Straw-steel system prefabricated house and construction method

Abstract

Straw-steel system prefabricated house and construction method. At present, steel structure prefabricated buildings are mainly steel frame structures, with beams and columns as the main load-bearing components, and most walls are non-load-bearing walls. The present invention comprises: a wall and a floor slab, wherein the floor slab is buckled on the wall, and the wall is a rectangular structure formed by four straw-steels. A group of connecting parts (11) are fixed on the left and right sides of the straw-steel of the wall, and the connecting parts on the left and right sides are staggered. Two adjacent straw-steels are connected by connecting parts. The connecting parts include a rectangular interface (4) with a square cross-section, a fixed steel plate (9) is arranged inside the rectangular interface, a spring (10) is welded to the lower part of the steel plate, a steel block (5) is welded to the lower part of the spring, and a groove (7) is provided on the upper part of the rectangular interface to match the steel block. The present invention is used for the assembly of straw-steel system houses.

Description

Technical field:

[0002] The invention relates to a building wall and node connection technology, in particular to a connection between nodes between straw board light steel structure assembled composite walls and between walls and floor slabs. Background technology:

[0004] The steel structure used in my country for a long time is a basic component made of steel plates, steel sections, etc., which is then transported to the construction site for installation and connection to form an overall structure. Therefore, in steel structures, connection occupies a very important position, and any steel structure will encounter connection problems. Weld connection is the main connection method for modern steel structures, but the mechanical properties of the weld change in the heat-affected zone, the material becomes brittle, and residual stress and residual deformation are inevitably generated. Once a crack occurs, it may spread rapidly throughout the cross-section, especially at low temperatures, it is prone to brittle cracking. Bolt connections require holes to be made for assembly and installation, which increases the workload and requires higher manufacturing precision. Rivet connections are labor-intensive and costly.

[0005] According to statistics, the average housing price in many large and medium-sized cities is over 10,000 yuan and is still rising. However, the real estate industry consumes a lot of resources and generates a lot of construction waste during the construction process.

[0006] At present, a lot of research has been conducted at home and abroad on the performance of wall connection nodes, such as compression resistance and earthquake resistance, and some specific theories and formulas have been derived, but the research results on composite nodes are still not comprehensive enough. The basis and advantage of energy-saving composite nodes and their promotion are their good stability performance, and the connection between wall nodes is relatively difficult, so it is necessary to choose a scientific node installation method that can not only ensure excellent wind and earthquake resistance, but also achieve the basic mechanical performance indicators required. Most of the prefabricated composite wall nodes currently used are based on welding, and the performance of welding needs to be improved. The current solution is to use welding-riveting, but this method must sacrifice strength as a prerequisite. The research and development of composite nodes that can be both load-bearing and stable is the current research direction.

[0007] At present, steel structure prefabricated buildings are mainly steel frame structures, with beams and columns as the main load-bearing components, and walls are mostly non-load-bearing walls. The invention of load-bearing prefabricated nodes can reduce the proportion of steel columns and improve the bearing and seismic resistance of the entire building. Therefore, it is necessary to develop a steel structure prefabricated composite node at this stage. Summary of the invention:

[0009] The purpose of the present invention is to provide a straw-steel system assembled house and a construction method.

[0010] The above purpose is achieved through the following technical solutions:

[0011] A straw-steel system assembled house, comprising: a wall and a floor, wherein the floor is buckled on the wall, the wall is a rectangular parallelepiped structure formed by four straw-steels, a group of connecting pieces are respectively fixed on the left and right sides of the straw-steels of the wall, and the connecting pieces on the left and right sides are staggered, and two adjacent straw-steels are butt-jointed through the connecting pieces;

[0012] The connecting piece comprises a rectangular interface with a square cross section, a fixed steel plate is arranged inside the rectangular interface, a spring is welded at the bottom of the steel plate, a steel block is welded at the bottom of the spring, and the upper part of the rectangular interface has a groove matching the steel block.

[0013] The straw-steel system prefabricated house has a straw-steel floor slab, a group of rectangular steel pipes are welded around the lower part of the floor slab, and a positioning groove facing the position of the rectangular steel pipe is arranged on the upper part of the wall.

[0014] The straw-steel system prefabricated house, the straw-steel is composed of straw boards and steel frames, the steel frame includes an external frame formed by C-shaped steels set around the straw boards, the front and rear sides of the external frame are respectively welded with cross-shaped steel plates composed of horizontal steel plates and vertical steel plates, the upper part of the cross-shaped steel plates is coated with wall plaster, the front and rear sides of the steel frame are respectively provided with fireproof layers, and the outside of the fireproof layers is provided with a waterproof layer.

[0015] In the straw-steel system prefabricated house, the distance between two adjacent vertical steel plates in the cross-shaped steel plates is one third of the width of the straw-steel.

[0016] In the straw-steel system prefabricated house, there are three rectangular steel pipes on each side of the lower part of the floor, and the distance between two adjacent rectangular steel pipes is equal to one-fourth of the side length of the floor.

[0017] The straw-steel system assembled house has a slide rail on the rectangular interface and is welded securely on the fixed steel plate.

[0018] A construction method for a straw-steel system prefabricated house, the method comprising the following steps: a straw board is a fibrous material made of crop straw, a binder is added to form a mixture, and the mixture is compressed and formed by a mold, wherein the thickness of the straw board is equal to the width of the groove of the selected C-shaped steel;

[0019] The length of the light steel plates at the upper and lower ends of the wall is equal to the length of the wall. The length of the C-shaped steels at the left and right ends of the wide wall is equal to the height of the wall minus the width of the flanges of the C-shaped steels at the upper and lower ends and welded to each other. During processing, the C-shaped steel at the lower end is first put on the lower end of the straw board, and then the C-shaped steels on both sides are installed and installed on both sides of the straw board by welding. The C-shaped steels on both sides are higher than the straw board by a certain length to facilitate the installation of the floor slab. Finally, the C-shaped steel at the top of the wall is welded to the C-shaped steels on both sides.

[0020] After the corresponding steel sections around the straw board are installed, the steel plates in the grid inside the frame are installed. The length of the two vertical steel plates in the grid is equal to the height of the wall minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and it should be perpendicular to the vertical steel plates.

[0021] After the installation of the cross steel frame is completed, the surface of the straw board needs to be plastered to make the straw board and the steel frame flush, and then a fireproof layer is applied on the surface of the steel and steel plate, and a waterproof layer is set outside the fireproof layer, and then plastering is performed on the wall;

[0022] After the C-shaped steel and the steel plate are installed, the interface between the walls is installed at the left and right ends of the wall. The steel plates around the interface are connected to each other by welding. The steel plates forming the interface should ensure that the width is equal, that is, the cross-section of the interface should be square, so as to ensure that the wall can be L-shaped connected. A rectangular slide rail is cut on one of the steel plates to facilitate the adjustment of the height of the internal connector of the interface by a handle. There is a four-sided pyramid-shaped groove at the top of the interface, and a steel plate that can be adjusted by a handle is provided under the groove. A spring is welded to the bottom of the steel plate, and a rectangular steel block with the same shape as the groove at the top of the steel plate is welded at the bottom of the spring. When connecting with another wall, the connector inside the interface can be lifted to the groove position at the upper part of the interface by the handle, so that the rectangular steel block at the lower part of the spring is completely retracted into the interface. When intersecting with the interface of the other wall, the handle is released so that the rectangular steel block at the lower part of the spring falls into the groove at the upper part of the interface of the other wall, completing the connection between the walls.

[0023] The straw-steel prefabricated floor is composed of straw board, C-shaped steel, steel plates forming a grid, and connectors under the floor. During processing, the C-shaped steel is also put around the straw board and welded to each other. This process requires cutting the flanges on both sides of the C-shaped steel. The length of the cut flange is equal to the height of the C-shaped steel section. Then, the steel plates of the grid inside the frame are installed. The length of the two vertical steel plates of the grid is equal to the height of the straw board inside the floor minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and is perpendicular to the vertical steel plates.

[0024] Finally, the floor slab and the wall are spliced ​​together. When splicing, the floor slab needs to be hoisted to the top of the four walls that have been spliced ​​together, and the rectangular steel pipe connectors on the lower flange of the C-shaped steel around the floor slab are respectively matched to the square holes reserved above the wall, and then slowly dropped to the top of the wall to complete the connection.

[0025] Beneficial effects:

[0026] 1. The C-shaped steel of the present invention is sleeved around the straw board and welded to each other, and the strip steel plate is welded to the flange of the C-shaped steel to form a tic-tac-toe support; the connection between the walls is formed by welding the steel plates to each other into a rectangular interface with a square cross-section, the top of the interface is provided with a quadrangular pyramid-shaped groove, and the middle is provided with a steel plate controlled by a handle, which is connected with a spring, and the lower end of the spring is connected with a quadrangular pyramid component. When the walls are connected to each other, the spring and the quadrangular pyramid component can be lifted by lifting the handle so that only the trapezoidal steel block is exposed under the connecting piece, and the trapezoidal steel block can be completely retracted into the interior of the interface by compressing the spring, so as to facilitate docking with the other wall.

[0027] The present invention welds the edges of the walls with steel plates to form a rectangular interface with a square cross-section, so that the walls can be butted against each other, and a spring is installed inside the interface for maintenance and removal. When the walls can be more firmly connected together, the overall performance of the structure is enhanced, and the problem of unstable connection between assembled walls is solved. At the wall connection, there is no need to overlap columns or other load-bearing structures, and the walls can be connected to each other, making the assembled form more convenient.

[0028] The C-shaped steels at the left and right ends of the wall of the present invention are higher than the internal straw board, leaving enough space for the rectangular hollow steel columns welded under the floor slab, so that the floor slab can be butt-jointed with the square cross-section interface at the top steel plate of the lower wall by hoisting.

[0029] When the wall and the floor slab of the present invention are connected together, the restraining effect between the components greatly improves the horizontal action resistance of the structure and enhances the overall stability of the structure. Description of the drawings:

[0031] Attached Figure 1 It is a schematic diagram of the materials used in the present invention and the wall construction method;

[0032] Attached Figure 2 This is a front view of the straw-steel assembled wall of the present invention;

[0033] Attached Figure 3 It is an overall schematic diagram of the straw-steel assembled wall of the present invention;

[0034] Attached Figure 4 It is a schematic diagram of the components of the wall interface of the present invention;

[0035] Attached Figure 5 It is a schematic diagram of the internal components of the wall interface of the present invention;

[0036] Attached Figure 6 This is a schematic diagram of the wall interface connection completion of the present invention;

[0037] Attached Figure 7 This is a schematic diagram of an L-shaped connection of a wall according to the present invention;

[0038] Attached Figure 8 This is a schematic diagram of the completion of the overall connection of the wall of the present invention;

[0039] Attached Fig. 9 is a top view of the straw-steel assembled floor slab of the present invention;

[0040] Attached Fig.10 is a schematic diagram of the bottom of the straw-steel assembled floor slab of the present invention;

[0041] Attached Fig.11 It is a schematic diagram of the connection between the wall and the floor slab of the present invention.

[0042] In the figure: 1. C-shaped steel; 2. Straw board; 3. Cross steel plate; 4. Rectangular interface; 5. Steel block; 6. Positioning groove; 7. Groove; 8. Slide rail; 9. Fixed steel plate; 10. Spring; 11. Connector; 12. Grip; 13. Rectangular steel pipe; 14. Wall plastering; 15. Fireproof layer; 16. Waterproof layer; 17. Steel frame. Specific implementation method:

[0044] Embodiment 1:

[0045] A straw-steel system assembled house, comprising: a wall and a floor, wherein the floor is buckled on the wall, the wall is a rectangular parallelepiped structure formed by four straw-steels, a group of connecting pieces 11 are respectively fixed on the left and right sides of the straw-steels of the wall, and the connecting pieces on the left and right sides are staggered, and two adjacent straw-steels are butt-jointed through the connecting pieces;

[0046] The connecting piece includes a rectangular interface 4 with a square cross-section, a fixed steel plate 9 is arranged inside the rectangular interface, a spring 10 is welded to the lower part of the steel plate, a steel block 5 is welded to the lower part of the spring, and the upper part of the rectangular interface has a groove 7 that matches the steel block.

[0047] Embodiment 2:

[0048] According to the straw-steel system prefabricated house described in Example 1, the floor is a straw-steel floor, a group of rectangular steel pipes 13 are welded around the lower part of the floor, and the upper part of the wall is provided with a positioning groove 6 that is opposite to the position of the rectangular steel pipe.

[0049] Embodiment 3:

[0050] According to the straw-steel system prefabricated house described in Example 1 or 2, the straw-steel is composed of a straw board 2 and a steel frame 17, the steel frame includes an external frame formed by a C-shaped steel 1 which is sleeved around the straw board, the front and rear sides of the external frame are respectively welded with a cross steel plate 3 composed of a horizontal steel plate and a vertical steel plate, the upper part of the cross steel plate is coated with wall plaster 14, the front and rear sides of the steel frame are respectively provided with a fireproof layer 15, and the outside of the fireproof layer is provided with a waterproof layer 16.

[0051] Embodiment 4:

[0052] According to the straw-steel system prefabricated house described in Example 1, 2 or 3, the distance between two adjacent vertical steel plates in the cross steel plate is one third of the width of the straw-steel.

[0053] Embodiment 5:

[0054] According to the straw-steel system prefabricated house described in Example 1, 2, 3 or 4, there are three rectangular steel pipes on each side of the lower part of the floor slab, and the distance between two adjacent rectangular steel pipes is equal to one quarter of the side length of the floor slab.

[0055] Embodiment 6:

[0056] According to the straw-steel system prefabricated house described in Example 1, 2, 3, 4 or 5, a slide rail 8 is provided on the rectangular interface, and a grip 12 is welded on the fixed steel plate.

[0057] Embodiment 7:

[0058] A construction method for a straw-steel system prefabricated house, the method comprising the following steps: a straw board is a fibrous material made of crop straw, a binder is added to form a mixture, and the mixture is compressed and formed by a mold, wherein the thickness of the straw board is equal to the width of the groove of the selected C-shaped steel;

[0059] The length of the light steel plates at the upper and lower ends of the wall is equal to the length of the wall. The length of the C-shaped steels at the left and right ends of the wide wall is equal to the height of the wall minus the width of the flanges of the C-shaped steels at the upper and lower ends and welded to each other. During processing, the C-shaped steel at the lower end is first put on the lower end of the straw board, and then the C-shaped steels on both sides are installed and installed on both sides of the straw board by welding. The C-shaped steels on both sides are higher than the straw board by a certain length to facilitate the installation of the floor slab. Finally, the C-shaped steel at the top of the wall is welded to the C-shaped steels on both sides.

[0060] After the corresponding steel sections around the straw board are installed, the steel plates in the grid inside the frame are installed. The length of the two vertical steel plates in the grid is equal to the height of the wall minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and it should be perpendicular to the vertical steel plates.

[0061] After the installation of the cross steel frame is completed, the surface of the straw board needs to be plastered to make the straw board and the steel frame flush, and then a fireproof layer is applied on the surface of the steel and steel plate, and a waterproof layer is set outside the fireproof layer, and then plastering is performed on the wall;

[0062] After the C-shaped steel and the steel plate are installed, the interface between the walls is installed at the left and right ends of the wall. The steel plates around the interface are connected to each other by welding. The steel plates forming the interface should ensure that the width is equal, that is, the cross-section of the interface should be square, so as to ensure that the wall can be L-shaped connected. A rectangular slide rail is cut on one of the steel plates to facilitate the adjustment of the height of the internal connector of the interface by a handle. There is a four-sided pyramid-shaped groove at the top of the interface, and a steel plate that can be adjusted by a handle is provided under the groove. A spring is welded to the bottom of the steel plate, and a rectangular steel block with the same shape as the groove at the top of the steel plate is welded at the bottom of the spring. When connecting with another wall, the connector inside the interface can be lifted to the groove position at the upper part of the interface by the handle, so that the rectangular steel block at the lower part of the spring is completely retracted into the interface. When intersecting with the interface of the other wall, the handle is released so that the rectangular steel block at the lower part of the spring falls into the groove at the upper part of the interface of the other wall, completing the connection between the walls.

[0063] The straw-steel prefabricated floor is composed of straw board, C-shaped steel, steel plates forming a grid, and connectors under the floor. During processing, the C-shaped steel is also put around the straw board and welded to each other. This process requires cutting the flanges on both sides of the C-shaped steel. The length of the cut flange is equal to the height of the C-shaped steel section. Then, the steel plates of the grid inside the frame are installed. The length of the two vertical steel plates of the grid is equal to the height of the straw board inside the floor minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and is perpendicular to the vertical steel plates.

[0064] Finally, the floor slab and the wall are spliced ​​together. When splicing, the floor slab needs to be hoisted to the top of the four walls that have been spliced ​​together, and the rectangular steel pipe connectors on the lower flange of the C-shaped steel around the floor slab are respectively matched to the square holes reserved above the wall, and then slowly dropped to the top of the wall to complete the connection.

Claims

1. A straw-steel system prefabricated house, comprising: The wall and floor are characterized in that: the floor is buckled on the wall, the wall is a rectangular structure surrounded by four straw-steels, a group of connecting pieces are fixed on the left and right sides of the straw-steels of the wall, and the connecting pieces on the left and right sides are staggered, and two adjacent straw-steels are butt-jointed through the connecting pieces; The connecting piece comprises a rectangular interface with a square cross section, a fixed steel plate is arranged inside the rectangular interface, a spring is welded at the lower part of the steel plate, a steel block is welded at the lower part of the spring, and a groove matching with the steel block is provided at the upper part of the rectangular interface; The lower end of the spring is connected to a quadrangular pyramid component. When connecting the walls, the spring and the quadrangular pyramid component can be lifted by lifting the handle so that only the trapezoidal steel block is exposed under the connecting piece. The trapezoidal steel block can be completely retracted into the interior of the interface by compressing the spring, so as to facilitate docking with the other wall. The floor slab is a straw-steel floor slab, a group of rectangular parallelepiped steel pipes are welded around the lower part of the floor slab, and a positioning groove facing the position of the rectangular parallelepiped steel pipe is arranged on the upper part of the wall; The straw-steel is composed of a straw board and a steel frame, wherein the steel frame comprises an external frame formed by C-shaped steel sleeved around the straw board, and the front and rear sides of the external frame are respectively welded with cross-shaped steel plates composed of horizontal steel plates and vertical steel plates, and the upper part of the cross-shaped steel plates is coated with wall plaster, and the front and rear sides of the steel frame are respectively provided with fireproof layers, and the outside of the fireproof layers is provided with a waterproof layer; The distance between two adjacent vertical steel plates in the cross-shaped steel plate is one third of the width of the straw-steel.

2. The straw-steel system prefabricated house according to claim 1 is characterized in that: There are three rectangular parallelepiped steel pipes on each side of the lower part of the floor slab, and the distance between two adjacent rectangular parallelepiped steel pipes is equal to one-fourth of the side length of the floor slab.

3. The straw-steel system prefabricated house according to claim 2 is characterized in that: The rectangular parallelepiped interface is provided with a slide rail, and the fixed steel plate is welded securely.

4. A construction method for a straw-steel system prefabricated house according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: a straw board is a fibrous material made of crop straw, a binder material is added to form a mixture, and the mixture is compressed and formed by a mold, wherein the thickness of the straw board is equal to the width of the selected C-shaped steel groove; The length of the light steel plates at the upper and lower ends of the wall is equal to the length of the wall. The length of the C-shaped steels at the left and right ends of the wide wall is equal to the height of the wall minus the width of the flanges of the C-shaped steels at the upper and lower ends and welded to each other. During processing, the C-shaped steel at the lower end is first put on the lower end of the straw board, and then the C-shaped steels on both sides are installed and installed on both sides of the straw board by welding. The C-shaped steels on both sides are higher than the straw board by a certain length to facilitate the installation of the floor slab. Finally, the C-shaped steel at the top of the wall is welded to the C-shaped steels on both sides. After the corresponding steel sections around the straw board are installed, the steel plates in the grid inside the frame are installed. The length of the two vertical steel plates in the grid is equal to the height of the wall minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and it should be perpendicular to the vertical steel plates. After the installation of the cross steel frame is completed, the surface of the straw board needs to be plastered to make the straw board and the steel frame flush, and then a fireproof layer is applied on the surface of the steel and steel plate, and a waterproof layer is set outside the fireproof layer, and then plastering is performed on the wall; After the C-shaped steel and the steel plate are installed, the interface between the walls is installed at the left and right ends of the wall. The steel plates around the interface are connected to each other by welding. The steel plates forming the interface should ensure that the width is equal, that is, the cross-section of the interface should be square, so as to ensure that the wall can be L-shaped connected. A rectangular slide rail is cut on one of the steel plates to facilitate the adjustment of the height of the internal connector of the interface by a handle. There is a four-sided pyramid-shaped groove at the top of the interface, and a steel plate that can be adjusted by a handle is provided under the groove. A spring is welded to the bottom of the steel plate, and a rectangular steel block with the same shape as the groove at the top of the steel plate is welded at the bottom of the spring. When connecting with another wall, the connector inside the interface can be lifted to the groove position at the upper part of the interface by the handle, so that the rectangular steel block at the lower part of the spring is completely retracted into the interface. When intersecting with the interface of the other wall, the handle is released so that the rectangular steel block at the lower part of the spring falls into the groove at the upper part of the interface of the other wall, completing the connection between the walls. The straw-steel prefabricated floor is composed of straw board, C-shaped steel, steel plates forming a grid, and connectors under the floor. During processing, the C-shaped steel is also put around the straw board and welded to each other. This process requires cutting the flanges on both sides of the C-shaped steel. The length of the cut flange is equal to the height of the C-shaped steel section. Then, the steel plates of the grid inside the frame are installed. The length of the two vertical steel plates of the grid is equal to the height of the straw board inside the floor minus the width of the upper and lower flanges of the C-shaped steel. The distance between the two steel plates is equal to 1 / 3 of the wall width. The horizontal steel plate needs to be cut and welded between the C-shaped steel or the two vertical steel plates, and is perpendicular to the vertical steel plates. Finally, the floor slab and the wall are spliced ​​together. When splicing, the floor slab needs to be hoisted to the top of the four walls that have been spliced ​​together, and the rectangular steel pipe connectors on the lower flange of the C-shaped steel around the floor slab are respectively matched to the square holes reserved above the wall, and then slowly dropped to the top of the wall to complete the connection.

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