Splicing type recycling method for dismantling building components

Abstract

The invention discloses a splicing type reutilization method for demolition of building components, and aims to realize resource reutilization of demolition of buildings. In the implementation process, concrete at the connecting positions, needing to be dismantled, of the building component is dismantled, so that the stress ribs and the erection ribs are exposed, and the stirrups in the exposed areas are removed to form exposed ribs; the exposed ribs of every two adjacent demolished building components are mutually overlapped and connected to form a fixed node; the fixing joints are sleeved with fastening stirrups, and concrete is poured in the forcible entry area to form structural joints. According to the method, the exposed ribs in the multiple demolition components are connected into different structural components after being lapped in a specific form through the fixed joints, meanwhile, concrete is poured into the fixed joints to form stable construction joints, in the whole process, the lapped steel bars are protected, complete forcible entry of the concrete is avoided, the process cost is saved, and the construction efficiency is improved. And the negative influence on the environment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste resource utilization, and in particular to a splicing and recycling method for dismantled building components. Background Art

[0002] At present, the demolition methods of concrete structures are manual demolition, mechanical demolition and blasting demolition, and the demolition process will cause great environmental pollution. The mainstream resource utilization method of concrete structures is to crush waste concrete blocks into aggregates and then prepare them into recycled concrete. The production and use of recycled concrete can save natural building materials on a large scale and reduce industrial carbon emissions. Its production process still requires a series of operations such as demolition, cleaning, sorting, configuration, mixing and maintenance, and has a certain preparation cost. Recycled aggregates are produced by mechanical crushing, and microcrack damage is inevitable. The mortar attached to the recycled aggregate has the disadvantage of high water absorption. These factors restrict the quality of recycled concrete and limit the scale of application. Therefore, there is a need for a method for resource reuse of demolished buildings that does not require the recycling of recycled concrete, is easy to process, and has low environmental pollution. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a splicing and recycling method for dismantled building components, which can efficiently dispose of building solid waste while reducing the cost of recycling.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A splicing and recycling method for demolished building components comprises: breaking up the concrete at the locations where the demolished building components need to be connected so that the force-bearing bars and the frame bars are exposed, and removing the stirrups in the exposed areas to form exposed bars; the exposed bars of two adjacent demolished building components are overlapped and connected to form fixed nodes; fastening stirrups are sleeved on the fixed nodes, and concrete is poured in the demolished areas to form structural nodes.

[0006] The strength grade of the above-mentioned poured concrete shall not be lower than C40, and the thickness located on the outside of the fixed node shall not be less than the diameter of the exposed reinforcement. The demolition area of ​​the demolished building components shall not be less than the contact area between two adjacent demolished building components. The demolished building components include beams, columns, slabs and shear walls, and the exposed steel bar length of the beam shall not be less than 1.5 times the beam height, and the exposed steel bar length of the column shall not be less than 1 times the column width.

[0007] Preferably, the connection method between the two exposed bars that cooperate with each other includes binding, welding and sleeve connection, and the lap method adopts the standard cast-in-place structural node reinforcement method, including overlapping lap and bending lap. When the column and beam are connected straight, the exposed bars are overlapped; when the column and beam are connected at a flat angle, the exposed bars on the outside of the angle are bent along the outside of the angle and overlapped; when the column and beam are connected vertically or laterally with the slab and shear wall, the exposed bars of the column and beam are extended to the inside of the exposed bars of the slab and shear wall and bent and overlapped.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention utilizes fixed nodes to overlap exposed reinforcements in multiple demolished building components in a specific form and connect them into different structural members, and simultaneously pours concrete on the fixed nodes to form stable structural nodes. The entire process not only protects the overlapped reinforcements, but also avoids complete demolition of the concrete, which not only saves process costs but also reduces negative impacts on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the removal operation of the joints of the dismantling building components;

[0011] Figure 2 It is a schematic diagram of the operation of connecting two beams in a straight line;

[0012] Figure 3 It is a schematic diagram of the indirect operation of the two beam corners;

[0013] Figure 4 It is a schematic diagram of the vertical connection between the column and the slab;

[0014] Figure 5 It is a schematic diagram of the lateral connection between the column and the shear wall;

[0015] Figure 6 It is a schematic diagram of the structure of an artificial fish reef connected by multiple beams;

[0016] Figure 7 It is a schematic diagram of the structure of an artificial fish reef using a plate and multiple beams;

[0017] Figure 8 It is a structural diagram of an artificial wall connected by shear walls, beams and columns.

[0018] Illustration symbols: 1. Dismantling building components, 2. Fixing nodes, 3. Tightening stirrups, 4. Structural nodes, 11. Load-bearing bars, 12. Frame bars, 13. Stirrups, 101. Beams, 102. Columns, 103. Plates, 104. Shear walls. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0020] Example 1

[0021] like Figure 1-5 As shown, a splicing and recycling method for dismantled building components comprises the following steps:

[0022] S1: Demolish the concrete at the joints of the demolished building component 1 to expose the force reinforcement 11 and the frame reinforcement 12, and remove the stirrups 13 in the exposed area to form exposed reinforcement, wherein the demolished building component 1 includes the beam 101, the column 102, the plate 103 and the shear wall 104;

[0023] S2: The exposed reinforcements of two adjacent demolished building components 1 are overlapped and connected to form a fixed node 2. The connection methods between the two mutually matched exposed reinforcements include binding, welding and sleeve connection. The overlap method adopts the reinforcement method of the regular cast-in-place structure node, including overlapping overlap and bending overlap;

[0024] S3: Fastening stirrups 3 are set on the fixed node 2, and concrete is poured in the demolition area to form a structural node 4. The type of poured concrete is not limited to ordinary concrete, recycled concrete and geopolymer concrete, and its strength grade is not less than C40, and the thickness of the concrete on the outside of the fixed node 2 is not less than the exposed reinforcement diameter.

[0025] Fixed nodes 2 are used to overlap exposed reinforcements in multiple demolished building components 1 in a specific form and then connected into different structural members, and concrete is poured into the fixed nodes 2 at the same time to form stable structural nodes 4. The whole process not only protects the overlapped reinforcements, but also avoids complete demolition of the concrete, which not only saves process costs but also reduces negative impacts on the environment.

[0026] As a preferred solution of the above embodiment, the demolition area of ​​the demolished building components 1 is not less than the contact area between two adjacent demolished building components 1, the exposed steel bar length of the beam 101 is not less than 1.5 times the beam height, and the exposed steel bar length of the column 102 is not less than 1 times the column width.

[0027] like Figure 2 As shown, when the column 102 and the beam 101 are connected in a straight line, the exposed reinforcement overlaps and overlaps; Figure 3 As shown, when the column 102 and the beam 101 are connected at a flat angle, the exposed reinforcement on the outside of the angle is bent along the outside of the angle and then overlapped;

[0028] When the column 102 and the beam 101 are vertically or laterally connected to the plate 103 and the shear wall 104 , the exposed reinforcement of the column 102 and the beam 101 are extended to the inner side of the exposed reinforcement of the plate 103 and the shear wall 104 and bent and overlapped.

[0029] Application Examples

[0030] Based on the above embodiments, this application example discloses a practical application case of the splicing and reuse method for dismantled building components, which is as follows:

[0031] 1. If Figure 6 The structure of the artificial reef shown is formed by dismantling the beams 101 of the building components 1 and splicing them through the structural nodes 4. When placed in the ocean current, it has a good flow field effect and can generate a back vortex, which is easy for fish to gather and avoid enemies, and has a positive effect on increasing fishery production.

[0032] 2. If Figure 7 The structure of the artificial reef shown is composed of a plate 103 and a beam 101 of a dismantled building component 1, which are combined through a structural node 4. The application of the plate 103 helps to form an upwelling, accelerate seawater convection, and increase the rate of nutrient replacement. On the one hand, it has a positive effect on fishery breeding, and on the other hand, it helps to aggregate marine microorganisms, and has a positive effect on improving the seabed ecology and restoring the biological community.

[0033] 3. If Figure 8 The structure of the artificial fence shown is composed of columns 102, beams 101, and shear walls 104 of the dismantled building components 1 connected through structural nodes 4. Since the internal reinforcement is tightly connected, the wall is highly strong, has good wind and lodging resistance, and has a high safety factor. In specific implementation, the shear wall 103 can be replaced by a plate 103 of the dismantled building component 1.

[0034] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for splicing and reusing dismantled building components, characterized in that: The steps include: S1: breaking up the concrete at the joints where the building components (1) need to be dismantled to expose the force-bearing bars (11) and the frame bars (12), and removing the stirrups (13) in the exposed areas to form exposed bars; S2: The exposed reinforcements of two adjacent demolished building components (1) are overlapped and connected to each other to form a fixed node (2); S3: A fastening stirrup (3) is sleeved on the fixed node (2), and concrete is poured in the demolition area to form a structural node (4).

2. The splicing and recycling method for dismantled building components according to claim 1, characterized in that: The demolition area of ​​the demolished building components (1) is not less than the contact area between two adjacent demolished building components (1).

3. The splicing and recycling method for dismantled building components according to claim 2, characterized in that: The demolished building component (1) comprises a beam (101), a column (102), a plate (103) and a shear wall (104), and the exposed steel bar length of the beam (101) is not less than 1.5 times the beam height, and the exposed steel bar length of the column (102) is not less than 1 times the column width.

4. The splicing and recycling method for dismantled building components according to claim 3, characterized in that: The connection methods between the two exposed reinforcements that cooperate with each other include binding, welding and sleeve connection, and the lap joint method adopts the standard cast-in-place structure node reinforcement method, including overlapping lap joint and bending lap joint.

5. The splicing and recycling method for dismantled building components according to claim 4, characterized in that: When the column (102) and the beam (101) are connected in a straight line, the exposed reinforcements overlap and overlap; When the column (102) and the beam (101) are connected by flat folding, the exposed reinforcement on the outside of the corner is bent along the outside of the folding and then overlapped.

6. The splicing and recycling method for dismantled building components according to claim 4, characterized in that: When the column (102) and the beam (101) are vertically connected or laterally connected to the plate (103) and the shear wall (104), the exposed reinforcement of the column (102) and the beam (101) are extended to the inner side of the exposed reinforcement of the plate (103) and the shear wall (104) and are bent and overlapped.

7. The splicing and recycling method for dismantled building components according to any one of claims 1 to 6, characterized in that: The strength grade of the poured concrete is not less than C40, and the thickness outside the fixed node (2) is not less than the diameter of the exposed reinforcement.

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