Concrete shear wall with prefabricated steel reinforcement framework and UHPC formwork

Abstract

The utility model provides a concrete shear wall with prefabricated steel reinforcement frameworks and UHPC (Ultra High Performance Concrete) templates, which comprises at least two steel reinforcement frameworks, a steel reinforcement connecting cage for connecting the upper and lower steel reinforcement frameworks, and UHPC plates connected to the peripheries of the steel reinforcement frameworks, concrete is poured between the UHPC plates; the connecting points of the steel reinforcement framework are welded, so that the whole steel reinforcement framework can be independently stressed, and the overall supporting strength is enhanced; the welding of the two edge member reinforcement cages can provide support during the welding of the middle part main body reinforcement cage; uHPC has the advantages of being high in strength, good in durability, good in impermeability and the like, and the problems of cracking, corrosion and the like of the shear wall can be effectively prevented when the UHPC is used as a permanent formwork of the shear wall; meanwhile, the steel reinforcement framework of the concrete shear wall and the UHPC board are manufactured into a whole in a factory prefabrication mode, direct pouring can be achieved only by erecting a side face formwork after site hoisting is conducted in place, and the site construction process is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, and particularly relates to an assembled reinforced concrete shear wall. Background Art

[0002] Shear walls in building structures are often in complex stress conditions under combined bending and shear actions. Therefore, it is necessary to strengthen them. Usually, edge restraint members such as concealed columns or end columns are used to improve the seismic resistance of the shear walls. This results in a large number of steel bar binding points and very complex construction. After the steel bar cage is bound, formwork needs to be supported on site and concrete needs to be poured, resulting in a huge amount of on-site construction work and seriously affecting the construction period. In particular, for walls that need to be constructed in layers, after the steel bar cage of the whole wall is prefabricated in the prefabrication factory, it is inconvenient to transport due to the large size of the whole wall steel bar cage; it is also inconvenient to hoist during construction. At the same time, the overall bearing capacity and ductility of the existing ordinary concrete are relatively low, cracks also occur, and formwork needs to be removed later. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a concrete shear wall with a prefabricated steel bar cage and a UHPC formwork to solve the above problems.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a concrete shear wall with a prefabricated steel bar cage and a UHPC formwork, which includes at least two steel bar cages, and also includes a steel bar connection cage connecting the upper and lower steel bar cages, and a UHPC board connected to the outer periphery of the steel bar cage; concrete is poured between the UHPC boards;

[0006] The steel bar cage includes a main body steel bar cage, a plurality of connecting steel bars, and two edge member steel bar cages; the main body steel bar cage is connected between the two edge member steel bar cages; the connecting steel bars are connected to the main body steel bar cage in a direction perpendicular to the wall surface; the length of the connecting steel bars is greater than the width of the main body steel bar cage, and first connecting segments inserted into the UHPC board are formed by protruding outwards at both ends; all connection points on the steel bar cage are welded;

[0007] The steel bar connection cage includes a plurality of long annular steel bars arranged at intervals transversely, and first transverse bars welded to the middle parts of both sides of the long annular steel bars; when the upper and lower steel bar connection cages are docked through the steel bar connection cage, the long annular steel bars on both sides of the first transverse bar are placed inside the steel bar connection cage, and the end faces of the UHPC boards connecting the upper and lower steel bar connection cages just abut.

[0008] Furthermore, the edge member steel reinforcement cage includes at least four pairs of first longitudinal bars arranged at intervals along the length direction of the wall body, and a plurality of stirrups are longitudinally hoop-welded between two adjacent longitudinal bars.

[0009] Furthermore, the main body steel reinforcement cage includes multiple pairs of second longitudinal bars arranged at intervals along the length direction of the wall body, and second transverse bars longitudinally welded at intervals to the second longitudinal bars; both sides of the second transverse bars are welded to the edge member steel reinforcement cage.

[0010] Furthermore, both ends of the first transverse bar protrude outward to form second connection segments.

[0011] Furthermore, it further includes side formworks connected to both side surfaces of the steel reinforcement framework.

[0012] By adopting the above technical solutions, the following technical effects can be achieved by the present utility model:

[0013] 1. Welding is used for the connection points of the steel reinforcement framework, enabling the entire steel reinforcement framework to be independently stressed;

[0014] 2. The welding of the two edge member steel reinforcement cages can provide support during the welding of the main body steel reinforcement cage in the middle part;

[0015] 3. The arrangement of the connecting steel bars can not only strengthen the integrity of the steel reinforcement framework, but also be embedded in the UHPC slab to better integrate the UHPC slab and the steel reinforcement framework into a whole;

[0016] 4. UHPC has many advantages such as high strength, good durability, and good impermeability. Using it as the permanent formwork of the shear wall can effectively prevent problems such as cracks and corrosion in the shear wall;

[0017] 5. In the form of factory prefabrication, the steel reinforcement framework of the concrete shear wall and the UHPC slab are made into a whole. After hoisting and positioning on-site, only the side formworks need to be set up and then concrete can be directly poured, greatly reducing the on-site construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the edge member steel reinforcement cage of a concrete shear wall with a prefabricated steel reinforcement framework and a UHPC formwork of the present utility model;

[0020] Figure 2It is a schematic diagram after welding the edge member steel reinforcement cage and the main body steel reinforcement cage of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model;

[0021] Figure 3 It is a schematic diagram of the steel reinforcement skeleton after the connection steel bars of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model are welded;

[0022] Figure 4 It is a schematic diagram after the first side UHPC board of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model is poured and assembled;

[0023] Figure 5 It is a schematic diagram after the second side UHPC board of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model is poured and assembled Figure 1 ;

[0024] Figure 6 It is a schematic diagram after the second side UHPC board of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model is poured and assembled Figure 2 ;

[0025] Figure 7 It is a schematic diagram after the side formwork of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model is set up;

[0026] Figure 8 It is a schematic diagram of the connection steel reinforcement cage of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model;

[0027] Figure 9 It is a schematic diagram of the assembly process of the upper and lower steel reinforcement skeletons of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model;

[0028] Figure 10 It is a schematic diagram after the assembly of the upper and lower shear wall steel reinforcement skeletons and formworks of a concrete shear wall with a prefabricated steel reinforcement skeleton and a UHPC formwork of the present utility model is completed.

[0029] Icon: First longitudinal bar 11, stirrup 12, second longitudinal bar 21, second transverse bar 22, connection bar 3, UHPC board 4, side formwork 5, long annular bar 62, first transverse bar 61. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0031] Embodiment

[0032] Combined with Figures 1 to 10 As shown, this embodiment provides a concrete shear wall with a prefabricated steel reinforcement cage and a UHPC formwork, including at least two steel reinforcement cages, a steel bar connection cage connecting the upper and lower steel reinforcement cages, and a UHPC plate 4 connected to the outer periphery of the steel reinforcement cages; concrete is poured between the UHPC plates 4;

[0033] The steel reinforcement cage includes a main steel reinforcement cage, a plurality of connecting steel bars 3, and two edge member steel reinforcement cages; the main steel reinforcement cage is connected between the two edge member steel reinforcement cages; the connecting steel bars 3 are connected to the main steel reinforcement cage in a direction perpendicular to the wall surface; the length of the connecting steel bars 3 is greater than the width of the main steel reinforcement cage, and first connecting segments inserted into the UHPC plate 4 are formed by protruding outward at both ends; welding is used for all connection points on the steel reinforcement cage.

[0034] The steel bar connection cage includes a plurality of long ring-shaped steel bars 62 arranged at intervals in the transverse direction, and first transverse bars 61 welded to the middle parts of both sides of the long ring-shaped steel bars 62; when the upper and lower steel bar connection cages are butted through the steel bar connection cage, the long ring-shaped steel bars 62 on both sides of the first transverse bar 61 are placed inside the steel bar connection cage, and the end faces of the UHPC plates 4 connecting the upper and lower steel bar connection cages just abut.

[0035] The connection points of the steel bar cage are welded so that the entire steel bar cage can bear force independently, strengthening the overall support strength; the welding of the steel bar cages of the two edge members can provide support during the welding of the main steel bar cage in the middle part; and UHPC has many advantages such as high strength, good durability and good impermeability. Using it as the permanent formwork of the shear wall can effectively prevent problems such as cracks and corrosion in the shear wall; at the same time, the steel bar cage of the concrete shear wall and the UHPC plate 4 are made into a whole in the form of factory prefabrication. After the on-site hoisting and positioning, only the side formwork 5 needs to be erected and then the concrete can be directly poured, greatly reducing the on-site construction process.

[0036] Specifically, in this embodiment, as Figure 1 shown, the edge member steel bar cage includes four pairs of first longitudinal bars 11 arranged at intervals along the length direction of the wall, and a plurality of stirrups 12 are longitudinally hooped and welded between the two spaced longitudinal bars; to improve the seismic capacity of the shear wall and at the same time provide support during the welding of the main steel bar cage in the middle part. As Figure 2 [[ID=⑦]]and Figure 3 shown, the main steel bar cage includes multiple pairs of second longitudinal bars 21 arranged at intervals along the length direction of the wall, and second transverse bars 22 longitudinally welded at intervals to the second longitudinal bars 21; both sides of the second transverse bars 22 are welded to the edge member steel bar cage; a plurality of connecting steel bars 3 are welded evenly along the transverse direction of the second transverse bars 22. The arrangement of the connecting steel bars 3 can not only strengthen the integrity of the steel bar cage, but also be embedded in the UHPC plate 4, making the UHPC plate 4 and the steel bar cage better integrated into a whole.

[0037] As Figures 4 to 7 shown, the UHPC plate 4 is assembled and connected to the steel bar cage before initial setting; first, the steel bar cage is hoisted so that one side lies horizontally on the first UHPC plate 4, and the first connecting section on this side is inserted into the first UHPC plate 4; after the first UHPC plate 4 solidifies to reach the required strength, the steel bar cage is hoisted so that the side opposite to the first UHPC plate 4 lies horizontally on the second UHPC plate 4, and the first connecting section on this side is inserted into the second UHPC plate 4. After the second UHPC formwork solidifies to reach the required strength, the prefabrication is completed.

[0038] As Figures 8 to 10As shown in the figure, the steel bar connecting cage includes a plurality of long annular steel bars 62 arranged at intervals in the transverse direction, and first transverse bars 61 welded to the middle parts of both sides of the long annular steel bars 62; when assembling and connecting the steel bar skeletons in the upper and lower parts, the first transverse bars 61 are erected on the uppermost layer of connecting steel bars 3 of the lower steel bar skeleton, and when assembling and connecting, the long annular steel bars 62 are respectively inserted into the upper and lower steel bar skeletons along the longitudinal direction. This ensures the integrity of the upper and lower steel bar skeletons after pouring cement. And through the setting of the steel bar connecting cage, it is avoided that when constructing the upper layer, it is necessary to re-bind and connect the steel bars of the upper and lower layers, realizing the simple connection of the shear walls of the upper and lower layers, greatly facilitating the transportation of the steel bar skeletons of the shear walls, and also facilitating their hoisting during on-site construction.

[0039] Further, if UHPC plates 4 are also used as formwork for formwork support on both sides of the steel bar skeleton, both ends of the first transverse bar 61 protrude outwards to form second connecting segments, and the same second connecting segments are inserted into the UHPC plates 4. Of course, in other embodiments, the side surfaces of the steel bar skeleton can also be supported by side formwork 5 at the construction site. Finally, concrete is poured into the steel bar skeleton in the UHPC plates 4.

[0040] The following specifically describes the construction method of a concrete shear wall of a precast steel bar skeleton and a UHPC formwork, including the following steps:

[0041] S1: Precast the steel bar skeleton and the steel bar connecting cage;

[0042] Weld the longitudinal steel bars and stirrups 12 to form a columnar edge member steel bar cage; weld the longitudinal steel bars, transverse steel bars and connecting steel bars 3 to form a main body steel bar cage; then weld the edge member steel bar cage and the main body steel bars to form a steel bar skeleton;

[0043] Weld the long annular steel bars 62 and the transverse bars to form a steel bar connecting cage;

[0044] S2: Precast the UHPC plates 4;

[0045] S3: Assemble the UHPC plates 4 and the steel bar skeleton by using the horizontal casting method;

[0046] Assemble the precast UHPC plates 4 in step S2 before initial setting; first hoist the precast steel bar skeleton in step S1 so that one side lies horizontally on the first UHPC plate 4, and insert the first connecting segment on this side into the first UHPC plate 4; after the first UHPC plate 4 has solidified to meet the strength requirements, hoist the steel bar skeleton so that the other side opposite to the first UHPC plate 4 lies horizontally on the second UHPC plate 4, and insert the first connecting segment on this side into the second UHPC plate 4. After the second UHPC formwork has solidified to meet the strength requirements, the factory precast stage is completed;

[0047] S4: Formwork is erected on the side of the steel bar framework with the UHPC board 4 assembled in step S3.

[0048] S5: Assemble the upper and lower parts of the precast steel bar framework with the UHPC board 4 in step S4.

[0049] First, hoist the steel bar framework placed at the lower part to the designated construction position, then place the steel bar connecting cage inside the lower steel bar framework so that the first transverse bar 61 is erected on the topmost connecting steel bars 3 of the lower steel bar framework; then hoist the steel bar framework placed at the upper part so that the long annular steel bar 62 on the upper side of the steel bar connecting cage is placed inside the upper steel bar framework, so that the lower end face of the UHPC board 4 of the upper steel bar framework abuts against the upper end face of the UHPC board 4 of the lower steel bar framework.

[0050] S5: Pour concrete into the UHPC board 4.

[0051] It should be noted that if the UHPC board 4 is also used as the formwork for formwork erection on both sides of the steel bar framework, in step S2, after the setting strength of the second UHPC formwork reaches the requirement, continue to assemble the UHPC boards 4 on both sides of the steel bar framework, and at the same time, there is no need to perform the formwork erection on the side of the steel bar framework in step S4.

[0052] At the same time, the steel bar framework of the concrete shear wall and the UHPC board 4 are made into a whole in the form of factory prefabrication. After being hoisted and in place on site, only the side formwork 5 needs to be set up and then concrete can be directly poured, which greatly reduces the on-site construction process, and there is no need to remove the formwork for the UHPC board 4 later, saving time and effort.

[0053] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0056] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A concrete shear wall with a prefabricated steel reinforcement cage and a UHPC formwork, comprising at least two steel reinforcement cages, characterized in that, It further includes a steel bar connecting cage connecting the two steel bar skeletons, and a UHPC plate connected to the outer periphery of the steel bar skeleton; concrete is poured between the UHPC plates; The steel bar skeleton includes a main reinforcement cage, a plurality of connecting steel bars, and two edge member reinforcement cages; the main reinforcement cage is connected between the two edge member reinforcement cages; the connecting steel bars are connected to the main reinforcement cage in a direction perpendicular to the wall surface; the length of the connecting steel bars is greater than the width of the main reinforcement cage, and first connecting segments inserted into the UHPC plate are formed by protruding outward at both ends thereof; welding is used for all connection points on the steel bar skeleton; The steel bar connecting cage includes a plurality of long annular steel bars arranged at intervals in the transverse direction, and first transverse bars welded to the middle parts of both sides of the long annular steel bars; when the upper and lower steel bar connecting cages are butted through the steel bar connecting cage, the long annular steel bars on both sides of the first transverse bar are placed inside the steel bar connecting cage, and the end faces of the UHPC plates connecting the upper and lower steel bar connecting cages just abut.

2. The concrete shear wall of the prefabricated steel bar skeleton and UHPC formwork according to claim 1, characterized in that, The edge member reinforcement cage includes at least four pairs of first longitudinal bars arranged at intervals in the length direction of the wall, and a plurality of stirrups are longitudinally hooped and welded between the two spaced longitudinal bars.

3. The concrete shear wall of the prefabricated steel bar skeleton and UHPC formwork according to claim 2, characterized in that The main reinforcement cage includes a plurality of pairs of second longitudinal bars arranged at intervals in the length direction of the wall, and second transverse bars longitudinally welded at intervals to the second longitudinal bars; both sides of the second transverse bars are welded to the edge member reinforcement cage.

4. The concrete shear wall with a prefabricated steel bar skeleton and a UHPC formwork according to claim 1, wherein Both ends of the first transverse bar protrude outward to form second connecting segments.

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