Prefabricated hollow composite shear wall without vertical reinforcement and with fixed pipe holes

Abstract

The present invention discloses a prefabricated hollow composite shear wall with no vertical steel bars and holes formed by shaped pipes. The vertical holes are formed by shaped pipes to realize the overlap connection of the vertical steel bars and vertical distribution steel bars of the edge components of the upper and lower walls in the overall shear wall structure. The vertical holes run through the height direction of the wall and are formed by shaped pipes, without the need for special hole-forming equipment. The vertical steel bars of the edge components do not extend out of the top and bottom surfaces of the prefabricated wall. A second vertical additional connecting steel bar is arranged at the floor elevation in the vertical hole of the edge component. After pouring the post-cast concrete in the vertical hole, the vertical steel bars of the edge components of the upper and lower prefabricated walls that do not extend out are overlapped and connected with the additional connecting steel bars respectively, so as to realize the continuity of the vertical steel bars of the edge components of the upper and lower prefabricated walls. The vertical distribution steel bars are also overlapped and connected by the additional connecting steel bars. The vertical steel bars do not extend out of the prefabricated wall. The side molds of the prefabricated wall do not have holes in the production stage, so that the molds can be standardized and universalized, which is beneficial to cost control and finished product protection.

Description

Technical Field

[0001] The invention belongs to the technical field of construction, and relates to a prefabricated shear wall, and in particular to a prefabricated hollow composite shear wall with no vertical steel bars and holes formed by shaped pipes. Background Art

[0002] At present, the prefabricated housing in my country mainly adopts the prefabricated integral shear wall structure system. The existing prefabricated integral shear wall structure can be divided into fully prefabricated shear wall structure and composite shear wall structure according to the prefabricated wall form it adopts. The prefabricated shear wall structure connected by steel sleeve grouting is the most mature fully prefabricated shear wall structure currently. However, in engineering applications, there are problems such as difficulty in joint grouting quality control, poor feasibility of winter construction, complex prefabricated wall process and high cost, many construction processes, and long construction period, which restrict the development of fully prefabricated shear wall structure.

[0003] The composite shear wall structure uses indirect overlap of steel bars to achieve the connection of prefabricated wall steel bars. Compared with the fully prefabricated shear wall, the processing and installation precision requirements are low, which can effectively reduce the cost of prefabricated wall connection and the connection quality is controllable. In recent years, a variety of composite shear wall structure systems have been developed in China, such as double-sided composite shear wall structure, prefabricated hollow slab shear wall structure, etc. However, the existing composite shear wall structure systems generally have problems such as complex prefabricated wall production equipment, high production technology management threshold, large fixed investment in production lines, and difficulty in pre-embedding of electromechanical points. It is difficult for some systems to achieve integrated construction of structure, insulation, and decoration for prefabricated exterior walls, which needs further optimization and improvement. Previously, the applicant had submitted an invention and utility model patent application entitled "A prefabricated hollow composite shear wall based on flat mold production and steel bar overlap" to the State Intellectual Property Office. The above patent discloses a prefabricated hollow composite shear wall based on flat mold production and steel bar overlap to solve the shortcomings of the current composite shear wall structure system. Based on the above patents, this patent optimizes and innovates the edge component structure and vertical steel bar connection structure of prefabricated hollow composite shear wall, avoiding the vertical steel bars of the edge components of prefabricated hollow composite shear wall from being out of shape, further improving the level of universality of prefabricated wall molds, and facilitating the transportation of prefabricated walls and the protection of finished products. 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 with no vertical steel bars and shaped pipes for forming holes, the prefabricated hollow composite shear wall has the advantages of convenient connection of composite shear walls, effective control of prefabricated wall costs, high on-site installation efficiency, etc. In addition, a shaped pipe is used to cast the prefabricated wall once to form a vertical hole, so as to realize the connection of the vertical steel bars of the prefabricated wall in the vertical hole, without the need for 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, avoiding the investment of new fixed equipment, with fewer prefabricated production links and high production efficiency, and can realize the integrated construction of prefabricated exterior wall structure, insulation and decoration. At the same time, the vertical steel bars and vertical distribution steel bars of the edge components of the prefabricated wall do not extend out of the prefabricated wall, and the side molds do not need to be opened during the production of the prefabricated wall, so that the mold can be universalized, the production efficiency of the prefabricated wall can be improved, and the comprehensive cost of the prefabricated wall can be further reduced; the vertical steel bars of the prefabricated wall do not extend outward, so the steel bars can be avoided from bending during transportation, which is beneficial to the protection of the finished product, and the on-site hoisting efficiency is high.

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

[0006] The prefabricated hollow composite shear wall with no vertical reinforcement and holes formed by shaped pipes is mainly composed of a prefabricated concrete wall with vertical holes, additional connecting reinforcement arranged in the vertical holes, and on-site post-cast concrete in the vertical holes. The prefabricated hollow composite shear wall includes an edge component part and a wall part. A shaped pipe is used to cast the vertical holes inside the prefabricated wall at one time, and the vertical reinforcement overlap connection of the upper and lower prefabricated walls is achieved by means of post-cast concrete in the vertical holes. The vertical holes in the wall part, the vertical distributed reinforcement, and the overlap connection of the vertical distributed reinforcement are consistent with the patent applied by me, entitled "A prefabricated hollow composite shear wall based on flat mold production and reinforcement overlap". In the edge component part, the vertical reinforcement of the edge component does not extend out of the top and bottom surfaces of the prefabricated wall. A shaped pipe is used to form a vertical hole for the edge component. Vertical additional connecting reinforcement is arranged at the floor elevation of the vertical hole of the edge component. After pouring concrete in the vertical hole, the vertical reinforcement of the edge component of the upper and lower prefabricated walls that does not extend out are overlapped and connected with the additional connecting reinforcement, thereby achieving the continuity of the vertical reinforcement of the edge components of the upper and lower prefabricated walls. The vertical reinforcement of the edge component and the vertical distribution reinforcement of the wall body do not extend out of the prefabricated wall. The overlap connection is achieved with the help of additional connecting reinforcement, which can ensure that the side mold does not need to be opened during the production of the prefabricated wall, realize the universalization of the mold, improve the production efficiency of the prefabricated wall, and facilitate the protection of the finished products during the transportation and hoisting of the prefabricated wall.

[0007] The prefabricated hollow composite shear wall with no vertical steel bars and shaped pipes for forming holes described in the present invention, wherein the shaped pipes at the edge member positions for forming the vertical holes of the edge members have the same cross-section from top to bottom; the vertical force-bearing steel bars of the edge members are arranged inside the prefabricated wall and outside the range of the vertical holes of the edge members, but do not extend out of the top and bottom surfaces of the prefabricated wall; after the on-site prefabricated wall is installed, two vertical additional connecting steel bars are arranged near the floor elevation in the vertical holes of the edge members, the number of the two vertical additional connecting steel bars is the same as the number of the vertical steel bars of the edge members, and the total area of ​​the former is not less than the total area of ​​the latter; and concrete is poured into the vertical holes of the edge members to achieve a one-to-one lap connection between the vertical steel bars of the edge members that do not extend out of the upper and lower prefabricated walls and the additional connecting steel bars.

[0008] The prefabricated hollow composite shear wall with no vertical steel bars and holes formed by shaped pipes described in the present invention, wherein the shaped pipes at the edge member positions used to form the vertical holes of the edge members have the same cross-section from top to bottom, and the cross-sectional shape is rectangular; the vertical force-bearing steel bars of the edge members are arranged inside the prefabricated wall and outside the range of the vertical holes of the edge members, but do not extend out of the top and bottom surfaces of the prefabricated wall; after the on-site prefabricated wall is installed, two vertical additional connecting steel bars are arranged at the floor elevation in the vertical holes of the edge members, the number of the two vertical additional connecting steel bars is the same as the number of the vertical steel bars of the edge members, and the total area of ​​the former is not less than the total area of ​​the latter; and concrete is poured into the vertical holes of the edge members to achieve a one-to-one lap connection between the vertical steel bars of the edge members that do not extend out of the upper and lower prefabricated walls and the additional connecting steel bars.

[0009] The present invention discloses a prefabricated hollow composite shear wall with no vertical reinforcement bars and holes formed by shaped pipes, wherein the additional connecting steel bars are arranged in double rows along the wall thickness direction, and the length is sufficient to meet the force transmission requirements of overlapping with the vertical reinforcement bars of the upper and lower edge members; the distance between the vertical reinforcement bars of the edge members and the additional connecting steel bars should not be less than 5 mm from the hole wall of the shaped pipe used for hole formation of the edge members, so as to ensure the efficient installation of the shaped pipes and the prefabricated wall panels on the construction site; in the overlapping area of ​​the vertical reinforcement bars of the edge members, the center distance of the overlapping vertical reinforcement bars of the edge members should not be greater than 50 mm, so as to ensure the force transmission effect of the reinforcement overlapping; the upper and lower ends of the vertical reinforcement bars of the edge members and the additional connecting steel bars in the same row along the wall thickness direction can be welded with transverse reinforcement bars to form ladder bars, so as to facilitate the positioning of the reinforcement bars and increase the force transmission performance at the same time.

[0010] The cross-sectional shape of the shaped pipe used for forming holes in the edge member is rectangular, and can be made by folding a thin-walled steel plate with patterns or protrusions on the surface, forming a rough surface in the overlapping area of ​​the vertical steel bars of the edge member to enhance force transmission; the dimension of the pipe along the wall thickness direction should not be less than 90 mm, the dimension of the pipe with two vertical rows of additional connecting steel bars arranged inside along the wall length direction should not be less than 90 mm, and the dimension of the pipe with a single vertical row of additional connecting steel bars arranged inside along the wall length direction should not be less than 70 mm, so as to ensure the pouring quality of the post-cast concrete in the vertical hole of the edge member.

[0011] The present invention discloses a prefabricated hollow composite shear wall with no vertical reinforcement bars and holes formed by shaped pipes, wherein the shaped pipes used to form the vertical holes at the wall position have the same cross-section from top to bottom, and can be circular, rectangular or other cross-sectional forms as needed, and the dimensions of the pipes along the wall thickness and wall length directions should not be less than 70 mm to ensure the pouring quality of post-cast concrete in the vertical holes; a shaped pipe is arranged at the center of every two rows of vertically distributed reinforcement bars to form a vertical hole.

[0012] The vertical distribution steel bars at the wall position do not extend out of the top and bottom surfaces of the prefabricated wall. One or two vertical distribution steel bars are arranged near the floor elevation of each vertical hole at the wall position as 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, with a total area 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 encrypted, 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 as additional connecting steel bars, transverse steel bars can be welded at the upper and lower ends of the two vertical distribution steel bars as 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.

[0013] The prefabricated hollow composite shear wall with no vertical reinforcement bars and shaped pipe holes described in the present invention has a horizontal joint at the bottom of the prefabricated wall that should be set at the floor elevation when the prefabricated wall is installed on site. 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 at the bottom of the prefabricated wall, and bolts are screwed into the internal threaded sleeve at the construction site. The bolts are used to control the height of the horizontal joint and adjust the horizontality of the prefabricated wall.

[0014] A horizontal inner groove is arranged at the bottom of the prefabricated hollow composite shear wall to ensure that the post-poured concrete is poured densely. The horizontal groove can be formed by a template. The height of the horizontal inner groove should not be less than 80 mm. 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.

[0015] The prefabricated hollow composite shear wall with no vertical steel bars and shaped pipe holes described in the present invention, wherein, within the length range of the longitudinal bars at the bottom of the connecting beam, the vertical steel bars and the vertical distribution steel bars of the edge members are bent inwards at the upper part of the wall to pass through the inner side of the longitudinal bars at the bottom 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 the vertical distribution steel bars of the edge members 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 members; 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.

[0016] The edge component structure of the present invention can be used to prefabricate straight-line, L-shaped, and T-shaped edge component positions. When used for L-shaped and T-shaped edge components, the layout of the shaped pipeline is adjusted according to the edge component range and the vertical reinforcement layout.

[0017] 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".

[0018] 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.

[0019] The prefabricated hollow composite shear wall with no vertical steel bars and shaped pipes for forming holes described in the present invention has a prefabrication production process comprising the following steps: tying the shear wall steel frame, arranging the shaped pipes in the steel frame, installing the prefabricated wall side mold and the horizontal inner groove mold, positioning the shaped pipes, pouring concrete to form internal vertical holes, and curing and forming and demolding. Furthermore, the prefabricated sandwich insulation hollow composite shear wall can be produced by the forward method or the reverse method, adding the construction steps of the outer leaf wallboard, the insulation layer and the insulation tie parts.

[0020] The prefabricated hollow composite shear wall with no vertical reinforcement bars and shaped pipe holes described in the present invention has an on-site construction process comprising the following steps: installing the prefabricated hollow composite shear wall, adjusting the verticality and horizontality of the prefabricated wall, arranging additional vertical reinforcement connections of edge components and additional vertical distribution reinforcement connection reinforcements in the vertical holes, supporting horizontal joint templates, pouring post-cast concrete in the vertical holes to achieve prefabricated wall connections, and maintaining and removing the templates.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (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 helps to control the connection cost of the prefabricated wall and improve the on-site installation efficiency of the prefabricated wall.

[0023] (2) The present invention uses a shaped pipe to cast in one time to form the internal vertical hole, without the need for special hole-forming equipment. The fixed mold production line and flat mold assembly line commonly used in prefabricated component factories can be used for flat mold production, without the need for new fixed equipment investment; the prefabricated hollow composite shear wall is formed in one time, with fewer prefabrication production links and high production efficiency; the shaped pipe has a simple shape and low processing cost.

[0024] (3) The vertical steel bars and vertical distribution steel bars of the edge components of the prefabricated hollow composite shear wall of the present invention do not extend out of the prefabricated wall, and the opening of side molds can be avoided during the production stage of the prefabricated wall, which is conducive to the standardization and generalization of molds and further reduces the cost of prefabricated components; the prefabricated wall has no long protruding steel bars, which can avoid bending of steel bars during transportation and hoisting, and is conducive to the protection of finished products.

[0025] (4) 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] (5) The prefabricated hollow composite shear wall of the present invention has a light weight. The vertical holes are poured with post-poured concrete to simultaneously complete the lap connection of the vertical steel bars of the upper and lower prefabricated walls. This can avoid the traditional prefabricated wall sleeve grouting joint steel bar alignment and joint grouting construction. The on-site installation efficiency is high, the joint quality is controllable, and the construction process is reduced, which helps to save construction time.

[0027] (6) 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 cast-in-place shear wall structure can be adopted, which is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes in the present invention. The figure also schematically shows the vertical additional connecting reinforcement in the vertical hole and the vertical distributed reinforcement additional connecting reinforcement.

[0029] Figure 2 for Figure 1 Front view of the precast hollow composite shear wall shown.

[0030] Figure 3 for Figure 2 Schematic diagram of cross sections 1-1, 2-2 and 3-3.

[0031] Figure 4 for Figure 2 Schematic diagram of the AA, BB and CC cross sections.

[0032] Figure 5 for Figure 1 3D schematic diagram of the shaped pipe used for drilling holes in the middle edge component position.

[0033] Figure 6 for Figure 1 Three-dimensional schematic diagram of the shaped pipe used for drilling holes in the middle wall.

[0034] Figure 7 for Figure 1 Top view of the cross-section of the I-shaped prefabricated edge component.

[0035] Figure 8 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.

[0036] Fig. 9 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.

[0037] Fig.10 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.

[0038] Fig.11 It is a top sectional view of an L-shaped prefabricated edge member.

[0039] Fig.12 A top cross-sectional view of a T-shaped precast edge member.

[0040] Fig.13 It is a top sectional view of a T-shaped precast restrained edge member.

[0041] Fig.14 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.

[0042] In the figure: 1-edge member area; 2-wall area; 3-connecting beam area; 4-door opening; 11-shaped pipe for hole forming of edge member; 111-shaped pipe for hole forming of double-row vertical steel bars of edge member; 112-shaped pipe for hole forming of single-row vertical steel bars of edge member; 12-vertical steel bars of edge member; 121-transverse steel bars of vertical steel bars of edge member; 13-stirrups of edge member; 14-tension bars of edge member; 15-vertical additional connecting steel bars 2; 151-transverse steel bars of vertical additional connecting steel bars 2; 21-shaped pipe for hole forming of wall body; 22-bottom of wall body 1-horizontal inner groove; 23-vertical distribution steel bars; 24-additional connecting steel bars for vertical distribution steel bars; 241-transverse steel bars for additional connecting steel bars for vertical distribution steel bars; 25-tie bars in the overlap area of ​​vertical distribution steel bars; 26-embedded internal threaded sleeves for leveling precast walls; 31-longitudinal bars at the bottom of connecting beams; 32-tie bars in the anchoring area of ​​the longitudinal bars at the bottom of connecting beams; 33-hoops for connecting beams; 34-longitudinal bars at the top of connecting beams; 51-horizontal joints at the bottom of precast walls; 52-horizontal post-cast strips at the top of precast walls; 53-precast floor slabs; 61-precast hollow composite shear walls; 62-insulation layer; 63-external leaf wall panels. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings and examples.

[0044] like Figure 1-Figure 14 As shown, the present invention provides a prefabricated hollow composite shear wall with no vertical steel bars and shaped pipe holes, comprising an edge component area 1 and a wall area 2, wherein:

[0045] A shaped pipe 11 for forming holes in the edge member and vertical steel bars 12 for the edge member are provided in the edge member area 1. A vertical hole is formed in the shaped pipe 11 for forming holes in the edge member. The vertical steel bars 12 for the edge member are located outside the vertical hole. Vertical additional connecting steel bars 15 are arranged at the floor elevation in the vertical hole. After pouring the post-cast concrete in the vertical hole, the vertical steel bars 12 of the edge member in the upper and lower prefabricated walls of the shear wall structure are overlapped and connected by the additional connecting steel bars 15, and the vertical steel bars 12 of the edge member do not extend out of the top or bottom surface of the prefabricated wall.

[0046] At the same time, a shaped pipe 21 for wall hole formation and vertical distribution steel bars 23 are provided in the wall area 2. A vertical hole is formed in the shaped pipe 21 for wall hole formation. The vertical distribution steel bars 23 are located outside the vertical hole and do not extend out of the top or bottom surface of the prefabricated wall. One or two vertical additional connecting steel bars 24 are arranged at the floor elevation in the vertical hole. The additional connecting steel bars 24 are overlapped and connected with the four adjacent wall vertical distribution steel bars 23 outside the vertical hole where they are located.

[0047] Through the above structure, side mold holes can be avoided in the prefabricated wall production stage, and mold standardization and generalization can be achieved, which is convenient for cost control and finished product protection.

[0048] Specifically, in the prefabricated wall production stage, the present invention adopts a shaped pipe 11 for forming holes in edge components and a shaped pipe 21 for forming holes in wall bodies to form vertical holes in edge components and vertical holes in wall bodies respectively. The vertical holes are arranged along the height direction of the prefabricated wall. Additional connecting steel bars 1 24 and additional connecting steel bars 2 15 are arranged in the vertical holes on site, and post-cast concrete is poured in the vertical holes to complete the overlapping connection of the vertical steel bars 12 of the edge components and the vertical distributed steel bars 23 of the wall bodies. The prefabricated wall is cast and formed in one time using a fixed mold production line or a flat mold assembly line. When the prefabricated wall is installed on site, the horizontal joint 51 at the bottom of the prefabricated wall is set at the floor elevation, and the joint height is not less than 50 mm to ensure the compactness of the post-cast concrete at the horizontal joint 51. 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 on the construction site. The bolts are used to control the height of the horizontal joint 51 and adjust the horizontality of the prefabricated wall.

[0049] In the present invention, for the I-shaped edge member, a large-section pipe 111 and a small-section pipe 112 are used to form two large and small vertical holes of the edge member, and the lap connection of the vertical steel bars 12 of the edge member is realized at the vertical holes; the large-section pipe 111 and the small-section pipe 112 have the same cross-section from top to bottom, and the cross-sectional shape is rectangular. They are made of thin-walled steel plates with patterns or protrusions on the surface. The dimensions of the large-section pipe 111 and the small-section pipe 112 along the wall thickness direction are not less than 90 mm, the dimension of the large-section pipe 111 along the wall length direction is not less than 90 mm, and the dimension of the small-section pipe 112 along the wall length direction is not less than 70 mm, so as to ensure the pouring quality of the post-cast concrete in the vertical hole of the edge member.

[0050] In the present invention, the additional connecting steel bars 15 can be arranged in double rows in the vertical hole along the wall thickness direction, and overlapped one-to-one with the edge member vertical steel bars 12 outside the hole; the distance between the additional connecting steel bars 15 and the edge member vertical steel bars 12 and the hole wall of the edge member forming pipe 11 is not less than 5 mm, ensuring the installation of the edge member forming pipe 11 and the efficient installation of the prefabricated wall panels on the construction site; in the overlapping area of ​​the edge member vertical steel bars, the center distance between the overlapping edge member vertical steel bars 12 and the additional connecting steel bars 15 is not more than 50 mm, ensuring the force transmission effect of the steel bar overlap.

[0051] In the present invention, the upper and lower ends of the vertical steel bars 12 of the same row of edge components along the wall thickness direction can be welded with transverse steel bars 121 to form ladder bars, and the upper and lower ends of the additional connecting steel bars 15 of the same row can be welded with transverse steel bars 151 to form ladder bars, which is convenient for steel bar positioning and increases force transmission performance.

[0052] In the present invention, within the length range of the longitudinal reinforcement 31 at the bottom of the connecting beam, the vertical reinforcement 12 and the vertical distribution reinforcement 23 of the edge member can be bent inward at the upper part of the wall to pass through the inner side of the longitudinal reinforcement 31 at the bottom of the connecting beam, thereby ensuring that the longitudinal reinforcement 31 at the bottom of the connecting beam is arranged in a straight line without the need for bending; the bending angle of the vertical reinforcement 12 and the vertical distribution reinforcement 23 of the edge member is not greater than 1:6, and the prefabricated wall reinforcement cage is relatively independent of the shaped pipe to facilitate the installation of the shaped pipe.

[0053] When the prefabricated wall includes L-shaped and T-shaped prefabricated edge components, a shaped pipe 11 for edge component hole formation is arranged between every two rows and four edge component vertical steel bars 12 to form a vertical hole. The edge component vertical steel bars 12 do not extend out of the prefabricated wall. Additional connecting steel bars 15 are arranged near the floor elevation at the four corners of each vertical hole to form a one-to-one overlap with the upper and lower edge component vertical steel bars 12. The edge component hole forming shaped pipe 11 adopts a rectangular cross-section, and the dimensions along the wall thickness and length directions should not be less than 90 mm.

[0054] In the present invention, in order to ensure the compactness of the post-cast concrete at the horizontal joints 51 between the shaped pipes 21 for wall hole formation, a horizontal inner groove 22 is arranged at the bottom of the wall, and the horizontal inner groove 22 is formed by template molding or shaped placeholder blocks; the height of the horizontal inner groove 22 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.

[0055] In the present invention, a prefabricated hollow composite shear wall 61, an insulation layer 62 and an outer leaf wall panel 63 are 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 61 and the outer leaf wall panel 63 are fastened with insulation anchors; the prefabricated sandwich insulation hollow composite shear wall is produced by a forward or reverse method, and the construction steps of the outer leaf wall panel 63, the insulation layer 62 and the insulation anchors are added.

[0056] The following are some preferred embodiments of the present invention.

[0057] Embodiment 1

[0058] like Figure 1 to Figure 7 As shown, the prefabricated hollow composite shear wall mainly includes an edge component area 1, a wall area 2, a connecting beam area 3 and a door opening 4. 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 with no vertical steel bars and shaped pipe holes of the present invention. The specific embodiment includes the connecting beam area 3 and the door opening 4 to more comprehensively illustrate the scheme of the present invention, but it does not mean that the prefabricated hollow composite shear wall with no vertical steel bars and shaped pipe holes of the present invention must be used for the prefabricated shear wall containing the connecting beam area 3 and the door opening 4.

[0059] Taking into account the advantages and disadvantages of the existing prefabricated shear wall technology system, the prefabricated hollow composite shear wall of the present invention uses a shaped pipe to form an internal vertical hole, and the vertical steel bars of the prefabricated edge components and the vertical distribution steel bars of the wall body are overlapped and connected by additional connecting steel bars and do not extend out of the prefabricated wall. The prefabricated wall can be formed in one step without the need for special hole-forming equipment, and can be produced on the fixed mold production line and flat mold assembly line commonly used in prefabricated component factories. The production process is relatively simple; the vertical steel bars of the edge components and the vertical distribution steel bars do not extend out of the prefabricated wall, and the side mold opening can be avoided in the prefabricated wall production stage, which can realize mold standardization and generalization, improve production efficiency, control the cost of prefabricated components, and facilitate the protection of finished products during transportation and hoisting.

[0060] In this embodiment, the edge component region 1 is in a straight line shape, and a vertical hole of the edge component is formed by using a shaping pipe 11 for forming a hole of the edge component. Figure 5 As shown, the edge member hole forming shaped pipe 11 is composed of two shaped pipes, a large cross-section pipe 111 and a small cross-section pipe 112, and the precast wall concrete is poured to form two vertical holes of the edge member, one large and one small. Figure 7 As shown, six edge member vertical steel bars 12 are arranged inside the prefabricated wall and outside the range of the edge member vertical holes, and none of them extend out of the top and bottom surfaces of the prefabricated wall. Four edge member vertical steel bars 12 are distributed at the four corners of the large-section pipe 111, and the other two edge member vertical steel bars 12 are distributed at the two corners of the small-section pipe 112 away from the large-section pipe 111. After the installation of the prefabricated wall at the construction site is completed, vertical additional connecting steel bars 15 are arranged at the floor elevation in the vertical holes of the edge members. The number of additional connecting steel bars 15 is the same as the number of vertical steel bars 12 of the edge members, and they are arranged in double rows along the thickness direction of the wall, wherein one additional connecting steel bar 15 is arranged at each of the four corners in the large-section pipe 111, and one additional connecting steel bar 15 is arranged at each of the two corners in the small-section pipe 112 away from the large-section pipe 111. The total area of ​​the additional connecting steel bars 15 is not less than the total area of ​​the edge member vertical steel bars 12. Pouring concrete in the vertical holes of the edge members, as shown in FIG. Figure 8 As shown, a one-to-one overlap connection between the vertical reinforcement bars 12 of the edge components of the upper and lower prefabricated walls that do not extend out and the additional connection reinforcement bars 15 is achieved, and the overlap length should meet the overlap force transmission requirements.

[0061] The large-section pipe 111 and the small-section pipe 112 have the same cross-section from top to bottom, and the cross-section shape is rectangular. They can be made by rolling thin-walled steel plates with patterns or protrusions on the surface, and forming a rough surface in the vertical steel bar overlap area of ​​the edge member to enhance force transmission. The dimensions of the large-section pipe 111 and the small-section pipe 112 along the wall thickness direction should not be less than 90mm, the dimension of the large-section pipe 111 along the wall length direction should not be less than 90mm, and the dimension of the small-section pipe 112 along the wall length direction should not be less than 70mm, so as to ensure the pouring quality of the post-cast concrete in the vertical hole of the edge member.

[0062] The distance between the vertical steel bars 12 of the edge components and the additional connecting steel bars 15 and the hole wall of the large-section pipe 111 and the small-section pipe 112 should not be less than 5mm to ensure the installation of the shaped pipes 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 components, the center distance of the overlapping vertical steel bars 12 of the edge components and the additional connecting steel bars 15 should not be greater than 50mm to ensure the force transmission effect of the steel bar overlap; Figure 4 , Figure 8 As shown, the upper and lower ends of the vertical steel bars 12 of the same row of edge components along the wall thickness direction can be welded with transverse steel bars 121 to form ladder bars, and the upper and lower ends of the same row of additional connecting steel bars 15 can be welded with transverse steel bars 151 to form ladder bars, which is convenient for steel bar positioning and increases force transmission performance.

[0063] 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 vertical distribution steel bars 23 to form a vertical hole.

[0064] The vertical distribution steel bars 23 do not extend out of the top and bottom surfaces of the prefabricated wall. Fig. 9 As shown, a vertical 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.10 As shown, two additional connecting steel bars 24 are arranged near the floor elevation in the vertical hole formed by the wall body hole forming fixed pipe 21, and overlapped and connected with the four adjacent vertical distribution steel bars 21 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 formed by a single wall body hole forming fixed pipe 21 is not less than the total area of ​​the four vertical distribution steel bars 23 overlapped and connected with it.

[0065] like Figure 4As shown, within the length range of the longitudinal reinforcement 31 at the bottom of the connecting beam, the vertical reinforcement 12 and the vertical distribution reinforcement 23 of the edge member are bent at the upper part of the wall to pass through the inner side of the longitudinal reinforcement 31 at the bottom of the connecting beam, ensuring that the longitudinal reinforcement 31 at the bottom of the connecting beam is arranged in a straight line without bending. The bending angle of the vertical reinforcement 12 and the vertical distribution reinforcement 23 of the edge member should not be greater than 1:6, and the length of the bending section should be controlled to facilitate the arrangement of the stirrups 13 of the edge member. The longitudinal reinforcement 31 at the bottom of the connecting beam is within the anchorage range of the walls on both sides, and tie bars 32 are arranged one by one at the intersection with the vertical reinforcement to improve the anchorage performance of the longitudinal reinforcement 31 at the bottom of the connecting beam in the walls on both sides.

[0066] like Figure 8 to Figure 10 As shown, when the prefabricated wall is installed on site, the horizontal joint 51 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 51, 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 51 and adjust the horizontality of the prefabricated wall.

[0067] In particular, the spacing of the shaped pipes 21 for forming holes in the wall body 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 22 is set at the bottom of the wall body and the wall under the window. The horizontal inner groove 22 can be formed by template forming or special placeholders. The height of the horizontal inner groove 22 should not be less than 80mm, and the cross-sectional shape is a trapezoidal cross-section with narrow upper and wide lower parts. The upper bottom width of the trapezoidal cross-section should not be less than 80mm.

[0068] 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".

[0069] 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 additional connecting steel bar 2 15 and the additional connecting steel bar 1 24, supporting the horizontal joint template, pouring the post-cast concrete in the vertical hole to realize the prefabricated wall connection, and curing and demolding.

[0070] Fig.11 , Fig.12 and Fig.13The preferred embodiments 2, 3 and 4 of the present invention are respectively used for L-shaped prefabricated edge components, T-shaped prefabricated edge components and T-shaped prefabricated constrained edge components. When the prefabricated wall includes L-shaped and T-shaped edge components, a shaped pipe 11 for forming a hole for the edge component is arranged between every two rows and four vertical steel bars of the edge component to form a vertical hole. As in the preferred embodiment 1, the vertical steel bars 12 of the edge component do not extend out of the prefabricated wall. Vertical additional connecting steel bars 2 15 are arranged near the floor elevation at the four corners of each vertical hole, and overlapped one-to-one with the vertical steel bars 12 of the upper and lower edge components. The structural requirements of the overlapped steel bars are the same as those in the preferred embodiment 1. When there are connecting beams 3 on both sides of the edge component, within the length range of the longitudinal bars 31 at the bottom of the connecting beam, the vertical steel bars 12 of the edge component are bent at the upper part of the wall to pass through the inner side of the longitudinal bars 31 at the bottom of the connecting beam. Each shaped pipe 11 needs to be provided with four vertical additional connecting steel bars 15. The dimensions of the shaped pipe 11 along the wall thickness and length direction should not be less than 90 mm. The manufacturing process is the same as that of the preferred embodiment 1.

[0071] Preferred embodiments 1 to 4 The prefabricated hollow composite shear walls are structural walls and can be used for building exterior walls or interior walls. Fig.14 As shown, the prefabricated hollow composite shear wall 61, the insulation layer 62 and the outer leaf wall panel 63 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.

[0072] 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 with no vertical reinforcement and shaped pipe holes, comprising an edge member area (1) and a wall area (2), characterized in that: The edge component region (1) is provided with a shaped pipe (11) for forming a hole in the edge component and vertical steel bars (12) for the edge component. A vertical hole is formed in the shaped pipe (11) for forming a hole in the edge component. The vertical steel bars (12) for the edge component are located outside the vertical hole. A second vertical additional connecting steel bar (15) is arranged at the floor elevation in the vertical hole. After pouring the post-cast concrete in the vertical hole, the vertical steel bars (12) for the edge component in the upper and lower prefabricated walls of the shear wall structure are overlapped and connected by the second additional connecting steel bar (15). The vertical steel bars (12) for the edge component do not extend out of the top or bottom surface of the prefabricated wall. A wall body hole forming shaped pipe (21) and vertical distribution steel bars (23) are provided in the wall body region (2); a vertical hole is formed in the wall body hole forming shaped pipe (21); the vertical distribution steel bars (23) are located outside the vertical hole and do not extend out of the top or bottom surface of the prefabricated wall; one or two vertical additional connecting steel bars (24) are arranged at the floor elevation in the vertical hole; the additional connecting steel bars (24) are overlapped and connected with four adjacent wall body vertical distribution steel bars (23) outside the vertical hole where they are located; 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, and the vertical holes are arranged along the height direction of the prefabricated wall; the additional connecting steel bars (15) are arranged in double rows in the vertical holes along the thickness direction of the wall body, and overlapped one-to-one with the vertical steel bars (12) of the edge components outside the holes.

2. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1 is characterized in that: The second additional connecting steel bar (15) and the first additional connecting steel bar (24) are arranged in the vertical hole on site, and the post-cast concrete is poured in the vertical hole to complete the overlap connection of the vertical steel bars (12) of the edge member and the vertical distribution steel bars (23) of the wall body; the precast wall is cast and formed in one time using a fixed mold production line or a flat mold flow production line; when the precast wall is installed on site, the horizontal joint (51) at the bottom of the precast wall is set at the floor elevation, and the joint height is not less than 50 mm to ensure the compactness of the post-cast concrete at the horizontal joint (51); at least two internal threaded sleeves (26) are embedded in the bottom of the precast wall, and bolts are screwed into the internal threaded sleeves (26) on the construction site, and the bolts are used to control the height of the horizontal joint (51) and adjust the horizontality of the precast wall.

3. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1 is characterized in that: For the straight edge member, a large-section pipe (111) and a small-section pipe (112) are used to form two vertical holes of the edge member, one large and one small, and the vertical steel bars (12) of the edge member are overlapped and connected at the vertical holes; the large-section pipe (111) and the small-section pipe (112) have the same cross-section from top to bottom, and the cross-sectional shape is rectangular, and are made by rolling a thin-walled steel plate with patterns or protrusions on the surface; the dimensions of the large-section pipe (111) and the small-section pipe (112) along the wall thickness direction are not less than 90 mm, the dimension of the large-section pipe (111) along the wall length direction is not less than 90 mm, and the dimension of the small-section pipe (112) along the wall length direction is not less than 70 mm, so as to ensure the pouring quality of the post-cast concrete in the vertical hole of the edge member.

4. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1 is characterized in that: The distance between the additional connecting steel bar 2 (15) and the vertical steel bar of the edge member (12) and the hole wall of the shaped pipe (11) for edge member hole formation is not less than 5 mm, so as to ensure the efficient installation of the shaped pipe (11) for edge member hole formation and 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 of the edge member (12) and the additional connecting steel bar 2 (15) is not more than 50 mm, so as to ensure the force transmission effect of the steel bar overlapping.

5. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1, characterized in that: The upper and lower ends of the vertical steel bars (12) of the same row of edge components along the wall thickness direction are welded with a first transverse steel bar (121) to form a ladder bar, and the upper and lower ends of the second additional connecting steel bars (15) of the same row are welded with a second transverse steel bar (151) to form a ladder bar, which facilitates the positioning of the steel bars and increases the force transmission performance.

6. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1, characterized in that: Within the length range of the longitudinal reinforcement (31) at the bottom of the coupling beam, the vertical reinforcement (12) and the vertical distribution reinforcement (23) of the edge member are bent inwards at the upper part of the wall to pass through the inner side of the longitudinal reinforcement (31) at the bottom of the coupling beam, thereby ensuring that the longitudinal reinforcement (31) at the bottom of the coupling beam is arranged in a straight line without the need for bending. The bending angle of the vertical reinforcement (12) and the vertical distribution reinforcement (23) of the edge member is not greater than 1:6, and the prefabricated wall reinforcement cage is relatively independent of the shaped pipe, thereby facilitating the installation of the shaped pipe.

7. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1, characterized in that: When the prefabricated wall includes L-shaped or T-shaped prefabricated edge components, a shaped pipe (11) for forming a hole in the edge component is arranged between every two rows or four vertical steel bars (12) of the edge component to form a vertical hole. The vertical steel bars (12) of the edge component do not extend out of the prefabricated wall. Two additional connecting steel bars (15) are arranged near the floor elevation at the four corners of each vertical hole to form a one-to-one overlap with the vertical steel bars (12) of the upper and lower edge components. The shaped pipe (11) for forming a hole in the edge component adopts a rectangular cross-section, and the dimensions along the wall thickness and length direction should not be less than 90 mm.

8. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1, characterized in that: In order to ensure the compactness of the post-cast concrete at the horizontal joints (51) between the shaped pipes (21) for forming holes in the wall body, a horizontal inner groove (22) is arranged at the bottom of the wall body. The horizontal inner groove (22) is formed by using a template or a shaped placeholder block. The height of the horizontal inner groove (22) 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. The width of the upper bottom of the trapezoidal cross-section is not less than 80 mm.

9. The prefabricated hollow composite shear wall with no vertical reinforcement and shaped pipe holes according to claim 1, characterized in that: The prefabricated hollow composite shear wall (61), the thermal insulation layer (62) and the outer leaf wall panel (63) 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 (61) and the outer leaf wall panel (63) are fastened by thermal insulation anchors; the prefabricated sandwich thermal insulation hollow composite shear wall is produced by a forward or reverse method, and the construction steps of the outer leaf wall panel (63), the thermal insulation layer (62) and the thermal insulation anchors are added.

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