CN105544721B - Light steel energy-saving assembled house and its construction method - Google Patents

Abstract

The invention relates to a light steel energy-saving assembled house and a construction method thereof. The light steel energy-saving assembled house includes floor slabs, roof panels, walls, doors and windows; the floor is a C-shaped steel sound-insulating floor; the C-shaped steel sound-insulating floor It includes a first steel structure frame, a backing layer fixed on the first steel structure frame, a wooden floor fixed on the backing layer, and a shock-absorbing pad between the backing layer and the wooden floor Sound insulation layer; the first steel structure frame is made of building C-shaped steel; the wall is a steel structure shear wall. The light-steel energy-saving prefabricated house of the present invention belongs to the house without foundation, and has the advantage that it can be constructed with suspended supports, the land below the house can be fully utilized, and rainwater can also be collected and recycled by building water tanks and pools; The thermal insulation and the hollow structure on both sides have good thermal insulation performance, and solve the cold bridge problem well, which can fully save the energy for cooling and heating of the house.

Description

Light steel energy-saving prefabricated house and construction method thereof

technical field

The invention relates to a building structure and a building method, in particular to a light steel energy-saving prefabricated house and a construction method thereof.

Background technique

Modern buildings are generally made of reinforced concrete, which is heavy. Although its seismic performance is rated very large, such as "resisting an earthquake of magnitude 8", "resisting an earthquake of magnitude 10", etc., in fact, the existing steel bars The anti-seismic performance of concrete buildings cannot really reach the nominal anti-seismic level. Because the earthquake is a process of continuously releasing the energy of the earth's core, and in the process of continuous shaking of the earth's crust, it is difficult for a heavy reinforced concrete building to withstand a huge transverse shear force, resulting in the loosening of the frame and wall structure. After the frame and wall structure are loose, it is difficult to support the huge weight of the building, which leads to the collapse of the building.

The seismic performance test of buildings is a one-time shock vibration test. This one-time shock vibration is completely different from the vibration form of the continuous vibration of the earth's crust caused by the earthquake. Therefore, although there are test data on the seismic performance, this data Often very inaccurate.

In addition, in steel structure buildings, the steel frame structure used usually uses welding to realize the interconnection of components, and this welding method will inevitably lead to oxidation reaction of the steel frame structure, thus shortening the The strength and service life of steel structure frames shorten the service life of steel structure buildings accordingly, which is also a major reason why the service life of existing steel structure buildings is generally not high.

Contents of the invention

One of the objectives of the present invention is to provide a light steel energy-saving prefabricated house to solve the problems of poor seismic performance and low service life of existing buildings.

The second object of the present invention is to provide a construction method of a light steel energy-saving prefabricated house, so as to optimize the construction technology of the steel structure building, improve the earthquake resistance, heat insulation and heat preservation performance of the steel structure building, and increase the service life of the house.

One of the objectives of the present invention is achieved in this way: a light steel energy-saving prefabricated house, including floor slabs, roof panels, walls and doors and windows;

The floor is a C-shaped steel sound-insulating floor; the C-shaped steel sound-insulating floor includes a first steel structure frame, a backing layer fixed on the first steel structure frame, a wooden floor fixed on the backing layer, and a pad on the The shock-absorbing and sound-insulating layer between the backing layer and the wooden floor; the first steel structure frame is made of building C-shaped steel;

The wall is a steel structure shear wall; the steel structure shear wall includes a second steel structure frame, an insulation layer filled in the second steel structure frame, and an insulation layer fixed on both sides of the second steel structure frame Wall panels; the second steel structure frame is composed of an upper beam frame, a lower beam frame, and a plurality of columns arranged between the upper beam frame and the lower beam frame to form a rectangular frame body including several rectangular vertical frames, In the at least two rectangular vertical frames in the steel structure frame, a support frame composed of two strut crosses is arranged; the upper beam frame, the lower beam frame and the column are all made of building C-shaped steel forming;

The building C-shaped steel is a steel with C-shaped cross-section rolled from galvanized steel plate. The shaped steel includes a bottom plate, a side plate and a corner back edge; the side plates protrude from both sides of the bottom plate in the same direction , and forms an included angle of 90° with the surface of the bottom plate; the folded corner is located at the end of the side plate and is parallel to the surface of the bottom plate.

The first steel structure frame is composed of two side beams arranged in parallel and several connecting beams arranged between the two side beams and perpendicular to the side beams; the side beams and The connecting beams are all made of building C-shaped steel; the connecting beams divide the plane between the two side beams into several juxtaposed rectangular frames, and at least two rectangular frames in the rectangular frames There is a support frame composed of two struts intersecting; the connecting beam frame is connected to the side beam frame by spot welding, and a U-shaped fastener is bridged on the side beam frame, and the U-shaped The fastener is fixedly connected with the end of the connecting beam by riveting or bolting.

The backing layer adopts Ozon board, and the shock-absorbing and sound-insulating layer adopts high-strength polystyrene board.

The upright column is connected with the upper beam frame and the lower beam frame by spot welding, and a U-shaped fastener is bridged between the upper beam frame and the lower beam frame, and the U-shaped fastener is connected to the lower beam frame. The ends of the columns are fixedly connected together by riveting or bolting.

A connecting frame is fixed on the second steel structure frame, and the wall panels are fixedly connected to the connecting frame.

The wallboard includes an outer decorative board and an inner rock wool insulation board, and an aluminum foil layer is attached to the surface of the rock wool insulation board.

The light steel energy-saving prefabricated house of the present invention uses C-shaped steel with a galvanized layer to make the steel structure frame, which has a compact structure and strong shear resistance, which can make the structure of the light steel energy-saving prefabricated house stable and firm, and greatly improve the seismic performance. Safe and reliable; the inner and outer walls can be replaced, and the entire wall does not use concrete, and no construction waste will be generated during the construction process and wall replacement process, which reduces the formation of construction waste and is environmentally friendly and energy-saving. Since the members of the steel structure frame are connected by spot welding and riveting bolts, the overall welding operation of the steel structure is avoided, and the galvanized layer on the surface of the building C-shaped steel will not be damaged, thus greatly improving the corrosion resistance of the steel structure frame. The overall life of light steel energy-saving prefabricated houses can be significantly improved.

The light-steel energy-saving prefabricated house of the present invention belongs to a house without a foundation, and has the advantage that it can be built with suspended supports, and the land under the house can be fully utilized, thereby saving land, and can also collect rainwater for recycling by building water tanks and pools. The three-layer insulation of the wall and the hollow structure on both sides have good thermal insulation and solve the cold bridge problem well, which can fully save the energy for cooling and heating of the house.

The second object of the present invention is achieved in this way: a method for constructing a light-steel energy-saving prefabricated house, comprising the following steps:

a. Production of C-shaped steel for construction: Roll C-shaped steel with galvanized steel plate to form a C-shaped steel in cross section. The sides protrude in the same direction and form a 90° angle with the surface of the bottom plate; the folded corner is located at the end of the side plate and is parallel to the surface of the bottom plate;

b. Production of the first steel structure frame: cut the C-shaped steel of the building into side beams and connecting beams, set the two side beams in parallel, and set several side beams between the two side beams The vertical connecting beam frame; the end of the connecting beam frame is connected to the side beam frame by spot welding, and then the U-shaped fastener is bridged on the side beam frame, and the U-shaped fastener and the end of the connecting beam frame are riveted or The way of bolting is fixedly connected together; the connecting beam frame divides the plane between the two side beam frames into a number of juxtaposed rectangular frames, and at least two of the rectangular frames are provided with crossings composed of two struts. Support frame; the two ends of the pole are clamped in the C-shaped notches of two adjacent connecting beams;

c. Production of the second steel structure frame: Cut the C-shaped steel of the building into upper beams, lower beams and columns, set the upper beams and lower beams up and down oppositely, and place them between the upper beams and the lower beams. A number of columns are arranged in between, and the ends of the columns are respectively connected with the upper beam and the lower beam through spot welding, and then U-shaped fasteners are respectively bridged on the upper beam and the lower beam, and the U-shaped fasteners are connected with the ends of the columns. The parts are fixedly connected together by riveting or bolting; the upright column divides the plane between the upper beam frame and the lower beam frame into several rectangular vertical frames, and there are two rectangular vertical frames on both sides of the second steel structure frame. A support frame composed of two struts crossed; the two ends of the struts are snapped into the C-shaped notches of two adjacent columns;

d. Construction of house frame: Lay the first steel structure frame on the ground, fix it on the ground or fix it on the pile foundation above the ground, and fix a second steel structure on each frame of the first steel structure frame frame, the connecting sides of each second steel structure frame are fixedly connected to each other, the upper edge of each second steel structure frame is kept at the same height, and another first steel structure frame is fixed on the upper edge of the second steel structure frame, thereby constructing form the frame of a one-story house;

e. Production of base floor slabs: Fix connecting frames or poles on the first steel structure frame of the lower layer of the house frame, fill each rectangular frame of the first steel structure frame of the lower layer with cement slag, and cover the backing layer On the top surface of the first steel structure frame of the lower layer, it is fixedly connected with the connecting frame or pole on the first steel structure frame of the lower layer; the shock-absorbing and sound-insulating layer is first laid on the backing layer, and then the wooden The floor can be made into a base floor;

f, the production of the wall: fill the insulation layer in each second steel structure frame of the house frame, respectively fix the connecting frame on both sides of the second steel structure frame, and fix the inner connecting frame on the inner side of each second steel structure frame. Wall panels are fixedly connected to the outer wall panels on the outer connecting frames of the second steel structure frames: the inner wall panels and the outer wall panels are composed of decorative panels and rock wool insulation panels, the decorative panels are on the outside, and the rock wool insulation panels are on the outside. Inside; a layer of aluminum foil is attached to the surface of the rock wool insulation board;

g. Production of roof panels: Fix the connecting frame or pole on the upper first steel structure frame of the house frame, fill the insulation layer in each rectangular frame of the upper first steel structure frame, and set the backing layer on the upper first The bottom surface of the steel structure frame is fixedly connected with the connecting frame or pole on the first steel structure frame of the upper layer; a shock-absorbing and sound-insulating layer and a decorative plate are arranged on the bottom surface of the backing layer to make a roof panel;

h. Installation of doors and windows: install door frames and doors at the reserved door of the wall, and install window frames and windows at the reserved window of the wall.

In step d of the above-mentioned construction method, after the building frame of a one-story house is built, step d is repeated on the first steel structure frame of the upper floor, so that a house frame with two or more floors can be built.

In the above construction method, a sloping roof is set on the top surface of the roof panel to increase the thermal insulation performance of the house.

The construction method of the light steel energy-saving prefabricated house of the present invention does not need on-site formwork pouring, does not generate construction waste, has a short construction period and low cost, reduces construction costs, and improves construction speed and work efficiency.

The steel structure frame in the present invention can be prefabricated in a factory without on-site manufacturing, which simplifies the construction process and is easy to control the quality. The invention improves the construction method of the steel structure house, improves the anti-seismic and thermal insulation performance of the steel structure house, and is beneficial to large-scale large-scale production. The invention improves the manufacturing process of the steel structure house, and improves the thermal insulation performance under the premise of ensuring the structural strength.

The present invention has the following advantages: 1. The structural form of the steel structure frame is adopted, the steel consumption per square meter is kept low, the dead weight of the house is light, and the load load of the floor to the wall can be greatly reduced. 2. It can realize large-scale mass production on the assembly line. The floor, wall and roof panels are prefabricated separately and assembled on site, which reduces logistics costs and is suitable for long-distance transportation. 3. Minimize the corrosion of steel, without affecting the service life of the plate within 100 years, so that the service life of light steel energy-saving prefabricated houses can be increased to more than 100 years.

Description of drawings

Fig. 1 is a structural schematic diagram of a light steel energy-saving prefabricated house of the present invention.

Fig. 2 is a schematic diagram of the structure of the wall.

Figure 3 is a schematic structural view of the floor.

Fig. 4 is a structural schematic diagram of building C-shaped steel.

Fig. 5 is a schematic structural diagram of a U-shaped fastener.

In the figure: 1. Sectional steel, 2. The first steel structure frame, 3. Bottom plate, 4. Side plate, 5. Corner return edge, 6. Connection hole, 7. Second steel structure frame, 8. Insulation layer, 9. Decorative board, 10. Rock wool insulation board, 11. Aluminum foil layer, 12. U-shaped fastener, 13. Connecting frame, 14. Floor plate, 15. Roof plate, 16. Wall body, 17. Slope roof, 21. Edge beam Frame, 22, connecting beam frame, 23, sound insulation insulation board, 71, upper beam frame, 72, lower beam frame, 73, column, 74, pole.

detailed description

Example 1:

As shown in Figure 1, the light steel energy-saving prefabricated house of the present invention includes floor slabs 14, roof panels 15, walls 16, doors and windows and other parts; The floor slabs between floors; Roof panel 15 is the top slab covering the top floor of the house.

As shown in Figure 2, the floor slab 14 is a C-shaped steel sound-insulating floor, that is, with the first steel structure frame 2 as the skeleton, a backing plate layer is fixed on the top surface of the first steel structure frame 2, and a backing plate layer is fixed on the backing plate layer. The wooden floor is lined with a shock-absorbing and sound-insulating layer between the backing layer and the wooden floor. The backing layer is made of Ozon board, and the shock-absorbing and sound-insulating layer is made of high-strength polystyrene board.

Ozon board is made of small-diameter wood, thinned wood, and wood core. It is processed into 0.3-0.7 mm thick flakes by special equipment, and then processed by deoiling, drying, sizing, directional paving, and hot-pressing. An oriented structural sheet. The surface slices are arranged vertically, and the core slices are arranged horizontally. This criss-cross arrangement reorganizes the wood texture structure, eliminates the influence of wood internal stress on processing, and makes it have better processability and moisture resistance. sex.

The first steel structure frame 2 is composed of two side beams 21 arranged in parallel and several connecting beams 22 arranged between the two side beams and perpendicular to the side beams. Two connecting beams 22 at the ends and two side beams 21 form a rectangular frame body; several connecting beams 22 in the middle divide the rectangular frame body into several juxtaposed rectangular frames. The frame is provided with a support frame composed of two struts 74 intersecting each other.

Both the edge beam frame 21 and the connecting beam frame 22 in the first steel structure frame 2 are made of building C-shaped steel.

Construction C-shaped steel is a steel with a C-shaped cross-section rolled from galvanized steel sheets. As shown in FIG. 4 , the section steel 1 includes a bottom plate 3 , a side plate 4 and a corner return edge 5 . The side plates 4 protrude from both sides of the base plate 3 in the same direction, and have equal protrusion heights, and form an included angle of 90° with the surface of the base plate 3 . The corner back edge 5 is located at the end of the side plate 4 and is parallel to the surface of the bottom plate 3 . It is advisable that the width of the knuckle back along the 5 is 10-20% of the base plate width. The knuckles on the two side plates 4 are bent and formed opposite to each other along 5, so that the cross section of the section steel 1 becomes C-shaped. The torsional strength of the building C-shaped steel is greatly improved by adding two corner return edges to the building C-shaped steel. On the side plate 4 of the section steel 1, there are connecting holes 6 through which the bolt rods are pierced. When constructing the steel structure frame, these connecting holes can be fixedly connected with other steel members by riveting or bolting, thus The overall welding connection between the components of the steel structure frame is avoided, the galvanized layer 2 on the surface of the section steel 1 is protected, and the construction of the steel structure frame is easy to operate and the work efficiency is improved.

The construction process of the first steel structure frame 2 is to connect the two ends of the connecting beam frame 22 with the side beam frame 21 by spot welding respectively, and then bridge the U-shaped fastener 12 on the outside of the side beam frame 21 (Fig. 3) On the two extending arms of the U-shaped fastener 12, there are piercing holes with opposite openings. After the U-shaped fastener 12 crosses the side beam frame 21, it is riveted with the end of the connecting beam frame 22 Or the way of bolting can make the connecting beam frame 22 and the side beam frame 21 fixedly connected together. This fixed connection method avoids overall welding deformation and damage to the surface galvanized layer.

Strut 74 can be a square tube or C-shaped steel, and its width is not greater than 1/2 of the C-shaped notch width of connecting beam frame 22, like this, when two struts intersect to form bracing frame, the two ends of strut 74 are equal to each other. It can be clamped in the C-shaped slots of two adjacent connecting beams 22 . The overlapping parts of the two struts 74 can be fixed by various methods such as spot welding, riveting or bolting, so that a firm and stable steel structure frame can be constructed.

For the first steel frame 2 with a large span, several support frames can also be added in other rectangular frames to improve the structural strength of the steel frame.

A connecting frame 13 is fixed on the first steel structure frame 2 , so that the base layer is fixed on the top surface of the first steel structure frame 2 through the connection with the connecting frame 13 .

As shown in Figure 3, the wall body 16 is a steel structure shear wall, and the steel structure shear wall includes a second steel structure frame 7, an insulation layer 8 filled in the second steel structure frame and fixed on the second steel structure frame. Steel frame 7 wall panels on both sides. The wallboard includes an outer decorative board 9 and an inner rock wool insulation board 10. A layer of aluminum foil 11 can be attached to the surface of the rock wool insulation board 10 to further improve the thermal insulation effect of the wall.

The second steel structure frame 7 is composed of an upper beam frame 71, a lower beam frame 72 and two side columns 73 to form a rectangular frame body, and several columns 73 in the middle are arranged between the upper beam frame 71 and the lower beam frame 72 , and divide the rectangular frame body into several juxtaposed rectangular vertical frames. In the two rectangular vertical frames on both sides of the second steel structure frame 7, a support frame composed of two struts 74 obliquely intersecting is provided. The junction of the lower beams.

The upper beam frame 71, the lower beam frame 72 and the column 73 are all formed by using the construction C-shaped steel shown in Fig. 4 .

The construction process of the second steel structure frame 7 is to connect the two ends of the column 73 with the upper beam frame 71 and the lower beam frame 72 by spot welding, and then span the outer sides of the upper beam frame 71 and the lower beam frame 72. Connect the U-shaped fastener 12 (Fig. 3), on the two extending arms of the U-shaped fastener 12, there are piercing holes with opposite openings, and the U-shaped fastener 12 crosses the upper beam frame 71 or the lower beam frame After 72, it is fixedly connected with the end of the column 73 by riveting or bolting, so that the column 73 is fixedly connected with the upper beam frame 71 or the lower beam frame 72. This fixed connection method avoids welding deformation caused by overall welding and damage to the surface galvanized layer.

The pole 74 can be a square tube or a C-shaped steel, and its width is not greater than 1/2 of the width of the C-shaped notch of the column 73. Like this, when two poles intersect to form a cross support frame, both ends of the pole can be clamped. Be connected in the C-shaped notches of two adjacent columns 73. The intersection and overlap of the two poles 74 can be fixed in various ways such as spot welding, riveting or bolting, so that a firm, stable and shear-resistant steel frame can be constructed. For the longer second steel structure frame 7, several bracing frames can also be added in other rectangular vertical frames to improve the strength of the steel structure frame.

In Fig. 1, a connecting frame 13 is fixed on the second steel structure frame 7, and the wall panels are fixedly connected to the connecting frame 13 by fasteners, thereby forming a steel structure shear without reinforced concrete and having good earthquake resistance and thermal insulation. force wall.

Example 2:

The construction method of the light steel energy-saving prefabricated house of the present invention comprises the following steps:

1. Production of C-shaped steel for construction: rolling C-shaped steel with galvanized steel sheet (Fig. 4) to form a C-shaped steel 1 with a cross-section. The side plates 4 protrude from both sides of the base plate 3 in the same direction, and form an angle of 90° with the surface of the base plate 3;

2. The production of the first steel structure frame 2: as shown in Figure 2, the C-shaped steel of the building is cut into side beam frames 21 and connecting beam frames 22, and the two side beam frames 21 are arranged in parallel. A number of connecting beams 22 perpendicular to the side beams are arranged between the beams 21; the ends of the connecting beams 22 are connected to the side beams 21 by spot welding, and then U-shaped fasteners are bridged on the side beams 21 12. The U-shaped fastener 12 and the end of the connecting beam 22 are fixedly connected together by riveting or bolting; the connecting beam 22 divides the plane between the two side beams 21 into several juxtaposed rectangular frames , in which at least two rectangular frames are provided with a support frame composed of two struts 74 intersecting;

3. The production of the second steel structure frame 7: as shown in Figure 3, the C-shaped steel of the building is cut into the upper beam frame 71, the lower beam frame 72 and the column 73, and the upper beam frame 71 and the lower beam frame 72 are up and down Relatively set, a number of columns 73 are set between the upper beam frame 71 and the lower beam frame 72, and the ends of the column 73 are connected with the upper beam frame 71 and the lower beam frame 72 by spot welding, and then the upper beam frame 71 and the lower beam frame are connected. The U-shaped fasteners 12 are respectively spanned on the beam frame 72, and the ends of the U-shaped fasteners 12 and the columns 73 are fixedly connected together by riveting or bolting; the columns 73 connect the upper beam frame 71 and the lower beam frame 72 The plane of the plane is divided into several rectangular vertical frames, and a support frame composed of two struts 74 obliquely intersecting is arranged in the two rectangular vertical frames on both sides of the second steel structure frame 7; In the C-shaped notches of the two adjacent columns.

4. Construction of the house frame: lay the first steel structure frame 2 on the ground or fix it on the ground. The former can be made into a mobile house, and the latter can be made into a fixed house; 2. It is fixed on several pile foundations above the ground to form a "castle in the air" with a space at the bottom. A second steel structure frame 7 is respectively fixed on each frame of the first steel structure frame 2, and the interconnecting edges of each second steel structure frame 7 are fixedly connected to each other, and the upper edges of each second steel structure frame 7 maintain the same height, And another first steel structure frame 2 is fixed on the frame of the area enclosed by the second steel structure frame 7, so that a house frame of a one-storey house can be constructed.

After building the house frame of a one-story house, step 4 can be repeated above the first steel structure frame of the upper floor to build a house frame with two or more floors.

5. The production of the base floor slab: Fix the connecting frame 13 on the first steel structure frame 2 of the lower floor of the above-mentioned house frame, and fill each rectangular frame of the first steel structure frame 2 of the lower floor with cement and slag (for mobile houses or For suspended rooms, the bottom plate needs to be fixed on the first steel structure frame 2 of the lower floor before filling with cement and slag), the backing plate layer is laid on the top surface of the first steel structure frame 2 of the lower floor, and it is connected with the first steel structure frame 2 of the lower floor. The upper connecting frame 13 is fixedly connected together; the shock-absorbing and sound-insulating layer is first laid on the backing layer, and then the wooden floor is laid to make the base floor.

The manufacturing method of the floor slab between floors is basically the same as that of the base floor slab, except that the first steel structure frame 2 is not filled with cement and slag, but a sound insulation board 23 is added.

6. The making of the body of wall: Fill the insulation layer of rock wool or perlite in each second steel structure frame 7 of the above-mentioned house frame, fix the connecting frame 13 respectively on both sides of the second steel structure frame 7, The connecting frame 13 on the inside of the steel structure frame 7 is fixedly connected to the inner wall panel, and the connecting frame 13 on the outer side of each second steel structure frame 7 is fixedly connected to the outer wall panel: the inner wall panel and the outer wall panel are made of decorative panels 9 and rock The wool insulation board 10 is composite, the decorative board 9 is on the outside, and the rock wool insulation board 10 is on the inside; a layer of aluminum foil 11 is attached to the surface of the rock wool insulation board 10 . The insulation layer on the inner and outer wall panels plus the insulation layer in the frame can form a three-layer insulation layer structure on the wall, and there is no cold and heat bridge, so the thermal insulation performance is better than that of conventional steel structure houses and concrete pouring houses .

7. The production of roof panels: fix the connecting frame 13 on the first steel structure frame 2 of the uppermost layer of the house frame, fill the insulation layer in each rectangular frame of the first steel structure frame 2 on the upper floor, and set the backing layer On the bottom surface of the first steel structure frame 2 of the upper floor, it is fixedly connected with the connecting frame 13 on the first steel structure frame 2 of the upper floor; a shock-absorbing and sound-insulating layer and a decorative plate are arranged on the bottom surface of the backing plate layer, and the roof can be made. panel. A slope roof 17 (Fig. 1) can also be set on the top surface of the roof panel to increase the thermal insulation performance of the house.

8. Installation of doors and windows: install door frames and doors at the reserved doorways of the wall 16, and install window frames and windows at the reserved windows of the wall 16 to form the light steel energy-saving prefabricated house of the present invention.

Claims (3)

1. A construction method of a light steel energy-saving prefabricated house is characterized in that it comprises the following steps: a. Production of C-shaped steel for construction: Roll C-shaped steel with galvanized steel plate to form a C-shaped steel in cross section. The sides protrude in the same direction and form a 90° angle with the surface of the bottom plate; the folded corner is located at the end of the side plate and is parallel to the surface of the bottom plate; b. Production of the first steel structure frame: cut the C-shaped steel of the building into side beams and connecting beams, set the two side beams in parallel, and set several side beams between the two side beams The vertical connecting beam frame; the end of the connecting beam frame is connected to the side beam frame by spot welding, and then the U-shaped fastener is bridged on the side beam frame, and the U-shaped fastener and the end of the connecting beam frame are riveted or The way of bolting is fixedly connected together; the connecting beam frame divides the plane between the two side beam frames into a number of juxtaposed rectangular frames, and at least two of the rectangular frames are provided with crossings composed of two struts. Support frame; the two ends of the pole are clamped in the C-shaped notches of two adjacent connecting beams; c. Production of the second steel structure frame: Cut the C-shaped steel of the building into upper beams, lower beams and columns, set the upper beams and lower beams up and down oppositely, and place them between the upper beams and the lower beams. A number of columns are arranged in between, and the ends of the columns are respectively connected with the upper beam and the lower beam through spot welding, and then U-shaped fasteners are respectively bridged on the upper beam and the lower beam, and the U-shaped fasteners are connected with the ends of the columns. The parts are fixedly connected together by riveting or bolting; the upright column divides the plane between the upper beam frame and the lower beam frame into several rectangular vertical frames, and there are two rectangular vertical frames on both sides of the second steel structure frame. A support frame composed of two struts crossed; the two ends of the struts are snapped into the C-shaped notches of two adjacent columns; d. Construction of house frame: Lay the first steel structure frame on the ground, fix it on the ground or fix it on the pile foundation above the ground, and fix a second steel structure on each frame of the first steel structure frame frame, the connecting sides of each second steel structure frame are fixedly connected to each other, the upper edge of each second steel structure frame is kept at the same height, and another first steel structure frame is fixed on the upper edge of the second steel structure frame, thereby constructing form the frame of a one-story house; e. Production of base floor slabs: Fix connecting frames or poles on the first steel structure frame of the lower layer of the house frame, fill each rectangular frame of the first steel structure frame of the lower layer with cement slag, and cover the backing layer On the top surface of the first steel structure frame of the lower layer, it is fixedly connected with the connecting frame or pole on the first steel structure frame of the lower layer; the shock-absorbing and sound-insulating layer is first laid on the backing layer, and then the wooden The floor can be made into a base floor; f, the production of the wall: fill the insulation layer in each second steel structure frame of the house frame, respectively fix the connecting frame on both sides of the second steel structure frame, and fix the inner connecting frame on the inner side of each second steel structure frame. Wall panels are fixedly connected to the outer wall panels on the outer connecting frames of the second steel structure frames: the inner wall panels and the outer wall panels are composed of decorative panels and rock wool insulation panels, the decorative panels are on the outside, and the rock wool insulation panels are on the outside. Inside; a layer of aluminum foil is attached to the surface of the rock wool insulation board; g. Production of roof panels: Fix the connecting frame or pole on the upper first steel structure frame of the house frame, fill the insulation layer in each rectangular frame of the upper first steel structure frame, and set the backing layer on the upper first The bottom surface of the steel structure frame is fixedly connected with the connecting frame or pole on the first steel structure frame of the upper layer; a shock-absorbing and sound-insulating layer and a decorative plate are arranged on the bottom surface of the backing layer to make a roof panel; h. Installation of doors and windows: install door frames and doors at the reserved door of the wall, and install window frames and windows at the reserved window of the wall. 2. The construction method of the light steel energy-saving prefabricated house according to claim 1, characterized in that, in the step d, after the building frame of the one-story house is built, step d is repeated above the first steel structure frame of the upper floor, Can be built into two-story or more than two-story house frame. 3. The method for constructing a light-steel energy-saving prefabricated house according to claim 1 or 2, characterized in that a slope roof is set on the top surface of the roof panel.