Non-rib-out seamless splicing structure of prestressed concrete composite floor slab

Abstract

The utility model discloses a prestressed concrete composite floor slab seamless splicing structure without reinforcing bars, which is characterized in that a plurality of reserved grooves are equidistantly formed in one ends, close to each other, of the upper ends of two prefabricated bottom plates, a thread splicing short reinforcing bar is inserted between the interiors of the two spliced reserved grooves, and a cast-in-place concrete layer covers the thread splicing short reinforcing bar. A plurality of linear reserved grooves or T-shaped reserved grooves are formed in a prefabricated bottom plate at equal intervals, so that distributed steel bars do not need to extend outwards, after seamless butt joint is conducted on the prefabricated bottom plate, linear threaded splicing short ribs or I-shaped threaded splicing short ribs are inserted into the two spliced reserved grooves, and finally concrete is cast in place. In this way, the threaded splicing short ribs are additionally arranged in the grooves to play a role in reinforcing connection, so that no ribs (without horizontal sub-ribs) and seamless tight connection between boards are achieved, and the construction safety and the quality of the spliced concrete prestressed laminated boards are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite slabs, in particular to a prestressed concrete composite floor slab without reinforcement seamless splicing structure. Background Art

[0002] Prestressed concrete composite slabs are formed by prefabricated prestressed thin plates and on-site cast concrete composite layers. They can be applied to buildings for various purposes. The span and load-bearing load of the floor slabs can have a wide range of uses. The commonly used prefabricated concrete (PC) composite slabs currently use prefabricated truss steel bars as the load-bearing skeleton, and the concrete prestressed composite slabs are spliced ​​with extended steel bars (beard bars) on one side. This method is mature in technology, has high strength and reliable connection, but generally speaking, there are still some problems. The biggest problem is that the construction is complicated and the safety is poor. When the concrete prestressed composite slabs are hoisted for splicing, the beard bars can easily scratch the workers, and the splicing gap is wide, requiring formwork and post-casting, which increases the workload of wet operations and the cost, and is not in line with the development direction of green environmental protection. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a prestressed concrete composite floor slab without reinforcement seamless splicing structure to solve the problems existing in the above-mentioned background technology.

[0004] A prestressed concrete composite floor slab seamless splicing structure without reinforcement comprises a prefabricated base plate, prestressed steel bars and distribution steel bars installed vertically and horizontally therein, and a cast-in-place concrete layer arranged above the prefabricated base plate, a plurality of reserved grooves are equidistantly provided at the ends of the upper ends of the two prefabricated base plates close to each other, threaded splicing short bars are inserted between the insides of the two spliced ​​reserved grooves, and the cast-in-place concrete layer covers the threaded splicing short bars.

[0005] Preferably, the threaded spliced ​​short rib is in an I-shape, and the reserved groove is in an I-shape.

[0006] Preferably, the threaded spliced ​​short rib is in an "I" shape, and the reserved groove is in a "T" shape.

[0007] Preferably, the length of the threaded spliced ​​short rib is equal to the sum of the lengths of the two spliced ​​reserved grooves.

[0008] Preferably, the threaded spliced ​​short reinforcement consists of a straight steel bar and two end steel bars, and the two end steel bars are vertically fixed at both ends of the straight steel bar respectively.

[0009] Beneficial effect: By opening multiple "I"-shaped reserved grooves or "T"-shaped reserved grooves at equal intervals on the prefabricated base plate, the distributed steel bars do not need to extend outward. After the prefabricated base plate is seamlessly connected, the "I"-shaped threaded spliced ​​short bars or "I"-shaped threaded spliced ​​short bars are inserted into the two spliced ​​reserved grooves, and finally the concrete is cast in place. In this way, adding threaded spliced ​​short bars in the groove plays a role in reinforcing the connection, so as to achieve no protruding bars (no beard bars) and seamless and tight connection between the plates, thereby improving the construction safety and the quality of the concrete prestressed composite slabs after splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0011] Figure 2 For this utility model Figure 1 Schematic diagram of prefabricated base plate;

[0012] Figure 3 This is a schematic diagram of Embodiment 2 of the present utility model;

[0013] Figure 4 For this utility model Figure 3 Schematic diagram of prefabricated base plate;

[0014] Figure 5 For this utility model Figure 3 Schematic diagram of threaded spliced ​​short reinforcement.

[0015] In the figure: 1-prefabricated base plate, 2-prestressed steel bars, 3-cast-in-place concrete layer, 4-reserved grooves, 5-threaded spliced ​​short bars, 51-straight steel bars, 52-end steel bars, 6-distributed steel bars. DETAILED DESCRIPTION

[0016] Example 1, please refer to Figure 1-Figure 2 A prestressed concrete composite floor slab seamless splicing structure without reinforcement, comprising a prefabricated bottom plate 1, prestressed steel bars 2 and distribution steel bars 6 installed vertically and horizontally inside the prefabricated bottom plate 1, and a cast-in-place concrete layer 3 arranged above the prefabricated bottom plate 1, wherein the prestressed steel bars 2 are evenly arranged at the lower part of the prefabricated bottom plate 1, the spacing between the prestressed steel bars 2 is about 150-200mm, and the distribution steel bars 6 perpendicular to the prestressed steel bars 2 are arranged on the prestressed steel bars 2;

[0017] A plurality of reserved grooves 4 are equidistantly provided at one end of the upper ends of the two precast base plates 1 close to each other, and a threaded splicing short bar 5 is inserted between the two spliced ​​reserved grooves 4, and the cast-in-place concrete layer 3 covers the threaded splicing short bar 5, and the threaded splicing short bar 5 is in an "I" shape, and the reserved groove 4 is also in an "I" shape, and the length of the threaded splicing short bar 5 is equal to the sum of the lengths of the two spliced ​​reserved grooves 4. When splicing two concrete prestressed composite slabs, the two precast base plates 1 are hoisted, and the "I"-shaped reserved grooves 4 of the precast base plates 1 are aligned, and then the "I"-shaped threaded splicing short bar 5 is inserted between the insides of the two spliced ​​reserved grooves 4, and finally concrete is cast on the precast base plates 1 to form a cast-in-place concrete layer 3 and cover the threaded splicing short bar 5. Since the threaded splicing short bar 5 The outer wall has threads, so the bonding effect is better. In this way, by opening a plurality of "I"-shaped reserved grooves 4 at equal intervals on the prefabricated base plate 1, the distributed steel bars 6 do not need to extend outward. After the prefabricated base plate 1 is seamlessly connected, the "I"-shaped threaded spliced ​​short bars 5 are inserted into the two spliced ​​reserved grooves 4, and finally cast-in-place concrete forms a cast-in-place concrete layer 3. In this way, adding threaded spliced ​​short bars 5 in the groove plays a role in reinforcing the connection, so as to achieve no bars (no beard bars) and seamless and tight connection between the plates, thereby improving the construction safety and the quality of the concrete prestressed composite plate after splicing. In addition, the connection between the plates adopts a seamless splicing method, which can be applied to buildings for various purposes. The span and load-bearing load of the floor slab can have a large range of use, simple construction and high safety.

[0018] Example 2, please refer to Figure 3-Figure 5 A prestressed concrete composite floor slab seamless splicing structure without reinforcement, comprising a prefabricated bottom plate 1, prestressed steel bars 2 and distribution steel bars 6 installed vertically and horizontally inside the prefabricated bottom plate 1, and a cast-in-place concrete layer 3 arranged above the prefabricated bottom plate 1, wherein the prestressed steel bars 2 are evenly arranged at the lower part of the prefabricated bottom plate 1, the spacing between the prestressed steel bars 2 is about 150-200mm, and the distribution steel bars 6 perpendicular to the prestressed steel bars 2 are arranged on the prestressed steel bars 2;

[0019] A plurality of reserved grooves 4 are equidistantly provided at one end of the upper ends of the two precast base plates 1 close to each other, and a threaded splicing short bar 5 is inserted between the insides of the two spliced ​​reserved grooves 4, and the threaded splicing short bar 5 is composed of a straight steel bar 51 and two end steel bars 52, and the two end steel bars 52 are vertically fixed to the two ends of the straight steel bar 51, respectively. The cast-in-place concrete layer 3 covers the threaded splicing short bar 5, and the threaded splicing short bar 5 is in an "I" shape, and the reserved grooves 4 are in a "T" shape. The two spliced ​​reserved grooves 4 form an "I" shape, and the length of the threaded splicing short bar 5 is equal to the sum of the lengths of the two spliced ​​reserved grooves 4. When splicing two concrete prestressed composite slabs, the two precast base plates 1 are hoisted, and the "T"-shaped reserved grooves 4 of the precast base plates 1 are aligned, and then the "I"-shaped threaded splicing short bar 5 is inserted between the insides of the two spliced ​​"T"-shaped reserved grooves 4. After that, concrete is cast on the precast base plate 1 to form a cast-in-place concrete layer 3 and cover the threaded spliced ​​short bars 5. Since the outer walls of the straight steel bars 51 and the end steel bars 52 are threaded, the bonding effect is better. In this way, by opening a plurality of "T"-shaped reserved grooves 4 at equal intervals on the precast base plate 1, the distribution steel bars 6 do not need to extend outward. After the precast base plate 1 is seamlessly connected, the "I"-shaped threaded spliced ​​short bars 5 are inserted into the two spliced ​​reserved grooves 4, and finally concrete is cast in place. In this way, adding threaded spliced ​​short bars 5 in the groove plays a role in reinforcing the connection, so as to achieve no bars (no beard bars) and seamless and tight connection between the plates, thereby improving the construction safety and the quality of the concrete prestressed composite plate after splicing. In addition, the connection between the plates adopts a seamless splicing method, which can be applied to buildings for various purposes. The span and load-bearing load of the floor slab can have a large range of use, simple construction and high safety.

Claims

1. A prestressed concrete composite floor slab without reinforcement seamless splicing structure, comprising a prefabricated base plate (1), prestressed steel bars (2) and distribution steel bars (6) installed vertically and horizontally inside the prefabricated base plate, and a cast-in-place concrete layer (3) arranged above the prefabricated base plate (1), characterized in that: A plurality of reserved grooves (4) are equidistantly provided at the ends of the two prefabricated bottom plates (1) that are close to each other, and threaded spliced ​​short bars (5) are inserted between the two spliced ​​reserved grooves (4), and the cast-in-place concrete layer (3) covers the threaded spliced ​​short bars (5).

2. A prestressed concrete composite floor slab seamless splicing structure without reinforcement according to claim 1, characterized in that: The threaded spliced ​​short rib (5) is in the shape of a straight line, and the reserved groove (4) is in the shape of a straight line.

3. The prestressed concrete composite floor slab seamless splicing structure without reinforcement according to claim 1 is characterized by: The threaded spliced ​​short rib (5) is in an "I" shape, and the reserved groove (4) is in a "T" shape.

4. A prestressed concrete composite floor slab seamless splicing structure without reinforcement according to any one of claims 2 or 3, characterized in that: The length of the threaded spliced ​​short rib (5) is equal to the sum of the lengths of the two spliced ​​reserved grooves (4).

5. The prestressed concrete composite floor slab seamless splicing structure without reinforcement according to claim 3 is characterized by: The threaded spliced ​​short reinforcement (5) is composed of a straight reinforcement (51) and two end reinforcements (52), and the two end reinforcements (52) are respectively vertically fixed at the two ends of the straight reinforcement (51).

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