A prefabricated assembly type corrugated steel pipe spiral stirrup cage confined concrete core column reinforced composite shear wall and an assembly method thereof

Abstract

The application relates to the technical field of precast concrete structures, and particularly discloses a precast assembled corrugated steel pipe spiral stirrup cage confined concrete core column reinforced composite shear wall and an assembling method thereof. The composite shear wall comprises a precast concrete wall and a corrugated steel pipe spiral stirrup cage confined high-strength concrete core column. The precast concrete wall is divided into an upper precast concrete wall and a lower precast concrete wall. A horizontal post-cast connecting layer is arranged between the upper precast concrete wall and the lower precast concrete wall. The corrugated steel pipe spiral stirrup cage confined high-strength concrete core column penetrates the upper precast concrete wall, the horizontal post-cast connecting layer and the lower precast concrete wall from top to bottom in sequence. A steel mesh formed by interweaving vertical distribution steel bars, horizontal distribution steel bars and tie steel bars is embedded in the precast concrete wall. When the upper precast concrete wall and the lower precast concrete wall are assembled, horizontal inserted steel bars are used to connect and anchor the vertical distribution steel bars in the upper precast concrete wall and the lower precast concrete wall.

Description

Technical Field

[0001] The present invention relates to the technical field of precast concrete structures, and in particular to a prefabricated assembled corrugated steel tube spiral hoop cage-constrained concrete core column reinforced composite shear wall and an assembly method thereof. Background Art

[0002] Precast concrete (PC) shear walls are crucial components for achieving assembly in high-rise buildings. Their vertical reinforcement connection methods (such as sleeve grouting, constrained grout-anchor lap joints, ring reinforcement snap-on anchoring, and sleeve extrusion joints) can meet the reliability requirements of PC shear wall assembly connections. However, the seismic damage evolution and failure mechanisms of precast high-rise concrete structures are highly complex. PC shear walls require not only safe and reliable assembly connections but also high levels of redundancy and robustness. Redundancy emphasizes gradient capacity and multiple force transmission paths, while robustness emphasizes the controllable stability of expected performance. Existing PC shear walls and prefabricated steel tube concrete core column reinforced composite shear walls mostly focus on the mechanical properties of "equivalent to cast-in-place", and rarely involve the redundancy of the destruction process. The assembly connection technology based on vertical steel bar connection is still insufficient in achieving multi-dimensional performance enhancement of prefabricated high-rise concrete structures. Therefore, traditional PC shear walls do not have obvious redundancy characteristics during seismic damage. Actual earthquake damage surveys and experimental studies have shown that, especially under the combined stress state of axial tension-compression-bending / compression-shear, the seismic performance of traditional PC shear walls is difficult to be fully guaranteed, and the connection performance of the horizontal post-cast connection layer deteriorates rapidly.

[0003] The mechanical properties of existing PC shear walls are overly dependent on the structural measures and construction quality of vertical steel bar connections, resulting in long construction periods and high costs. The embedded steel pipes of prefabricated and assembled steel tube concrete core column reinforced composite shear walls are welded or semi-welded on site, or connected by threaded sleeve grouting, or by compound steel casing connections. This results in a large workload on site, high positioning accuracy requirements for the embedded steel pipes, low assembly fault tolerance, and great difficulty in controlling the assembly quality of PC shear walls.

[0004] The present invention addresses the key technical issues existing in PC shear walls and proposes a new type of prefabricated and assembled corrugated steel tube spiral hoop cage-constrained concrete core column reinforced composite shear wall to meet the multi-dimensional seismic performance requirements of PC shear walls. Compared with traditional PC shear walls and existing prefabricated steel tube concrete core column reinforced composite shear walls, the new shear wall has the characteristics of "easy assembly, strong connection, high redundancy, and reduced cost". The "partial assembly, partial cast-in-place" nested system breaks through the conventional force transmission mechanism and can form a multi-mechanism collaborative working system of load-bearing-energy consumption-gradient conversion, which is suitable for the application of high-rise and super-high-rise prefabricated and assembled building structures in high-intensity areas. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects and shortcomings of the prior art and to provide a prefabricated assembled corrugated steel tube spiral hoop cage confined concrete core column reinforced composite shear wall and an assembly method thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A prefabricated assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall, comprising a prefabricated concrete wall and a corrugated steel tube spiral stirrup cage-confined high-strength concrete core column;

[0008] The precast concrete wall is divided into an upper precast concrete wall and a lower precast concrete wall. A horizontal post-cast connection layer is set between the upper and lower precast concrete walls. A high-strength concrete core column with a corrugated steel tube spiral stirrup cage and composite restraint runs through the upper precast concrete wall, the horizontal post-cast connection layer, and the lower precast concrete wall from top to bottom. A steel mesh composed of vertical distribution steel bars, horizontal distribution steel bars, and tie steel bars is embedded in the precast concrete wall. A steel mesh composed of dense horizontal distribution steel bars and tie steel bars is embedded in the horizontal post-cast connection layer.

[0009] The high-strength concrete core column with a corrugated steel tube and spiral stirrup cage compound constraint includes a corrugated steel tube, a spiral stirrup cage, and high-strength concrete. Multiple corrugated steel tubes are pre-buried in a precast concrete wall in rows and at intervals, with the ends of the corrugated steel tubes extending out of the upper and lower end surfaces of the precast concrete wall, respectively. The spiral stirrup cage is inserted into the corrugated steel tube, and high-strength concrete is poured into the corrugated steel tube to form a high-strength concrete core column with a corrugated steel tube and spiral stirrup cage compound constraint.

[0010] When the upper precast concrete wall and the lower precast concrete wall are assembled, the vertical distribution steel bars in the upper precast concrete wall and the lower precast concrete wall are connected and anchored by means of horizontal dowel pins.

[0011] As a preferred embodiment, the two ends of the vertical distribution steel bars extend out of the upper and lower end surfaces of the precast concrete wall respectively, and the vertical distribution steel bars are closed into a rectangular ring after making pairs of annular steel bar perforations; the vertical distribution steel bars located in the upper precast concrete wall, the annular steel bar perforations at the lower part and the annular steel bar perforations at the upper part of the vertical distribution steel bars located in the lower precast concrete wall are staggered and overlapped to form horizontal rows of through holes, and the horizontal dowel bars pass through the horizontal rows of through holes to form a pin-type connection structure between the vertical distribution steel bars of the upper precast concrete wall and the vertical distribution steel bars of the lower precast concrete wall.

[0012] As a preferred embodiment, the diameter of the ring reinforcement holes of the vertical distribution reinforcement is required to be larger than the diameter of the horizontal inserted reinforcement, and the diameter and steel strength of the horizontal inserted reinforcement are required to be larger than the diameter and steel strength of the vertical distribution reinforcement.

[0013] As a preferred embodiment, the corrugated steel pipe is a thin-walled pipe. The corrugated steel pipe of the upper precast concrete wall and the corrugated steel pipe of the lower precast concrete wall are abutted in the horizontal post-cast connection layer. The corrugated steel pipe is used to constrain the high-strength concrete poured in the corrugated steel pipe.

[0014] As a preferred embodiment, the spiral stirrup cage includes spiral stirrups and vertical stand bars, a plurality of vertical stand bars are arranged on the inner side of the spiral stirrups, and the vertical stand bars are fixed to the spiral stirrups by binding to form a spiral stirrup cage; the vertical stand bars are ordinary steel bars or fiber reinforced composite material bars; the spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe at the corresponding position of the lower precast concrete wall, and the spiral stirrup cage vertically penetrates the horizontal post-cast connecting layer, and the spiral stirrup cage of the upper precast concrete wall and the spiral stirrup cage of the lower precast concrete wall are close to each other in the middle part of the height direction of the corrugated steel pipe.

[0015] The assembly method of the prefabricated assembled corrugated steel tube spiral stirrup cage confined concrete core column reinforced composite shear wall during construction includes the following steps:

[0016] S1. Installation of spiral stirrup cage: The spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe of the lower precast concrete wall from the upper end surface of the lower precast concrete wall, wherein half of the spiral stirrup cage of the upper precast concrete wall is inside the corrugated steel pipe of the upper precast concrete wall, and the other half is outside the corrugated steel pipe of the upper precast concrete wall;

[0017] S2. Precast concrete wall installation: Lift the precast concrete wall. The corrugated steel pipe of the lower precast concrete wall is encased in the other half of the spiral stirrup cage outside the corrugated steel pipe of the upper precast concrete wall. The spiral stirrup cage guides the positioning of the upper precast concrete wall. The upper precast concrete wall is lowered until half the length of the spiral stirrup cage is inside the corrugated steel pipe of the lower precast concrete wall. The corrugated steel pipe of the upper precast concrete wall is close to the corrugated steel pipe at the corresponding position of the lower precast concrete wall.

[0018] S3. Connection of vertical distribution reinforcement: The lower ring reinforcement holes of the vertical distribution reinforcement of the upper precast concrete wall and the upper ring reinforcement holes of the vertical distribution reinforcement of the lower precast concrete wall are staggered and overlapped to form a row of horizontal through holes. Horizontal dowel bars are inserted through the rows of horizontal through holes to form a pin-type connection between the vertical distribution reinforcement of the upper and lower precast concrete walls.

[0019] S4. Grouting connection of the horizontal post-cast connection layer: Tie and intensify the horizontal distribution steel bars and tie steel bars to form a steel mesh for the horizontal post-cast connection layer. Install a formwork for pouring the horizontal post-cast connection layer outside the steel mesh. Pour grouting concrete inside the formwork to form the horizontal post-cast connection layer.

[0020] S5. Casting of the high-strength concrete column core with a corrugated steel pipe and spiral stirrup cage: Pour high-strength concrete from the upper opening of the corrugated steel pipe of the upper precast concrete wall to 2 / 5 of the height of the corrugated steel pipe of the upper precast concrete wall, leaving some spiral stirrup cages outside the high-strength concrete;

[0021] The cycle is repeated to complete the assembly and construction of the prefabricated corrugated steel tube spiral stirrup cage-constrained high-strength concrete core column reinforced composite shear walls on each floor.

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

[0023] 1) Easy assembly: The vertical distribution reinforcement of the precast concrete wall is made into a closed rectangular ring with annular reinforcement perforations, and is connected by horizontal dowel pins to achieve the anchoring of the vertical distribution reinforcement in the upper precast concrete wall and the vertical distribution reinforcement in the lower precast concrete wall, eliminating the complex on-site connection process of the vertical distribution reinforcement. The thin-walled corrugated steel pipe only considers the function of restraining the high-strength concrete. The corrugated steel pipe of the upper precast concrete wall and the corresponding corrugated steel pipe of the lower precast concrete wall are close to each other in the horizontal post-cast connection layer, without any connection. The spiral stirrup cage of the upper precast concrete wall and the spiral stirrup cage of the lower precast concrete wall are close to each other in the middle of the height direction of the corrugated steel pipe. The spiral stirrup cage has sufficient anchorage length in the high-strength concrete inside the corrugated steel pipe, and no additional connection or binding is required. The connection process between vertical erection steel bars and corrugated steel pipes is eliminated on site. The spiral stirrup cage has low lateral stiffness, which is convenient for correcting or compensating construction errors. It can also guide the rapid positioning and assembly of precast concrete walls, greatly reducing the difficulty of assembly and improving construction efficiency.

[0024] 2) Strong Connection: The high-strength concrete core column is confined by a corrugated steel tube spiral stirrup cage, which inherently possesses high stiffness and bearing capacity. The horizontal post-cast connection layer, containing a continuous corrugated steel tube spiral stirrup cage, significantly enhances horizontal connection performance and reduces reliance on the precast concrete wall's vertical distributed reinforcement connection structure and construction quality. This effectively addresses the technical challenges of weak horizontal connection integrity and low out-of-plane stability in traditional PC shear walls. It also delays damage to the horizontal post-cast connection layer under combined axial tension-compression-bending / compression-shear loads, ensuring its plastic deformation development and seismic ductility. The horizontal dowel pin-type connection anchors the precast concrete wall's vertical distributed reinforcement, forming a reliable pin structure that transmits vertical tension and lateral bending moments. Even under extreme combined axial tension-compression-bending / compression-shear loads, the vertical distributed reinforcement maintains high tensile and bending resistance.

[0025] 3) High redundancy: The corrugations of the corrugated steel pipe suppress the bond slip between the concrete of the precast concrete wall and the outer wall of the high-strength concrete core column constrained by the corrugated steel pipe spiral stirrup cage, ensuring that the high-strength concrete core column constrained by the corrugated steel pipe spiral stirrup cage works in coordination with the precast concrete wall; the vertical frame steel bars of the spiral stirrup cage are ordinary steel bars, fiber-reinforced composite steel bars or a mixture of the two, giving them high elastic strain capacity, which can partially enhance the self-repair ability of the precast concrete wall and the horizontal post-cast connection layer to damage and cracks; multiple corrugated steel pipe spiral stirrup cages are combined The high-strength concrete core column with corrugated steel tube spiral stirrups is embedded in the precast concrete wall to form a poor capacity. The nested system of different energy dissipation mechanisms can break through the conventional force transmission mechanism and form a multiple seismic defense line with the coordinated work of multiple mechanisms of load-bearing-energy dissipation-gradient conversion. In the damage evolution process at different stress stages, the high-strength concrete core column with corrugated steel tube spiral stirrups gradually shares part of the load internal force of the damage and unloading of the horizontal post-cast connection layer, forming a significant hierarchical performance degradation, changing the overall seismic damage mode and energy dissipation mechanism of the composite shear wall, and obtaining the high redundancy characteristics of gradient defense.

[0026] 4) Cost Reduction: The easy assembly of this composite shear wall improves construction efficiency and reduces construction costs. Its strong connections and high redundancy allow for appropriate relaxation of current specifications for precast concrete shear walls, such as the axial compression ratio and height-to-thickness ratio. This reduces structural deadweight, mitigates seismic response, saves on seismic investment, and increases effective building area. Standardized manufacturing of the components of this composite shear wall offers strong industrial applicability. Compared to existing prefabricated, assembled steel tubular concrete core-reinforced composite shear walls, the steel content of the thin-walled corrugated steel tube and spiral stirrup cage combination is significantly reduced. The composite shear wall's connections are centrally reinforced by the corrugated steel tube and spiral stirrup cage complex confinement of the high-strength concrete core, reducing the vertically distributed reinforcement content of the precast concrete shear wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a prefabricated corrugated steel tube spiral stirrup cage confining a concrete core column reinforced composite shear wall.

[0028] Figure 2 Schematic diagram of the cross section of a composite shear wall reinforced with a prefabricated corrugated steel tube spiral stirrup cage confining a concrete core column.

[0029] Figure 3 Schematic diagram of the cross section of a high-strength concrete core column confined by a corrugated steel tube spiral stirrup cage.

[0030] Figure 4 This is a structural diagram of a spiral stirrup cage inserted into a corrugated steel pipe.

[0031] Figure 5 Schematic diagram of the structure of vertical distribution steel bars.

[0032] Figure 6 This is a structural schematic diagram of the staggered and overlapping vertical distribution steel bars in the upper precast concrete wall and the lower precast concrete wall.

[0033] Among them: 1: precast concrete wall, 2: corrugated steel pipe, 3: spiral stirrup cage, 31: spiral stirrup, 32: vertical frame steel bars, 4: high-strength concrete, 5: vertical distribution steel bars, 51: perforated circular steel bars, 6: horizontal distribution steel bars, 7: tie steel bars, 8: horizontal dowel bars, 9: dense horizontal distribution steel bars. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0035] like Figure 1 and Figure 2 As shown, a prefabricated and assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall includes a prefabricated concrete wall and a corrugated steel tube spiral stirrup cage-confined high-strength concrete core column.

[0036] The precast concrete walls are divided into an upper precast concrete wall and a lower precast concrete wall. A horizontal post-cast connection layer is installed between the upper and lower precast concrete walls. A high-strength concrete core column, confined by a corrugated steel tube spiral stirrup cage, runs through the upper precast concrete wall, the horizontal post-cast connection layer, and the lower precast concrete wall, sequentially from top to bottom. A steel mesh composed of interwoven vertical distribution steel, horizontal distribution steel, and tie bars is embedded within the precast concrete walls. The horizontal post-cast connection layer also contains a steel mesh composed of interwoven dense horizontal distribution steel and tie bars. During the steel mesh manufacturing process, the density and distribution of the steel mesh meet the design requirements to ensure the load-bearing capacity and stiffness requirements of the precast concrete walls and the horizontal post-cast connection layer.

[0037] like Figure 2 、 Figure 3 and Figure 4 As shown, the corrugated steel tube spiral stirrup cage compound constrained high-strength concrete core column includes a corrugated steel tube, a spiral stirrup cage and high-strength concrete; multiple corrugated steel tubes are arranged in a row and pre-buried in a precast concrete wall at intervals, with the two ends of the corrugated steel tube extending out of the upper end surface and the lower end surface of the precast concrete wall respectively, the spiral stirrup cage is inserted into the corrugated steel tube, and high-strength concrete is poured into the corrugated steel tube to form a corrugated steel tube spiral stirrup cage compound constrained high-strength concrete core column.

[0038] The corrugated steel pipe is a thin-walled pipe. The corrugated steel pipe of the upper precast concrete wall and the corrugated steel pipe of the lower precast concrete wall are abutted in the horizontal post-cast connection layer. The corrugated steel pipe is used to constrain the high-strength concrete poured in the corrugated steel pipe.

[0039] The spiral stirrup cage includes spiral stirrups and vertical support bars. Multiple vertical support bars are looped around the inner side of the spiral stirrups and secured to the spiral stirrups by tying, forming a spiral stirrup cage. Each spiral stirrup cage includes at least two vertical support bars with a certain degree of lateral and compressive stiffness. In this embodiment, the vertical support bars are ordinary steel bars or fiber-reinforced composite bars. The two vertical support bars are arranged along the width of the precast concrete wall. The vertical support bars facilitate tying with the spiral stirrups, maintaining the spacing between the spiral stirrups, locating the spiral stirrups, and easily correcting or compensating for deviations during assembly and construction.

[0040] The spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe at the corresponding position in the lower precast concrete wall. The spiral stirrup cage vertically penetrates the horizontal post-cast connecting layer and abuts the spiral stirrup cage of the upper precast concrete wall and the spiral stirrup cage of the lower precast concrete wall at the middle of the height of the corrugated steel pipe. Ensure that the spiral stirrup cage is accurately positioned within the corrugated steel pipe.

[0041] like Figure 1 、 Figure 5 and Figure 6 As shown, when the upper precast concrete wall and the lower precast concrete wall are assembled, the vertical distribution steel bars in the upper precast concrete wall and the lower precast concrete wall are connected and anchored by horizontal dowel pins.

[0042] The two ends of the vertical distribution steel bars extend out of the upper end face and the lower end face of the precast concrete wall respectively. The vertical distribution steel bars are closed into a rectangular ring after making a pair of annular steel bar perforations. The annular steel bar perforations at the lower part of the vertical distribution steel bars located in the upper precast concrete wall are staggered and overlapped with the annular steel bar perforations at the upper part of the vertical distribution steel bars located in the lower precast concrete wall to form a horizontal row of through holes. The rows of through holes are coaxially arranged, and the horizontal dowel bars pass through the horizontal rows of through holes to form a pin-type connection structure between the vertical distribution steel bars of the upper precast concrete wall and the vertical distribution steel bars of the lower precast concrete wall.

[0043] The diameter of the ring reinforcement holes of the vertical distribution reinforcement is required to be larger than the diameter of the horizontal inserted reinforcement. The diameter and steel strength of the horizontal inserted reinforcement are required to be larger than the diameter and steel strength of the vertical distribution reinforcement to ensure the reliability and connection bearing capacity of the horizontal inserted reinforcement connection structure.

[0044] The assembly method of the prefabricated assembled corrugated steel tube spiral stirrup cage confined concrete core column reinforced composite shear wall during construction includes the following steps:

[0045] S1. Installation of Spiral Stirrup Cage: The spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe of the lower precast concrete wall from the upper end face of the lower precast concrete wall. Half of the spiral stirrup cage is inside the corrugated steel pipe, and the other half is outside. When installing the spiral stirrup cage, ensure that it is correctly aligned with the corrugated steel pipe to ensure smooth subsequent construction.

[0046] S2. Precast concrete wall installation: Lift the precast concrete wall, and the corrugated steel pipe of the lower precast concrete wall will cover the other half of the spiral stirrup cage outside the corrugated steel pipe of the upper precast concrete wall. The spiral stirrup cage will guide the positioning of the upper precast concrete wall. The upper precast concrete wall will be lowered until half the length of the spiral stirrup cage is inside the corrugated steel pipe of the lower precast concrete wall; the corrugated steel pipe of the upper precast concrete wall will be close to the corrugated steel pipe at the corresponding position of the lower precast concrete wall.

[0047] S3. Connection of Vertical Distribution Rebar: The lower ring-shaped reinforcement holes of the vertical distribution rebar in the upper precast concrete wall are offset and overlapped with the upper ring-shaped reinforcement holes of the vertical distribution rebar in the lower precast concrete wall to form a row of horizontal through-holes. Horizontal dowel bars are inserted through these rows of horizontal through-holes, forming a pin-type connection between the vertical distribution rebar of the upper and lower precast concrete walls. When connecting the vertical distribution rebar, ensure that the rows of horizontal through-holes are coaxial and that the horizontal dowel bars pass accurately through the rows of through-holes to ensure a secure connection and structural integrity.

[0048] S4. Grouting of the horizontal post-cast connection layer: Tie and intensify the horizontal distribution and tie bars to form a reinforcement mesh for the horizontal post-cast connection layer. Install a formwork for the horizontal post-cast connection layer outside the reinforcement mesh. Pour grouting concrete within the formwork to form the horizontal post-cast connection layer. During tying, ensure that the density of the horizontal distribution and tie bars meets the design requirements to ensure the structural strength and durability of the connection layer.

[0049] S5. Casting of the high-strength concrete column core with a corrugated steel tube and spiral stirrup cage: Pour high-strength concrete through the upper opening of the corrugated steel tube in the upper precast concrete wall. Pour the high-strength concrete to 2 / 5 of the height of the corrugated steel tube in the upper precast concrete wall, leaving some spiral stirrups outside the high-strength concrete. Ensure a continuous and even pouring process during the high-strength concrete pouring to ensure the density and uniformity of the core column.

[0050] The cycle is repeated to complete the assembly and construction of the prefabricated corrugated steel tube spiral stirrup cage-constrained high-strength concrete core column reinforced composite shear walls on each floor.

[0051] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A prefabricated assembled corrugated steel tube spiral stirrup cage confined concrete core column reinforced composite shear wall, characterized by: It includes precast concrete walls and corrugated steel tube spiral stirrup cages with compound confined high-strength concrete core columns; The precast concrete wall is divided into an upper precast concrete wall and a lower precast concrete wall. A horizontal post-cast connection layer is set between the upper and lower precast concrete walls. A high-strength concrete core column with a corrugated steel tube spiral stirrup cage and composite restraint runs through the upper precast concrete wall, the horizontal post-cast connection layer, and the lower precast concrete wall from top to bottom. A steel mesh composed of vertical distribution steel bars, horizontal distribution steel bars, and tie steel bars is embedded in the precast concrete wall. A steel mesh composed of dense horizontal distribution steel bars and tie steel bars is embedded in the horizontal post-cast connection layer. The high-strength concrete core column with a corrugated steel tube and spiral stirrup cage compound constraint includes a corrugated steel tube, a spiral stirrup cage, and high-strength concrete. Multiple corrugated steel tubes are pre-buried in a precast concrete wall in rows and at intervals, with the ends of the corrugated steel tubes extending out of the upper and lower end surfaces of the precast concrete wall, respectively. The spiral stirrup cage is inserted into the corrugated steel tube, and high-strength concrete is poured into the corrugated steel tube to form a high-strength concrete core column with a corrugated steel tube and spiral stirrup cage compound constraint. When the upper precast concrete wall and the lower precast concrete wall are assembled, the vertical distribution steel bars in the upper precast concrete wall and the lower precast concrete wall are connected and anchored by means of horizontal dowel pins; The two ends of the vertical distribution steel bars extend out of the upper and lower end surfaces of the precast concrete wall respectively. The vertical distribution steel bars are closed into a rectangular ring after making pairs of annular steel bar perforations. The vertical distribution steel bars located in the upper precast concrete wall have annular steel bar perforations at the lower part and are staggered and overlapped with the annular steel bar perforations at the upper part of the vertical distribution steel bars located in the lower precast concrete wall to form horizontal rows of through holes. The horizontal dowel bars penetrate the horizontal rows of through holes to form a pin-type connection structure between the vertical distribution steel bars of the upper precast concrete wall and the vertical distribution steel bars of the lower precast concrete wall.

2. The prefabricated assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall according to claim 1, characterized in that: The diameter of the ring reinforcement holes of the vertical distribution reinforcement is required to be larger than the diameter of the horizontal inserted reinforcement, and the diameter and steel strength of the horizontal inserted reinforcement are required to be larger than the diameter and steel strength of the vertical distribution reinforcement.

3. The prefabricated assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall according to claim 2, characterized in that: The corrugated steel pipe is a thin-walled pipe. The corrugated steel pipe of the upper precast concrete wall and the corrugated steel pipe of the lower precast concrete wall are abutted in the horizontal post-cast connection layer. The corrugated steel pipe is used to constrain the high-strength concrete poured in the corrugated steel pipe.

4. The prefabricated assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall according to claim 3, characterized in that: The spiral stirrup cage includes spiral stirrups and vertical stand bars. Multiple vertical stand bars are arranged on the inner side of the spiral stirrups. The vertical stand bars are fixed to the spiral stirrups by binding to form a spiral stirrup cage. The vertical stand bars are ordinary steel bars or fiber reinforced composite material bars. The spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe at the corresponding position of the lower precast concrete wall, and the spiral stirrup cage vertically penetrates the horizontal post-cast connecting layer. The spiral stirrup cage of the upper precast concrete wall and the spiral stirrup cage of the lower precast concrete wall are close to each other in the middle part of the height direction of the corrugated steel pipe.

5. The method for assembling a prefabricated assembled corrugated steel tube spiral stirrup cage-confined concrete core column reinforced composite shear wall during construction according to any one of claims 1 to 4, characterized in that The steps include: S1. Installation of spiral stirrup cage: The spiral stirrup cage of the upper precast concrete wall is inserted into the corrugated steel pipe of the lower precast concrete wall from the upper end surface of the lower precast concrete wall, wherein half of the spiral stirrup cage of the upper precast concrete wall is inside the corrugated steel pipe of the upper precast concrete wall, and the other half is outside the corrugated steel pipe of the upper precast concrete wall; S2. Precast concrete wall installation: Lift the precast concrete wall. The corrugated steel pipe of the lower precast concrete wall is encased in the other half of the spiral stirrup cage outside the corrugated steel pipe of the upper precast concrete wall. The spiral stirrup cage guides the positioning of the upper precast concrete wall. The upper precast concrete wall is lowered until half the length of the spiral stirrup cage is inside the corrugated steel pipe of the lower precast concrete wall. The corrugated steel pipe of the upper precast concrete wall is close to the corrugated steel pipe at the corresponding position of the lower precast concrete wall. S3. Connection of vertical distribution reinforcement: The lower ring reinforcement holes of the vertical distribution reinforcement of the upper precast concrete wall and the upper ring reinforcement holes of the vertical distribution reinforcement of the lower precast concrete wall are staggered and overlapped to form a row of horizontal through holes. Horizontal dowel bars are inserted through the rows of horizontal through holes to form a pin-type connection between the vertical distribution reinforcement of the upper and lower precast concrete walls. S4. Grouting connection of the horizontal post-cast connection layer: Tie and intensify the horizontal distribution steel bars and tie steel bars to form a steel mesh for the horizontal post-cast connection layer. Install a formwork for pouring the horizontal post-cast connection layer outside the steel mesh. Pour grouting concrete inside the formwork to form the horizontal post-cast connection layer. S5. Casting of the high-strength concrete column core with a corrugated steel pipe and spiral stirrup cage: Pour high-strength concrete from the upper opening of the corrugated steel pipe of the upper precast concrete wall to 2 / 5 of the height of the corrugated steel pipe of the upper precast concrete wall, leaving some spiral stirrup cages outside the high-strength concrete; The cycle is repeated to complete the assembly and construction of the prefabricated corrugated steel tube spiral stirrup cage-constrained high-strength concrete core column reinforced composite shear walls on each floor.

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