CN201103182Y - PCM cast-in-situ reinforced concrete hidden rib non-plate internal mold - Google Patents

Abstract

A dark-tight-rib no plate typed internal mold used for PCM cast-in-situ reinforcement concrete is provided, which pertains to the technical field of building structure and is especially applicable to beam or beamless hollow floor in industrial building and civil building. The internal mold adopts the technology in which a precast hollow cavity component is used in dark-tight-rib hollow floor made by once-molding concreting and is characterized in that the dark-tight-rib no plate typed internal mold is formed with reinforcing steel bars or steel concrete ribs which are arranged in grid pattern and empty cavity components which are formed between the ribs in a diamond gap or a rectangle gap; the height of the ribs is the same as the height of the empty cavity components, and the shape of the ribs is matched with the shape of the empty cavity components. By the floor system, the weight of the floor formed by the once-molding concreting can be greatly reduced; earthquake resistance performance can be improved; sound insulation effect is good and users can design room compartments and decorate at will.

Description

A PCM cast-in-place reinforced concrete hidden rib plateless inner formwork

technical field

The utility model relates to a PCM cast-in-place reinforced concrete concealed rib plateless inner form, which belongs to the technical field of building structures. It is especially suitable for beamed and beamless hollow-core slabs of industrial and civil buildings. It is a technology of using prefabricated cavity components in the concealed ribbed hollow-core slabs cast by one-time forming concrete.

Background technique

The cast-in-place hollow floor structure system commonly used in the field of building structures uses hollow pipes arranged longitudinally and parallel in the slab. Such a structure has obvious defects in the vertical and horizontal two-way force transmission of the floor, and the amount of steel and concrete is still too large. And increase building dead weight and construction cost. In recent years, more and more cast-in-place ribbed floors have been used in buildings with large spans to save the amount of steel and concrete and reduce the weight of the floor. At present, most of the cast-in-situ densely ribbed floors are formed by large-scale special formwork, which is difficult to make molds, difficult to construct, and high in construction costs. Moreover, the densely ribbed ceiling affects the appearance, and the appearance needs to be improved by means of hanging items, and there is no mold in the formwork. Therefore, the overall strength and rigidity of the formwork are poor, and the formwork is prone to cracking.

Contents of the invention

The purpose of the utility model is to provide a PCM cast-in-place reinforced concrete concealed rib plateless inner mold. The use of this inner mold can greatly reduce the weight of the floor poured with one-time molding concrete, improve the anti-seismic performance, and has good sound insulation effect, and is convenient for users to design room partitions and implement decoration by themselves.

In order to achieve the above-mentioned technical purpose, the technical solution adopted by the utility model includes the following contents: a PCM cast-in-place reinforced concrete concealed rib plateless inner mold, which is composed of steel bars or steel and concrete arranged in a grid The ribs are composed of cavity components placed in the rectangular or diamond-shaped gaps formed between the ribs. The height of the ribs is the same as that of the cavity components and the shapes match each other.

The ribs are force-bearing components formed by co-casting and tamping of steel bars, steel or other force-bearing materials and concrete.

The vertical cross-section of the ribs is rectangular or trapezoidal. When the ribs are trapezoidal, the size of the lower part is larger and the size of the upper part is smaller. The grid formed by the ribs is rectangular or rhombus, that is, the rib beams can be orthogonal or oblique.

The cavity component is a component with a cavity in the middle which is composed of reinforced fiber mortar or reinforced concrete and a support. The upper part or the lower part of the cavity member or the upper and lower parts are provided with reinforcement ribs along the horizontal direction, and both ends of the reinforcement ribs protrude out of the cavity member for a certain distance.

The reinforcements are steel bars, prestressed reinforcements, steel wires, steel fibers, fiber filaments, bundles or other reinforcements. The cross-section of the cavity member in the vertical direction is a rectangular or inverted trapezoidal structure, which matches the cross-sectional shape of the rib.

By adopting the above-mentioned technical solutions, the utility model has obtained the following positive technical effects: firstly, the construction speed of the floor is increased At the same time, due to the use of a large number of prefabricated cavity components, the cost of the building is reduced, and the amount of formwork is reduced during the construction process; with the floor of the above structure, the construction site only needs to pour grid ribs. part, the difficulty of construction is reduced; the thickness of the concealed rib is basically the same as that of the cavity prefabricated component due to the above-mentioned technology, which reduces the storey height and increases the effective use space of the building; When the ribs and the cavity components corresponding to their shapes are under pressure, the vertical pressure can be decomposed into lateral pressure to the ribs, and the pressure on a single cavity component can be transmitted to the entire floor; through the cavity components The protruding reinforcing ribs are set to be welded or bound to the steel bars in the grid-like ribs, so that the prefabricated cavity components can form a whole with the above-mentioned grid-like ribs after pouring concrete, thereby increasing the strength and stability of the building. stiffness.

Description of drawings

Fig. 1 is the bottom view of cavity member;

Fig. 2 is the front view of cavity member;

Figure 3 is a side view of a cavity member;

Fig. 4 is the top view of cavity member:

Figure 5 is a top view of a grid-shaped ribbed floor;

Fig. 6 is a cross-sectional view of a floor with lattice ribs.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1-4, the component shown in the figure is made of concrete. The upper and lower ends of the component are rectangular or rhombus-shaped, the sides are rectangular or rhombus-shaped, and the middle part is a cavity corresponding to its shape. The upper end surface 4 is provided with reinforcing ribs 1, and the reinforcing ribs 1 are located in mortar or concrete, and are arranged in parallel along the horizontal direction according to the strength requirements during use. When the strength requirement is high, the above-mentioned reinforcing ribs 1 can be arranged in an orderly manner orthogonally or obliquely: when the size of the component is small or the strength requirement is not high, the reinforcing rib 1 may not be provided; In the case of high height, reinforcing ribs 1 are also arranged in the lower end surface 2 thereof. The height and thickness of the reinforcing rib 1 and whether to configure the reinforcing rib can be determined according to the structural design requirements, so that the strength and rigidity of the cavity member of the present utility model are greatly improved. At the same time, it has the characteristics of simple structure, good water tightness, light weight, convenient construction and transportation. There are reinforcing ribs 1 in the cavity member or a reinforcing mesh or a combination of the two. The reinforcing ribs 1 are respectively steel bars, prestressed steel bars, steel wires, steel fibers, fiber wires, bundles or other reinforcing bars, and the reinforcing nets are respectively reinforcing bars. , steel wire mesh, fiber mesh, non-woven adhesive cloth mesh or other reinforced cloth, mesh. These tendons, wires, and nets are used in different occasions, and the formed structures, shapes, local structures, and stress characteristics are also different. For example, steel bars bear the main force, and wires and nets mainly bear local forces and are used for crack prevention structures. Prestressed steel bars can prestress the structural bottom plate, making the structural bottom plate stronger and more resistant to deformation and cracks. Since the cavity member and the structural bottom plate have reinforcing ribs or reinforcing nets, the strength of the entire cavity member is high, and the force transmission is more reasonable. Using this cavity member to cast a dense ribbed plateless hollow floor can be hung and objects carrying heavy weights. In addition, when making the above-mentioned cavity components, the reinforcing ribs can also be provided with exposed ribs, exposed nets or exposed bundles. In this way, the exposed reinforcement or exposed mesh can better improve the bonding force between the cavity component and the cast-in-place rib, effectively prevent the cracking of the joint interface between the cast-in-place and prefabricated, and is conducive to the force transmission and coordinated force of the floor. The structures, shapes and effects formed by tendons, exposed nets or exposed bundles are not exactly the same. In the above-mentioned cavity member, the thickness of the side surface 3 is preferably smaller than the thickness of the upper end surface 4 and the lower end surface 2, which can better reduce the weight of the entire cavity member. The outer surface of the cavity member is a corrugated or toothed or brushed or rough surface in other shapes. In this way, the cavity member can better enhance the bond between it and the rib when it is applied to the floor. The cavity component is a layered structure with at least two layers, consisting of a layer of cementing material, a layer of cloth or net, a layer of cementing material, a layer of cloth or net, and a layer of cementing material. The cloth or net is at least more than one floor. The cement can be various types of cement, resin or organic or inorganic or mixed adhesives, and aggregates or fillers can also be added appropriately.

The above-mentioned cavity is also provided with a support. The shape of the support is cross-shaped. The height of the support should generally be the same as the height of the inner space of the cavity. Such an arrangement can make the upper and lower end surfaces pass through the support. Withstand pressure to prevent crushing the upper surface. The supports are made of reinforced fiber cement mortar, reinforced concrete, wood, organic compounds or other materials. When the size of the cavity member is large or requires high strength, the well-shaped support can be used, and when the size of the cavity member is small or the strength requirement is low, the straight support or no support can be used pieces. In addition, there is another way of filling the cavity. Part or all of the cavity is filled or pasted with foam plastic, expanded perlite, expanded vermiculite, foamed or aerated lightweight concrete, rock wool, mineral wool or glass wool and other lightweight materials. Material. In this way, the cavity components have better thermal insulation, heat insulation and sound insulation properties. Different materials have different structures and functions, and different functions, so different filling methods can be selected according to the actual design. Holes for threading pipes or pre-buried threading sleeves can also be reserved on the cavity member, which is more convenient for the layout and construction of network cables.

As shown in Fig. 5 and Fig. 6, the use process of the cavity member in the utility model. As shown in FIG. 5 , the above-mentioned cavity member is arranged in a structure composed of ribs corresponding in size and size to the cavity, and the above-mentioned interior is provided with rib reinforcement bars 8 . The process of using the above-mentioned cavity member is generally as follows. First, according to the design requirements, determine the size and strength of the concealed rib, the number of steel bars and the layout of the steel bar, and use these data to determine the size of the cavity member, the size of the support and Strength and other data, make the corresponding cavity components, according to the corresponding parameters of the cavity components during construction, set the rib steel bars on the formwork in a grid, then place the cavity components in the grid, and finally pour the concrete. By using the above structure The purpose of using ribs is to further increase the overall strength and rigidity of the cavity member, and to increase the overall connection between the cavity member and the hidden rib. The manufactured floor not only saves cost, but also has the main feature of saving floor height. The size and thickness of the poured floor is the same as the thickness of the cavity, forming a plateless cast-in-place hollow floor. The upper and lower surfaces of the slabless cast-in-place floor are directly composed of the upper and lower end faces of the cavity component body, and there is no need to pour a certain thickness of concrete slab on the upper or lower part of the component like the existing cast-in-place hollow floor technology .

Claims (8)

1. A PCM cast-in-place reinforced concrete concealed rib plateless internal mold is characterized in that: the cavity in the rectangular or rhombus-shaped gap formed between the reinforcing bars or reinforced concrete ribs arranged in a grid and placed between the ribs The height of the rib is the same as that of the cavity member and the shapes match each other. 2. A PCM cast-in-situ reinforced concrete concealed rib plateless inner formwork according to claim 1, characterized in that: said ribs are stress components formed by pouring and pounding steel bars and concrete together. 3. A kind of PCM cast-in-place reinforced concrete concealed rib plateless inner mold according to claim 1, characterized in that: the vertical section of the rib is rectangular or trapezoidal, and when it is trapezoidal, the size of its lower part Larger, the upper part is smaller in size. 4. A kind of PCM cast-in-place reinforced concrete concealed rib plateless inner mold according to claim 1, characterized in that: the grid formed by the ribs is rectangular or rhombus, and the ribs can be orthogonal, Can also be oblique. 5. A kind of PCM cast-in-place reinforced concrete hidden rib plateless inner mold according to claim 1, characterized in that: the middle part of the cavity member made of reinforced fiber cement mortar or reinforced concrete has a cavity components. 6. A kind of PCM cast-in-place reinforced concrete concealed rib plateless inner mold according to claim 1, characterized in that: the upper or lower part of the cavity member or the upper and lower parts are provided with reinforcing ribs in the horizontal direction at the same time, Moreover, both ends of the reinforcing rib extend out of the cavity member. 7. A kind of PCM cast-in-place reinforced concrete concealed rib plateless inner mold according to claim 1, characterized in that: the reinforcing ribs are respectively steel bars, prestressed steel bars, steel wires, steel fibers, fiber wires, bundles . 8. A PCM cast-in-place reinforced concrete concealed rib plateless inner mold according to claim 1, characterized in that: the vertical section of the cavity member is a rectangular or inverted trapezoidal structure, and the Compatible cross-sectional shape.

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