Fabricated sandwich thermal insulation composite wallboard structure system with ultra-low energy consumption

Abstract

The invention relates to the technical field of fabricated buildings, and discloses an ultra-low-energy-consumption fabricated sandwich heat-preservation composite wallboard structure system which comprises a plurality of prefabricated parts, and the prefabricated parts comprise linear wallboards, L-shaped wallboards, heat-preservation partition boards, heat-preservation bearing floors and large-span roof panels. A vertical bearing and outer enclosure system, a horizontal bearing system, an indoor space separation system and a roof capping system are formed respectively, all the prefabricated parts form an integrated structure through the two-way insertion connection nodes, and the two-way insertion connection nodes are arranged at component joints and lap joints and are composed of double-hole dumbbell-shaped base plates and bolts. The base plate is arranged in a right trapezoid reinforcing area on the edge of the prefabricated part, the bolt penetrates through the base plate and the reserved hole and applies pre-tightening force, and horizontal shearing force transmission and vertical displacement constraint are achieved; through the integrated structure bearing and heat preservation functions, rapid modular assembly can be achieved, the assembly efficiency is improved, and the problem that construction is tedious due to the fact that the structure and the heat preservation function are separated in a traditional structure is solved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to an ultra-low energy consumption prefabricated sandwich insulated composite wall panel structure system. Background Technology

[0002] With the continued growth in societal demand for carbon reduction technologies, improving the quality of green building development and promoting new green construction methods have become key tasks for the current construction industry. Promoting prefabricated green and low-energy building products with high integration rates, superior living quality, and low overall costs is now imperative. Precast concrete sandwich insulated wall panels combine structural load-bearing capacity and thermal insulation performance with high durability and fire resistance, thus becoming a development trend in concrete insulation components.

[0003] However, the application of precast concrete sandwich insulated wall panels in buildings is often limited to non-structural components, failing to fully utilize their structural load-bearing performance advantages. Furthermore, the heavy weight of precast concrete sandwich insulated wall panels and insufficient composite load-bearing capacity between the inner and outer leaf panels prevent the high load-bearing effect of the wall panel from being realized, and the wall panel exhibits poor durability under conditions such as freeze-thaw cycles, salt corrosion, hot rain, and large temperature differences. Currently, although there is exploration of using high-performance concrete as a material for the leaf panels of wall panels, the improvement in wall panel performance brought by different types of high-performance concrete varies significantly. Moreover, while the use of high-performance concrete in the production of inner and outer leaf panels promotes the development of thin-walled and lightweight wall panels, it also significantly increases the overall construction cost. Additionally, excessively thin inner and outer leaf panels are not conducive to the anchoring of connectors, failing to guarantee the composite load-bearing capacity between the inner and outer leaf panels, thus affecting the load-bearing capacity and ductility of the wall panel.

[0004] In summary, given the contemporary construction market's pursuit of efficiency, environmental protection, and sustainable development, there is an urgent need to develop a building structure system that fully leverages the integrated insulation performance advantages of precast concrete sandwich insulated wall panels. This system should be based on improving the structure of traditional precast concrete sandwich insulated wall panels to enhance their load-bearing and durability performance. The goal is to achieve the following development objectives for precast concrete sandwich insulated wall panels: 1) Achieve efficient assembly during construction to meet the demands of rapid construction; 2) Achieve lightweight and high-strength standards in structural load-bearing capacity, optimizing building space utilization; 3) Meet ultra-low energy consumption requirements in building operation, providing excellent insulation performance; and 4) Exhibit high durability in complex service environments, ensuring long-term effectiveness. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-low energy consumption prefabricated sandwich insulation composite wall panel structure system. This structure system integrates multiple prefabricated components with structural load-bearing and insulation functions, and constructs an integrated architecture through bidirectional plug-in connection nodes. It can be quickly modularly assembled, greatly improving assembly efficiency, while avoiding the cumbersome construction problems caused by the separation of structural and insulation functions in traditional structures.

[0006] This invention is achieved through the following technical solution: An ultra-low energy consumption prefabricated sandwich insulated composite wall panel structure system includes multiple prefabricated components, including straight wall panels, L-shaped wall panels, insulated partition walls, insulated load-bearing floor slabs, and large-span roof panels. The straight wall panel and the L-shaped wall panel form a vertical load-bearing and external enclosure system. The insulated load-bearing floor slab is connected inside the vertical load-bearing and external enclosure system to form a horizontal load-bearing system. The insulated partition wall panel is set above the horizontal load-bearing system to form an indoor space partition system. The large-span roof panel is connected above the vertical load-bearing and external enclosure system to form a roof sealing system. All prefabricated components are connected by bidirectional plug-in nodes to form an integrated structural system. The bidirectional plug-in connection node is arranged at the joints and overlaps of each precast component. It includes a double-hole dumbbell-shaped pad and a bolt. The double-hole dumbbell-shaped pad is placed in the right-angled trapezoidal reinforcement area at the edge of the precast component. The bolt passes through the double-hole dumbbell-shaped pad and the reserved hole of the precast component and applies a pre-tightening force, so that the horizontal shear force of the adjacent precast components is transferred and the vertical displacement constraint is formed.

[0007] In this solution, various functional prefabricated components, such as straight wall panels and L-shaped wall panels, are integrated. The straight and L-shaped wall panels form a stable vertical load-bearing and external enclosure system, which, combined with insulated load-bearing floor slabs, forms a horizontal load-bearing system. Insulated partition walls allow for flexible partitioning of interior spaces, and large-span roof panels complete the roof sealing. All components are connected at joints and overlaps via bidirectional interlocking connection nodes. Double-hole dumbbell-shaped pads are fitted to the right-angled trapezoidal reinforcement areas on the edges of the prefabricated components. Bolts pass through the pads and pre-drilled holes to apply pre-tightening force, ensuring reliable transmission of power. The horizontal shear force of adjacent components can effectively constrain vertical displacement, ultimately forming an integrated structural system. This not only significantly improves assembly efficiency and enables rapid modular assembly, avoiding the cumbersome construction problems caused by the separation of structural and insulation functions in traditional structures, but also, through the integrated action of various systems, balances the stability of structural load-bearing capacity with the ultra-low energy consumption requirements of thermal insulation, optimizes the utilization rate of building space, and enhances the durability of the structure in complex service environments, while reducing energy consumption and maintenance costs throughout the building's life cycle.

[0008] As a further embodiment of the prefabricated sandwich insulated composite wall panel structural system, the straight wall panel includes an inner leaf panel, a sandwich insulated panel, and an outer leaf panel arranged sequentially from the inside to the outside. The sandwich insulation board is equipped with FRP connectors, and both the inner and outer leaf plates include an integrally connected straight section, a right-angled trapezoidal reinforcement area, and an isosceles trapezoidal reinforcement area. The right-angled trapezoidal reinforcement area is located at the end of the leaf plate and has reserved connection holes. The isosceles trapezoidal reinforcement area is located in the anchoring area of ​​the FRP connector. This not only allows the wall panel to have both reliable structural load-bearing performance and excellent thermal insulation effect, achieving a deep integration of structural and thermal insulation functions, but also provides sufficient and stable node areas for the connection between prefabricated components through the right-angled trapezoidal reinforcement area.

[0009] As a further embodiment of the prefabricated sandwich insulated composite wall panel structure system, the sandwich insulated panel is made into a polygonal block by extruded polystyrene or expanded polystyrene and is embedded between the inner leaf plate and the outer leaf plate with its edges flush with the leaf plate outline. The thickness of the sandwich insulated panel in the straight section is not less than 50 mm, and its edge in contact with the external environment is sprayed with UHPC slurry to form a protective layer. This not only fully utilizes the excellent thermal insulation performance of the selected insulation material to ensure that the wall panel meets the ultra-low energy consumption requirements, but also effectively resists the erosion of the insulation material by the external environment and extends the service life of the insulation structure. The FRP connector is composed of alternating transverse and longitudinal grid strips. The transverse grid strips have 0 / 90° multi-directional fiber cloth inside, and the longitudinal grid strips have ±45° multi-directional fiber cloth inside. The grid strips are ≥35mm wide, ≥8mm thick, and ≥40mm apart, thereby enhancing the structural strength and load-bearing capacity of the connector and enabling efficient transfer of loads between blades.

[0010] As a further embodiment of the prefabricated sandwich insulated composite wall panel structure system, the L-shaped wall panel serves as the external vertical load-bearing component at the four corners of the integrated structural system. It is formed by integrally casting two mutually perpendicular straight wall panels to create a 90° folded continuous sandwich insulation structure, ensuring the structural integrity and sealing of the corner area. This avoids the gaps, leaks, and thermal bridges that are prone to occur in traditional spliced ​​corners. Furthermore, a gradually changing guide angle with a length ≥100mm is provided on the inner leaf plate at the corner, which can effectively disperse the concentrated stress at the corner and improve the structural stability and crack resistance of the wall panel under complex stress conditions. At the same time, the L-shaped wall panel extends for 400-800mm in two vertical directions, further enhancing the spatial adaptability and overall load-bearing capacity of the entire prefabricated system.

[0011] As a further solution to the prefabricated sandwich insulated composite wall panel structure system, in order to further improve the structural integrity and durability of the partition wall panel, the insulated partition wall panel is an indoor non-load-bearing space partition component, which includes a thin-walled box-type UHPC cavity and a filling insulation board filled in the cavity. The thin-walled box-type UHPC cavity includes a rectangular UHPC inner leaf plate, a rectangular UHPC outer leaf plate, and UHPC edge sealing ribs on both sides, which are arranged in sequence. The thickness of the rectangular UHPC inner leaf plate and the rectangular UHPC outer leaf plate is no more than 30mm, the width of the UHPC edge sealing ribs on both sides is no less than 50mm and installation holes are reserved, the thickness of the filling insulation board is no less than 30mm, and its surface is provided with serrated interlocking patterns with an interlocking pattern depth of 0.5-1mm and a pattern spacing of no more than 3mm.

[0012] As a further embodiment of the prefabricated sandwich insulated composite wall panel structural system, the insulated load-bearing floor slab includes a thin bottom slab, trapezoidal dowel-reinforced insulated blocks, and a post-cast concrete top slab. The thin bottom plate has rectangular waffle grids on its surface. The waffle grids are staggered to form a mechanical anchoring interface and are used to embed the trapezoidal insert insulation block. The post-cast concrete top plate is poured on top of the thin bottom plate and the trapezoidal insert insulation block to form a closed insulation load-bearing structure. This not only meets the horizontal load-bearing requirements, but also achieves a deep integration of insulation function and structural load-bearing, effectively reducing building energy consumption. The thin base plate is at least 20mm thick, the rectangular waffle grid has a depth of at least 10mm and a side length of at least 150mm, the trapezoidal insert insulation block is a symmetrical trapezoidal block of autoclaved cement mortar-polystyrene beads composite, the gap between the bottom surface and the edge of the rectangular waffle grid is at least 2mm, the size of the top surface is 60% of the bottom surface, the height is at least 30mm, and inserts are arranged on the top, the diameter of the inserts is at least 6mm and the exposed length is at least 50mm, and the thickness of the post-cast concrete top plate is at least 30mm, which further enhances the connection strength with the post-cast concrete.

[0013] As a further solution to the prefabricated sandwich insulated composite wall panel structure system, in order to facilitate industrialized mass production and on-site assembly construction, the cross-sectional structure of the large-span roof panel is the same as that of the straight wall panel, and unbonded prestressed steel strand bundles are arranged along the entire length of the inner leaf plate that bears tensile stress, which can effectively offset the tensile stress generated by the roof panel under large-span conditions, and significantly improve the crack resistance, stiffness and load-bearing capacity of the roof panel.

[0014] As a further embodiment of the prefabricated sandwich insulated composite wall panel structural system, the double-hole dumbbell-shaped pad includes a variable curvature arc-shaped hole section, a corrugated gradually alternating shear-resistant section, and an arc-shaped transition section. The variable curvature arc-shaped hole section features a gradual stress diffusion path between its middle and tail sections, guiding uniform stress diffusion, avoiding stress concentration at the joint, and improving the stability and durability of the connection. The corrugated, gradually staggered shear-resistant section has continuous wavy lines along its long axis and discontinuous triangular toothed supports along its short axis, giving the joint bidirectional shear resistance and ensuring reliable transmission of horizontal shear force between adjacent precast components. The arc-shaped transition section is inclined and has a V-shaped deformation induction groove, which can achieve plastic energy-dissipating deformation under load, further enhancing the seismic buffering performance of the joint.

[0015] As a further embodiment of the prefabricated sandwich insulated composite wall panel structure system, the integrated structural system also includes a waterproof and thermal insulation structure. This structure includes stepped water-guiding channels extending from the edges of the inner and outer leaf plates. Adjacent wall panels are intersected by these stepped water-guiding channels to form a continuous double-segment inverted "Z"-shaped tongue and groove. The continuous double-segment inverted "Z"-shaped tongue and groove is equipped with multiple physical water-blocking barriers and moisture-exiting channels. This design utilizes the staggered design of the stepped water-guiding channels to construct the first line of waterproofing, effectively preventing direct infiltration of external rainwater and other moisture. Furthermore, the continuous double-segment inverted "Z"-shaped tongue and groove structure forms multiple physical barriers, further blocking the moisture penetration path. Simultaneously, the moisture-exiting channels can promptly discharge any small amount of infiltrated moisture, preventing moisture accumulation inside the wall panels that could lead to insulation layer dampness and failure or structural component corrosion. This achieves dual protection through active drainage and passive water blocking.

[0016] As a further solution to the prefabricated sandwich insulated composite wall panel structure system, the continuous double-segment reverse "Z" tongue and groove is equipped with a 90° bidirectional bend to form a double water-blocking barrier, and a hollow tube is set in its sandwich layer area to discharge infiltrated water vapor. Silicone-modified polyether weather-resistant sealant is embedded between adjacent outer leaf panels, and water-stop strips are filled between adjacent inner leaf panels. This solves the problem of easy water seepage at the splicing of traditional wall panels, and can effectively prevent the insulation layer from failing due to moisture, ensuring the long-term stability of the wall panel's thermal insulation performance.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This invention leverages the superior mechanical properties, durability, and self-compacting properties of ultra-high performance concrete to optimize traditional reinforced concrete components, designing a series of high-quality, lightweight precast components that combine structural load-bearing and thermal insulation properties. These components are cost-controllable, easy to process, and conducive to industrial mass production. 2. This invention proposes a bidirectional plug-in connection node system suitable for thin-walled precast components. By combining a double-hole dumbbell-shaped pad with a pre-tightening bolt, it solves the problems of difficulty in applying pre-tightening force and poor punching shear resistance at the connection nodes between thin-walled precast components. Furthermore, the corrugated gradually staggered shear-resistant section enables the node to have bidirectional shear resistance, and the presence of the arc transition section can improve the plastic energy dissipation of the node. 3. The present invention forms a novel ultra-low energy consumption structural system by assembling various prefabricated components using a bidirectional plug-in connection node system. While achieving high load-bearing capacity and lightweight integrated design of the structural system, it deeply integrates structural load-bearing capacity, thermal insulation and efficient assembly process, improves the efficiency of building assembly and promotes the green and low-carbon development of the entire building life cycle. 4. The external envelope structure used in this invention has a long service life and resistance to environmental erosion, with extremely low maintenance and repair costs. Furthermore, the node connection system eliminates the formation of thermal bridges, which can further reduce building operating energy consumption. 5. The active drainage-passive water blocking system formed by the stepped water guide channel and the reverse Z-shaped tongue and groove proposed in this invention is a new type of waterproof structure suitable for thin-walled sandwich insulation wall panels. While achieving high-efficiency waterproofing, it can effectively prevent the insulation layer from failing due to moisture and ensure the long-term stability of the wall panel's thermal insulation performance. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of a prefabricated ultra-low energy consumption sandwich insulated composite wall panel structure system provided by the present invention; Figure 2 This is a structural schematic diagram of the straight wall panel provided by the present invention; Figure 3 for Figure 2 A schematic diagram of the structure marked AA; Figure 4 This is a structural schematic diagram of the L-shaped wall panel provided by the present invention; Figure 5 for Figure 4 A schematic diagram of the structure marked BB in the middle; Figure 6 This is a schematic diagram of the structure of the thermal insulation partition wall panel provided by the present invention; Figure 7 for Figure 6 A schematic diagram of the structure marked CC; Figure 8 This is a structural schematic diagram of the thermal insulation load-bearing floor slab provided by the present invention; Figure 9 This is a structural schematic diagram of the large-span roof panel provided by the present invention; Figure 10 This is a schematic diagram of the structure of the bidirectional plug-in connection node provided by the present invention; Figure 11 This is a schematic diagram of the waterproof structure provided by the present invention.

[0019] The attached diagram shows the markings and corresponding component names: 1-Straight wall panel, 2-L-shaped wall panel, 3-Insulated partition wall panel, 4-Insulated load-bearing floor slab, 5-Large span roof panel, 6-Two-way interlocking connection node, 7-Corner, 8-Outer leaf plate, 9-Inner leaf plate, 10-Sandwich insulation board, 11-FRP connector, 12-Thin-walled box-type UHPC cavity, 13-Insulated board, 14-Thin bottom plate, 15-Trapezoidal interlocking insulation block, 16-Post-cast concrete roof 17-Unbonded prestressed steel strand bundle, 18-Double-hole dumbbell-shaped pad, 19-Bolt, 20-Continuous double-segment reverse "Z" tongue and groove, 21-Stepped water guide channel, 22-Hollow tube, 23-Silicone modified polyether weather-resistant sealant, 24-Water-stop strip, 25-Straight section, 26-Right-angled trapezoidal reinforcing area, 27-Isosceles trapezoidal reinforcing area, 28-Transverse grid strip, 29-Longitudinal grid strip, 30- Gradient chamfer, 31-Rectangular UHPC inner blade plate, 32-Rectangular UHPC outer blade plate, 33-Serrated interlocking pattern, 34-UHPC edge sealing rib, 35-Rectangular waffle grid, 36-Inserted rib, 37-Variable curvature arc-shaped hole section, 38-Arch-shaped transition section, 39-Corrugated gradient interlaced shear-resistant section, 40-V-shaped deformation-inducing groove, 41-Wave continuous pattern, 42-Discontinuous triangular toothed support. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. Example

[0021] This embodiment provides an ultra-low energy consumption prefabricated sandwich insulated composite wall panel structure system, such as... Figure 1 As shown, the structure includes five types of prefabricated components: a straight wall panel 1, an L-shaped wall panel 2, an insulated partition wall panel 3, an insulated load-bearing floor slab 4, and a large-span roof panel 5. These prefabricated components are assembled into an integrated structure via bidirectional interlocking connection nodes 6. Specifically, the straight wall panel 1 and L-shaped wall panel 2 form a vertical load-bearing and external enclosure system; the insulated load-bearing floor slab 4 forms a horizontal load-bearing system; the insulated partition wall panel 3 forms an interior space partitioning system; and the large-span roof panel 5 forms a roof sealing system. This integrated structure achieves structural load-bearing, thermal insulation, space division, and roof protection functions. The specific structure is as follows: like Figure 2 , Figure 3As shown, the straight wall panel 1 is the outer enclosure and internal vertical load-bearing component of the structural system. It consists of an outer leaf plate 8, an inner leaf plate 9, a sandwich insulation board 10, and an FRP connector 11, which are tightly integrated to form a whole.

[0022] Both the outer blade 8 and the inner blade 9 are made of thin-walled trapezoidal UHPC material and are arranged at intervals to form cavities. Both the outer blade 8 and the inner blade 9 are integrally formed and include a straight section 25, a right-angled trapezoidal reinforcement area 26, and an isosceles trapezoidal reinforcement area 27. The thickness of the straight section 25 is ≥20mm to ensure the foundation bearing capacity and insulation space. The right-angled trapezoidal reinforcement area 26 is arranged at the end of the blade, with a top edge length ≥50mm and a bottom edge length ≥100mm. It has a reserved connection hole with a diameter of 18mm to provide sufficient node area for the connection of adjacent components. The isosceles trapezoidal reinforcement area 27 is arranged in the anchoring area of ​​the FRP connector 11, with a top edge length ≥50mm and a bottom edge length ≥150mm to enhance the anchoring stability of the connector and ensure that the inner and outer blades work together.

[0023] Among them, the sandwich insulation board 10 is made of extruded polystyrene material into a polygonal insulation block. Each edge line is flush with the inner contour line of the inner and outer leaf plates and is tightly fitted into the cavity formed between the two leaf plates. The thickness of the board is ≥50mm in the straight section 25. The side with the edge in contact with the external environment is sprayed with 3mm thick UHPC slurry to form a protective layer, which effectively resists environmental erosion such as freeze-thaw and salt corrosion and avoids the failure of insulation materials.

[0024] The FRP connector 11 is formed by interlacing transverse grid strips 28 and longitudinal grid strips 29 to form a mesh structure, which is then embedded in the sandwich insulation board 10. The transverse grid strips 28 transfer the load between the blades through pins, while the longitudinal grid strips 29 ensure the stability and positioning accuracy of the transverse grid strips. The transverse grid strips 28 have untwisted rovings arranged between the two layers of resin matrix surface felt, with two layers of 0 / 90° glass fiber cloth inserted between the rovings. The longitudinal grid strips 29 have two layers of ±45° carbon fiber cloth inserted inside. The width of both the transverse and longitudinal grid strips is ≥35mm, the thickness is ≥8mm, and the spacing between the grid strips is ≥40mm, ensuring that the connector has both high strength and deformation resistance.

[0025] like Figure 4As shown in Figure 5, the L-shaped wall panel 2 is the vertical load-bearing component of the outer enclosure at the four corners of the structural system. It is integrally cast from two mutually perpendicular straight wall panels 1, forming a 90° folded continuous sandwich insulation structure, avoiding water seepage and thermal bridging problems caused by corner splicing gaps. The extension length of the L-shaped wall panel 2 in both vertical directions is within the range of 400-800mm, and it is fixed to the straight wall panels 1 in the two directions of the structural system on both sides through bidirectional plug-in connection nodes 6. The leaf plate at the corner is not equipped with a right-angled trapezoidal reinforcement zone 26 or an isosceles trapezoidal reinforcement zone 27. Instead, a gradually changing guide angle 30 with a length ≥100mm is set on the inner leaf plate 9. The guide angle adopts an arc transition design, which can effectively disperse the concentrated stress at the corner and improve the crack resistance of the structure.

[0026] like Figure 6 , Figure 7 As shown, the thermal insulation partition board 3 is an indoor non-load-bearing space partition component, composed of a thin-walled box-type UHPC cavity 12 and an insulated board 13, serving both space partitioning and thermal insulation functions. The thin-walled box-type UHPC cavity 12 is formed by sequentially welding together a rectangular UHPC inner leaf plate 31, a rectangular UHPC outer leaf plate 32, and UHPC edge sealing ribs 34 on both sides. The thickness of both the rectangular UHPC inner leaf plate 31 and the outer leaf plate 32 is ≤30mm, and the width of the UHPC edge sealing ribs 34 on both sides is ≥50mm. The edge ribs have pre-drilled installation holes with a diameter of 16mm to facilitate connection and fixation of the partition board to horizontal or vertical components.

[0027] Meanwhile, the insulation board 13 is made of expanded polystyrene material with a thickness of ≥30mm and a serrated interlocking pattern 33 pressed on its surface. The depth of the interlocking pattern is in the range of 0.5~1mm and the spacing of the pattern is ≤3mm. The insulation board 13 is tightly embedded in the thin-walled box-type UHPC cavity 12, and the serrated interlocking pattern 33 can significantly enhance the friction with the inner wall of the cavity, prevent displacement during use, and ensure the integrity of the structure.

[0028] like Figure 8 As shown, the thermal insulation load-bearing floor slab 4 is a horizontal load-bearing component, consisting of a thin bottom plate 14, a trapezoidal reinforcing bar insulation block 15, and a post-cast concrete top slab 16, forming a "precast and post-cast" composite thermal insulation load-bearing structure.

[0029] The thin base plate 14 is made of UHPC material with a thickness of ≥20mm. Rectangular waffle grids 35 are evenly distributed on the surface. The waffle grids 35 have a depth of ≤10mm and a side length of ≥150mm. They are staggered to form a mechanical anchoring interface, which not only enhances the bonding force with the post-poured concrete, but also provides an embedding space for the trapezoidal insert insulation block 15.

[0030] The trapezoidal reinforcing bar insulation block 15 is manufactured using an autoclaving process. Fine cement mortar is used to fill the gaps between polystyrene beads, creating a symmetrical trapezoidal block. The gap between the bottom surface and the edge of the rectangular waffle grid 35 is ≤2mm. The size of the top surface is 60% of the bottom surface size, and the height is ≥30mm. HRB400 grade reinforcing bars 36 with a diameter ≥6mm are welded to the top of the insulation block. The exposed length of the reinforcing bars 36 is ≥50mm, effectively enhancing the concentrated load-bearing capacity with the post-cast concrete top slab 16.

[0031] The post-cast concrete top slab 16 is made of C30 fine stone concrete. It is cast on site after the thin bottom slab 14 and the trapezoidal reinforcing bar insulation block 15 are installed and positioned. The thickness is ≥30mm. Together with the thin bottom slab 14 and the insulation block, it forms a closed insulation load-bearing structure, taking into account both horizontal load-bearing capacity and thermal insulation effect.

[0032] like Figure 9 As shown, the cross-sectional structure of the large-span roof panel 5 is consistent with that of the straight wall panel 1, consisting of outer leaf panels 8, inner leaf panels 9, sandwich insulation panels 10, and FRP connectors 11. Its dimensions are designed to adapt to the span of the structural system. To meet the stress requirements of the large span, this embodiment arranges unbonded prestressed steel strand bundles 17 with a diameter of 15.2 mm along the entire length of the inner leaf panel 9, which bears tensile stress. The spacing of the steel strand bundles 17 is 200 mm. Prestressing offsets the tensile stress of the roof panel under load, improving structural stiffness and crack resistance, and preventing deformation or cracking under large spans.

[0033] like Figure 10 As shown, the bidirectional plug-in connection node 6 is the core for realizing the integrated assembly of various prefabricated components. It is arranged at the horizontal and vertical joints between wall panels and the corbel 7 of wall panels and floor / roof panels, and consists of a double-hole dumbbell-shaped pad 18 and bolts 19.

[0034] Among them, the double-hole dumbbell-shaped pad 18 is made of Q355 steel and consists of three parts: a variable curvature arc-shaped hole section 37, a corrugated gradually alternating shear-resistant section 39, and an arc transition section 38, which are integrally formed. The variable curvature arc-shaped hole section 37 has a curvature radius of 20-30 mm in the middle and 10-15 mm at the tail, forming a gradual stress diffusion path. An annular groove with a depth of 0.5-1 mm is provided on the inner wall of the hole to enhance friction with the bolt 19. The corrugated gradually staggered shear-resistant section 39 has a continuous wave pattern 41 along its long axis edge, with a wavelength of 4-6 mm and a wave height of 0.3-0.5 mm. Discontinuous triangular toothed supports 42 are arranged along its short axis, with a tooth pitch of 2-3 mm and a tooth depth of 0.2-0.3 mm, forming a bidirectional shear-resistant mechanism. The arc-shaped transition section 38 is located between the variable curvature arc-shaped hole section 37 and the corrugated gradually staggered shear-resistant section 39, with an inclination angle of 5°-10°. A groove with a depth of 2-3 mm and a groove angle of 60° is provided on it. The V-shaped deformation induction groove 40 allows for plastic energy-dissipating deformation under load, thereby improving the seismic performance of the joint.

[0035] Among them, bolt 19 is an M20 high-strength bolt. When used with double-hole dumbbell-shaped pad 18, the double-hole dumbbell-shaped pad 18 is placed in the right-angled trapezoidal reinforcement area 26 at the edge of the precast component. After the bolt 19 passes through the variable curvature arc-shaped hole section 37 of the dumbbell-shaped pad 18 and the reserved hole of the component, a pre-tightening force is applied. In the horizontal direction, the shear force is borne by the corrugated gradually staggered shear-resistant section 39, and in the vertical direction, the displacement is constrained by the bolt pre-tightening force, so as to achieve a stable two-way connection between adjacent precast components.

[0036] In addition, in this embodiment, the overlapping part of the corbel 7 is a platform extending outward from the inner leaf plate 9 of the vertical load-bearing wall panel, which is used to support the floor slab or roof panel. The extension length of the platform is ≥50mm and the thickness is ≥30mm. A 20mm diameter hole is reserved in the corbel 7, which is aligned with the reserved hole in the floor slab or roof panel. It is fixed to the double-hole dumbbell-shaped pad 18 by bolts 19 to ensure the reliability of the connection between the horizontal and vertical components.

[0037] like Figure 11 As shown, this embodiment also includes a waterproof and heat-insulating structure, which consists of a stepped water guide channel 21, a continuous double-section reverse "Z" tongue and groove joint 20, a hollow tube 22, a silicone modified polyether weather-resistant sealant 23, and a water-stopping strip 24, forming an integrated protection system of active drainage and passive water blocking.

[0038] Specifically, the stepped water guide channel 21 is made by extending 30mm outward from the edges of the inner leaf plate 9 and the outer leaf plate 8. The stepped water guide channels 21 of adjacent wall panels interlock to form a continuous double-segment reverse "Z" shaped tongue and groove 20. This tongue and groove is suitable for both vertical and horizontal joint waterproofing, blocking the direct infiltration path of rainwater. The leaf plates of the continuous double-segment reverse "Z" shaped tongue and groove 20 are provided with 90° bidirectional bends, forming a double physical water-blocking barrier. Hollow tubes 22 with a diameter of 10mm are pre-embedded in the sandwich layer area. The hollow tubes 22 are arranged along the length of the tongue and groove with a spacing of 300mm. Through the combined effect of capillary effect and gravity, the small amount of water vapor that seeps in is quickly discharged to the outside. The gap between adjacent outer leaf plates 8 is filled with silicone modified polyether weather-resistant sealant 23 with a width of 15mm, and the gap between adjacent inner leaf plates 9 is filled with water-swellable sealing strips 24. The double sealing further enhances the waterproofing effect.

[0039] Assembly process: Complete the pouring of the building foundation and reserve pre-embedded bolt holes for connection with vertical components.

[0040] First, the L-shaped wall panel 2 is hoisted and fixed at the corner of the building. Then, the straight wall panel 1 is hoisted in sequence. The right-angled trapezoidal reinforcement area 26 of the adjacent wall panels is connected and fixed through the bidirectional plug-in connection node 6 to form a vertical load-bearing and external enclosure system.

[0041] The insulated load-bearing floor slab 4 is hoisted at the lap joint of the corbel 7 of the vertical component and fixed through the bidirectional plug-in connection node 6 to complete the assembly of the horizontal load-bearing system.

[0042] Insulated partition wall panels 3 are suspended above the insulated load-bearing floor slab 4 and fixed to the floor slab through pre-reserved holes in the side ribs to divide the interior space.

[0043] The large-span roof panel 5 is then hoisted and fixed to the top of the external enclosure system via bidirectional plug-in connection nodes 6, completing the overall assembly of the structural system.

[0044] Fill all joints with silicone-modified polyether weather-resistant sealant 23 and water-stop strip 24, check the drainage of hollow pipe 22, and ensure that the waterproof structure is in good working order.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ultra-low energy assembled sandwich thermal insulation composite wall panel structural system comprising a plurality of prefabricated components, characterized in that, The prefabricated components include a linear wallboard (1), an L-shaped wallboard (2), a thermal insulation partition wallboard (3), a thermal insulation load-bearing floor (4), and a large-span roof panel (5); The linear wallboard (1) and the L-shaped wallboard (2) form a vertical load-bearing and outer-enclosing system, the thermal insulation load-bearing floor (4) is connected to the vertical load-bearing and outer-enclosing system to form a horizontal load-bearing system, the thermal insulation partition wallboard (3) is arranged above the horizontal load-bearing system to form an indoor space partition system, and the large-span roof panel (5) is connected to the upper part of the vertical load-bearing and outer-enclosing system to form a roof sealing system, and each prefabricated component is connected through a bidirectional plug-in connection node (6) to form an integrated structure system. The bidirectional plug-in connection node (6) is arranged at the joint and overlapping part of each prefabricated component, and includes a double-hole dumbbell-shaped pad (18) and a bolt (19). The double-hole dumbbell-shaped pad (18) is placed in a right trapezoidal reinforced area at the edge of the prefabricated component, and the bolt (19) passes through the double-hole dumbbell-shaped pad (18) and the reserved hole of the prefabricated component to apply a pre-tightening force, so that the horizontal shear force of adjacent prefabricated components is transmitted and the vertical displacement constraint is formed.

2. The prefabricated sandwich thermal insulation composite wall panel structural system according to claim 1, characterized in that, The linear wallboard (1) includes an inner leaf plate (9), a sandwich thermal insulation plate (10), and an outer leaf plate (8) arranged in sequence from inside to outside. The sandwich thermal insulation plate (10) is arranged in the FRP connecting piece (11), and the inner leaf plate (9) and the outer leaf plate (8) each include an integrated flat section (25), a right trapezoidal reinforced area (26), and an isosceles trapezoidal reinforced area (27). The right trapezoidal reinforced area (26) is arranged at the end of the leaf plate and has a reserved connecting hole, and the isosceles trapezoidal reinforced area (27) is arranged in the anchoring area of the FRP connecting piece (11). 3.The assembled sandwich thermal insulation composite wall panel structure system according to claim 2, characterized in that, The sandwich thermal insulation plate (10) is made of extruded polystyrene or foamed polystyrene into a polygonal block and is embedded between the inner leaf plate (9) and the outer leaf plate (8) with the edge line flush with the leaf plate contour. The thickness of the sandwich thermal insulation plate (10) at the flat section (25) is not less than 50 mm, and the edge and the external environment contact surface are sprayed with UHPC slurry to form a protective layer. The FRP connecting piece (11) is composed of transverse grid strips (28) and longitudinal grid strips (29). The transverse grid strips (28) are internally provided with 0 / 90° multidirectional fiber cloth, and the longitudinal grid strips (29) are internally provided with ±45° multidirectional fiber cloth. The width of the grid strip is greater than or equal to 35 mm, the thickness is greater than or equal to 8 mm, and the spacing is greater than or equal to 40 mm.

4. The assembled sandwich thermal insulation composite wall panel structural system according to claim 2, characterized in that, The L-shaped wallboard (2) is an outer-enclosing vertical load-bearing component at the four corners of the integrated structure system. Two linear wallboards (1) are integrally poured to form a 90° folded continuous sandwich thermal insulation structure, and a length of the gradient type corner guide (30) is greater than or equal to 100 mm is arranged on the inner leaf plate (9) at the corner. The L-shaped wallboard (2) extends in two perpendicular directions with a length of 400-800 mm. 5.The assembled sandwich thermal insulation composite wall panel structure system according to claim 1, characterized in that, The thermal insulation partition wall (3) is a non-load-bearing indoor space separating component, which comprises a thin-walled box-shaped UHPC cavity (12) and a filled thermal insulation board (13) filled in the cavity. The thin-walled box-shaped UHPC cavity (12) comprises a rectangular UHPC inner leaf plate (31), a rectangular UHPC outer leaf plate (32) and two UHPC edge sealing ribs (34) in sequence. The thickness of the rectangular UHPC inner leaf plate (31) and the rectangular UHPC outer leaf plate (32) is not greater than 30 mm, the two UHPC edge sealing ribs (34) have a width of not less than 50 mm and a reserved mounting hole, the thickness of the filled thermal insulation board (13) is not less than 30 mm, and the surface of the filled thermal insulation board (13) is provided with a sawtooth-shaped occlusion line (33) with a depth of 0.5-1 mm and a pitch of not more than 3 mm. 6.The assembled sandwich thermal insulation composite wall panel structure system according to claim 1, characterized in that, The thermal insulation load-bearing floor (4) comprises a thin bottom plate (14), a ladder-shaped insert reinforcement thermal block (15) and a post-cast concrete top plate (16). The surface of the thin bottom plate (14) is provided with a rectangular waffle (35), the waffle (35) is arranged in a staggered manner to form a mechanical anchoring interface and is used for embedding the ladder-shaped insert reinforcement thermal block (15), and the post-cast concrete top plate (16) is cast on the top of the thin bottom plate (14) and the ladder-shaped insert reinforcement thermal block (15) to form a closed thermal insulation load-bearing structure. The thickness of the thin bottom plate (14) is not less than 20 mm, the depth of the rectangular waffle (35) is not greater than 10 mm, and the side length is not less than 150 mm; the ladder-shaped insert reinforcement thermal block (15) is a steam-cured cement mortar-polystyrene bead composite symmetrical trapezoidal block, the gap between the lower bottom surface and the edge of the rectangular waffle (35) is not greater than 2 mm, the size of the upper bottom surface is 60% of the size of the lower bottom surface, the height is not less than 30 mm, the top is provided with an insert (36), the diameter of the insert (36) is not less than 6 mm, and the exposed length is not less than 50 mm; and the thickness of the post-cast concrete top plate is not less than 30 mm.

7. The prefabricated sandwich composite wall panel structural system according to claim 2, wherein, The cross-sectional structure of the large-span roof panel (5) is the same as that of the one-wall panel (1), and a non-bonded prestressed steel strand bundle (17) is arranged in the inner leaf plate (9) which bears tensile stress. 8.The assembled sandwich thermal insulation composite wall panel structure system according to claim 1, characterized in that, The double-hole dumbbell-shaped pad plate (18) comprises a variable-curvature arc-shaped hole segment (37), a corrugated gradient-interleaved shear-resistant segment (39) and an arc-shaped transition segment (38). The variable-curvature arc-shaped hole segment (37) has a gradient stress diffusion path between the middle part and the tail part, the corrugated gradient-interleaved shear-resistant segment (39) is provided with a wavy continuous line (41) on the edge in the long-axis direction and a discontinuous triangular tooth line (42) in the short-axis direction, and the arc-shaped transition segment (38) is arranged in an inclined manner and provided with a V-shaped deformation induction groove (40). 9.The assembled sandwich thermal insulation composite wall panel structure system according to claim 2, characterized in that, The integrated structure system further comprises a waterproof thermal insulation structure, which comprises a stepped water guide groove (21) extended from the edges of the inner leaf (9) and the outer leaf (8), and adjacent wallboards are staggered to form a continuous double-section inverted "Z" type rebate (20) through the stepped water guide groove (21); the continuous double-section inverted "Z" type rebate (20) is provided with multiple physical water blocking barriers and water vapor guide channels. 10.The assembled sandwich thermal insulation composite wall panel structure system according to claim 9, characterized in that, The continuous double-section inverted "Z" type rebate (20) is provided with a 90° bidirectional angle to form a double-channel water blocking barrier, and a hollow pipe (22) is arranged in the sandwich layer area to guide the penetrated water vapor, a silicone modified polyether weatherproof sealant (23) is embedded between adjacent outer leaves (8), and a water stopping rubber strip (24) is filled between adjacent inner leaves (9).

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