CN204098313U - Two-way mixing cross wise reinforcement truss self-supporting hollowcore slab - Google Patents

Abstract

The utility model relates to a floor bearing slab, in particular to a self-supporting hollow slab of a two-way mixed cross steel bar truss, which belongs to the technical field of floor bearing slabs for construction engineering. Especially suitable for steel structure residential floor deck. It includes a triangular section steel truss floor deck and a plane steel truss arranged in a direction orthogonal to it; in another direction perpendicular to the triangular section steel truss, a plane steel truss connected with the triangular section steel truss is fixed to form a mutual vertical One side is a triangular section steel truss, and the other is a two-way load-bearing floor slab with a plane steel truss; waterproof and thermal insulation blocks are placed in each grid formed by the steel truss in two directions, which are combined with post-cast concrete to form a The honeycomb concrete load-bearing hollow slab of the thermal insulation block. The beneficial effect is that the self-weight of the floor deck can be ensured under the premise of normal construction under the action of construction load, and the thermal effect of the floor deck can be improved.

Description

Self-supporting hollow slab of two-way hybrid cross steel truss

technical field

The utility model relates to a floor bearing slab, in particular to a self-supporting hollow slab of a two-way mixed cross steel bar truss, which belongs to the technical field of floor bearing slabs for construction engineering. It is especially suitable for steel structure residential floor decks. the

Background technique

At present, the steel truss floor deck system is generally adopted in the building steel structure. The steel truss floor deck system consists of 5 steel bars in the floor, including 2 web bar bars 3, 1 upper chord bar 1 and 2 lower chord bars. Reinforcement 2, a structurally stable triangular truss is formed in the factory through processes such as automatic forming, high-frequency resistance spot welding, on-line detection and automatic shearing, and then the steel structure building is integrated by resistance spot welding of the rebar truss and galvanized profiled steel plate Carrier products. Compared with the traditional cast-in-place slab, the truss force mode can provide greater stiffness of the floor slab, which can greatly reduce or eliminate the need for temporary support for construction. Since there is no need for scaffolding and formwork, the construction efficiency has indeed been improved to a certain extent. Its structure is shown in Figure 1. the

However, this traditional reinforced truss floor deck system has only one direction of reinforced truss under construction conditions. In order to prevent excessive deformation and damage under the action of construction load and wet concrete self-weight, the height of the reinforced truss is generally large. Generally, the thickness of the concrete after pouring can reach or even exceed 150mm, so that the self-weight of the structure increases and the net height of the building is occupied because the floor deck is too thick, which also leads to an increase in cost and limits its use in residential projects. Applications. the

Contents of the invention

In order to overcome the shortcomings of the traditional steel truss floor deck system that the floor deck is too thick, the utility model provides a two-way hybrid cross steel truss self-supporting hollow slab. Steel trusses form a two-way load-bearing floor slab system that has always been triangular-section steel trusses and plane steel trusses. The purpose of reducing the self-weight of the floor deck, reducing the cost and improving the thermal performance. the

The technical solution adopted by the utility model to solve the technical problem is: a self-supporting hollow slab of a two-way hybrid cross steel bar truss, which includes a triangular section steel bar truss floor deck and a planar steel bar truss arranged in a direction orthogonal to it; The other direction perpendicular to the truss is fixed with a plane steel truss connected to the triangular section steel truss, thus forming a two-way load-bearing floor deck with a triangular section steel truss in one direction and a plane steel truss in the other direction; The plane steel bar truss includes a lower chord steel bar, an upper chord steel bar and a triangular wave-curved web bar between the lower chord steel bar and the upper chord steel bar; The upper chord nodes are aligned and welded together, so that the planar steel trusses are located in the vertical plane; waterproof and thermal insulation blocks are placed in each grid formed by the steel trusses in two directions, and combined with post-poured concrete to form a honeycomb with thermal insulation blocks inside Concrete load-bearing hollow slab. the

Further, the height of the waterproof and thermal insulation block is less than or equal to the height of the upper and lower end faces of the two-way hybrid cross steel truss. the

The above-mentioned technical scheme is based on the traditional steel truss floor deck, and the plane steel bar truss is installed on site in another direction during the construction and installation process, thus forming a two-way load-bearing floor deck system with triangular section steel bar truss and plane steel bar truss. The steel trusses in the two directions are jointly stressed and deformed, and jointly bear the construction load. Place waterproof and thermal insulation blocks in the steel truss grid in two directions (the upper surface is flush with the lower surface of the upper chord of the steel truss) and then pour concrete to form a honeycomb thermal insulation block in the concrete slab to reduce the weight of the floor deck and improve Thermal effect of floor deck. the

The beneficial effect of the utility model is that it can ensure that the self-weight of the floor slab is reduced under the premise of normal construction under the action of construction load, and the purpose of improving the thermal effect of the floor slab is achieved, and it is especially suitable for the steel structure Residential floor decking. the

Below in conjunction with accompanying drawing and implementation example the utility model is further described. the

Description of drawings

Figure 1 is a schematic diagram of the existing traditional reinforced truss floor deck structure;

Fig. 2 is a three-dimensional solid diagram of the existing traditional reinforced truss floor deck;

Figure 3 is a schematic diagram of a planar steel truss structure;

Figure 4 is a schematic diagram of the self-supporting hollow slab structure of the two-way mixed cross steel truss;

Fig. 5 is the physical figure of Fig. 4;

Figure 6 is a cross-sectional view of the self-supporting hollow slab of the two-way hybrid cross-bar truss after pouring concrete;

Fig. 7 is a structural schematic diagram of the limit steel frame;

Fig. 8 is a schematic diagram of a waterproof and heat-insulating block placed on a limiting steel bar frame. the

In the figure, ① upper chord reinforcement, ② lower chord reinforcement, ③ web reinforcement, ④ galvanized steel plate, ⑤ upper chord node, ⑥ waterproof insulation block, ⑦ limit reinforcement frame, ⑧ limit grip. the

Detailed ways

As shown in Figure 3, Figure 4 and Figure 5, the triangular cross-section steel truss (the thick line part in Figure 3) is formed by resistance welding in the production plant according to the designed spacing and the 0.5-1mm thick galvanized steel plate, and the first production is shown in Figure 1 The ordinary one-way triangular steel truss floor deck shown in Figure 2 is then processed into a planar steel truss as shown in Figure 2 and a gap is left on its lower chord. Insert the notched planar steel truss ⑦ (thin line part in Fig. 3) into the triangular steel truss space of the ordinary one-way triangular steel truss floor deck shown in Fig. The upper chord nodes of the steel trusses are aligned to keep the planar steel trusses in the vertical plane. Welding the bottom chord steel bar of the planar steel bar truss and the bottom chord steel bar of the triangular steel bar truss vertically in the horizontal plane can produce a two-way mixed cross steel bar truss self-supporting floor deck. Then place the limit reinforcement frame ⑦ shown in Figure 7 in the placement of the reinforcement truss grid, and fix the limit catch ⑧ at two diagonal points of the limit reinforcement frame ⑦ with 0.5-1mm thick galvanized steel plate ④ spot welding; After being fixed, it is shown in Figure 6; then, as shown in Figure 8, place a waterproof and thermal insulation block on the limit steel frame ⑥ and then pour concrete to form a honeycomb thermal insulation block in the concrete slab to improve the thermal effect of the floor deck ; See Figure 6 for the cross-sectional view of the self-supporting hollow slab of the two-way hybrid cross-bar truss. the

Claims (4)

1. a two-way mixing cross wise reinforcement truss self-supporting hollowcore slab, is characterized in that, the plane steel bar girder that it comprises triangular cross-section steel bar truss floor support plate and arranges with its orthogonal direction; Be fixedly installed the plane steel bar girder linked together with triangular cross-section steel bar girder in another direction vertical with triangular cross-section steel bar girder, thus formation is hung down mutually, one of friendship to being triangular cross-section steel bar girder, another floor support plate to the two-way load-bearing for plane steel bar girder; Described plane steel bar girder comprises a lower edge reinforcing bar, a reinforcing bar and be arranged on lower edge reinforcing bar and web member reinforcing bar that a triangularity wave winding up between reinforcing bar is bending of winding up; Together with wind up node and the node that winds up of triangle steel bar girder of described plane steel bar girder align and be welded and fixed, plane steel bar girder is made to be positioned at vertical plane; In each grid that both direction steel bar girder is formed, be placed with waterproof thermal-insulated block, be combined in being formed the cellular concrete bearing hollowcore slab having and be incubated block with after-pouring concrete.

2. two-way mixing cross wise reinforcement truss self-supporting hollowcore slab according to claim 1, is characterized in that, described waterproof thermal-insulated block is positioned in each grid of both direction steel bar girder formation by limit steel bar frame.

3. two-way mixing cross wise reinforcement truss self-supporting hollowcore slab according to claim 2, it is characterized in that, described limit steel bar frame is the framework coordinated with waterproof thermal-insulated block be connected into by steel bar welding, four angles of framework have and stretches out the upper and lower position-limited claw of framework, the lower extreme point solid welding of position-limited claw fixes on galvanized steel plain sheet.

4. two-way mixing cross wise reinforcement truss self-supporting hollowcore slab according to claim 1, it is characterized in that, the height of described waterproof thermal-insulated block is less than or equal to the height of profound lower surface on two-way mixing cross wise reinforcement truss.