in fig. 9, the pre-buried bolt holes 16 on the precast cross beam can be pre-buried in the top and both sides of the precast cross beam respectively, and the pre-buried bolt holes need to be precast simultaneously with the precast cross beam in a factory.
The high-strength bolts arranged on the supporting legs of the comprehensive installation hanging bracket and the number of the pre-buried bolt holes in the prefabricated cross beam are arranged according to the weight and the hoisting condition of the prestressed prefabricated cross beam.
The present invention is not limited to the above embodiments, and those skilled in the art can obtain other products in various forms without departing from the spirit of the present invention, and any changes in the shape or structure thereof, which are similar or similar to the technical solutions of the present invention, are within the protection scope of the present invention.
Claims (10)
1. The implementation method of the large-span prestressed concrete assembly type building frame structure is characterized by comprising the following steps of:
s1, mounting a prefabricated column, and mounting a prefabricated connecting node at the top of the prefabricated column;
s2, placing a prefabricated beam between two adjacent prefabricated columns, pouring connecting joints on two sides of the prefabricated beam, and connecting the prefabricated beam and the prefabricated columns into a whole through prestress;
s3, stretching the beam prestress steel bundles in the prefabricated beam, and stretching and prestressing the multi-span prefabricated beam into a whole;
s4, placing prefabricated longitudinal beams between two parallel prefabricated cross beams or two parallel prefabricated connecting nodes, pouring connecting seams between two sides of the prefabricated longitudinal beams and the prefabricated connecting nodes or the prefabricated cross beams, and connecting the prefabricated longitudinal beams in the same row with the prefabricated cross beams or the prefabricated connecting nodes into a whole through prestress;
and S5, tensioning the prestressed steel bundles of the longitudinal beam in the prefabricated longitudinal beam.
2. The implementation method of claim 1, wherein in the step S4, the prefabricated longitudinal beam is constructed in a manner that:
arranging brackets on the prefabricated connecting nodes, taking the brackets of the prefabricated connecting nodes as beam falling supporting points of the prefabricated longitudinal beam, installing joint reinforcing steel bars at connecting joints between two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes, and pouring connecting joints between two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes to connect the prefabricated longitudinal beam and the prefabricated connecting nodes into a whole; or
The method comprises the steps of arranging brackets on two sides of a prefabricated beam, enabling the brackets of the prefabricated beam to serve as beam falling supporting points of a prefabricated longitudinal beam, accurately adjusting the posture of a component on the brackets of the prefabricated beam, then installing joint reinforcing steel bars at the joint between two sides of the prefabricated longitudinal beam and the prefabricated beam, and pouring joints between two sides of the prefabricated longitudinal beam and the prefabricated beam.
3. The method according to claim 1 or 2, wherein in step S5, after the joints between the prefabricated longitudinal beams and the prefabricated transverse beams or the prefabricated connecting joints have reached the strength, the prestressed steel bundles of the longitudinal beams are tensioned to connect the prefabricated longitudinal beams and the prefabricated transverse beams into a whole.
4. The method of claim 2, wherein the joint bars are partially disposed in the precast transverse beams, the brackets of the precast transverse beams, the precast connecting nodes or the brackets of the precast connecting nodes, and partially disposed in the precast longitudinal beams.
5. The implementation method of claim 4, wherein the joint reinforcing steel bars at the joints between the two sides of the prefabricated longitudinal beam and the prefabricated transverse beam comprise a plurality of U-shaped reinforcing steel bars pre-embedded at the joints between the prefabricated transverse beam and the prefabricated longitudinal beam, a part of the U-shaped reinforcing steel bars are pre-embedded in the prefabricated transverse beam or the bracket of the prefabricated transverse beam, a part of the U-shaped reinforcing steel bars are pre-embedded at the end part of the prefabricated longitudinal beam, and the U-shaped reinforcing steel bars pre-embedded in the bracket of the prefabricated transverse beam or the prefabricated transverse beam are connected with the U-shaped reinforcing steel bars pre-embedded at the end part of the prefabricated longitudinal.
6. The implementation method of claim 5, wherein the joint reinforcing bars at the joint between the two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes further comprise longitudinal beam embedded straight bars arranged at the two ends of the prefabricated longitudinal beam, cross beam embedded straight bars arranged in the prefabricated cross beam and overlapped layer reinforcing bars, the longitudinal beam embedded straight bars and the cross beam embedded straight bars are connected through reinforcing bar connectors, the overlapped layer reinforcing bars are connected with the longitudinal beam embedded straight bars through the reinforcing bar connectors, the longitudinal beam embedded straight bars connected with the overlapped layer reinforcing bars are located on the upper portion of the prefabricated longitudinal beam and extend out of the end portion of the prefabricated longitudinal beam, and the overlapped layer reinforcing bars penetrate through a post-cast overlapped layer covering the joint.
7. The implementation method of claim 5, wherein the joint reinforcing steel bars at the connecting joints between the two sides of the prefabricated longitudinal beam and the prefabricated connecting nodes further comprise pre-embedded L-shaped reinforcing steel bars arranged at the two ends of the prefabricated longitudinal beam, the pre-embedded L-shaped reinforcing steel bars penetrate through the post-cast overlapping layer covering the connecting joints, and the end parts of the pre-embedded L-shaped reinforcing steel bars penetrate into the connecting joints.
8. The method of claim 2, wherein the prefabricated longitudinal beams are placed on the prefabricated beam brackets or the prefabricated connecting node brackets through erecting equipment in the step S4.
9. The method of claim 1, wherein the construction method further performs the following steps after step S5:
s6, pouring construction concrete on the prefabricated cross beams, the prefabricated longitudinal beams and the prefabricated connecting nodes to integrally layer the building structure connected by the multiple prefabricated components;
and repeating the steps S1-S6, and constructing the multi-layer assembled building structure on the basis of the one-layer assembled building structure.
10. The implementation method of claim 2, wherein the step S4 is to place the prefabricated longitudinal beam on the corbels of the prefabricated transverse beam or the corbels of the prefabricated connecting node through the erection equipment;
the erecting equipment comprises a comprehensive installation hanging bracket and a plurality of temporary jacks, wherein high-strength bolts are arranged on supporting legs of the comprehensive installation hanging bracket, and the comprehensive installation hanging bracket is connected with pre-buried bolt holes arranged on the prefabricated cross beam through the high-strength bolts so as to be fixed on the prefabricated cross beam; the temporary jack is fixedly installed on the prefabricated connecting node through an embedded component on the prefabricated column, so that the temporary jack and the prefabricated connecting node are relatively fixed; the comprehensive installation hanging bracket is connected with the temporary jack, and the horizontal and longitudinal position adjustment is carried out on the prefabricated beam according to the requirement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112663819A (en) * | 2021-01-05 | 2021-04-16 | 中国建筑第五工程局有限公司 | Method for building pillar-free classroom |
| CN115302623A (en) * | 2022-08-26 | 2022-11-08 | 中铁十六局集团第三工程有限公司 | Narrow space beam end prestress tensioning process and continuous box girder structure |
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