Thermal insulation and decoration integrated T-shaped steel concrete outer wall structure and assembly construction process

Abstract

The invention belongs to the technical field of constructional engineering, and particularly relates to a heat preservation and decoration integrated T-shaped steel concrete outer wall structure and an assembly construction technology. The outer wall structure comprises T-shaped steel, a heat preservation decorative plate, a vertical steel bar, a horizontal steel bar, a door and window module, an L-shaped connecting steel sheet, an anchoring steel bar and a long screw. A plurality of T-shaped steel, vertical steel bars and horizontal steel bars are welded to form steel frameworks of the concrete outer walls, the steel frameworks of the upper concrete outer wall and the lower concrete outer wall are connected through L-shaped connecting steel sheets, and the steel bars of the upper and lower or left and right adjacent steel frameworks of the concrete outer walls are connected through anchoring steel bars. The heat preservation decoration plates are fixedly connected with flanges of the T-shaped steel through long screws, the adjacent heat preservation decoration plates are connected together and serve as non-dismantling outer formworks, indoor formworks are erected on the inner side of the concrete outer wall steel framework, and concrete is poured between the non-dismantling outer formworks and the indoor formworks to form the heat preservation and decoration integrated T-shaped steel concrete outer wall. The steel framework is formed by welding the T-shaped steel, the vertical steel bars and the horizontal steel bars, the steel framework and the cast-in-place concrete form a whole, the stability and the bearing capacity are enhanced, and the industrialization characteristics of factory prefabrication, on-site assembly and post-pouring of commercial concrete are achieved in the whole construction process.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering, and specifically relates to a thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure and an assembly construction process. Background Art

[0002] With the rapid development of residential industrialization and building industrialization, construction is moving towards green energy saving, low cost and high quality. Compared with traditional cast-in-place buildings, prefabricated buildings stand out with their advantages such as high stability of steel components, light weight of structure and superior seismic performance. At the same time, they have a high level of industrialization, can be efficiently produced through industrialized production lines, and can be quickly installed and constructed. However, the existing prefabricated buildings still have certain limitations in terms of design refinement, component coordination and construction completion, resulting in many problems in the application of PC structure technology and engineering practice: for example, the volume and weight of prefabricated components are large, the controllability of installation errors is poor, the construction quality and structural seismic performance are poor, and it is difficult to apply to high-rise and irregular buildings. As a new type of building exterior wall, the integration of thermal insulation and decoration structures has significant advantages in improving building energy efficiency, reducing energy consumption, and enhancing the aesthetics of buildings. However, the optimization of construction technology is also the key to the research on the integration of thermal insulation and decoration structures. The current construction technology lacks integration, and the compatibility and synergy between different materials (insulation, decoration) and structural functions need to be further optimized. In addition, there is a lack of unified design standards and specifications, resulting in uneven construction quality and system performance.

[0003] Therefore, the present invention designs a T-shaped steel-concrete exterior wall structure and assembly construction process with integrated insulation and decoration, which combines the load-bearing components with the exterior wall formwork, first completes the integrated processing of the steel skeleton and the insulation layer, the decorative layer, and the door and window modules in the factory, and then transports them to the construction site for installation. The volume and weight of the prefabricated components are relatively small, which is convenient for transportation, hoisting and installation. The wall can be applied not only to the exterior walls of buildings, but also to household walls and indoor walls with requirements for temperature and humidity. The insulation material can reduce heat transfer and control indoor environmental conditions. The entire construction process of the wall is: prefabrication of the integrated steel skeleton in the factory → on-site assembly and connection → post-pouring of commercial concrete, which has industrial characteristics such as standardization, normalization, mechanization, automation, scale, and reproducibility. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a T-shaped steel-concrete exterior wall structure and an assembly construction process with integrated insulation and decoration.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure, characterized in that it comprises a T-shaped steel, a thermal insulation decorative panel, vertical steel bars, horizontal steel bars, a door and window module, an L-shaped connecting steel sheet, an anchoring steel bar and a long screw;

[0007] The T-steel comprises an opening web and flanges located on the sides of the opening web; a number of T-steels are welded with vertical steel bars and horizontal steel bars to form a steel skeleton of a concrete exterior wall, the steel skeleton is cut off at the door and window modules and fixedly connected to the steel frame of the door and window modules; the steel skeletons of the upper and lower concrete exterior walls are connected by L-shaped connecting steel sheets, and the vertical steel bars and horizontal steel bars of the upper, lower or left and right adjacent concrete exterior wall steel skeletons are connected by anchoring steel bars; the thermal insulation decorative panels are fixedly connected to the flanges of each T-steel by gluing and long screws, the long screws penetrate the flanges of the T-steel and reserve a certain length of the screw head, adjacent thermal insulation decorative panels are connected together and used as a non-disassembly exterior formwork, an indoor formwork is set up on the inner side of the concrete exterior wall steel skeleton, and concrete is poured between the non-disassembly exterior formwork and the indoor formwork to form an insulation and decorative integrated T-steel concrete exterior wall.

[0008] Furthermore, bolt holes are reserved on the open webs at the upper and lower ends of the T-shaped steel, and long screw heads are reserved on the flanges. The L-shaped connecting steel plates are mounted on the long screw heads at the ends of the T-shaped steel flanges of the upper and lower concrete exterior wall steel frames, and are connected to the open webs of the T-shaped steel of the upper and lower concrete exterior wall steel frames through connecting bolts. Two L-shaped connecting steel plates are arranged at each end of the T-shaped steel to achieve fixed connection between the L-shaped connecting steel plates and the T-shaped steels of the upper and lower concrete exterior wall steel frames.

[0009] Furthermore, the steel plate width and the bolt holes on one side of the L-shaped connecting steel sheet match the width of the T-shaped steel opening web and the reserved bolt holes at the end, and the bolt holes match the diameter of the connecting bolts; the steel plate width and the opening on the other side match the single-side width of the T-shaped steel flange and the diameter of the long screw head, respectively.

[0010] Furthermore, the open web of the T-shaped steel is in the form of an intermittent large opening, and the shape of the opening is rectangular or elliptical. The horizontal steel bars located on the flange side of the T-shaped steel are spot welded in the opening of the open web, and the horizontal steel bars located on the opposite side of the T-shaped steel flange are spot welded in the opening of the open web or the outer edge of the open web.

[0011] Furthermore, the vertical steel bars on the opposite side of the T-steel flange are spot welded to the inner or outer side of the horizontal steel bars; when the steel content of the concrete exterior wall is insufficient, vertical steel bars are arranged on the flange side of the T-steel and spot welded to the outer side of the horizontal steel bars; when the steel content of the concrete exterior wall is sufficient, no vertical steel bars are arranged on the flange side of the T-steel 1.

[0012] Furthermore, the anchoring steel bars are U-shaped bars or straight bars, which are welded to the concrete exterior wall steel skeleton or temporarily fixed and pulled out for binding connection during on-site installation.

[0013] Furthermore, a tongue and groove is arranged at the edge of the thermal insulation decorative plate, and adjacent thermal insulation decorative plates are connected by the tongue and groove.

[0014] An assembly construction process of a T-shaped steel-concrete exterior wall structure with integrated thermal insulation and decoration, characterized in that it comprises the following steps:

[0015] Step 1: reserve bolt holes at the upper and lower ends of the web of the T-shaped steel opening, reserve the installation position of the door and window module and position the T-shaped steel, weld horizontal steel bars on the T-shaped steel, and weld vertical steel bars on the horizontal steel bars to form the steel skeleton of the concrete exterior wall;

[0016] Step 2: Weld the steel skeleton to the steel frame of the door and window module and install the door and window structure;

[0017] Step 3: The thermal insulation decorative panel is fixed to the flange of the T-shaped steel by gluing and long screws. The long screws penetrate the flange of the T-shaped steel and reserve a certain length of the screw head. The long screws are anchored at the flanges of the upper and lower ends of the T-shaped steel to complete the prefabrication of the integrated steel frame in the factory.

[0018] Step 4: During on-site construction, the T-shaped steels of the upper and lower concrete exterior wall steel frames are butted, and then the L-shaped connecting steel sheets are mounted on the long screw heads at the ends of the upper and lower T-shaped steel flanges, and after being aligned with the bolt holes at the ends of the open webs, the L-shaped connecting steel sheets are fixedly connected to the upper and lower T-shaped steels by tightening the nuts with the connecting bolts;

[0019] Step 5: Align the vertical steel bars and horizontal steel bars of the upper and lower concrete exterior walls or the left and right concrete exterior walls, and connect them using the preset anchor steel bars;

[0020] Step 6. The insulation decorative panels of adjacent concrete exterior walls are connected by tongue and groove and used as the non-removable exterior formwork. The indoor formwork is set up, concrete is poured, and the indoor formwork is removed after curing to form an insulation and decorative integrated T-shaped steel-concrete exterior wall.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The T-shaped steel concrete exterior wall is based on a reinforced concrete structure. The T-shaped steel flange is located on the outside of the wall, and the inner side of the wall is a steel mesh that is convenient for connecting with the indoor wall and floor steel bars. The wall and floor concrete can be poured uniformly. The design can choose to disconnect at non-floor locations with less stress, and avoid locations with greater stress on the floor during on-site assembly and connection. In addition, considering the eccentric stress characteristics of the building's exterior wall, the asymmetric cross-section can enhance the exterior wall structure's ability to resist overturning, improve the stability and seismic performance of the structure, and the T-shaped steel concrete exterior wall can be applied to high-rise and super-high-rise shear wall building structures.

[0023] 2) T-shaped steel is welded from thin-walled steel plates. The large opening of the open web can reduce the amount of steel used, making it easier to arrange and adjust the steel bars during construction. After welding the horizontal and vertical steel bars, the flanges of the T-shaped steel can be kept in the same plane, making it easier to install the insulation decorative panels. Long screws are used to penetrate the flanges of the T-shaped steel and a certain length of screw head is reserved. After the internal concrete is poured, the concrete, T-shaped steel and steel bars can be bonded as a whole, significantly improving the collaborative working performance.

[0024] 3) The upper and lower steel frames are vertically connected through L-shaped connecting steel sheets and fixed with screws and bolts, while the steel bars of adjacent steel frames are connected through traditional anchoring steel bars. On-site assembly mainly solves the connection problem of steel components. This assembly connection combining T-shaped steel and steel bars can effectively ensure the connection strength and rigidity of the concrete exterior wall steel frame. The connection method does not use welding, the connection is reliable, the assembly is simple, and the construction efficiency can be significantly improved. Finally, the integral connection form of post-cast commercial concrete is adopted, the structural integrity is strong, and it is equivalent to a cast-in-place structure.

[0025] 4) T-shaped steel is used to replace the vertical steel bars of some concrete walls. During prefabrication in the factory, the number of T-shaped steels can be adjusted according to the installation requirements of the thermal insulation decorative panels, and the wall structure can be made more resistant to overturning by taking into account the eccentric stress characteristics of the building's exterior walls. The vertical steel bars can be omitted on the flange side of the T-shaped steel or spot-welded to the outside of the horizontal steel bars, which is conducive to flexible handling of the steel content of the exterior wall.

[0026] 5) The flange of the T-shaped steel is connected to the insulation decorative panel by gluing and long screws. The flange of the T-shaped steel wrapped by the insulation decorative panel and concrete and the T-shaped steel hole web located in the concrete can greatly improve the corrosion resistance and durability of the steel. In addition, the surface layer maintenance can be done well during the prefabrication of the insulation decorative panel in the factory, and the door and window modules are better in sealing and cold and hot bridge treatment, truly achieving the same life cycle of insulation, decoration, and structure, better resisting the erosion of the structure by environmental factors, and extending the service life of the structure to be maintenance-free for life.

[0027] 6) The steel frame of the door and window module and the steel skeleton of the shear wall can be installed and fixed in various ways. The T-shaped steel opening web can be used to replace the left and right steel plates of the steel frame, saving the use of connecting steel plates; a reinforcement structure is set on the top of the steel frame of the door and window module, such as hidden beams, reinforcing ribs and other reinforcement structures to ensure the large opening form of doors and windows, solving the problems of inconvenient openings on the wall of the shear wall structure and complex opening node design and processing.

[0028] 7) The thermal insulation and decoration integrated steel frame involved in the present invention is prefabricated in the factory, transported to the site for assembly and connection, and can be directly used as the external formwork for the building exterior wall concrete without disassembly. The outdoor scaffolding is eliminated during the construction and installation process, providing safety guarantees for the energy-saving construction of the exterior walls of high-rise buildings, which is beneficial to promoting the industrialization of housing and construction, and making the construction develop in the direction of green energy saving, low cost and high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a T-shaped steel concrete exterior wall of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the T-shaped steel of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the L-shaped connecting steel sheet of the present invention;

[0032] Among them: 1. T-shaped steel; 2. Insulation decorative panel; 3. Vertical steel bars; 4. Horizontal steel bars; 5. Door and window modules; 6. L-shaped connecting steel sheets; 7. Anchor steel bars; 8. Connecting bolts; 9. Long screws. DETAILED DESCRIPTION

[0033] Specific embodiments are given below in conjunction with the accompanying drawings. The specific embodiments are only used to introduce the technical solutions of the present invention in detail and are not intended to limit the protection scope of the present application.

[0034] See also Figure 1-3 The present invention provides a T-shaped steel concrete exterior wall structure with thermal insulation and decoration integration, including a T-shaped steel 1, a thermal insulation decorative panel 2, a vertical steel bar 3, a horizontal steel bar 4, a door and window module 5, an L-shaped connecting steel sheet 6, an anchoring steel bar 7, a connecting bolt 8 and a long screw 9;

[0035] The T-shaped steel 1 includes an open web and a flange located on the side of the open web, and the door and window module 5 includes a steel frame and a door and window structure; a number of T-shaped steels 1 are welded with vertical steel bars 3 and horizontal steel bars 4 to form a steel skeleton of the concrete exterior wall, and the steel skeleton is cut off at the door and window module 5 and fixedly connected to the steel frame of the door and window module 5; the vertical steel bars 3 and horizontal steel bars 4 of the upper, lower or left and right adjacent concrete exterior wall steel skeletons are connected by anchoring steel bars 7; the thermal insulation decorative panel 2 is fixedly connected to the flange of the T-shaped steel 1 by gluing and long screws 9, and the long screws 9 penetrate the flange of the T-shaped steel 1 so that the long screw head extends out of the flange, the thermal insulation decorative panels 2 between adjacent concrete exterior walls are connected by tongue and groove and used as a non-disassembly external formwork, an indoor formwork is set up on the inner side of the steel skeleton, and concrete is poured to form an integrated thermal insulation and decorative T-shaped steel concrete exterior wall.

[0036] The upper and lower ends of the T-shaped steel 1 have reserved bolt holes on the web and long screw heads on the flanges. After the T-shaped steels 1 of the upper and lower concrete exterior wall steel frames are butt-jointed, the L-shaped connecting steel sheets 6 are mounted on the long screw heads at the flange ends of the upper and lower T-shaped steels 1. After being aligned with the bolt holes at the ends of the web, the L-shaped connecting steel sheets 6 are fixedly connected to the upper and lower T-shaped steels 1 by tightening the nuts with the connecting bolts 8. An L-shaped connecting steel sheet 6 is respectively arranged on both sides of the ends of the T-shaped steel 1.

[0037] The steel plate width on one side of the L-shaped connecting steel sheet 6 and the bolt holes thereon respectively match the width of the open web and the reserved bolt holes at the end of the T-shaped steel 1, and the bolt holes match the diameter of the connecting bolts; the steel plate width and the opening on the other side match the single-side width of the T-shaped steel flange and the diameter of the long screw head respectively.

[0038] The open web of the T-shaped steel 1 is in the form of an intermittent large open hole, and the shape of the open hole is rectangular or elliptical. The horizontal steel bars 4 located on the flange side of the T-shaped steel 1 are spot welded in the open hole of the open web, and the horizontal steel bars 4 located on the opposite side of the flange of the T-shaped steel 1 are spot welded in the open hole of the open web or the outer edge of the open web; the vertical steel bars 3 located on the opposite side of the flange of the T-shaped steel 1 are spot welded to the inner side or outer side of the horizontal steel bars 4, and are staggered with the open web of the T-shaped steel 1; when the steel content of the concrete exterior wall is insufficient, the vertical steel bars 3 are arranged on the flange side of the T-shaped steel 1 and spot welded to the outer side of the horizontal steel bars 4 to increase the steel content; when the steel content of the concrete exterior wall is sufficient, the vertical steel bars 3 are not arranged on the flange side of the T-shaped steel 1.

[0039] The anchoring steel bars 8 can be made of U-shaped bars, straight bars, etc., welded to the concrete exterior wall steel frame or temporarily fixed and pulled out for on-site installation, and tied and connected with the vertical steel bars 3 and horizontal steel bars 4 of the upper and lower concrete exterior walls or the left and right concrete exterior walls.

[0040] The edges of the thermal insulation decorative panels 2 are provided with tongue and groove, and adjacent thermal insulation decorative panels 2 are connected by tongue and groove.

[0041] An assembly construction process of a thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure comprises the following steps:

[0042] Step 1: reserve bolt holes at the upper and lower ends of the web of the T-shaped steel 1, reserve the installation position of the door and window module 5 and position the T-shaped steel 1, weld the horizontal steel bars 4 on the T-shaped steel 1, and weld the vertical steel bars 3 on the horizontal steel bars 4 to form the steel skeleton of the concrete exterior wall;

[0043] Step 2: Weld the steel skeleton to the steel frame of the door and window module 5, and install the door and window structure of the door and window module 5;

[0044] Step 3: The thermal insulation decorative panel 2 is fixed to the flange of the T-shaped steel 1 by gluing and long screws 9. The long screws 9 penetrate the flange of the T-shaped steel 1 and reserve long screw heads on the flange. Long anchor screws are added at the flanges of the upper and lower ends of the T-shaped steel 1 to complete the prefabrication of the integrated steel frame in the factory.

[0045] Step 4: During on-site construction, the T-shaped steels 1 of the upper and lower concrete exterior wall steel frames are butt-jointed, and then the L-shaped connecting steel sheets 6 are mounted on the long screw heads at the flange ends of the upper and lower T-shaped steels 1, aligned with the bolt holes at the ends of the open webs, and the L-shaped connecting steel sheets 6 are fixedly connected to the upper and lower T-shaped steels 1 by tightening the nuts with the connecting bolts 8;

[0046] Step 5: Align the steel bars of the upper and lower concrete exterior wall steel frames or the left and right concrete exterior wall steel frames and connect them using the preset anchor steel bars 7;

[0047] Step 6: The insulation decorative panels 2 of the adjacent concrete exterior walls are connected by tongue and groove and used as the non-dismantling exterior formwork, the indoor formwork is set up, the concrete is poured, and the indoor formwork is removed after curing to form an insulation and decorative integrated T-shaped steel concrete exterior wall, and the construction is completed. The parts not described in the present invention are applicable to the prior art.

Claims

1. A T-shaped steel-concrete exterior wall structure with integrated thermal insulation and decoration, characterized in that: Including T-shaped steel, insulation decorative panels, vertical steel bars, horizontal steel bars, door and window modules, L-shaped connecting steel sheets, anchor steel bars and long screws; The T-steel comprises an opening web and flanges on the sides of the opening web; a number of T-steels are welded with vertical steel bars and horizontal steel bars to form a steel skeleton of a concrete exterior wall, the steel skeleton is cut off at the door and window modules and fixedly connected to the steel frame of the door and window modules; the steel skeletons of the upper and lower concrete exterior walls are connected by L-shaped connecting steel sheets, and the vertical and horizontal steel bars of the upper, lower or left and right adjacent concrete exterior wall steel skeletons are connected by anchoring steel bars; the thermal insulation decorative panels are fixedly connected to the flanges of each T-steel by gluing and long screws, the long screws penetrate the flanges of the T-steel and reserve a certain length of the screw head, adjacent thermal insulation decorative panels are connected together as a non-disassembly exterior formwork, an indoor formwork is set up on the inner side of the concrete exterior wall steel skeleton, and concrete is poured between the non-disassembly exterior formwork and the indoor formwork to form an insulation and decorative integrated T-steel concrete exterior wall.

2. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 1 is characterized in that: Bolt holes are reserved on the open webs at the upper and lower ends of the T-shaped steel, and long screw heads are reserved on the flanges. The L-shaped connecting steel sheets are mounted on the long screw heads at the ends of the T-shaped steel flanges of the upper and lower concrete exterior wall steel frames, and are connected to the open webs of the T-shaped steel of the upper and lower concrete exterior wall steel frames through connecting bolts. Two L-shaped connecting steel sheets are arranged at each end of the T-shaped steel to realize the fixed connection between the L-shaped connecting steel sheets and the T-shaped steel of the upper and lower concrete exterior wall steel frames.

3. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 2 is characterized in that: The steel plate width and the bolt holes on one side of the L-shaped connecting steel sheet match the width of the T-shaped steel opening web and the reserved bolt holes at the end, and the bolt holes match the diameter of the connecting bolts; the steel plate width and the opening on the other side match the single-side width of the T-shaped steel flange and the diameter of the long screw head.

4. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 1 is characterized in that: The T-shaped steel includes an open web in the form of an intermittent large open hole, the shape of the open hole is rectangular or elliptical, the horizontal steel bars located on the flange side of the T-shaped steel are spot welded in the hole of the open web, and the horizontal steel bars located on the opposite side of the T-shaped steel flange are spot welded in the hole of the open web or the outer edge of the open web.

5. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 4 is characterized in that: The vertical steel bars on the opposite side of the T-steel flange are spot welded to the inside or outside of the horizontal steel bars; when the steel content of the concrete exterior wall is insufficient, vertical steel bars are arranged on the flange side of the T-steel and spot welded to the outside of the horizontal steel bars; when the steel content of the concrete exterior wall is sufficient, no vertical steel bars are arranged on the flange side of the T-steel 1.

6. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 1, characterized in that: The anchoring steel bars are U-shaped bars or straight bars, which are welded to the concrete exterior wall steel skeleton or temporarily fixed and pulled out for binding connection during on-site installation.

7. The thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 1, characterized in that: The edges of the thermal insulation decorative panels are provided with tongue and groove, and adjacent thermal insulation decorative panels are connected by the tongue and groove.

8. An assembly construction process for the thermal insulation and decoration integrated T-shaped steel concrete exterior wall structure according to claim 1, characterized in that: The following steps are involved: Step 1: reserve bolt holes at the upper and lower ends of the web of the T-shaped steel opening, reserve the installation position of the door and window module and position the T-shaped steel, weld horizontal steel bars on the T-shaped steel, and weld vertical steel bars on the horizontal steel bars to form the steel skeleton of the concrete exterior wall; Step 2: Weld the steel skeleton to the steel frame of the door and window module and install the door and window structure; Step 3: The thermal insulation decorative panel is fixed to the flange of the T-shaped steel by gluing and long screws. The long screws penetrate the flange of the T-shaped steel and reserve a certain length of screw head on the flange. Long anchor screws are added at the flanges of the upper and lower ends of the T-shaped steel to complete the prefabrication of the integrated steel frame in the factory. Step 4: During on-site construction, the T-shaped steels of the upper and lower concrete exterior wall steel frames are butted, and then the L-shaped connecting steel sheets are mounted on the long screw heads at the ends of the upper and lower T-shaped steel flanges, and the L-shaped connecting steel sheets are fixedly connected to the upper and lower T-shaped steels by connecting the bolts and tightening the nuts at the ends of the web plates with the holes; Step 5: Align the steel bars of the upper and lower concrete exterior wall steel frames or the left and right concrete exterior wall steel frames and connect them using preset anchor steel bars; Step 6. The insulation decorative panels of adjacent concrete exterior walls are connected by tongue and groove and used as the non-removable exterior formwork. The indoor formwork is set up, concrete is poured, and the indoor formwork is removed after curing to form an insulation and decorative integrated T-shaped steel-concrete exterior wall.

Images