Double-sided laminated shear wall and construction method thereof

Abstract

The invention relates to the field of fabricated buildings, and particularly discloses a double-faced laminated shear wall and a construction method thereof. The double-sided laminated shear wall comprises a prefabricated outer acanthus, a prefabricated inner acanthus, a plurality of wallboard connecting pieces arranged between the prefabricated outer acanthus and the prefabricated inner acanthus, and cast-in-place concrete filled between the prefabricated outer acanthus and the prefabricated inner acanthus; and each wallboard connecting piece comprises at least three steel bars and corrugated steel plates which are fully paved and fixed between the adjacent steel bars. The structure is suitable for overground and underground structure walls, concrete applied to the underground structure walls and the cavity can be poured into a whole, arrangement of horizontal construction joints is reduced, water leakage and water seepage of the basement external wall panel can be effectively prevented, and the waterproof performance of the structure walls is improved. The steel consumption can be effectively reduced, steel is saved, the occupied space can be reduced through scattered arrangement, on-site concrete pouring and steel reinforcement cage arrangement at the connecting position are facilitated, the ductility of the spliced shear wall is improved, and the spliced shear wall is suitable for earthquake fortification areas.

Description

Technical Field

[0001] The invention relates to the field of prefabricated buildings, and in particular to a double-sided composite shear wall and a construction method thereof. Background Art

[0002] As one of the core components of prefabricated buildings, the performance and construction efficiency of prefabricated shear walls directly affect the stability and construction period of the entire building structure. Traditional prefabricated shear walls mostly use sleeve grouting technology to connect precast concrete wall panels. Although it has improved the construction efficiency to a certain extent, it has many shortcomings. First, the sleeve grouting technology requires a large amount of steel, which not only increases the material cost, but also increases resource consumption and environmental pressure. Secondly, the sleeve grouting connection method takes up a lot of space, which is not conducive to the arrangement of steel cages in the core cast-in-place area, and limits the flexibility and seismic performance of the shear wall. In addition, since the connection quality of the sleeve grouting is difficult to guarantee, problems such as loose connection and leakage are prone to occur, affecting the stability and durability of the entire wall.

[0003] In response to these problems, the industry has begun to explore more efficient and economical connection methods. As a new type of prefabricated shear wall structure, the composite shear wall has gradually attracted widespread attention. The composite shear wall is composed of two layers of prefabricated concrete slabs connected by various structural structures or connectors. It has a middle cavity. After on-site installation, concrete is poured to fill the middle cavity to form a complete shear wall. Compared with the traditional sleeve grouting technology, the composite shear wall has the advantages of light weight, high lifting efficiency, good joints, and convenient fault tolerance. In particular, the double-sided composite shear wall, both sides of which are prefabricated concrete slabs, connected in the middle by connectors, not only improves the construction efficiency, but also enhances the overall stability and seismic performance of the wall.

[0004] At present, my country mainly uses continuously arranged steel trusses to connect two layers of precast concrete slabs. This connection method has the disadvantages of large steel consumption, large space occupation, and inconvenience in arranging the steel cage connection in the core cast-in-place area. Therefore, how to improve or solve the connection method of precast concrete slabs is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a double-sided composite shear wall connected by steel rods and corrugated steel plates and a construction method thereof. The present invention is applicable to both above-ground and underground structural walls. For underground structural walls, the concrete in the cavity can be poured as a whole, reducing the setting of horizontal construction joints, effectively preventing water leakage and seepage of the basement exterior wall panels, and improving the waterproof performance of the structural wall. It can effectively reduce the amount of steel used and save steel materials. The dispersed arrangement can reduce the occupied space, facilitate the pouring of on-site concrete and the arrangement of steel cages at the connection parts, improve the ductility of the spliced ​​shear wall, and is suitable for earthquake-resistant areas.

[0006] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0007] On the one hand, the present invention provides a double-sided composite shear wall, including a prefabricated outer blade plate, a prefabricated inner blade plate, a plurality of wall panel connectors arranged between the prefabricated outer blade plate and the prefabricated inner blade plate, and cast-in-place concrete filled between the prefabricated outer blade plate and the prefabricated inner blade plate; each of the wall panel connectors includes at least three steel bars and a corrugated steel plate fully fixed between adjacent steel bars.

[0008] As a further optimization scheme of the present invention, a first steel mesh is laid in the prefabricated outer blade, and frame steel bars are arranged in the prefabricated inner blade; one end of the steel rod is fixedly connected to the first steel mesh, and the other end is fixedly connected to the frame steel bars.

[0009] As a further optimization solution of the present invention, the first steel mesh is composed of a first horizontal steel bar and a first vertical steel bar, and one end of the steel rod is fixedly connected to the first horizontal steel bar.

[0010] As a further optimization scheme of the present invention, both ends of the steel rod extend horizontally outward to form a fixing portion, and the fixing portions at both ends are fixedly connected to the first horizontal steel bar and the vertical steel bar respectively.

[0011] As a further optimization solution of the present invention, the end of the fixing portion extends vertically inward or extends obliquely inward toward a side close to the straight line segment to form a clamping portion.

[0012] As a further optimization scheme of the present invention, a plurality of the wall panel connectors are evenly spaced apart in the horizontal and vertical directions of the double-sided composite shear wall, and the spacing between adjacent wall panel connectors is 150-1000 mm.

[0013] As a further optimization solution of the present invention, the plurality of steel rods are arranged in parallel and equidistantly, and are all located in the same plane, which is a vertical plane.

[0014] As a further optimization solution of the present invention, a second steel mesh is laid in the prefabricated inner leaf plate, and the second steel mesh is composed of a second horizontal steel bar and a second vertical steel bar.

[0015] As a further optimization solution of the present invention, the steel rods and the corrugated steel plates are arranged perpendicular to the prefabricated outer blades and the prefabricated inner blades.

[0016] In another aspect, the present invention provides a construction method for a double-sided composite shear wall, the construction method comprising:

[0017] Step 1: prefabricate the first steel mesh, the second steel mesh, the wall panel connector and the erection steel bars in the factory;

[0018] Step 2: Setting up the template of the prefabricated outer blade and laying the first steel mesh;

[0019] Step 3: fix the wall panel connector on the first steel mesh, and fix the stand steel bar on the other end of the wall panel connector;

[0020] Step 4: Casting and curing the prefabricated outer blades;

[0021] Step 5: Support the template of the prefabricated inner leaf plate and lay the second steel mesh;

[0022] Step 6: Casting prefabricated inner blade plate;

[0023] Step 7: Before the concrete of the prefabricated inner blade plate begins to set, the prefabricated outer blade plate is turned over 180 degrees, and then the erecting steel bars are buckled on the prefabricated inner blade plate that has just been poured, and the erecting steel bars are pressed into the concrete of the prefabricated inner blade plate to a predetermined height, and the mold is closed to obtain the prefabricated wall panel;

[0024] Step 8: Send the prefabricated wall panels into the curing kiln for curing. After reaching the preset curing time at the set curing temperature, carry out strength testing. If qualified, they can be taken out.

[0025] Step 9: Transport the prefabricated wall panels to the construction site, hoist them to the designated location, connect them with other connecting components, then pour the cast-in-place concrete layer and cure them to the standard strength.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] The double-sided composite shear wall of the present invention adopts a wall panel connector formed by welding steel rods and corrugated steel plates, which replaces the steel truss in the traditional process and can effectively reduce the amount of steel used. At the same time, the fixed end of the steel rod is a straight hook or a curved hook, and one end can be directly fixed to the steel mesh, which can further reduce the amount of steel used and improve the stability and firmness of the overall structure of the composite shear wall.

[0028] The wall panel connector formed by welding steel rods and corrugated steel plates in the present invention has high rigidity and good stability, and can provide effective lateral restraint between the precast concrete panels on both sides, preventing the precast concrete panels on both sides of the concrete in the casting cavity from shifting, and solving the problems of precast concrete panel offset and slurry leakage during the concrete pouring process. By calculating and setting structural construction measures, the precast concrete panels on both sides can even be used as templates for cast-in-place concrete, which can reduce construction difficulty and construction costs and improve construction efficiency. When this composite shear wall structure is used for the exterior wall panels of the basement, the concrete in the cavity can be cast as a whole, reducing the setting of horizontal construction joints, and thus effectively preventing water leakage and seepage of the exterior wall panels of the basement.

[0029] The wall panel connector formed by welding steel bars and corrugated steel plates in the present invention has high rigidity and good integrity. It only needs to be arranged at even intervals, and occupies little space in the cast-in-place concrete cavity, which is conducive to the pouring and vibration of cast-in-place concrete. For the joints of two superimposed shear walls, it is convenient to arrange the connecting steel cage in the core cast-in-place area, provide a reliable connection for the two superimposed shear walls, improve the bending bearing capacity of the joints, improve the integrity of the superimposed shear walls, and reduce the risk of cracking at the joints, greatly improving the seismic performance of the superimposed shear walls.

[0030] The connector formed by welding steel bars and corrugated steel plates in the present invention can significantly improve the out-of-plane stiffness of the precast concrete slabs on both sides, can effectively control the deformation of the composite shear wall during the hoisting process, and ensure the stability and safety of the composite shear wall during the hoisting process.

[0031] In the present invention, wall panel connectors can be arranged or increased between the precast concrete panels on both sides according to the structural design and construction requirements. The wall panel connectors serve as wall reinforcements to ensure the overall working performance and seismic performance of the weak parts of the structure. To ensure that the concrete is poured from top to bottom, the wall panel connectors are arranged vertically along the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the double-sided composite shear wall of the present invention.

[0033] Figure 2 It is a three-dimensional schematic diagram of the wall panel connector of the present invention.

[0034] Figure 3 It is a structural schematic diagram of a specific embodiment of the steel rod connection of the present invention.

[0035] Figure 4 It is a structural schematic diagram of another specific embodiment of the steel rod connection of the present invention.

[0036] Numbers in the figure: 1-prefabricated outer blade; 11-first steel mesh; 2-prefabricated inner blade; 21-second steel mesh; 3-wall panel connector; 31-steel rod; 32-corrugated steel plate; 311-fixing part; 312-clamping part; 313-straight section; 4-cast-in-place concrete; 5-erecting steel bars. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only for exemplary description and cannot be understood as a limitation on this patent.

[0038] The present invention provides a double-sided composite shear wall, comprising a prefabricated outer blade 1, a prefabricated inner blade 2, a wallboard connector 3 and cast-in-place concrete 4. The prefabricated outer blade 1 and the prefabricated inner blade 2 are respectively provided with a first steel mesh 11 and a second steel mesh 21, the prefabricated inner blade 2 is provided with a vertical steel bar 5, the first steel mesh 11 is composed of a first horizontal steel bar and a first vertical steel bar, and the second steel mesh 21 is composed of a second horizontal steel bar and a second vertical steel bar.

[0039] In some examples, such as Figure 1 As shown, a plurality of wall panel connectors 3 are evenly spaced and connected between the prefabricated outer blade 1 and the prefabricated inner blade 2 in the horizontal direction and the vertical direction, and the spacing between two adjacent wall panel connectors 3 can be 150mm-1000mm. Each wall panel connector 3 includes three steel bars 31 and two corrugated steel plates 32 fully fixed between adjacent steel bars 31, and the steel bars 31 and the corrugated steel plates 32 are both arranged perpendicular to the prefabricated outer blade 1 and the prefabricated inner blade 2. One end of the steel bar 31 is fixedly connected to the first steel mesh 11, and the other end is fixedly connected to the stand steel bar 5.

[0040] Furthermore, if Figure 2 As shown, multiple steel bars 31 are arranged in parallel and equidistantly, and are all located in the same plane, which is a vertical plane. The diameter of the steel bars 31 can be 8mm-12mm, and the spacing is 100mm-150mm, which can be adjusted according to the spacing of the first steel mesh 11. Two corrugated steel plates 32 are fully spread between the three steel bars 31, and are fixedly connected to the steel bars 31 by welding. The length is the thickness of the cast-in-place concrete 4 plus 10mm, and is embedded in the precast concrete slabs on both sides by 5mm each.

[0041] It is understandable that the corrugated steel plate 32 uses a high-strength steel plate as a substrate, and the surface is formed into a unique wave pattern by roll forming, which increases the rigidity, bending resistance and stability of the steel plate. Compared with ordinary steel plates of the same thickness, the corrugated steel plate 32 can withstand a larger load without bending or deformation. Since the corrugated structure can provide additional strength, thinner steel plates can be used without affecting the overall performance, thereby reducing the overall weight of the material, reducing costs, and facilitating subsequent construction. The special geometric shape of the corrugated steel plate 32 helps to disperse stress, increase structural stability, and exhibits better elastic recovery characteristics under earthquakes or other dynamic loads, thereby improving the seismic performance of the building. After the corrugated steel plate 32 and the steel rod 31 are welded into a wall panel connector 3, the rigidity and stability of the wall panel connector 3 can be significantly improved, thereby providing an effective lateral restraint between the precast concrete slabs on both sides, and preventing the precast concrete slabs on both sides of the concrete in the casting cavity from shifting. It can improve the seismic performance of the composite shear wall and reduce the risk of cracking at the joints.

[0042] In some examples, such as Figure 1 As shown, both ends of the steel rod 31 extend outward horizontally to form a fixing portion 311, and the fixing portions 311 at both ends are respectively fixedly connected to the first horizontal steel bar and the vertical steel bar 5, and the fixing method is welding or binding.

[0043] It can be understood that the fixing portion 311, as an extension of the end of the steel rod 31, is mainly used to firmly connect the first steel mesh 11 (especially the first horizontal steel bar) in the prefabricated outer blade 1 and the erection steel bar 5 in the prefabricated inner blade 2. This connection can be achieved by welding or binding, etc., in order to ensure the integrity and stability between the wall panel connector 3 and the prefabricated concrete slab. The existence of the fixing portion 311 enables the wall panel connector 3 to effectively transmit shear force and tension, thereby enhancing the overall structural performance of the double-sided composite shear wall.

[0044] In some examples, such as Figure 3 As shown, the end of the fixing portion 311 extends vertically inward to form a clamping portion 312. In other embodiments, such as Figure 4 As shown, the end of the fixing portion 311 extends inwardly toward the side close to the straight section 313 to form a clamping portion 312 .

[0045] It is understandable that the clamping portion 312 is a further extension or deformation of the end of the fixing portion 311 (such as extending vertically inward or extending obliquely inward toward the side close to the straight section 313), and its main function is to provide a more reliable fixing effect when connected to the steel bar. The design of the clamping portion 312 can increase the strength and stability of the connection point and prevent connection failure during the force-bearing process. Especially when welding with steel bars, the clamping portion 312 can provide a more stable welding interface, which helps to ensure the welding quality. In addition, the clamping portion 312 can also prevent the steel bars from shifting or falling off during the pouring of concrete to a certain extent. The fixing portion 311 and the clamping portion 312 play a vital role in the wall panel connector 3 of the double-sided composite shear wall. They jointly ensure the firm connection and overall stability between the wall panel connector 3 and the precast concrete slab, thereby improving the structural performance and seismic performance of the double-sided composite shear wall.

[0046] In some examples, the cast-in-place concrete 4 may be ordinary concrete or self-compacting concrete. After the prefabricated components are delivered from the factory to the construction site, they are hoisted and positioned, connected to the components on site, and then the cast-in-place concrete 4 is poured between the prefabricated outer blade 1 and the prefabricated inner blade 2 and cured to a standard strength.

[0047] In some examples, a construction method of a double-sided composite shear wall connected by steel rods and corrugated steel plates includes the following steps:

[0048] Step 1: prefabricate the first steel mesh 11, the second steel mesh 21, the wall panel connector 3, and the erection steel bars 5 in a factory;

[0049] Step 2: Support the template of the prefabricated outer blade 1, pass the template through the cleaning machine, remove the accumulated materials on the template and spray the demoulding agent, install the embedded plate according to the design requirements, grab the steel skeleton by the manipulator, hoist the first steel mesh 11 as a whole onto the bottom template, and preliminarily adjust and place the first steel mesh 11 according to the position;

[0050] Step 3: Set the wall panel connector 3 on the first steel mesh 11, weld or tie the two ends of the steel bar 31 to the first horizontal steel bar and the vertical steel bar 5, and install the embedded hanging parts;

[0051] Step 4: The pallet with completed steel bar binding and embedded parts installation is sent to the material placing station, and the prefabricated outer blade 1 is cast by the material placing machine and immediately sent to the curing kiln for steam curing. After the curing time is reached, it is taken out from the curing kiln and strength tested. Only when it is qualified can it be turned over and molded;

[0052] Step 5: Support the template of the prefabricated inner blade 2, the template passes through the cleaning machine, removes the accumulated materials on the template and sprays the demoulding agent, installs the embedded plate according to the design requirements, grabs the steel skeleton by the manipulator, hoists the second steel mesh 21 as a whole onto the bottom template, and preliminarily adjusts and places the second steel mesh 21 according to the position;

[0053] Step 6: The pallet with completed reinforcement binding and embedded parts installation is sent to the material placing station, and the material placing machine completes the pouring of the prefabricated inner blade 2;

[0054] Step 7: Before the concrete of the prefabricated inner blade 2 begins to set, the prefabricated outer blade 1 is turned 180 degrees, the erecting steel bars 5 and part of the wall panel connectors 3 are buckled on the prefabricated inner blade 2 that has just been poured, and the erecting steel bars 5 are pressed into the concrete of the prefabricated inner blade 2 to a predetermined height, and the mold is closed to obtain a prefabricated wall panel;

[0055] Step 8: Send the prefabricated wall panels to the curing kiln for curing. After the preset curing time is reached at the set curing temperature, the strength test is carried out and the panels can be taken out after passing the test.

[0056] Step 9: Transport the prefabricated wall panels to the construction site, hoist them to the designated location, connect them with other connecting components, then pour the cast-in-place concrete layer and cure them to the standard strength.

[0057] In terms of construction method, the construction method of the double-sided composite shear wall of the present invention has the following characteristics:

[0058] Factory prefabrication: All components, including the first steel mesh, the second steel mesh, the wall panel connectors, the erection steel bars, etc., are prefabricated in the factory. This ensures the accuracy and quality of the components while reducing the complexity of on-site construction.

[0059] Step-by-step construction: The construction steps are clear and concise, first prefabricate the outer blade, then prefabricate the inner blade, and finally close the mold and pour the cast-in-place concrete. Each step is carefully designed and strictly controlled to ensure the stability and safety of the overall structure.

[0060] Efficient hoisting: After the prefabricated wall panels are manufactured in the factory, they can be directly transported to the construction site for hoisting. Since the wall panel connectors are welded with steel rods and corrugated steel plates, they have greater rigidity and stability, so they are not easily deformed during the hoisting process, ensuring the safety and efficiency of the construction.

[0061] Simplified on-site operation: The vertical design of the wall panel connector makes it easier to pour and vibrate the cast-in-place concrete. At the same time, the wall panel connector, as the wall tie steel bar, also simplifies the connection of steel bars on site and increases the construction speed. By turning the prefabricated outer blade 180° and joining the mold with the prefabricated inner blade, the construction steps are simplified and the construction difficulty is reduced.

[0062] High-quality curing: Precast wall panels require curing both in the factory and on the construction site to ensure that the concrete reaches the predetermined strength. The curing process is carried out strictly in accordance with standards to ensure the quality and durability of the overall structure.

[0063] Flexible application: This method is not only applicable to above-ground structural walls, but also to underground structural walls. For underground structural walls, the concrete in the cavity can be poured as a whole, reducing the setting of horizontal construction joints, thereby effectively preventing water leakage and seepage from the basement exterior wall panels and improving the waterproof performance of the structural walls.

[0064] In summary, the construction method of the double-sided composite shear wall of the present invention has the characteristics of high efficiency, precision, safety, stability, etc., and is suitable for various construction scenes, especially buildings that require high seismic resistance and waterproof performance.

[0065] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. Those skilled in the art may make some modifications, supplements or use similar methods instead without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A double-sided composite shear wall, characterized in that: The invention comprises a prefabricated outer blade plate (1), a prefabricated inner blade plate (2), a plurality of wall panel connectors (3) arranged between the prefabricated outer blade plate (1) and the prefabricated inner blade plate (2), and cast-in-place concrete (4) filled between the prefabricated outer blade plate (1) and the prefabricated inner blade plate (2); each of the wall panel connectors (3) comprises at least three steel bars (31) and a corrugated steel plate (32) fully fixed between adjacent steel bars (31).

2. The double-sided composite shear wall according to claim 1, characterized in that: A first steel mesh sheet (11) is laid inside the prefabricated outer blade (1), and a frame steel bar (5) is arranged inside the prefabricated inner blade (2); one end of the steel bar (31) is fixedly connected to the first steel mesh sheet (11), and the other end is fixedly connected to the frame steel bar (5).

3. The double-sided composite shear wall according to claim 2, characterized in that: The first steel mesh (11) is composed of a first horizontal steel bar and a first vertical steel bar, and one end of the steel rod (31) is fixedly connected to the first horizontal steel bar.

4. The double-sided composite shear wall according to claim 3, characterized in that: Both ends of the steel bar (31) extend outward horizontally to form fixing portions (311), and the fixing portions (311) at both ends are fixedly connected to the first horizontal steel bar and the vertical steel bar (5) respectively.

5. The double-sided composite shear wall according to claim 4, characterized in that: The end of the fixing portion (311) extends vertically inwards or extends obliquely inwards towards a side close to the straight section (313) to form a clamping portion (312).

6. The double-sided composite shear wall according to claim 1, characterized in that: A plurality of the wall panel connectors (3) are evenly spaced apart in the horizontal and vertical directions of the double-sided composite shear wall, and the spacing between adjacent wall panel connectors (3) is 150-1000 mm.

7. The double-sided composite shear wall according to claim 1, characterized in that: The plurality of steel rods (31) are arranged in parallel at equal distances and are all located in the same plane, which is a vertical plane.

8. The double-sided composite shear wall according to claim 1, characterized in that: A second steel mesh (21) is laid inside the prefabricated inner blade (2), and the second steel mesh (21) is composed of second horizontal steel bars and second vertical steel bars.

9. The double-sided composite shear wall according to claim 1, characterized in that: The steel rods (31) and the corrugated steel plates (32) are both arranged perpendicular to the prefabricated outer blade plates (1) and the prefabricated inner blade plates (2).

10. A construction method for a double-sided composite shear wall according to any one of claims 1 to 9, characterized in that: The construction method comprises: Step 1: prefabricate the first steel mesh (11), the second steel mesh (21), the wall panel connector (3) and the erection steel bars (5) in a factory; Step 2: Setting up the template of the prefabricated outer blade (1) and laying the first steel mesh (11); Step 3: fix the wall panel connector (3) on the first steel mesh (11), and fix the stand steel bar (5) on the other end of the wall panel connector (3); Step 4: Casting the prefabricated outer blade (1) and curing; Step 5: Setting up the template of the prefabricated inner blade plate (2) and laying the second steel mesh (21); Step 6: Casting the prefabricated inner blade plate (2); Step 7: Before the concrete of the prefabricated inner blade plate (2) begins to set, the prefabricated outer blade plate (1) is turned over 180 degrees, and then the erection steel bars (5) are buckled on the prefabricated inner blade plate (2) that has just been poured, and the erection steel bars (5) are pressed into the concrete of the prefabricated inner blade plate (2) to a predetermined height, and the mold is closed to obtain a prefabricated wall panel; Step 8: Send the prefabricated wall panels into the curing kiln for curing. After reaching the preset curing time at the set curing temperature, carry out strength testing. If qualified, they can be taken out. Step 9: Transport the prefabricated wall panels to the construction site, hoist them to the designated location, connect them with other connecting components, then pour the cast-in-place concrete layer and cure them to the standard strength.

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