A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap

Abstract

A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, comprising a prefabricated concrete wall containing vertical holes, connecting steel bars arranged in the vertical holes, and on-site post-cast concrete in the vertical holes. The prefabricated concrete wall is provided with a wall steel bar cage and a shaped pipe, and the shaped pipe is used to form a vertical hole to realize the vertical steel bar overlap connection of the upper and lower walls in the overall shear wall structure. No special hole-making equipment is required, and the fixed mold production line and flat mold assembly line commonly used in prefabricated component factories can be used for flat mold production, avoiding the investment of new fixed equipment; the main force-bearing steel bars of the wall are arranged in the prefabricated concrete wall in the factory, reducing the amount of steel bar binding in on-site construction. After the prefabricated concrete wall is installed on the construction site, connecting steel bars are arranged in the vertical holes, and concrete is poured into the vertical holes to realize the connection of the upper and lower prefabricated concrete walls, which has the advantages of simple installation, convenient connection, and controllable cost.

Description

Technical Field

[0001] The invention belongs to the field of building technology, relates to a prefabricated shear wall, and in particular to a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap. Background Art

[0002] Under the influence of the basic national conditions of a large population and limited land, the residential market user demand orientation, and the need for high seismic fortification, at this stage, my country's prefabricated housing mainly adopts an assembled integral shear wall structure system. The existing assembled integral shear wall structure can be divided into a fully prefabricated shear wall structure and a composite shear wall structure according to the prefabricated wall form it adopts.

[0003] Fully prefabricated shear walls are prefabricated along the wall thickness direction. Vertical reinforcements are usually connected by special reinforcement joints, such as sleeve grouting joints, grout anchor lap joints, etc. The disadvantages are that the positioning accuracy of the reserved reinforcement joints is high, the processing molds are complex, the versatility is poor, the processing efficiency is low, and the cost is relatively high. The vertical reinforcements of composite shear walls are usually connected by indirect reinforcement lap joints without the help of special reinforcement joints. The processing and installation accuracy requirements are low, which can effectively reduce the cost of prefabricated wall connections. However, the existing composite shear wall structure technology system generally has the disadvantages of complex production equipment, high technical barriers, and imperfect on-site supporting construction technology. Some systems are difficult to achieve integrated construction of prefabricated exterior wall structure, insulation, and decoration, which to a certain extent restricts its promotion and application. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, which has the advantages of low installation precision requirements and convenient connection of the existing composite shear wall. At the same time, a fixed pipe is used for one-time casting to form the internal vertical hole, and no special hole-forming equipment is required. The fixed mold production line and flat mold assembly line commonly used in prefabricated component factories can be used for flat mold production, avoiding the investment in new fixed equipment. The prefabricated production links are few and the production efficiency is high, and the integrated construction of prefabricated exterior wall structure, insulation and decoration can be realized.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap comprises a prefabricated concrete wall containing vertical holes, connecting steel bars arranged in the vertical holes and on-site post-cast concrete in the vertical holes. Structurally, the prefabricated hollow composite shear wall includes an edge member part and a wall body part. The vertical reinforcement of the edge member, the vertical distribution reinforcement and the horizontal distribution reinforcement and other stress-bearing reinforcement are all arranged in the prefabricated wall. When making the prefabricated wall, the fixed pipe is fixed to the prefabricated wall reinforcement cage. When pouring concrete, the fixed pipe is used to form a vertical hole that runs up and down along the height direction of the prefabricated wall in the prefabricated wall. After the prefabricated wall is installed at the construction site, the vertical reinforcement of the edge member of the lower prefabricated wall extends into the vertical hole at the position of the edge member of the upper prefabricated wall, and the vertical distribution reinforcement is arranged in the vertical hole at the position of the wall body to additionally connect the reinforcement. After pouring concrete in the vertical hole, the vertical reinforcement of the edge member of the lower prefabricated wall extending into the upper prefabricated wall is additionally connected to the vertical reinforcement of the edge member of the upper prefabricated wall and the vertical distribution reinforcement to achieve overlap connection with the vertical distribution reinforcement in the prefabricated wall. The prefabricated concrete of the prefabricated wall and the post-cast concrete in the vertical hole are superimposed to form an integral shear wall. The use of shaped pipes to form vertical holes can avoid the use of special hole-forming equipment, and the fixed mold production line and flat mold production line commonly used in prefabricated component factories can be used for flat mold production, which has high production efficiency of prefabricated walls.

[0007] In the present invention, the cross-sectional shapes and sizes of the upper and lower parts of the shaped pipe for forming the vertical hole at the edge component position are different; the cross-sectional size of the lower part of the shaped pipe is larger than the upper cross-sectional size, the lower cross-sectional size of the shaped pipe can meet the requirements of the vertical steel bars of the edge component of the lower prefabricated wall in the shear wall structure extending into and overlapping the vertical steel bars of the edge component in the upper prefabricated wall within a certain length range, and the upper cross-sectional size of the shaped pipe meets the requirements of pouring concrete from the upper part of the vertical channel downward at the construction site; the height of the position where the cross-sectional size of the shaped pipe is changed from the bottom surface of the prefabricated wall is not less than the overlapping length of the vertical steel bars of the edge component.

[0008] In the present invention, the vertical steel bars of the edge member are bent within a height range from above the position where the cross-section of the vertical hole of the edge member changes to below the bottom surface of the connecting beam, so as to ensure that the vertical steel bars of the edge member extending from the top of the lower prefabricated wall can extend into the vertical holes of the edge member of the upper prefabricated wall; the vertical steel bars of the edge member are uniformly arranged outside the shaped pipe in the prefabricated wall to facilitate the installation of the shaped pipe; the distance between the vertical steel bars of the edge member and the hole wall of the shaped pipe of the edge member should not be less than 5mm, so as to ensure the installation of the shaped pipe and the efficient installation of the prefabricated wall panels on the construction site; in the overlapping area of ​​the vertical steel bars of the edge member, the center distance of the overlapping vertical steel bars of the edge member should not be greater than 50mm, so as to ensure the force transmission effect of the overlapping steel bars.

[0009] In the present invention, when the vertical steel bars of the edge member extend too long from the top surface of the prefabricated wall and cannot meet the transportation requirements, during the prefabricated wall production stage, the extending length of the vertical steel bars of the edge member can be controlled within a shorter range and extended by using steel bar threaded joints; the steel bar threaded joints are arranged in the horizontal post-casting strip at the top of the prefabricated wall so as not to affect the installation of the upper prefabricated wall.

[0010] In the present invention, the shaped pipes used to form the vertical holes at the wall position can adopt the same cross-sectional shape and size from top to bottom, and a shaped pipe is arranged at the center of every two rows of vertically distributed steel bars to form the vertical hole.

[0011] In the present invention, the vertical distribution steel bars of the prefabricated wall do not extend out of the top and bottom surfaces of the prefabricated wall, and one or two vertical distribution steel bars are arranged at the floor elevation of the vertical hole at each wall position to provide additional connecting steel bars, which are overlapped and connected with the four adjacent vertical distribution steel bars in the prefabricated wall; the length of the additional connecting steel bars should meet the requirements for steel bar overlap, and they are arranged non-continuously along the height direction in the vertical hole, and the total area is not less than the total area of ​​the four vertical distribution steel bars overlapped and connected with them; within the overlap range of the vertical distribution steel bars, the tie bars for connecting the two layers of steel mesh of the prefabricated wall are densely packed, and a tie bar is arranged at the intersection of each vertical distribution steel bar and the horizontal distribution steel bar; when two vertical distribution steel bars are used to provide additional connecting steel bars, transverse steel bars can be welded at the upper and lower ends of the two vertical distribution steel bars to provide additional connecting steel bars to form ladder bars, which is convenient for on-site fixation of the additional connecting steel bars and increases the force transmission performance at the same time.

[0012] In the present invention, the vertical steel bars and vertical distribution steel bars of the edge components in the prefabricated wall are bent inwards at the upper part of the wall to pass through the inner side of the longitudinal bars of the connecting beam, so as to ensure that the longitudinal bars of the connecting beam are arranged in a straight line without bending; the bending angle of the vertical steel bars and vertical distribution steel bars of the edge components should not be greater than 1:6, and the length of the bending section should not be too long, so as to facilitate the arrangement of the stirrups of the edge components; the longitudinal bars at the bottom of the connecting beam are within the anchorage range of the walls on both sides, and tie bars are arranged one by one at the intersection with the vertical steel bars, so as to improve the anchorage performance of the longitudinal bars at the bottom of the connecting beam in the walls on both sides.

[0013] In the present invention, when the wall under the window and the walls on both sides are prefabricated as a whole and the shear resistance verification requirements of the horizontal joints need to be met by laying shear reinforcement, the shear reinforcement is embedded in the lower prefabricated wall connecting beam, and a molded pipe is laid in the upper prefabricated wall under the window to form a vertical hole; after the prefabricated wall is installed on site, the shear reinforcement embedded in the lower connecting beam is extended into the vertical hole of the upper prefabricated wall under the window, and concrete is poured into the vertical hole of the window under the wall to achieve connection; when the shear reinforcement extends out of the top surface of the connecting beam for a long time and cannot meet the transportation requirements, the extension length of the shear reinforcement can be controlled within a shorter range during the prefabricated wall production stage, and the reinforcement threaded joint is used for extension.

[0014] The shaped pipes for forming holes in edge components, the shaped pipes for forming holes in wall positions, and the shaped pipes for forming holes in the wall under windows are all made of metal. The cross-sectional shape of the pipes can be circular, rectangular, or in other forms as needed. The dimensions of the pipes along the wall thickness and wall length should not be less than 70 mm to ensure the pouring quality of the post-cast concrete in the vertical holes.

[0015] The present invention discloses a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap. When the prefabricated wall is installed on site, the horizontal joint at the bottom of the prefabricated wall should be arranged at the floor elevation. To ensure the compactness of the post-cast concrete at the horizontal joint, the distance between the bottom surface of the prefabricated wall and the top surface of the floor slab should not be less than 50 mm. An internal threaded sleeve is embedded in the bottom of the prefabricated wall, and bolts are screwed into the internal threaded sleeve on the construction site. The bolts are used to control the height of the horizontal joint and adjust the horizontality of the prefabricated wall.

[0016] The prefabricated hollow composite shear wall and the wall under the window are provided with a horizontal inner groove at the bottom to ensure that the post-poured concrete is poured densely. The horizontal groove can be formed by template forming or special placeholder blocks. The height of the horizontal inner groove should not be less than 80 mm, and the cross-sectional shape is a trapezoidal cross-section that is narrow at the top and wide at the bottom. The upper bottom width of the trapezoidal cross-section should not be less than 80 mm.

[0017] The vertical holes and vertical steel bar connection structure of the edge component described in the present invention can be used to prefabricate the positions of straight-line, L-shaped and T-shaped edge components. When used for L-shaped and T-shaped edge components, the layout of the shaped pipeline is adjusted according to the range of the edge component and the vertical steel bar layout.

[0018] When horizontal distributed steel bars need to be extended from the side of the prefabricated hollow composite shear wall to connect with the adjacent prefabricated hollow composite shear wall or cast-in-place shear wall, the extended horizontal distributed steel bar structure and the vertical joint structure shall refer to the design specifications such as "Technical Standards for Prefabricated Concrete Buildings" and "Technical Code for Prefabricated Concrete Structures".

[0019] The prefabricated hollow composite shear wall is a structural wall and can be used for the exterior or interior walls of a building. Furthermore, the prefabricated hollow composite shear wall, the insulation layer and the outer leaf wall panel can be prefabricated as a whole in a factory to form a prefabricated sandwich insulation hollow composite shear wall, thereby realizing the integration of prefabricated exterior wall insulation, decoration and structure; the prefabricated hollow composite shear wall and the outer leaf wall panel are fastened with insulation fasteners.

[0020] The present invention discloses a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, and its prefabrication production process includes the following steps: tying the shear wall steel bar skeleton, arranging the shaping pipe in the steel bar skeleton, installing the prefabricated wall side mold and the horizontal inner groove mold, positioning the shaping pipe, pouring concrete to form the internal vertical hole, and curing and forming the demoulding. Furthermore, the prefabricated sandwich insulation hollow composite shear wall can be produced by the positive method or the reverse method, and the construction process of the outer leaf wall board, the insulation layer and the insulation tie piece is added.

[0021] The invention discloses a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, and its on-site construction process comprises the following steps: installing the prefabricated hollow composite shear wall, adjusting the verticality and horizontality of the prefabricated wall, arranging vertical distribution steel bars, additional connecting steel bars and edge component vertical steel bars to extend the steel bars, supporting horizontal joint templates, pouring post-cast concrete in vertical holes to realize prefabricated wall connection, and maintaining and removing the templates.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The vertical steel bars and vertical distribution steel bars of the edge components of the prefabricated wall of the present invention are both overlapped and connected, and the processing and installation precision requirements are low, which can effectively reduce the connection cost of the prefabricated wall and improve the installation efficiency.

[0024] (2) The present invention uses a shaped pipe to cast and form the internal vertical hole in one time, without the need for special hole-forming equipment. It can adopt existing production lines such as fixed mold production lines and flat mold flow production lines that are widely used in domestic prefabricated component factories, thus avoiding the investment in new fixed equipment. The prefabricated hollow composite shear wall is formed in one time, with fewer prefabrication production links and high production efficiency.

[0025] (3) The present invention can add outer leaf wall panels and insulation layers to the prefabricated hollow composite shear wall to form a prefabricated sandwich insulation hollow composite shear wall, thereby realizing the integrated construction of prefabricated exterior wall structure, insulation and decoration, avoiding the shortcomings of other composite shear wall systems that are difficult to achieve integrated construction of structure, insulation and decoration, and at the same time realizing complex facades such as bay windows.

[0026] (4) The vertical distributed steel bars of the prefabricated hollow composite shear wall of the present invention do not extend out of the prefabricated wall, and only the vertical steel bars of the edge components extend out of the top surface of the prefabricated wall, which can achieve mold standardization and universalization, and further reduce the cost of the prefabricated wall.

[0027] (5) The present invention uses a shaped pipe to form a vertical hole, but the shaped pipe has a low cost and avoids the use of a special hole-forming device. The prefabricated wall can be cast and formed in one time, which can effectively control the comprehensive cost of the prefabricated wall.

[0028] (6) The prefabricated hollow composite shear wall of the present invention has a light weight, and the vertical steel bars are all connected by overlapping, which has a high on-site installation efficiency. The vertical steel bars of the upper and lower prefabricated walls are connected by pouring concrete in the vertical holes at the same time. The joint quality is controllable and the construction process is reduced, which can avoid the incremental cost of the traditional prefabricated wall sleeve grouting joint.

[0029] (7) The present invention connects the prefabricated wall and the horizontal post-cast strip into a whole by post-casting concrete in the vertical hole, and the structure has good integrity. The design method of the cast-in-place shear wall structure can be adopted, which is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional schematic diagram of a prefabricated hollow composite shear wall I-shaped edge component based on flat mold production and steel bar overlap of the present invention, in which a single large-sized shaped pipe is used to form a single vertical hole. The figure also schematically shows the vertical distribution steel bars and additional connecting steel bars.

[0031] Figure 2 for Figure 1 Front view of the precast hollow composite shear wall shown.

[0032] Figure 3 for Figure 2 Schematic diagram of cross sections 1-1, 2-2 and 3-3.

[0033] Figure 4 for Figure 2 Schematic diagram of AA, BB, CC and DD cross sections.

[0034] Figure 5 for Figure 1 3D schematic of the large sized shaped pipe used in the mid-edge component location.

[0035] Figure 6 for Figure 1 3D schematic diagram of the shaped pipe used for connecting the vertically distributed reinforcement in the middle wall.

[0036] Figure 7 for Figure 1 Top view of the cross-section of the I-shaped prefabricated edge component.

[0037] Figure 8 For L-shaped prefabricated edge components Figure 5 A top cross-sectional view of a large size shaped pipe is shown.

[0038] Fig. 9 For T-shaped prefabricated edge components Figure 5 A top cross-sectional view of a large size shaped pipe is shown.

[0039] Fig.10 It is a schematic diagram of the structure of the vertical steel bar overlap connection and the horizontal joints of the upper and lower prefabricated wall edge components in the prefabricated hollow composite shear wall structure of the present invention.

[0040] Fig.11 The present invention is a schematic diagram of the structure in which the vertical distribution steel bars of the upper and lower prefabricated walls in the prefabricated hollow composite shear wall structure are overlapped and connected by a single additional connecting steel bar and four adjacent vertical distribution steel bars.

[0041] Fig.12 The present invention is a schematic diagram of the structure in which the vertical distribution steel bars of the upper and lower prefabricated walls in the prefabricated hollow composite shear wall structure are overlapped and connected with four adjacent vertical distribution steel bars by two additional connecting steel bars.

[0042] Fig.13 The present invention is a schematic diagram of the structure of arranging shear reinforcement bars at the wall below the window in the prefabricated hollow composite shear wall structure of the present invention.

[0043] Fig.14 This is a three-dimensional schematic diagram of a prefabricated hollow composite shear wall I-shaped edge component based on flat mold production and steel bar overlap of the present invention, in which two vertical holes are formed by two small-sized shaped pipes. The figure also schematically shows the vertical distribution steel bars and additional connecting steel bars.

[0044] Fig.15 for Fig.14 Front view of the precast hollow composite shear wall shown.

[0045] Fig.16 for Fig.14 Schematic diagram of cross sections 1-1, 2-2 and 3-3.

[0046] Fig.17 for Fig.14 3D schematic of two small-sized shaped pipes used in the mid-edge component locations.

[0047] Fig.18 for Fig.14 Top view of the cross-section of the I-shaped prefabricated edge component.

[0048] Fig.19 The top view of the section shows a straight-line prefabricated edge component with a large vertical reinforcement ratio and 8 vertical reinforcements for the edge component.

[0049] Fig. 20 For L-shaped prefabricated edge components Fig.17 A top cross-sectional view of a small size shaped pipe is shown.

[0050] Fig.21 For T-shaped precast edge components Fig.17 A top cross-sectional view of a small size shaped pipe is shown.

[0051] Fig. 22 For T-shaped prefabricated restrained edge components Fig.17 A top cross-sectional view of a small size shaped pipe is shown.

[0052] Fig.23 for Figure 1 The three-dimensional schematic diagram of the improved type of prefabricated hollow composite shear wall with integrated insulation, decoration and structure, i.e., prefabricated sandwich insulation hollow composite shear wall.

[0053] In the figure: 1-edge member area; 2-wall area; 3-window lower wall area; 4-connecting beam area; 5-door opening; 6-window opening; 11-shaped pipe for edge member hole forming; 111-lower pipe of shaped pipe for edge member hole forming; 112-upper pipe of shaped pipe for edge member hole forming; 113-casting hole on lower pipe of shaped pipe for edge member hole forming; 12-vertical steel bars of edge member; 121-extending steel bars of vertical steel bars of edge member; 122-threaded joint for extending vertical steel bars of edge member; 13-stirrups of edge member; 14-tension bars of edge member; 21-shaped pipe for wall hole forming; 22-horizontal inner groove at the bottom of wall position; 23-vertical distribution steel bars; 24-vertical distribution Additional connecting steel bars; 241- transverse steel bars of additional connecting steel bars for vertical distribution steel bars; 25- tie bars in the overlapping area of ​​vertical distribution steel bars; 26- embedded internal threaded sleeves for leveling precast walls; 31- shaped pipes for making holes in the wall under the window; 32- horizontal inner groove at the bottom of the wall under the window; 33- shear steel bars in the joints at the wall under the window; 331- threaded joints for extending the shear steel bars in the joints at the wall under the window; 41- longitudinal bars at the bottom of the connecting beam; 42- tie bars in the anchoring area of ​​the longitudinal bars at the bottom of the connecting beam; 43- stirrups for the connecting beam; 44- longitudinal bars at the top of the connecting beam; 71- horizontal joints at the bottom of the precast wall; 72- horizontal post-cast strips at the top of the precast wall; 73- precast floor slabs; 81- precast hollow composite shear walls; 82- insulation layer; 83- outer leaf wall panels. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are described in detail below with reference to the accompanying drawings and examples.

[0055] refer to Figure 1-Figure 23 A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, wherein edge component vertical steel bars 12 and edge component hole-forming shaped pipes 11 are arranged in the edge component area 1 of the shear wall structure, and wall body vertical distribution steel bars 23 and wall body hole-forming shaped pipes 21 are arranged in the wall body area 2, and the edge component vertical steel bars 12 and the wall body vertical distribution steel bars 23 are arranged outside the edge component hole-forming shaped pipes 11 and the wall body hole-forming shaped pipes 21 in the prefabricated wall, characterized in that the edge component vertical steel bars 12 and the wall body vertical distribution steel bars 23 of the upper and lower prefabricated walls are both overlapped; wherein the lower prefabricated wall The edge member vertical steel bars 12 shrink upward and extend out from the top surface, and the extended extension steel bars 121 are in the lower pipe 111 of the edge member hole-forming shaped pipe 11 of the upper prefabricated wall, and are overlapped and connected one-to-one with the edge member vertical steel bars 12 outside the lower pipe 111 in the upper prefabricated wall; the wall body vertical distribution steel bars 23 do not extend out of the top or bottom surface of the prefabricated wall, and one or two vertical additional vertical connecting steel bars 24 are arranged near the floor elevation in the wall body hole-forming shaped pipe 21, and the vertical additional connecting steel bars 24 are overlapped and connected with the four adjacent wall body vertical distribution steel bars 23 outside the wall body hole-forming shaped pipe 21 where they are located.

[0056] In the present invention, in the prefabricated wall production stage, a shaped pipe 11 for forming holes in edge components and a shaped pipe 21 for forming holes in the wall body are used to form vertical holes in the edge components and vertical holes in the wall body respectively. The vertical holes are arranged along the height direction of the prefabricated wall. After the shaped pipes, vertical steel bars and steel cages are arranged, concrete is poured into the vertical holes to complete the overlapping connection of the vertical steel bars 12 of the edge components and the vertical distribution steel bars 23. The prefabricated wall is cast and formed in one time using a fixed mold production line or a flat mold assembly line.

[0057] In the present invention, a shaped pipe 21 for forming holes in the wall is arranged at the center position of every two rows of vertical distributed steel bars 23 in the wall body. The shaped pipe 21 for forming holes in the wall body adopts the same cross-sectional shape and size from top to bottom. When two additional connecting steel bars 24 are used, transverse steel bars 241 are welded at the upper and lower ends of the two additional connecting steel bars 24 to form ladder bars, which is convenient for on-site fixation of the additional connecting steel bars 24 and increases the force transmission performance at the same time; the shaped pipe 11 for forming holes in the edge component is composed of a lower pipe 111 and an upper pipe 112. The two pipes are manufactured separately and then assembled into shape. The cross-section of the lower pipe 111 is larger than that of the upper pipe 112, so that the extension steel bars 121 of the lower prefabricated wall can extend into the lower pipe 111 of the upper prefabricated wall, and realize a one-to-one overlap connection with the vertical steel bars 12 of the edge component outside the lower pipe 111 of the upper prefabricated wall.

[0058] In the present invention, the prefabricated edge member is L-shaped, T-shaped or straight. For the straight edge member, when the calculated reinforcement area of ​​the vertical steel bars of the straight edge member is less than a certain value, a single large-sized edge member hole-forming forming pipe 11 forms a large-sized edge member vertical hole. When the calculated reinforcement area of ​​the vertical steel bars of the straight edge member is greater than a certain value, two small-sized edge member hole-forming forming pipes 11 are used to form two small-sized edge member vertical holes, and the elongated steel bars 121 are overlapped and connected with the edge member vertical steel bars 12 inside and outside the vertical hole, and 8 edge member vertical steel bars 12 are arranged in the edge member to control its diameter, thereby being used for prefabricated edge members with a large reinforcement ratio of the edge member vertical steel bars 12; the upper pipe 112 of the large-sized and small-sized edge member hole-forming forming pipes 11 is consistent in form.

[0059] In the present invention, the vertical steel bars 12 of the edge member are overlapped within the height range of the lower pipe 111, and the length of the lower pipe 111 is not less than the overlap length of the vertical steel bars 12 of the edge member; the lower pipe 111 of the large-sized edge member hole-forming shaping pipe 11 adopts a rectangular cross-section, which covers or basically covers the entire I-shaped edge member cross-section, and the rectangular tube is bent in the middle position along the length direction of the edge member to form a protrusion, avoiding the middle vertical steel bars 12 of the edge member, and at the same time forming a stiffening effect to improve the rigidity of the lower pipe 111, and pouring holes 113 are arranged along the lower pipe 111 to ensure the pouring quality of concrete below the lower pipe 111 during flat mold production, and the minimum size of the pouring holes 113 is not less than 70mm; the lower pipe 111 of the small-sized edge member hole-forming shaping pipe 11 adopts a rectangular cross-section, and the four corners are bent to form cut corners to avoid the vertical steel bars 12 of the edge member, and the gap between the two lower pipes 111 on the I-shaped edge member is convenient for the lower concrete pouring and the reinforcement layout.

[0060] In the present invention, the edge member vertical steel bars 12 and the wall body vertical distribution steel bars 23 in the prefabricated wall are bent inwards at the upper part of the wall to pass through the inner side of the longitudinal bars 41 at the bottom of the connecting beam, ensuring that the longitudinal bars 41 at the bottom of the connecting beam are arranged in a straight line without bending; the bending angles of the edge member vertical steel bars 12 and the wall body vertical distribution steel bars 23 are not greater than 1:6, and the distance between the edge member vertical steel bars 12 and the hole wall of the edge member hole forming shaped pipe 11 is not less than 5mm, ensuring the installation of the edge member hole forming shaped pipe 11 and the efficient installation of the prefabricated wall panels at the construction site; in the overlapping area of ​​the edge member vertical steel bars 12, the center distance between the overlapping edge member vertical steel bars 12 and the extended steel bars 121 is not greater than 50mm, ensuring the force transmission effect of the steel bar overlap, and the prefabricated wall steel cage is relatively independent of each shaped pipe to facilitate the installation of each shaped pipe.

[0061] In the prefabricated wall of the present invention, the wall under the window 3 is integrally prefabricated with the walls on both sides. If shear steel bars 33 need to be arranged in the structural design to meet the shear calculation requirements of the horizontal joints, the shear steel bars 33 are pre-embedded in the connecting beam 4 of the lower prefabricated wall, and a shaped pipe 31 for forming a hole in the wall under the window is arranged in the upper prefabricated wall 3 under the window to form a vertical hole; the shaped pipe 31 for forming a hole in the wall under the window runs through the entire wall under the window 3 from top to bottom, the shaped pipe 11 for forming a hole in the edge member, the shaped pipe 21 for forming a hole in the wall body and the shaped pipe 31 for forming a hole in the wall under the window are all made of metal, and are made by folding a thin-walled steel plate with patterns or protrusions on the surface, and the cross-section is circular or rectangular. If it is a circular cross-section, a metal corrugated pipe is used; the dimensions of each shaped pipe along the wall thickness and the wall length direction are not less than 70 mm to ensure the pouring quality of the post-cast concrete in the vertical hole.

[0062] In the present invention, during the prefabricated wall production stage, the edge member vertical steel bars 12 and the shear steel bars 33 are directly extended from the top surface of the prefabricated wall to the length required by the design and are controlled within the range that meets the transportation requirements. At the construction site, the edge member vertical steel bar extension threaded joint 122 and the window lower wall joint shear steel bar extension threaded joint 331 are connected to the extension steel bars for extension to meet the corresponding design length requirements; the edge member vertical steel bar extension threaded joint 122 is arranged at the top of the prefabricated wall horizontally and then The casting strip 72 is within the range so as not to affect the installation of the upper prefabricated wall; when the prefabricated wall is installed on site, the horizontal joint 71 at the bottom of the prefabricated wall is set at the floor elevation. In order to ensure the compactness of the post-cast concrete at the horizontal joint 71 at the bottom of the prefabricated wall, the distance between the bottom surface of the prefabricated wall and the top surface of the floor slab is not less than 50mm; at least two internal threaded sleeves 26 are embedded in the bottom of the prefabricated wall, and bolts are screwed into the internal threaded sleeves 26 at the construction site. The height of the horizontal joint 71 at the bottom of the prefabricated wall is controlled by the bolts to adjust the horizontality of the prefabricated wall.

[0063] In the present invention, in order to ensure the compactness of the post-cast concrete at the horizontal joint between the shaped pipe 21 for forming holes in the wall body and the shaped pipe 31 for forming holes in the wall under the window, a horizontal inner groove 1 22 is arranged at the bottom of the wall body, and a horizontal inner groove 2 32 is arranged at the bottom of the wall area 3 under the window. The horizontal inner groove 1 22 and the horizontal inner groove 2 32 are formed by template molding or special placeholder blocks; the height of the horizontal inner groove 1 22 and the horizontal inner groove 2 32 is not less than 80 mm, and the cross-sectional shape is a trapezoidal cross-section that is narrow at the top and wide at the bottom, and the upper bottom width of the trapezoidal cross-section is not less than 80 mm.

[0064] In the present invention, the prefabricated hollow composite shear wall 81, the insulation layer 82 and the outer leaf wall panel 83 are prefabricated as a whole in the factory to form a prefabricated sandwich insulation hollow composite shear wall, so as to realize the integration of prefabricated exterior wall insulation, decoration and structure; the prefabricated hollow composite shear wall 81 and the outer leaf wall panel 83 are fastened with insulation anchors; the prefabricated sandwich insulation hollow composite shear wall 81 is produced by the forward or reverse method, and the construction steps of the outer leaf wall panel 83, the insulation layer 82 and the insulation anchors are added.

[0065] The following are two preferred embodiments of the present invention.

[0066] Embodiment 1

[0067] like Figure 1 to Figure 7As shown, in this embodiment, the prefabricated hollow composite shear wall includes an edge component area 1, a wall area 2, a wall area under the window 3, a connecting beam area 4, a door opening 5 and a window opening 6. It should be noted that the edge component area 1 and the wall area 2 can be independently used for the prefabricated hollow composite shear wall based on flat mold production and steel bar overlap of the present invention. The specific embodiment includes the wall area under the window 3, the connecting beam area 4, the door opening 5 and the window opening 6 to more comprehensively illustrate the scheme of the present invention, but it does not mean that the prefabricated hollow composite shear wall based on flat mold production and steel bar overlap of the present invention must be used for the prefabricated shear wall containing the wall area under the window 3, the connecting beam area 4, the door opening 5 and the window opening 6.

[0068] Taking into account the advantages and disadvantages of the existing prefabricated shear wall technology system, the prefabricated edge component vertical steel bars 12 and the wall body vertical distribution steel bars 23 of the prefabricated hollow composite shear wall of the present invention are all overlapped, which is a composite shear wall technology system. The existing composite shear wall technology systems all use secondary molding or special hole-forming equipment to form the internal hollow part to achieve vertical steel bar overlap connection. The disadvantages are that the prefabricated wall production process is complicated, the special hole-forming equipment has a large fixed asset investment and high technical difficulty. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap of the present invention uses a shaped pipe to form an internal vertical hole to achieve the overlap connection of the prefabricated edge component vertical steel bars 12 and the wall body vertical distribution steel bars 23. The prefabricated wall can be formed at one time without the use of special hole-forming equipment. The prefabricated hollow composite shear wall of the present invention can be produced on the fixed mold production line and flat mold assembly line commonly used in prefabricated component factories.

[0069] In this embodiment, a straight-line edge member is used, and a large-sized edge member hole-forming forming pipe 11 is used in the edge member area 1 to form a vertical hole in the edge member. The edge member hole-forming forming pipe 11 is composed of two parts: a lower pipe 111 and an upper pipe 112. The cross-sectional dimension of the lower pipe 111 is relatively large, and it basically covers the entire cross-sectional dimension of the straight-line edge member. The extended steel bars 121 of the vertical steel bars 12 of the prefabricated edge member of the lower prefabricated wall and the vertical steel bars 12 of the edge member of the upper prefabricated wall are overlapped and connected within the scope of the lower pipe 111. The length of the lower pipe 111 should not be less than the overlap length of the vertical steel bars 12 of the edge member. The cross-sectional dimension of the lower pipe 111 can be a rectangular cross-sectional dimension, and the rectangular pipe is bent in the middle position along the length direction of the edge member to form a protrusion, avoiding the vertical steel bars of the edge member in the middle. 12. At the same time, a reinforcing effect is formed on the lower pipe 111 to improve the pipe rigidity and control the deformation of the lower pipe 111 when pouring concrete in the prefabricated wall production stage; pouring holes 113 are arranged along the lower pipe 111 to ensure the pouring quality of the lower concrete of the pipe 111 during flat mold production. The pouring holes 113 can be circular or rectangular in cross-section, and the minimum size should not be less than 70mm; the lower pipe 111 can be made of a thin-walled steel plate with patterns or protrusions on the surface, and a rough surface is formed at the junction of the concrete and the pipe wall to ensure the force transmission performance.

[0070] The upper pipe 112 is used to pour concrete from the upper part of the vertical hole downward at the construction site. It must meet the requirements for concrete pouring and can be made of metal corrugated pipes or thin-walled steel plates. In this embodiment, the cross-section of the upper pipe 112 is circular, and a rectangular or other cross-section can also be used. The thickness and length dimensions of the lower pipe 111 and the upper pipe 112 along the edge components should not be less than 70 mm. The pouring hole 113 on the lower pipe 111 should be arranged on the side away from the upper pipe 112 to facilitate the vibration of the post-poured concrete in the vertical hole and ensure the pouring quality. The lower pipe 111 and the upper pipe 112 are made separately and finally assembled into a whole.

[0071] The vertical reinforcement 12 of the edge member is bent within the height range from the top of the lower pipe 111 to below the bottom surface of the connecting beam, such as Figure 7 As shown, the vertical steel bars 12 are bent into the edge member to the position of the extension steel bars 121 to ensure that the extension steel bars 121 extending from the top of the prefabricated wall can extend into the lower pipe 111 of the upper prefabricated wall edge member and overlap and connect with the vertical steel bars 12 of the upper prefabricated wall edge member; the vertical steel bars 12 of the edge member are uniformly arranged outside the shaped pipe 11 in the prefabricated wall to ensure that the prefabricated wall steel cage and the shaped pipe 11 are relatively independent to facilitate the installation of the shaped pipe 11; the distance between the vertical steel bars 12 of the edge member and the hole wall of the shaped pipe 11 should not be less than 5mm to ensure the installation of the shaped pipe 11 and the efficient installation of the prefabricated wall panels at the construction site; in the overlapping area of ​​the vertical steel bars of the edge member, the center distance between the overlapping vertical steel bars 12 of the edge member and the extension steel bars 121 should not be greater than 50mm to ensure the force transmission effect of the steel bar overlap.

[0072] The vertical steel bars 12 of the edge member can be directly extended from the top surface of the prefabricated wall to a length that meets the requirements of steel bar overlap. When the vertical steel bars 12 of the edge member extend from the top surface of the prefabricated wall for a long time and cannot meet the transportation requirements, during the prefabricated wall production stage, the vertical steel bars 12 of the edge member can be controlled to extend within a relatively short range, and the steel bar threaded joint 122 is connected to the extension steel bar 121 for extension at the construction site; Fig.10 As shown, the steel bar threaded joint 122 should be arranged within the horizontal post-cast strip 72 at the top of the prefabricated wall so as not to affect the installation of the upper prefabricated wall.

[0073] The vertical holes at the wall position are formed by a shaped pipe 21 for forming holes in the wall. The shaped pipe 21 for forming holes in the wall can adopt the same cross-sectional shape and size from top to bottom. In this embodiment, the cross-section of the shaped pipe 21 for forming holes in the wall is circular, and a rectangular or other cross-sectional shape can also be adopted. The dimensions along the thickness and length directions of the prefabricated wall should not be less than 70 mm. It can be made by folding a metal corrugated pipe or a thin-walled steel plate with protrusions on the surface; a shaped pipe 21 for forming holes in the wall is arranged at the center of every two rows of vertically distributed steel bars to form a vertical hole.

[0074] The vertical distribution steel bars 23 of the prefabricated wall do not extend out of the top and bottom surfaces of the prefabricated wall. Fig.11 As shown, an additional connecting steel bar 24 is arranged near the floor elevation of the vertical hole of the wall body forming shaped pipe 21, and is overlapped and connected with four adjacent vertical distribution steel bars 23 in the prefabricated wall; within the overlap range of the vertical distribution steel bars, the tie bars 25 that tie the two layers of steel mesh of the prefabricated wall are densely packed, and a tie bar 25 is arranged at the intersection of each vertical distribution steel bar 23 and the horizontal distribution steel bar. In addition, as Fig.12 As shown, two additional connecting steel bars 24 are arranged near the floor elevation of the vertical hole of the wall body forming shaped pipe 21, and overlapped and connected with the four adjacent vertical distribution steel bars 23 in the prefabricated wall; transverse steel bars 241 can be welded at the upper and lower ends of the two additional connecting steel bars 24 to form ladder bars, which is convenient for on-site fixing of the additional connecting steel bars 24 and improves the force transmission performance. Regardless of whether one or two additional connecting steel bars 24 are used, the total area of ​​the additional connecting steel bars 24 in the vertical hole of a single wall body forming shaped pipe 21 is not less than the total area of ​​the four vertical distribution steel bars 23 overlapped and connected with it.

[0075] like Figure 4 As shown, the vertical steel bars 12 and the vertical distribution steel bars 23 of the edge components in the prefabricated wall are bent at the upper part of the wall to pass through the inner side of the longitudinal bars 41 at the bottom of the connecting beam, ensuring that the longitudinal bars 41 at the bottom of the connecting beam are arranged in a straight line without bending. The bending angle of the vertical steel bars 12 and the vertical distribution steel bars 23 of the edge components should not be greater than 1:6, and the length of the bending section should be controlled to facilitate the arrangement of the stirrups of the edge components. The longitudinal bars 41 at the bottom of the connecting beam are arranged one by one at the intersection with the vertical steel bars within the anchorage range of the walls on both sides, so as to improve the anchorage performance of the longitudinal bars 41 at the bottom of the connecting beam in the walls on both sides.

[0076] In the assembled shear wall structure, the wall area 3 under the window is mostly prefabricated as a whole with the walls on both sides. If shear reinforcement 33 needs to be arranged in the structural design to meet the shear calculation requirements of the horizontal joint, the shear reinforcement 33 is embedded in the lower prefabricated wall connecting beam 4, and a shaped pipe 31 for forming a hole in the wall under the window is arranged in the wall area 3 under the window of the upper prefabricated wall to form a vertical hole. The shaped pipe 31 for forming a hole in the wall under the window runs through the entire wall under the window from top to bottom. In this embodiment, the cross section of the shaped pipe 31 for forming a hole in the wall under the window is circular, and a rectangular or other cross section can also be used. The size along the thickness and length direction of the prefabricated wall should not be less than 70 mm, and it can be made of a metal corrugated pipe or a thin-walled steel plate with protrusions on the surface.

[0077] like Fig.13As shown, after the prefabricated wall is installed on site, the shear steel bars 33 embedded in the lower layer connecting beam extend into the shaped pipe 31 for forming the hole in the window lower wall of the upper layer prefabricated wall, and the connection is realized by pouring concrete in the vertical hole of the window lower wall. Similar to the vertical steel bars 12 of the edge member, the extension length of the shear steel bars 33 from the top surface of the connecting beam 4 can be controlled within a relatively short range, and the steel bar threaded joint 331 is used to connect with the extension steel bar for extension at the construction site.

[0078] like Figure 10 to Figure 13 As shown, when the prefabricated wall is installed on site, the horizontal joint 71 at the bottom of the prefabricated wall should be set at the floor elevation. To ensure the compactness of the post-cast concrete at the horizontal joint 71, the distance between the bottom surface of the prefabricated wall and the top surface of the floor slab should not be less than 50 mm. At least two internal threaded sleeves 26 are embedded at the bottom of the prefabricated wall. Bolts are screwed into the internal threaded sleeves 26 at the construction site to control the height of the horizontal joint 71 and adjust the horizontality of the prefabricated wall.

[0079] In particular, the spacing between the shaped pipes 21 for forming holes in the wall and the shaped pipes 31 for forming holes in the wall below the window is relatively large. In order to ensure the compactness of the post-cast concrete at the horizontal joints at the above positions, a horizontal inner groove 1 22 and a horizontal inner groove 2 32 are set at the bottom of the wall and the wall below the window. The horizontal inner groove 1 22 and the horizontal inner groove 2 32 can be formed by template molding or special placeholders. The height of the horizontal inner groove 1 22 and the horizontal inner groove 2 32 should not be less than 80 mm, and the cross-sectional shape is a trapezoidal cross-section that is narrow at the top and wide at the bottom. The width of the upper bottom of the trapezoidal cross-section should not be less than 80 mm.

[0080] When horizontal distributed steel bars need to be extended from the side of the prefabricated hollow composite shear wall to connect with the adjacent prefabricated hollow composite shear wall or cast-in-place shear wall, the extended horizontal distributed steel bar structure and vertical joint structure shall refer to the design specifications such as "Technical Standards for Prefabricated Concrete Buildings" and "Technical Code for Prefabricated Concrete Structures".

[0081] Furthermore, if Figure 8 , Fig. 9 As shown, when the prefabricated wall includes L-shaped and T-shaped edge components, large-sized fixed pipes 11 can also be used to form vertical holes at the positions of the L-shaped and T-shaped prefabricated edge components to achieve overlapping connection of the vertical steel bars of the upper and lower layers of the L-shaped and T-shaped prefabricated edge components. The arrangement of the fixed pipes 11 can be adjusted according to the range of the edge components and the arrangement of the vertical steel bars.

[0082] The prefabrication production process of the prefabricated hollow composite shear wall of the preferred embodiment includes the following steps: tying the shear wall steel frame, arranging the shaping pipe in the steel frame, installing the prefabricated wall side mold and the horizontal inner groove mold, positioning the shaping pipe, pouring concrete to form the internal vertical hole, and curing and molding. Its on-site construction process includes the following steps: installing the prefabricated hollow composite shear wall, adjusting the verticality and horizontality of the prefabricated wall, arranging the vertical distribution steel bar additional connecting steel bar 24 or the edge member vertical steel bar extension steel bar 121, supporting the horizontal joint template, pouring the post-cast concrete in the vertical hole to realize the prefabricated wall connection, and curing and demolding.

[0083] Embodiment 2

[0084] Figures 14 to 18 The second embodiment of the present invention is shown. The difference between the second embodiment and the first embodiment is that two small-sized edge component hole forming forming pipes 11 are used at the edge component position to form two vertical holes, so as to realize the overlap connection of the vertical reinforcements of the upper and lower edge components. The advantage is that during flat mold production, the gap between the two small-sized edge component hole forming forming pipes 11 is more helpful to ensure the pouring quality of the lower concrete and facilitate the arrangement of the edge component reinforcement 14. A single small-sized edge component hole forming forming pipe 11 is also composed of a lower pipe 111 and an upper pipe 112. The length of the lower pipe 111 should not be less than the overlap length of the vertical reinforcements of the edge component, and the cross section adopts a rectangular cross section, and the four corners are bent to form cut corners to avoid the vertical reinforcements 12 of the edge component; the lower pipe 111 can be made by rolling a thin-walled steel plate with patterns or protrusions on the surface, forming a rough surface at the junction of the concrete and the pipe wall to ensure the force transmission performance.

[0085] The upper pipe 112 is used to pour concrete from the upper part of the vertical hole downward at the construction site. It must meet the requirements for concrete pouring and can be made of metal corrugated pipes or thin-walled steel plates. In the preferred embodiment 2, the cross-section of the upper pipe 112 is circular, and a rectangular or other cross-section can also be used. The thickness and length dimensions of the lower pipe 111 and the upper pipe 112 along the edge components should not be less than 70 mm to facilitate the vibration of the post-poured concrete in the vertical hole and ensure the pouring quality. The lower pipe 111 and the upper pipe 112 are made separately and finally assembled into a whole.

[0086] In particular, when the vertical reinforcement ratio of the edge member is large, configuring six vertical reinforcements 12 of the edge member will result in a larger diameter of the vertical reinforcements 12 of the edge, which is not conducive to the overlap force transmission and the overlap length is longer. Fig.19 Eight vertical steel bars 12 are arranged in the edge member to reduce the diameter of the vertical steel bars of the edge member, thereby reducing the lap length and the amount of steel bars used.

[0087] Furthermore, if Figure 20 to Figure 22As shown, the small-sized edge component hole forming forming pipe 11 can also be used for L-shaped and T-shaped prefabricated edge components. The arrangement of the small-sized edge component hole forming forming pipe 11 can be adjusted according to the range of the L-shaped prefabricated edge component, the T-shaped prefabricated structural edge component and the T-shaped prefabricated constrained edge component and the vertical reinforcement arrangement.

[0088] The prefabricated hollow composite shear wall in the first or second embodiment of the present invention is a structural wall and can be used for the exterior wall or interior wall of a building. Fig.23 As shown, the prefabricated hollow composite shear wall 81, the insulation layer 82 and the outer leaf wall panel 83 can be prefabricated as a whole in the factory to form a prefabricated sandwich insulation hollow composite shear wall, realizing the integration of prefabricated exterior wall insulation, decoration and structure. The prefabricated hollow composite shear wall and the outer leaf wall panel are tied with insulation tie pieces. At this time, the prefabricated sandwich insulation hollow composite shear wall can be produced by the forward method or the reverse method, adding the construction process of the outer leaf wall panel, the insulation layer and the insulation tie pieces.

[0089] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap, wherein edge component vertical steel bars (12) and edge component hole-forming shaped pipes (11) are arranged in the edge component area (1) of the shear wall structure, and wall body vertical distribution steel bars (23) and wall body hole-forming shaped pipes (21) are arranged in the wall body area (2), the edge component vertical steel bars (12) and the wall body vertical distribution steel bars (23) are arranged outside the edge component hole-forming shaped pipes (11) and the wall body hole-forming shaped pipes (21) in the prefabricated wall, characterized in that: The vertical reinforcement bars (12) of the edge components of the upper and lower prefabricated walls and the vertical distribution reinforcement bars (23) of the wall body are both overlapped and connected; the vertical reinforcement bars (12) of the edge components of the lower prefabricated wall are contracted upward and extended from the top surface, and the extended extension reinforcement bars (121) are overlapped and connected one-to-one with the vertical reinforcement bars (12) of the edge components outside the lower pipe (111) of the upper prefabricated wall in the lower pipe (111) of the edge component hole-forming shaped pipe (11); the vertical distribution reinforcement bars (23) of the wall body do not extend out of the top or bottom surface of the prefabricated wall, and one or two vertical additional connection reinforcement bars (24) are arranged near the floor elevation in the wall body hole-forming shaped pipe (21), and the vertical additional connection reinforcement bars (24) are overlapped and connected with four adjacent vertical distribution reinforcement bars (23) of the wall body outside the wall body hole-forming shaped pipe (21) where they are located; In the prefabricated wall production stage, the edge component hole forming shaped pipe (11) and the wall body hole forming shaped pipe (21) are used to form the edge component vertical hole and the wall body vertical hole respectively. Each vertical hole is arranged along the height direction of the prefabricated wall. After the arrangement of each shaped pipe, vertical steel bar and steel cage is completed, the post-cast concrete is poured in the vertical hole to complete the overlap connection of the edge component vertical steel bar (12) and the wall body vertical distribution steel bar (23); the vertical hole is formed by using the edge component hole forming shaped pipe (11) and the wall body hole forming shaped pipe (21), and the flat mold is used for one-time casting and forming, without the need to use complex special hole forming equipment; The edge component hole forming shaped pipe (11) is composed of a lower pipe (111) and an upper pipe (112). The two pipes are manufactured separately and then assembled into a shape. The cross section of the lower pipe (111) is larger than the cross section of the upper pipe (112), so that the extended steel bars (121) of the lower prefabricated wall can extend into the lower pipe (111) of the upper prefabricated wall and achieve a one-to-one overlap connection with the edge component vertical steel bars (12) outside the lower pipe (111) of the upper prefabricated wall. The dimensions of each shaped pipe along the wall thickness and wall length direction are not less than 70 mm, so as to ensure the pouring quality of the post-cast concrete in the vertical hole. The edge component hole forming shaped pipe (11) and the wall hole forming shaped pipe (21) are both made of metal, and are made by folding thin-walled steel plates with patterns or protrusions on the surface, and have a circular or rectangular cross section. If the cross section is circular, a metal corrugated pipe is used.

2. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 1 is characterized in that: A wall hole forming shaped pipe (21) is arranged at the center of every two rows of vertically distributed wall steel bars (23). The wall hole forming shaped pipe (21) has the same cross-sectional shape and size from top to bottom. When two additional connecting steel bars (24) are used, transverse steel bars (241) are welded at the upper and lower ends of the two additional connecting steel bars (24) to form ladder bars, which facilitates on-site fixing of the additional connecting steel bars (24) and increases force transmission performance.

3. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 2 is characterized in that: The prefabricated edge member is L-shaped, T-shaped or straight-shaped. For the straight-shaped edge member, when the calculated reinforcement area of ​​the vertical steel bars of the straight-shaped edge member is less than a certain value, a single large-sized edge member hole-forming shaped pipe (11) forms a large-sized edge member vertical hole. When the calculated reinforcement area of ​​the vertical steel bars of the straight-shaped edge member is greater than a certain value, two small-sized edge member hole-forming shaped pipes (11) are used to form two small-sized edge member vertical holes. The extended steel bars (121) and the edge member vertical steel bars (12) are overlapped and connected inside and outside the vertical holes. Eight edge member vertical steel bars (12) are arranged in the edge member to control the diameter of the edge member vertical steel bars (12), thereby being used for prefabricated edge members with a large reinforcement ratio of the edge member vertical steel bars (12). The upper pipes (112) of the large-sized and small-sized edge member hole-forming shaped pipes (11) are of the same form.

4. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 3 is characterized in that: The vertical steel bars (12) of the edge member are overlapped within the height range of the lower pipe (111), and the length of the lower pipe (111) is not less than the overlap length of the vertical steel bars (12) of the edge member; the lower pipe (111) of the large-sized edge member hole forming forming pipe (11) adopts a rectangular cross section, which covers or substantially covers the entire straight-line edge member cross section; the rectangular pipe is bent at the middle position along the length direction of the edge member to form a protrusion, avoiding the vertical steel bars (12) of the edge member in the middle, and at the same time forming a stiffening effect to improve the rigidity of the lower pipe (111); the casting holes (113) are arranged along the lower pipe (111) to ensure the casting quality of the concrete below the lower pipe (111) during flat mold production; the minimum size of the casting holes (113) is not less than 70 The lower pipe (111) of the shaped pipe (11) for forming holes in the small-sized edge member adopts a rectangular cross-section, and the four corners are bent to form a cut angle to avoid the vertical steel bars (12) of the edge member. The gap between the two lower pipes (111) on the straight edge member is convenient for pouring concrete below and laying out the reinforcement.

5. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to any one of claims 1 to 4, characterized in that: The edge member vertical steel bars (12) and the wall body vertical distribution steel bars (23) in the prefabricated wall are bent inwards at the upper part of the wall body to pass through the inner side of the longitudinal bars (41) at the bottom of the connecting beam, so as to ensure that the longitudinal bars (41) at the bottom of the connecting beam are arranged in a straight line without bending. The bending angle of the edge member vertical steel bars (12) and the wall body vertical distribution steel bars (23) is not greater than 1:6, and the distance between the edge member vertical steel bars (12) and the hole wall of the edge member hole forming shaped pipe (11) is not less than 5 mm, so as to ensure the installation of the edge member hole forming shaped pipe (11) and the efficient installation of the prefabricated wall panels at the construction site. In the overlap area of ​​the edge member vertical steel bars (12), the center distance between the overlapped edge member vertical steel bars (12) and the extended steel bars (121) is not greater than 50 mm, so as to ensure the force transmission effect of the steel bar overlap. The prefabricated wall steel bar cage is relatively independent from each shaped pipe, so as to facilitate the installation of each shaped pipe.

6. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 1 is characterized in that: In the prefabricated wall, the wall under the window (3) and the walls on both sides are integrally prefabricated. If shear steel bars (33) need to be arranged in the structural design to meet the shear resistance verification requirements of the horizontal joints, the shear steel bars (33) are pre-embedded in the lower prefabricated wall connecting beam (4), and a shaped pipe (31) for forming holes in the wall under the window (3) is arranged in the upper prefabricated wall under the window to form a vertical hole; the shaped pipe (31) for forming holes in the wall under the window runs through the entire wall under the window (3) from top to bottom, and the shaped pipe (31) for forming holes in the wall under the window is made of metal, and is made by folding a thin-walled steel plate with patterns or protrusions on the surface, and has a circular or rectangular cross-section. If the cross-section is circular, a metal corrugated pipe is used.

7. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 6, characterized in that: In the prefabricated wall production stage, the edge member vertical steel bars (12) and the shear steel bars (33) are directly extended from the top surface of the prefabricated wall to the length required by the design and are controlled within the range that meets the transportation requirements. At the construction site, the edge member vertical steel bar extension threaded joint (122) and the window bottom wall joint shear steel bar extension threaded joint (331) are connected to the extension steel bars for extension to meet the corresponding design length requirements. The threaded joint (122) for extending the vertical reinforcement of the edge member is arranged within the range of the horizontal post-casting strip (72) at the top of the precast wall so as not to affect the installation of the upper precast wall; when the precast wall is installed on site, the horizontal joint (71) at the bottom of the precast wall is arranged at the floor elevation, and in order to ensure the compactness of the post-cast concrete at the horizontal joint (71) at the bottom of the precast wall, the distance between the bottom surface of the precast wall and the top surface of the floor slab is not less than 50 mm; at least two internal threaded sleeves (26) are embedded at the bottom of the precast wall, and bolts are screwed into the internal threaded sleeves (26) at the construction site, and the height of the horizontal joint (71) at the bottom of the precast wall is controlled by the bolts to adjust the horizontality of the precast wall.

8. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 7, characterized in that: In order to ensure the compactness of the post-cast concrete at the horizontal joint between the wall body hole forming shaped pipe (21) and the window lower wall hole forming shaped pipe (31), a horizontal inner groove 1 (22) is arranged at the bottom of the wall body, and a horizontal inner groove 2 (32) is arranged at the bottom of the window lower wall (3). The horizontal inner groove 1 (22) and the horizontal inner groove 2 (32) are formed by template molding or special placeholder blocks; the height of the horizontal inner groove 1 (22) and the horizontal inner groove 2 (32) is not less than 80 mm, and the cross-sectional shape is a trapezoidal cross-section that is narrow at the top and wide at the bottom, and the width of the upper bottom of the trapezoidal cross-section is not less than 80 mm.

9. The prefabricated hollow composite shear wall based on flat mold production and steel bar overlap according to claim 1, characterized in that: The prefabricated hollow composite shear wall (81), the thermal insulation layer (82) and the outer leaf wall panel (83) are prefabricated as a whole in a factory to form a prefabricated sandwich thermal insulation hollow composite shear wall, thereby realizing the integration of thermal insulation, decoration and structure of the prefabricated outer wall; the prefabricated hollow composite shear wall (81) and the outer leaf wall panel (83) are fastened by thermal insulation anchors; the prefabricated sandwich thermal insulation hollow composite shear wall (81) is produced by a forward or reverse method, and the construction steps of the outer leaf wall panel (83), the thermal insulation layer (82) and the thermal insulation anchors are added.

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