A local hollow shear wall and a production method thereof

Abstract

The present application belongs to the technical field of fabricated building, and particularly relates to a local hollow shear wall and a production method thereof. The plurality of cavities in the shear wall include a first cavity and a second cavity in communication; the first cavity is vertically through the local hollow shear wall, and each second cavity is arranged at a side of the tieback away from the first cavity. Thus, the shear wall simplifies the form of the cavity of the shear wall, so that it can be horizontally produced on a horizontal mold table, and the shear wall increases the engagement of the post-cast concrete and the prefabricated part, and improves the overall strength of the shear wall. The production method adopts the mode of integral one-time pouring of the horizontal mold on the horizontal mold table, so that the production method reduces the production process, improves the production efficiency, improves the repeated use efficiency of the horizontal mold, and saves the production cost. Moreover, the protection box in the horizontal mold not only protects the tieback from being contaminated, but also forms the rib part of the fishbone-shaped cavity, and improves the overall strength of the shear wall.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, and in particular relates to a partially hollow shear wall and its production method. Background Technology

[0002] In recent years, the country has vigorously developed prefabricated buildings, which has powerfully promoted the process of building industrialization. Shear wall structures, as one of the most widely used structural forms in the construction industry, rely heavily on prefabrication and assembly technologies for their development. Among these, prefabricated hollow shear wall technology, due to its significant advantages such as light weight, ease of transportation and installation, material savings, and the ability to provide space for pipeline layout, is being widely used in the industry and has become an important technology driving the development of building industrialization.

[0003] However, in the existing technology, hollow shear walls are usually cast using three-dimensional molds during prefabrication. One mold can only be used to prefabricate one specification of hollow shear wall, resulting in low mold utilization and increased production costs. Furthermore, the existing invention patent "A precast concrete wall panel and its constituent prefabricated building and construction method" (patent number: CN106499116A) proposes a precast wall panel construction method, which sets vertically penetrating holes and horizontally non-penetrating holes in the wall panel to form cavities. This technology has the following problems: First, the cavities are crisscrossed and the pathways are complex, making it difficult to effectively guarantee the compactness of the poured concrete in the cavities; second, no reinforcing bars are set in the cavities, and cold joints are easily generated between the poured concrete and the inner wall of the precast cavity during the hardening and shrinkage process, thereby weakening the overall load-bearing performance of the shear wall; in addition, for L-shaped shear walls, this technology usually splits them into two straight wall panels, which are precast separately and then assembled. This not only increases the number of production steps and the complexity of the process, but also increases the number of wall joints, which has an adverse effect on the overall strength and seismic performance of the structure. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a partially hollow shear wall and its production method, thereby solving the technical problems of poor overall strength and seismic performance of the current hollow shear wall and low utilization rate of the molds for prefabricated hollow shear walls.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] On one hand, embodiments of the present invention provide a partially hollow shear wall, including a plurality of cavities arranged along the extension direction of the partially hollow shear wall and a plurality of rows of tie bars; the cavities include a first cavity and a second cavity that are connected; the first cavity extends vertically through the partially hollow shear wall, and the tie bars in each row are arranged at intervals in the vertical direction and are all located at the same edge of the same first cavity; each tie bar is provided with a second cavity located on the side of the tie bar away from the first cavity.

[0009] Furthermore, when splicing two adjacent layers of partially hollow shear walls, lap joints are installed and inserted into the two first cavities corresponding to each pair of upper and lower positions, with a gap between the lap joints and the inner wall of the first cavity.

[0010] On the other hand, embodiments of the present invention also provide a method for producing a partially hollow shear wall, comprising the following steps:

[0011] S1: Tie the steel cage with tie bars and place it horizontally on the horizontal formwork;

[0012] S2: Install the horizontal mold. The horizontal mold includes an outer steel plate mold, an inner steel pipe mold, and a protective box. The outer steel plate mold surrounds the outside of the steel cage. In the wall area, an inner steel pipe mold is set between every two rows of opposite tie bars. A protective box is set at each tie bar. The protective box is a five-sided prism with one open side. The opening of the protective box faces the inner steel pipe mold that contacts the tie bar and abuts against the inner steel pipe mold, covering the tie bar part inside, so that the steel cage is contained within the space enclosed by the horizontal mold.

[0013] S3: A wall formed by pouring concrete as a whole in the area enclosed by the outer steel plate formwork, the inner steel pipe formwork, and the protective box to create a partially hollow shear wall;

[0014] S4: After the concrete reaches a certain strength, the outer steel plate formwork and the inner steel pipe formwork are removed. The part of the inner steel pipe formwork that is removed forms the first cavity of the partial hollow shear wall, and the part of the protective box forms the second cavity of the partial hollow shear wall.

[0015] Furthermore, during the installation of the horizontal mold in step S2, the inner mold of the steel pipe and the protective box are installed sequentially from one side of the steel cage to the other side, and then the outer mold of the steel plate is installed.

[0016] Furthermore, the distance between the opening of the protective box and the vertical wall is less than the distance between the inner wall of the steel pipe and the vertical wall.

[0017] Furthermore, the two side walls of the protective box opening are each provided with a groove that corresponds to the position of the tie bar and is adapted in shape to embed the tie bar.

[0018] Furthermore, in step S4, when removing the horizontal mold, the inner steel pipe mold is removed first, followed by the outer steel plate mold. The inner steel pipe mold consists of two steel pipes with continuously increasing cross-sectional dimensions from one end to the other, arranged coaxially opposite each other. When pouring concrete, the two steel pipes in one inner steel pipe mold have their larger cross-sectional dimensions facing outwards from the outside of the local hollow shear wall so that when removing the inner steel pipe mold, the two steel pipes can be pulled out from the top and bottom of the local hollow shear wall respectively.

[0019] Furthermore, the width of the inner mold of the steel pipe shall not exceed 600mm.

[0020] Furthermore, hooks are fixed at both ends of the inner mold of the steel pipe.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of this invention are:

[0023] This invention discloses a partially hollow shear wall, which incorporates multiple fishbone-shaped cavities formed by first and second cavities within the shear wall. Compared to existing technologies, this design simplifies the form of the internal cavities, allowing for horizontal production on a horizontal formwork. Furthermore, it enhances the interlocking between the cast-in-place concrete and the precast portion, generating friction to prevent separation under stress, effectively limiting the shrinkage of the cast-in-place concrete, reducing cold joints between new and old concrete, and improving the overall strength of the shear wall.

[0024] This invention discloses a method for producing partially hollow shear walls. By employing a horizontal mold and casting the entire structure in one go on a standard horizontal mold platform, it reduces production steps, increases production efficiency, and improves the reusability of the horizontal mold, thus saving production costs. Furthermore, the protective box within the horizontal mold protects the tie bars from contamination and also forms the ribbed portion of the fishbone-shaped cavity, increasing the interlocking between the post-cast concrete and the precast portion, generating friction to prevent separation under stress, effectively limiting the shrinkage of the post-cast concrete, reducing the formation of cold joints between the old and new concrete, and improving the overall strength of the shear wall. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the transverse section of a partially hollow shear wall.

[0026] Figure 2 This is a vertical sectional structural diagram showing the overlap of two partially hollow shear walls on different floors.

[0027] Figure 3 This is a schematic diagram showing the positions of the inner formwork of the steel pipe and the protective box in a partially hollow shear wall.

[0028] Figure 4 A cross-sectional structural diagram of a partially hollow shear wall during production;

[0029] Figure 5 This is a cross-sectional structural diagram from another perspective during the production of a partially hollow shear wall.

[0030] Figure 6 This is a diagram showing the positions of the protective box and the tie rod.

[0031] [Explanation of Labels in the Attached Images]

[0032] 1: Partially hollow shear wall; 11: Tie bar; 12: First cavity; 13: Second cavity; 14: Wall area; 15: End column area; 16: Lap bar; 17: Wall body;

[0033] 2: Horizontal mold table;

[0034] 3: Horizontal mold; 31: Steel plate outer mold; 32: Steel pipe inner mold; 33: Protective box; 331: Groove; 34: Hook. Detailed Implementation

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0036] like Figure 1-6 As shown, the present invention provides a partially hollow shear wall, such as Figure 1 , Figure 4 As shown, the partial hollow shear wall 1 includes multiple cavities arranged along its extension direction and multiple rows of tie bars 11. In this embodiment, the cross-section of the partial hollow shear wall 1 is L-shaped to accommodate the stress and structural requirements of corner locations commonly found in building structures.

[0037] The term "partially hollow" refers to a shear wall that does not consist of a single, continuous cavity running from top to bottom. Instead, a series of discontinuous cavities are arranged only at specific locations within the shear wall (such as critical stress areas, areas with dense reinforcement, or areas requiring mechanical interlocking with the subsequent concrete). The rest of the shear wall remains dense solid concrete. This construction balances the reduction of the wall's self-weight and material conservation with structural integrity and load-bearing capacity. It avoids the potential problems of local crushing or instability that can occur with fully hollow shear walls, as well as the inability to produce horizontally during the manufacturing process.

[0038] like Figure 1As shown, the cavity includes a first cavity 12 and a second cavity 13 that are interconnected. The first cavity 12 extends vertically through the partially hollow shear wall 1, from the top to the bottom of the wall 17, forming a continuous vertical channel. The main function of the first cavity 12 is to allow for the later insertion of lap reinforcement bars 16, thereby achieving a reliable connection between the upper and lower layers of the wall 17.

[0039] like Figure 1 , Figure 3 As shown, each tie bar 11 has a cubic second cavity 13 on the side opposite to the first cavity 12. The second cavity 13 does not extend vertically, but only exists locally at the height of the tie bar 11, and two adjacent second cavities 13 are spaced apart by a certain distance.

[0040] like Figure 2 , Figure 3 As shown, each row of tie rods 11 is arranged at intervals along the vertical direction and is located at the same edge of the same first cavity 12 (e.g., the left or right side of the first cavity 12). Since each tie rod 11 corresponds to an independent second cavity 13, and the second cavities 13 are discontinuous along the height direction, the cavity formed by the first cavity 12 (similar to the spine of a fish) and multiple second cavities 13 (similar to the ribs of a fish) is fishbone shaped.

[0041] The fishbone-shaped cavity can enhance mechanical interlocking: when the upper and lower local hollow shear walls 1 are spliced ​​and then the concrete is poured, the concrete will flow into the second cavity 13. After solidification, it will form concrete "pins" or "protrusions". These protrusions are embedded in the interior of the wall 17, which significantly improves the shear resistance and peel resistance of the interface between the old and new concrete.

[0042] Moreover, the discontinuous arrangement of the second cavity 13 can block the straight propagation path of the crack, causing any possible micro-cracks to disperse and detour, thereby delaying the formation of through cracks.

[0043] In addition, the fishbone-shaped cavity breaks the continuous first cavity 12 into multiple local areas, avoiding stress concentration caused by the long strip cavity and improving the overall performance of the wall 17 under horizontal load.

[0044] Specifically, such as Figure 1 As shown, the partially hollow shear wall 1 includes a wall body area 14 located in the middle and end column areas 15 located at both ends. These two areas have significant differences in stress characteristics and reinforcement configuration, so the arrangement of the cavities is also different.

[0045] All the first cavities 12 located in the wall section 14 are situated between two adjacent rows of tie bars 11. That is, in the wall section 14, a second cavity 13 is provided on the outer side of each row of tie bars 11 (the side facing away from the first cavity 12), resulting in second cavities 13 distributed on both sides of the first cavity 12. Therefore, the cavities in the wall section 14 have a double-sided herringbone shape. This symmetrical arrangement helps to balance the forces within the plane of the wall 17, reduces eccentricity, and is suitable for the middle section of a shear wall where shear and bending are the primary forces.

[0046] The arrangement of the first cavity 12 in the end column area 15 differs from that in the wall area 14, specifically in two cases:

[0047] All the first cavities 12 located inside the end column area 15 (i.e., not directly exposed to the edge of the wall 17) are arranged in the same way as the wall body area 14, also located between two adjacent rows of tie bars 11, thus also exhibiting a double-sided herringbone shape. However, all the first cavities 12 located at the edge of the end column area 15 (i.e., the short wall area and the outermost part of the long wall area of ​​the local hollow shear wall 1) are arranged one-to-one with each row of tie bars 11. That is, each row of tie bars 11 has an independently provided first cavity 12 on its outer side, and these first cavities 12 have a second cavity 13 distributed on only one side. Therefore, the cavities at the edge of the end column area 15 exhibit a single-sided herringbone shape. The core reason for this arrangement is that the end column area 15 is the main load-bearing area of ​​the local hollow shear wall 1. Under earthquake or wind loads, the end column area 15 bears a large axial force, bending moment, and shear force, thus requiring more lapped bars 16 (vertical reinforcing bars) than the wall body area 14. More lapped bars 16 require more cavities to accommodate them, in order to avoid the problems of the bars being squeezed together and the concrete not being poured densely.

[0048] Inside the end column area 15, since the space is relatively ample, a double-sided fishbone-shaped cavity can be used to maintain the symmetry of the structure while ensuring a sufficient number of cavities.

[0049] At the edge of the end column area 15, due to the need to accommodate additional lap reinforcements 16, the original pattern of "setting a first cavity 12 between two rows of tie bars 11" can no longer meet the requirements. Therefore, it is changed to a denser arrangement pattern of "each row of tie bars 11 corresponding to a first cavity 12", i.e., a single-sided herringbone shape. This pattern significantly increases the total number of first cavities 12, providing space for the insertion and positioning of more lap reinforcements 16.

[0050] In addition, the first cavity 12 at the edge of the end column area 15 needs to be set at intervals to ensure the continuity of concrete pouring and the integrity of the edge of the wall 17, and to avoid cracking or peeling of the concrete at the edge of the end column area 15 due to the excessive density of cavities.

[0051] It is important to note that the tie bars 11 come in two forms: one is a stirrup (a closed rectangular or square steel ring), and the other is a tie bar (a straight steel bar with hooks at both ends). When the first cavity 12 is provided at the tie bar, the first cavity 12 is located on the side of the tie bar away from its hooks, i.e., on the back side of the tie bar. This is because the hook portion of the tie bar needs to be anchored in the concrete to fully function. If the first cavity 12 is located on the hook side, the hook will lose its bond with the concrete, thus reducing the anchoring performance of the tie bar. By placing the first cavity 12 on the back side, it can be ensured that the hooks can still be reliably anchored in the solid concrete.

[0052] like Figure 2 As shown, when splicing two adjacent layers of partially hollow shear walls 1, the upper layer partially hollow shear wall 1 is hoisted onto the lower layer partially hollow shear wall 1. Lap bars 16 are installed as vertical connectors and inserted into the two corresponding first cavities 12 at each pair of upper and lower positions. A gap is left between the lap bars 16 and the inner wall of the first cavity 12 to facilitate alignment and adjustment during on-site installation, reducing the requirements for construction precision. The length of the lap bars 16 should meet the lap length requirements of the seismic design code, typically being several times the diameter of the reinforcing bar. The first cavities 12 of the upper and lower wall layers 17 should be aligned vertically to form continuous vertical channels for the lap bars 16 to pass through.

[0053] like Figure 4-6 As shown, this invention also provides a method for producing partially hollow shear walls. This method employs a horizontal casting process, which differs from traditional vertical formwork casting. Horizontal casting facilitates control over the accuracy of the cavity position, makes mold installation and removal easier, and reduces the requirements for concrete fluidity. The method includes the following steps:

[0054] S1: Tie the steel cage with tie bars 11 and place it horizontally on the horizontal formwork 2.

[0055] S2: Install horizontal mold 3. Horizontal mold 3 is a key tooling for forming the external contour of cavity and wall 17. Horizontal mold 3 includes steel plate outer mold 31, steel pipe inner mold 32 and protective box 33.

[0056] Inside the wall section 14 and the end column section 15: a steel pipe inner mold 32 is installed between every two rows of opposing tie bars 11. "Opposing" means that the hooks of the two rows of tie bars 11 are in opposite directions. The steel pipe inner mold 32 is located exactly between these two rows of tie bars 11, and will form the first cavity 12 after subsequent removal.

[0057] At the edge of the end column area 15: a steel pipe inner mold 32 is set at each row of tie bars 11, and these steel pipe inner molds 32 are arranged at intervals, that is, two rows of tie bars 11 are set between two adjacent steel pipe inner molds 32 to avoid the cavity in the edge area being too dense.

[0058] It should be noted that multiple pads are provided below each inner steel pipe mold 32 to support the inner steel pipe mold 32 away from the horizontal mold table 2.

[0059] like Figure 3 As shown, a protective box 33 is provided at each tie bar 11. The protective box 33 is a pentahedron with one open side, i.e., a cube box missing one face. The opening of the protective box 33 faces the inner mold 32 of the steel pipe that contacts the tie bar 11, and it abuts tightly against the outer wall of the inner mold 32. The function of the protective box 33 is to partially cover the tie bar 11, preventing the concrete from encasing the corresponding part of the tie bar 11 during pouring, thereby forming a second cavity 13 after demolding.

[0060] Specifically, such as Figure 6 As shown, a groove 331, corresponding to the position and shape of the tie bar 11, is provided on each of the two side walls of the opening of the protective box 33. During installation, the tie bar 11 is embedded into these two grooves 331, so that the protective box 33 can be firmly fixed on the tie bar 11 and is not easy to move. At the same time, the back of the protective box 33 (i.e., the closed five sides) faces the inside or edge of the wall 17, and after casting, it forms a cubic second cavity 13.

[0061] Finally, the steel plate outer formwork 31 is placed around the outside of the reinforcing cage to form the outer boundary of the entire pouring space. The steel plate outer formwork 31 should have sufficient rigidity to resist the lateral pressure of the concrete.

[0062] Important notes regarding the installation sequence: When installing the horizontal mold 3, first install the inner steel pipe mold 32 and protective box 33 sequentially from one side of the rebar cage to the other, and then install the outer steel plate mold 31. If the outer steel plate mold 31 is installed first, the inner steel pipe mold 32 and protective box 33 will not be able to be inserted into the rebar cage from the side. The sequential installation sequence ensures that each inner steel pipe mold 32 and protective box 33 can be accurately positioned.

[0063] S3: Within the area enclosed by the outer steel plate mold 31, the inner steel pipe mold 32, and the protective box 33, concrete is poured in one go to form the wall 17 of the partially hollow shear wall 1.

[0064] During pouring, appropriate slump and vibration techniques should be used to ensure that the concrete fills the space below the inner formwork 32 of the steel pipe, around the protective box 33, and all gaps between the reinforcing bars, avoiding quality defects such as honeycombing and voids. The width of the inner formwork 32 of the steel pipe should be set to no more than 600mm, so that the concrete can flow smoothly into the space below it and completely fill it under its own weight and vibration.

[0065] S4: After the concrete reaches a certain strength, proceed with the formwork removal. The formwork removal sequence is the reverse of the installation sequence.

[0066] First, remove the inner formwork of the steel pipe 32, such as Figure 5 As shown, the inner steel pipe mold 32 is composed of two steel pipes whose cross-sectional dimensions gradually increase from one end to the other, arranged coaxially opposite each other. The ends of the two steel pipes with larger cross-sectional dimensions face the outer side of the local hollow shear wall 1, i.e., the top or bottom end of the wall 17. Therefore, the two steel pipes can be axially pulled out from the top and bottom ends of the wall 17, respectively. For ease of applying force, hooks 34 are fixed at both ends of the inner steel pipe mold 32, allowing for traction using lifting equipment or a manual hoist. After the steel pipes are pulled out, the space they previously occupied forms the first cavity 12.

[0067] Then remove the outer formwork 31 of the steel plate, and the outer surface of the wall 17 is exposed.

[0068] The protective box 33 does not need to be disassembled and is ultimately left in the partially hollow shear wall 1 in the form of a pre-embedded steel plate. The space occupied by the protective box 33 forms the second cavity 13.

[0069] Preferably, the protective box 33 is made of lightweight steel sheet (such as galvanized steel sheet or stainless steel sheet), with a thickness of generally 0.5mm to 1.5mm. Its outer surface employs anchoring measures, such as welding, bonding, or integral molding, with multiple studs, indentations, or corrugations. After the wall 17 is poured, the concrete and the studs on the outer surface of the protective box 33 form a mechanical interlock, ensuring that the protective box 33 is firmly engaged with the wall 17 and will not loosen or fall off due to stress.

[0070] Preferably, the distance of the opening of the protective box 33 along the vertical wall 17 is less than the distance of the side wall of the inner steel pipe mold 32 along the vertical wall 17. Thus, when the opening end face of the protective box 33 abuts against the inner steel pipe mold 32, the protective box 33 is actually in a closed state, "pressed" by the inner steel pipe mold 32, preventing concrete slurry from seeping into the interior of the protective box 33 during the pouring process. If concrete enters the protective box 33, the second cavity 13 will be filled, losing its designed function.

[0071] like Figure 2 As shown, when splicing the upper and lower partial hollow shear walls 1, the lap bar 16 is first inserted halfway into the top of the first cavity 12 of the lower partial hollow shear wall 1, and the lap bar 16 is temporarily fixed so that its position remains unchanged. Then, concrete is poured into the first cavity 12 of the lower partial hollow shear wall 1. After the concrete reaches a certain strength, the upper partial hollow shear wall 1 is hoisted onto the lower partial hollow shear wall 1. During hoisting, the first cavity 12 of the upper partial hollow shear wall 1 is aligned with the first cavity 12 of the lower partial hollow shear wall 1 so that the lap bar 16 can be inserted from the bottom of the first cavity 12 of the upper partial hollow shear wall 1. Finally, concrete is poured into the first cavity 12 of the upper partial hollow shear wall 1 to complete the splicing of the upper and lower partial hollow shear walls 1.

[0072] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A partially hollow shear wall, characterized in that, It includes multiple cavities arranged along the extension direction of the local hollow shear wall (1) and multiple rows of tie bars (11); The cavity includes a first cavity (12) and a second cavity (13) that are connected. The first cavity (12) runs vertically through the local hollow shear wall (1), and the tie bars (11) in each row are arranged at intervals along the vertical direction and are all located at the same edge of the same first cavity (12); Each tie bar (11) is provided with a second cavity (13) located on the side of the tie bar (11) opposite to the first cavity (12).

2. The partially hollow shear wall according to claim 1, characterized in that, When splicing two adjacent layers of partially hollow shear walls (1), lap bars (16) are installed and inserted into the two first cavities (12) corresponding to each pair of upper and lower positions, with a gap between the lap bars (16) and the inner wall of the first cavity (12).

3. A method for producing a partially hollow shear wall according to any one of claims 1-2, characterized in that, Includes the following steps: S1: Tie a steel cage with tie bars (11) and place it horizontally on a horizontal formwork (2); S2: Install the horizontal mold (3). The horizontal mold (3) includes a steel plate outer mold (31), a steel pipe inner mold (32), and a protective box (33). The steel plate outer mold (31) surrounds the outside of the steel cage. In the wall area (14), a steel pipe inner mold (32) is set between every two rows of opposite tie bars (11). A protective box (33) is set at each tie bar (11). The protective box (33) is a pentahedron with one open side. The opening of the protective box (33) faces the steel pipe inner mold (32) that contacts the tie bar (11) and abuts against the steel pipe inner mold (32), covering the tie bar (11) part inside, so that the steel cage is contained in the space enclosed by the horizontal mold (3). S3: The area enclosed by the outer steel plate mold (31), the inner steel pipe mold (32) and the protective box (33) is integrally poured with concrete to form a partial hollow shear wall (1) wall (17). S4: After the concrete reaches a certain strength, the outer formwork of the steel plate (31) and the inner formwork of the steel pipe (32) are removed. The part of the inner formwork of the steel pipe (32) is removed to form the first cavity (12) of the local hollow shear wall (1), and the part of the protective box (33) forms the second cavity (13) of the local hollow shear wall (1).

4. The method for producing a partially hollow shear wall according to claim 3, characterized in that, When installing the horizontal mold (3) in step S2, first install the inner mold (32) of the steel pipe and the protective box (33) from one side of the steel cage to the other side, and then install the outer mold (31) of the steel plate.

5. The method for producing a partially hollow shear wall according to claim 3, characterized in that, The distance between the opening of the protective box (33) and the vertical wall (17) is less than the distance between the side wall of the abutting steel pipe inner mold (32) and the vertical wall (17).

6. The method for producing a partially hollow shear wall according to claim 3, characterized in that, The two side walls of the opening of the protective box (33) are respectively provided with a groove (331) that corresponds to the position and is adapted to the shape of the tie bar (11) so as to embed the tie bar (11).

7. The method for producing a partially hollow shear wall according to claim 3, characterized in that, When removing the horizontal mold (3) in step S4, first remove the inner mold of the steel pipe (32), and then remove the outer mold of the steel plate (31). The inner formwork (32) is a structure consisting of two steel pipes with continuously increasing cross-sectional dimensions from one end to the other, which are coaxially arranged opposite each other. When pouring concrete, the two steel pipes in one inner formwork (32) have their larger cross-sectional dimensions facing the outside of the local hollow shear wall (1) so that when the inner formwork (32) is removed, the two steel pipes are pulled out from the top and bottom of the local hollow shear wall (1) respectively.

8. The method for producing a partially hollow shear wall according to claim 3, characterized in that, The width of the inner mold (32) of the steel pipe is not greater than 600mm.

9. The method for producing a partially hollow shear wall according to claim 3, characterized in that, Both ends of the inner mold (32) of the steel pipe are fixed with hooks (34).

Images