Prefabricated concrete slab structure and dry connection method thereof

Abstract

The present invention provides an assembled concrete slab structure and a dry connection method thereof, wherein the left side slab end is provided with a slab end lower notch, a left slab reserved steel bar, a reserved bolt channel and a left U-shaped bolt channel; the right side slab end is provided with a slab end upper notch, a right slab reserved steel bar and a right U-shaped bolt channel; the left side connecting piece is welded by a left slab steel bar sleeve, a steel bar ring and a left slab steel bar; the right side connecting piece is welded by a right slab steel bar sleeve, a bolt and a right slab steel bar; the left side connecting piece and the right side connecting piece are respectively connected to the left slab reserved steel bar and the right slab reserved steel bar, the left side slab is overlapped on the notch of the right side slab, the bolt of the right side connecting piece passes through the steel bar ring and the reserved bolt channel of the left side connecting piece and is tightened by a nut, and finally the U-shaped bolt is connected. The advantages of the present invention are that the connection method adopts dry operation construction, which is energy-saving and environmentally friendly, and simplifies construction; the connection is reliable, the integrity is good, and the rigidity is significantly improved; its industrialization efficiency is significantly improved, and it can be universalized and standardized.

Description

Technical Field

[0001] The present invention belongs to the technical field of assembled buildings, and in particular relates to an assembled concrete slab structure and a dry connection method thereof. Background Art

[0002] Prefabricated concrete buildings refer to concrete structures that are mainly prefabricated concrete components produced in factories and designed and constructed by on-site assembly. The assembly methods of components generally include post-cast integral structures, fully assembled structural connections, etc., and steel bar connections can be made by sleeve grouting connections, steel bar grout anchor lap connections, etc. In the 1980s, the prefabricated large-panel houses that were popular in my country had many hidden dangers and defects that affected structural safety and normal use due to poor structural integrity, leakage, floor cracks, etc., and were gradually replaced by cast-in-place concrete structures. However, with the current application of emerging prefabricated concrete structures, especially the introduction of many advanced foreign technologies in recent years, new localized prefabricated concrete structure construction technologies are gradually taking shape.

[0003] my country began to study the design and construction technology of prefabricated concrete buildings in the 1950s and 1960s, and formed a series of prefabricated concrete building systems. The more typical building systems include prefabricated single-story industrial plant building system, prefabricated multi-story frame building system, prefabricated large-plate building system, etc. By the 1980s, the application of prefabricated concrete buildings reached its heyday, and many places across the country had formed a prefabricated concrete industrialized building model that integrated design, production, construction and installation. Prefabricated concrete buildings and masonry buildings with prefabricated hollow slabs have become the two most important building systems, with an application penetration rate of more than 70%. Due to the many limitations and shortcomings of the functions and physical properties of prefabricated buildings, the research and development level of prefabricated concrete building design and construction technology in my country has not kept up with the changes in social demand and the development of construction technology. By the mid-1990s, prefabricated concrete buildings had gradually been replaced by fully cast-in-place concrete building systems. At present, except for the widespread application of prefabricated single-story industrial plant building systems, other prefabricated and assembled building systems are rarely used in engineering. Insufficient specialized research on the integrity of prefabricated structures’ shear resistance and design and construction management has resulted in poor technical integrity, which is the fundamental reason why prefabricated structures have been in a state of stagnation for a long time. Summary of the invention

[0004] 1. Purpose of the invention:

[0005] The purpose of the present invention is to solve the problems of complex on-site construction and poor integrity of existing nodes, and to propose a dry connection method with simple construction and high shear strength. The method has reliable connection, good integrity, excellent shear resistance, significantly improved stiffness, significantly improved industrial efficiency, and can achieve universalization and standardization.

[0006] 2. The technical solution adopted by the present invention is as follows:

[0007] The present invention is an assembled concrete slab structure and a dry connection method thereof, characterized in that: it comprises a left precast concrete slab, a right precast concrete slab, a left connecting piece, a right connecting piece, a steel plate, a nut, and a U-shaped bolt; the left precast concrete slab and the right precast concrete slab are fixedly connected by the left connecting piece, the right connecting piece, the steel plate, the nut, and the U-shaped bolt; the left connecting piece is located at the upper part of the lower notch of the plate end of the left precast concrete slab, and is fixedly connected to the reserved steel bars of the left plate through the left steel bar sleeve; the right connecting piece is located at the lower part of the upper notch of the plate end of the right precast concrete slab, and is fixedly connected to the reserved steel bars of the right plate through the right steel bar sleeve; the steel plate is located at the upper end of the connection part of the left precast concrete slab and the right precast concrete slab, and a bolt hole is provided at the central part, and the bolt and the nut are fixedly connected to each other; the U-shaped bolt is located at the lower end of the connection part of the left precast concrete slab and the right precast concrete slab, and is connected to each other through the left U-shaped bolt channel and the right U-shaped bolt channel;

[0008] Furthermore, the left precast concrete slab mainly includes a left precast concrete slab body, a lower notch at the slab end, reserved steel bars at the left slab, a reserved bolt channel, and a left U-shaped bolt channel; the lower notch at the slab end matches the slab end of the right precast concrete slab, and the position of the reserved bolt channel corresponds to the bolt of the right connecting piece;

[0009] Furthermore, the right precast concrete slab mainly includes a right precast concrete slab body, a notch on the slab end, reserved steel bars on the right slab, and a right U-shaped bolt channel; the notch on the slab end coincides with the slab end of the left precast concrete slab;

[0010] Furthermore, the left connecting piece mainly includes a left steel bar sleeve, a steel bar ring, and a left steel bar; the position of the steel bar ring corresponds to the bolt of the right connecting piece;

[0011] Furthermore, the right connecting piece mainly includes a right steel bar sleeve, a bolt, and a right steel bar; the position of the bolt corresponds to the steel bar ring of the left connecting piece;

[0012] Furthermore, the installation steps are:

[0013] (a) The left connecting piece and the right connecting piece are respectively fixedly connected to the left plate reserved steel bars and the right plate reserved steel bars through the left steel bar sleeve and the right steel bar sleeve;

[0014] (b) The lower notch at the plate end is connected to the upper notch at the plate end, and the bolts are threaded through the steel ring and the reserved bolt channel;

[0015] (c) The upper ends of the connection parts of the left precast concrete slab and the right precast concrete slab are fixedly connected by steel plates, nuts and bolts; the lower ends are fixedly connected to the left U-shaped bolt channel and the right U-shaped bolt channel by U-shaped bolts.

[0016] Beneficial effects of the present invention:

[0017] The effects and advantages of the present invention are that the connection method adopts dry construction, the connection parts are simple, the construction is simplified, the connection is reliable, the integrity is good, and it has excellent shear resistance, which significantly improves its industrialization efficiency and can achieve universalization and standardization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the dry connection between the boards;

[0019] Figure 2 It is the structural schematic diagram of the precast concrete slab on the left;

[0020] Figure 3 It is the structural schematic diagram of the precast concrete slab on the right;

[0021] Figure 4 It is a structural schematic diagram of the left connecting part;

[0022] Figure 5 It is a structural schematic diagram of the right connecting part;

[0023] Figure 6 It is a structural schematic diagram of the steel plate;

[0024] Figure 7 It is a structural diagram of the steel bar connection node.

[0025] In the figure, 1 is the left precast concrete slab; 2 is the right precast concrete slab; 3 is the left connecting piece; 4 is the right connecting piece; 5 is a steel plate; 6 is a nut; 7 is a U-shaped bolt; 1-1 is the left precast concrete slab body; 1-2 is the lower notch at the slab end; 1-3 is the reserved steel bar of the left slab; 1-4 is the reserved bolt channel; 1-5 is the left U-shaped bolt channel; 2-1 is the right precast concrete slab body; 2-2 is the upper notch at the slab end; 2-3 is the reserved steel bar of the right slab; 2-4 is the right U-shaped bolt channel; 3-1 is the left steel bar sleeve; 3-2 is the steel bar ring; 3-3 is the left steel bar; 4-1 is the right steel bar sleeve; 4-2 is a bolt; 4-3 is the right steel bar; 5-1 is a bolt hole. DETAILED DESCRIPTION

[0026] In order to further illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0027] The assembled concrete slab structure and dry connection method thereof proposed by the present invention are as follows Figure 1 to Figure 7 The assembled concrete slab structure comprises a left precast concrete slab (1), a right precast concrete slab (2), a left connecting piece (3), a right connecting piece (4), a steel plate (5), a nut (6), and a U-shaped bolt (7); the left precast concrete slab (1) and the right precast concrete slab (2) are fixedly connected by the left connecting piece (3), the right connecting piece (4), the steel plate (5), the nut (6), and the U-shaped bolt (7); the left connecting piece (3) is located at the upper part of the lower notch (1-2) of the plate end of the left precast concrete slab (1), and is connected to the left precast concrete slab through the left steel bar sleeve (3-1). The right side connecting piece (4) is located at the lower part of the notch (2-2) on the plate end of the right precast concrete plate (2), and is fixedly connected to the reserved steel bars (2-3) of the right plate through the right piece steel bar sleeve (4-1); the steel plate (5) is located at the upper end of the connection part of the left precast concrete plate (1) and the right precast concrete plate (2), and a bolt hole (5-1) is provided at the center part, through which the bolt (4-2) and the nut (6) are fixedly connected to each other; the U-shaped bolt (7) is located at the lower end of the connection part of the left precast concrete plate (1) and the right precast concrete plate (2), and is connected to each other through the left U-shaped bolt channel (1-5) and the right U-shaped bolt channel.

[0028] The left precast concrete slab (1) mainly comprises a left precast concrete slab body (1-1), a lower notch at the slab end (1-2), reserved steel bars (1-3) at the left slab, a reserved bolt channel (1-4), and a left U-shaped bolt channel (1-5); the lower notch at the slab end (1-2) matches the slab end of the right precast concrete slab (2), and the position of the reserved bolt channel (1-4) corresponds to the bolt (4-2) of the right connecting member.

[0029] The right precast concrete slab (2) mainly comprises a right precast concrete slab body (2-1), a notch (2-2) on the slab end, right slab reserved steel bars (2-3), and a right U-shaped bolt channel (2-4); the notch (2-2) on the slab end coincides with the slab end of the left precast concrete slab (1).

[0030] The left connecting piece (3) mainly comprises a left steel bar sleeve (3-1), a steel bar ring (3-2), and a left steel bar (3-3); the position of the steel bar ring (3-2) corresponds to the bolt (4-2) of the right connecting piece (4).

[0031] The right connecting piece (4) mainly comprises a right steel bar sleeve (4-1), a bolt (4-2), and a right steel bar (4-3); the position of the bolt (4-2) corresponds to the steel bar ring (3-2) of the left connecting piece.

[0032] The installation steps are:

[0033] (a) The left connecting piece (3) and the right connecting piece (4) are respectively fixedly connected to the left plate reserved steel bars (1-3) and the right plate reserved steel bars (2-3) through the left steel bar sleeve (3-1) and the right steel bar sleeve (4-1);

[0034] (b) the lower notch (1-2) at the plate end is connected to the upper notch (2-2) at the plate end, and the bolt (4-2) is passed through the steel ring (3-2) and the reserved bolt channel (1-4);

[0035] (c) The upper ends of the connection parts of the left precast concrete slab (1) and the right precast concrete slab (2) are fixedly connected to the bolts (4-2) via a steel plate (5) and a nut (6); and the lower ends are fixedly connected to the left U-shaped bolt channel (1-5) and the right U-shaped bolt channel (2-4) via a U-shaped bolt (7).

Claims

1. An assembled concrete slab structure, characterized in that: The invention comprises a left precast concrete slab (1), a right precast concrete slab (2), a left connecting piece (3), a right connecting piece (4), a steel plate (5), a nut (6), and a U-shaped bolt (7); the left precast concrete slab (1) and the right precast concrete slab (2) are fixedly connected by the left connecting piece (3), the right connecting piece (4), the steel plate (5), the nut (6), and the U-shaped bolt (7); the left connecting piece (3) is located at the upper part of the lower notch (1-2) of the plate end of the left precast concrete slab (1), and is fixedly connected to the reserved steel bars (1-3) of the left plate by a left steel bar sleeve (3-1); the right connecting piece (4) is located at the upper part of the plate end of the right precast concrete slab (2) The lower part of the notch (2-2) is fixedly connected to the reserved steel bar (2-3) of the right plate through the right steel bar sleeve (4-1); the steel plate (5) is located at the upper end of the connection part of the left precast concrete plate (1) and the right precast concrete plate (2), and a bolt hole (5-1) is provided at the center part, and the bolt (4-2) passes through the bolt hole (5-1) and is fixedly connected to the nut (6); the U-shaped bolt (7) is located at the lower end of the connection part of the left precast concrete plate (1) and the right precast concrete plate (2), and is respectively connected to the left precast concrete plate (1) and the right precast concrete plate (2) through the left U-shaped bolt channel (1-5) and the right U-shaped bolt channel (2-4); The left precast concrete slab (1) mainly comprises a left precast concrete slab body (1-1), a lower notch (1-2) at the slab end, reserved steel bars (1-3) at the left slab, a reserved bolt channel (1-4), and a left U-shaped bolt channel (1-5); the lower notch (1-2) at the slab end matches the slab end of the right precast concrete slab (2), and the position of the reserved bolt channel (1-4) corresponds to the bolt (4-2) of the right connecting piece; The right precast concrete slab (2) mainly comprises a right precast concrete slab body (2-1), a notch (2-2) on the slab end, right slab reserved steel bars (2-3), and a right U-shaped bolt channel (2-4); the notch (2-2) on the slab end coincides with the slab end of the left precast concrete slab (1).

2. The assembled concrete slab structure according to claim 1, characterized in that: The left connecting piece (3) mainly comprises a left steel bar sleeve (3-1), a steel bar ring (3-2), and a left steel bar (3-3); a plurality of left steel bar sleeves (3-1) are on a plane and are parallel to each other, the end of each left steel bar sleeve (3-1) is respectively connected to a steel bar ring (3-2), and the left steel bars (3-3) pass through the steel bar rings (3-2) one by one; the position of the steel bar ring (3-2) corresponds to the bolt (4-2) of the right connecting piece (4).

3. The assembled concrete slab structure according to claim 1, characterized in that: The right connecting piece (4) mainly comprises a right steel bar sleeve (4-1), a bolt (4-2), and a right steel bar (4-3); a plurality of bolts (4-2) are in a plane and parallel to each other, each bolt (4-2) is vertically connected to a right steel bar sleeve (4-1), the right steel bar sleeves (4-1) are in a plane and parallel to each other, and the right steel bar (4-3) is located in a right angle formed by the right steel bar sleeve (4-1) and the bolt (4-2); the position of the bolt (4-2) corresponds to the steel bar ring (3-2) of the left connecting piece.

4. A dry installation method for an assembled concrete slab structure according to claim 1, characterized in that The installation steps are: (a) The left connecting piece (3) and the right connecting piece (4) are respectively fixedly connected to the left plate reserved steel bars (1-3) and the right plate reserved steel bars (2-3) through the left steel bar sleeve (3-1) and the right steel bar sleeve (4-1); (b) the lower notch (1-2) of the plate end is connected to the upper notch (2-2) of the plate end, and the bolt (4-2) passes through the steel ring (3-2) and the reserved bolt channel (1-4); (c) The upper ends of the connection parts of the left precast concrete slab (1) and the right precast concrete slab (2) are fixedly connected to the bolts (4-2) via the steel plates (5) and nuts (6); and the lower ends are fixedly connected to the left U-shaped bolt channel (1-5) and the right U-shaped bolt channel (2-4) via the U-shaped bolts (7).

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