One-time installation dry connection concrete shear wall / special-shaped column structure and construction method

Abstract

The application discloses a one-time installation dry connection concrete shear wall / special-shaped column structure, which comprises a prefabricated multi-layer shear wall / special-shaped column, a prefabricated beam and a composite slab, the prefabricated multi-layer shear wall / special-shaped column is prefabricated in sections with several layers, and comprises shear wall / special-shaped column body concrete, common steel bars and a plurality of prestressed tendons; the top end of each section of the prefabricated multi-layer shear wall / special-shaped column is flush with the lower edge of the floor of the layer, and the bottom end of each section is flush with the upper edge of the floor of the lower layer; the prefabricated multi-layer shear wall / special-shaped column is provided with a plurality of longitudinal holes penetrating through the shear wall / special-shaped column body and used for accommodating the prestressed tendons; the common steel bars comprise stirrups and common longitudinal bars which are connected with each other; the common steel bars are arranged only in the shear wall / special-shaped column body, are integrated with the shear wall / special-shaped column body concrete and do not penetrate through the shear wall / special-shaped column section connecting interface; and the prestressed tendons longitudinally penetrate through the whole length of the component and penetrate through the shear wall / special-shaped column section connecting interface. The multi-layer integrated prefabrication has very high hoisting efficiency.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a one-time installation dry-connection concrete shear wall / irregular column structure and construction method. Background Technology

[0002] Reinforced concrete columns are important load-bearing components in concrete structures. Based on shape, they can be divided into rectangular columns and irregularly shaped columns. Irregularly shaped columns offer a variety of forms, are the same thickness as the building walls, and can organically combine architectural aesthetics, functional flexibility, and reasonable structural load-bearing performance, making them particularly suitable for use in low-rise and multi-story residential buildings. Reinforced concrete shear walls have a similar shape to irregularly shaped columns, but the difference lies in the fact that the former's length-to-thickness ratio is significantly greater than the latter's.

[0003] Currently, the main practice for precast shear walls both domestically and internationally is to precast the shear wall in single-layer sections, meaning precasting it as a segment within the story height range. The process involves first installing the precast shear wall of the current floor, then installing the precast beams and composite slabs of the current floor, completing the construction of the current floor before proceeding to the next floor. The vertical reinforcement of the precast shear wall is primarily connected using grouting sleeves. Grouting sleeve connections are achieved by pre-embedding pre-made sleeves within the precast concrete components, inserting the reinforcing bars through the sleeves, and injecting grout. This technology is currently the main method for mechanically connecting the vertical reinforcement of precast components in China. Its disadvantages include a large number of rebar alignments, difficulty in controlling grouting quality, a lack of simple, efficient, and reliable grouting quality testing methods, and high costs. Layered hoisting and longitudinal reinforcement sleeve grouting connections result in a long structural construction cycle, and the advantages of prefabricated construction are not fully realized.

[0004] Moreover, the height of the post-cast concrete zone in traditional column connection joints is generally within the beam height range, resulting in a large post-cast zone and a large amount of formwork and wet work.

[0005] On the other hand, there is very little research on precast concrete irregular column structures in the industry, and no installation methods have been proposed yet. Summary of the Invention

[0006] To address the problem of low efficiency in layered construction of existing concrete structures, this invention provides a simple, one-time-installed dry-connected concrete shear wall / irregular column structure with significant construction convenience.

[0007] The technical solution to achieve the purpose of this invention is: a one-time installation dry-connected concrete shear wall / irregular column structure, comprising multiple assembled concrete shear wall / irregular column structures, each segment of the concrete shear wall / irregular column structure comprising precast multi-layer shear wall / irregular column, precast beam and composite slab.

[0008] The precast multi-layer shear wall / irregular column is precast in sections of several layers, including shear wall / irregular column body concrete, ordinary steel bars and several prestressed tendons;

[0009] The top of each segment of the precast multi-story shear wall / irregular column is flush with the lower edge of the floor slab of this floor, and the bottom of each segment is flush with the upper edge of the floor slab of the next floor. The post-cast concrete area of ​​the connection node of the precast multi-story shear wall / irregular column is only concentrated within the thickness of the slab.

[0010] Precast multi-story shear walls / irregular columns are provided with several longitudinally penetrating holes through the shear wall / irregular column body to accommodate prestressing tendons.

[0011] Ordinary reinforcing bars include interconnected stirrups and ordinary longitudinal bars. These ordinary reinforcing bars are only installed in shear walls / irregularly shaped columns, and are integrally cast with the concrete of the shear wall / irregularly shaped column, without penetrating the connection interface between the shear wall / irregularly shaped column segments.

[0012] The prestressed tendons run longitudinally through the entire length of the member and pass through the interface between the shear wall / irregular column segment.

[0013] Preferably, the precast multi-layer shear wall / irregular column has grooves at each floor position, and raised shear keys or rough surfaces at the lower end of each floor position. The side intersecting with the precast beam is provided with notches and short steel bars. The precast multi-layer shear wall / irregular column is connected to the concrete of the adjacent shear wall / irregular column by pre-embedded steel to form a whole.

[0014] Preferably, the dry-connected concrete shear wall / irregular column has an L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped structure.

[0015] Preferably, each end of the one-time installation dry-connected concrete shear wall / irregular column structure is provided with at least one hole, and the hole is matched with the prestressing tendon.

[0016] Preferably, the prestressing tendon is coaxial with the hole.

[0017] Preferably, a temporary fixing nut is provided at the upper end of the prestressing tendon.

[0018] Preferably, the bottom longitudinal reinforcement of the precast beam extends from the end face. After the precast beam is installed in place, the bottom longitudinal reinforcement and short steel bars are connected by connectors. The top longitudinal reinforcement of the precast beam consists of fixed steel bars located in the middle of the beam and movable steel bars located at both ends of the beam. After the precast beam is installed in place, the movable steel bars are moved horizontally to the beam shear wall / irregular column joint area.

[0019] Preferably, pre-embedded sleeves are installed at the intermediate floor positions of the precast multi-layer shear wall / irregular column to achieve non-bonding between the prestressed tendons and the cast-in-place concrete.

[0020] As a preferred option, after the precast multi-story shear wall / irregular column is hoisted into place in one go, the precast beams and precast base plates of the composite slabs are installed in order from the lower floor to the upper floor, and the floor slab concrete is poured. The two ends of the precast beams are supported on the side corbels of the precast multi-story shear wall / irregular column, and the composite slabs are placed on the precast multi-story shear wall / irregular column and the precast beams.

[0021] This application also provides a construction method for one-time installation of dry-connected concrete shear wall / irregular column structure, including the following steps:

[0022] Step 1: Precast multi-story shear walls / irregular columns 1, precast beams 2, and composite slabs 3 as a single unit, and transport them to the construction area.

[0023] Step 2: Install the precast multi-story shear wall / irregular column of this section in one go, and install corbels on the side of the precast multi-story shear wall / irregular column that intersects with the precast beam as temporary support for the precast beam;

[0024] Step 3: Following the order from lower to higher floors, first install the precast beams and precast base plates of the composite slabs for this floor.

[0025] Step 4: When installing the precast beam, use connectors to connect the bottom longitudinal reinforcement and short steel bars of the beam, and move the movable steel bars of the precast beam to the beam shear wall / irregular column joint area; place the composite slab surface reinforcement.

[0026] Step 5: Install the formwork; pour the concrete for the floor slab surface layer and connecting areas.

[0027] Step 6: Repeat the installation and pouring of precast beams and composite slabs for intermediate floors within the height range of this section of precast multi-story shear wall / irregular column;

[0028] Step 7: Tension and lock the prestressing tendons at the top of the precast multi-layer shear wall / irregular column in this section in one go;

[0029] Step 8: Hoist the upper section of the precast multi-layer shear wall / irregular column, place it on top of the lower section of the precast multi-layer shear wall / irregular column, and fix it in place;

[0030] Step 9: Install the precast base plate of the precast beams and composite slabs within the height range of the upper section of the precast multi-story shear wall / irregular column, in order from the lower to the upper level.

[0031] Step 10: Complete the construction of the entire building in a loop.

[0032] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The precast multi-story shear wall / irregular column of this application is precast in multi-story sections, and the dry-connected concrete shear wall / irregular column is installed in one go. By adopting this method, the number of component hoisting times is greatly reduced, and there is no need for steel sleeve connection on site. The post-cast concrete area of ​​the connection node of the precast multi-story shear wall / irregular column is only concentrated within the slab thickness range, while the height of the post-cast concrete area of ​​the traditional connection node is generally within the beam height range, and the thickness (i.e., height) of the beam is greater than the thickness of the cast-in-place slab. This solves the problems of multiple hoisting times, large number of steel reinforcement connections, high connection cost, and a lot of wet work on site for existing precast assembled shear walls / irregular columns, and greatly improves construction efficiency.

[0033] (2) The present invention has an ingenious structure. The ordinary steel bars of the component do not pass through the connection interface, and only a small number of prestressed tendons pass through. On site, the prefabricated component only needs to be hoisted into place, the prestressed tendons are connected and then tensioned. The number of steel bar connections is small, and the number of sleeves is greatly reduced. It solves the problems of large number of steel bar connections, difficulty in controlling connection quality, and high connection cost of existing prefabricated assembled columns.

[0034] (3) Under earthquake action, the dry-connected concrete shear wall / irregular column swings and opens along the bottom concave-convex joint, which can effectively reduce the impact of earthquake, play the role of energy dissipation and vibration reduction, with minimal structural damage, and can be quickly restored to use after the earthquake by gravity and prestressed tendons.

[0035] (4) The one-time installation dry connection concrete shear wall / irregular column structure proposed in this invention has a simple structure, convenient installation, and good seismic performance, and has obvious engineering advantages. The concrete of the shear wall / irregular column body is a finished product produced in the factory on demand, and does not need to be poured on-site during the construction process. It solves the technical problems of high cost and poor fire resistance and corrosion resistance caused by the use of steel irregular columns in the existing technology.

[0036] (5) In this application, each layer of the one-time installation dry connection concrete shear wall / irregular column structure is aligned and connected by pre-embedded steel and a small amount of prestressed tendons, which reduces the number of on-site screws, steel sleeves, etc., and does not require alignment of screw holes one by one during installation, thus further improving efficiency.

[0037] (6) The precast beams of this structure are easy to install, which solves the problem of steel bar collision in the node area. Attached Figure Description

[0038] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0039] Figure 1 This is a schematic diagram of the one-time installation of dry-connected concrete shear wall / irregular column structure according to the present invention;

[0040] Figure 2 This is a structural schematic diagram of the prefabricated multi-layer (two layers constitute a segment) shear wall / irregular column of the present invention;

[0041] Figure 3 This is a structural schematic diagram of the prefabricated multi-layer (three layers per segment) shear wall / irregular column of the present invention;

[0042] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0043] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B;

[0044] Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the structure at point C;

[0045] Figure 7 Cross-sectional view of a prefabricated multi-layer irregular-shaped column (L-shaped);

[0046] Figure 8 For prefabricated multi-story shear wall (L-shaped cross-section);

[0047] Figure 9 Cross-sectional view of a prefabricated multi-layer irregular-shaped column (T-shape);

[0048] Figure 10 Cross-sectional view of a prefabricated multi-story shear wall (T-shaped);

[0049] Figure 11 Cross-sectional view of a prefabricated multi-layer irregular column (cross-shaped);

[0050] Figure 12 For prefabricated multi-story shear wall (cross-shaped cross section);

[0051] Figure 13 Cross-sectional view of a prefabricated multi-layer irregular column (Z-shaped);

[0052] Figure 14 Cross-sectional view of a precast multi-story shear wall (Z-shaped);

[0053] Figure 15 Cross-sectional view of a prefabricated multi-layer irregular column (I-shaped);

[0054] Figure 16 For prefabricated multi-story shear wall (I-shaped cross-section);

[0055] Figure 17 This is a 3D view of the precast beam (the moving reinforcement 203 has not yet been moved to the beam-shear wall / irregular column joint area);

[0056] Figure 18 for Figure 17 Enlarged view of point D;

[0057] Figure 19 for Figure 1 3D view of node area at point E (movable rebar 203 has been moved to the beam-shear wall / irregular column node area).

[0058] Figure 20 This is a comparison diagram of the casting area in the prior art and the casting area in this application. Detailed Implementation

[0059] Example 1

[0060] See Figures 1 to 20 This embodiment of the one-time installation dry-connected concrete shear wall / irregular column structure includes multiple assembled concrete shear wall / irregular column structures. Each concrete shear wall / irregular column structure includes a precast multi-layer shear wall / irregular column 1, a precast beam 2, and a composite slab 3.

[0061] The precast multi-layer shear wall / irregular column 1 is precast in sections of several layers, each section including two or more layers of precast shear wall / irregular column, each precast shear wall / irregular column including shear wall / irregular column body concrete 101, ordinary steel bars 102 and several prestressed tendons 103;

[0062] The top of each segment of the precast multi-story shear wall / irregular column is flush with the lower edge of the floor slab of the current floor, and the bottom of each segment is flush with the upper edge of the floor slab of the floor below. The post-cast concrete zone at the connection joint of the precast multi-story shear wall / irregular column is concentrated only within the slab thickness. In the existing technology, precast beams have longitudinal reinforcement, and the precast beams are inserted before casting, so the cast-in-place zone (as shown in the attached diagram) is not included. Figure 20 As shown at point x, the pouring area extends from the bottom of the beam to the top of the floor slab. This pouring area is relatively high, resulting in a larger amount of formwork and wet work. In this application, the top of the dry-connected concrete irregular column is flush with the lower edge of the current floor slab, and the bottom is flush with the upper edge of the floor slab below. Therefore, the pouring area of ​​this application (as shown in the attached diagram) is relatively large. Figure 20 As shown at point B, this will reduce the amount of templates used, saving template usage and improving efficiency.

[0063] The precast multi-story shear wall / irregular column 1 is provided with several longitudinally penetrating holes 110 for accommodating prestressing tendons.

[0064] Ordinary reinforcing bars 102 include interconnected stirrups and ordinary longitudinal bars. These ordinary reinforcing bars 102 are only installed in shear walls / irregularly shaped columns, and are cast integrally with the concrete 101 of the shear wall / irregularly shaped column, without penetrating the connection interface between the shear wall / irregularly shaped column segment and the column.

[0065] The prestressed tendons run longitudinally through the entire length of the component and pass through the connection interface of the shear wall / irregular column segment. This invention proposes a one-time installation dry-connection concrete shear wall / irregular column structure and construction method. This structure employs a novel vertical component—a precast multi-layer shear wall / irregular column. The precast multi-layer shear wall / irregular column is a multi-layer integrated precast structure, resulting in extremely high hoisting efficiency. The precast multi-layer shear wall / irregular column can be connected as a whole through pre-embedded steel sections and a small number of prestressed tendons. On-site, it only needs to be hoisted into place once, followed by the installation of precast beams and composite slabs, and finally, tensioning at the top in one go. By adopting this method, the number of component hoisting operations is greatly reduced, and on-site rebar sleeve connections are unnecessary. This solves the problems of numerous hoisting operations, large number of rebar connections, and high connection costs associated with existing precast assembled shear walls / irregular columns. Furthermore, the precast multi-layer shear wall / irregular column is highly flexible, offering a variety of cross-sectional forms, and can avoid protruding from the wall surface, solving the problem of rectangular columns protruding from the wall surface and affecting aesthetics. Simultaneously, the precast beams of this structure are easy to install, resolving the problem of rebar collision in the joint area. The dry-connected concrete shear wall / irregular column structure proposed in this invention is simple to construct, quick to build and cost-effective, and has good engineering advantages and economic benefits.

[0066] The precast multi-layer shear wall / irregular column 1 has grooves at each floor position, and raised shear keys 108 or rough surfaces at the lower end of each floor position. The side intersecting with the precast beam 2 is provided with notches 111 and short steel bars 105. The precast multi-layer shear wall / irregular column 1 is connected to the concrete 101 of the adjacent shear wall / irregular column body by pre-embedded steel 109 to form a whole.

[0067] The dry-connected concrete shear wall / irregular column has an L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped structure.

[0068] Each end of the one-time installation dry-connected concrete shear wall / irregular column structure is provided with at least one hole, and the hole is matched with the prestressing tendon.

[0069] The prestressed tendon 103 is coaxially arranged with the hole 110.

[0070] A temporary fixing nut 107 is provided at the upper end of the prestressing tendon 103.

[0071] The bottom longitudinal reinforcement 201 of the precast beam 2 extends from the end face. After the precast beam 2 is installed in place, the bottom longitudinal reinforcement 201 and the short steel bar 105 are connected by the connector 204. The beam surface longitudinal reinforcement of the precast beam 2 consists of the fixed steel bar 202 located in the middle of the beam and the movable steel bar 203 located at both ends of the beam. After the precast beam 2 is installed in place, the movable steel bar 203 is moved horizontally to the beam shear wall / irregular column node area.

[0072] Pre-embedded sleeves 106 are installed at the intermediate floor positions of the precast multi-layer shear wall / irregular column to achieve non-bonding between the prestressed tendons 103 and the cast-in-place concrete.

[0073] After the precast multi-story shear wall / irregular column 1 is hoisted into place in one go, the precast beams and precast base plates of the composite slabs are installed and the floor slab concrete is poured in order from the lower floor to the upper floor. The two ends of the precast beam 2 are supported on the side corbels 113 of the precast multi-story shear wall / irregular column 1, and the composite slab 3 is placed on the precast multi-story shear wall / irregular column 1 and the precast beam 2.

[0074] The construction method for one-time installation of dry-connected concrete shear wall / irregular column structures includes the following steps:

[0075] Step 1: Precast multi-story shear walls / irregular columns 1, precast beams 2, and composite slabs 3 as a single unit, and transport them to the construction area.

[0076] Step 2: Install the precast multi-layer shear wall / irregular column 1 in this section in one go, and install corbel 113 on the side of the precast multi-layer shear wall / irregular column 1 that intersects with the precast beam 2 as temporary support for the precast beam 2;

[0077] Step 3: Following the order from lower to higher floors, first install the precast base plate of the precast beam 2 and composite slab 3 on this floor.

[0078] Step 4: When installing the precast beam, use connector 204 to connect the bottom longitudinal reinforcement 201 of the beam to the short reinforcement 105, move the movable reinforcement 203 of the precast beam 2 to the beam shear wall / irregular column joint area; place the composite slab surface reinforcement.

[0079] Step 5: Install the formwork; pour the concrete for the floor slab surface layer and connecting areas.

[0080] Step 6: Repeat the installation and pouring of precast beams and composite slabs for intermediate floors within the height range of this section of precast multi-story shear wall / irregular column;

[0081] Step 7: Tensile the prestressed tendons 103 at the top of the precast multi-layer shear wall / irregular column 1 in this section and lock them in one go;

[0082] Step 8: Hoist the upper precast multi-layer shear wall / irregular column 1 and place it on the top surface of the lower precast multi-layer shear wall / irregular column 1, and fix it in place;

[0083] Step 9: Install the precast base plate of the precast beam 2 and composite slab 3 within the height range of the upper precast multi-layer shear wall / irregular column in the order from low to high.

[0084] Step 10: Complete the construction of the entire building in a loop.

[0085] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A one-time installation dry-connection concrete shear wall / irregular column structure, characterized in that: It includes a multi-segment assembled concrete shear wall / irregular column structure, each segment of which includes a precast multi-layer shear wall / irregular column (1), a precast beam (2) and a composite slab (3). The precast multi-layer shear wall / irregular column (1) is precast in sections of several layers, including shear wall / irregular column concrete (101), ordinary steel bars (102) and several prestressed tendons (103). The top of each segment of the precast multi-story shear wall / irregular column is flush with the lower edge of the floor slab of this floor, and the bottom of each segment is flush with the upper edge of the floor slab of the next floor. The post-cast concrete area of ​​the connection node of the precast multi-story shear wall / irregular column is only concentrated within the thickness of the slab. Precast multi-story shear wall / irregular column (1) is provided with several longitudinal through holes (110) for accommodating prestressed tendons. The ordinary reinforcing bars (102) include interconnected stirrups and ordinary longitudinal bars. The ordinary reinforcing bars (102) are only provided in the shear wall / irregular column body and are cast integrally with the concrete (101) of the shear wall / irregular column body, without penetrating the connection interface of the shear wall / irregular column segment. The prestressed tendons run longitudinally through the entire length of the member and pass through the interface between the shear wall / irregular column segment.

2. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: The precast multi-layer shear wall / irregular column (1) has grooves or rough surfaces at each floor position, and protruding shear keys (108) or rough surfaces at the lower end of each floor position. The side intersecting with the precast beam (2) is provided with notches (111) and short steel bars (105). The precast multi-layer shear wall / irregular column (1) is connected to the adjacent layer shear wall / irregular column body concrete (101) by pre-embedded steel (109) to form a whole.

3. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: The dry-connected concrete shear wall / irregular column is L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped.

4. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: Each end of the one-time installation dry-connected concrete shear wall / irregular column structure is provided with at least one hole, and the hole is matched with the prestressing tendon.

5. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: The prestressed tendon (103) is coaxially arranged with the hole (110).

6. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: A temporary fixing nut (107) is provided at the upper end of the prestressing tendon (103).

7. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 1, characterized in that: The bottom longitudinal reinforcement (201) of the precast beam (2) extends from the end face. After the precast beam (2) is installed in place, the bottom longitudinal reinforcement (201) and the short steel bar (105) are connected by the connector (204). The beam surface longitudinal reinforcement of the precast beam (2) consists of the fixed steel bar (202) located in the middle of the beam and the movable steel bar (203) located at both ends of the beam. After the precast beam (2) is installed in place, the movable steel bar (203) is moved horizontally to the beam shear wall / irregular column node area.

8. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 7, characterized in that: Pre-embedded sleeves (106) are installed at the intermediate floor positions of the precast multi-layer shear wall / irregular column to achieve non-bonding between the prestressed tendons (103) and the cast-in-place concrete.

9. The one-time installation dry-connection concrete shear wall / irregular column structure according to claim 7, characterized in that: After the precast multi-story shear wall / irregular column (1) is hoisted into place in one go, the precast beams and precast base plates of the composite slabs are installed and the floor slab concrete is poured in the order from low to high. The two ends of the precast beam (2) are supported on the side corbels (113) of the precast multi-story shear wall / irregular column (1), and the composite slab (3) is placed on the precast multi-story shear wall / irregular column (1) and the precast beam (2).

10. A construction method for one-time installation of dry-connected concrete shear wall / irregular column structure as described in any one of claims 7-9, characterized in that: Includes the following steps: Step 1: Precast multi-story shear walls / irregular columns (1), precast beams (2), and precast base plates of composite slabs (3) as a single section, and transport them to the construction area; Step 2: Install the precast multi-layer shear wall / irregular column (1) of this section in one go, and install corbels (113) on the side of the precast multi-layer shear wall / irregular column (1) that intersects with the precast beam (2) as temporary support for the precast beam (2); Step 3: Install the precast base plate of the precast beam (2) and composite slab (3) of this floor in the order from low floor to high floor. Step 4: When installing the precast beam, use connector (204) to connect the bottom longitudinal reinforcement (201) of the beam to the short reinforcement (105), move the movable reinforcement (203) of the precast beam (2) to the beam shear wall / irregular column node area; place the composite slab surface reinforcement. Step 5: Install the formwork; pour the concrete for the floor slab surface layer and connecting areas. Step 6: Repeat the installation and pouring of precast beams and composite slabs for intermediate floors within the height range of this section of precast multi-story shear wall / irregular column; Step 7: Tensile prestressing tendons (103) are stretched and locked at the top of the precast multi-story shear wall / irregular column (1) in this section; Step 8: Hoist the upper precast multi-layer shear wall / irregular column (1) and place it on the top surface of the lower precast multi-layer shear wall / irregular column (1), and fix it. Step 9: Install the precast base plate of the precast beam (2) and composite slab (3) within the height range of the upper precast multi-layer shear wall / irregular column in the order from low to high. Step 10: Repeat the process to complete the construction of the entire building.

Images