CN207160354U - An integrated assembled lightweight floor slab - Google Patents

Abstract

The utility model discloses an integrated assembled light floor belongs to the building material field. This integrated assembled light floor does not destroy major structure stress system, and monoblock integrated form floor adopts the factory modularization production, improves the assembly rate, and integrated floor adopts the bolt formula to be connected with the steel construction girder, the manifold cycles of being convenient for use. The welding quantity is not much, and the integral height of the integrated floor slab is small, so that the indoor clear height is effectively improved. Meanwhile, the floor slab uses less steel, and the construction cost is effectively reduced.

Description

An integrated assembled lightweight floor slab

technical field

The utility model belongs to the field of steel structure buildings, in particular to an integrated assembled light-weight floor slab.

Background technique

From 2013 to 2016, the central government successively issued the "Green Building Action Plan", "Guiding Opinions of the State Council on Resolving Serious Overcapacity Conflicts", "Action Plan for Promoting the Production and Application of Green Building Materials", "Regarding the Resolution of Excess Capacity in the Iron and Steel Industry to Get Out of Difficulties Development Opinions" and other four related documents and a number of supporting documents to promote steel structure buildings, increase the use of steel structures in the field of public buildings, and promote earthquake-resistant buildings such as light steel structure integrated houses in areas with high incidence of natural disasters such as earthquakes.

At present, in prefabricated steel structure buildings, improved concrete floor slabs occupy the mainstream position, including reinforced truss floor decks, prefabricated steel truss laminated slabs, etc. Reinforced truss floor slabs can avoid the formwork process and cost, but the slab needs to be cast-in-place, and there are a lot of wet work on site. The process of removing the thin steel plate at the bottom of the floor slab is time-consuming and labor-intensive. The prefabricated steel truss laminated slab reduces on-site wet work. The joint between the floor slab and the steel beam is the joint of the laminated slab. This part needs to be connected by on-site steel reinforcement and cast-in-situ concrete, and there is still on-site wet work. The above two floor slabs have not been fully industrialized and cannot be recycled for many times.

With the development of prefabricated technology, a steel structure truss floor has gradually entered the market. This floor can realize complete industrial production, and the integration of steel beams and floors can be completed on the factory's professional production line. Although this kind of floor is suitable for steel structure buildings, the integration of steel beams and floors leads to the truncation of steel columns, which has a great impact on the force transmission effect of vertical stressed members and the integrity of steel columns. Later, although there were improved products to ensure that the steel columns were not cut off to ensure the vertical force transmission effect of the steel structure building, the amount of welding of the truss-type steel beams was too much, the overall height of the integrated floor was relatively large, and the amount of steel used was relatively large. The overall cost is higher.

In this context, research and development design an integrated assembled lightweight floor slab suitable for steel structure buildings, without destroying the stress system of the main structure. The main beam of the structure is connected by bolts, which is convenient for repeated use. The amount of welding is not much, and the overall height of the integrated floor is small, which effectively improves the indoor net height. At the same time, the amount of steel used in the floor slab is small, which effectively reduces the construction cost.

Utility model content

The purpose of the utility model is to solve the problems existing in the prior art, and to provide an integrated assembled lightweight floor. The integrated assembly lightweight floor slab does not damage the stress system of the main structure. The entire integrated floor slab is produced in a factory modularized manner to improve the assembly rate. The integrated floor slab and the steel structure main beam are connected by bolts, which is convenient for multiple cycles. The amount of welding is not much, and the overall height of the integrated floor is small, which effectively improves the indoor net height. At the same time, the amount of steel used in the floor slab is small, which effectively reduces the construction cost.

The concrete technical scheme that the utility model adopts is as follows:

Integrated assembled lightweight floor slabs, including cement fiber boards, steel structure well-shaped beams and steel structure keels; steel structure well-shaped beams are welded by several rectangular steel pipes in a well-shaped shape; The well-shaped beam and the steel structure keel form the main structure of the floor. The cement fiber board is used as the base of the floor, laid on the surface of the main structure of the floor and assembled with the main structure of the floor through connectors; Nodes on steel girders.

Preferably, the connection node includes a vertical connection steel plate and two horizontal connection steel plates, and screw holes are opened on the three connection steel plates, and the screw holes on the horizontal connection steel plates are elliptical.

Preferably, the connecting piece is a self-tapping screw.

Another purpose of this utility model is to provide an integrated assembled lightweight floor structure, including steel structure main girder, cement fiber board, steel structure well-shaped beam and steel structure keel; the steel structure well-shaped beam is welded by several rectangular steel pipes in a well shape The steel structure keel is laid on the steel structure well-shaped beam, the steel structure well-shaped beam and the steel structure keel form the main structure of the floor slab, and the cement fiber board is used as the base layer of the floor slab, laid on the surface of the main floor structure and assembled with the main structure of the floor slab through connectors The ends of the rectangular steel pipes are all fixed with connection nodes; the steel structure main beam is erected horizontally on the steel structure steel column as the stressed beam of the floor slab; the steel structure main beam is provided with several connection nodes Corbels with matching positions, the main structure of the floor slab is fixed on the corbels through each connection node; there is a supplementary section between the cement fiber board and the steel structure main beam, and its width is between the edge of the cement fiber board and the The distance between the edges of the flange plates of the main girder of the steel structure.

As a preference, the connection node includes a vertical connection steel plate and two horizontal connection steel plates. Screw holes are provided on the three connection steel plates, and the screw holes on the horizontal connection steel plates are oval; At the same time, a node positioning plate matching the vertical connecting steel plate is fixed, and the two are connected by 10.9-grade M20 high-strength bolts; two horizontal connecting steel plates are connected to the corbel by M16 ordinary bolts.

Compared with the prior art, the utility model has the following beneficial effects:

1) The integrated assembled lightweight floor slab of the steel structure building does not damage the stress system of the main structure. It adopts factory modular production and cooperates with the modular tools of the factory's professional production line. It can be mass-produced, and the convenient and fast production process can improve Processing speed and processing quality, reduce processing costs.

2) The surface is flat, and the decorative ground layer can be directly installed without secondary plastering and leveling. There is no wet work on site and does not affect the environment.

3) To improve the rate of assembly, the integrated floor slab and the main beam of the steel structure are connected by bolts, which can realize multiple recycling in different places.

4) The overall height is small, effectively increasing the indoor net height. The amount of steel used for the floor slab is small, which effectively reduces the construction cost.

5) The on-site process is reduced, and only needs to be installed directly, which has obvious advantages in reducing the construction period.

Description of drawings

Figure 1 is a plan view of the main structure of the integrated assembly lightweight floor slab;

Figure 2 is an elevation view of the integrated assembly lightweight floor;

Fig. 3 is a structural schematic diagram of the connection between the integrated assembled lightweight floor slab and the steel structure main beam;

Figure 4 is a schematic diagram of the installation floor location connection;

Figure 5 is a schematic diagram of the reverse assembly of the integrated floor steel components;

Figure 6 is a schematic diagram of four-point hoisting.

In the figure: 1. Steel structure steel column; 2. Steel structure main beam; 3. Steel structure well beam; 4. Steel structure keel; 5. Cement fiber board; 6. 10.9 grade M20 high-strength bolt; 7. M16 ordinary bolt; 8. Supplementary section; 9. Self-tapping screw; 10. Oval hole; 11. Platform; 12. Base; 13. Corbel.

Detailed ways

The utility model will be further elaborated and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment in the utility model can be combined correspondingly on the premise that there is no mutual conflict.

As shown in Figures 1 to 3, an integrated assembled lightweight floor slab includes cement fiber board 5, steel structure cross beam 3 and steel structure keel 4; steel structure cross beam 3 is welded by several rectangular steel pipes in a well shape As a result, the cross-sectional size of the steel pipe is 100mm to 150mm, which is determined by design calculations, effectively increasing the indoor net height. A steel structure keel 4 is laid on the steel structure well-shaped beam 3, and the steel structure well-shaped beam 3 and the steel structure keel 4 form the main structure of the floor slab. face comfort. Steel structure well-shaped beams and steel structure keels are commonly used finished steel pipes in the market, which are easy to purchase. The cement fiberboard 5 is used as the base of the floor, laid on the surface of the main structure of the floor and assembled with the main structure of the floor by self-tapping screws, the distance between the self-tapping screws is 200mm. The ends of the rectangular steel pipes are fixed with connection nodes, which are used to connect the nodes on the main beam 2 of the interlayer steel structure.

The connection node includes one vertical connection steel plate and two horizontal connection steel plates, and the three connection steel plates are all provided with screw holes, and the screw holes on the horizontal connection steel plates are elliptical.

The lightweight floor slab is used to be hoisted to the main beam 2 of the steel structure, and its assembly structure is shown in FIG. 4 . The steel structure main girder 2 is erected horizontally on the steel structure steel column 1, and serves as a stressed beam of the floor slab. The steel structure girder 2 is provided with several corbels 13 matching the positions of the connection nodes. The connecting nodes at the end of the steel structure well-shaped beam 3 include a vertical connecting steel plate and two horizontal connecting steel plates. There are screw holes on the three connecting steel plates, and the screw holes on the horizontal connecting steel plates are elliptical. There are node settings on the long side and short side of the light floor, so the installation position in the two directions can be adjusted by using the oval hole to prevent the problem that the integrated light floor can not be installed in place due to processing and installation errors. Node positioning plates matching the vertical connecting steel plates are also fixed on the corbels, and the node positioning plates can also be fixed on the corbel 13 in advance, and the main structure of the floor slab is fixed on the node positioning plates through each connecting node. Among them, the vertically connected steel plates are connected by 10.9-grade M20 high-strength bolts 6, and the two horizontally connected steel plates are connected by M16 ordinary bolts 7. There is a supplementary section between the cement fiber board 5 and the steel structure main beam 2, and its width is the distance between the edge of the cement fiber board and the flange plate edge of the steel structure main beam 2, which may be 200mm. Setting up the supplementary section is beneficial to the installation of the integrated prefabricated lightweight floor.

The cement fiber board 5 adopted in the utility model is 20mm thick, and the bulk density is only about half of the bulk density of reinforced concrete, which belongs to lightweight materials. The surface is flat, and the decorative ground layer can be directly installed without secondary plastering and leveling, and there is no wet work on site. The joints of the cement fiber boards 5 are all on the surface of the main structure of the steel structure, and the distance between the two cement fiber boards 5 is 10mm, serving as floor expansion joints.

The spacing between the steel beams of the steel structure well-shaped girder, and the spacing between the steel structure keels and the well-shaped beams are all modular values. For example, if the modulus is 300mm, the spacing is an integer multiple of 300mm. Modular tire mold tools, mass production of integrated assembled lightweight floor main structure, convenient and fast production process can improve processing speed and processing quality, and reduce processing cost. The integrated assembled light-weight floor slab is connected to the main beam of the steel structure by bolts, and there is no welding on site, which can realize multiple recycling in different places.

The following introduces a construction method of an integrated assembled lightweight floor slab, the steps are as follows:

1. Cutting of steel structure components: including floor beams and gusset plates, using CNC cutting machine equipment to ensure accuracy requirements.

2. Node assembly: Assemble the blanked and punched node plates into nodes according to the diagram. Make simple assembly molds to improve assembly efficiency and quality.

3. Composition and processing of tire mold platform:

(1) The tire mold platform is composed of a base and a steel plate. The platform needs to use H-shaped steel with a high flatness of the flange plate. The steel plate is drilled by a CNC plane drilling machine and used after tapping;

(2) The tire mold platform is processed and manufactured by reverse assembly, that is, the steel plate after drilling and tapping is laid on the operation platform, and the H-shaped steel is assembled according to the hole position.

(3) Requirements for the tire mold platform: the surface flatness of the platform is ≥1/1000, there are multiple sets of positioning holes, each set of 4 holes, and the corresponding hole positions can be selected according to the size of the rectangular tube for use.

4. The composition and processing of the backing:

(1) The backing is divided into a large backing and a small backing, with the same width and a large difference in length. Its main function is the positioning of steel beams and skeletons, which are made of steel plates;

(2) The steel plate is cut by CNC and drilled by a CNC plane drilling machine, and assembled vertically;

(3) Requirements for backing: surface flatness ≥ 1/1000, multiple sets of positioning holes, each set of 2 holes, which can be selected according to the size of the rectangular tube for use.

5. Operation points for assembling floor beams and integrated floor steel components on tire formwork:

(1) In order to make full use of the flatness of the tire formwork platform and reduce the processing error caused by the supporting pads, the floor beam integrated floor steel components are assembled on the opposite side, as shown in Figure 5, which is used in the main structure of the floor slab Install the side of the cement fiber board 5 facing the tire mold platform for installation;

(2) Large backing positioning: Before the backing is positioned, check its verticality with a square; select the corresponding hole to install the bolts according to the size of the rectangular tube, and calibrate the distance between the platform hole and the back of the backing limb;

Small backer positioning on one side: at least 2 points of positioning, and according to the size of the rectangular tube, select the corresponding hole to install the bolt, and calibrate the distance between the hole position of the platform and the back of the backer;

Node positioning: Calibrate the node position with the spacing between two adjacent node holes;

(3) Floor beam positioning: the bottom is close to the surface of the platform, the side is close to the back of the mountain limb, and the diagonal distance of the floor beam is calibrated;

(4) Positioning of the small backing on the other side: Clamp the floor beam components with the aforementioned backing to meet the requirement that three points form a line;

(5) Spot welding assembly: keep a sufficient distance between the spot welding position and the platform, so as not to damage the flatness of the platform surface;

(6) Repeat (5) (6) (7) process to carry out keel assembly;

(7) Clean up the welding slag on the tire mold platform.

6. After the assembly is completed, the floor beam integrated floor steel components are transferred from the tire mold platform to the welding production line for full welding, shot blasting, painting and other processes. Before shot blasting, the integrated components need to be calibrated and ground on the side of the floor where the floor is installed, especially the welds at the joints between floor beams and keels, and floor beams and nodes.

7. Typesetting of floor and base boards:

(1) The typesetting of the floor slab should be divided into the integrated processing part of the professional production line of the factory and the supplementary part of the construction site;

(2) 3-5mm pores are reserved for the base slab of the adjacent floor as expansion joints;

(3) The numbering rules for the factory integrated processing part are as follows:

aJL—b—c

In the formula, a—indicates the number of layers, such as 2, 3, 4...etc.;

JL——Indicates integrated floor;

b——Indicates the integrated floor number, such as 1, 2, 3...etc.;

c—indicates the number of the base plate on the integrated floor, such as 1, 2, 3...etc.

(1) The numbering rules for the supplementary sections on the construction site are as follows:

aJL—b.d

In the formula, a—indicates the number of layers, such as 2, 3, 4...etc.;

JL——Indicates integrated floor;

b——Indicates the integrated floor number, such as 1, 2, 3...etc.;

d——Indicates the node number on the integrated floor, such as 1, 2, 3...etc.

8. Floor slab cutting: use woodworking equipment to cut, and number it in a prominent position according to the rules.

9. Floor base plate installation:

(1) Stretch the line on the base plate of the floor to indicate the corresponding position of the keel and the steel beam;

(2) Punch holes on the base plate of the floor at a distance of 20cm;

(3) self-tapping screw installation.

10. Transportation protection:

(1) Integrated floors can be stacked up and down, but at least two sleepers should be placed symmetrically between two adjacent integrated floors;

(2) The integrated floor slab must be equipped with corresponding numbered supplementary cement fiber boards before leaving the factory, and other heavy objects such as steel components must not be stacked on the cement fiber boards.

(3) There must be special protective equipment for node protection to prevent node distortion;

11. On-site hoisting of the integrated floor: adopt the form of one hook and multiple lifting points to control the inclination of the integrated floor to <10% during the hoisting process, which is convenient for node positioning adjustment and installation; the node positioning plate can be used as the floor support for fine-tuning of positioning without the need for Set up the support frame; after the elevation is calibrated, install the bolts at the nodes.

Integrated floor stacking on site:

(1) The stacking site of the integrated floor slab must be flat, and there should be no protrusions on the ground;

(2) The integrated floors can be stacked up and down, but at least two sleepers should be placed symmetrically between each two adjacent integrated floors, and the height of the sleepers should be consistent to keep the integrated floors level;

(3) No more than 5 modules can be stacked up and down on the integrated floor;

(4) There are certain defensive measures, such as rain tarpaulins.

Hoisting target:

(1) Control the inclination of the integrated floor slab hoisting process < 10% and the flatness after being in place ≥ 1/1000;

(2) The damage of integrated parts is small;

(3) The nodes are in place smoothly and the bolts are installed smoothly;

Lifting sling requirements:

(1) Use a flat lifting belt to reduce the sliding of the integrated floor during the hoisting process and protect the paint on the surface of the steel member;

(2) The material of the hoisting belt is a mixture of synthetic fiber, high-quality polyester and strong drawing;

(3) Selection of the tonnage of the hoisting belt: the limit tonnage of the hoisting belt ≥ max (integrated floor weight) × 5-6.

Hanging point selection:

(1) When the length of the hoisting belt is sufficient, the two-belt four-point hoisting method can be used;

(2) When the length of the hoisting belt is insufficient, a four-belt and four-point hoisting method is required.

The hoisting state is shown in Figure 6.

Installation positioning and adjustment:

(1) Part of the joint plate at the joint of the integrated floor of the floor beam can be used as a floor support, so there is no need to erect a support frame at the lower part of the integrated floor, and the operator only needs to perform installation on the same floor where the integrated floor is installed;

(2) When the integrated floor is hoisted, at least two positioning traction ropes need to be tied. When the integrated floor is hoisted above the installation position, the installer will gradually lower it to the installation floor through the adjustment of the traction rope, so as to reduce the integration caused by the movement of the boom of the truck crane. Floor shaking and inaccurate positioning;

(3) According to the gap reserved at the joint, drop the integrated floor to the corresponding joint plate of the main beam that can be used as an installation support;

(4) After the integrated floor is stable, remove the hoisting belt, and fine-tune the positioning with installation tools such as crowbars until the holes of each node are aligned;

(5) Altitude calibration with a level gauge;

(6) Horizontal calibration of the leveling rod;

(7) The bolts should be installed symmetrically on both sides at the same time.

12. Treatment of paint damage: If the paint is damaged during the hoisting process, after the node installation is completed, the paint needs to be painted on site before proceeding to the next process.

13. The installation of the supplementary section of the floor: within a certain range of the node of the integrated floor is the supplementary section of the floor.

Post-fill segment stacking:

(1) The floor slab of the supplementary section shall complete the cutting process on the factory's professional production line and number it

(2) The supplementary sections on different integrated floors should be stacked in blocks;

(3) There must be certain rainproof measures, such as rain tarpaulins.

Subsequent section installation:

(1) Calibrate the surface flatness of the node connection;

(2) Place the cement fiberboard of the post-filling section according to the number;

(3) Stretch the line on the cement fiber board to indicate the corresponding position of the keel and the floor beam;

(4) Punch holes in the cement fiberboard at a distance of 20cm, avoiding the node area;

(5) self-tapping screw installation.

14. Floor layer installation: Before the floor layer is installed, paint the self-tapping nails on the cement fiber board with antirust agent, and fill the joints of the cement fiber board.

The above-mentioned embodiment is only a preferred solution of the present utility model, but it is not intended to limit the present utility model. Various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present utility model.

Claims (5)

1. a kind of integrated assembled type light floor, it is characterised in that including cement fibrolite plate（5）, steel construction cross beam（3）And steel Structure keel（4）；Steel construction cross beam（3）It is welded by some rectangular steel pipes in groined type；Steel construction cross beam（3）On It is equipped with steel structure keel（4）, steel construction cross beam and steel structure keel form floor agent structure, cement fibrolite plate（5）Make For floor basic unit, it is laid on floor agent structure surface and is assembled integrally by connector and floor agent structure；Rectangle steel The end of pipe is respectively and fixedly provided with connecting node, for connecting interlayer steel construction girder（2）On node.

2. integrated assembled type light floor as claimed in claim 1, it is characterised in that described connecting node includes one piece and erected Screw, and the screw on horizontal connection steel plate are offered on to three pieces of junction steel plates of junction steel plate and two blocks of horizontal connection steel plates It is oval.

3. integrated assembled type light floor as claimed in claim 1, it is characterised in that described connector is self threading pin.

4. a kind of integrated assembled type light floor, it is characterised in that including steel construction girder（2）, cement fibrolite plate（5）, steel knot Structure cross beam（3）And steel structure keel（4）；Steel construction cross beam（3）It is welded by some rectangular steel pipes in groined type；Steel Structure cross beam（3）On be equipped with steel structure keel（4）, steel construction cross beam and steel structure keel composition floor agent structure, Cement fibrolite plate（5）As floor basic unit, floor agent structure surface is laid on and by connector and floor agent structure group Dress up one；The end of rectangular steel pipe is respectively and fixedly provided with connecting node；Described steel construction girder（2）Level frame is located at steel construction steel Post（1）On, the bearing beam as floor；Steel construction girder（2）It is provided with what several agreed with described connecting node position Bracket, described floor agent structure are fixed on by each connecting node on described bracket；Described cement fibrolite plate（5）With Steel construction girder（2）Between leave after mend section, its width is cement fibrolite plate edge and steel construction girder（2）Between flange plate edge Distance.

5. integrated assembled type light floor as claimed in claim 4, it is characterised in that described connecting node includes one piece and erected Screw, and the screw on horizontal connection steel plate are offered on to three pieces of junction steel plates of junction steel plate and two blocks of horizontal connection steel plates It is oval；The node locating plate to match with described vertical junction steel plate also is fixed with simultaneously on described bracket, both Between pass through 10.9 grades of M20 high-strength bolts（6）Connection；Two blocks of horizontal connection steel plates pass through M16 plain bolts（7）With described ox Leg connects.