Prefabricated double steel plate concrete composite shear wall dry connection node and construction method

Abstract

The present invention discloses a prefabricated double steel plate concrete composite shear wall dry connection node and a construction method, comprising a shear wall-shear wall-composite floor slab node, wherein the shear wall-shear wall-composite floor slab node comprises a shear wall and a composite floor slab, wherein an H-shaped connection steel frame and a restraining tension screw are provided at the connection between the shear wall and the composite floor slab, wherein the restraining tension screw is inserted through the H-shaped connection steel frame; the present invention not only has mechanical properties equivalent to cast-in-place, but also can further improve the construction efficiency and quality reliability of vertical and horizontal connections of prefabricated concrete shear walls, thereby reducing the overall construction cost.

Description

Technical Field

[0001] The invention relates to the technical field of building node construction, and in particular to a prefabricated double steel plate concrete composite shear wall dry connection node and a construction method. Background Art

[0002] Prefabricated concrete buildings generally have a higher construction cost than cast-in-place buildings. In addition to the high cost of prefabricated components, factors such as temporary support and support at the construction site, aluminum formwork costs, grouting and sealing, and a large amount of wet work are important factors that increase the construction cost of prefabricated concrete buildings. On the other hand, the node connection technology of prefabricated shear wall structures mainly focuses on wet connections such as post-pouring and grout anchors, and the reinforcement layout is complex and difficult to operate. Construction problems such as collision of steel bars in prefabricated components, cracking of components, low installation and positioning efficiency, and difficulty in controlling the quality of sleeve grouting connections have become the focus of attention on the construction efficiency and quality safety of prefabricated concrete buildings, affecting the effectiveness of the promotion of prefabricated buildings. Summary of the invention

[0003] The main purpose of the present invention is to provide a prefabricated double steel plate concrete composite shear wall dry connection node and a construction method, aiming to solve the existing technical problems.

[0004] To achieve the above object, the present invention provides a prefabricated double steel plate concrete composite shear wall dry connection node, including a shear wall-shear wall-composite floor slab node.

[0005] The shear wall-shear wall-composite floor node includes a shear wall and a composite floor. An H-shaped connecting steel frame and a constraining tension screw are provided at the connection between the shear wall and the composite floor. The constraining tension screw is inserted through the H-shaped connecting steel frame.

[0006] Furthermore, the H-shaped connecting steel frame includes H-shaped steel, a cantilever connecting steel plate connected to the H-shaped steel, tension bolts equidistantly inserted on the cantilever connecting steel plate, support rib screws equidistantly inserted through the H-shaped steel, and reinforcing ribs that connect the H-shaped steel and the cantilever connecting steel plate and are evenly distributed.

[0007] Furthermore, the shear wall-shear wall-composite floor node also includes a water-stop steel sheet for blocking the water seepage path, and the water-stop steel sheet is arranged around the shear wall.

[0008] Furthermore, it also includes a shear wall-filling wall vertical joint node, which includes a shear wall and a filler wall. The shear wall and the filler wall are connected by tongue-and-groove / key-slot connections and pin bolts, and steel bars are inserted through the connection ends, wherein a flexible caulking material is provided at the caulking position.

[0009] Furthermore, it also includes a precast shear wall-cast-in-place shear wall vertical joint node, the precast shear wall-cast-in-place shear wall vertical joint node includes a T-shaped node, the T-shaped node is split into two I-shaped shear walls, corresponding to the precast shear wall and the cast-in-place shear wall respectively, the precast shear wall and the cast-in-place shear wall are connected by connecting steel plates and tension bolts.

[0010] Furthermore, the prefabricated shear wall-cast-in-place shear wall vertical joint node includes a T-shaped node and an edge component, the T-shaped node includes a prefabricated shear wall and a cast-in-place shear wall, the T-shaped node is prefabricated together with the prefabricated edge components on both sides to form a whole, and the cast-in-place shear wall is connected to the prefabricated T-shaped area through a steel plate and a constraint rod.

[0011] Furthermore, it also includes a shear wall-cast-in-place beam node, which includes a shear wall, a cast-in-place beam and a prefabricated edge member. The connection node between the prefabricated edge member and the cast-in-place beam is covered with a steel plate with side openings. The longitudinal reinforcement in the cast-in-place beam extends into the prefabricated edge member and is cast into an integral structure with the beam connection node.

[0012] The construction method of the prefabricated double steel plate concrete composite shear wall dry connection node comprises the following steps:

[0013] S1. The next layer is completed and the construction layer is ready for operation;

[0014] S2. Hoist and install shear walls and infill walls: Install the shear wall connecting steel frame at the construction layer and place cast-in-place beam reinforcement: Remove the bolts connecting the steel frame and hoist the shear wall to the holes connecting the steel frame. After leveling and alignment, connect the shear wall and the connecting steel frame with high-strength bolts to achieve rapid construction and installation of prefabricated shear walls; hoist the infill wall after the shear wall is installed, and connect the vertical joints between the infill wall and the shear wall with keyways, and use flexible caulking materials to caulk the joints. The bottom of the infill wall is connected with mortar, and a water-stop steel sheet can be further set to improve the waterproof performance;

[0015] S3. Install the construction layer shear wall connection steel frame and place the cast-in-place beam reinforcement: After the shear wall is installed, install the construction layer connection steel frame above the construction layer shear wall to connect the next layer of shear wall; at the same time, the beam reinforcement cage and beam side formwork can be placed;

[0016] S4. Support the composite slab, lay the surface reinforcement and the new shear wall support reinforcement: connect the prefabricated floor slab to the connecting steel plate of the steel frame through bolts. The composite slab can be a composite slab without reinforcement on all four sides; at the same time, connect the new shear wall support reinforcement to the shear wall through threading and bolts to achieve a reliable force transmission path for the floor slab;

[0017] S5. Casting the cast-in-place layer and beam of the slab: After the installation of the composite slab is completed, the cast-in-place layer and beam components of the composite slab can be cast.

[0018] The beneficial effects of the present invention are embodied in:

[0019] The present invention is in line with the future development direction of prefabricated buildings, and solves the problems of extensive construction methods, low labor productivity and shortage of construction workers; the shear wall edge components and webs are fully prefabricated, and the enclosure structure is formed in one step, reducing the amount of wet work in the cast-in-place area; the grouting sleeve is replaced by a bolt dry connection with the post-casting section, further reducing wet work on the construction site and improving construction efficiency; the new connection node does not require temporary support of prefabricated wall panels; the new shear wall-floor node can use composite slabs without reinforcement on all four sides, thereby improving the production efficiency of the composite slabs; the new filling wall panels can widely use existing lightweight, green, low-carbon and environmentally friendly materials, further reducing the self-weight of prefabricated exterior walls, and are low-carbon and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the shear wall-shear wall-composite plate connection node (shear wall web) of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the shear wall-shear wall-composite plate connection node (shear wall edge member) of the present invention;

[0022] Figure 3 This is a schematic diagram of the H-shaped connection steel frame structure of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of the H-shaped connection steel frame structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the shear wall-filling wall vertical joint dry connection node structure of the present invention;

[0025] Figure 6 This is a structural schematic diagram of a first embodiment of a prefabricated shear wall-cast-in-situ shear wall vertical joint dry connection node of the present invention;

[0026] Figure 7 This is a structural schematic diagram of a second embodiment of a prefabricated shear wall-cast-in-situ shear wall vertical joint dry connection node of the present invention;

[0027] Figure 8 This is a schematic diagram of the shear wall-cast-in-situ beam connection node structure of the present invention;

[0028] Fig. 9 This is a schematic diagram of step S1 in the construction method of the present invention;

[0029] Fig.10 This is a schematic diagram of step S2 in the construction method of the present invention;

[0030] Fig.11 This is a schematic diagram of step S3 in the construction method of the present invention;

[0031] Fig.12 This is a schematic diagram of step S4 in the construction method of the present invention;

[0032] Fig.13 It is a schematic diagram of step S5 in the construction method of the present invention.

[0033] Description of reference numerals:

[0034] A1, shear wall; A2, composite floor slab; A3, precast shear wall; A4, cast-in-place shear wall; B1, infill wall; C1, cast-in-place beam;

[0035] 100. H-shaped connecting steel frame; 101. H-shaped steel; 102. Cantilever connecting steel plate; 103. Tension bolts; 104. Support reinforcement screws; 105. Strengthening ribs; 200. Constrained tension screws; 300. Waterstop steel sheet; 400. Flexible caulking material; 500. Steel bars; 600. Prefabricated edge components; 700. Steel plates; 800. Longitudinal reinforcement. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0039] See also Figure 1 and 2 The prefabricated double steel plate concrete composite shear wall dry connection node of the present invention comprises a shear wall-shear wall-composite floor slab node.

[0040] The shear wall-shear wall-composite floor node includes a shear wall A1 and a composite floor A2. The connection between the shear wall A1 and the composite floor A2 is provided with an H-shaped connection steel frame 100 and a restraining tension screw 200. The restraining tension screw 200 is inserted through the H-shaped connection steel frame 100. It can ensure that the horizontal joint node meets the design requirements of a strong node and a weak component.

[0041] High-strength bolts, connecting steel plates, and integrated screws of floor support bars anchored to the wall panels achieve reliable mechanical properties equivalent to cast-in-place nodes. The composite slab adopts a composite slab without reinforcement, but there is still a reliable force transmission path between the composite slab and the shear wall. The force transmission path is: composite slab-high-strength bolts-cantilevered steel plate and stiffening ribs-shear wall H-type connection steel frame-shear wall; it not only has the same mechanical properties as cast-in-place, but can also further improve the construction efficiency and quality reliability of the vertical and horizontal connections of precast concrete shear walls, and reduce the overall construction cost.

[0042] In one embodiment, see Figure 3 and Figure 4, the H-shaped connecting steel frame 100 includes an H-shaped steel 101, a cantilever connecting steel plate 102 connected to the H-shaped steel 101, tension bolts 103 inserted at equal intervals on the cantilever connecting steel plate 102, support rib screws 104 inserted at equal intervals through the H-shaped steel 101, and reinforcing ribs 105 connected to the H-shaped steel 101 and connected to the cantilever connecting steel plate 102 and evenly distributed. Reliable equivalent cast-in-place node mechanical properties are achieved through high-strength bolts, connecting steel plates, and integrated screws for floor support ribs anchored to the wall panels. The composite slab adopts a composite slab without reinforcement, but there is still a reliable force transmission path between the composite slab and the shear wall, and the force transmission path is: composite slab-high-strength bolts-cantilever steel plate and stiffening ribs-shear wall H-shaped connecting steel frame-shear wall. Therefore, although a composite slab without reinforcement is adopted, there is still a reliable connection between the composite slab and the shear wall. For the cast-in-place layer of the floor slab, firstly, the screw rods of the H-shaped connecting steel frame 100 flush with the cast-in-place layer penetrate into the cast-in-place layer, and the screw rods integrated with the support reinforcement serve as the support reinforcement to ensure reliable anchoring and force transmission path. Therefore, the cast-in-place layer of the slab and the shear wall ensure a reliable force transmission path.

[0043] In one embodiment, see Figure 3 The shear wall-shear wall-composite floor node also includes a water-stop steel sheet 300 for blocking the water seepage path, and the water-stop steel sheet 300 is arranged around the shear wall A1. The water-stop steel sheet is arranged to block the water seepage path and enhance the waterproof performance at the node.

[0044] In one embodiment, see Figure 5 , and also includes a shear wall-filling wall vertical joint node, the shear wall-filling wall vertical joint node includes a shear wall A1 and a filler wall B1, the shear wall A1 and the filler wall B1 are connected by a tongue / key groove connection and a pin, and a steel bar 500 is inserted through the connection end, wherein a flexible caulking material 400 is provided at the caulking position. It is convenient to realize the flexible connection between the edge component and the filler wall. This connection method can achieve the goal of weakening the influence of the precast concrete filler wall on the main structure and enhance the energy dissipation capacity of the structure.

[0045] In one embodiment, see Figure 6 , and also includes the precast shear wall-cast-in-place shear wall vertical joint node. The precast shear wall-cast-in-place shear wall vertical joint node includes a T-shaped node. The T-shaped node is split into two I-shaped shear walls, corresponding to the precast shear wall A3 and the cast-in-place shear wall A4. The precast shear wall A3 and the cast-in-place shear wall A4 are connected by connecting steel plates and tension bolts. The core T-shaped node adopts a separate constraint to form an overall force in the core node area, achieving the same mechanical properties as the cast-in-place edge component node.

[0046] In one embodiment, see Figure 7The vertical joint node of the precast shear wall and cast-in-place shear wall includes a T-shaped node and an edge member. The T-shaped node includes a precast shear wall A3 and a cast-in-place shear wall A4. The T-shaped node is precast together with the precast edge members 600 on both sides to form a whole. The cast-in-place shear wall A4 is connected to the precast T-shaped area through a steel plate and a restraining rod. The core T-shaped node adopts an integral restraint to form an integral force in the core node area, achieving the same mechanical properties as the cast-in-place edge member node.

[0047] In one embodiment, see Figure 8 , and also includes a shear wall-cast-in-situ beam node, which includes a shear wall A1, a cast-in-situ beam C1, and a prefabricated edge member 600. The connection node between the prefabricated edge member 600 and the cast-in-situ beam is covered with a steel plate 700 with a side opening. The longitudinal reinforcement 800 in the cast-in-situ beam C1 extends into the prefabricated edge member 600 and is cast with the beam connection node to form an integral structure. The wall-beam node is subjected to integral force, and a strong node design is achieved.

[0048] The construction method of the prefabricated double steel plate concrete composite shear wall dry connection node includes the following steps, please refer to Figure 9-13 :

[0049] S1. The next layer is completed and the construction layer is ready for operation;

[0050] S2. Hoist and install shear walls and infill walls: Install the shear wall connecting steel frame at the construction layer and place cast-in-place beam reinforcement: Remove the bolts connecting the steel frame and hoist the shear wall to the holes connecting the steel frame. After leveling and alignment, connect the shear wall and the connecting steel frame with high-strength bolts to achieve rapid construction and installation of prefabricated shear walls; hoist the infill wall after the shear wall is installed, and connect the vertical joints between the infill wall and the shear wall with keyways, and use flexible caulking materials to caulk the joints. The bottom of the infill wall is connected with mortar, and a water-stop steel sheet can be further set to improve the waterproof performance;

[0051] S3. Install the construction layer shear wall connection steel frame and place the cast-in-place beam reinforcement: After the shear wall is installed, install the construction layer connection steel frame above the construction layer shear wall to connect the next layer of shear wall; at the same time, the beam reinforcement cage and beam side formwork can be placed;

[0052] S4. Support the composite slab, lay the surface reinforcement and the new shear wall support reinforcement: connect the prefabricated floor slab to the connecting steel plate of the steel frame through bolts. The composite slab can be a composite slab without reinforcement on all four sides; at the same time, connect the new shear wall support reinforcement to the shear wall through threading and bolts to achieve a reliable force transmission path for the floor slab;

[0053] S5. Casting the cast-in-place layer and beam of the slab: After the installation of the composite slab is completed, the cast-in-place layer and beam components of the composite slab can be cast.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The construction method of the prefabricated double steel plate concrete composite shear wall dry connection node is characterized by: The prefabricated double steel plate concrete composite shear wall dry connection node includes a shear wall-shear wall-composite floor slab node. The shear wall-shear wall-composite floor node comprises a shear wall (A1) and a composite floor (A2); an H-shaped connection steel frame (100) and a restraining tension screw (200) are provided at the connection between the shear wall (A1) and the composite floor (A2); the restraining tension screw (200) penetrates and is plugged into the H-shaped connection steel frame (100); The H-shaped connecting steel frame (100) comprises an H-shaped steel (101), a cantilever connecting steel plate (102) connected to the H-shaped steel (101), tension bolts (103) inserted at equal intervals on the cantilever connecting steel plate (102), support rib screws (104) inserted at equal intervals through the H-shaped steel (101), and evenly distributed reinforcing ribs (105) connecting the H-shaped steel (101) and the cantilever connecting steel plate (102); The shear wall-shear wall-composite floor slab node further includes a water-stop steel sheet (300) for blocking a water seepage path, and the water-stop steel sheet (300) is arranged around the shear wall (A1); It also includes a shear wall-filling wall vertical joint node, the shear wall-filling wall vertical joint node includes a shear wall (A1) and a filler wall (B1), the shear wall (A1) and the filler wall (B1) are connected by a tongue-and-groove connection and a pin, and a steel bar (500) is inserted through the connection end, wherein a flexible caulking material (400) is provided at the caulking position; It also includes a prefabricated shear wall-cast-in-place shear wall vertical joint node, wherein the prefabricated shear wall-cast-in-place shear wall vertical joint node includes a T-shaped node, and the T-shaped node is split into two I-shaped shear walls, which correspond to the prefabricated shear wall (A3) and the cast-in-place shear wall (A4), respectively. The prefabricated shear wall (A3) and the cast-in-place shear wall (A4) are connected with tension bolts through a connecting steel plate; The prefabricated shear wall-cast-in-situ shear wall vertical joint node includes a T-shaped node and an edge member, the T-shaped node includes a prefabricated shear wall (A3) and a cast-in-situ shear wall (A4), the T-shaped node is prefabricated together with the prefabricated edge members (600) on both sides to form a whole, and the cast-in-situ shear wall (A4) is connected to the prefabricated T-shaped area through a steel plate and a restraining tie rod; It also includes a shear wall-cast-in-situ beam node, the shear wall-cast-in-situ beam node includes a shear wall (A1), a cast-in-situ beam (C1) and a prefabricated edge member (600), the connection node between the prefabricated edge member (600) and the cast-in-situ beam is covered with a steel plate (700) with a side opening, the longitudinal reinforcement (800) in the cast-in-situ beam (C1) extends into the prefabricated edge member (600) and is cast at the beam connection node to form an integral structure; The construction method comprises the following steps: S1. The next layer is completed and the construction layer is ready for operation; S2. Hoist and install shear walls and infill walls: Install the shear wall connection steel frame at the construction layer and place cast-in-place beam reinforcement: Remove the bolts of the connection steel frame, first hoist the shear wall to the connection steel frame, and after leveling and alignment, connect the shear wall and the connection steel frame with high-strength bolts to achieve rapid construction and installation of prefabricated shear walls; hoist the infill wall after the shear wall is installed, connect the vertical joints of the infill wall and the shear wall by key slots, and use flexible caulking materials to caulk the joints, and connect the bottom of the infill wall with mortar for mortar connection, and further set water-stop steel sheets to improve waterproof performance; S3. Install the construction layer shear wall connection steel frame and place the cast-in-place beam reinforcement: After the shear wall is installed, install the construction layer connection steel frame above the construction layer shear wall to connect the next layer of shear wall; at the same time, the beam reinforcement cage and beam side formwork can be placed; S4. Support the composite slab, lay the surface reinforcement and shear wall support reinforcement: connect the prefabricated floor slab to the connecting steel plate of the steel frame through bolts. The composite slab can be a composite slab without reinforcement on all four sides; at the same time, connect the shear wall support reinforcement to the shear wall through threading and bolts to achieve a reliable force transmission path for the floor slab; S5. Casting the cast-in-place layer and beam of the slab: After the installation of the composite slab is completed, the cast-in-place layer and beam components of the composite slab can be cast.

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