CN103255903A - Workshop indoor steel plate concrete composite floor structure and manufacturing method thereof - Google Patents

Abstract

The invention discloses a steel plate concrete composite floor structure in a workshop, which comprises a base layer (7), which is located at the lowermost end, followed by a cushion layer (6), four corners of the steel plate surface layer (3) respectively have through holes, four There is a concrete foundation (1) under the corner, and the concrete foundation (1) is pre-embedded with steel bars (2), and the exposed ends of the steel bars (2) extend into the through holes of the steel plate surface layer (3), and the exposed ends of the steel bars (2) The steel plate surface (3) is welded, there is a deformation joint (8) at the connection between the steel plate surface (3) and the fine stone concrete surface (9), and there is a leveling layer ( 4) and the bonding layer (5), the leveling layer (4) is located on the bonding layer (5), and the bonding layer (5) is between the fine stone concrete surface layer (9) and the cushion layer (6); solve the local The ground with the second largest impact load adopts a whole steel plate ground or multiple thick steel plates for welding connection, which has problems such as high cost and bending deformation.

Description

Indoor steel plate concrete composite floor structure and its manufacturing method

technical field

The invention belongs to the building ground structure technology, in particular to a steel plate concrete composite ground structure in a workshop and a manufacturing method thereof.

Background technique

The indoor floor of the workshop is characterized by a large area and heavy loads. Different production processes and production sections have different requirements for ground strength, stiffness, impact resistance, vibration resistance, wear resistance, and rolling resistance. Therefore, in engineering construction, multi-type ground combination splicing is a common method. For the ground with multiple large impact loads locally, the whole steel plate ground or multiple thick steel plates are often used for welding and connection and fixed with expansion screws and the ground. However, due to the large number of thick steel plates used in this production method, the overall cost of the ground is relatively high, and under the action of multiple impact loads for a long time, the whole welded steel plate ground will produce a series of problems such as bending deformation and so on.

Contents of the invention

The technical problem to be solved by the present invention is to provide an indoor steel plate concrete composite ground structure and its manufacturing method, so as to solve the problem that the ground in the workshop has multiple large impact loads locally, because the whole steel plate ground, or multiple thick steel plates Welding the connection and fixing it to the ground with expansion screws has problems such as high cost and the fact that the entire welded steel plate ground will be bent and deformed under long-term repeated impact loads.

Technical scheme of the present invention:

A steel plate concrete composite ground structure in a workshop, which includes a cushion and a base, the base is located at the bottom, followed by a cushion, the four corners of the steel plate surface are respectively opened with through holes, and there are concrete foundations under the four corners, the concrete foundation is pre-prepared Embedded steel bars, the exposed end of the steel bar extends into the through hole of the steel plate surface, the exposed end of the steel bar is welded to the steel plate surface, there is a deformation joint at the connection between the steel plate surface and the fine stone concrete surface, and the gap between the steel plate surface and the cushion Between the leveling layer and the bonding layer, the leveling layer is located on the bonding layer, and the bonding layer is between the fine stone concrete surface layer and the cushion layer.

The exposed end of the steel bar protrudes into the through holes on the four corners of the steel plate surface layer for 50%-70% of the thickness of the steel plate surface layer.

The width of the deformation seam is 5-20mm, and the deformation seam is filled with deformable material.

The thickness of the steel plate surface layer is greater than 5mm.

The thickness of the leveling layer is greater than 20 mm.

The thickness of the cushion is greater than 60mm.

The manufacturing method of the steel plate concrete composite ground structure in the workshop includes the following steps:

Step 1. Determine the position of the foundation at the lower part of the four corners of the steel plate surface, make a concrete foundation, and pre-embed steel bars in the concrete foundation, and compact the foundation soil;

Step 2, construct and make the cushion layer, adopt concrete with a strength grade above C7.5, and the thickness of the cushion layer 6 must be greater than 60 mm;

Step 3, making a bonding layer, which is made of materials with a cement slurry to water-cement ratio of 0.4-0.5;

Step 4, making a leveling layer, using 1:2 dry concrete mortar;

Step 5. Lay the steel plate surface layer, lay the steel plate surface layer on the leveling layer, extend the exposed ends of the pre-embedded steel bars in the concrete foundation into the holes on the four corners of the steel plate surface layer, and then weld the steel bars to the steel plate surface layer Polishing;

Step 6, make fine stone concrete surface course, make thick 40 millimeters on cushion course, the fine stone concrete surface course that intensity is C20;

Step 7. Fill variable materials in the deformation joints between the steel plate surface layer and the fine stone concrete surface layer and between each steel plate surface layer.

Beneficial effects of the present invention:

The impact load on the steel plate surface layer of the present invention is evenly distributed to the concrete foundation under the steel plate, to a large extent, the uneven settlement is adjusted, and the flatness of the steel plate is guaranteed; the cushion layer adopts a strength grade of C7. 5. Concrete with a thickness greater than 60 mm strengthens the strength of the base layer and better bears the impact load of the upper part. According to the different loads, the present invention adopts the assembly process of fine stone concrete surface and steel plate surface, which effectively reduces the cost compared with the traditional method of using steel plate surface in a large area; the filling of deformation joints and deformation materials mainly solves the problem of The stress concentration that may be caused by temperature and shrinkage deformation, as well as the deformation caused by uneven load distribution on the upper part, compared with the prior art, the present invention not only effectively meets the requirements of different production processes and different production sections, but also the strength and rigidity. requirements, it solves the deformation problem caused by the use of a whole piece of welded steel plate floor under the action of a large impact load, the construction is simple, and the project cost is low; it solves the problem of the ground with multiple large impact loads in the workshop due to the use of the whole One steel plate floor, or multiple thick steel plates are welded and fixed to the ground with expansion screws. There are problems such as high cost and long-term repeated impact loads. The whole welded steel plate floor will produce bending deformation and other problems.

Description of drawings:

Fig. 1 is a schematic diagram of the plane structure of the present invention;

Fig. 2 is a schematic cross-sectional view at 1-1 of Fig. 1;

Fig. 3 is a schematic cross-sectional view at 2-2 in Fig. 1 .

Detailed ways:

A steel plate concrete composite floor structure in a workshop, which includes (see Figures 1, 2 and 3) a cushion layer 6 and a base layer 7, the base layer 7 is located at the bottom, followed by a cushion layer 6, the cushion layer is located on the base layer 7, and the steel plate surface layer There are through holes in the four corners of 3, and there is a concrete foundation 1 under the four corners of the steel plate surface layer 3, and the concrete foundation 1 is pre-embedded with steel bars 2, and the exposed ends of the steel bars 2 extend into the through holes in the four corners of the steel plate surface layer 3 Inside, the exposed end of the steel bar 2 is welded to the steel plate surface layer 3 and polished. There is a deformation joint 8 at the connection between the steel plate surface layer 3 and the fine stone concrete surface layer 9. There is a leveling layer 4 between the steel plate surface layer 3 and the cushion layer 6. And the bonding layer 5, the leveling layer 4 is located on the bonding layer 5, and the bonding layer 5 is between the fine stone concrete surface layer 9 and the cushion layer 6.

In order to ensure that the welding between the steel bar 2 and the steel plate surface layer 3 is firm, the exposed end of the steel bar 2 extends into the through holes on the four corners of the steel plate surface layer 3. The distance is 50%-70% of the thickness of the steel plate surface layer 3, and the remaining The hole space is filled evenly with welding materials, which can ensure that the steel plate surface layer is smooth and flat and that the steel plate surface layer 3 can be firmly on the ground.

The width of deformation joint 8 is 5-20 millimeters, and deformation joint 8 is filled with deformable material, and deformable material selects glass glue, and the setting of deformation joint is to ensure that between steel plate surface layer 3 and fine stone concrete surface layer 9 due to heat Expansion and contraction do not produce extrusion deformation, and the deformation joints are filled with deformable material glass glue, which can ensure that there is no gap between the surface layers and avoid extrusion deformation between the surface layers.

In order to ensure that the steel plate surface layer 3 can withstand ground impact loads, the thickness of the steel plate surface layer 3 is greater than 5 mm.

In order to disperse the impact load and ensure the strength of the entire ground, the thickness of the leveling layer 4 is greater than 20 mm, and the thickness of the cushion layer 6 is greater than 60 mm.

The manufacturing method of the steel plate concrete composite ground structure in the workshop adopts the following steps:

Step 1. Determine the position of the foundation at the lower part of the four corners of the steel plate surface layer 3, make the concrete foundation 1, and pre-embed the steel bar 2 in the concrete foundation 1, and then tamp the foundation soil;

Step 2, construct and make the cushion layer 6, adopt concrete whose strength grade is above C7.5, and the thickness of the cushion layer 6 must be greater than 60 mm;

Step 3, making the bonding layer 5, which is made of materials with a cement slurry to water-cement ratio of 0.4-0.5;

Step 4, making the leveling layer 4, which is made of dry concrete mortar with a ratio of 1 to 2-3; the thickness of the leveling layer 4 must be greater than 20 mm;

Step 5. Lay the steel plate surface layer 3, lay the steel plate surface layer 3 on the leveling layer 4, extend the exposed ends of the pre-embedded steel bars 2 in the concrete foundation 1 into the holes on the four corners of the steel plate surface layer 3, and then place the steel bars 2 After welding with the steel plate surface layer 3, it is polished, and the exposed end of the steel bar 2 extends into the through holes on the four corners of the steel plate surface layer 3. The distance is 50%-70% of the thickness of the steel plate surface layer 3, and the remaining through hole space is used The welding material is filled evenly, which can ensure that the ground of the steel plate surface is smooth and flat, and the steel plate surface 3 can be firmly fixed on the ground;

Step 6, making the fine stone concrete surface layer 9, and making a fine stone concrete surface layer 9 with a thickness of more than 40 mm and a strength of C20 on the cushion layer 6;

Step 7. Fill the deformation joints 8 between the steel plate surface 3 and the fine stone concrete surface 9 and between each steel plate surface 3 with variable material, and the deformable material is glass glue.

Claims (7)

1. workshop indoor steel plate concrete combined floor structure, it comprises bed course (6) and basic unit (7), basic unit (7) is positioned at bottom, secondly be bed course (6), it is characterized in that: (3) four angles of steel plate surface layer have through hole, concrete foundation (1) is arranged under four angles, concrete foundation (1) is embedded with reinforcing bar (2), the bared end of reinforcing bar (2) stretches in the through hole of steel plate surface layer (3), the bared end of reinforcing bar (2) and steel plate surface layer (3) welding, steel plate surface layer (3) has deformation joint (8) with pea gravel concreten surface layer (9) junction, be leveling layer (4) and setting course (5) between steel plate surface layer (3) and the bed course (6), leveling layer (4) is positioned on the setting course (5), is setting course (5) between pea gravel concreten surface layer (9) and the bed course (6).

2. a kind of workshop according to claim 1 indoor steel plate concrete combined floor structure is characterized in that: the distance that the bared end of reinforcing bar (2) stretches in the through hole on (3) four angles of steel plate surface layer is the 50%-70% of steel plate surface layer (3) thickness.

3. a kind of workshop according to claim 1 indoor steel plate concrete combined floor structure, it is characterized in that: the width of deformation joint (8) is the 5-20 millimeter, deformation joint (8) is filled with deformable material.

4. a kind of workshop according to claim 1 indoor steel plate concrete combined floor structure, it is characterized in that: the thickness of steel plate surface layer (3) is greater than 5 millimeters.

5. a kind of workshop according to claim 1 indoor steel plate concrete combined floor structure, it is characterized in that: the thickness of leveling layer (4) is greater than 20 millimeters.

6. a kind of workshop according to claim 1 indoor steel plate concrete combined floor structure, it is characterized in that: the thickness of bed course (6) is greater than 60 millimeters.

7. the preparation method of the indoor steel plate concrete in the described workshop of claim 1 combined floor structure, it comprises the steps:

Step 1, determine that (3) four bottoms, angle of steel plate surface layer arrange the position on basis, make concrete foundation (1), and in concrete foundation (1) embedded bar (2), foundation soil is tamped processing;

Bed course (6) is made in step 2, construction, adopts the concrete of strength grade more than C7.5, and the thickness of bed course 6 is greater than 60 millimeters;

Step 3, making setting course (5), adopting cement paste and water/binder ratio is the material making of 0.4-0.5;

Step 4, making leveling layer (4) adopt 1 to 2 dryness concrete mortar making;

Step 5, laying steel plate surface layer (3), lay steel plate surface layer (3) at leveling layer (4), the bared end of the interior embedded bar of concrete foundation (1) (2) is stretched in the hole on four angles of steel plate surface layer (3), then with reinforcing bar (2) and steel plate surface layer (3) welding back polishing;

Step 6, making pea gravel concreten surface layer (9) are done thick 40 millimeters at bed course (6), and intensity is the pea gravel concreten surface layer (9) of C20;

Step 7, fill changeable material between steel plate surface layer (3) and pea gravel concreten surface layer (9) and in the deformation joint (8) between each steel plate surface layer (3).

Images