CN104314213A - Novel large-span assembly type hollow groined floor system - Google Patents

Abstract

The invention discloses a novel large-span assembly type hollow groined floor system which is composed of a plurality of blocks of prefabricated floors capable of being spliced and concrete post-cast strips located between adjacent prefabricated floors. Each prefabricated floor comprises a top plate, a base plate, longitudinal ribbed beams and transverse ribbed beams, wherein the longitudinal ribbed beams and the transverse ribbed beams are arranged between the top plate and the base plate. The top plates and the base plates are parallel surface plates. The novel large-span assembly type hollow groined floor system effectively solves the problem of the traditional assembly type integrated floors of small span, poor rigidity and large concrete consumption. The concrete consumption at the connection positions of all the prefabricated floors is small, template consumption is small, and the prefabricated floors are few in shapes, convenient to construct, economical and practical. The integral floor system formed by assembling all the prefabricated floors is of a hollow groined structure and has the advantages of bidirectional force transfer, large rigidity, good shock resistance and small self weight and thickness. Light thermal insulation materials are filled in the hollow positions of the floor system so that the heat retaining property of the floor system is improved. Pipes can be arranged in the floor system in a penetrating mode without additional equipment layers, and therefore space is saved and storey clear height is increased.

Description

A new type of large-span prefabricated hollow well-shaped floor

technical field

The present invention belongs to the field of construction, in particular to a novel large-span assembled hollow well-shaped floor.

Background technique

The building floor is an important horizontal structural load-bearing component, which transfers various loads acting on the floor to the vertical load-bearing components such as beams, walls, columns, and also connects the vertical load-bearing structures into a whole.

At present, the common floors are mainly concrete floors, including cast-in-place concrete floors, prefabricated concrete floors and prefabricated monolithic floors.

The cast-in-place concrete floor slab is a completely wet operation on site, which is difficult and requires a lot of work. At the same time, a large number of formwork turnover is required, and the cost is high. Moreover, the construction quality mainly depends on the skills of on-site workers and on-site management. If a large-area floor slab is poured at one time, it is necessary to overcome the cracking problem of the slab surface.

The prefabricated concrete floor is fully prefabricated and connected to beams, walls, etc. on site. There is only dry work on site, and the construction period is short, but there is no firm connection between components, poor node performance, and poor overall performance.

At present, more and more assembled integral floor slabs combine the advantages of good integrity of cast-in-place floor slabs and simple and economical on-site operations. However, the existing assembled monolithic floor slabs have a small span and cannot meet the needs of large bays. The size of the lower beam of the floor slab is large, and the indoor effect is poor, which requires the owner to carry out ceiling decoration in the later stage. At the same time, most of the floors are solid and heavy, so it is necessary to set up a separate equipment floor space, which affects the indoor net height.

Contents of the invention

Purpose of the invention: to provide a novel large-span assembled hollow well-shaped floor to solve the above-mentioned problems in the prior art.

Technical solution: A new type of large-span prefabricated hollow well-shaped floor, which is composed of several prefabricated floor slabs that can be spliced with each other and concrete post-cast strips between adjacent prefabricated floors; each prefabricated floor includes a roof, a bottom slab and a set A longitudinal rib beam and a transverse rib beam between the top plate and the bottom plate; the top plate and the bottom plate are planar plates parallel to each other.

In a further embodiment, two-way stressed steel bars are arranged in the top plate and the bottom plate, and longitudinal steel bars and stirrups are arranged in the rib beams. The steel bar extends outward, and its protruding length meets the requirements of the connection length of the steel bar. There is an accommodating space between the top board and the bottom board, which is filled with sound insulation and thermal insulation materials. The prefabricated floor slab is poured with concrete, and the side surface of the slab end is rough. The prefabricated floor is preset with holes for placing pipeline equipment. Each floor slab is assembled on all sides, and the spacing ratio of longitudinal rib beams and transverse rib beams in the overall floor formed by the assembly is 1.

Beneficial effects: the advantages of the present invention include: the bottom of the floor is flat, the ceiling can be exempted from decoration, the net height of the room can be increased, and the indoor space can be easily separated in the planning. The rib beam and the upper and lower slabs are poured together, and the integrity of the floor slab is good, which avoids water seepage and other problems; effectively solves the problems of small span, poor rigidity, and large amount of concrete in the traditional assembled integral floor slab; The amount of formwork is less, the form of prefabricated floor slabs is less, the construction is convenient, economical and practical; the overall floor assembled by each prefabricated floor is a hollow well-shaped structure, which has two-way force transmission, high rigidity, good earthquake resistance, small self-weight, small thickness, etc. Benefits: The hollow part of the floor is filled with light-weight insulation materials, which increases the heat preservation of the floor; pipes can be pierced in the floor, and there is no need to set up another equipment floor, which saves space and increases the net height of the floor.

Description of drawings

Fig. 1 is a schematic diagram of a single prefabricated floor slab in the present invention.

Fig. 2 is an overall schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the connection of the prefabricated floor in the utility floor.

Detailed ways

As shown in Figures 1 and 2, the new large-span hollow self-insulating floor of the present invention adds a reinforced concrete floor to the traditional well-shaped floor to form a hollow floor structure with a flat bottom. Several prefabricated floor slabs are spliced and assembled through vertical and horizontal two-way concrete post-casting connection belts. A single floor slab has an integrally prefabricated top slab, bottom slab, and longitudinal and horizontal rib beams in the middle, and reserved steel bars protrude around the slab.

The prefabricated floor slab includes a top slab 1, a bottom slab 2, a number of well-shaped intersecting rib beams 3, and thermal insulation and sound insulation fillers 4; The directions are arranged at equal distances, and the thermal insulation and sound insulation fillers 4 are arranged between the rib beams 3 and fill up the gaps between the rib beams 3 .

The top slab 1, bottom slab 2 and rib beam 3 of the single prefabricated floor slab are made of one-time integrated cast-in-situ reinforced concrete.

As shown in Figure 1, the top slab 1 and the bottom slab 2 of a single floor slab are provided with two-way horizontal steel bars along the vertical and horizontal directions, and the steel bars extend out around the floor slab to form reserved steel bars, which are connected to each other when connecting floors and other components. Lap joints and assemble with cast-in-place concrete.

The rib beam 3 of the floor slab is provided with longitudinal bars and stirrups, and the longitudinal bars protrude out of the floor slab to form reserved steel bars, which are welded to each other when connecting floors and other components, and assembled through cast-in-place concrete connecting belts; The ratio of rib-beam spacing in the vertical and horizontal directions in the floor slab should be 1 and not greater than 2. The sides of the prefabricated slabs are roughened for reinforcement and connection to the cast-in-place concrete. Holes can be reserved on the floor to facilitate the placement of piping equipment.

As shown in Figure 3, the floor of the present invention is composed of multiple prefabricated floor slabs and cast-in-place concrete connecting strips, and the construction process is: setting out wires—placement formwork and support—hoisting prefabricated floor slabs—fixed support—binding steel bars on site 8 ——Pouring the connecting strip concrete 9. Connect the reserved steel bars 5 protruding in the connection direction of the prefabricated floor slabs at the joints between the slabs, place the stirrups of the rib beams, support the bottom form of the bottom slab 2, and place the thermal insulation filler 10 to be used as the top slab 1 and the bottom slab 2 formwork, pouring concrete. In a construction case, the relevant data are: overall floor span: 10m, thickness 350mm; single floor: length 4600mm, width 2950mm, top slab thickness 80mm, bottom slab thickness 60mm; rib beam: width 250mm, height 350mm, spacing 2000mm.

In a word, the novel large-span assembled hollow well-shaped floor of the present invention adopts vertical and horizontal concrete post-cast belts to connect hollow prefabricated floor slabs to form a large-span floor. It is suitable for all kinds of long-span houses, PCSI houses and houses that require no beams under the slab. The invention has a two-way force-bearing large-span concrete hollow floor slab with well-shaped rib beams, which can solve the problems of small span, poor rigidity, and poor heat preservation of the assembled integral floor slab, and can reduce on-site wet operations, speed up the construction period, and save engineering costs.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be carried out to the technical solutions of the present invention. These equivalent transformations All belong to the protection scope of the present invention. In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention. In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (7)

1. the hollow groined slab floor of novel large span assembling, is characterized in that, the precast floor slab that can mutually be spliced by several piece and the late poured band between contiguous prefabricated floor form; Each precast floor slab comprises top board (1), base plate (2) and the longitudinal girt strip be arranged between top board and base plate and horizontal girt strip (3); Described top board and base plate are the surface plate be parallel to each other.

2. the hollow groined slab floor of novel large span assembling as claimed in claim 1, is characterized in that, configures bidirectional stress reinforcing bar (5), configure longitudinal reinforcement and stirrup in girt strip in described top board and base plate.

3. the hollow groined slab floor of novel large span assembling as claimed in claim 2, it is characterized in that, reinforcing bar stretches out, and its extension elongation meets the requirement of bar connecting length.

4. the hollow groined slab floor of novel large span assembling as claimed in claim 1, has accommodation space (4), is wherein filled with sound-insulating material between described top board and base plate.

5. the hollow groined slab floor of novel large span assembling as claimed in claim 1, is characterized in that, described precast floor slab is concreting, and its plate end side surface is crude.

6. the hollow groined slab floor of novel large span assembling as claimed in claim 1, is characterized in that, is preset with the duct for placing pipe-line equipment in described precast floor slab.

7. the hollow groined slab floor of novel large span assembling as described in any one of claim 1 to 6, is characterized in that, every block floor surrounding is all assembled, and in the integral cover that assembling is formed, the gap ratio of vertical girt strip, gate beam is 1.