Modular building shear wall concentrated bar connecting structure and construction method thereof

Abstract

Modular building shear wall concentrated reinforcing bar connecting structure and construction method thereof, including shear wall unit, large-diameter reinforcing bar, grouting material or cast-in-situ concrete layer, mortar layer; the shear wall unit includes shear wall section and edge component on both sides, the edge component includes precast concrete layer and steel pipe buried therein, the steel pipe penetrates the precast concrete layer up and down; the pipe wall of the steel pipe is provided with anchoring structure for preventing the steel pipe from sliding up and down; the reduced diameter section is located at the upper section of the steel pipe; the lower section of the large-diameter reinforcing bar is inserted into the upper section of the lower steel pipe, the upper section of the large-diameter reinforcing bar is inserted into the lower section of the upper steel pipe, and is fixed through the grouting material or cast-in-situ concrete layer in the steel pipe; the mortar layer is arranged between the upper and lower shear wall units. On the basis of adopting concentrated reinforcing bar connection, the interface stress is enhanced, not only the anchoring structure is adopted, but also the steel pipe reduced diameter structure is adopted, finally the convenience of shear wall unit construction and the reliability of connection are ensured, and the modular prefabricated building technical field belongs to.

Description

Technical Field

[0001] This invention relates to the field of modular prefabricated building technology, specifically to a modular building shear wall centralized reinforcement connection structure and its construction method. Background Technology

[0002] Both traditional prefabricated shear walls and modular prefabricated shear walls adhere to the core principles of industrialized construction, improving construction efficiency and quality through standardized and factory-based production. Their design is based on fundamental mechanical principles and relevant design codes. However, compared to traditional prefabricated shear walls, the design of modular prefabricated shear walls requires integration with the entire modular unit. It considers not only wall-to-wall connections but also the connection methods at corners with other structural components, employing a 3D connection method distinct from the 2D splicing of traditional prefabricated shear walls. Furthermore, modular prefabricated shear walls are highly integrated final products encompassing structure, finish, and piping; therefore, the ease of on-site connection during construction must be considered, without causing significant damage to the wall surface.

[0003] There is limited research on connection nodes between existing concrete modular shear walls. Current connection methods mainly reference the design of prefabricated shear walls, including grouting sleeve connections, grout anchor connections, and bolt connections. However, in practical applications, these methods still suffer from problems such as difficulty in aligning reinforcing bars, incomplete grouting, and inconvenient operation, affecting the connection effectiveness.

[0004] Besides these, existing methods for enhancing the synergistic stress at the steel-concrete interface mainly include physical roughening, mechanical anchoring, and chemical modification. Physical roughening primarily involves processes such as sandblasting and texturing, relying solely on friction and chemical bonding, resulting in low synergistic strength. Mechanical anchoring mainly involves internal spiral reinforcement, leading to higher overall costs and greater construction difficulty. Chemical modification enhances chemical bonding through surface coatings such as epoxy resin and modified polymer coatings, but it's difficult to ensure uniform coating application, and the bonding strength of organic polymer coatings gradually decreases due to the long-term alkaline environment of concrete.

[0005] Therefore, it is necessary to design a simple and easy-to-implement modular building shear wall centralized reinforcement connection structure and consider the synergistic stress effect between its connection nodes and concrete. Summary of the Invention

[0006] To address the technical problems existing in the prior art, the purpose of this invention is to provide a modular building shear wall centralized reinforcement connection structure and its construction method. Based on the centralized reinforcement connection, the interface cooperative stress is enhanced by not only adopting an anchoring structure but also a steel pipe diameter reduction structure, ultimately ensuring the convenience of shear wall unit construction and the reliability of connection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The modular building shear wall centralized reinforcement connection structure includes upper and lower spliced ​​shear wall units, large-diameter steel bars, grouting material or cast-in-place concrete layers, and mortar layers. Each shear wall unit comprises a central shear wall segment and two connecting edge members. The edge members include a precast concrete layer and steel pipes embedded in the precast concrete layer, with the steel pipes penetrating the precast concrete layer vertically. The steel pipe walls are equipped with anchoring structures to prevent slippage. The steel pipes consist of a small-diameter segment, a reduced-diameter segment, and a large-diameter segment arranged sequentially from top to bottom, with the reduced-diameter segment located at the top. The lower segment of the large-diameter steel bar is inserted into the upper segment of the steel pipe in the lower shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. The upper segment of the large-diameter steel bar is inserted into the lower segment of the steel pipe in the upper shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. A mortar layer is placed between the upper and lower shear wall units.

[0009] As a preferred option, the steel pipe is a round steel pipe, which is formed into a reduced diameter section and a small diameter section through a diameter reduction process.

[0010] As a preferred option, the anchoring structure consists of evenly distributed concave points on the wall of the steel pipe, which are formed by a press and protrude into the interior space of the steel pipe; or the anchoring structure consists of a steel bar ring welded to the lower end of the inner wall of the steel pipe or a steel bar ring welded to the outer end, based on the concave point structure.

[0011] As a preferred option, the anchoring structure consists of steel nails evenly distributed on the wall of the steel pipe, with the steel nails penetrating through holes drilled in the pipe wall and welded to the pipe wall for fixation; or the anchoring structure consists of a steel ring welded to the lower end of the inner wall of the steel pipe or a steel ring welded to the outer end of the steel pipe, based on the steel nail structure.

[0012] As a preferred option, large-diameter steel bars of equal area are used to replace the longitudinal connecting steel bars of the shear wall for connection.

[0013] As a preferred embodiment, the concave points are arranged in multiple rings along the axial direction of the steel pipe, with the concave points arranged at equal intervals above and below, and each ring of concave points includes multiple circumferentially distributed concave points; the number of reinforcing bar rings is multiple, with the multiple reinforcing bar rings arranged at equal intervals above and below the axial direction of the steel pipe.

[0014] As a preferred embodiment, the reinforcing bar studs are arranged in multiple rings along the axial direction of the steel pipe, with the multiple rings of reinforcing bar studs arranged at equal intervals vertically, and each ring of reinforcing bar studs includes multiple circumferentially distributed reinforcing bar studs; the number of inner reinforcing bar rings is multiple, with the multiple reinforcing bar rings arranged at equal intervals vertically along the axial direction of the steel pipe; the diameter of the outer end reinforcing bar ring is greater than the wall thickness of the steel pipe.

[0015] The construction method for modular building shear wall concentrated reinforcement connection structure includes the following steps:

[0016] S1. The steel pipe is manufactured and its surface is treated in the factory. The ends of the steel pipe are reduced in diameter and anchored.

[0017] S2. Place the processed steel pipes into the pre-tied shear wall reinforcement cage, complete the construction of the shear wall unit in the factory, and transport the shear wall unit as a modular component to the construction site for modular building construction.

[0018] S3. After hoisting the lower shear wall unit at the construction site, pour grout or cast-in-place concrete into the steel pipe and then insert a large-diameter steel bar into the lower steel pipe so that the lower section of the large-diameter steel bar is anchored in the steel pipe and the upper section extends out of the steel pipe.

[0019] S4. Construct a mortar layer at the upper end of the lower shear wall unit;

[0020] S5. Hoist the upper shear wall unit so that the upper section of the protruding steel bar from the lower layer is inserted into the upper steel pipe. Then pour concrete into the upper steel pipe to connect the upper and lower shear wall units into a whole.

[0021] As a preferred option, in step S1, the construction steps of the anchoring structure include: selecting, based on the budget, construction period, and bearing capacity, either processing the concave points on the steel pipe wall or drilling holes in the steel pipe wall and then welding reinforcing bar nails.

[0022] As a preferred option, in step S1, the construction steps of the anchoring structure also include: welding three reinforcing steel rings at 15mm intervals at the lower end of the inner wall of the steel pipe or welding reinforcing steel rings at the outer end.

[0023] The present invention has the following advantages:

[0024] 1. The reduced diameter design of the upper section of the steel pipe used in this invention reduces steel consumption and meets economic requirements. This design facilitates rapid positioning and installation of large-diameter reinforcing bars on site. Furthermore, the reduced diameter design alters the synergistic stress-bearing performance between concrete and the steel pipe, creating resistance to concrete slippage and changing the internal stress distribution. The reduced diameter design is a novel interface synergistic stress-enhancing scheme, distinct from existing methods such as physical roughening, mechanical anchoring, and chemical modification. In addition, the reduced diameter design effectively avoids conflicts between longitudinal reinforcement bars extending into the wall and prevents increased wall thickness due to reinforcement avoidance.

[0025] 2. This invention employs the processing of concave points on the steel pipe wall or the drilling and welding of reinforcing bar nails into the pipe wall, which can enhance the pull-out resistance of large-diameter reinforcing bars inside the steel pipe. If it is desired to further enhance the synergistic stress-bearing effect, it can be further combined with the design of welding reinforcing bar rings (inner or outer side) at the ends. After relatively simple processing, the synergistic stress-bearing strength of the precast concrete-steel pipe and the steel pipe-cast-in-place concrete inside the pipe can be significantly improved, enhancing the pull-out resistance of large-diameter reinforcing bars, thereby improving the overall seismic performance of the modular building shear wall unit.

[0026] 3. Concave processing, unlike existing methods such as physical roughening, mechanical anchoring, and chemical modification to enhance interfacial stress resistance, requires no additional components or welding. It is formed simply by applying pressure directly to the steel pipe wall using a press, resulting in a simple and low-cost process. A single processing step can enhance the synergistic stress resistance between the inner and outer surfaces of the steel pipe and the concrete.

[0027] 4. Welding steel reinforcement rings locally strengthens the rigidity of the steel pipes at the ends, enhancing the synergistic load-bearing performance while reserving most of the space for on-site drilling of large-diameter steel bars. In addition, it effectively reduces the displacement of the end concrete due to slippage.

[0028] 5. The present invention incorporates steel pipes in the edge component area of ​​the modular building shear wall unit, reserving space for on-site concrete pouring, and will not damage the wall surface during on-site installation and construction, thus ensuring the integration of the modular building shear wall. At the same time, the steel pipes can enhance the wall stiffness and improve the overall load-bearing capacity and lateral force resistance of the components.

[0029] 6. The present invention adopts a centralized reinforcement connection method at the edge components of the shear wall unit, replacing the connection of dense reinforcement at the edge with a large-diameter reinforcement connection, avoiding the complexity of on-site construction connection of modular building shear wall units, simplifying the construction and installation process, making it easy to operate, and ensuring that the load-bearing capacity is not reduced.

[0030] 7. Adopt a modular construction approach to shorten the construction period and reduce construction difficulty. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 1.

[0032] Figure 2 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 2.

[0033] Figure 3 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 3.

[0034] Figure 4 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 4.

[0035] Figure 5 These are schematic diagrams of the steel pipes in Examples 1 and 3.

[0036] Figure 6 These are schematic diagrams of the steel pipes in Examples 2 and 4.

[0037] Figure 7This is a schematic diagram of the placement of the shear wall unit below during the construction steps of Example 5.

[0038] Figure 8 This is a schematic diagram of the installation of large-diameter steel bars in the construction steps of Example 5.

[0039] Figure 9 This is a schematic diagram of the cast-in-place concrete and construction mortar layer in Example 5.

[0040] Figure 10 This is a schematic diagram of the construction steps in Example 5, showing the hoisting of the upper shear wall unit and the cast-in-place concrete.

[0041] Figure 11 This is a schematic diagram of the forces acting on the narrowed section.

[0042] Figure 12 This is a comparison chart of the bearing capacity of various anchoring structures.

[0043] Figure 13 This is a comparison diagram of beam-wall joint connections.

[0044] Figure 14 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 6.

[0045] Figure 15 This is a schematic diagram of the modular building shear wall centralized reinforcement connection structure in Example 7.

[0046] Figure 16 These are schematic diagrams of the steel pipe structure in Examples Six and Seven.

[0047] In the diagram, 1-shear wall unit, 2-large diameter steel bar, 3-grouting material or cast-in-place concrete layer, 4-mortar layer.

[0048] 11-Shear wall segment, 12-Edge member, 13-Precast concrete layer, 14-Steel pipe, 15-Reduced diameter section, 16-Concave point, 17-Rebar nail, 18-Rebar ring, 19-Beam bent reinforcement, 20-Steel pipe without reduction in diameter, 21-Reduced diameter steel pipe, 22-Beam without bending reinforcement. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to specific embodiments.

[0050] This invention utilizes a modular structure for the shear wall. Shear wall units and large-diameter reinforcing bars are prefabricated as modular components in the factory. After being transported to the construction site, they are assembled, grouted, or have concrete poured and mortar layers laid on-site, facilitating construction. During the prefabrication of the shear wall units, anchoring structures and diameter reduction treatments are applied to the steel pipes to enhance interfacial forces and ensure reliable connections.

[0051] Example 1

[0052] The modular building shear wall centralized reinforcement connection structure includes upper and lower spliced ​​shear wall units, large-diameter steel bars, grouting material or cast-in-place concrete layers, and mortar layers. Each shear wall unit comprises a central shear wall segment and two connecting edge members. The edge members include a precast concrete layer and steel pipes embedded in the precast concrete layer, with the steel pipes penetrating the precast concrete layer vertically. The steel pipe walls are equipped with anchoring structures to prevent slippage. The steel pipes consist of a small-diameter segment, a reduced-diameter segment, and a large-diameter segment arranged sequentially from top to bottom, with the reduced-diameter segment located at the top. The lower segment of the large-diameter steel bar is inserted into the upper segment of the steel pipe in the lower shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. The choice between grouting material or cast-in-place concrete is selected based on the steel pipe diameter. The upper segment of the large-diameter steel bar is inserted into the lower segment of the steel pipe in the upper shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. A mortar layer is placed between the upper and lower shear wall units.

[0053] The steel pipe is a round steel pipe, which is reduced in diameter to form a reduced diameter section and a small diameter section.

[0054] The anchoring structure consists of evenly distributed recesses on the wall of the steel pipe. These recesses are formed by a press acting on the pipe wall and protrude into the interior space of the steel pipe.

[0055] The longitudinal connecting bars of the shear wall are replaced with large-diameter steel bars of equal area. The anchorage length of the large-diameter steel bars is designed based on force transmission calculations and can also be adjusted according to the construction requirements during installation. This facilitates the insertion of the steel bars during module installation, reducing the error tolerance of the installation.

[0056] The concave dots are arranged in multiple rings along the axial direction of the steel pipe. The concave dots in the multiple rings are arranged at equal intervals, and each ring of concave dots includes multiple circumferentially distributed concave dots.

[0057] Example 2

[0058] In this embodiment, the anchoring structure consists of steel bar nails evenly distributed on the wall of the steel pipe. The steel bar nails are inserted into through holes drilled in the pipe wall and welded to the pipe wall for fixation.

[0059] The steel reinforcement nails are arranged in multiple rings along the axial direction of the steel pipe. The rings of steel reinforcement nails are arranged at equal intervals, and each ring of steel reinforcement nails includes multiple circumferentially distributed steel reinforcement nails.

[0060] Rebar nails have high stiffness, resulting in a more significant interface reinforcement effect.

[0061] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0062] Example 3

[0063] In this embodiment, the anchoring structure is based on the concave point structure, with a steel reinforcement ring welded to the lower end of the inner wall of the steel pipe.

[0064] There are multiple reinforcing rings, which are arranged at equal intervals along the axial direction of the steel pipe.

[0065] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0066] Example 4

[0067] In this embodiment, the anchoring structure is based on a steel nail structure, with a steel ring welded to the lower end of the inner wall of the steel pipe.

[0068] There are multiple reinforcing rings, which are arranged at equal intervals along the axial direction of the steel pipe.

[0069] The parts not mentioned in this embodiment are the same as in Embodiment 2.

[0070] Example 5

[0071] The construction method of the modular building shear wall concentrated reinforcement connection structure in Example 3 includes the following steps:

[0072] S1. The steel pipe is manufactured and its surface is treated in the factory. The ends of the steel pipe are reduced in diameter and anchored.

[0073] S2. Place the processed steel pipes into the pre-tied shear wall reinforcement cage, complete the construction of the shear wall unit in the factory, and transport the shear wall unit as a modular component to the construction site for modular building construction.

[0074] S3, such as Figure 7 As shown, after the lower shear wall unit is hoisted at the construction site, as Figure 8 As shown, after pouring grout or cast-in-place concrete into the steel pipe, a large-diameter reinforcing bar is inserted into the lower part of the steel pipe, such as... Figure 9 As shown, the lower section of the large-diameter steel bar is anchored inside the steel pipe, while the upper section extends out of the steel pipe opening; the amount of grout or concrete to be poured should be determined by calculation to ensure that the concrete does not overflow after the large-diameter steel bar is inserted.

[0075] S4, such as Figure 9 As shown, a mortar layer is constructed at the upper end of the lower shear wall unit;

[0076] S5, such as Figure 10 As shown, the upper shear wall unit is hoisted, allowing the upper section of the protruding reinforcing bars from the lower layer to be inserted into the upper steel pipe. Concrete is then poured into the upper steel pipe to connect the upper and lower shear wall units into a single unit. Because the lower section of the steel pipe is not reduced in diameter, the difficulty of inserting the upper section of the large-diameter reinforcing bars into the upper steel pipe is significantly reduced.

[0077] In step S1, the construction steps of the anchoring structure include: selecting steel pipe wall drilling and welding of reinforcing bar nails according to budget, construction period and bearing capacity.

[0078] In step S1, the construction steps of the anchoring structure also include: welding three steel bar rings at 15mm intervals at the lower end of the inner wall of the steel pipe.

[0079] Example 6

[0080] In this embodiment, the anchoring structure is based on the concave point structure, with a reinforcing ring welded to the outer end of the steel pipe, and the diameter of the reinforcing ring at the outer end is greater than the wall thickness of the steel pipe.

[0081] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0082] Example 7

[0083] In this embodiment, the anchoring structure is based on a steel nail structure, with a steel ring welded to the outer end of the steel pipe. The diameter of the outer end steel ring is larger than the wall thickness of the steel pipe. Parts not mentioned in this embodiment are the same as in Embodiment 2.

[0084] Figure 11 It can be seen that the reduced diameter steel pipe can change the internal force distribution between the concrete and the steel pipe, provide more significant pull-out resistance, and improve the cooperative stress-bearing capacity of the two materials. The reduced diameter steel pipe can provide vertical stress between the steel pipe and the concrete, inhibiting the slippage of the two materials, as shown in (a), while the steel pipe without the reduced diameter design can only provide frictional force, and its inhibition effect is greatly reduced, as shown in (b).

[0085] Figure 12 As shown, pull-out tests were conducted on the steel pipes treated as described above. From bottom to top, the five curves represent: untreated steel pipe, treated with indentations, increased number of indentations, treated with reinforcing bars, and treated with both reinforcing bars and reinforcing rings.

[0086] Figure 13 As shown, (a) is the prior art using non-reduced diameter steel pipes. To solve the spatial interference problem, only bent steel bars in beams or thickened wall structures can be used. (b) is the present invention using reduced diameter steel pipes, with the reduced diameter section providing space for the arrangement of non-reduced diameter steel bars in beams.

[0087] Experimental verification shows that the pull-out bearing capacity of untreated steel pipes is extremely low. However, the pull-out bearing capacity of steel pipes treated with concave points is significantly improved, and this improvement further increases with the number of concave points. When welded reinforcing bars are used, the increase in pull-out bearing capacity is even more pronounced due to the greater stiffness of the bars. Combined with the design of welded reinforcing bar rings at the ends, the pull-out bearing capacity can reach approximately 350 kN, demonstrating a significant improvement effect.

[0088] This invention, during nuclear power plant construction, divides large and complex plant structures into several modules, which are prefabricated in the factory and then assembled and hoisted on site. The shear wall sections of the shear wall components are non-seismic load-bearing parts (the seismic load-bearing parts are the edge members), therefore, the shear wall sections can be designed with lightweight internal partitions, lightweight concrete, or fly ash foamed cement panels to reduce the self-weight of the components and facilitate on-site construction and hoisting. At the connection between the top of the shear wall and the roof layer, self-adhesive rubber asphalt or thermoplastic polyolefin waterproof membrane can be used as the roof waterproofing layer.

[0089] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A modular building shear wall centralized reinforcement connection structure, characterized in that, The shear wall unit comprises vertically connected shear wall units, large-diameter reinforcing bars, grouting material or cast-in-place concrete layers, and mortar layers. Each shear wall unit includes a central shear wall segment and two connecting edge members on either side. The edge members consist of a precast concrete layer and steel pipes embedded within the precast concrete layer, with the steel pipes penetrating the precast concrete layer vertically. The steel pipes are equipped with anchoring structures to prevent slippage. Each steel pipe includes a small-diameter segment, a reduced-diameter segment, and a large-diameter segment arranged sequentially from top to bottom, with the reduced-diameter segment located at the top. The lower segment of the large-diameter reinforcing bar is inserted into the upper segment of the steel pipe in the lower shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. The upper segment of the large-diameter reinforcing bar is inserted into the lower segment of the steel pipe in the upper shear wall unit and fixed by grouting material or cast-in-place concrete within the steel pipe. A mortar layer is placed between the upper and lower shear wall units.

2. The modular building shear wall concentrated reinforcement connection structure according to claim 1, characterized in that, The steel pipe is a round steel pipe, which is reduced in diameter to form a reduced diameter section and a small diameter section.

3. The modular building shear wall concentrated reinforcement connection structure according to claim 1, characterized in that, The anchoring structure consists of evenly distributed concave points on the wall of the steel pipe, which are formed by a press and protrude into the interior space of the steel pipe; or the anchoring structure consists of a steel bar ring welded to the lower end of the inner wall of the steel pipe or a steel bar ring welded to the outer end, based on the concave point structure.

4. The modular building shear wall concentrated reinforcement connection structure according to claim 1, characterized in that, The anchoring structure consists of steel nails evenly distributed on the wall of the steel pipe, which penetrate through holes drilled in the pipe wall and are welded to the pipe wall for fixation; or the anchoring structure consists of a steel ring welded to the lower inner wall of the steel pipe or a steel ring welded to the outer end of the steel pipe, based on the steel nail structure.

5. The modular building shear wall concentrated reinforcement connection structure according to claim 1, characterized in that, The longitudinal connecting bars of the shear wall are replaced with large-diameter steel bars of equal area.

6. The modular building shear wall concentrated reinforcement connection structure according to claim 3, characterized in that, The concave dots are arranged in multiple rings along the axial direction of the steel pipe, with the concave dots arranged at equal intervals above and below. Each ring of concave dots includes multiple circumferentially distributed concave dots. There are multiple reinforcing bar rings, which are arranged at equal intervals above and below the axial direction of the steel pipe.

7. The modular building shear wall concentrated reinforcement connection structure according to claim 4, characterized in that, The steel reinforcement nails are arranged in multiple rings along the axial direction of the steel pipe, with the rings of steel reinforcement nails arranged at equal intervals. Each ring of steel reinforcement nails includes multiple circumferentially distributed steel reinforcement nails. There are multiple inner steel reinforcement rings, which are arranged at equal intervals along the axial direction of the steel pipe. The diameter of the outer end steel reinforcement ring is greater than the wall thickness of the steel pipe.

8. A construction method for a modular building shear wall concentrated reinforcement connection structure according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The steel pipe is manufactured and its surface is treated in the factory. The ends of the steel pipe are reduced in diameter and anchored. S2. Place the processed steel pipes into the pre-tied shear wall reinforcement cage, complete the construction of the shear wall unit in the factory, and transport the shear wall unit as a modular component to the construction site for modular building construction. S3. After hoisting the lower shear wall unit at the construction site, pour grout or cast-in-place concrete into the steel pipe and then insert a large-diameter steel bar into the lower steel pipe so that the lower section of the large-diameter steel bar is anchored in the steel pipe and the upper section extends out of the steel pipe. S4. Construct a mortar layer at the upper end of the lower shear wall unit; S5. Hoist the upper shear wall unit so that the upper section of the protruding steel bar from the lower layer is inserted into the upper steel pipe. Then pour concrete into the upper steel pipe to connect the upper and lower shear wall units into a whole.

9. The construction method of the modular building shear wall concentrated reinforcement connection structure according to claim 8, characterized in that: In step S1, the construction steps of the anchoring structure include: selecting, based on the budget, construction period and bearing capacity, the process of machining the concave points on the steel pipe wall or drilling holes in the steel pipe wall and then welding the reinforcing bar nails.

10. The construction method of the modular building shear wall concentrated reinforcement connection structure according to claim 9, characterized in that: In step S1, the construction steps of the anchoring structure also include: welding three steel rings at 15mm intervals at the lower end of the inner wall of the steel pipe or welding steel rings at the outer end.

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