CN115653095A - Method for quickly building assembled frame structure - Google Patents

Abstract

The invention relates to a rapid construction method of an assembled frame structure, which comprises the following steps: step 1: the integrated construction and the component prefabrication of the foundation bearing platform: the prefabricated parts comprise prefabricated main beams and prefabricated secondary beams; the integrated construction of the foundation bearing platform sequentially comprises bearing platform steel bar installation, pre-buried galvanized corrugated pipes, concrete pouring and galvanized corrugated pipe plugging; step 2: the vertical structure steel bars and the template are assembled and installed: sequentially processing a steel bar, binding a steel bar cage, hoisting the steel bar cage and fixing the steel bar cage and a template; and step 3: hoisting the template and the prefabricated part in sequence by using hoisting equipment and installing; and 4, step 4: taking the prefabricated part as a stress fulcrum, arranging a detachable conversion member, a temporary consolidation steel truss and the prefabricated part to cooperatively bear force to form a floor bearing plate structure without vertical support; and 5: and (5) constructing cast-in-place layer steel bars and pouring concrete. The invention reduces the field construction workload, improves the construction efficiency and shortens the construction period.

Description

A rapid construction method of prefabricated frame structure

technical field

The invention relates to the field of building construction, in particular to a rapid construction method of an assembled frame structure.

Background technique

At present, the design and construction of the construction industry are still dominated by concrete cast-in-place construction. Compared with other industries, there are serious shortages of industrialization, low production efficiency, relatively rough construction quality, high loss rate of building materials, and environmental pollution to the surrounding area. and many other issues. In addition, with the increasing steel production and technology, as well as the continuous increase in labor costs, the construction advantages of prefabricated buildings have become more prominent, and prefabricated steel structure residences that combine the advantages of prefabricated buildings and steel structures have become the development of residential buildings. important trends.

However, compared with traditional cast-in-place structures, the construction methods of prefabricated concrete structures in the industry are essentially the same. Full support systems, in-situ on-site steel reinforcement construction, vertical transportation by tower cranes and truck cranes are mostly used, while prefabricated structures are used in construction. The advantages of industrialization cannot be fully utilized. Therefore, how to provide a rapid construction method of a prefabricated frame structure that can reduce on-site construction workload, improve construction efficiency, and shorten construction period is a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

The invention provides a rapid construction method of an assembled frame structure to solve the above technical problems.

In order to solve the above technical problems, the present invention provides a rapid construction method of a prefabricated frame structure, comprising the following steps:

Step 1: Integrated construction of the foundation cap and component prefabrication: prefabricated components include prefabricated main beams and prefabricated secondary beams; the integrated construction of the foundation cap includes the installation of cap steel bars, pre-embedded galvanized corrugated pipes, and concrete pouring in sequence And galvanized bellows sealing;

Step 2: Combined installation of vertical structural steel bars and formwork: including steel bar processing, binding of steel cages, hoisting of steel cages, and fixing of steel cages and formwork in sequence;

Step 3: using lifting equipment to lift and install the formwork and the prefabricated components in sequence;

Step 4: Using the prefabricated component as the fulcrum of force, set the detachable conversion component, temporarily consolidated steel truss and the prefabricated component to cooperate with the force to form a floor deck structure without vertical support;

Step 5: Construction of cast-in-place layer reinforcement and concrete pouring.

Preferably, in step 1, the component prefabrication includes three-dimensional modeling using BIM, and using three-dimensional modeling to optimize structural nodes, component splitting, pipeline layout, and prestress settings.

Preferably, in step 1, when the concrete of the foundation cap is poured, there is a gap between the vibrating rod and the pre-embedded galvanized bellows.

Preferably, in step 2, a hole is reserved in the middle of the reinforcement cage of the vertical structure for allowing the pumping pipe to drop to the foot of the column.

Preferably, the side length of the hole is 150mm±20mm.

Preferably, in step 3, the hoisting equipment adopts a combination of hoisting machinery consisting mainly of crawler cranes and assisted by truck cranes.

Preferably, in step 3, when hoisting the formwork, the formwork is first hoisted horizontally from the ground with the main arm, and then vertically hoisted to the foot of the column with the auxiliary arm.

Preferably, in step 3, when the formwork is installed and dropped, 4 people stand in four directions to adjust the position with steel wire ropes, and 2 people support the column foot steel bar to fall into the center position of the galvanized bellows.

Preferably, in step 3, the verticality of the formwork is adjusted by diagonally pulling the steel wire rope.

Preferably, in step 3, an adjustable joint with a thickness of 50 mm is provided at the bottom of the template, and wooden wedges are used to adjust the elevation of the template.

Compared with the prior art, the rapid construction method of the fabricated frame structure provided by the present invention has the following advantages:

1. In the present invention, the integrated construction of the foundation cap, the integrated installation of the combination of vertical structural reinforcement and formwork, the construction of the unsupported prefabricated structure system, the hoisting equipment and mechanical layout, the BIM deepening of the prefabricated structure and the linkage and coordination of the component processing achieve a complete understanding of the frame. The rapid construction effect of the structure, so as to achieve the purpose of rapid construction;

2. The present invention reduces the amount of on-site construction work, improves construction efficiency, shortens the construction period, and more rationally allocates construction resources.

Description of drawings

Fig. 1 is the implementation flowchart of the fast construction method of prefabricated frame structure in a specific embodiment of the present invention;

Fig. 2 is a schematic diagram of the implementation of the rapid construction method of the prefabricated frame structure in a specific embodiment of the present invention.

In the figure: 01-floor, 10-foundation cap, 11-galvanized corrugated pipe, 20-formwork, 21-reinforcement cage, 22-column top beam pad, 31-prefabricated main beam, 32-prefabricated secondary beam.

Detailed ways

In order to describe the technical solution of the above invention in more detail, specific examples are listed below to demonstrate the technical effect; it should be emphasized that these examples are used to illustrate the present invention and not limit the scope of the present invention.

The rapid construction method of the assembled frame structure provided by the present invention, as shown in Figure 1 and Figure 2, includes the following steps:

Step 1: Integrated construction of the foundation cap 10 and component prefabrication: the prefabricated components include the prefabricated main girder 31 and the prefabricated secondary beam 32. In some embodiments, the prefabricated process may include BIM for 3D modeling, specifically Revit 3D modeling, using 3D modeling to optimize structural nodes, component splitting, pipeline layout, and prestressing settings, determine component division, reserved opening positions, prestressed tunnels, and carry out reinforcement design. According to the design results The components are disassembled and handed over to the manufacturer for processing.

The integrated construction of the foundation cap 10 sequentially includes the installation of cap steel bars, pre-embedded galvanized bellows 11, concrete pouring and galvanized bellows 11 sealing. Specifically, before installing the cap reinforcement on the floor 01, it is necessary to carry out all small strain inspections and re-checks on the axis and elevation of the pile foundation; the pre-embedded galvanized bellows 11 must be firmly fixed; There should be gaps between the galvanized corrugated pipes 11, and the vibrating rod is prohibited from touching the galvanized corrugated pipes 11 to prevent displacement or damage of the galvanized corrugated pipes 11; the bottom of the galvanized corrugated pipes 11 must be blocked, and the concrete slurry Do not enter the galvanized bellows 11, and the top port should be temporarily blocked.

Step 2: Combined installation of vertical structural steel bars and formwork 20: including steel bar processing, binding of steel bar cages 21, hoisting of steel bar cages 21, and fixing of steel bar cages 21 and formwork 20 in sequence. Specifically, the shape and size of steel bar processing should match the size of the steel column mold body, and the deepening drawing should be deepened according to the size of the finished column mold; during the binding process, the root of the column bar needs to be equipped with a positioning clip to ensure that the position of the steel bar is consistent with the pre-embedded galvanized corrugation. The vacancy of the tube 11 is consistent, and a large enough hole (not shown) must be reserved in the middle of the steel cage 21 to allow the pumping pipe to fall to the column foot; the hoisting point of the steel cage 21 must be fixed firmly to prevent safety accidents caused by falling off during the hoisting process; The fixed points of the cage 21 and the formwork 20 must be fixed firmly to prevent the reinforcement cage 21 from slipping after the formwork 20 is vertical;

Before hoisting the steel cage 21, it is necessary to check the cross-sectional size and length of the steel cage 21 in full, focusing on checking whether the cross-sectional size of the column cap and the positions of the locators and fixing parts are accurate and firm; (surface) has not reached the level, must adjust the level and then hoist it into the A piece mold (the mold for placing the reinforcement cage 21) in place, so as to facilitate the correction and positioning of the reinforcement cage 21; when the reinforcement cage 21 is in place, the thickness of the protective layer should be adjusted After checking, it can be positioned and fixed after meeting the design requirements.

Step 3: using lifting equipment to lift and install the template 20 and the prefabricated components in sequence. In some embodiments, when lifting the formwork 20, the main arm is used to hoist the formwork 20 horizontally from the ground, and then the auxiliary arm is used to vertically lift the formwork 20 to the foot of the column; when the formwork 20 is installed and dropped, four people Sub-station Quartet adjusts the general position of the template 20 with a steel wire rope, aligns the steel bar at the foot of the column with the center of the galvanized corrugated pipe 11 by two people, and slowly lowers it into place, so that the steel bar at the foot of the column falls into the center of the galvanized bellows 11 as much as possible position; the four steel wire ropes are obliquely pulled to adjust the verticality of the formwork 20; a 50mm thick adjustable joint is set at the bottom of the formwork 20, and wooden wedges are used to adjust the elevation of the formwork 20. Before the prefabricated components are installed on the formwork 20 , it is necessary to set the column top beam pad 22 to increase the bearing area.

Step 4: Taking the prefabricated components (prefabricated main girder 31 and prefabricated secondary girder 32) as the force fulcrum, set detachable conversion components, temporary consolidation steel trusses and the prefabricated components to cooperate with the force to form a vertically supported Floor deck structure. In this way, there is no need to set up vertical supports on site, thereby improving the flexibility of site construction.

Step 5: Construction of cast-in-place layer reinforcement and concrete pouring. Specifically, if the concrete pouring height is relatively high, a reasonable mix ratio must be designed according to factors such as column section, steel bar spacing, pouring, etc., to ensure the quality of the concrete pouring, and the concrete must not segregate; Leave a hole with a side length of 150mm±20mm (the drop area of the concrete pouring conduit), and use the conduit to send the concrete to the bottom of the column to ensure that the free fall height of the concrete does not exceed 1.5 meters; you can also inject 50mm thick mortar of the same strength before pouring the concrete. To ensure the appearance quality of the bottom of the column.

In some embodiments, in step 3, the hoisting equipment adopts a combination of hoisting machinery with crawler cranes as the main part and truck cranes as the auxiliary, combined with prefabricated slabs as a movable turnover yard, compared with traditional tower cranes and The fixed storage yard form greatly improves the lifting capacity and site mobility, and the weight of the frame structural members is heavier, which makes it more economical.

In addition, it is also possible to combine the permanent road with the equipment foundation and the hardening of the component layout area through the refined ground layout of the Yonglin combined horizontal passage, equipment transportation route and component layout area, and combine component connection, assembly and fixing forms and A detailed design of the site is required.

In summary, the rapid construction method of the prefabricated frame structure provided by the present invention includes the following steps: Step 1: Integrated construction of the foundation cap 10 and component prefabrication: the prefabricated components include the prefabricated main beam 31 and the prefabricated secondary beam 32; The integrated construction of the foundation cap 10 includes the installation of cap steel bars, pre-embedded galvanized corrugated pipes 11, concrete pouring and galvanized corrugated pipes 11 sealing; Steel bar processing, binding steel cage 21, hoisting of steel cage 21 and fixing of steel cage 21 and formwork 20; step 3: using lifting equipment to lift and install the formwork 20 and the prefabricated components in sequence; step 4: using the prefabricated The component is the force-bearing fulcrum, and the detachable conversion component, the temporarily consolidated steel truss and the prefabricated component are set to cooperate with the force to form a floor deck structure without vertical support; Step 5: Construction of cast-in-place layer reinforcement and concrete pouring. The present invention adopts the integrated construction preparation of the foundation cap 10, the combination and integrated installation technology of vertical structural steel bars and formwork 20, the construction technology of unsupported prefabricated structure system, the vertical and horizontal transportation construction technology of all mobile machinery, lifting equipment and mechanical layout , Prefabricated structure BIM deepening and component processing linkage, unsupported composite floor construction, site horizontal passage permanent combination and refined ground layout, etc., to achieve the rapid construction effect of the frame structure, so as to achieve the purpose of rapid construction. The invention reduces the amount of on-site construction work, improves construction efficiency, shortens the construction period, and more rationally allocates construction resources.

Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. A rapid construction method of an assembled frame structure is characterized by comprising the following steps:

step 1: the integrated construction and the component prefabrication of the foundation bearing platform: the prefabricated parts comprise prefabricated main beams and prefabricated secondary beams; the integrated construction of the foundation bearing platform sequentially comprises bearing platform steel bar installation, pre-buried galvanized corrugated pipes, concrete pouring and galvanized corrugated pipe plugging;

and 2, step: the vertical structural steel bars and the templates are assembled and installed: sequentially processing a steel bar, binding a steel bar cage, hoisting the steel bar cage and fixing the steel bar cage and a template;

and step 3: hoisting the template and the prefabricated part in sequence by using hoisting equipment and installing;

and 4, step 4: taking the prefabricated part as a stress fulcrum, arranging a detachable conversion member, a temporary consolidation steel truss and the prefabricated part to cooperatively bear force to form a floor bearing plate structure without vertical support;

and 5: and (5) constructing cast-in-place layer steel bars and pouring concrete.

2. The rapid construction method of an assembled frame structure according to claim 1, wherein in step 1, the prefabrication of the members comprises three-dimensional modeling by means of BIM, and the three-dimensional modeling is used for optimizing structure nodes, member disassembly, pipeline arrangement and prestress setting.

3. The rapid construction method of an assembled frame structure according to claim 1, wherein in the step 1, a gap is left between the vibrating rod and the pre-buried galvanized corrugated pipe when concrete of the foundation cap is poured.

4. The rapid construction method of an assembled frame structure according to claim 1, wherein in the step 2, a hole for allowing the pumping pipe to fall to the column base is reserved in the middle of the reinforcement cage of the vertical structure.

5. The rapid building method of an assembled frame structure according to claim 4, wherein the size of the side length of the hole is 150mm ± 20mm.

6. A rapid construction method of an assembled frame structure according to claim 1, wherein in step 3, the hoisting equipment adopts a combination of a crawler crane as a main hoisting machine and a truck crane as an auxiliary hoisting machine.

7. A rapid construction method of an assembled frame structure according to claim 1, wherein in the step 3, when the template is hoisted, the template is hoisted horizontally away from the ground by using the main arm, and then is hoisted vertically to the column foot by using the auxiliary arm.

8. The rapid construction method of an assembled frame structure according to claim 7, wherein in the step 3, when the formwork is installed and falls down, the position of the formwork is adjusted by using a steel wire rope at four directions of the 4-person substation, and the steel bar of the 2-person support foot falls into the center of the galvanized corrugated pipe.

9. A rapid construction method of an assembly type frame structure according to claim 8, wherein in the step 3, the steel wire ropes are obliquely pulled to adjust the verticality of the formwork.

10. A rapid construction method of an assembled frame structure according to claim 9, wherein in step 3, adjustable joints with a thickness of 50mm are provided at the bottom of the formworks, and the elevation of the formworks is adjusted using wooden wedges.

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