A semi-prefabricated formwork-free thermal insulation concrete wall structure and construction technology

Abstract

The present invention belongs to the technical field of external insulation of prefabricated building projects, and particularly relates to a semi-prefabricated formwork-free concrete insulation wall structure and construction process. The insulation wall structure includes a semi-prefabricated composite wall, an insulation integrated panel and a tensioning assembly, wherein the semi-prefabricated composite wall and the insulation integrated panel are arranged in parallel and connected as a whole through multiple groups of tensioning assemblies, and a cast-in-place cavity is formed between the semi-prefabricated composite wall and the insulation integrated panel; a plurality of steel bar supports are embedded in the semi-prefabricated composite wall, and a plurality of insulation nails are arranged on the insulation integrated panel, and the steel bar supports and insulation nails are all exposed in the cast-in-place cavity. The semi-prefabricated composite wall of the present invention solves the problem of upper and lower through-connections of steel bars, making the building safer and more reliable; the internal and external two-way formwork-free greatly reduces the project cost, while achieving simple and quick construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of external thermal insulation of prefabricated building projects, and in particular relates to a semi-prefabricated formwork-free concrete thermal insulation wall structure and a construction process. Background Art

[0002] Exterior wall insulation has long been a major issue plaguing the construction industry. Traditionally, exterior wall insulation has been based on a post-anchoring and pasting method: first constructing the exterior wall structure, then securing the insulation layer with rivets, and then applying plaster over the insulation layer. This method, commonly known as the thin-plaster pasting method, not only lacks insulation and energy-saving effectiveness, but also presents difficulties in quality control and is prone to construction accidents such as shedding.

[0003] Currently, sandwich exterior walls are gaining widespread adoption, offering significantly improved results compared to traditional insulation methods. However, numerous challenges have been identified. Sandwich exterior walls are constructed as fully prefabricated walls, eliminating the need for on-site formwork. From the inside out, the walls are divided into: the inner leaf, a load-bearing concrete wall known as a shear wall, typically equipped with a double layer of load-bearing steel mesh and a minimum thickness of 200mm; the insulation layer, typically made of flexible insulation material, with its material and thickness determined by thermal engineering calculations; and the outer leaf, a thin concrete slab with a single layer of steel mesh, typically around 50mm thick. This does not contribute to the structural loads of the building and serves only to protect the insulation layer. The inner and outer leaf walls are clamped together using specialized "insulation connectors." These connectors are extremely demanding, ensuring that the outer leaf does not fall off while also avoiding the use of metal connectors such as rebar, which can easily cause "cold and thermal bridges."

[0004] The disadvantages of sandwich exterior walls are: the structure is complex, the inner leaf wall is the structural load-bearing structure, and the outer leaf wall cannot participate in the structural load-bearing structure. In other words, the inner and outer leaf walls cannot form a "composite structure" and cannot be connected by strong components such as steel bars. The main function of the outer leaf wall is to protect the insulation layer. At the same time, it must deform independently (mainly due to wind and temperature changes) and cannot be linked with the inner leaf wall. Because the insulation layer is clamped between the two leaf wall panels, a loose connection will form gaps, affecting the insulation effect. At the same time, the outer leaf wall panels will also be unstable; if the connection is too tight, it will form a "composite structure" and the exterior wall surface will crack. In addition, the inner leaf wall is a load-bearing component and is a solid wall prefabricated in the factory. During construction and installation, the upper and lower walls can only be connected using the "sleeve grouting connection" process (because the steel bars in the wall are disconnected, otherwise the prefabrication process cannot be used). The subsequent grouting process has serious uncertainties and is very likely to cause quality accidents. Secondly, insulation boards are flexible materials, and due to the manufacturing process, they are inevitably stepped on and squeezed, making them prone to deformation. Furthermore, wall curing can cause delamination and warping. Furthermore, solid walls are too heavy, requiring high-tonnage machinery to construct. Furthermore, alignment is difficult (the rebar heads extending from the top of the lower wall must be aligned with the reserved sleeves at the bottom of the upper wall), resulting in low construction efficiency and difficulty in ensuring quality.

[0005] The other type is the formwork-free, insulated exterior wall: This structure is a fully cast-in-place concrete wall with no external formwork, replaced by thermally insulated integrated panels. From the inside out, the wall consists of: a shear wall, a reinforced load-bearing structure, constructed using traditional cast-in-place techniques; an insulation layer, installed according to specifications; and an insulation board surface layer, which covers the insulation layer and adds strength. The insulation layer and surface layer are combined in the factory to form an "insulated integrated panel," which also serves as the formwork for the exterior wall. The exterior finish is typically plastered and spray-painted.

[0006] The disadvantages of formwork-free insulated exterior walls include: the inner formwork still uses traditional wood, steel, or aluminum alloy formwork. Wall reinforcement is tied on-site, failing to meet the basic requirements of prefabricated construction. Alignment is difficult: the inner formwork has numerous holes for tension bolts, making alignment with the outer insulation board difficult. The insulation layer is easily damaged and difficult to detect: Direct holes are drilled into the insulation layer without protective devices. During alignment, screws can easily poke and damage the soft insulation board. Because the holes are blindly drilled, damage is also difficult to detect. Wall precision control is also an issue. The insulation layer is soft and lacks a fixed position, making it susceptible to compression and deformation during tension bolting. The exterior, in particular, suffers from unevenness. There is also the problem of cold bridges. This occurs primarily due to the lack of protective measures during concrete pouring. During vibration, cement slurry can backflow, forming cold bridges that severely impact insulation effectiveness while being difficult to detect from the outside. Summary of the Invention

[0007] In view of the above problems, the purpose of the present invention is to provide a semi-prefabricated formwork-free concrete insulation wall structure and construction process to overcome the shortcomings of the existing insulation wall structure and production process.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A semi-prefabricated formwork-free insulated concrete wall structure includes a semi-prefabricated composite wall, an insulating integrated panel and a tensioning assembly, wherein the semi-prefabricated composite wall and the insulating integrated panel are arranged in parallel and connected as a whole by multiple groups of tensioning assemblies, and a cast-in-place cavity is formed between the semi-prefabricated composite wall and the insulating integrated panel; a plurality of steel bar supports are embedded in the semi-prefabricated composite wall, and a plurality of insulation nails are arranged on the insulating integrated panel, and the steel bar supports and insulation nails are exposed in the cast-in-place cavity.

[0010] The tensioning assembly includes an inner back rib, a wall thickness limiting sleeve, a tensioning screw, a tensioning nut and an outer back rib, wherein the inner back rib and the outer back rib are respectively arranged on the outside of the semi-prefabricated composite wall and the thermal insulation integrated panel, the wall thickness limiting sleeve is arranged between the semi-prefabricated composite wall and the thermal insulation integrated panel, the tensioning screw connects the inner back rib, the semi-prefabricated composite wall, the wall thickness limiting sleeve, the thermal insulation integrated panel and the outer back rib in series, and the ends are locked by tensioning nuts.

[0011] The pulling assembly also includes a prefabricated wall panel limiting tube and an insulation layer limiting ring. The prefabricated wall panel limiting tube is embedded in the semi-prefabricated composite wall, and the insulation layer limiting ring is embedded in the insulation integrated panel. The two ends of the wall thickness limiting sleeve are respectively abutted against the prefabricated wall panel limiting tube and the insulation layer limiting ring, and the pulling screw passes through the prefabricated wall panel limiting tube and the insulation layer limiting ring.

[0012] The insulation layer limiting ring includes a ring body and a wing disc arranged at the end of the ring body, wherein the ring body is embedded in the insulation integrated panel, the wing disc is attached to the inner wall of the insulation integrated panel, and abuts against one end of the wall thickness limiting sleeve; a plurality of repair holes are distributed on the ring body.

[0013] The inner back ribs and the outer back ribs have the same structure and both include a back rib body. The back rib body is a long strip structure with grooves. A plurality of back rib connecting holes are provided on the back of the back rib body. The back rib connecting holes are used to connect with the tension screws.

[0014] The inner back ribs and the outer back ribs have the same installation direction;

[0015] The back of the inner back rib is in contact with the outer surface of the semi-prefabricated composite wall, and the head of the tension screw is accommodated in the groove of the inner back rib;

[0016] The notch surface of the outer back rib is fitted with the outer surface of the thermal insulation integrated board, and the tension nut fixes the outer back rib on the outer side of the back of the outer back rib.

[0017] The tensioning assembly further comprises an outer back rib pad, which is accommodated in a groove of the outer back rib and connected to the tensioning screw.

[0018] The steel bar support is a Z-shaped structure, including a fixed end, a support limit rod and a binding end, wherein the fixed end is pre-buried in the semi-prefabricated composite wall, and the binding end is located in the cast-in-place cavity and connected to the fixed end through the support limit rod.

[0019] A construction process for the semi-prefabricated formwork-free thermal insulation concrete wall structure as described above, the construction process comprising the following steps:

[0020] 1) Make semi-prefabricated composite walls;

[0021] Support the side mold on the mold table;

[0022] Pre-embedded prefabricated wall panel limit pipes, laying stressed steel mesh and tying steel bar brackets;

[0023] Concrete pouring;

[0024] Maintenance;

[0025] 2) Making thermal insulation integrated panels;

[0026] Cutting boards;

[0027] Hole forming: ensure that the pre-formed holes on the thermal insulation integrated panels correspond to the pre-buried prefabricated wall panel limit pipes on the semi-prefabricated composite walls;

[0028] Insert a thermal insulation layer limiting ring into the pre-formed hole;

[0029] Arrange insulation nails on the insulation integrated board, the insulation nails pass through the insulation integrated board and are exposed on the outside of the insulation integrated board;

[0030] 3) On-site installation;

[0031] The semi-prefabricated composite wall was hoisted into place;

[0032] Lay the cavity steel mesh and bury the butt steel bars at the binding end of the steel support;

[0033] Semi-prefabricated composite walls and thermal insulation integrated panels are made by connecting the tension components;

[0034] Concrete is poured in the cast-in-place cavity;

[0035] Curing and forming;

[0036] Remove the tensioning components;

[0037] Sealing holes in concrete walls and insulation layers.

[0038] During the on-site installation process in step 3), two layers of back ribs can be installed on the outside of the thermal insulation integrated board. The two layers of back ribs are connected to the outer back ribs in a back-to-back manner, and anti-expansion pads are fixed between the two layers of back ribs and the thermal insulation integrated board.

[0039] The advantages and beneficial effects of the present invention are:

[0040] The semi-prefabricated composite wall of the present invention solves the problem of upper and lower through-connections of steel bars, making the building safer and more reliable; the internal and external two-way support-free formwork greatly reduces the project cost while achieving simple and quick construction.

[0041] The invention requires little equipment investment and has quick results; there are no dead angles during the on-site installation of the insulation board, and the insulation effect is fully guaranteed;

[0042] The invention has a simple process and greatly improves work efficiency; at the same time, it solves the problem of overall wall precision, making the building as a whole more aesthetically pleasing.

[0043] The present invention solves the problems of easy cracking and mold expansion during wall casting; it achieves integration of thermal insulation and structure, is energy-saving and environmentally friendly, does not fall off, and greatly reduces the overall project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of the semi-prefabricated formwork-free concrete insulation wall structure of the present invention;

[0045] Figure 2 Schematic diagram of the structure of the semi-prefabricated composite wall in the present invention;

[0046] Figure 3 It is a structural schematic diagram of the steel bar support in the present invention;

[0047] Figure 4 Schematic diagram of the structure of the thermal insulation integrated board of the present invention;

[0048] Figure 5 Schematic diagram of the structure of the thermal insulation layer limiting ring in the present invention;

[0049] Figure 6 It is a structural diagram of the back rib in the present invention;

[0050] Figure 7 for Figure 6 Right view of;

[0051] Figure 8 It is a schematic diagram of on-site installation of the present invention.

[0052] In the figure: 1 is the inner back rib, 101 is the back rib body, 102 is the back rib connecting hole, 2 is the wall thickness limiting sleeve, 3 is the insulation layer limiting ring, 301 is the ring body, 302 is the middle hole, 303 is the wing plate, 304 is the repair hole, 4 is the outer back rib pad, 5 is the tension screw, 6 is the tension nut, 7 is the semi-prefabricated composite wall, 8 is the insulation integrated board, 801 is the insulation layer, 802 is the insulation layer outer lining, 803 is the insulation layer inner lining, 804 is the prefabricated hole, 9 is the steel bar bracket, 901 is the fixed end, 902 is the support limiting rod, 903 is the binding end, 10 is the insulation nail, 11 is the outer back rib, 12 is the prefabricated wall panel limiting pipe, 13 is the cast-in-place cavity, and 14 is the second layer back rib. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] like Figure 1 As shown, the present invention provides a semi-prefabricated formwork-free insulated concrete wall structure, including a semi-prefabricated composite wall 7, an insulation integrated panel 8 and a tensioning assembly, wherein the semi-prefabricated composite wall 7 and the insulation integrated panel 8 are arranged in parallel and connected as a whole through multiple groups of tensioning assemblies, and a cast-in-place cavity 13 is formed between the semi-prefabricated composite wall 7 and the insulation integrated panel 8; a plurality of steel bar supports 9 are embedded in the semi-prefabricated composite wall 7, and a plurality of insulation nails 10 are arranged on the insulation integrated panel 8, and the steel bar supports 9 and the insulation nails 10 are all exposed in the cast-in-place cavity 13.

[0055] like Figure 1 As shown, in an embodiment of the present invention, the tensioning assembly includes an inner back rib 1, a wall thickness limiting sleeve 2, a tensioning screw 5, a tensioning nut 6 and an outer back rib 11, wherein the inner back rib 1 and the outer back rib 11 are respectively arranged on the outside of the semi-prefabricated composite wall 7 and the thermal insulation integrated board 8, the wall thickness limiting sleeve 2 is arranged between the semi-prefabricated composite wall 7 and the thermal insulation integrated board 8, the tensioning screw 5 sequentially connects the inner back rib 1, the semi-prefabricated composite wall 7, the wall thickness limiting sleeve 2, the thermal insulation integrated board 8 and the outer back rib 11 in series, and the ends are locked by the tensioning nut 6.

[0056] like Figure 1-2 As shown, on the basis of the above embodiment, the pulling assembly also includes a prefabricated wall panel limiting tube 12 and an insulation layer limiting ring 3. The prefabricated wall panel limiting tube 12 is embedded in the semi-prefabricated composite wall 7, and the insulation layer limiting ring 3 is embedded in the insulation integrated panel 8. The two ends of the wall thickness limiting sleeve 2 are respectively abutted against the prefabricated wall panel limiting tube 12 and the insulation layer limiting ring 3, and the pulling screw 5 passes through the prefabricated wall panel limiting tube 12, the wall thickness limiting sleeve 2 and the insulation layer limiting ring 3 in sequence.

[0057] like Figure 3 As shown, in the embodiment of the present invention, the steel bar support 9 is a Z-shaped structure, including a fixed end 901, a support and limit rod 902, and a binding end 903. The fixed end 901 is pre-buried in the semi-prefabricated composite wall 7, and the binding end 903 is located in the cast-in-place cavity 13 and is connected to the fixed end 901 through the support and limit rod 902. Specifically, the steel bar support 9 is an integrated structure, and the fixed end 901 is parallel to the binding end 903.

[0058] The specifications and arrangement intervals of the steel support 9 are implemented according to the design requirements. Its main function is to form a fixed platform for the other steel mesh (cast-in-situ cavity steel mesh) of the concrete wall. Specifically, the fixed end 901 is tied or welded to the steel mesh in the semi-prefabricated composite wall 7; the support limit rod 902 is calculated in length according to the wall thickness and the specifications of the stressed steel bars. The other stressed steel mesh of the concrete wall is tied to the tied end 903.

[0059] The semi-prefabricated composite wall 7 is an integral load-bearing component. Load-bearing steel reinforcement is installed within the semi-prefabricated composite wall 7 according to design requirements to ensure optimal overall mechanical performance after on-site assembly. This composite wall 7 serves as both a load-bearing component and a formwork, eliminating the need for additional formwork during cast-in-place concrete. The inner surface of the semi-prefabricated composite wall 7 is roughened to facilitate optimal bonding with the cast-in-place concrete. Generally, the roughened surface must account for no less than 80% of the total area, with a minimum roughness of 4.0 mm.

[0060] like Figure 4As shown, in an embodiment of the present invention, the thermal insulation integrated panel 8 includes an insulation layer 801 and an insulation layer outer lining panel 802 and an insulation layer inner lining panel 803 located on both sides of the insulation layer 801, wherein the material, specification and thickness of the insulation layer 801 are manufactured by the factory according to the design requirements. The insulation layer outer lining panel 802 is flatly pasted on the outside of the insulation layer 801 and has a certain strength and rigidity. The insulation layer inner lining panel 803 is pasted on the inside of the insulation layer 801. Some insulation materials do not require an inner lining panel. Pre-formed holes 804 are set on the thermal insulation integrated panel 8, and the vacancies of the pre-formed holes 804 correspond one-to-one to the prefabricated wall panel limiting tubes 12 in the semi-prefabricated composite wall 7, and the insulation layer limiting ring 3 is inserted into the pre-formed hole 804.

[0061] like Figure 5 As shown, in an embodiment of the present invention, the insulation layer limiting ring 3 includes a ring body 301 and a wing disc 303 arranged at the end of the ring body 301, wherein the ring body 301 is embedded in the pre-formed hole 804 of the insulation integrated plate 8, and the wing disc 303 is attached to the inner wall of the insulation integrated plate 8 and abuts against one end of the wall thickness limiting sleeve 2; a plurality of repair holes 304 are distributed on the ring body 301.

[0062] Because the insulation layer 801 of the thermal insulation integrated panel 8 is made of soft material, it is easy to be deformed by squeezing, which affects the insulation effect and destroys the appearance. Therefore, the insulation layer limiting ring 3 is made of pressure-resistant material, such as PVC. That is, it must be ensured that it is not easy to deform, and the thermal conductivity must be close to that of the insulation layer 801 to avoid the cold bridge phenomenon. The insulation layer limiting ring 3 is permanently cast in the wall. Specifically, the ring body 301 is made of a material with high compressive strength to ensure that it can resist pressure without deformation. The middle hole 302 in the ring body 301 is the entry and exit channel for the tension bolts, and the wing disc 303 is tightly pressed against the wall thickness limiting sleeve 2 to protect the insulation layer hole and ensure that the slurry is not poured back when the concrete is poured. The function of the repair hole 304 is: when the insulation layer is bored, the surrounding area of ​​the hole may be damaged. If it is not filled and repaired, the insulation effect of the wall will be compromised. When sealing the holes in the insulation layer, on-site foaming material is generally used, and the gap outside the pipe body can be fully filled by repairing the hole 304.

[0063] Insulation nails 10 are standard components of the insulation system and serve as load-bearing components that anchor the insulation layer. The nail heads of the insulation nails 10 must not only penetrate the insulation layer but also be anchored into the concrete wall panel. The anchoring depth is determined by the design. The material of the insulation nails must be strictly selected according to relevant specifications to prevent cold bridges.

[0064] Specifically, the wall thickness limiting sleeve 2 is made of high-strength materials such as steel, plastic, and concrete. When tightened, the tension bolts provide support and limit the precision of the cast-in-place cavity, ensuring the total thickness of the wall and ensuring construction conforms to design requirements. The wall thickness limiting sleeve 2 leverages the tension of the tension bolts 5 to form a precise support structure, permanently anchoring the pipe body within the concrete wall.

[0065] like Figure 6-7 As shown, in an embodiment of the present invention, the inner back rib 1 and the outer back rib 11 have the same structure and both include a back rib body 101. The back rib body 101 is a long strip structure with grooves. A plurality of back rib connection holes 102 are provided on the back of the back rib body 101. The back rib connection holes 102 are used to connect with the tension screw 5.

[0066] Specifically, the back rib body 101 is made of high-strength materials, such as steel, aluminum alloy, high-strength plastic, etc. The back rib connection holes 102 are strip holes, which are arranged along the length direction of the back rib body 101 to facilitate alignment at any position and mutual locking.

[0067] like Figure 1 As shown, in this embodiment, the installation direction of the inner back rib 1 and the outer back rib 11 is the same; the back of the inner back rib 1 is in contact with the outer surface of the semi-prefabricated composite wall 7, and the head of the tension screw 5 is accommodated in the groove of the inner back rib 1; the notch surface of the outer back rib 11 is in contact with the outer surface of the thermal insulation integrated board 8, so as to avoid the hole pad, especially to facilitate the connection of the second layer of back rib 14, as shown in FIG. Figure 8 The tension nut 6 fixes the outer back rib 11 on the outer side of the back of the outer back rib 11.

[0068] like Figure 1 As shown, based on the above embodiment, the tensioning assembly further includes an outer back rib pad 4 , which is accommodated in the groove of the outer back rib 11 and connected to the tensioning screw 5 .

[0069] Specifically, the outer back rib pad 4 is a compression block with a central hole. One end of the outer back rib pad 4 presses against the insulation layer limit ring 3, and the other end presses against the inner side of the outer back rib 11 to ensure that each layer of the wall is accurate and stable when the tension bolts are tightened.

[0070] A construction process for a semi-prefabricated formwork-free thermal insulation concrete wall structure as in any one of the above embodiments, the construction process comprising the following steps:

[0071] 1) Making a semi-prefabricated composite wall 7;

[0072] Support the side mold on the mold table;

[0073] Embed the prefabricated wall panel limiting pipe 12, lay the stress-bearing steel mesh and help tie the steel bar bracket 9;

[0074] Concrete pouring;

[0075] Maintenance;

[0076] 2) Making the thermal insulation integrated board 8;

[0077] Cutting boards;

[0078] Hole forming: ensure that the pre-formed holes 804 on the thermal insulation integrated board 8 correspond to the pre-buried prefabricated wall panel limiting tubes 12 on the semi-prefabricated composite wall 7;

[0079] A thermal insulation layer limiting ring 3 is inserted into the pre-formed hole 804;

[0080] Arrange insulation nails 10 on the insulation integrated board 8, and the insulation nails 10 pass through the insulation integrated board 8 and are exposed on the outside of the insulation integrated board 8;

[0081] 3) On-site installation;

[0082] The semi-prefabricated composite wall 7 is hoisted into place, temporary fixed support rods are installed, and the verticality of the wall is adjusted;

[0083] The cavity steel mesh is laid and the butt-jointed steel bars are buried at the binding end 903 of the steel support 9; specifically, according to the requirements of the design drawings, the shear wall is composed of two pieces of steel mesh, one of which has been pre-buried in the semi-prefabricated composite wall 7, and the other piece is tied to the binding end 903. In this way, after the cavity is cast in situ concrete and overlapped with the semi-prefabricated composite wall 7, a complete shear wall is formed; the pre-buried wire tube is passed through the cast-in-situ cavity 13, one end of which is connected to the pre-buried wire box in the semi-prefabricated composite wall 7, and the other end is processed according to the design requirements; the upper and lower ends of the cavity will be buried with butt-jointed steel bars according to the design requirements, and the butt-jointed steel bars can be conveniently arranged in the cavity, which can better ensure the quality of the upper and lower connections of the wall;

[0084] The semi-prefabricated composite wall 7 and the thermal insulation integrated panel 8 are manufactured by connecting the tensioning components;

[0085] Concrete pouring in the cast-in-place cavity 13;

[0086] Curing and forming;

[0087] Remove the tensioning components;

[0088] The holes in the concrete wall and the insulation layer are blocked by using foam glue so that the gaps in the insulation layer that may appear outside the insulation layer limiting ring 3 can be filled through the repair hole 304 on the insulation layer limiting ring 3.

[0089] like Figure 8 As shown, during the on-site installation process in step 3), a second layer of back ribs 14 can be installed on the outside of the thermal insulation integrated panel 8, the second layer of back ribs 14 and the outer back ribs 11 are connected back to back, and an anti-expansion pad 15 is added between the second layer of back ribs 14 and the thermal insulation integrated panel 8.

[0090] Specifically, the second-layer back ribs 14 are only necessary when the spacing strength of the first-layer back ribs is insufficient to withstand the pressure of the concrete pouring mold expansion. When in use, the second-layer back ribs 14 are generally perpendicular to the first-layer back ribs and locked to them. Specifically, they are locked with T-bolts, while simultaneously compressing the anti-expansion pads 15.

[0091] The semi-prefabricated composite wall of the present invention solves the problem of upper and lower through-connections of steel bars, making the building safer and more reliable; the internal and external two-way support-free formwork greatly reduces the project cost while achieving simple and quick construction.

[0092] The present invention solves the problems of easy cracking and mold expansion during wall casting; it achieves integration of thermal insulation and structure, is energy-saving and environmentally friendly, does not fall off, and greatly reduces the overall project cost.

[0093] The above description is only an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the scope of protection of the present invention.

Claims

1. A semi-prefabricated formwork-free thermal insulation concrete wall structure, characterized in that: The invention comprises a semi-prefabricated composite wall (7), a thermal insulation integrated panel (8) and a tensioning assembly, wherein the semi-prefabricated composite wall (7) and the thermal insulation integrated panel (8) are arranged in parallel and connected as a whole through a plurality of groups of tensioning assemblies, and a cast-in-place cavity (13) is formed between the semi-prefabricated composite wall (7) and the thermal insulation integrated panel (8); a plurality of steel support brackets (9) are embedded in the semi-prefabricated composite wall (7), a plurality of thermal insulation nails (10) are arranged on the thermal insulation integrated panel (8), and the steel support brackets (9) and the thermal insulation nails (10) are exposed in the cast-in-place cavity (13); The tensioning assembly comprises an inner back rib (1), a wall thickness limiting sleeve (2), a tensioning screw (5), a tensioning nut (6) and an outer back rib (11), wherein the inner back rib (1) and the outer back rib (11) are respectively arranged on the outer sides of the semi-prefabricated composite wall (7) and the thermal insulation integrated board (8), the wall thickness limiting sleeve (2) is arranged between the semi-prefabricated composite wall (7) and the thermal insulation integrated board (8), the tensioning screw (5) connects the inner back rib (1), the semi-prefabricated composite wall (7), the wall thickness limiting sleeve (2), the thermal insulation integrated board (8) and the outer back rib (11) in series, and the ends are locked by the tensioning nut (6); The tensioning assembly further comprises a prefabricated wall panel limiting tube (12) and an insulation layer limiting ring (3); the prefabricated wall panel limiting tube (12) is embedded in the semi-prefabricated composite wall (7); the insulation layer limiting ring (3) is embedded in the insulation integrated board (8); both ends of the wall thickness limiting sleeve (2) are respectively in contact with the prefabricated wall panel limiting tube (12) and the insulation layer limiting ring (3); the tensioning screw (5) passes through the prefabricated wall panel limiting tube (12) and the insulation layer limiting ring (3); The steel bar support (9) is a Z-shaped structure, comprising a fixed end (901), a support and limit rod (902), and a binding end (903), wherein the fixed end (901) is pre-buried in the semi-prefabricated composite wall (7), and the binding end (903) is located in the cast-in-place cavity (13) and connected to the fixed end (901) via the support and limit rod (902); The thermal insulation layer limiting ring (3) comprises a ring body (301) and a wing disc (303) arranged at the end of the ring body (301), wherein the ring body (301) is embedded in the thermal insulation integrated plate (8), and the wing disc (303) is attached to the inner wall of the thermal insulation integrated plate (8) and abuts against one end of the wall thickness limiting sleeve (2); a plurality of repair holes (304) are distributed on the ring body (301).

2. The semi-prefabricated formwork-free thermal insulation concrete wall structure according to claim 1, characterized in that: The inner back rib (1) and the outer back rib (11) have the same structure and both include a back rib body (101). The back rib body (101) is a long strip structure with a groove. The back of the back rib body (101) is provided with a plurality of back rib connecting holes (102). The back rib connecting holes (102) are used to connect with the tension screw (5).

3. The semi-prefabricated formwork-free thermal insulation concrete wall structure according to claim 2, characterized in that: The inner back rib (1) and the outer back rib (11) are installed in the same direction; The back of the inner back rib (1) is in contact with the outer surface of the semi-prefabricated composite wall (7), and the head of the tension screw (5) is accommodated in the groove of the inner back rib (1); The notch surface of the outer back rib (11) is fitted with the outer surface of the thermal insulation integrated plate (8), and the tension nut (6) fixes the outer back rib (11) on the outer side of the back of the outer back rib (11).

4. The semi-prefabricated formwork-free thermal insulation concrete wall structure according to claim 3, characterized in that: The tensioning assembly further comprises an outer back rib pad (4), the outer back rib pad (4) being accommodated in a groove of the outer back rib (11) and connected to the tensioning screw (5).

5. A construction process for a semi-prefabricated formwork-free thermal insulation concrete wall structure according to any one of claims 1 to 4, characterized in that: The construction process includes the following steps: 1) Making semi-prefabricated composite walls (7); Support the side mold on the mold table; Pre-embedded prefabricated wall panel limiting pipes (12), laying stressed steel mesh and helping to tie steel bar brackets (9); Concrete pouring; Maintenance; 2) making a thermal insulation integrated board (8); Cutting boards; Hole forming: ensuring that the pre-formed holes (804) on the thermal insulation integrated board (8) correspond to the pre-buried prefabricated wall panel limiting tubes (12) on the semi-prefabricated composite wall (7); A thermal insulation layer limiting ring (3) is inserted into the pre-formed hole (804); Arranging insulation nails (10) on the insulation integrated plate (8), wherein the insulation nails (10) penetrate the insulation integrated plate (8) and are exposed on the outside of the insulation integrated plate (8); 3) On-site installation; The semi-prefabricated composite wall (7) is hoisted into place; Laying a cavity steel mesh and burying butt-jointed steel bars at the binding end (903) of the steel bar support (9); Connecting the semi-prefabricated composite wall (7) and the thermal insulation integrated panel (8) through a tensioning assembly; Concrete is poured in the cast-in-place cavity (13); Curing and forming; Remove the tensioning components; Sealing holes in concrete walls and insulation layers.

6. The construction process according to claim 5, characterized in that: During the on-site installation process in step 3), a second layer of back ribs (14) is installed on the outer side of the thermal insulation integrated panel (8), the second layer of back ribs (14) and the outer back ribs (11) are connected back to back, and an anti-expansion pad (15) is fixed between the second layer of back ribs (14) and the thermal insulation integrated panel (8).

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