阅读说明：本技术 钢筋混凝土框架结构自支撑模壳 (Self-supporting formwork of reinforced concrete frame structure ) 是由 张鹏程 王权民 卫振海 于 2021-07-01 设计创作，主要内容包括：本发明公开钢筋混凝土框架结构自支撑模壳由柱脚模壳、柱段模壳、柱梁节点模壳、梁模壳组成模壳框架,每个模壳内中空并设有钢筋笼,在模壳内可灌注温凝土生成钢筋混凝土柱梁,本发明模筋框架完全自立,基本不需搭设支架支托,直接在底周封闭的模腔里浇筑混凝土,工序少,更节约。(The invention discloses a self-supporting formwork of a reinforced concrete frame structure, which comprises a formwork framework consisting of a column foot formwork, a column section formwork, a column beam node formwork and a beam formwork, wherein each formwork is hollow and is provided with a reinforcement cage, and warm concrete can be poured into the formwork to generate a reinforced concrete column beam.)

1. Reinforced concrete frame structure self-supporting mould shell, its characterized in that: the shuttering frame is composed of column foot shuttering, column section shuttering, column beam node shuttering, and beam shuttering, each shuttering is hollow and provided with a reinforcement cage, warm concrete can be poured into the shuttering to generate reinforced concrete column beam, the column foot shuttering is fixed on the foundation, the lower end of the column section shuttering is connected with the column foot shuttering, the upper end is connected with the column beam node shuttering, the beam shuttering is inserted in the column shuttering pipe on the column beam node shuttering, the shuttering and the shuttering are connected through the penetrated shuttering mortise and tenon, the beam shuttering width is less than 1/2 of the column shuttering width.

2. A reinforced concrete frame structure self supporting formwork as claimed in claim 1, wherein: the beam formwork shell is formed by splicing a plurality of sections of formwork shells.

3. A reinforced concrete frame structure self supporting formwork as claimed in claim 1, wherein: the formwork is formed by pressing one of glass Fiber Reinforced Plastic (FRP), cement mortar or fiber composite mortar and one of a steel wire mesh, a steel bar mesh, a steel plate mesh, a profiled steel sheet and a galvanized iron sheet.

Technical Field

The invention relates to a construction technology, in particular to a concrete structure construction technology.

Background

Along with the gradual reduction of the agricultural workers, the building construction of China has to be carried out industrially and in an assembled mode gradually. The existing construction technology of the fabricated concrete structure is as follows: the concrete column, beam, plate and other members are prefabricated in a factory, the members are large and heavy, secondary transportation is needed, large vehicles are needed for transportation and hoisting, and the energy consumption is very large; the steel bars among the huge components need to be connected one by adopting sleeve grouting, the implementation is very difficult, workers often have to cut off several steel bars which cannot be installed, the connection quality is difficult to guarantee, quality problems and potential safety hazards can be caused, and the manufacturing cost is very high.

The 'overlapping pouring' technology is generally completed by two parts, namely, a steel reinforcement cage is generally manufactured in a factory, concrete with certain thickness at the bottom and the outer side is poured to be about 5cm thick, the prefabricated hollow shell or semi-thick plate is transported and hoisted, and the concrete of the rest part (1/3-1/2) is poured after the steel reinforcement is connected, namely, each member needs two times of pouring concrete in different time to 'overlap'. The reinforced concrete shell is still heavier, the size of the reinforced concrete shell is still large, the column and the beam are respectively and independently manufactured, and the field connection area is a column-beam joint area with larger stress and is unfavorable for earthquake resistance.

Chinese utility model patent CN202021164348.1 discloses a superposed beam and thin-walled steel tube concrete column just hinge joint node, adds the welded U-shaped steel corbel and trompil beam-penetrating reinforcing bar through the steel-pipe column and makes beam reinforcing bar and steel-pipe column wall be connected and form the node. Although unique, the structural form of the steel pipe concrete column and the reinforced concrete beam is not common and is obviously different from the common reinforced concrete column and the reinforced concrete beam. The column is a thin-wall steel pipe, and the steel pipe needs to bear all construction loads in the construction stage.

Disclosure of Invention

The invention provides a reinforced concrete frame structure which is not supported by steel pipes and does not need to be dismantled.

In order to achieve the purpose, the self-supporting formwork of the reinforced concrete frame structure is characterized in that: the shuttering frame is composed of column foot shuttering, column section shuttering, column beam node shuttering, and beam shuttering, each shuttering is hollow and provided with a reinforcement cage, warm concrete can be poured into the shuttering to generate reinforced concrete column beam, the column foot shuttering is fixed on the foundation, the lower end of the column section shuttering is connected with the column foot shuttering, the upper end is connected with the column beam node shuttering, the beam shuttering is inserted in the column shuttering pipe on the column beam node shuttering, the shuttering and the shuttering are connected through the penetrated shuttering mortise and tenon, the beam shuttering width is less than 1/2 of the column shuttering width.

The beam formwork shell is formed by splicing a plurality of sections of formwork shells.

The shuttering is formed by pressing one of glass Fiber Reinforced Plastic (FRP), cement mortar or fiber composite mortar and one of a steel wire mesh, a steel bar mesh, a steel plate mesh, a profiled steel sheet and a galvanized sheet iron

After the scheme is adopted, the formwork and the section containing the reinforcement cage are produced in a factory, and the column and beam longitudinal reinforcements are lapped near the end opening of the formwork. Assembling the formwork on site, connecting the reinforcement cage, forming a column beam formwork reinforcement cage framework capable of standing by, and then pouring column beam concrete. The mould rib frame is completely self-supporting, and the concrete is directly poured in the mould cavity with the closed bottom periphery without erecting a support bracket basically, so that the designed reinforced concrete frame column beam structure is formed. Compared with the existing prefabricated concrete structure construction technology, the prefabricated member and the grouting connecting steel bar assembly are assembled to form the prefabricated formwork and the steel reinforcement cage, and concrete is poured in the cavity. "has the following significant advantages: (1) the investment of a prefabrication factory is not needed, a steel bar shed can be erected on the engineering site to perform the prefabrication of the steel bar cage and the formwork, and the construction cost is greatly reduced; (2) the die rib part has light dead weight and small volume, is more suitable for carrying and mounting by manpower, small machinery and robots, and has lower energy consumption; (3) the method protects and continues to use, does not abandon the mature commercial concrete industrial chains in various places, does not damage the existing capacity, does not cause industrial unemployment, and saves a large amount of heavy-cargo long-distance transportation and large-tonnage crane shifts. Compared with the existing 'superposed system' concrete structure technology, the proposal does not need to pour concrete twice, only needs to pour all the concrete once, has less working procedures and saves more time.

Drawings

FIG. 1 is a schematic view of a formwork frame of the present invention;

FIG. 2 is a cross-sectional view of a column form shell structure of the present invention;

FIG. 3 is a cross-sectional view of a closed beam formwork arrangement of the present invention;

FIG. 4 is a cross-sectional view of an open beam formwork arrangement of the present invention.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1 to 4, the self-supporting formwork of the reinforced concrete frame structure of the present invention is a formwork with a column and a beam, which is divided into: column foot formworks (not shown in the figure), column section formworks 1, column beam node formworks 2 and beam formworks 3. The shuttering is produced in factory and contains steel bar cage section, and is made of one of glass Fiber Reinforced Plastic (FRP), cement mortar or fiber composite mortar and one of steel wire mesh, steel bar mesh, steel plate mesh, profiled steel plate and galvanized sheet iron. The column and beam longitudinal steel bars are cold welded near the end of the shuttering by lapping, inserting, binding and quick hardening grouting. The design of the reinforced concrete structure of the inner cavity of the formwork still follows the existing 'concrete structure design standard', and basically no adjustment is needed. In order to facilitate assembly, the column longitudinal bars are arranged to be deviated to the corners as much as possible, the beam preferably passes through the center of the column, and the width of the beam is not larger than 1/2 of the width of the column, so that the formwork tenon-and-mortise work 6 penetrates through the column. The column-beam joint area ensures that the column stirrups are not lost and broken. The beam shuttering 3 can only be used as the column shuttering 4, the shuttering does not need to be through, and the beam longitudinal bar is through.

During construction, a column beam formwork is installed firstly, a steel reinforcement cage 5 penetrates into the formwork, and column beam longitudinal reinforcements are connected near the end opening of the formwork through one of lap joint, clamp sleeve, electroslag pressure welding and sleeve grouting. The shuttering is connected with the shuttering through a shuttering mortise and tenon joint 5. Assembling a hollow formwork pipe-steel reinforcement cage-framework structure on site, and then pouring self-compacting concrete into the pipe cavity of the beam column formwork to generate a reinforced concrete column beam; and after the strength of the beam column concrete reaches over 75 percent, secondary beam and floor concrete are poured. A connecting piece is arranged between the formwork and the steel reinforcement cage, and the formwork is used for bearing dead weight, the weight of wet concrete poured in the beam column, the pressure of a pipe cavity and certain construction impact load by means of the steel reinforcement cage in the construction stage. After the building, the shuttering is reserved as a protective surface layer and a decorative surface layer. The shuttering is designed, produced and assembled according to the figure 1, and forms a shuttering frame (framework shuttering) by adopting the respective proper shuttering splicing and connecting technology.

The column model shell is shown in figure 2, the beam model shell is shown in figures 3 and 4, the design of the reinforced concrete structure of the inner cavity of the model shell is still designed according to the current concrete structure design specification, and basically no adjustment is needed. In order to facilitate assembly, the column longitudinal bars are arranged to be deviated to the corners as much as possible, the beam preferably penetrates through the center of the column, and the width of the beam is not larger than 1/2 of the width of the column, so that the formwork can conveniently penetrate through the tenon-mortise. The column-beam joint area ensures that the column stirrups are not lost and broken. The beam formwork can only be used as a column formwork pipe, the formwork does not need to be communicated, and the beam longitudinal ribs are communicated.

The invention changes the ' prefabricated component assembly and steel bar grouting connection ' of the existing prefabricated concrete structure into ' prefabricated formwork assembly and steel bar cage assembly, and concrete is poured in the cavity. Taking a frame structure as an example, the area allowing the overlap joint of the steel bars shown in a design drawing is used as a dividing surface, the frame structure is divided into (1) a column foot section, (2) a column middle section, (3) a column beam node section, (4) a beam middle section, four types of steel bar cages and an external formwork, after being manufactured respectively, the steel bar cages are transported to the site, and the connection of the steel bars of the cage sections is finished through overlap binding, so that a 'mould rib frame' is formed. The mould rib frame is completely self-supporting, and the concrete is directly poured in the mould cavity with the closed bottom periphery without erecting a support bracket basically, so that the designed reinforced concrete frame column beam structure is formed.

In the prior art, the technology of 'superimposed casting' such as superimposed slabs, superimposed beams, superimposed columns and the like is the closest to the technology of the invention. The superposition casting technology is generally completed by two parts, a steel reinforcement cage is generally manufactured in a factory, concrete with certain thickness at the bottom and the outer side is cast to be about 5cm thick, the prefabricated hollow shell or semi-thick plate is transported and hoisted, and the concrete of the rest part (1/3-1/2) is cast after the steel reinforcement is connected, namely, each member needs to be cast twice with different time to be superposed. The reinforced concrete shell is still heavier, the size of the reinforced concrete shell is still large, the column and the beam are respectively and independently manufactured, and the field connection area is a column-beam joint area with larger stress and is unfavorable for earthquake resistance.

The self-supporting framework is formed by means of early tiny elastic stress of the column and beam reinforcement cage, the template is added for sealing, and then all concrete is poured at one time. The templates used by the newspaper are wood templates, steel templates, aluminum templates and decorative plates, the templates only bear local wet concrete pressure, and the templates are not stressed any more after the internal concrete is solidified. The application proposal is different from the CN202021164348.1 utility model in that (1) a steel pipe column is not used; (2) the concrete is poured once without superposition.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.