CN111663695A - A prefabricated formwork-free box-type floor and its construction technology - Google Patents

Abstract

The invention belongs to the technical field of construction applications, and specifically discloses an assembled formwork-free box-type floor and a construction process thereof, comprising a plurality of formwork, prefabricated rib beam bottom support plates, reinforced concrete prefabricated bottom plates, cast-in-place concrete rib beams, Several bottom reinforcement bars and several roof reinforcement bars, etc. The beneficial effect of the invention is that: the high-strength integral bottom plate formed by the combination of the prefabricated reinforced concrete bottom plate and the prefabricated rib beam bottom support plate is fully utilized as the template, the floor template is no longer required to be specially laid in a large area, and the template exemption rate reaches more than 85%. , which not only achieves the purpose of reducing self-weight and saving reinforced concrete, but also further saves the cost of formwork; the box-shaped floor has high bearing capacity, light weight, firm combination of prefabricated components and cast-in-place concrete rib beams, good integrity, and better mechanical performance than cast-in-place concrete. The effect of reinforced concrete rib floor is better; engineering application can save a lot of steel bars, concrete and formwork, the amount of on-site concrete pouring is small, the construction speed is fast, and the cost saving is obvious.

Description

A prefabricated formwork-free box-type floor and its construction technology

technical field

The invention belongs to the technical field of construction applications, and in particular relates to an assembled formwork-free box-type floor and a construction process thereof.

Background technique

For the convenience of construction and cost saving in the construction industry, bamboo-wood and aluminum-plastic building templates are widely used to build ribbed floors or hollow floors. These templates generally have problems such as limited turnover and low recycling value, especially bamboo and wood. The turnover of template and aluminum-plastic template generally does not exceed 10 times, resulting in a lot of resource consumption and waste. It is also easy to cause secondary pollution during the recycling process, which has a greater impact on the environment.

At present, the state calls for green and low-carbon development of the construction industry and vigorously promotes prefabricated buildings. Two important indicators are the factory prefabrication rate of building components and the template-free rate of on-site construction.

Therefore, based on the above problems, the present invention provides a prefabricated formwork-free box-type floor and a construction process thereof.

SUMMARY OF THE INVENTION

Purpose of the invention: The purpose of the present invention is to provide a prefabricated formwork-free box-type floor and its construction technology. Its technical design is reasonable, and the prefabricated high-strength reinforced concrete components are fully utilized to make the prefabricated box-type floor. The prefabricated bottom plate is combined. Assembled to form an integral bottom plate instead of the traditional special formwork, it is directly placed on the formwork, which is used as a force-bearing member and replaces the traditional formwork. It is no longer necessary to lay the formwork in a large area, and the formwork exemption rate reaches more than 85%. In order to reduce the self-weight and save the reinforced concrete, it further saves the cost of the formwork.

Technical solution: One aspect of the present invention provides an assembled formwork-free box-type floor, which includes several formwork frames, and prefabricated rib beam bottom pallets respectively arranged on several formwork frames, and respectively arranged on several formwork bases. frame, reinforced concrete prefabricated bottom plates between several prefabricated rib beam bottom plates, and cast-in-place concrete rib beams respectively arranged on the prefabricated rib beam bottom plates and located between adjacent reinforced concrete prefabricated plates, and Several groups of prefabricated concrete sidewall panels on the outer walls of both sides of the cast-in-place concrete rib beam, and reinforced concrete prefabricated top panels respectively arranged on the upper sidewalls of the adjacent cast-in-place concrete rib beams and used in conjunction with several groups of precast concrete sidewall panels, wherein , the reinforced concrete prefabricated bottom plate and the reinforced concrete prefabricated top plate are respectively provided with a number of bottom steel bars and a number of roof steel bars. Top stirrup locations for cast-in-place concrete rib beams.

According to the technical solution, the fabricated formwork-free box-type floor further includes rib beam main bars and stirrups arranged on the cast-in-place concrete rib beam, and are respectively connected with several groups of prefabricated concrete side wall plates and rib beam bottom support plates. Use in conjunction.

Another aspect of the present invention provides a construction process for an assembled formwork-free box-type floor, comprising the following steps: step 1, erecting several formwork; step 2, placing a reinforced concrete prefabricated floor; step 3, placing a rib beam bottom The prefabricated support plate and the prefabricated bottom plate form an integral bottom plate as a template; step 4, tie the rib beam reinforcement; step 5, place several groups of prefabricated concrete side walls; step 6, place the reinforced concrete prefabricated top plate;

Step 7, pouring the rib beam concrete; Step 8, curing the rib beam concrete; Step 9, removing the formwork to form a prefabricated box floor.

In this technical solution, in the steps 1, 2 and 3, the formwork is first designed and supported according to the drawings, then the prefabricated rib beam bottom pallet is positioned and placed according to the design position of the drawings, and finally the reinforced concrete prefabricated bottom plate is placed and adjusted. and squeeze it tightly to form a flat and firm whole, which is used as a bottom formwork; in the steps 4 and 5, insert the bottom reinforcement of the reinforced concrete prefabricated bottom plate into the bottom stirrup position of the cast-in-place concrete rib beam, and insert the bottom plate reinforcement of the reinforced concrete prefabricated bottom plate into the bottom stirrup position of the cast-in-place concrete rib beam. Bind the main reinforcement and stirrups of the rib beam in place, and place the precast concrete side wall; in the steps 6, 7, and 8, place the reinforced concrete prefabricated roof, and anchor the roof reinforcement of the reinforced concrete precast roof into the cast-in-place concrete rib beam The top stirrup position of the rib beam is formed by the rib beam steel bar and the steel bars of the prefabricated top plate and the prefabricated bottom plate together to form the rib beam reinforcement cage, and the rib beam concrete is poured and maintained; in the step 9, the cast-in-place reinforced concrete rib beam is maintained to achieve the design After the strength, the formwork is removed to form a prefabricated box-type floor composed of cast-in-place reinforced concrete rib beams, prefabricated reinforced concrete top plate, prefabricated reinforced concrete bottom plate, prefabricated concrete side wall plate and rib beam prefabricated concrete bottom support plate.

Compared with the prior art, the beneficial effects of a prefabricated formwork-free box-type floor and its construction process of the present invention are: 1. The prefabricated high-strength reinforced concrete components are used to make the prefabricated box-type floor, and the prefabricated components It is directly placed on the formwork, and it acts as a formwork during the construction process. After the concrete is poured, a unified structural whole is formed through curing. As a part of the stressed component, it participates in the overall stress; The floor no longer needs large-scale laying of formwork, and the formwork exemption rate reaches more than 85%, which not only achieves the purpose of reducing self-weight and saving reinforced concrete, but also further saves formwork costs; 3. The box-type floor has high bearing capacity, light weight, and prefabricated components. It is firmly combined with the cast-in-place concrete rib beam, has good integrity, and has better mechanical performance than the fully cast-in-place reinforced concrete rib floor; The speed is fast and the cost saving is obvious.

Description of drawings

Fig. 1 is the top view structure schematic diagram of a kind of prefabricated formwork-free box-type floor of the present invention;

Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1;

Fig. 3 is the partial enlarged structure schematic diagram of C place in Fig. 2;

4 is a perspective view of an assembled formwork-free box-type floor of the present invention;

Detailed ways

The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, Figure 3, Figure 3 and Figure 4, an assembled formwork-free box-type floor includes several formwork 5 and prefabricated rib-beam bottom pallets respectively arranged on several formwork 5 3, and be respectively arranged on the reinforced concrete prefabricated bottom plate 4 between several formwork 5, several prefabricated rib beam bottom support plates 3, and be respectively arranged on the prefabricated rib beam bottom support plate 3 and be located in the adjacent reinforced concrete prefabricated bottom plate 4 between the cast-in-place concrete rib beams 1, and several groups of prefabricated concrete side wall panels 6 that are respectively arranged on the outer walls of both sides of the cast-in-place concrete rib beams 1, and are respectively arranged on the upper side walls of the adjacent cast-in-place concrete rib beams 1 and The reinforced concrete prefabricated top plate 2 used in conjunction with several groups of prefabricated concrete sidewall panels 6, wherein, the reinforced concrete prefabricated bottom plate 4 and the reinforced concrete prefabricated top plate 2 are respectively provided with a number of bottom reinforcement bars 8 and a number of roof reinforcement bars 7. Several bottom reinforcement bars 8 and several roof reinforcement bars 7 are respectively inserted into the bottom stirrup positions of the cast-in-place concrete rib beam 1 and anchored into the top stirrup positions of the cast-in-place concrete rib beam 1 .

Further preferably, the prefabricated formwork-free box-type floor also includes rib beam main bars 9 and stirrups 10 arranged on the cast-in-place concrete rib beam 1, and are respectively connected with several groups of precast concrete side wall panels 6 and rib beams. Used in conjunction with the bottom bracket 3.

The construction method of the prefabricated formwork-free box-type floor of this structure is to design and support the formwork 5 according to the drawings first, locate and place the prefabricated rib beam bottom support plate 3 according to the design position of the drawing, and then place the reinforced concrete prefabricated bottom plate 4 and Adjust and squeeze to form a flat and firm whole, as the bottom formwork, the bottom steel bar 8 of the reinforced concrete prefabricated bottom plate 4 is inserted into the bottom stirrup position of the cast-in-place concrete rib beam 1, and the main reinforcement of the rib beam is bound at the position of the cast-in-place concrete rib beam 1 9 and stirrups 10, place prefabricated concrete sidewall panels 6, place reinforced concrete prefabricated roof panels 2, and anchor the top reinforcement bars 7 of the reinforced concrete prefabricated roof panels 2 into the top stirrup positions of the cast-in-place concrete rib beam 1, so that by the rib beam The steel bars and the steel bars of the prefabricated top plate and the prefabricated bottom plate together form the rib beam reinforcement cage, and the rib beam concrete is poured and maintained. Finally, the cast-in-place reinforced concrete rib beam 1 is cured and the formwork 5 is removed after reaching the design strength, forming a cast-in-place reinforced concrete rib. The beam 1, the prefabricated reinforced concrete top plate 2, the prefabricated reinforced concrete bottom plate 4, the prefabricated concrete side wall plate 6 and the rib beam prefabricated concrete bottom support plate 3 together constitute a prefabricated prefabricated box floor.

For the prefabricated formwork-free box-type floor of this structure, the main stress components are cast-in-place reinforced concrete rib beams 1, the reinforced concrete prefabricated bottom plate 4, and the reinforced concrete prefabricated top plate 2 are auxiliary stress components. The side wall plate 6 and the special precast concrete pallet at the bottom of the cast-in-place concrete rib beam are essential auxiliary components.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements can be made, and these improvements should also be regarded as the present invention. scope of protection.

Claims (4)

1. An assembled formwork-free box-type floor is characterized in that: comprising several formwork (5), and prefabricated rib beam bottom support plates (3) respectively arranged on several formwork (5), and Reinforced concrete prefabricated base plates (4) respectively arranged between a plurality of formwork (5) and a plurality of prefabricated rib beam bottom support plates (3), and respectively arranged on the prefabricated rib beam bottom support plates (3) and located in the opposite direction. The cast-in-place concrete rib beam (1) between the adjacent reinforced concrete prefabricated bottom plates (4), and several groups of precast concrete side wall panels (6) respectively arranged on the outer walls of both sides of the cast-in-place concrete rib beam (1), and A reinforced concrete prefabricated top plate (2) on the upper side wall of the adjacent cast-in-place concrete rib beam (1) and used in conjunction with several groups of prefabricated concrete side wall plates (6), wherein the reinforced concrete prefabricated bottom plate (4), the reinforced concrete The prefabricated top plate (2) is respectively provided with a plurality of bottom plate steel bars (8) and a plurality of top plate steel bars (7), and the plurality of bottom plate steel bars (8) and a plurality of top plate steel bars (7) are respectively inserted into the cast-in-place concrete rib beams ( 1) bottom stirrup position, anchored into the cast-in-place concrete rib beam (1) top stirrup position. 2. An assembled formwork-free box-type floor according to claim 1, characterized in that: the assembled formwork-free box-type floor further comprises ribs arranged on the cast-in-place concrete rib beam (1). The beam main reinforcement (9) and the stirrups (10) are respectively used in cooperation with several groups of precast concrete side wall panels (6). 3. the construction technique of a kind of prefabricated formwork-free box-type floor according to claim 2, is characterized in that: comprise the following steps, Step 1. Set up several mold bases; Step 2. Place the reinforced concrete prefabricated bottom plate; Step 3. Place the prefabricated pallet at the bottom of the rib beam and form an integral bottom plate with the prefabricated bottom plate as a template; Step 4. Bind the rib beam reinforcement; Step 5, place several groups of precast concrete sidewall panels; Step 6, place the reinforced concrete prefabricated roof; Step 7, pour the rib beam concrete; Step 8, rib beam concrete curing; Step 9. Remove the formwork to form a prefabricated box-type floor. 4. The construction process of an assembled formwork-free box-type floor according to claim 4, characterized in that: in the steps 1, 2 and 3, the formwork (5) is first designed and supported according to the drawings , and then locate and place the prefabricated rib beam bottom support plate (3) according to the design position of the drawing, and finally place the reinforced concrete prefabricated bottom plate (4) and adjust and squeeze it to form a flat and firm whole as a bottom formwork; the steps described above 4. In step 5, insert the bottom reinforcement bar (8) of the reinforced concrete prefabricated bottom plate (4) into the bottom stirrup position of the cast-in-place concrete rib beam (1), and bind the rib beam main reinforcement ( 9) and stirrups (10), place the prefabricated concrete sidewall panels (6); in the steps 6, 7, and 8, place the reinforced concrete prefabricated top panel (2), and place the reinforced concrete prefabricated top panel (2). The roof reinforcement bars (7) are anchored into the top stirrup positions of the cast-in-place concrete rib beams (1), so that the rib beam reinforcement bars and the reinforcement bars of the prefabricated roof and prefabricated bottom plates together form a rib beam reinforcement cage, and the rib beam concrete is poured and maintained; In step 9, the cast-in-place reinforced concrete rib beam (1) is cured to reach the design strength and then the formwork (5) is removed to form a cast-in-place reinforced concrete rib beam (1) and a prefabricated reinforced concrete roof (2), prefabricated reinforced concrete A prefabricated box-type floor is formed by a bottom plate (4), a prefabricated concrete side wall plate (6) and a rib beam prefabricated concrete bottom support plate (3).

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