Fabricated high-titanium heavy slag concrete laminated shear wall

Abstract

The utility model relates to the technical field of building construction, in particular to an assembly type high-titanium heavy slag concrete laminated shear wall which comprises a post-pouring concrete layer, a heat preservation layer and prefabricated reinforced concrete plates on the two sides. The prefabricated reinforced concrete plate comprises a prefabricated inner wall plate and a prefabricated outer wall plate, the prefabricated outer wall plate is fixedly connected with the heat preservation layer in an attached mode, and the prefabricated inner wall plate is connected with the heat preservation layer through a connecting piece. The shear wall comprises the laminated layer and the cast-in-place layer, the laminated layer is formed by laminating the two high-titanium heavy slag precast concrete wallboards through the truss steel bars, concrete can be poured between the two layers of precast slabs after field installation in place, the two layers of precast slabs are connected with cast-in-place parts such as edge components to form a whole, and the cast-in-place technology and the prefabrication technology are combined; and the advantages of cast-in-place and prefabrication are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an assembled high-titanium heavy slag concrete composite shear wall. Background Art

[0002] Prefabricated buildings offer superior environmental protection, safety, and durability compared to cast-in-place buildings, aligning with the future development direction of China's construction industry. Prefabricated shear wall PC components are a crucial component of prefabricated buildings and a key path to modernizing the residential industry. Prefabricated shear wall structures, primarily composed of prefabricated or semi-prefabricated wall panels, are constructed through on-site assembly and partial casting. They offer advantages such as high construction quality, rapid production, environmental protection, resource conservation, and sustainable social development.

[0003] With the development of prefabricated construction, composite shear wall systems gradually entered the Chinese market. However, due to the immaturity of basic research related to prefabricated construction, limitations in seismic fortification standards, and insufficient market acceptance, this system was not widely adopted. However, after several generations of technological iterations and improvements, the composite shear wall system has been further refined, and the composite concrete shear wall structure is now suitable for China's current conditions. Composite wall panels are constructed from two layers of precast panels and lattice reinforcement. After on-site installation, concrete is poured between the two precast panels and connected to cast-in-place edge components to form a complete structure. This system combines the advantages of cast-in-place and prefabrication, and is widely used in above-ground and underground structures. The composite shear wall system utilizes a dowel-jointed lap joint technique, which solves the quality and safety issues of longitudinal reinforcement grouting sleeve connections during wall construction, replacing the grouting sleeve connection technique. It also uses high-titanium heavy slag as a concrete aggregate, helping to resolve overcapacity in the Panzhihua region and injecting new vitality into the construction industry. Utility Model Content

[0004] The purpose of the utility model is to provide an assembled high-titanium heavy slag concrete composite shear wall, which addresses the quality and safety issues of the longitudinal steel bar grouting sleeve connection in the existing wall construction, and replaces the grouting sleeve connection technology, which has the problems of complex connection process, inconvenient installation and long construction period.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] An assembled high-titanium heavy slag concrete composite shear wall, the shear wall comprising a post-cast concrete layer, an insulation layer, and precast reinforced concrete slabs on both sides; the precast reinforced concrete slabs comprise precast inner leaf wall panels and precast outer leaf wall panels, the precast outer leaf wall panels are fixedly connected to the insulation layer, and the precast inner leaf wall panels are connected to the insulation layer via connectors;

[0007] A reserved cavity and truss steel bars are provided between the prefabricated inner leaf wall panel and the insulation layer. The reserved cavity is poured to form a post-cast concrete layer. One end of the truss steel bar is connected to the prefabricated inner leaf wall panel, and the other end is confined in the post-cast concrete layer.

[0008] Furthermore, the wall thickness of the shear wall is 200mm, the thickness of the prefabricated inner wall panel and the prefabricated outer wall panel are both 50mm; the thickness of the post-cast concrete layer is 150mm; the inner side surface of the prefabricated outer wall panel, the inner side surface of the prefabricated inner wall panel, and both sides of the insulation layer are provided with rough surfaces for improving the bonding strength, and the thickness of the protective layer of the steel bars in the prefabricated wall panel on the side of the middle cavity should not be less than 20mm.

[0009] Furthermore, the connecting piece is a U-shaped steel plate structure, and the prefabricated outer leaf wall panel and the insulation layer are connected to the prefabricated inner leaf wall panel through the connecting piece.

[0010] Furthermore, the truss steel bars are welded together by an upper chord steel bar, two lower chord steel bars and connected web steel bars. The overall structure is an array-type quadrangular pyramid structure, with multiple groups of truss steel bars arranged in parallel. They are arranged in the composite shear wall to connect the precast reinforced concrete slabs and post-cast concrete layers on both sides. The center spacing of the truss steel bars is 300mm, and is not more than 2 times the spacing of the vertically distributed steel bars. The horizontal distance between the steel truss and the precast reinforced concrete slabs on both sides is 100mm.

[0011] Furthermore, the strength of the post-cast concrete layer of the composite shear wall should not be lower than the strength grade of the precast reinforced concrete slab. If the concrete strength grades of the precast and cast-in-place parts are inconsistent, the lower concrete strength grade should be used for calculation.

[0012] Beneficial effects of the utility model:

[0013] The shear wall of the present invention includes a laminated layer and a cast-in-place layer. The laminated layer is formed by laminating two high-titanium heavy slag precast concrete wall panels through truss steel bars. After on-site installation, concrete can be poured between the two layers of precast panels and connected to the cast-in-place parts such as edge components to form a whole. It combines the two technologies of cast-in-place and precast, and has the advantages of both cast-in-place and precast. The light weight and horizontal joint method of the wall panels can effectively avoid the problems of loose grouting of steel sleeves or slurry anchor connection methods, and the difficulty of distributing steel bars in holes. After construction, the structure has strong integrity and good waterproof effect of the joints. At the same time, the lower groove at the joints of traditional laminated panels is eliminated, which can reduce the secondary construction at the joints. At the same time, the use of high-titanium heavy slag as concrete aggregate promotes the resolution of excess production capacity in the Panzhihua region and injects new vitality into the construction industry.

[0014] The prefabricated composite shear wall of this utility model improves construction efficiency by using truss steel bars to replace the traditional grouting sleeve connection technology. From the internal mechanism point of view, the design of the truss steel bars simplifies the connection process of the longitudinal steel bars, reduces the complexity of the process and the risk of errors in the installation link. This simplification not only improves the efficiency of installation, but also ensures the construction quality of the connection, because the welded truss steel bar array structure can more effectively transfer and distribute stress, avoiding the quality instability problem caused by the traditional grouting process. In addition, the fixed spacing and structural form of the truss steel bars make the wall construction more standardized and controllable, reduce the influence of human factors, and significantly shorten the construction period.

[0015] Vertical connections are made by inserting rebar into the cavity and then pouring concrete into it, connecting the upper and lower walls into a single unit. This results in a larger joint surface, better structural integrity, and more reliable waterproofing. The size of the vertical cavity is much larger than the space required for inserting rebar, making composite walls easier to construct during installation. Inserting rebar connections is convenient and easy to construct, and quality is easily assured: there are no difficulties with precise positioning of solid wall reinforcement and sleeves. At the same time, due to the presence of the cavity, a wall of the same width and height is approximately 1 / 2 lighter than a conventional wall. Therefore, a smaller tower crane can be used for lifting, and larger prefabricated walls can be constructed while maintaining the same weight.

[0016] In terms of structural safety, the use of high-titanium heavy slag as a concrete aggregate not only improves the durability of concrete through its high strength and good chemical stability, but also reduces the risk of concrete shrinkage by reducing cement usage. High-titanium heavy slag has excellent chemical resistance and low thermal conductivity, enabling the shear walls to withstand the erosion of harsh environments during long-term use. In addition, the post-cast concrete layer between the inner and outer wall panels is designed to have a strength no less than that of the precast components, ensuring the uniformity and continuity of the overall structure under load conditions, avoiding structural weaknesses caused by strength differences between different parts, and thus improving the overall seismic performance.

[0017] From the perspective of thermal performance, the wall of the utility model is provided with an insulation layer between the prefabricated inner and outer leaf wall panels, which greatly improves the thermal performance of the building. The insulation layer is composed of high-efficiency insulation materials, and combined with the protective effect of the prefabricated outer leaf wall panels, the integrity of the insulation layer during use is ensured, thereby reducing heat conduction losses. The rough surface designed on the inner side of the prefabricated panel and the surface of the insulation layer increases the adhesion of each layer of material, thereby reducing the thermal conductivity of the wall, which not only improves the insulation effect of the building, but also effectively reduces the energy consumption of the building in winter and summer, and plays a significant energy-saving benefit. This structural design is in line with the development trend of modern green buildings, and improves living comfort through passive insulation means.

[0018] In terms of the environment and resources, this utility model utilizes high-titanium heavy slag, an industrial byproduct, in building materials, achieving resource utilization of waste, promoting the digestion of production capacity in the Panzhihua region, and conforming to the concept of a circular economy. This approach not only significantly reduces carbon emissions during the production process, but also reduces dependence on traditional cement resources, making a positive contribution to alleviating environmental pressures in the construction industry. By reducing cement use, carbon dioxide emissions are reduced, contributing to the sustainable development of the construction industry. This material application method also further enhances the environmental adaptability of buildings, reduces the impact of material mining on the natural ecology, and provides a new path for promoting the development of green buildings.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall top view of the structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the molding structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the truss steel bar of the utility model;

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. Prefabricated inner wall panels, 2. Prefabricated outer wall panels, 3. Connectors, 4. Truss reinforcement, 5. Insulation layer, 401. Upper chord reinforcement, 402. Lower chord reinforcement, 403. Web reinforcement. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1-5 shown

[0031] An assembled high-titanium heavy slag concrete composite shear wall, the shear wall comprising a post-cast concrete layer, an insulation layer 5, and precast reinforced concrete slabs on both sides; the precast reinforced concrete slabs comprise a precast inner leaf wall panel 1 and a precast outer leaf wall panel 2, the precast outer leaf wall panel 2 being fixedly connected to the insulation layer 5, and the precast inner leaf wall panel 1 and the insulation layer 5 being connected via a connector 3;

[0032] A reserved cavity and a truss steel bar 4 are provided between the prefabricated inner leaf wall panel 1 and the insulation layer 5. The reserved cavity is poured to form a post-cast concrete layer. One end of the truss steel bar 4 is connected to the prefabricated inner leaf wall panel 1, and the other end is confined in the post-cast concrete layer.

[0033] Overall stress: The prefabricated outer leaf wall panel 2 does not participate in the superimposed stress, and only serves as one side formwork during construction and an outer protection panel for the insulation layer 5.

[0034] In this embodiment, the wall thickness of the shear wall is 200 mm, the thickness of the prefabricated inner wall panel 1 and the prefabricated outer wall panel 2 are both 50 mm; the thickness of the post-cast concrete layer is 150 mm; the inner side surface of the prefabricated outer wall panel 2, the inner side surface of the prefabricated inner wall panel 1, and both sides of the insulation layer 5 are provided with rough surfaces for improving the bonding strength, and the thickness of the protective layer on the side of the middle cavity of the steel bars in the prefabricated wall panel should not be less than 20 mm.

[0035] In this embodiment, the connecting member 3 is a U-shaped steel plate structure, and the prefabricated outer leaf wall panel 2 and the insulation layer 5 are connected to the prefabricated inner leaf wall panel 1 through the connecting member 3.

[0036] In this embodiment, the truss steel bars 4 are welded together by an upper chord steel bar 401, two lower chord steel bars 402 and connected web steel bars 403. The overall structure is an array-type quadrangular pyramid structure, with multiple groups of truss steel bars 4 arranged in parallel. They are arranged in the composite shear wall to connect the precast reinforced concrete slabs and post-cast concrete layers on both sides. The center spacing of the truss steel bars 4 is 300 mm and is not more than twice the spacing of the vertically distributed steel bars. The horizontal distance between the steel truss and the precast reinforced concrete slabs on both sides is 100 mm.

[0037] Example 2

[0038] like Figure 1-5 shown

[0039] As described in this embodiment Figures 1 to 5 As shown, an assembled high-titanium heavy slag concrete composite shear wall as described in this embodiment is composed of prefabricated reinforced concrete slabs on both sides, post-cast concrete in the middle cavity, and an insulation layer 5; the prefabricated outer leaf wall panel 2 and the insulation layer 5 are connected to the prefabricated inner leaf wall panel 1 through a connector 3, and the prefabricated inner leaf wall panel 1 and the post-cast concrete in the middle cavity are connected through a truss steel bar 4 and are subjected to stress as a whole: the prefabricated outer leaf wall panel 2 does not participate in the composite stress, but only serves as a side formwork during construction and an outer protective plate for the insulation layer 5. The wall thickness of the shear wall is 200mm, and the thickness of the inner and outer leaf prefabricated wall panels is 50mm. The thickness of the post-cast concrete of the composite shear wall is 150mm. The bonding surface between the prefabricated concrete and the post-cast concrete should be set to a rough surface, and the thickness of the protective layer on the side of the steel bars in the prefabricated wall panel located in the middle cavity should not be less than 20mm.

[0040] In this embodiment, regarding the construction process of the prefabricated high-titanium heavy slag concrete composite shear wall described in the above structure, those skilled in the art will appreciate that the inner and outer leaf panels serve as post-cast concrete formwork, and compared to conventional cast-in-place shear walls, this wall can significantly reduce the amount of formwork and on-site pouring, simplify on-site installation compared to conventional prefabricated shear walls connected by sleeve grouting or pre-reserved channel grouting, and reduce production process requirements compared to prefabricated hollow slab shear walls, while also achieving integrated wall insulation and decoration.

[0041] In this embodiment, the above structure describes the construction technology of the assembled high-titanium heavy slag concrete composite shear wall. Those skilled in the art will understand that in the wall insulation technology, the traditional construction method is to apply insulation materials on the outer surface of the concrete wall after the main construction of the building is completed. This method has many problems: 1) The construction process is cumbersome, time-consuming, and wasteful of materials, which increases costs; 2) If improperly handled during construction, phenomena such as the shedding of insulation materials and peeling of the surface layer may occur; 3) At present, the proportion of wall insulation materials that meet fire protection requirements in my country is still relatively small. Advantages of built-in insulation layer in composite shear wall: 1) The insulation layer is arranged inside the wall, which is conducive to saving indoor space. 2) It is conducive to preventing safety accidents caused by external fires. 3) The insulation layer and the wall can achieve a common service life.

[0042] In this embodiment, the material selection of the assembled high-titanium heavy slag concrete composite shear wall described in the above structure. Those skilled in the art will understand that high-titanium heavy slag is loose and porous, has a higher water absorption rate and better volume stability than ordinary crushed stone, and can be used as a building material to replace natural sand and gravel. At the same strength grade, the mechanical properties of concrete prepared from high-titanium heavy slag are almost the same as those of ordinary crushed stone concrete, and its early crack resistance or volume stability are better than ordinary concrete. The researchers conducted comparative tests by trial-mixing ordinary full-high-titanium heavy slag concrete of C10-C55 and comparing it with ordinary concrete, river sand and heavy slag crushed stone under the same design conditions. The results showed that the compressive strength, axial compressive strength and splitting strength of full-high-titanium heavy slag concrete were better than those of the latter two types of concrete.

[0043] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An assembled high-titanium heavy slag concrete composite shear wall, characterized by: The shear wall comprises a post-cast concrete layer, an insulation layer (5) and precast reinforced concrete slabs on both sides; the precast reinforced concrete slabs comprise a precast inner wall panel (1) and a precast outer wall panel (2); the precast outer wall panel (2) and the insulation layer (5) are fixedly connected in affixed manner; the precast inner wall panel (1) and the insulation layer (5) are connected via a connector (3); a reserved cavity and a truss steel bar (4) are provided between the precast inner wall panel (1) and the insulation layer (5); the reserved cavity is cast to form a post-cast concrete layer; one end of the truss steel bar (4) is connected to the precast inner wall panel (1), and the other end is limited in the post-cast concrete layer.

2. The assembled high-titanium heavy slag concrete composite shear wall according to claim 1, characterized in that: The thickness of the shear wall is 200 mm, and the thickness of the prefabricated inner wall panel (1) and the prefabricated outer wall panel (2) are both 50 mm; the thickness of the post-cast concrete layer is 150 mm; the inner side surface of the prefabricated outer wall panel (2), the inner side surface of the prefabricated inner wall panel (1), and both sides of the insulation layer (5) are provided with rough surfaces for improving the bonding strength, and the thickness of the protective layer on the side of the steel bar in the prefabricated wall panel located at the middle cavity should not be less than 20 mm.

3. The assembled high-titanium heavy slag concrete composite shear wall according to claim 1, characterized in that: The connecting piece (3) is a U-shaped steel plate structure, and the prefabricated outer leaf wall panel (2) and the thermal insulation layer (5) are connected to the prefabricated inner leaf wall panel (1) via the connecting piece (3).

4. The assembled high-titanium heavy slag concrete composite shear wall according to claim 1, characterized in that: The truss steel bars (4) are welded together by an upper chord steel bar (401), two lower chord steel bars (402) and connected web steel bars (403). The overall structure is an array-type quadrangular pyramid structure, and multiple groups of truss steel bars (4) are arranged in parallel. The truss steel bars (4) are arranged in the composite shear wall to connect the precast reinforced concrete slabs and the post-cast concrete layer on both sides. The center spacing of the truss steel bars (4) is 300 mm and is not greater than twice the spacing of the vertically distributed steel bars. The horizontal distance between the steel bar trusses and the precast reinforced concrete slabs on both sides is 100 mm.

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