Prefabricated demountable formwork building structure
By using prefabricated, formwork-free building structures, the walls, insulation, and decoration can be poured together in an integrated manner, which solves the problems of complex construction and high secondary decoration costs in existing technologies, and improves construction efficiency and structural strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN JIUDIAN ASSEMBLY DECORATION CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-14
AI Technical Summary
The existing house requires wall filling, insulation and decoration to be carried out in stages, which is complicated and the cost of secondary renovation is high.
The prefabricated, formwork-free building structure is adopted. Through the tie-bar assembly composed of exterior wall panels, interior wall panels and insulation layer, the wall, insulation and decoration are cast in an integrated manner. The exterior wall panels and interior wall panels serve as supporting components and do not need to be removed.
It simplified the construction process, shortened the construction period, reduced labor intensity and construction costs, improved construction efficiency, and enhanced the strength of concrete structures.
Smart Images
Figure CN224495508U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a prefabricated, formwork-free building structure, belonging to the field of prefabricated buildings. Background Technology
[0002] The existing construction method for houses primarily involves first erecting a reinforced concrete structure for the columns and floor slabs to form the overall framework of the building, then filling in the gaps and constructing the walls, followed by plumbing, electrical, insulation, and finishing work to create a habitable structure. Because the main columns and floor slabs of existing houses are formed by reinforced concrete casting, the conventional method involves pre-casting structural columns or installing steel columns around the perimeter to support the floor slabs and walls. This method often requires setting up formwork and pre-installing reinforcing mesh according to design requirements before casting, and the formwork requires various supports to fix its position, making the actual operation process cumbersome, time-consuming, and labor-intensive. Furthermore, after the columns and floor slabs are formed, the formwork needs to be completely removed, a process requiring significant manpower and resources. This repeated installation and dismantling results in a long construction period, high labor intensity, and potential installation hazards. The walls are constructed using brick filling, and after filling, plastering is required on the outside of the bricks, columns, and floor slabs before plumbing, electrical, insulation, and finishing work. Due to rising labor costs in recent years, the construction cost of traditional houses is high. Utility Model Content
[0003] The technical problem that this utility model aims to solve is that the existing house filling, insulation and decoration need to be carried out in stages, which is complicated and the cost of secondary decoration is high.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a prefabricated formwork-free building structure, including an outer wall, the outer wall including an outer wall panel, an inner wall panel, an insulation layer and a tie rod assembly, the outer wall panel and the inner wall panel are spaced apart by the tie rod assembly, the insulation layer is located in the middle of the gap between the outer wall panel and the inner wall panel, and concrete is poured into the gap between the insulation layer and the outer wall panel or the inner wall panel; the tie rod assembly includes a tie rod and a tie member, the tie member is a U-shaped structure and is spaced between the outer wall panel and the inner wall panel, the two ends of the tie member are respectively in contact with the inner wall of the opposite outer wall panel and the inner wall panel, the tie rod passes through the two side walls of the tie member, and the two ends pass through the gap between adjacent outer wall panels and the gap between inner wall panels, and the passing ends are fitted with nuts.
[0005] In the above structure, a C-shaped fixing keel is provided on the outer side of the tie member, and the outer end of the tie member is located in the opening of the fixing keel.
[0006] The above structure also includes a fastener, which is a T-shaped structure. The small end of the fastener has several barbs on its outer side that penetrate into the insulation layer, and the large end is in contact with the inner side of the outer wall panel or the inner wall panel.
[0007] The above structure also includes C-shaped steel, which is spaced apart on the outer side of the outer wall panel and the inner wall panel and is close to the outer wall of the outer wall panel and the inner wall panel respectively. Several connecting grooves are opened on the bottom surface of the C-shaped steel, so that the two ends of the tie rod pass through the corresponding side of the C-shaped steel respectively, and the protruding end is fitted with a U-shaped sleeve. The sleeve is locked on the outside of the C-shaped steel, and the sleeve can be connected to the outer wall of the C-shaped steel by turning the nut.
[0008] The above structure also includes T-shaped screws. The C-shaped steel is arranged in a crisscross pattern and is connected and fixed by the T-shaped screws. Nuts are provided at the ends of the tie rods that protrude from the C-shaped steel. A square boss is provided at the connection between the screw and the large end of the T-shaped screw, and the width of the square boss is adapted to the width of the connecting groove on the bottom surface of the C-shaped steel.
[0009] The above structure also includes a floor slab, which includes a steel mesh and supporting members. The steel mesh is connected to the steel cage or steel column on the side of the external wall, and an inner wall panel is laid below the steel mesh. The inner wall panels are connected and fixed by connecting strips with an inverted V-shape structure. The supporting members are inverted T-shaped structures and are spaced at the upper end of the inner wall panels. The vertical side of the supporting members is provided with a slot, and the steel bars of the steel mesh are locked in the slot.
[0010] Furthermore, the above structure also includes a jin-shaped strip, which includes a connecting plate and a fixing plate. The connecting plate has an inverted L-shaped cross-section, and the fixing plate has an inverted U-shaped cross-section. The fixing plate is located inside the connecting plate, and the lower end of the connecting plate is connected to the left end of the opening of the fixing plate. The upper bent edge of the connecting plate forms an installation groove with the outer wall of the fixing plate. The inner wall panels vertically arranged below the steel mesh are connected by the jin-shaped strip, and the two ends of the same inner wall panel are respectively inserted into the installation groove and the opening.
[0011] The aforementioned structure also includes an inner wall, which comprises inner wall panels, an insulation layer, and tie rods. The inner wall panels are spaced apart by the tie rods. The insulation layer is located in the middle of the gap between the inner wall panels and is covered with concrete on its outer side.
[0012] The above structure also includes a wall panel splicing strip. The outer end faces of the outer wall panels and inner wall panels are provided with strip grooves. The wall panel splicing strip is a hollow square tube structure with one side wall being a concave V-shaped structure. The outer walls on both sides of the V-shaped side wall are provided with locking strips. The locking strips are locked in the strip grooves on the end faces between adjacent outer wall panels and between adjacent inner wall panels. The tie rod passes through the wall panel splicing strip along the V-shaped side wall.
[0013] The above structure also includes a sealing strip and an installation component. The installation component has an F-shaped structure and is connected to the base layer by screws. The ends of the outer wall panel and the inner wall panel pass through the opening of the installation component. The sealing strip has a cross-shaped structure and its upper and lower ends are respectively inserted into the strip holes between adjacent outer wall panels or inner wall panels. The sealing strip has grooves on both sides of its middle section.
[0014] The beneficial effects of this utility model are as follows: This building integrates wall casting, insulation, interior and exterior decoration, and water and electricity systems with the structure, all of which are cast together in a single formwork. This facilitates practical operation and shortens the construction cycle. Furthermore, the tie rods maintain the spacing between the exterior and interior wall panels, and the insulation layer achieves thermal insulation. Concrete is then poured directly into the gap between the insulation layer and the exterior or interior wall panels. Since the columns are also located between the exterior and interior wall panels, their outer sides are also covered with exterior and interior wall panels. Therefore, the cast-in-place walls and the outer sides of the columns are both covered by these panels. The exterior and interior wall panels, acting as supporting components, do not need to be removed later and can be used for the finishing layer, significantly reducing labor intensity and construction time while improving efficiency. Simultaneously, after the concrete solidifies, the portion of the tie rods extending beyond the exterior and interior wall panels is cut off, leaving the remaining tie rods and tie rods integrally formed with the concrete. This maintains the spacing between the exterior and interior wall panels while also increasing the structural strength of the concrete. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model.
[0016] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point I.
[0017] Figure 3 This is a schematic diagram of the floor structure of this utility model.
[0018] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point II.
[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the exterior wall of this utility model.
[0020] Figure 6 This utility model Figure 5 Enlarged schematic diagram of the structure at point III.
[0021] Figure 7 This utility model Figure 5 Enlarged schematic diagram of the structure at point IV.
[0022] Figure 8 This is a schematic diagram of the structure of the interior wall of this utility model.
[0023] Figure 9 For the present utility model Figure 8 Schematic enlarged view of the structure at V in it.
[0024] Figure 10 Schematic view of the structure of the catty strip of the present utility model.
[0025] Figure 11 Schematic view of the structure of the support member of the present utility model.
[0026] Figure 12 Schematic view of the structure of the fixing member of the present utility model.
[0027] Figure 13 Schematic view of the structure of the connecting strip of the present utility model.
[0028] Figure 14 Schematic view of the structure after the tension member and the tension screw of the present utility model are welded.
[0029] Figure 15 Schematic view of the structure of the connecting member of the present utility model.
[0030] Figure 16 Schematic view of the structure of the T-shaped screw of the present utility model.
[0031] Figure 17 Schematic view of the structure of the wall panel splicing strip of the present utility model.
[0032] Figure 18 Another schematic view of the structure of the wall panel splicing strip of the present utility model.
[0033] Figure 19 Schematic view of the connection structure of the sealing strip of the present utility model.
[0034] Figure 20 For the present utility model Figure 3 Schematic enlarged view of the structure at VI in it.
[0035] The diagram is labeled as follows: 1 is the interior wall, 2 is the exterior wall, 21 is a metal strip, 211 is a connecting plate, 212 is a fixing plate, 213 is a mounting groove, 214 is a flange, 22 is an exterior wall panel, 23 is an insulation layer, 24 is a fastener, 241 is a disc, 242 is a barb, 25 is an interior wall panel, 26 is a connecting strip, 27 is an installation component, 28 is a sealing strip, 3 is a column, 4 is a steel column, 5 is a tie rod assembly, 51 is a tie rod, 52 is a nut, 53 is a... 54 is a clamping sleeve, 541 is a wall panel splicing strip, 55 is a clamping strip, 55 is a tie rod, 551 is a reinforcing rib, 552 is a through hole, 56 is a fixing keel, 6 is a connector, 61 is a connecting hole, 62 is a fixing hole, 7 is a T-shaped screw, 71 is a square boss, 8 is a C-shaped steel, 9 is a floor slab, 91 is a steel mesh, 92 is a support, 921 is a locking slot, 93 is a sound insulation pad, 94 is an installation strip, 10 is concrete, 11 is a corner bracket, and 12 is a reinforcing nail. Detailed Implementation
[0036] The present invention will be further described below with reference to the accompanying drawings.
[0037] like Figures 1 to 20As shown, the prefabricated, formwork-free building structure of this utility model includes an outer wall 2, which comprises an outer wall panel 22, an inner wall panel 25, an insulation layer 23, and a tie rod assembly 5. The outer wall panel 22 and the inner wall panel 25 are spaced apart by the tie rod assembly 5. The insulation layer 23 is disposed in the middle of the gap between the outer wall panel 22 and the inner wall panel 25, and concrete 10 is poured into the gap between the insulation layer 23 and the outer wall panel 22 or the inner wall panel 25. The tie assembly 5 includes a tie rod 51 and a tie member 55. The tie member 55 has a U-shaped structure and is spaced between the outer wall panel 22 and the inner wall panel 25. Both ends of the tie member 55 are in contact with the inner walls of the opposite outer wall panel 22 and inner wall panel 25, respectively. The tie rod 51 passes through the two side walls of the tie member 55, and both ends protrude along the gaps between adjacent outer wall panels 22 and inner wall panels 25, respectively, with nuts 52 fitted at the protruding ends. Those skilled in the art should understand that this structure maintains the outer wall panel 22 and inner wall panel 25 at intervals using the tie assembly 5. An insulation layer 23 is then placed in the middle of the gap between the outer wall panel 22 and inner wall panel 25, and concrete 10 is poured into the gap to form the outer wall 2. The insulation layer 23 provides thermal insulation for the outer wall 2. Since the outer wall 2 is an infill wall, fiber-reinforced concrete 10 is preferred to ensure structural strength. The outer wall panel 22 and inner wall panel 25 of this structure serve as supporting components for the concrete 10 and do not require removal later, greatly reducing labor intensity and construction cycle, and improving efficiency. The tie rod assembly 5 mainly includes tie rods 55 and tie screws 51. The tie rods 55 are U-shaped structures and are spaced between the outer wall panel 22 and the inner wall panel 25. The two ends of the tie rods 55 are respectively in contact with the inner walls of the opposite outer wall panel 22 and inner wall panel 25, which can maintain the spacing between the outer wall panel 22 and the inner wall panel 25, thereby ensuring a consistent wall thickness after pouring. The tie screws 51 pass through the two side walls of the tie rods 55. In practice, through holes 552 can be provided on the two side walls of the tie rods 55 to facilitate the insertion of the tie screws 51. At the same time, in order to increase the structural strength of the tie rods 55, several reinforcing ribs 551 are provided at intervals on the outer bottom side of the tie rods 55. The two ends of the tie rod 51 extend through the gaps between adjacent outer wall panels 22 and inner wall panels 25, respectively, and are fitted with nuts 52 at the protruding ends. Tightening the nuts 52 ensures that the end face of the nuts 52 is tightly against the outer side of the outer wall panel 22 or inner wall panel 25, thus fixing the spacing between the outer wall panel 22 and inner wall panel 25 and preventing the concrete 10 from bursting and leaking out during pouring. After the concrete 10 has solidified, the nuts 52 are removed and the portion of the tie rod 51 extending beyond the outer wall panel 22 and inner wall panel 25 is cut off. The remaining tie rod 51 and tie member 55 are integrally formed with the concrete 10, ensuring the spacing between the outer wall panel 22 and inner wall panel 25 while also increasing the structural strength of the concrete 10. Furthermore, the outer wall panels 22 and inner wall panels 25 should cover the structural columns 3 or steel columns 4, and the insulation layer 23 should be installed along the outer side of the structural columns 19 or steel columns 4 to facilitate one-time casting and ensure structural strength.Meanwhile, in order to ensure that the outer wall panel 22 and the inner wall panel 25 are tightly bonded to the poured concrete 10, several reinforcing nails 12 can be screwed into the outer wall panel 22 and the inner wall panel 25. After the pouring is completed, the ends of the reinforcing nails 12 that pass through the outer wall panel 22 and the inner wall panel 25 are inserted into the concrete 10, so that the outer wall panel 22 and the inner wall panel 25 are more tightly bonded. At the same time, it is preferable to provide a threaded structure on the side wall of the insertion end of the reinforcing nail 12 to increase the contact area with the concrete 10 and ensure that the connection is tight.
[0038] Preferably, in the above structure, a C-shaped fixing keel 56 is provided on the outer side of the tie member 55, and the outer end of the tie member 55 is located in the opening of the fixing keel 56. Those skilled in the art should understand that, to prevent the tie member 55 from rotating when the nut 52 is turned, this structure preferably provides a C-shaped fixing keel 56 on the outer side of the tie member 55. In practice, the fixing keel 56 is preferably vertically arranged, and can be fixed to the outer C-shaped steel 8 with screws. Furthermore, the outer end of the tie member 55 is located in the opening of the fixing keel 56, which limits the position of the tie member 55. In practice, it is preferable to weld the tie rod 51 to the tie member 52 to increase the structural strength of the tie member 52 and also prevent deformation of the tie member 55 from causing inconsistent spacing between the outer wall panel 22 and the inner wall panel 25.
[0039] Preferably, the above structure also includes a fastener 24, which is a T-shaped structure. The small end of the fastener 24 has several barbs 242 on its outer side and penetrates into the insulation layer 23, while the large end contacts and connects to the inner side of the outer wall panel 22 or the inner wall panel 25. Those skilled in the art should understand that, to facilitate ensuring the insulation layer is positioned in the middle of the outer wall panel 22 and the inner wall panel 25, this structure preferably also includes a T-shaped fastener. Specifically, the small end of the fastener penetrates into the insulation layer 23, while the large end contacts and connects to the inner side of the outer wall panel 22 or the inner wall panel 25. Since the fastener 24 is positioned on both sides of the insulation layer 23, the position of the insulation layer 23 is ensured. The barbs 242 on the outer side of the small end of the fastener 24 prevent it from falling off during concrete pouring 10. The central part of the fastener 24 is a disc 241, which increases the contact area with the side wall of the insulation layer 23, limits the insertion length of the fastener 24, ensures that the insulation layer 23 is located in the middle position, and thus ensures the pouring quality.
[0040] Preferably, the above structure also includes C-shaped steel 8, which is spaced apart on the outer side of the outer wall panel 22 and the inner wall panel 25, and is in close contact with the outer walls of the outer wall panel 22 and the inner wall panel 25, respectively. Several connecting grooves are formed on the bottom surface of the C-shaped steel 8, allowing the two ends of the tie rod 51 to pass through the corresponding sides of the C-shaped steel 8, with a U-shaped retainer 53 fitted onto the protruding end. The retainer 53 is secured to the outside of the C-shaped steel 8, and tightening the nut 52 connects the retainer 53 to the outer wall of the C-shaped steel 8. Those skilled in the art should understand that, in order to ensure the casting quality of the outer wall 2, it is actually preferable to space C-shaped steel 8 on the outer side of the outer wall panel 22 and the inner wall panel 25 to ensure the stability of the formwork structure, and the C-shaped steel 8 can be removed after casting and shaping. C-shaped steel beams 8 are tightly attached to the outer walls of the outer wall panel 22 and the inner wall panel 25, respectively, and adjacent C-shaped steel beams 8 are connected as a whole. At the corners of the outer wall panel 22 and the inner wall panel 25, additional C-shaped steel beams 8 should be added and welded in place to prevent expansion and deformation during concrete pouring. Several connecting grooves are provided on the bottom surface of the C-shaped steel beams 8, allowing the two ends of the tie rods 51 to pass through the corresponding sides of the C-shaped steel beams 8 along the connecting grooves. Tightening the nuts 52 at the protruding ends of the tie rods 51 is sufficient. The clamping sleeves 53 increase the structural strength when the C-shaped steel beams 8 and nuts 52 are fastened, preventing deformation of the C-shaped steel beams 8 that could cause inconsistent wall thickness.
[0041] Preferably, the above structure also includes T-shaped screws 7. The C-shaped steels 8 are arranged in a staggered manner and are connected and fixed by the T-shaped screws 7. Each end of the tie rod 51 that protrudes from the C-shaped steel 8 is provided with a nut 52. A square boss 71 is provided at the connection between the screw and the large end of the T-shaped screw 7, and the width of the square boss 71 is adapted to the width of the connecting groove on the bottom surface of the C-shaped steel 8. Those skilled in the art should understand that, in order to ensure the stability of the formwork structure, this device preferably uses C-shaped steels 8 arranged in a staggered manner and connected and fixed by T-shaped screws 7. More preferably, the vertically spaced C-shaped steels 8 are close to the outer wall of the outer wall panel 22 and the inner wall panel 25 respectively. In practice, the installation can be completed by inserting the T-shaped screws 7 into the connecting groove at the staggered point and screwing in the appropriate nuts 52. To facilitate the connection of the transverse C-shaped steel 8 at the corner, this structure connects the inner transverse C-shaped steel 8 into a whole through L-shaped corner brackets 11, while the outer transverse C-shaped steel 8 can be connected through connectors 6. The connectors 6 in this structure are preferably bent structures with an included angle of 135°, with fixing holes 62 spaced apart on one bent side and U-shaped connecting holes 61 on the other bent side. In practice, the outer transverse C-shaped steel 8 is connected through the fixing holes 62 under the action of fastening bolts, while the connecting holes 61 are connected and fixed by inserting fastening screws and screwing in nuts 52. To facilitate the fastening of the T-shaped screw 7, this structure preferably has a square boss 71 at the connection between the screw and the large end of the T-shaped screw 7, and the width of the square boss 71 is adapted to the width of the connecting groove 2 on the bottom surface of the C-shaped steel 8. In practice, the T-shaped screw 7 can be circumferentially fixed by inserting the square boss 71 into the connecting groove 2 of the C-shaped steel 8, avoiding the inconvenience of fastening caused by the secondary rotation of the T-shaped screw 7 when screwing in the nut 52 for fastening.
[0042] Preferably, the above structure also includes a floor slab 9, which includes a reinforcing mesh 91 and supporting members 92. The reinforcing mesh 91 is connected to the reinforcing cage or steel column 4 on the side of the column 3 of the outer wall 2, and an inner wall panel 25 is laid below the reinforcing mesh 91. The inner wall panels 25 are connected and fixed to each other by connecting strips 26 with an inverted V-shape structure. The supporting members 92 are inverted T-shaped structures and are spaced apart on the upper end of the inner wall panels 25. The vertical side of the supporting members 92 is provided with a locking slot 921, and the reinforcing bars of the reinforcing mesh 91 are locked in the locking slot 921. Those skilled in the art should understand that further setting a floor slab 9 on the outer wall 2 realizes the multi-story design of the building. Preferably, the floor slab 9 includes a reinforcing mesh 91 and supporting members 92. Specifically, the reinforcing mesh 91 is connected to the reinforcing cage or steel column 4 on the side of the column 3 of the outer wall 2 to keep the reinforcing mesh 91 connected and fixed. At the same time, the inner wall panel 25 is laid below the reinforcing mesh 91. The setting of the inner wall panel 25 facilitates the sealing of cement mortar when pouring concrete 10. Due to the large size of the floor slab 9, it requires the splicing of multiple inner wall panels 25. Adjacent inner wall panels 25 are actually connected and fixed using inverted V-shaped connecting strips 26. The bent edges of the connecting strips 26 are then connected to adjacent inner wall panels 25 on the same plane using screws to form a single unit. To facilitate the support of the reinforcing mesh 91, the support member 92 is preferably an inverted T-shaped structure, spaced apart on the upper end of the inner wall panel 25. The lower end of the support member 92 can be fixed to the inner wall panel 25 with screws. A locking slot 921 is provided on the vertical side of the support member 92, allowing the reinforcing bars of the reinforcing mesh 91 to be secured within the slot 921 and tied tightly with wire. This structural design effectively prevents the reinforcing mesh 91 from moving during pouring, thus avoiding any impact on the pouring quality. Simultaneously, to achieve vibration reduction and sound insulation for the floor slab 9, a sound insulation pad 93 can be laid on the upper section of the inner wall panel 25. The sound insulation pad 93 is fixed to the upper surface of the inner wall panel 25 using U-shaped mounting strips 94 and screws, and then the entire structure is poured into place.
[0043] Preferably, the above structure also includes a jin-shaped strip 21, which includes a connecting plate 211 and a fixing plate 212. The connecting plate 211 has an inverted L-shaped cross-section, and the fixing plate 212 has an inverted U-shaped cross-section. The fixing plate 212 is disposed inside the connecting plate 211, and the lower end of the connecting plate 211 is connected to the left end of the opening of the fixing plate 212. The upper bent edge of the connecting plate 211 forms an installation groove 213 with the outer wall of the fixing plate 212. The inner wall panel 25 vertically disposed below the steel mesh 91 is connected by the jin-shaped strip 21, and the two ends of the same inner wall panel 25 are respectively inserted into the installation groove 213 and the opening. Those skilled in the art should understand that, due to the large span of the floor slabs 9 in some rooms, it is actually necessary to increase the load-bearing capacity of the floor slabs 9 through structural beams. Therefore, protruding structural beams will be designed on the lower end of some floor slabs 9. Since the lower end of the floor slabs 9 is supported by the inner wall panels 25 for easy casting, in order to achieve integral casting of the structural beams and floor slabs 9, the inner wall panels 25 located at the structural beams need to be vertically installed. In this structure, it is preferable to use a tie rod 21 to achieve vertical connection of the inner wall panels 25 at the structural beams. This structure includes a connecting plate 211 and a fixing plate 212, and The connecting plate 211 has an inverted L-shaped cross-section, and the fixing plate 212 has an inverted U-shaped cross-section. The fixing plate 212 is located inside the connecting plate 211, and the lower end of the connecting plate 211 is connected to the left end of the opening of the fixing plate 212. This structure allows for an elastic connection between the connecting plate 211 and the fixing plate 212. This connection method allows for appropriate adjustment of the angle between the mounting groove 213 formed by the upper bent edge of the connecting plate 211 and the outer wall of the fixing plate 212 and the opening of the fixing plate 212, accommodating the installation of the inner wall panel 25 at uneven corners, and is convenient in actual use. To avoid burrs on the outer end of the upper bent edge of the connecting plate 211, ensuring installation safety and increasing the structural strength of the end, it is preferable to bend the outer end of the upper bent edge of the connecting plate 211 inward to form a flange 214, and the flange 214 should be close to the upper bent edge of the connecting plate 211. Similarly, the opening end of the fixing plate 212 can also be bent inward to form a flange. To ensure structural strength at the connection, this structure preferably uses a single bent plate as the connection point between the connecting plate 211 and the fixing plate 212. Alternatively, it can be formed by bending a single plate. Specifically, one of the inner wall panels 25 to be installed vertically is inserted into the mounting groove 213 formed by the bent edge of the connecting plate 211 and the outer wall of the fixing plate 212, while the other inner wall panel 25 is inserted into the opening of the fixing plate 212. This installation allows the two inner wall panels 25 to be vertically connected. The two ends of the same inner wall panel 25 can be fixed by engaging the mounting grooves 213 and openings in the corresponding bodies on different sides. The screw is used to connect and fix the screw 21 to the inner wall panel 25. Specifically, the screw is screwed along the bottom surface of the opening to connect and fix the end of the inner wall panel 25 inserted into the mounting groove. To avoid screw leakage, another screw passes through the fixing plate 212 on the cast side of the inner wall panel 25 and connects to the inner wall panel 25 inserted into the opening. The screw cannot pass through the other side wall of the fixing plate 212.Furthermore, the 21-shaped strip of this structure can also be used as the installation support structure for door and window openings throughout the building. To ensure the structural strength of the connection, the two ends of the same inner wall panel 25 are respectively inserted into the mounting groove 213 and the opening.
[0044] Preferably, the above structure also includes an inner wall 1, which includes inner wall panels 25, an insulation layer 23, and tie rods 5. The inner wall panels 25 are spaced apart by the tie rods 5. The insulation layer 23 is located in the middle of the gap between the inner wall panels 25, and is filled with concrete 10 on its outer side. Those skilled in the art should understand that, in order to facilitate the partitioning of each floor of the building, this structure also includes an inner wall 1, and the structure of the inner wall 1 is basically the same as that of the outer wall 2, except that the formwork on both sides of the inner wall 1 is made of inner wall panels 25. Furthermore, both the inner wall 1 and the outer wall 2 of this building are infill walls, and the existing support beams and columns are constructed using existing technologies. Preferably, the inner wall 1 includes inner wall panels 25, an insulation layer 23, and tie rods 5. The inner wall 1 maintains the spaced interval between the inner wall panels 25 on both sides through the tie rods 5. Similarly, the insulation layer 23 is located in the middle of the gap between the inner wall panels 25, and is filled with concrete 10 on its outer side.
[0045] Preferably, the above structure also includes a wall panel splicing strip 54. A strip groove is provided on the outer end face of the outer wall panel 22 and the inner wall panel 25. The wall panel splicing strip 54 is a hollow square tubular structure with one side wall being a concave V-shaped structure. A retaining strip 541 is provided on the outer wall of both sides of the V-shaped side wall. The retaining strip 541 is engaged in the strip groove on the end face between adjacent outer wall panels 22 and adjacent inner wall panels 25. The tie rod 51 passes through the wall panel splicing strip 54 along the V-shaped side wall. Those skilled in the art should understand that, in order to facilitate the connection between adjacent outer wall panels 22 or inner wall panels 25 where the tie rod 51 exits, this structure preferably has a strip groove on the outer end face of the outer wall panel 22 and the inner wall panel 25, and the connection is actually achieved through the wall panel splicing strip 54. The preferred wall panel splicing strip 54 is a hollow square tube structure with one side wall being a concave V-shaped structure. A retaining strip 541 is provided on the outer walls of both sides of the V-shaped side wall. The retaining strip 541 is engaged in the strip grooves on the end faces between adjacent outer wall panels 22 and adjacent inner wall panels 25. The tie rod 51 passes through the wall panel splicing strip 54 along the V-shaped side wall. To ensure the structural fixation of the outer wall panel 22, it is preferable that two retaining strips 541 are spaced apart on one side wall of the outer wall panel 22, with the retaining strip 541 near the V-shaped side wall engaging in the strip hole of the outer wall panel 22.
[0046] Preferably, the above structure further includes a sealing strip 28 and a mounting component 27. The mounting component 27 has an F-shaped structure and is connected to the base layer by screws. The ends of the outer wall panel 22 and the inner wall panel 25 pass through the opening of the mounting component 27. The sealing strip 28 has a cross-shaped structure, and its upper and lower ends are respectively inserted into the strip holes between adjacent outer wall panels 22 or inner wall panels 25. Grooves are provided on both sides of the middle part of the sealing strip 28. Those skilled in the art should understand that, in order to keep the lower ends of the outer wall panel 22 and the inner wall panel 25 fixed, this device preferably provides an F-shaped mounting component 27. Specifically, the mounting component 27 is connected to the base layer by screws, so that the opening of the mounting component 27 faces upward, and the lower ends of the outer wall panel 22 and the inner wall panel 25 pass through the opening of the mounting component 27. Meanwhile, to prevent concrete slurry from overflowing from the gaps between adjacent outer wall panels 22 and adjacent inner wall panels 25 during pouring, this structure preferably uses sealing strips 28 for sealing. Preferably, the sealing strips 28 are cross-shaped, with the upper and lower ends respectively inserted into the strip holes between adjacent outer wall panels 22 or inner wall panels 25. The sealing strips 28 also have grooves on both sides of the middle part, which facilitates the integral casting and increases the strength of the cast structure.
Claims
1. A prefabricated, formwork-free building structure, including an exterior wall (2), characterized in that: The outer wall (2) includes an outer wall panel (22), an inner wall panel (25), an insulation layer (23), and a tie rod assembly (5). The outer wall panel (22) and the inner wall panel (25) are spaced apart by the tie rod assembly (5). The insulation layer (23) is located in the middle of the gap between the outer wall panel (22) and the inner wall panel (25), and concrete (10) is poured into the gap between the insulation layer (23) and the outer wall panel (22) or the inner wall panel (25). The tie rod assembly (5) includes tie bolts. The rod (51) and the tie rod (55) are U-shaped and are spaced between the outer wall panel (22) and the inner wall panel (25). The two ends of the tie rod (55) are respectively in contact with the inner walls of the opposite outer wall panel (22) and the inner wall panel (25). The tie rod (51) passes through the two side walls of the tie rod (55) and the two ends pass through the gap between the adjacent outer wall panels (22) and the gap between the inner wall panels (25) respectively. The protruding ends are fitted with nuts (52).
2. The prefabricated, formwork-free building structure according to claim 1, characterized in that: The outer side of the pull member (55) is provided with a C-shaped fixing keel (56), and the outer end of the pull member (55) is located in the opening of the fixing keel (56).
3. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes a fastener (24), which is a T-shaped structure. The fastener (24) has several barbs (242) on the outer side of its small end, which penetrate into the insulation layer (23), and the large end is in contact with the inner side of the outer wall panel (22) or the inner wall panel (25).
4. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes C-shaped steel (8), which is spaced apart on the outside of the outer wall panel (22) and the inner wall panel (25) and is close to the outer wall of the outer wall panel (22) and the inner wall panel (25) respectively. Several connecting grooves are provided on the bottom surface of the C-shaped steel (8), so that the two ends of the tie rod (51) pass through the corresponding side of the C-shaped steel (8) respectively, and the protruding end is fitted with a U-shaped sleeve (53). The sleeve (53) is locked on the outside of the C-shaped steel (8). Tightening the nut (52) can connect the sleeve (53) to the outer wall of the C-shaped steel (8).
5. The prefabricated, formwork-free building structure according to claim 4, characterized in that: It also includes T-shaped screws (7), the C-shaped steel (8) is arranged in a crisscross pattern and is connected and fixed by T-shaped screws (7), and the pull screws (51) are provided with nuts (52) at the ends of the C-shaped steel (8); a square boss (71) is provided at the connection between the screw and the large end of the T-shaped screw (7), and the width of the square boss (71) is adapted to the width of the connecting groove on the bottom surface of the C-shaped steel (8).
6. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes a floor slab (9), which includes a steel mesh (91) and a support member (92). The steel mesh (91) is connected to the steel cage or steel column (4) on the side of the column (3) of the outer wall (2). An inner wall panel (25) is laid below the steel mesh (91). The inner wall panels (25) are connected and fixed by a connecting strip (26) with an inverted V-shaped structure. The support member (92) is an inverted T-shaped structure and is spaced at the upper end of the inner wall panel (25). A slot (921) is provided on the vertical side of the support member (92). The steel bars of the steel mesh (91) are locked in the slot (921).
7. The prefabricated, formwork-free building structure according to claim 6, characterized in that: It also includes a jin-shaped strip (21), which includes a connecting plate (211) and a fixing plate (212). The connecting plate (211) has an inverted L-shaped cross section, and the fixing plate (212) has an inverted U-shaped cross section. The fixing plate (212) is located inside the connecting plate (211), and the lower end of the connecting plate (211) is connected to the left end of the opening of the fixing plate (212). The upper bent edge of the connecting plate (211) forms an installation groove (213) with the outer wall of the fixing plate (212). The inner wall panel (25) vertically arranged below the steel mesh (91) is connected by the jin-shaped strip (21), and the two ends of the same inner wall panel (25) are respectively inserted into the installation groove (213) and the opening.
8. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes an inner wall (1), which includes an inner wall panel (25), an insulation layer (23) and a tie rod assembly (5). The inner wall panel (25) is spaced apart by the tie rod assembly (5). The insulation layer (23) is located in the middle of the gap between the inner wall panels (25) and is filled with concrete (10) on the outside.
9. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes a wall panel splicing strip (54), on the outer end face of the outer wall panel (22) and the inner wall panel (25) there is a strip groove. The wall panel splicing strip (54) is a hollow square tube structure, and one side wall is a concave V-shaped structure. The outer walls on both sides of the V-shaped side wall are provided with a locking strip (541). The locking strip (541) is locked in the strip groove on the end face between adjacent outer wall panels (22) and between adjacent inner wall panels (25). The tie rod (51) passes through the wall panel splicing strip (54) along the V-shaped side wall.
10. The prefabricated, formwork-free building structure according to claim 1, characterized in that: It also includes an installation component (27) and a sealing strip (28). The installation component (27) has an F-shaped structure and is connected to the base layer by screws. The ends of the outer wall panel (22) and the inner wall panel (25) are inserted into the opening of the installation component (27). The sealing strip (28) has a cross-shaped structure and its upper and lower ends are respectively inserted into the strip holes between adjacent outer wall panels (22) or inner wall panels (25). The sealing strip (28) has grooves on both sides of the middle part.