Method for manufacturing multi-layer steel tube concrete edge-restrained composite shear wall

Abstract

The application discloses a kind of multi-layer steel pipe concrete edge restraint composite shear wall and preparation method thereof, belong to the field of prefabricated building.The application realizes the integral prefabrication of rectangular steel pipe and multi-layer composite shear wall, which has large overall stiffness, is convenient for transportation and hoisting, can realize the integral hoisting of multi-layer wallboard during construction, reduces the vertical deviation of multi-layer wallboard, has simple process, and quality is easy to control.During preparation, after the inner leaf plate is turned over and placed on the supporting member, it is not necessary to set cavity formwork in the cavity, which avoids the operation of removing the cavity formwork and improves production efficiency.The rectangular steel pipe is welded with horizontal steel bars, the connection is reliable, and the force is transmitted directly.The two side rectangular steel pipes are used as outer leaf plate side molds and are integrally poured with outer leaf plates, which saves the side molds of outer leaf plates, has simple process, saves time and effort, solves the gap between rectangular steel pipe and inner and outer leaf plates, eliminates the joint treatment between rectangular steel pipe and composite shear wall, avoids the leakage of post-cast concrete on site, and has better overall performance.

Description

Technical Field

[0001] This invention relates to the field of prefabricated buildings, and in particular to a method for preparing a multi-layer steel-concrete composite shear wall with edge restraint. Background Technology

[0002] The precast concrete composite shear wall consists of a precast part and a cast-in-place part. The precast part is a component with a cavity in the middle, formed by connecting two layers of precast reinforced concrete panels (referred to as "inner leaf panel" and "outer leaf panel") with connectors. The connectors of the precast part include, but are not limited to, lattice steel bars (steel truss), steel sections or steel strips, etc. The cavity in the precast part is used for on-site concrete pouring. The poured concrete can be integrated with the precast part to bear the load as a whole, and finally form an integral precast concrete composite shear wall.

[0003] Steel-concrete composite shear wall with edge restraint is an improvement on traditional precast concrete composite shear wall. It connects the two ends of the traditional precast concrete composite shear wall to rectangular steel tubes, which are used as the restraint (structural) edge members of the shear wall. For an example of steel-concrete composite shear wall with edge restraint, see Chinese patent document CN 105569224 A.

[0004] The existing method for constructing a steel-concrete composite shear wall with edge restraint is as follows: First, the steel mesh of the inner leaf plate is fabricated, and the horizontal reinforcement of the inner leaf plate's steel mesh is welded to rectangular steel pipes with studs on both sides. Then, the connectors for the inner and outer leaf plates are installed on the steel mesh of the inner leaf plate. Next, the concrete molds at both ends of the rectangular steel pipes are installed, the concrete for the inner leaf plate is poured and vibrated to ensure compaction. Then, a hollow formwork (polystyrene board) is laid on top of the inner leaf plate, the steel mesh of the outer leaf plate is placed, and its horizontal reinforcement is welded to the rectangular steel pipes on both sides. Finally, the concrete for the outer leaf plate is poured and vibrated to ensure compaction, and after curing to the specified strength, the formwork is removed, the formwork at both ends of the rectangular steel pipes is removed, and the intermediate infill formwork is removed, thus completing the construction.

[0005] The above method enables the overall fabrication of steel-concrete composite shear walls with edge restraint. However, after fabrication, it is difficult to remove the internal cavity template, resulting in low fabrication efficiency. Furthermore, the connection between the rectangular steel pipe and the composite shear wall is achieved by using studs, which is cumbersome and costly.

[0006] In addition, existing steel-concrete composite shear walls with edge restraint are all single-layer prefabricated. When constructing multi-story and high-rise buildings on site, the steel-concrete composite shear walls with edge restraint need to be hoisted layer by layer. The amount of on-site welding of steel pipes is large, making it impossible to hoist multi-layer steel-concrete composite shear walls as a whole. Furthermore, hoisting layer by layer not only involves complicated on-site construction procedures, but also easily leads to vertical deviations of multi-layer wall panels. Summary of the Invention

[0007] This invention provides a method for preparing multi-layer steel-tube concrete edge-constrained composite shear walls, realizing the overall prefabrication of multi-layer steel-tube concrete edge-constrained composite shear walls. These walls have high overall rigidity, are convenient for transportation and hoisting, reduce vertical deviation of multi-layer wall panels during construction, have simple procedures, are easy to control in terms of quality, do not require the setting of cavity templates during preparation, have high production efficiency, are simple to operate, and have low cost.

[0008] The technical solution provided by this invention is as follows:

[0009] A multi-layer steel-tube concrete edge-constrained composite shear wall includes an inner leaf plate, an outer leaf plate, at least one connector, and two rectangular steel tubes, wherein:

[0010] The inner blade plate includes an inner blade plate steel mesh and inner blade plate concrete. The inner blade plate steel mesh includes inner blade plate horizontal steel bars and inner blade plate vertical steel bars. The inner blade plate vertical steel bars are arranged continuously along the height direction of the inner blade plate. The inner blade plate concrete is interrupted at the interlayer position to form an inner blade plate interlayer gap. The inner blade plate vertical steel bars pass through the inner blade plate interlayer gap. There are no inner blade plate horizontal steel bars at the inner blade plate interlayer gap.

[0011] The outer leaf plate includes an outer leaf plate steel mesh and outer leaf plate concrete. The outer leaf plate steel mesh includes outer leaf plate horizontal steel bars and outer leaf plate vertical steel bars. The outer leaf plate vertical steel bars are arranged continuously along the height direction of the outer leaf plate. The outer leaf plate concrete is interrupted at the interlayer position to form an outer leaf plate interlayer gap. The outer leaf plate vertical steel bars pass through the outer leaf plate interlayer gap. There are no outer leaf plate horizontal steel bars at the outer leaf plate interlayer gap.

[0012] The inner blade and the outer blade are arranged opposite each other at a certain distance. The connector is located between the inner blade and the outer blade, and both ends of the connector are fixedly connected to the inner blade and the outer blade, respectively. Two rectangular steel pipes are fixedly connected to both sides of the inner blade and the outer blade in the width direction, and the rectangular steel pipes are arranged along the height direction of the inner blade and the outer blade.

[0013] Furthermore, the connecting component is a steel truss, structural steel, or steel plate / strip.

[0014] Furthermore, the two ends of the connector are respectively anchored into the inner blade plate and the outer blade plate.

[0015] Furthermore, the top end of the rectangular steel pipe extends upward beyond the top ends of the inner and outer blades, and the bottom end of the rectangular steel pipe extends downward beyond the bottom ends of the inner and outer blades.

[0016] A method for preparing a multi-layer steel-tube concrete edge-constrained composite shear wall, the method comprising:

[0017] S1: The inner leaf plate steel mesh is made according to the design dimensions of the inner leaf plate. The vertical steel bars of the inner leaf plate are arranged along the height direction of the inner leaf plate. The horizontal steel bars of the inner leaf plate are not arranged at the interlayer gap of the inner leaf plate.

[0018] The width of the inner blade plate is set to be smaller than the width of the outer blade plate by a certain value.

[0019] S2: Fix the connector to the inner leaf plate steel mesh, place the inner leaf plate steel mesh and the connector as a whole on the mold table, and position the connector above the inner leaf plate steel mesh;

[0020] S3: Set up an inner leaf plate mold around the inner leaf plate steel mesh according to the design dimensions of the inner leaf plate, set up interlayer templates at the interlayer gaps of the inner leaf plate, pour inner leaf plate concrete, and remove the inner leaf plate mold and interlayer templates after curing to the specified strength.

[0021] S4: Fabricate the outer leaf plate steel mesh according to the design dimensions of the outer leaf plate, wherein the vertical steel bars of the outer leaf plate are arranged along the height direction of the outer leaf plate, and the horizontal steel bars of the outer leaf plate are not arranged at the interlayer gaps of the outer leaf plate.

[0022] S5: Rectangular steel pipes are set on both sides of the outer leaf plate steel mesh, and the two ends of the horizontal steel bars of the outer leaf plate are welded to the rectangular steel pipes. Support members are welded at a set position on the outer surface of the inner wall of the rectangular steel pipes.

[0023] S6: Place the outer leaf plate steel mesh and the rectangular steel pipe as a whole onto the formwork, set up the outer leaf plate end formwork, set up the interlayer formwork at the interlayer gap of the outer leaf plate, and use the rectangular steel pipe as the side formwork of the outer leaf plate to pour the outer leaf plate concrete.

[0024] S7: Rotate the inner leaf plate and connector as a whole by 180°, place the two ends of the width of the inner leaf plate on the support, and anchor the connector into the poured outer leaf plate concrete at a set distance. Vibrate the outer leaf plate concrete to compact it, and after curing it to the specified strength, remove the outer leaf plate end formwork and interlayer formwork.

[0025] The support member should be positioned such that after the two ends of the inner leaf plate are placed on the support member, the top surface of the inner leaf plate is flush with the top surface of the rectangular steel pipe.

[0026] S8: Fill the gap between the inner leaf plate and the rectangular steel pipe with grout to seal the gap, thus completing the preparation of the multi-layer steel pipe concrete edge-constrained composite shear wall.

[0027] Furthermore, in S7, the bottom surfaces at both ends of the inner leaf plate rest on the top surface of the support member.

[0028] Furthermore, in S1, the two ends of the horizontal reinforcing bars of the inner leaf plate extend outward by a set length from both sides of the width of the inner leaf plate according to the design dimensions, and the extended part of the horizontal reinforcing bars of the inner leaf plate is covered with a protective sleeve.

[0029] S3 further includes: removing the protective sleeve after curing to the specified strength;

[0030] The S7 further includes: placing the protruding portion of the horizontal reinforcing bar of the inner leaf plate on the top surface of the support member, and welding the protruding portion of the horizontal reinforcing bar of the inner leaf plate to the support member.

[0031] Furthermore, S1 also includes: welding a connecting plate to each end of the horizontal reinforcing bar of the inner leaf plate, wherein the thickness and height of the connecting plate are equal to the thickness and height of the inner leaf plate in the design dimensions, respectively;

[0032] In S3, when setting up the inner leaf plate mold around the inner leaf plate steel mesh, the inner leaf plate end mold is set up, and the connecting plate is used as the inner leaf plate side mold.

[0033] The S7 further includes: placing the bottom surfaces of the connecting plates at both ends of the width of the inner leaf plate on the top surface of the support member, and welding the connecting plates to the support member.

[0034] Furthermore, the connecting plate includes a first vertical edge and a first horizontal edge. The first vertical edge is welded to both ends of the horizontal reinforcing bar of the inner leaf plate, and the first vertical edge is located on both ends of the width of the inner leaf plate. The first horizontal edge is located on the top surface of the inner leaf plate before flipping, and the top surface of the first horizontal edge is flush with the top surface of the inner leaf plate before flipping.

[0035] Furthermore, the material of the interlayer template is rubber, and the interlayer template is formed by splicing an upper template and a lower template together. The two opposite surfaces of the upper template and the lower template are provided with splicing positioning structures, and semi-circular grooves are opened on the two opposite surfaces of the upper template and the lower template.

[0036] When setting interlayer templates at the gaps between inner and outer leaf plates, the upper and lower templates are spliced ​​together from both sides of the vertical reinforcing bars of the inner or outer leaf plates to form interlayer templates. Positioning components for the interlayer templates are set on the template platform. The semi-circular grooves of the upper and lower templates are spliced ​​together to form through-reinforcement holes, and the vertical reinforcing bars of the inner or outer leaf plates are located in the through-reinforcement holes.

[0037] Furthermore, the support includes a second vertical side and a second horizontal side. The second vertical side is welded to the outer surface of the inner wall of the rectangular steel tube, and the second horizontal side is used to support the two ends of the width of the inner blade plate.

[0038] Furthermore, the slurry is a micro-expansion high-strength cement mortar or fine aggregate concrete.

[0039] The present invention has the following beneficial effects:

[0040] This invention first casts the inner leaf plate, using interlayer templates to achieve a multi-layer structure. Then, the outer leaf plate and rectangular steel pipe are cast as a whole, again using interlayer templates to achieve a multi-layer structure. The inner leaf plate is then flipped over, allowing the connectors to be anchored into the outer leaf plate concrete. Grout is then filled into the gap between the inner leaf plate and the rectangular steel pipe, achieving the overall prefabrication of the rectangular steel pipe and the multi-layer composite shear wall. This results in a prefabricated multi-layer steel pipe concrete edge-constrained composite shear wall with high overall rigidity, convenient transportation and hoisting. During construction, the multi-layer wall panels can be hoisted as a whole, reducing vertical deviation of the multi-layer wall panels. The process is simple and the quality is easy to control.

[0041] When constructing multi-layer steel-tube concrete edge-constrained composite shear walls, the inner leaf plates are flipped and placed on the supports, eliminating the need for cavity formwork and avoiding the operation of removing the cavity formwork, thus increasing production efficiency. The rectangular steel pipes are welded to the horizontal reinforcing bars, avoiding the cumbersome and costly process of stud connections, ensuring reliable connections and direct force transmission. The rectangular steel pipes on both sides serve as side molds for the outer leaf plates, integrally cast with the outer leaf plates, saving on side molds for the outer leaf plates, simplifying the process, and saving time and labor. Furthermore, this invention solves the problem of gaps between the rectangular steel pipes and the inner and outer leaf plates, eliminating the need for joint treatment between the rectangular steel pipes and the composite shear wall, preventing grout leakage during on-site pouring, and resulting in better overall performance. Attached Figure Description

[0042] Figure 1 This is a perspective view of the multi-layer steel-tube concrete edge-constrained composite shear wall of the present invention.

[0043] Figure 2 for Figure 1 The main view;

[0044] Figure 3 for Figure 2 Sectional view along axis AA;

[0045] Figure 4 for Figure 2 BB-direction sectional view;

[0046] Figure 5 A schematic diagram of the fabrication of the inner leaf plate;

[0047] Figure 6 Another schematic diagram of the preparation of the inner leaf plate;

[0048] Figure 7 Another schematic diagram of the preparation of the inner blade plate;

[0049] Figure 8 A schematic diagram of the fabrication of the outer leaf plate;

[0050] Figure 9 Another schematic diagram of the preparation of the outer blade plate;

[0051] Figure 10 For the reason Figure 5 inner leaf plate and Figure 8 A partial sectional view of a multi-layer steel-tube concrete edge-constrained composite shear wall made of outer leaf plates;

[0052] Figure 11 For the reason Figure 6 inner leaf plate and Figure 9 A partial sectional view of a multi-layer steel-tube concrete edge-constrained composite shear wall made of outer leaf plates;

[0053] Figure 12 For the reason Figure 7 inner leaf plate and Figure 8 A partial sectional view of a multi-layer steel-tube concrete edge-constrained composite shear wall made of outer leaf plates;

[0054] Figure 13 A schematic diagram showing the outer leaf plate after concrete has been poured.

[0055] Figure 14 This is a schematic diagram showing the inner blade plate being flipped over and placed onto the outer blade plate.

[0056] Figure 15 This is a construction diagram showing the interlayer gap of the outer leaf plate;

[0057] Figure 16 This is a schematic diagram of the interlayer template structure. Detailed Implementation

[0058] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0059] This invention provides a multi-layer steel-tube concrete edge-constrained composite shear wall, such as... Figure 1-4 As shown, it includes an inner blade plate 1, an outer blade plate 2, at least one connector 3, and two rectangular steel pipes 4, wherein:

[0060] The inner leaf plate 1 includes an inner leaf plate steel mesh 5 and an inner leaf plate concrete 6. The inner leaf plate steel mesh 5 includes inner leaf plate horizontal steel bars 7 and inner leaf plate vertical steel bars 8. The inner leaf plate vertical steel bars 8 are arranged along the height direction of the inner leaf plate 1. The inner leaf plate concrete 6 is interrupted at the inter-story position to form an inner leaf plate inter-story gap 9. The inner leaf plate inter-story gap 9 is a reserved gap between upper and lower floors, forming a multi-story inner leaf plate. The inner leaf plate vertical steel bars 8 pass through the inner leaf plate inter-story gap 9. There are no inner leaf plate horizontal steel bars 7 at the inner leaf plate inter-story gap 9.

[0061] The outer leaf plate 2 includes an outer leaf plate steel mesh 10 and an outer leaf plate concrete 11. The outer leaf plate steel mesh 10 includes outer leaf plate horizontal steel bars 12 and outer leaf plate vertical steel bars 13. The outer leaf plate vertical steel bars 13 are arranged along the height direction of the outer leaf plate 2. The outer leaf plate concrete 11 is interrupted at the inter-story position to form an outer leaf plate inter-story gap 14. The outer leaf plate inter-story gap 14 is a reserved gap between upper and lower floors, forming a multi-layer outer leaf plate structure. The outer leaf plate vertical steel bars 13 pass through the outer leaf plate inter-story gap 14. There are no outer leaf plate horizontal steel bars 12 at the outer leaf plate inter-story gap 14.

[0062] The inner blade 1 and the outer blade 2 are arranged opposite each other at a certain distance. The connector 3 is located between the inner blade 1 and the outer blade 2, and both ends of the connector 3 are fixedly connected to the inner blade 1 and the outer blade 2, respectively. The connector 3 can be in the form of a steel truss, structural steel, or steel plate strip. Both ends of the connector 3 can be anchored into the inner blade 1 and the outer blade 2, respectively, to achieve connection with the inner blade 1 and the outer blade 2.

[0063] Two rectangular steel pipes 4 are fixedly connected to the two sides of the inner blade plate 1 and the outer blade plate 2 in the width direction, and the rectangular steel pipes 4 are arranged along the height direction of the inner blade plate 1 and the outer blade plate 2. The rectangular steel pipes 4 form a cavity between the inner blade plate 1 and the outer blade plate 2 for the in-situ pouring of concrete during construction.

[0064] Traditional precast concrete composite shear walls cannot be precast into multi-story structures because multi-story structures require the concrete of the inner and outer leaf slabs to be broken at the inter-story locations to leave gaps between the upper and lower floors. This results in the gaps being connected only by steel bars (specifically, only by vertical steel bars) without concrete connections, leading to lower overall stiffness and making transportation and hoisting work very difficult. Therefore, traditional precast concrete composite shear walls cannot be precast into multi-story structures.

[0065] This invention designs a multi-story steel-concrete composite shear wall with edge restraint. The concrete of the inner and outer leaf plates is interrupted at the inter-story level, and the inter-story level is connected by the vertical reinforcement of the inner and outer leaf plates. Furthermore, the inner and outer leaf plates are connected on both sides by rectangular steel pipes, which serve as the restraint (structural) edge members of the shear wall, providing sufficient support stiffness for the multi-story structure. This allows for the overall prefabrication of the multi-story steel-concrete composite shear wall, resulting in high overall stiffness and convenient transportation and hoisting. When constructing two- or three-story low-rise buildings, the multi-story steel-concrete composite shear wall allows for the overall hoisting of multiple wall panels. Compared to hoisting wall panels layer by layer, this reduces vertical deviation of the multiple wall panels, simplifies the process, and makes quality control easier.

[0066] The top of the rectangular steel pipe 4 can extend upwards beyond the tops of the inner leaf plate 1 and the outer leaf plate 2, with an extension height equal to the floor slab thickness plus (10-20) mm. The bottom of the rectangular steel pipe 4 can extend downwards beyond the bottoms of the inner leaf plate 1 and the outer leaf plate 2, with an extension length of approximately 40-50 mm. This facilitates the connection of the upper and lower multi-layer steel pipe concrete edge-constrained composite shear walls at the floor slab, and provides space for welding the upper and lower rectangular steel pipes 4.

[0067] This invention also provides a method for preparing a multi-layer steel-tube concrete edge-constrained composite shear wall, such as... Figure 5-16 As shown, the method includes:

[0068] S1: Fabricate the inner leaf plate steel mesh 5 according to the design dimensions of the inner leaf plate 1. When arranging the mesh, make the vertical steel bars 8 of the inner leaf plate run along the height direction of the inner leaf plate 1. The horizontal steel bars 7 of the inner leaf plate are not arranged at the interlayer gap 9 of the inner leaf plate.

[0069] The present invention requires that the width of the inner blade plate 1 be smaller than the width of the outer blade plate 2 by a certain value, and the specific value can be set according to the actual situation.

[0070] S2: Fix the connector 3 to the inner blade plate steel mesh 5. Specifically, the connector 3 can be fixed to the inner blade plate steel mesh 5 by welding or other methods. Then, place the inner blade plate steel mesh 5 and the connector 3 together on the mold table 15, so that the connector 3 is located above the inner blade plate steel mesh 5.

[0071] S3: According to the design dimensions of the inner leaf plate 1, erect the inner leaf plate mold around the inner leaf plate steel mesh 5, and set the interlayer formwork 16 at the interlayer gap 9 of the inner leaf plate. Pour the inner leaf plate concrete 6, and after curing to the specified strength, remove the inner leaf plate mold and the interlayer formwork 16. The interlayer formwork 16 causes the inner leaf plate concrete 6 to break, thus realizing the integral preparation of the multi-layer structure inner leaf plate 1. Figure 5-7 As shown.

[0072] S4: Make the outer leaf plate steel mesh 10 according to the design dimensions of the outer leaf plate 2. When arranging it, make the vertical steel bars 13 of the outer leaf plate be arranged along the height direction of the outer leaf plate 2, and the horizontal steel bars 12 of the outer leaf plate are not arranged at the interlayer gap 14 of the outer leaf plate.

[0073] S5: Rectangular steel pipes 4 are set on both sides of the outer leaf plate steel mesh 10. The two ends of the horizontal steel bar 12 of the outer leaf plate are welded to the rectangular steel pipes 4. Support members 17 are welded at the set positions on the outer surface of the inner wall of the rectangular steel pipes 4.

[0074] The support member 17 should be positioned such that after the two ends of the width of the inner leaf plate 1 in S6 are placed on the support member 17, the top surface of the inner leaf plate 1 is flush with the top surface of the rectangular steel pipe 4.

[0075] S6: Place the outer leaf plate steel mesh 10 and rectangular steel pipe 4 as a whole onto the formwork platform 15, erect the outer leaf plate end formwork 26, set up the interlayer formwork 16 at the interlayer gap 14 of the outer leaf plate, and use the rectangular steel pipe 4 as the side formwork of the outer leaf plate. Pour the outer leaf plate concrete 11. Figure 8-9 As shown in Figure 13.

[0076] This invention uses the rectangular steel pipes 4 on both sides as side molds for the outer leaf plate, integrally casting them with the outer leaf plate 2. This saves on the side molds for the outer leaf plate 2, simplifies the process, and saves time and labor. It also solves the problems of verticality deviation of the rectangular steel pipes 4 and gaps between the rectangular steel pipes 4 and the outer leaf plate 2, avoiding leakage of grout from the on-site poured concrete, resulting in better overall performance. Furthermore, an interlayer formwork 16 is set before pouring, causing the outer leaf plate concrete 11 to be interrupted at the interlayer formwork 16, thus obtaining a multi-layer structure for the outer leaf plate 2.

[0077] S7: Rotate the inner leaf plate 1 and connector 3 as a whole by 180°, place the two ends of the width of the inner leaf plate 1 on the support 17, and anchor the connector 3 into the poured outer leaf plate concrete 11 at a set distance, such as... Figure 14 As shown. After the outer leaf slab concrete 11 is vibrated and compacted, and cured to the specified strength, the outer leaf slab end formwork 26 and the inter-layer formwork 16 are removed, as follows. Figure 4 , 14 As shown.

[0078] When the connector 3 is a steel truss, steel section, or steel plate strip, the lower chord steel bar of the steel truss, the lower flange of the steel section, and the lower end of the steel plate strip are anchored into the poured outer leaf plate concrete 11.

[0079] S8: Fill the gap between the inner leaf plate 1 and the rectangular steel pipe 4 with micro-expansion high-strength cement mortar or fine stone concrete grout 18 to seal the gap, thus completing the preparation of the multi-layer steel pipe concrete edge-constrained composite shear wall. Figure 7 As shown.

[0080] The filling grout 18 ensures that there are no gaps between the rectangular steel pipe 4 and the outer leaf plate 2, preventing leakage of grout from the on-site poured concrete and avoiding structural exposure, resulting in a smooth and flat shear wall surface.

[0081] This invention first casts the inner leaf plate, using interlayer templates to achieve a multi-layer structure. Then, the outer leaf plate and rectangular steel pipe are cast as a whole, again using interlayer templates to achieve a multi-layer structure. The inner leaf plate is then flipped over, allowing the connectors to be anchored into the outer leaf plate concrete. Grout is then filled into the gap between the inner leaf plate and the rectangular steel pipe, achieving the overall prefabrication of the rectangular steel pipe and the multi-layer composite shear wall. This results in a prefabricated multi-layer steel pipe concrete edge-constrained composite shear wall with high overall rigidity, convenient transportation and hoisting. During construction, the multi-layer wall panels can be hoisted as a whole, reducing vertical deviation of the multi-layer wall panels. The process is simple and the quality is easy to control.

[0082] When constructing multi-layer steel-tube concrete edge-constrained composite shear walls, the inner leaf plates are flipped and placed on the supports, eliminating the need for cavity formwork and avoiding the operation of removing the cavity formwork, thus increasing production efficiency. The rectangular steel pipes are welded to the horizontal reinforcing bars, avoiding the cumbersome and costly process of stud connections, ensuring reliable connections and direct force transmission. The rectangular steel pipes on both sides serve as side molds for the outer leaf plates, integrally cast with the outer leaf plates, saving on side molds for the outer leaf plates, simplifying the process, and saving time and labor. Furthermore, this invention solves the problem of gaps between the rectangular steel pipes and the inner and outer leaf plates, eliminating the need for joint treatment between the rectangular steel pipes and the composite shear wall, preventing grout leakage during on-site pouring, and resulting in better overall performance.

[0083] In this invention, when casting the inner leaf plate 1 and the outer leaf plate 2, interlayer formwork 16 needs to be set at the interlayer gap 9 of the inner leaf plate and the interlayer gap 14 of the outer leaf plate. Because the interlayer gap 9 of the inner leaf plate and the interlayer gap 14 of the outer leaf plate have vertical reinforcing bars 8 of the inner leaf plate and vertical reinforcing bars 13 of the outer leaf plate, traditional formwork is difficult to set. In addition, there are rectangular steel pipes 4 on both sides of the interlayer gap 14 of the outer leaf plate, which restricts the removal of the formwork at the interlayer gap 14 of the outer leaf plate.

[0084] Therefore, the present invention sets the interlayer template 16 to a rubber material, and as follows: Figure 16 As shown, the interlayer template 16 is formed by splicing the upper template 19 and the lower template 20 together. The two opposite surfaces of the upper template 19 and the lower template 20 are provided with splicing and positioning structures 21 such as slots to achieve precise positioning when splicing the upper template 19 and the lower template 20.

[0085] Semi-circular grooves 22 are provided on the two opposite surfaces of the upper template 19 and the lower template 20. When the interlayer template 16 is set at the interlayer gap 9 of the inner leaf plate or the interlayer gap 14 of the outer leaf plate, the upper template 19 and the lower template 20 are spliced ​​inward from both sides of the vertical reinforcement 8 of the inner leaf plate or the vertical reinforcement 13 of the outer leaf plate to form the interlayer template 16. After the semi-circular grooves 22 of the upper template 19 and the lower template 20 are spliced, a through-reinforcement hole is formed. The vertical reinforcement 8 of the inner leaf plate or the vertical reinforcement 13 of the outer leaf plate is located in the through-reinforcement hole, ensuring that the vertical reinforcement 8 of the inner leaf plate or the vertical reinforcement 13 of the outer leaf plate can pass through smoothly.

[0086] This invention avoids the restriction imposed on the template by the vertical reinforcement 8 of the inner leaf plate or the vertical reinforcement 13 of the outer leaf plate by setting the interlayer template 16 into two parts that are spliced ​​together. Furthermore, the material of the interlayer template 16 is rubber, which has a certain degree of elasticity and can generate sufficient deformation during disassembly, so that the upper template 19 and the lower template 20 can be pulled out from the gap of the vertical reinforcement 8 of the inner leaf plate or the vertical reinforcement 13 of the outer leaf plate. The operation is simple, the disassembly is convenient, and it saves time, effort and money and has low cost.

[0087] The thickness of the interlayer template 16 can also be equal to the thickness of the interlayer gap 9 of the inner leaf plate or the interlayer gap 14 of the outer leaf plate. In this case, only one interlayer template 16 needs to be set in an interlayer gap 9 of the inner leaf plate or an interlayer gap 14 of the outer leaf plate to disconnect the inner leaf plate concrete 6 or the outer leaf plate concrete 11 at the set interval.

[0088] The thickness of the interlayer template 16 can also be less than the thickness of the interlayer gap 9 of the inner leaf plate or the interlayer gap 14 of the outer leaf plate. In this case, two interlayer templates 16 need to be set and positioned within one interlayer gap 9 of the inner leaf plate or the interlayer gap 14 of the outer leaf plate. A reserved gap of a set distance can be formed between the two interlayer templates 16. During pouring, the concrete 6 of the inner leaf plate or the concrete 11 of the outer leaf plate can be broken at the set interval.

[0089] When positioning the interlayer template 16, a positioning component 23 can be set on the mold table 15. The positioning component 23 can be an angle steel, welded to the mold table 15. After welding, the angle steel can be reused in the production of inner leaf plate 1 and outer leaf plate 2 of the same specification, such as... Figure 15 As shown.

[0090] As an improvement, in S7, after the inner blade plate 1 and the connecting member 3 are rotated 180° as a whole, the bottom surfaces of both ends of the width of the inner blade plate 1 can be directly placed on the top surface of the support member 17, such as... Figure 8 As shown, this method of construction is simple and quick.

[0091] At this point, the lengths of the horizontal reinforcement 7 and the vertical reinforcement 8 of the inner leaf plate are equal to the width and height of the inner leaf plate 1, respectively, as designed. Figure 5 As shown; the width of the inner leaf plate 1 is 5-10mm smaller than that of the outer leaf plate 2, the height difference between the top surface of the support member 17 and the top surface of the rectangular steel pipe 4 is equal to the thickness of the inner leaf plate 1, which is 50mm, the extension length of the support member 17 is 30mm, and the lower end of the connector 3 is anchored into the poured concrete of the outer leaf plate for 30mm.

[0092] As another improvement, in S1, the two ends of the horizontal reinforcing bars 7 in the inner leaf plate extend outward by a predetermined length from both sides of the width of the inner leaf plate 1 according to its design dimensions, such as... Figure 6 As shown; the 24 protruding parts of the horizontal reinforcing bars 7 in the inner leaf plate are fitted with protective sleeves.

[0093] The length of the protruding horizontal reinforcement 7 of the inner leaf plate is not less than 5 times the diameter of the horizontal reinforcement 7 of the inner leaf plate. The function of the protective sleeve is to prevent the protruding part 24 of the horizontal reinforcement 7 of the inner leaf plate from bonding with the poured inner leaf plate concrete 6. At this time, the width of the inner leaf plate 1 is 10mm smaller than that of the outer leaf plate 2.

[0094] Correspondingly, S3 also includes: removing the protective sleeve after curing to the specified strength. In S5, the height difference between the top surface of the support member 17 and the top surface of the rectangular steel pipe 4 is 30mm, and the extension length of the support member 17 is not less than 5.5 times the diameter of the horizontal reinforcing bar 7 of the inner leaf plate. Figure 9 As shown.

[0095] Correspondingly, S7 also includes: placing the protruding portion 24 of the inner leaf plate horizontal reinforcing bar 7 onto the top surface of the support member 17, and welding the protruding portion 24 of the inner leaf plate horizontal reinforcing bar 7 to the support member 17, so that the rectangular steel pipe 4 is reliably connected to the inner and outer leaf plate horizontal reinforcing bars 7 and 12, thereby improving the overall rigidity, such as Figure 11 As shown. At this point, the lower end of connector 3 is anchored 30mm into the poured outer leaf plate concrete.

[0096] As another improvement, S1 further includes: welding a connecting plate 25 to each end of the horizontal reinforcing bar 7 of the inner leaf plate, wherein the thickness and height of the connecting plate 25 are equal to the thickness and height of the inner leaf plate 1 as designed, such as... Figure 7 As shown.

[0097] Accordingly, in S3, when setting up the inner leaf plate mold around the inner leaf plate steel mesh 5, the inner leaf plate end mold is set up, and the connecting plate 25 is used as the inner leaf plate side mold. At this time, the width of the inner leaf plate 1 is 10mm smaller than that of the outer leaf plate 2.

[0098] In S5, the height difference between the top surface of the support member 17 and the top surface of the rectangular steel pipe 4 is equal to the thickness of the inner leaf plate 1, which is taken as 50mm. The extension length of the support member 17 is taken as 30mm. Figure 8 As shown.

[0099] Correspondingly, S7 also includes: placing the bottom surfaces of the connecting plates 25 at both ends of the width of the inner leaf plate 1 on the top surface of the support member 17, and welding the connecting plates 25 to the support member 17 together, so that the rectangular steel pipe 4 is reliably connected to the horizontal reinforcing bars 7 and 12 of the inner and outer leaf plates, thereby improving the overall rigidity, such as Figure 12 As shown. At this point, the lower end of connector 3 is anchored 30mm into the poured outer leaf plate concrete.

[0100] This invention does not limit the specific structural form of the connecting plate 25; for example, such as... Figure 7 As shown, the connecting plate 25 can be an angle steel, which includes a first vertical side and a first horizontal side. The first vertical side is welded to both ends of the horizontal steel bar 7 of the inner leaf plate, and the first vertical side is located on both ends of the width of the inner leaf plate 1. The first horizontal side is located on the top surface of the inner leaf plate 1 before flipping, and the top surface of the first horizontal side is flush with the top surface of the inner leaf plate 1 before flipping.

[0101] The aforementioned support member 17 can be an angle steel or a ribbed steel plate, such as... Figure 8 , 9As shown, it includes a second vertical side and a second horizontal side. The second vertical side is welded to the outer surface of the inner wall of the rectangular steel pipe 4, and the second horizontal side extends horizontally inward to support the two ends of the width of the inner leaf plate 1.

[0102] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for manufacturing a multi-story steel tube reinforced concrete edge-constrained composite shear wall, characterized by, The multi-layer steel-tube concrete edge-constrained composite shear wall includes an inner leaf plate, an outer leaf plate, at least one connector, and two rectangular steel tubes, wherein: The inner blade plate includes an inner blade plate steel mesh and inner blade plate concrete. The inner blade plate steel mesh includes inner blade plate horizontal steel bars and inner blade plate vertical steel bars. The inner blade plate vertical steel bars are arranged continuously along the height direction of the inner blade plate. The inner blade plate concrete is interrupted at the interlayer position to form an inner blade plate interlayer gap. The inner blade plate vertical steel bars pass through the inner blade plate interlayer gap. There are no inner blade plate horizontal steel bars at the inner blade plate interlayer gap. The outer leaf plate includes an outer leaf plate steel mesh and outer leaf plate concrete. The outer leaf plate steel mesh includes outer leaf plate horizontal steel bars and outer leaf plate vertical steel bars. The outer leaf plate vertical steel bars are arranged continuously along the height direction of the outer leaf plate. The outer leaf plate concrete is interrupted at the interlayer position to form an outer leaf plate interlayer gap. The outer leaf plate vertical steel bars pass through the outer leaf plate interlayer gap. There are no outer leaf plate horizontal steel bars at the outer leaf plate interlayer gap. The inner blade and the outer blade are arranged opposite each other at a certain distance. The connector is located between the inner blade and the outer blade, and both ends of the connector are fixedly connected to the inner blade and the outer blade, respectively. Two rectangular steel pipes are fixedly connected to both sides of the inner blade and the outer blade in the width direction, and the rectangular steel pipes are arranged along the height direction of the inner blade and the outer blade. The preparation method includes: S1: The inner leaf plate steel mesh is made according to the design dimensions of the inner leaf plate. The vertical steel bars of the inner leaf plate are arranged along the height direction of the inner leaf plate. The horizontal steel bars of the inner leaf plate are not arranged at the interlayer gap of the inner leaf plate. The width of the inner blade plate is set to be smaller than the width of the outer blade plate by a certain value. S2: Fix the connector to the inner leaf plate steel mesh, place the inner leaf plate steel mesh and the connector as a whole on the mold table, and position the connector above the inner leaf plate steel mesh; S3: Set up an inner leaf plate mold around the inner leaf plate steel mesh according to the design dimensions of the inner leaf plate, set up interlayer templates at the interlayer gaps of the inner leaf plate, pour inner leaf plate concrete, and remove the inner leaf plate mold and interlayer templates after curing to the specified strength. S4: Fabricate the outer leaf plate steel mesh according to the design dimensions of the outer leaf plate, wherein the vertical steel bars of the outer leaf plate are arranged along the height direction of the outer leaf plate, and the horizontal steel bars of the outer leaf plate are not arranged at the interlayer gaps of the outer leaf plate. S5: Rectangular steel pipes are set on both sides of the outer leaf plate steel mesh, and the two ends of the horizontal steel bars of the outer leaf plate are welded to the rectangular steel pipes. Support members are welded at a set position on the outer surface of the inner wall of the rectangular steel pipes. S6: Place the outer leaf plate steel mesh and the rectangular steel pipe as a whole on the formwork, set up the outer leaf plate end formwork, set up the interlayer formwork at the interlayer gap of the outer leaf plate, and use the rectangular steel pipe as the side formwork of the outer leaf plate to pour the outer leaf plate concrete. S7: Rotate the inner leaf plate and connector as a whole by 180°, place the two ends of the width of the inner leaf plate on the support, and anchor the connector into the poured outer leaf plate concrete at a set distance. Vibrate the outer leaf plate concrete to compact it, and after curing it to the specified strength, remove the outer leaf plate end formwork and interlayer formwork. The support member should be positioned such that after the two ends of the inner leaf plate are placed on the support member, the top surface of the inner leaf plate is flush with the top surface of the rectangular steel pipe. S8: Fill the gap between the inner leaf plate and the rectangular steel pipe with grout to seal the gap, and complete the preparation of the multi-layer steel pipe concrete edge-constrained composite shear wall; The interlayer template is made of rubber and is formed by splicing an upper template and a lower template together. The two opposite surfaces of the upper template and the lower template are provided with splicing and positioning structures, and semi-circular grooves are provided on the two opposite surfaces of the upper template and the lower template. When setting interlayer templates at the interlayer gaps of the inner leaf plates or the interlayer gaps of the outer leaf plates, the upper template and the lower template are spliced ​​together from both sides of the vertical reinforcement of the inner leaf plate or the vertical reinforcement of the outer leaf plate to form an interlayer template, and positioning components for the interlayer templates are set on the template platform. The semi-circular grooves of the upper template and the lower template are spliced ​​together to form through-reinforcement holes, and the vertical reinforcement of the inner leaf plate or the vertical reinforcement of the outer leaf plate is located in the through-reinforcement holes. The support includes a second vertical side and a second horizontal side. The second vertical side is welded to the outer surface of the inner wall of the rectangular steel pipe, and the second horizontal side is used to support the two ends of the width of the inner blade plate.

2. The production method according to claim 1, characterized by, The connecting component is a steel truss, structural steel, or steel plate / strip.

3. The preparation method according to claim 2, characterized in that, The two ends of the connector are respectively anchored into the inner blade and the outer blade.

4. According to the preparation method of claim 3, the top end of the rectangular steel pipe extends upward beyond the top ends of the inner blade plate and the outer blade plate, and the bottom end of the rectangular steel pipe extends downward beyond the bottom ends of the inner blade plate and the outer blade plate.

5. The method of any one of claims 1-4, wherein, In step S7, the bottom surfaces at both ends of the inner leaf plate rest on the top surface of the support member.

6. The production method according to claim 5, characterized by, In S1, the two ends of the horizontal steel bar of the inner leaf plate extend outward by a set length from both sides of the width of the inner leaf plate according to the design size, and the extended part of the horizontal steel bar of the inner leaf plate is covered with a protective sleeve. S3 further includes: removing the protective sleeve after curing to the specified strength; The S7 further includes: placing the protruding portion of the horizontal reinforcing bar of the inner leaf plate on the top surface of the support member, and welding the protruding portion of the horizontal reinforcing bar of the inner leaf plate to the support member.

7. The preparation method according to claim 5, characterized in that, The S1 further includes: welding a connecting plate to each end of the horizontal reinforcing bar of the inner leaf plate, wherein the thickness and height of the connecting plate are equal to the thickness and height of the inner leaf plate in the design dimensions, respectively; In S3, when setting up the inner leaf plate mold around the inner leaf plate steel mesh, the inner leaf plate end mold is set up, and the connecting plate is used as the inner leaf plate side mold. The S7 further includes: placing the bottom surfaces of the connecting plates at both ends of the width of the inner leaf plate on the top surface of the support member, and welding the connecting plates to the support member.

8. The preparation method according to claim 7, characterized in that, The connecting plate includes a first vertical edge and a first horizontal edge. The first vertical edge is welded to both ends of the horizontal reinforcing bar of the inner leaf plate, and the first vertical edge is located on both ends of the width of the inner leaf plate. The first horizontal edge is located on the top surface of the inner leaf plate before flipping, and the top surface of the first horizontal edge is flush with the top surface of the inner leaf plate before flipping.

9. The production method according to claim 8, characterized by, The slurry is a micro-expansion high-strength cement mortar or fine aggregate concrete.

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