Composite steel connector, rigid connection joint of precast underground wall panel and construction method

Abstract

The present invention discloses a combined steel connector, a rigid connection node for a precast underground wall panel and a construction method, belonging to the technical field of precast assembled structures. It includes a steel bar connecting sleeve, an H-shaped steel, and a shear-resistant sleeve. A first installation hole is opened along the X-axis flange plate direction of the H-shaped steel, and a second installation hole is opened along the Y-axis web direction of the H-shaped steel. The steel bar connecting sleeve is inserted into the first installation hole, and the shear-resistant sleeve is inserted into the second installation hole. The flange of the H-shaped steel is welded to the main reinforcement of the precast underground continuous wall, and the main reinforcement of the precast slab or the composite slab is connected to the steel bar connecting sleeve. This rigid connection node solves the complex connection node problem between the precast underground continuous wall and the precast slab or the composite slab, and realizes the reliable connection between the precast underground continuous wall and the precast slab or the composite slab.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated assembled structures, and particularly relates to a combined steel connector, a rigid connection node for a precast underground wall panel, and a construction method. Background Art

[0002] The beam-slab connection node is a key connection node of the underground subway station structure. In the cast-in-situ underground subway station structure, the steel bar anchoring relationship at the wall panel node is usually that the slab steel bars are anchored into the wall or the slab and wall steel bars are mutually anchored into each other to improve the overall performance and seismic performance of the structure. However, in the prefabricated underground subway station structure, both the wall and the slab are precast components. At the same time, in order to save materials and reduce energy consumption, the precast wall and slab components mostly use hollow components, resulting in difficulty in reserving slab anchoring steel bars in the wall or being unable to reserve the mutually anchored steel bars between the wall and the slab. Contents of the Invention

[0003] The present invention discloses a rigid connection node for a precast underground wall panel and a construction method, which have good mechanical properties and simple process requirements, solve the complex connection node problem between the precast underground continuous wall and the precast slab or composite slab, and realize the reliable connection between the precast underground continuous wall and the precast slab or composite slab.

[0004] To achieve the above object, on the one hand, the present invention adopts a combined steel connector, which includes a steel bar connecting sleeve, an H-shaped steel, and a shear-resistant sleeve. A first installation hole is opened along the X-axis flange plate direction of the H-shaped steel, and a second installation hole is opened along the Y-axis web direction of the H-shaped steel. The steel bar connecting sleeve is inserted into the first installation hole, and the shear-resistant sleeve is inserted into the second installation hole.

[0005] Further, the aperture of the first installation hole is the same as the outer diameter of the steel bar connecting sleeve, and the hole depth is the same as the length of the steel bar connecting sleeve.

[0006] Further, the first installation hole vertically penetrates through the flange plate of the H-shaped steel and horizontally penetrates through the web of the H-shaped steel. The steel bar connecting sleeve is circumferentially fully welded to the flange of the H-shaped steel, and the steel bar connecting sleeve is axially fully welded to the web of the H-shaped steel.

[0007] Further, the aperture of the second installation hole is the same as the outer diameter of the shear-resistant sleeve.

[0008] Further, the second installation hole vertically penetrates through the web of the H-shaped steel, and the shear-resistant sleeve is circumferentially fully welded to the web of the H-shaped steel.

[0009] On the other hand, a rigid connection node for a precast underground wall panel is adopted, which includes: a precast underground continuous wall, a precast slab or composite slab, a wet joint, and the above-mentioned combined steel connector. The precast slab or composite slab is connected to the precast underground continuous wall through the combined steel connector, and the post-cast concrete in the connection area forms a wet joint.

[0010] Furthermore, the combined steel connector is embedded in the precast diaphragm wall, the H-shaped steel flange is welded to the main reinforcement of the precast diaphragm wall, and the shear-resistant sleeve is concentric with the cavity of the precast diaphragm wall.

[0011] Furthermore, the main reinforcement of the precast slab or the composite slab is anchored into the steel bar connecting sleeve.

[0012] Furthermore, the inner diameter of the shear-resistant sleeve is the same as the cavity of the precast diaphragm wall.

[0013] On the other hand, a construction method for a precast diaphragm wall and a precast slab or a composite slab is adopted, which is characterized in that the combined steel connector as described above is used to connect the precast diaphragm wall and the precast slab or the composite slab, including:

[0014] Manufacture the combined steel connector;

[0015] Bind and weld the lower row of main reinforcements of the precast diaphragm wall, install and place the combined steel connector on the lower row of main reinforcements, with the steel bar connecting sleeve of the combined steel connector facing upwards, and weld and fix the lower flange of the H-shaped steel to the lower row of main reinforcements; bind and weld the upper row of main reinforcements of the precast diaphragm wall, weld and fix the upper flange of the H-shaped steel to the upper row of main reinforcements, insert a hollow airbag of the precast diaphragm wall component to form a cavity, the airbag passes through the shear-resistant sleeve, install the side formwork of the precast diaphragm wall, pour concrete and cure it;

[0016] After the precast diaphragm wall is installed and the foundation pit is excavated, during the installation stage of the precast slab or the composite slab, anchor the main reinforcement of the precast slab or the main reinforcement of the composite slab into the steel bar connecting sleeve, and then pour the concrete in the connection area to form a wet joint.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] (1) The combined steel connector of the present invention connects the precast diaphragm wall with the precast slab or the composite slab, greatly simplifies the joint structure, and improves the assembly efficiency.

[0019] (2) The combined steel connector of the present invention can be applied to precast diaphragm walls, precast slabs and composite slabs with any specifications such as thickness and width.

[0020] (3) The bearing capacity, stiffness, stability, necessary ductility and energy dissipation capacity of the combined steel connector of the present invention can meet the connection requirements between the precast diaphragm wall and the precast slab or the composite slab in the precast and assembled underground subway station structure.

[0021] (4) The combined steel connector of the present invention has a simple structure, a simple process, and the assembly accuracy can meet the design and specification requirements of the precast and assembled structure, meeting the requirements of the development of building industrialization. Description of the Drawings

[0022] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0023] Figure 1 It is a three-dimensional structure diagram of a combined steel connector;

[0024] Figure 2 It is an overall elevation view of a rigid connection node of a precast underground wall panel;

[0025] Figure 3 It is an overall elevation view of a rigid connection node of a precast underground wall panel;

[0026] Figure 4 It is a plan layout diagram of the relationship between the combined steel connector and the main reinforcement of a rigid connection node of a precast underground wall panel;

[0027] Figure 5 It is a plan layout diagram of the relationship between the combined steel connector and the main reinforcement of a rigid connection node of a precast underground wall panel.

[0028] In the figure:

[0029] 10 - Precast diaphragm wall, 20 - Composite slab, 30 - Combined steel connector, 40 - Wet joint, 50 - Precast slab, 101 - Main reinforcement of precast diaphragm wall, 102 - Cavity of precast diaphragm wall, 201 - Main reinforcement of composite slab, 501 - Main reinforcement of precast slab, 301 - Reinforcement connecting sleeve, 302 - H-shaped steel, 303 - Shear resistance sleeve. Specific embodiments

[0030] To further illustrate the features of the present invention, please refer to the following detailed description and drawings of the present invention. The attached drawings are for reference and illustration only and are not intended to limit the protection scope of the present invention.

[0031] Please refer to Figure 1 As shown, this embodiment discloses a combined steel connector, including a reinforcement connecting sleeve 301, an H-shaped steel 302, and a shear resistance sleeve 303. A first installation hole is opened along the X-axis flange plate direction of the H-shaped steel 302, and a second installation hole is opened along the Y-axis web direction of the H-shaped steel 302. The reinforcement connecting sleeve 301 is inserted into the first installation hole, and the shear resistance sleeve 303 is inserted into the second installation hole.

[0032] It should be noted that in this embodiment, the H-shaped steel 302 includes a web and two flange plates. The X-axis refers to the strong axis direction of the member, which is the direction of the web of the H-shaped steel 302; the Y-axis refers to the weak axis direction of the member, which is the direction perpendicular to the web of the H-shaped steel. By arranging a plurality of first mounting holes at intervals along the flange plate direction of the X-axis of the H-shaped steel 302 and arranging second mounting holes at equal intervals along the web direction of the Y-axis of the H-shaped steel 302, the steel bar connecting sleeve 301 is inserted into the first mounting hole, and the shear-resistant sleeve 303 is inserted into the second mounting hole. The precast slab 50 or the composite slab 20 is connected to the precast diaphragm wall 10 through a rigid connection node 30 embedded in the precast diaphragm wall. Specifically, the flange of the H-shaped steel 302 is welded to the main reinforcement 101 of the precast diaphragm wall, and the main reinforcement 501 of the precast slab or the main reinforcement 201 of the composite slab is anchored into the steel bar connecting sleeve 301 for connection, and the post-cast concrete is connected to form a wet joint 40.

[0033] The rigid connection node 30 in this embodiment can be set at any position of the precast diaphragm wall according to actual needs, and the precast slab 50 or the composite slab 20 can be connected to any position of the precast diaphragm wall 10 according to actual needs.

[0034] As a further preferred technical solution, the aperture of the first mounting hole is the same as the outer diameter of the steel bar connecting sleeve 301, and the hole depth is the same as the length of the steel bar connecting sleeve 301.

[0035] As a further preferred technical solution, the first mounting hole vertically penetrates the flange plate of the H-shaped steel 302 and horizontally penetrates the web of the H-shaped steel 302. The steel bar connecting sleeve 301 is circumferentially welded to the flange of the H-shaped steel 302, and the steel bar connecting sleeve 301 is axially welded to the web of the H-shaped steel 302.

[0036] As a further preferred technical solution, the aperture of the second mounting hole is the same as the outer diameter of the shear-resistant sleeve 303.

[0037] As a further preferred technical solution, the second mounting hole is located in the Y-axis direction of the H-shaped steel 302. The second mounting hole vertically penetrates the web of the H-shaped steel 302, and the shear-resistant sleeve 303 is circumferentially welded to the web of the H-shaped steel 302.

[0038] As Figures 2 to 5 shown, this embodiment also discloses a rigid connection node for a precast underground wall panel, including: a precast diaphragm wall 10, a precast slab 50 or a composite slab 20, a wet joint 40, and the combined steel connector 30 disclosed in the above embodiment. The precast slab 50 or the composite slab 20 is connected to the precast diaphragm wall 10 through the combined steel connector 30, and the post-cast concrete in the connection area forms a wet joint 40.

[0039] As a further preferred technical solution, the combined steel connector 30 is embedded in the precast diaphragm wall 10. The flange of the H-shaped steel 302 is welded to the main reinforcement 101 of the precast diaphragm wall. The shear-resistant sleeve 303 is concentric with the cavity 102 of the precast diaphragm wall 10, and the inner diameter of the shear-resistant sleeve 303 is the same as that of the cavity 102 of the precast diaphragm wall 10.

[0040] As a further preferred technical solution, the main reinforcement 201 of the precast slab or the main reinforcement 501 of the composite slab is anchored into the steel bar connecting sleeve 301.

[0041] This embodiment also discloses a construction method for a precast diaphragm wall and a precast slab or a composite slab, which is characterized in that the combined steel connector disclosed in the above embodiment is used to connect the precast diaphragm wall and the precast slab or the composite slab, and includes the following steps:

[0042] (1) Process the combined steel connector:

[0043] A steel bar connecting sleeve installation hole is opened in the X-axis direction of the H-shaped steel 302. The installation hole vertically penetrates the flange plate of the H-shaped steel 302 and horizontally penetrates the web of the H-shaped steel 302. The diameter of the installation hole is the same as the outer diameter of the steel bar connecting sleeve 301. The steel bar connecting sleeve 301 is inserted into the installation hole, and the steel bar connecting sleeve 301 is circumferentially and fully welded to the flange of the H-shaped steel 302, and the steel bar connecting sleeve 301 is axially and fully welded to the web of the H-shaped steel 302. A shear-resistant sleeve 303 installation hole is opened in the Y-axis direction of the H-shaped steel 302. The installation hole vertically penetrates the web of the H-shaped steel 302. The diameter of the installation hole is the same as the outer diameter of the shear-resistant sleeve 303, and the shear-resistant sleeve 303 is circumferentially and fully welded to the web of the H-shaped steel 302.

[0044] (2) Install the combined steel connector:

[0045] The main reinforcement 101 of the precast diaphragm wall includes a lower row of main reinforcements and an upper row of main reinforcements. The lower row of main reinforcements 101 of the precast diaphragm wall 10 is bound and welded. The combined steel connector 30 is installed and placed on the lower row of main reinforcements 101. The steel bar connecting sleeve 301 of the combined steel connector 30 faces upward, and the lower flange of the H-shaped steel 301 is welded and fixed to the lower row of main reinforcements 101. The upper row of main reinforcements 101 of the precast diaphragm wall 10 is bound and welded, and the upper flange of the H-shaped steel 302 is welded and fixed to the upper row of main reinforcements 101. A hollow airbag of the precast diaphragm wall member is inserted to form a cavity 102. The airbag penetrates through the shear-resistant sleeve 303. The side form of the precast diaphragm wall 10 is installed, and concrete is poured and cured.

[0046] (3) Install the precast slab or the composite slab:

[0047] After the precast diaphragm wall 10 is installed and the foundation pit is excavated, during the installation stage of the precast slab 50 or the composite slab 20, the main bars 501 of the precast slab or the main bars 201 of the composite slab are anchored into the steel bar connecting sleeve 301, and then the concrete in the connection area is poured to form the wet joint 40.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combined steel connector, characterized in that, It includes a steel bar connecting sleeve (301), an H-shaped steel (302), and a shear-resistant sleeve (303). A first installation hole is opened along the X-axis flange plate direction of the H-shaped steel (302), and a second installation hole is opened along the Y-axis web direction of the H-shaped steel (302). The steel bar connecting sleeve (301) is inserted into the first installation hole, and the shear-resistant sleeve (303) is inserted into the second installation hole. The first installation hole vertically penetrates the flange plate of the H-shaped steel (302) and horizontally penetrates the web of the H-shaped steel (302). The steel bar connecting sleeve (301) is circumferentially and fully welded to the flange of the H-shaped steel (302), and the steel bar connecting sleeve (301) is axially and fully welded to the web of the H-shaped steel (302); The second installation hole vertically penetrates the web of the H-shaped steel (302), and the shear-resistant sleeve (303) is circumferentially and fully welded to the web of the H-shaped steel (302).

2. The combined steel connector according to claim 1, characterized in that The diameter of the first installation hole is the same as the outer diameter of the steel bar connecting sleeve (301), and the hole depth is the same as the length of the steel bar connecting sleeve (301).

3. The combined steel connector according to claim 1, characterized in that, The diameter of the second installation hole is the same as the outer diameter of the shear-resistant sleeve (303).

4. A rigid connection node for precast underground wall panels, characterized in that, It includes: A precast diaphragm wall (10), a precast slab (50) or a composite slab (20), a wet joint (40), and the combined steel connector (30) according to any one of claims 1-3. The precast slab (50) or the composite slab (20) is connected to the precast diaphragm wall (10) through the combined steel connector (30), and the post-cast concrete in the connection area forms a wet joint (40); The combined steel connector (30) is embedded in the precast diaphragm wall (10). The flange of the H-shaped steel (302) is welded to the main reinforcement (101) of the precast diaphragm wall (10), and the shear-resistant sleeve (303) is concentric with the cavity (102) of the precast diaphragm wall (10).

5. The rigid connection node of the precast underground wall panel according to claim 4, characterized in that, The main reinforcement (501) of the precast slab or the main reinforcement (201) of the composite slab is anchored into the steel bar connecting sleeve (301).

6. The rigid connection joint of the precast underground wall panel according to claim 4, characterized in that The inner diameter of the shear-resistant sleeve (303) is the same as the cavity (102) of the precast diaphragm wall (10).

7. A construction method for a precast diaphragm wall and a precast slab or a composite slab, characterized in that, Connecting the precast diaphragm wall with the precast slab or the composite slab by using the combined steel connector according to any one of claims 1-3, including: Processing to obtain the combined steel connector (30); Binding and welding the lower row of main reinforcements (101) of the precast diaphragm wall (10), installing and placing the combined steel connector (30) on the lower row of main reinforcements (101). The steel bar connecting sleeve (301) of the combined steel connector (30) faces upward, and the lower flange of the H-shaped steel (302) is welded and fixed to the lower row of main reinforcements (101); binding and welding the upper row of main reinforcements (101) of the precast diaphragm wall (10), welding and fixing the upper flange of the H-shaped steel (302) to the upper row of main reinforcements (101), inserting a hollow airbag of the precast diaphragm wall component to form a cavity (102), the airbag passes through the shear-resistant sleeve (303) in a penetrating manner, installing the side form of the precast diaphragm wall (10), pouring concrete and curing; After the precast diaphragm wall (10) is installed and the foundation pit is excavated, during the installation stage of the precast slab (50) or the composite slab (20), the main reinforcement bars (501) of the precast slab or the main reinforcement bars (201) of the composite slab are anchored into the steel bar connecting sleeve (301), and then the concrete in the connection area is poured to form a wet joint (40).

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