Distributed connection precast floor slabs based on UHPC anchored steel reinforcement bridging skeleton

Abstract

This invention discloses a distributed connection precast floor slab based on a UHPC-anchored rebar bridging skeleton, belonging to the field of prefabricated building technology. It includes a precast floor slab, a rebar bridging skeleton, and UHPC. The precast floor slab has distributed connection grooves, ordinary rebar, and rebar to be connected. The distributed connection grooves are dispersed along the boundaries of adjacent precast floor slabs, and the spacing and planar dimensions can be flexibly designed according to stress requirements. The ordinary rebar adopts a conventional double-layer, bidirectional design. Ultra-high performance concrete is poured into the distributed connection grooves, anchoring the rebar bridging skeleton inside. This invention fully utilizes the high performance of ultra-high performance concrete and its excellent anchoring performance with the rebar bridging skeleton to ensure the reliability of the rebar connection. The distributed design optimizes material usage, and the groove form eliminates the need for formwork support at the floor slab joints, providing a scientific solution with high efficiency and performance for the design challenges of integral joints in precast floor slabs.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a distributed connection fully prefabricated floor slab based on a UHPC anchored steel reinforcement bridging skeleton. Background Technology

[0002] Prefabricated buildings serve as an important vehicle for promoting the transformation, upgrading, and high-quality development of my country's construction industry, with prefabricated concrete structures being the most widely used. Among various prefabricated components, floor slabs have become the most common prefabricated component in prefabricated concrete structures due to their large usage and high degree of standardization, and their market application prospects are broad.

[0003] Currently, prefabricated floor slabs in China mainly adopt composite slab technology, which involves prefabricating a concrete base slab in a factory. This base slab serves both as a load-bearing component of the floor slab and as a permanent formwork for on-site pouring. After the base slab is installed, a layer of composite concrete is poured on-site to form the integral floor slab. However, this process still suffers from problems such as a large amount of on-site wet work, negatively impacting environmental protection and construction efficiency. Furthermore, the relatively small amount of concrete used in the prefabricated base slab leads to more frequent hoisting operations, hindering improvements in construction efficiency and effective cost control. Fully prefabricated floor slabs, with their more pronounced industrialization characteristics, are considered a feasible solution to the aforementioned problems of composite slabs. However, the key to achieving overall load-bearing capacity in fully prefabricated floor slabs lies in the connection structure between the slab joints, which has always been a technical bottleneck restricting its widespread application.

[0004] Therefore, developing a reliable and easy-to-construct integrated joint structure for prefabricated floor slabs is crucial for promoting the widespread application of prefabricated floor slabs and will also lay a solid technical foundation for the high-quality development of prefabricated concrete building technology. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a distributed connection precast floor slab based on a UHPC-anchored steel reinforcement bridging framework. Its core technology is the use of a UHPC-anchored steel reinforcement bridging framework, thereby achieving efficient construction, reliable connection, and superior overall performance of the precast floor slab.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a distributed connection precast floor slab based on a UHPC anchored steel reinforcement bridging skeleton, comprising: a precast floor slab body; a steel reinforcement bridging skeleton for connecting two precast floor slab bodies; and ultra-high performance concrete, wherein the steel reinforcement bridging skeleton is fixed to the precast floor slab body by the ultra-high performance concrete; wherein, a distributed connection groove is provided on the precast floor slab body, and ultra-high performance concrete is poured into the distributed connection groove, anchoring the steel reinforcement bridging skeleton inside the distributed connection groove.

[0007] Furthermore, the precast floor slabs are reinforced with ordinary steel bars arranged horizontally and vertically.

[0008] Furthermore, the precast floor slab itself also contains reinforcing bars to be connected, with each distributed connection groove corresponding to a reinforcing bar to be connected.

[0009] Furthermore, one end of the reinforcing bar to be connected is located inside the distributed connection groove, and the portion of the reinforcing bar to be connected located inside the distributed connection groove passes through the reinforcing bar bridging skeleton.

[0010] Furthermore, the ends of the reinforcing bars to be connected can be upsetting or anchored with anchor plates.

[0011] Furthermore, the steel reinforcement bridging cage includes: vertical bars, which are multiple in number and arranged in parallel and at intervals; and side bars, which are arranged inside the vertical bars, with each steel bar to be connected corresponding to two side bars.

[0012] Furthermore, the reinforcing bars to be connected are located between the corresponding two bracing bars.

[0013] Furthermore, the vertical ribs adopt a U-shaped or arc-shaped form.

[0014] Furthermore, ordinary steel bars are designed with a double layer.

[0015] Furthermore, each distributed connection groove corresponds to two reinforcing bars to be connected, and the two reinforcing bars to be connected corresponding to each distributed connection groove are set in a one-to-one correspondence with the double-layer ordinary reinforcing bars.

[0016] The beneficial effects of the present invention are as follows.

[0017] 1. This invention utilizes ultra-high performance concrete (UHPC) poured into the interior of distributed connection grooves and anchors the steel reinforcement bridging skeleton inside the distributed connection grooves. By fully utilizing the high performance of UHPC and its good anchoring performance with the steel reinforcement bridging skeleton, continuous force transmission between the steel reinforcement in the joints of fully precast floor slabs is reliably achieved.

[0018] 2. The steel reinforcement bridging cage has a simple structure, can be flexibly designed, is easy to manufacture, and can be installed quickly, thus improving on-site construction efficiency.

[0019] 3. The distributed connection design can minimize the number of connections, thereby reducing material usage and controlling connection costs.

[0020] 4. The use of a groove design eliminates the need for a bottom formwork for post-cast UHPC at the joints, thereby reducing on-site construction measures, improving work efficiency and controlling costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of the fully prefabricated floor slab body of the present invention.

[0023] Figure 2 This is a structural schematic diagram of the steel reinforcement bridging skeleton of the present invention.

[0024] Figure 3 This is a schematic diagram of the integral joint connection of the fully prefabricated floor slab body according to the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Fully precast floor slab body; 1.1. Distributed connection groove; 1.2. Ordinary steel bars; 1.3. Steel bars to be connected; 2. Steel bridging skeleton; 2.1. Butt reinforcement bars; 2.2. Vertical reinforcement bars; 3. Ultra-high performance concrete. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1 Please see Figures 1 to 3 The present invention provides a distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton, including a precast floor slab body 1, a steel reinforcement bridging skeleton 2 and ultra-high performance concrete 3 (hereinafter referred to as UHPC); the steel reinforcement bridging skeleton 2 is used to connect two adjacent precast floor slab bodies 1, and the steel reinforcement bridging skeleton 2 is fixed to the precast floor slab body 1 by the ultra-high performance concrete 3.

[0028] The main body of the precast floor slab 1 is a concrete slab. Distributed connection grooves 1.1 are provided on the precast floor slab 1. The distributed connection grooves 1.1 are distributed along the adjacent boundaries of the adjacent precast floor slab 1. The spacing and planar dimensions of the arrangement can be flexibly designed according to the stress requirements. The planar shape of the distributed connection grooves 1.1 can be quadrilateral or polygonal.

[0029] The precast floor slab body 1 contains ordinary steel bars 1.2 and steel bars 1.3 to be connected. Each distributed connection groove 1.1 corresponds to a steel bar 1.3 to be connected. Ultra-high performance concrete 3 is poured into the interior of the distributed connection groove 1.1 and the steel bar bridging skeleton 2 is anchored inside the distributed connection groove 1.1.

[0030] Ordinary steel bars 1.2 are arranged in a crisscross pattern, both horizontally and vertically, and feature a conventional double-layer, bidirectional design, i.e. Figure 1 As shown; each distributed connection groove 1.1 corresponds to two steel bars 1.3 to be connected, and the two steel bars 1.3 to be connected corresponding to each distributed connection groove 1.1 are set in a one-to-one correspondence with the two layers of ordinary steel bars 1.2, that is, their positions correspond; in addition, the diameter of the steel bar 1.3 to be connected can be appropriately larger than the diameter of the ordinary steel bar 1.2.

[0031] One end of the reinforcing bar 1.3 to be connected is located inside the distributed connection groove 1.1, and the part of the reinforcing bar 1.3 to be connected corresponding to the distributed connection groove 1.1 passes through the reinforcing bar bridging skeleton 2; the reinforcing bar 1.3 to be connected is exposed in the distributed connection groove 1.1, and the end of the reinforcing bar 1.3 to be connected can be in the form of an upsetting head or a fixed anchor plate.

[0032] In this embodiment, ultra-high performance concrete 3 is poured into the interior of the distributed connection grooves 1.1, and the steel reinforcement bridging skeleton 2 is anchored inside the two corresponding distributed connection grooves 1.1 of the two adjacent fully precast floor slab bodies 1. By making full use of the high performance of UHPC and its good anchoring performance with the steel reinforcement bridging skeleton 2, the continuous force transmission of the steel reinforcement 1.3 to be connected between the joints is reliably realized. At the same time, the distributed connection design can minimize the number of connections, thereby reducing material consumption and controlling connection costs. In addition, the groove formwork eliminates the need for post-cast UHPC bottom formwork at the joint, thereby reducing on-site construction measures, which is conducive to improving work efficiency and controlling costs.

[0033] Example 2 See again Figures 1 to 3 Based on Embodiment 1, the steel reinforcement bridging cage 2 includes vertical bars 2.2, which are multiple in number and arranged in parallel and at intervals. The steel reinforcement bridging cage 2 also includes side bars 2.1, which are arranged inside the vertical bars 2.2. Each steel bar 1.3 to be connected corresponds to two side bars 2.1.

[0034] The vertical ribs 2.2 can be U-shaped, semi-circular, non-semi-circular arc-shaped, or other irregular shapes, etc.

[0035] Both reinforcing bars 2.1 are set inside the vertical bars 2.2. The reinforcing bars 2.1 are fixed to the vertical bars 2.2 by electric welding. In addition, the two reinforcing bars 2.1 corresponding to each reinforcing bar 1.3 to be connected are also set in a corresponding position. The reinforcing bar 1.3 to be connected is located between the two reinforcing bars 2.1 corresponding to the position. Specifically, the part of the reinforcing bar 1.3 to be connected located inside the distributed connection groove 1.1 is between the two corresponding reinforcing bars 2.1.

[0036] In this embodiment, the steel reinforcement bridging cage 2 is formed by combining vertical bars 2.2 and side bars 2.1. The steel reinforcement bridging cage 2 can be flexibly designed, is simple to manufacture, and is quick to install, which helps to improve the on-site construction efficiency.

[0037] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A distributed connection precast floor slab based on a UHPC anchored steel reinforcement bridging frame, characterized in that, include: Fully prefabricated floor slab body (1); Reinforcing steel bridging frame (2) is used to connect two fully precast floor slab bodies (1). Ultra-high performance concrete (3) and steel reinforcement bridging skeleton (2) are fixed to the precast floor slab body (1) by ultra-high performance concrete (3); Among them, the precast floor slab body (1) is provided with a distributed connection groove (1.1), ultra-high performance concrete (3) is poured into the distributed connection groove (1.1), and the steel reinforcement bridging skeleton (2) is anchored in the distributed connection groove (1.1).

2. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 1, characterized in that, The precast floor slab body (1) contains ordinary steel bars (1.2) arranged horizontally and vertically.

3. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 2, characterized in that, The precast floor slab body (1) also contains steel bars (1.3) to be connected, and each distributed connection groove (1.1) corresponds to a steel bar (1.3) to be connected.

4. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 3, characterized in that, One end of the reinforcing bar (1.3) to be connected is located inside the distributed connection groove (1.1), and the part of the reinforcing bar (1.3) to be connected located inside the distributed connection groove (1.1) passes through the reinforcing bar bridging skeleton (2).

5. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 3, characterized in that, The ends of the reinforcing bars to be connected (1.3) can be upsetting or anchor plates can be installed.

6. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 3, characterized in that, The reinforced concrete bridging cage (2) includes: Vertical reinforcement (2.2), there are multiple vertical reinforcements (2.2), and the multiple vertical reinforcements (2.2) are arranged in parallel and at intervals; The reinforcement bars (2.1) are placed inside the vertical bars (2.2). Each bar (1.3) to be connected corresponds to two reinforcement bars (2.1).

7. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 6, characterized in that, The reinforcing bar to be connected (1.3) is located between the two corresponding bracing bars (2.1).

8. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 6, characterized in that, The vertical ribs (2.2) adopt a U-shaped or arc-shaped shape.

9. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 6, characterized in that, Ordinary steel bars (1.2) adopt a double-layer design.

10. The distributed connection precast floor slab based on UHPC anchored steel reinforcement bridging skeleton as described in claim 9, characterized in that, There are two steel bars (1.3) to be connected corresponding to a distributed connection groove (1.1), and the two steel bars (1.3) to be connected corresponding to each distributed connection groove (1.1) are set in a one-to-one correspondence with the double-layer ordinary steel bars (1.2).

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