Novel prefabricated slab and profile steel shear wall connecting structure and construction method thereof

Abstract

The invention relates to the technical field of prefabricated building construction, in particular to a novel prefabricated slab and profile steel shear wall connecting structure which comprises a shear wall with an I-shaped profile steel connecting piece fixedly arranged on the end face, and the profile steel connecting piece comprises a lower wing plate fixedly connected with the top face of the shear wall; the prefabricated plate comprises a bottom plate stress rib, the two ends, in the axial direction, of the bottom plate stress rib are exposed out of the concrete layer, an L-shaped clamping opening is formed in the end of the bottom face of the concrete layer, and the clamping opening and the edge of the lower wing plate can be clamped and stopped in the vertical direction. The I-shaped profile steel connecting piece is matched with the L-shaped bayonet, so that the bayonet can be clamped and stopped with the edge of the lower wing plate in the vertical direction, vertical support in prefabricated plate installation is omitted, positioning is convenient, construction is convenient, the installation difficulty of the prefabricated plate and the profile steel shear wall is effectively reduced, and the construction efficiency is improved. And the construction efficiency of prefabricated slab and profile steel shear wall assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and in particular to a novel prefabricated plate and steel shear wall connection structure and a construction method thereof. Background Art

[0002] With the vigorous development of prefabricated buildings, a vertical component connection system using steel sections as connection nodes has emerged. Its key technical point lies in the connection method between prefabricated panels and shear walls.

[0003] At present, there are many forms of vertical connection of mainstream prefabricated concrete structures, such as grouting sleeve grout anchor connection, steel bar overlap, local steel reinforcement anchor connection, etc. However, the above connection structure is complex, the assembly efficiency is low, and the prefabricated panels need to be supported during construction, which brings great difficulties to on-site construction, low construction efficiency, long construction period, and increased costs.

[0004] In the Chinese patent document with application publication number CN109339244A, a prefabricated panel and shear wall connection structure and construction method are disclosed, including a first prefabricated shear wall, a second prefabricated shear wall and a prefabricated panel, the first prefabricated shear wall includes a first shear wall embedded steel section, the second prefabricated shear wall includes a second shear wall embedded steel section, the prefabricated panel includes a C-shaped first plate embedded steel section and a second plate embedded steel section, the first plate embedded steel section is connected to the second plate embedded steel section by bolts, the first shear wall embedded steel section is connected to the first plate embedded steel section and the second plate embedded steel section by bolts, and the second shear wall embedded steel section is connected to the first plate embedded steel section and the second plate embedded steel section by bolts.

[0005] As can be seen from the above, the prefabricated panels and shear walls are assembled by bolting the C-shaped embedded steel connectors at the ends of the prefabricated panels to the embedded steel sections of the shear walls. The connection structure is relatively complex, the installation is difficult, and it is difficult to improve the construction efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a novel prefabricated panel and steel shear wall connection structure and a construction method thereof, so as to reduce the installation difficulty of the prefabricated panel and the steel shear wall and improve the construction efficiency of the prefabricated panel and the steel shear wall assembly.

[0007] In order to solve the above technical problems, the embodiments of the present invention provide a technical solution as follows:

[0008] A novel connection structure of a prefabricated panel and a steel shear wall comprises: a shear wall, wherein an I-shaped steel connector is fixedly provided on the end face of the shear wall, wherein the steel connector comprises a lower wing plate fixedly connected to the top face of the shear wall and an upper wing plate arranged corresponding to the lower wing plate; a prefabricated panel, wherein the prefabricated panel comprises a bottom plate stress reinforcement, and a concrete layer wrapped around the bottom plate stress reinforcement and fixedly provided, wherein both ends of the bottom plate stress reinforcement are exposed outside the concrete layer along the axial direction, a first connector connected to the steel connector is provided on the exposed part of the bottom plate stress reinforcement, and an L-shaped bayonet is provided at the end of the bottom surface of the concrete layer, wherein the bayonet can be engaged with the edge of the lower wing plate in the vertical direction for blocking.

[0009] Furthermore, the bayonet includes a vertical clamping surface and a stop surface extending horizontally outward along the upper end of the clamping surface, the vertical height of the clamping surface is not less than the thickness of the steel section, and the horizontal extension width of the stop surface is not greater than half of the difference in width between the lower wing plate and the upper wing plate of the steel section connector.

[0010] Furthermore, the first connecting member is provided with a bent portion bent toward one side in the horizontal direction, and the length of the bent portion is not less than 5 times the diameter of the bottom plate stress reinforcement.

[0011] Furthermore, the first connecting member is fixedly connected to the steel connecting member by welding.

[0012] Furthermore, the prefabricated panel also includes truss bars fixedly connected to the bottom plate force reinforcement bars, and the truss bars are partially exposed on the upper part of the concrete layer.

[0013] Furthermore, it comprises a sealing member, wherein the sealing member is arranged between the bayonet and the lower wing plate.

[0014] In order to solve the above technical problems, the embodiments of the present invention further provide a technical solution as follows:

[0015] A construction method of a novel prefabricated panel and steel shear wall connection structure, comprising the novel prefabricated panel and steel shear wall connection structure as described in any one of the above items, comprising the following steps:

[0016] Install and adjust shear walls;

[0017] Calculate the length of the hoisting wire rope according to the length of the prefabricated board. The hoisting wire rope includes a long rope and a short rope. After the prefabricated board is hoisted, it is tilted up and down.

[0018] Lift the precast panel to the top of the shear wall, lower the lower end of the precast panel so that its bayonet is engaged with the lower wing plate of the steel connector, and then lower the other end of the precast panel until the bayonet is engaged with the lower wing plate of the steel connector;

[0019] The first connecting piece is welded and fixed to the steel connecting piece.

[0020] Furthermore, after the prefabricated panel is lifted, it is in an up and down tilted state, and the tilt angle between the surface of the prefabricated panel and the horizontal plane is 1° to 5°.

[0021] Furthermore, after the prefabricated panel bayonet is connected to the lower wing plate of the steel connector, the installation dimensions of the prefabricated panel need to be measured, and the prefabricated panels whose installation dimensions do not meet the standards need to be corrected.

[0022] Furthermore, the welding and fixing of the first connecting member and the steel connecting member includes welding along two sides of the first connection, and the lengths of the welds on both sides are not less than 5 times the diameter of the bottom plate stress reinforcement.

[0023] Compared with the prior art, the novel prefabricated panel and steel shear wall connection structure and the construction method thereof provided by the present invention have an I-shaped steel connection piece and an L-shaped bayonet, so that the bayonet can be engaged with the edge of the lower wing plate in the vertical direction to stop, thereby eliminating the vertical support in the installation of the prefabricated panel, facilitating positioning and construction, effectively reducing the installation difficulty of the prefabricated panel and the steel shear wall, and improving the construction efficiency of the assembly of the prefabricated panel and the steel shear wall; through the arrangement of the first connection piece and the bending portion, the tension between the two sides of the bottom plate stress reinforcement can be effectively reduced. The distance between the first and second connectors at the ends is reduced, which reduces the probability of interference between the exposed part of the bottom plate reinforcement and the steel connector during installation, increases the convenience of assembly construction of the prefabricated panels and shear walls, reduces the difficulty of installation of the prefabricated panels and steel shear walls, and improves the construction efficiency of assembly of the prefabricated panels and steel shear walls. At the same time, through the setting of the bending part, the anchoring length of the first connector and the steel connector can be effectively guaranteed, and an effective connection between the panel and the wall can be achieved, which prevents the prefabricated panel from becoming unstable during construction and improves the quality and safety of the installation construction of the prefabricated panels and steel shear walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 Schematic diagram of the assembly structure of prefabricated panels and shear walls in an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the AA section structure;

[0027] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the local A in the middle;

[0028] Figure 4 is a schematic diagram of the structure of a prefabricated panel in one embodiment of the present invention;

[0029] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle BB section;

[0030] Figure 6 yes Figure 4 Schematic diagram of the CC cross-section structure;

[0031] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of the local C in the middle;

[0032] Figure 8 is a schematic diagram of a prefabricated panel structure in another embodiment of the present invention;

[0033] Fig. 9 yes Figure 8 Schematic diagram of the structure of the middle DD section;

[0034] Figure 10-13 It is a schematic diagram of the assembly process of the prefabricated panels and the shear walls in an embodiment of the present invention.

[0035] Explanation of the reference numerals in the accompanying drawings: 10, precast panel; 20, shear wall; 21, steel connector; 211, upper wing plate; 212, lower wing plate; 30, sealing member; 40, bottom plate tension reinforcement; 41, first connector; 411, bending portion; 42, second connector; 50, truss reinforcement; 60, concrete layer; 61, bayonet; 611, snap-fit ​​surface; 612, stop surface; 70, lifting wire rope; 71, short rope; 72, long rope. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the claims of the present application can be implemented.

[0037] like Figure 1-3As shown, one embodiment of the present invention relates to a novel connection structure of a prefabricated panel and a steel shear wall, comprising: a shear wall 20, an I-shaped steel connector 21 being fixedly provided on the end face of the shear wall 20, the steel connector 21 comprising a lower wing plate 212 fixedly connected to the top face of the shear wall 20 and an upper wing plate 211 arranged corresponding to the lower wing plate 212; a prefabricated panel 10, the prefabricated panel 10 comprising a bottom plate stress reinforcement 40, and a concrete layer 60 fixedly arranged to wrap the bottom plate stress reinforcement 40, the bottom plate stress reinforcement 40 being arranged in a criss-cross pattern, the end portions of the bottom plate stress reinforcement 40 extending in the axial direction being exposed outside the concrete layer 60, the exposed portion of the bottom plate stress reinforcement 40 comprising a first connector 41 connected to the steel connector 21, and a second connector 42 connected to an adjacent prefabricated panel 10, an L-shaped bayonet 61 being provided at the bottom end of the concrete layer 60, the bayonet 61 being able to be engaged and stopped with the edge of the lower wing plate 212 in the vertical direction. By cooperating with the I-shaped steel connector 21 and the L-shaped bayonet 61, the bayonet 61 can be engaged with the edge of the lower wing plate 212 in the vertical direction, eliminating the vertical support in the installation of the prefabricated panel 10, facilitating positioning and construction, and effectively reducing the difficulty of installing the prefabricated panel 10 and the steel shear wall 20.

[0038] like Figure 4-7 As shown, in one embodiment, it involves a novel prefabricated panel and steel shear wall connection structure, including a prefabricated panel 10, the prefabricated panel 10 includes a bottom plate stress reinforcement 40, and a concrete layer 60 wrapped with the bottom plate stress reinforcement 40 and fixedly arranged, the bottom plate stress reinforcement 40 is arranged in a criss-cross pattern, the bottom plate stress reinforcement 40 extends along the axial end and is exposed outside the concrete layer 60, the exposed part of the bottom plate stress reinforcement 40 includes a first connector 41 connected to the steel connector 21, and a second connector 42 connected to the adjacent prefabricated panel 10; the first connector 41 is provided with a bending portion 411 bent toward one side in the horizontal direction, and the length of the bending portion 411 is not less than 5 times the diameter of the bottom plate stress reinforcement 40, the diameter of the bottom plate stress reinforcement 40 is set to d, and the length of the bending portion 411 is set to L1, that is, L1≥5d; the first connecting member 41 is abutted against the upper surface of the lower wing plate 212, preferably, the first connecting member 41 is welded and fixed to the steel connecting member 21, specifically including welding along both sides of the first connecting member 41, and the length of the welds on both sides is not less than 5 times the diameter of the bottom plate stress reinforcement 40; the second connecting member 42 extends axially along the bottom plate stress reinforcement 40, and the extension length is not less than 5 times the diameter of the bottom plate stress reinforcement 40, and the extension length of the second connecting member 42 is L2, that is, L2≥5d.

[0039] In one embodiment, a novel connection structure between a precast panel 10 and a steel shear wall 20 is provided, which also includes a truss bar 50. The truss bar 50 is fixedly connected to the bottom plate force bar 40. Part of the truss bar 50 is exposed on the upper part of the concrete layer 60. By setting the truss bar 50, the rigidity and shear bearing capacity of the precast panel 10 can be enhanced. At the same time, the upper chord steel bars of the truss bar 50 can be used as a hanging point, and there is no need to set a separate hanging point on the precast panel 10.

[0040] In one embodiment, a novel connection structure between a precast panel 10 and a steel shear wall 20 is provided. A snap-in 61 is provided at a concrete layer 60 at the bottom of the precast panel 10 toward the steel connector 21. The snap-in 61 includes a vertical snap-in surface 611 and a stop surface 612 extending horizontally outward from the upper end of the snap-in surface 611. The vertical height of the snap-in surface 611 is not less than the thickness of the steel, and the horizontally extending width of the stop surface 612 is not greater than half of the width difference between the lower wing plate 212 and the upper wing plate 211 of the steel connector 21. In an exemplary example, the height of the snap-fit ​​surface 611 is the same as the thickness of the lower wing plate 212, so that when the snap-fit ​​61 and the steel connector 21 are assembled in place, the lower bottom surface of the prefabricated panel 10 is flush with the lower bottom surface of the lower wing plate 212, so that the steel lower wing plate 212 is horizontally blocked by the prefabricated panel 10 into a hidden state, thereby helping to prevent cracks at the base of the wall corner during subsequent wall plastering construction; the horizontal extension width D of the stop surface 612 is (d1-d2)-10, where d1 is the width of the lower wing plate 212, and d2 is the width of the upper wing plate 211, and the unit is mm.

[0041] like Figure 3 As shown, in one embodiment, it involves a new type of prefabricated panel and steel shear wall connection structure, which also includes a seal 30, which is arranged between the bayonet 61 and the lower wing plate 212. The seal 30 can be any one or a combination of foam tape, sponge sealing strip, cement mortar, and the seal 30 is used to seal the gap between the bayonet 61 and the lower wing plate 212, so as to reduce the leakage of slurry from the connection between the prefabricated panel 10 and the shear wall 20 during the subsequent grouting construction operation.

[0042] like Figure 8-9As shown, in one embodiment, it involves a novel prefabricated panel and steel shear wall connection structure, including a prefabricated panel 10, wherein the prefabricated panel 10 includes a bottom plate stress reinforcement 40, and a concrete layer 60 wrapped around the bottom plate stress reinforcement 40 and fixedly arranged, the bottom plate stress reinforcement 40 is crisscrossed, and the three sides of the prefabricated panel 10 are connected to the shear wall 20 provided with steel connectors 21, and the three sides corresponding to the bottom plate stress reinforcement 40 and the shear wall 20 are provided with a first connector 41, and the first connector 41 is provided with a bending portion 411, the diameter of the bottom plate stress reinforcement 40 is set to d, and the length of the bending portion 411 is set to L1, that is, L1≥5d; the bending portion 411 is used for fixed connection with the lower wing plate 212 of the steel connector 21.

[0043] like Figure 10-13 As shown, in one embodiment provided by the present invention, it also relates to a construction method of a novel prefabricated panel and steel shear wall connection structure, which is used for the construction of the novel prefabricated panel and steel shear wall connection structure. The construction method includes any one of the novel prefabricated panel and steel shear wall connection structures, and the steps are as follows: first, according to the construction requirements, the prefabricated panel 10 and the shear wall 20 are processed and produced at the factory end, and transported to the construction site, which helps to improve the efficiency of on-site construction and shorten the construction period;

[0044] Then, the shear wall 20 is installed and adjusted on site.

[0045] After the shear wall 20 is installed, the prefabricated panel 10 is hoisted. Since the length of the prefabricated panel 10 and its bottom plate force reinforcement 40 is greater than the spacing between the steel connectors 21 of two adjacent shear walls 20, the prefabricated panel 10 needs to be installed at an angle. Preferably, the inclination angle between the surface of the prefabricated panel 10 and the horizontal plane is 1° to 5°.

[0046] The length of the lifting wire rope 70 is calculated according to the tilt angle and the length of the precast panel 10. In order to make the precast panel 10 tilted after being lifted, the lifting wire rope 70 is provided with a long rope 72 and a short rope 71, which are connected at different lifting points through the long rope 72 and the short rope 71, so that the precast panel 10 is tilted after being lifted.

[0047] After the hoisting wire rope 70 is fixedly connected to the lifting point of the prefabricated panel 10, the prefabricated panel 10 is hoisted above the shear wall 20, and the lower end of the prefabricated panel 10 is lowered back so that its bayonet 61 is engaged with the lower wing plate 212 of the steel connector 21, and then the other end of the prefabricated panel 10 is lowered back until the bayonet 61 is engaged with the lower wing plate 212 of the steel connector 21; after the bayonet 61 of the prefabricated panel 10 is engaged with the lower wing plate 212 of the steel connector 21, it is necessary to measure the installation dimensions of the prefabricated panel 10, and correct the prefabricated panel 10 whose installation dimensions do not meet the standards. Correction can be performed using tools such as a crowbar.

[0048] After the correction is completed, the first connector 41 is welded and fixed to the steel connector 21, specifically including welding along both sides of the first connector 41, and the length of the welds on both sides is not less than 5 times the diameter of the bottom plate force reinforcement 40. By welding and fixing the first connector 41 to the lower wing plate 212 of the steel connector 21, the stability of the relative position of the prefabricated panel 10 and the shear wall 20 is effectively guaranteed, and the effective connection between the prefabricated panel 10 and the shear wall 20 is achieved, preventing the prefabricated panel from becoming unstable during construction, and effectively improving the quality and safety of the installation and construction of the prefabricated panel and the steel shear wall.

[0049] In an exemplary embodiment, a 6m precast panel 10 is taken as an example, and its inclination angle is set to 1°. There are 4 hoisting wire ropes 70 (9), which are designed to be 2 long and 2 short according to the angle. According to the length of the precast panel 10, the inclination angle is increased by 1° for every 1m reduction in the length of the precast panel 10. The hoisting wire ropes 70 are connected to the precast panel 10 through shackles and embedded lifting rings, or connected to the lifting points of the truss reinforcement 50.

[0050] Compared with the prior art, the novel prefabricated panel and steel shear wall connection structure and the construction method thereof provided by the present invention have an I-shaped steel connection piece and an L-shaped bayonet, so that the bayonet can be engaged with the edge of the lower wing plate in the vertical direction to stop, thereby eliminating the vertical support in the installation of the prefabricated panel, facilitating positioning and construction, effectively reducing the installation difficulty of the prefabricated panel and the steel shear wall, and improving the construction efficiency of the assembly of the prefabricated panel and the steel shear wall; through the arrangement of the first connection piece and the bending portion, the tension between the two sides of the bottom plate stress reinforcement can be effectively reduced. The distance between the first and second connectors at the ends is reduced, which reduces the probability of interference between the exposed part of the bottom plate reinforcement and the steel connector during installation, increases the convenience of assembly construction of the prefabricated panels and shear walls, reduces the difficulty of installation of the prefabricated panels and steel shear walls, and improves the construction efficiency of assembly of the prefabricated panels and steel shear walls. At the same time, through the setting of the bending part, the anchoring length of the first connector and the steel connector can be effectively guaranteed, and an effective connection between the panel and the wall can be achieved, which prevents the prefabricated panel from becoming unstable during construction and improves the quality and safety of the installation construction of the prefabricated panels and steel shear walls.

[0051] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A new type of prefabricated panel and steel shear wall connection structure, characterized in that: include: A shear wall (20), wherein an I-shaped steel connector (21) is fixedly provided on the end surface of the shear wall (20), wherein the steel connector (21) comprises a lower wing plate (212) fixedly connected to the top surface of the shear wall (20) and an upper wing plate (211) arranged corresponding to the lower wing plate (212); a precast panel (10), wherein the precast panel (10) comprises a bottom plate stress reinforcement (40), and a concrete layer (60) fixedly arranged to wrap the bottom plate stress reinforcement (40), wherein both ends of the bottom plate stress reinforcement (40) are exposed outside the concrete layer (60) along the axial direction, and a first connector (41) connected to the steel connector (21) is provided on the exposed portion of the bottom plate stress reinforcement (40), and an L-shaped bayonet (61) is provided at the bottom end of the concrete layer (60), and the bayonet (61) can be engaged with the edge of the lower wing plate (212) in the vertical direction for blocking.

2. The novel prefabricated panel and steel shear wall connection structure according to claim 1 is characterized in that: The bayonet (61) comprises a vertically extending clamping surface (611) and a stop surface (612) extending horizontally outward along the upper end of the clamping surface (611); the vertical height of the clamping surface (611) is not less than the thickness of the steel section; and the horizontally extending width of the stop surface (612) is not greater than half of the difference between the width of the lower wing plate (212) and the upper wing plate (211) of the steel section connector (21).

3. The novel prefabricated panel and steel shear wall connection structure according to claim 1 is characterized in that: The first connecting member (41) is provided with a bent portion (411) bent toward one side in the horizontal direction, and the length of the bent portion (411) is not less than 5 times the diameter of the bottom plate stress rib (40).

4. The novel prefabricated panel and steel shear wall connection structure according to claim 3 is characterized in that: The first connecting piece (41) is fixedly connected to the steel connecting piece (21) by welding.

5. The novel prefabricated panel and steel shear wall connection structure according to claim 1 is characterized in that: The prefabricated plate (10) further comprises truss bars (50) fixedly connected to the bottom plate stress-bearing bars (40), and a portion of the truss bars (50) is exposed above the concrete layer (60).

6. The novel prefabricated panel and steel shear wall connection structure according to any one of claims 1 to 5, characterized in that: It comprises a sealing member (30), wherein the sealing member (30) is arranged between the bayonet (61) and the lower wing plate (212).

7. A new construction method for connecting a prefabricated panel and a steel shear wall, characterized in that: A novel prefabricated panel (10) and a steel shear wall (20) connection structure comprising any one of claims 1 to 6, comprising the following steps: Install and adjust the shear wall (20); The length of the hoisting steel wire rope (70) is calculated according to the length of the prefabricated panel (10), wherein the hoisting steel wire rope (70) comprises a long rope (72) and a short rope (71), and the prefabricated panel (10) is in an up and down tilted state after being hoisted; The prefabricated plate (10) is hoisted above the shear wall (20), and the lower end of the prefabricated plate (10) is lowered so that the bayonet (61) thereof is engaged with the lower wing plate (212) of the steel connecting piece (21), and the other end of the prefabricated plate (10) is lowered until the bayonet (61) is engaged with the lower wing plate (212) of the steel connecting piece (21); The first connecting piece (41) is fixed to the steel connecting piece (21) by welding.

8. The construction method of the novel prefabricated panel and steel shear wall connection structure according to claim 7 is characterized in that: After the prefabricated plate (10) is hoisted, it is in an up-and-down tilted state, and the tilt angle between the surface of the prefabricated plate (10) and the horizontal plane is 1° to 5°.

9. The construction method of the novel prefabricated panel and steel shear wall connection structure according to claim 7 is characterized in that: After the bayonet (61) of the prefabricated panel (10) is connected to the lower wing plate (212) of the steel connector (21), the installation dimensions of the prefabricated panel (10) need to be measured, and the prefabricated panel (10) whose installation dimensions do not meet the standards needs to be corrected.

10. The construction method of the novel prefabricated panel and steel shear wall connection structure according to claim 7 is characterized in that: The welding and fixing of the first connecting member (41) and the steel connecting member (21) comprises welding along both sides of the first connecting member (41), and the length of the welds on both sides is not less than 5 times the diameter of the bottom plate stress reinforcement (40).

Images