Beam body flange plate concrete stripping and rib reserving method

Abstract

The invention provides a beam body flange plate concrete stripping and rib reserving method. The beam body flange plate concrete stripping and rib reserving method comprises the following steps that S1, a construction joint is cut off along the upper portion and the lower portion of a flange plate through a cutting machine; s2, the construction joint is filled with a thin steel plate; and S3, holes are gradually punched outwards along the construction joint, an expanding agent is poured into the holes, and then the beam slab concrete is integrally expanded and broken after the expanding agent expands, so that the purposes of stripping the concrete and reserving the steel bars are achieved. The beam body flange plate concrete stripping and rib reserving method has the advantages that cracks of the beam plate can be reduced, and dust and noise pollution can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of beam flange slab concrete stripping and reinforcement retention, and in particular relates to a beam flange slab concrete stripping and reinforcement retention method. Background Art

[0002] At present, in the process of widening urban bridges, it is necessary to chisel out the concrete of the flange plate of the old bridge, peel off the steel bars of the flange plate of the beam body, connect them with the exposed flange plate steel bars of the newly built beam and slab, and then pour concrete as a whole.

[0003] The general flange plate construction method is to use manual pneumatic picks to directly drill and break. Manual breaking can easily cause cracks in other parts of the beam and slab, making it impossible to guarantee the quality of the entire beam body, and it also creates a lot of dust and noise.

[0004] Therefore, it is necessary to provide a new beam flange slab concrete stripping and reinforcement retention method to solve the above technical problems. Summary of the invention

[0005] The technical problem solved by the invention is to provide a beam body flange slab concrete stripping and reinforcement retaining method which can ensure that cracks of beam slabs are reduced and dust and noise pollution are reduced.

[0006] In order to solve the above technical problems, the present invention provides a beam flange plate concrete stripping and reinforcement retaining method comprising the following steps: S1. using a cutting machine to cut a construction joint up and down along the flange plate;

[0007] S2. Fill the construction joint with a thin steel plate;

[0008] S3. Drill holes gradually outward along the construction joint, and pour expansion agent into the holes, then wait for the expansion agent to expand and break the entire beam and slab concrete, so as to achieve the purpose of concrete stripping and retaining the reinforcement.

[0009] As a further solution of the present invention, the step S1 further includes the following:

[0010] (1) Before cutting, standard marking is required;

[0011] (2) Before cutting, the cutting area needs to be cleaned to remove loose stones and dust;

[0012] (3) After cutting, clean it with water and then use a brush to clean it to remove any loose stones.

[0013] As a further solution of the present invention, the width of the construction joint is 5 cm, and the width of the thin steel plate is 3 cm.

[0014] As a further solution of the present invention, step S3 further includes the following:

[0015] (1). The diameter of the hole is 5cm;

[0016] (2) Before injecting the expansion agent, the hole must be cleaned in advance;

[0017] (3) After cleaning, pour in the expansion agent, then seal the hole and wait for the expansion agent to expand.

[0018] As a further solution of the present invention, the expansion agent is prepared from cement, fly ash, aggregate, magnesite, admixture and water.

[0019] As a further solution of the present invention, the aggregate includes fine aggregate, the fine aggregate is coarse river sand, and the fineness modulus of the fine aggregate is 2.

[0020] As a further solution of the present invention, the aggregate further includes coarse aggregate, the coarse aggregate is basalt crushed stone, and the particle size of the basalt is 5 to 10 mm.

[0021] As a further solution of the present invention, the admixture is a high-efficiency water reducer.

[0022] As a further solution of the present invention, the magnesite accounts for 5% of the total amount, and the water-cement ratio is fixed at 0.3.

[0023] As a further solution of the present invention, the additive accounts for 0.5% of the total amount.

[0024] Compared with the related art, the beam flange slab concrete stripping and reinforcement retaining method provided by the present invention has the following beneficial effects:

[0025] 1. The present invention can ensure that cracks in beams and slabs are reduced, and dust and noise pollution are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0028] Please refer to Figure 1 ,in, Figure 1 The method for stripping concrete and retaining reinforcement of beam flange slab comprises the following steps:

[0029] S1. Use a cutting machine to cut a construction joint up and down along the flange plate;

[0030] S2. Fill the construction joint with a thin steel plate;

[0031] S3. Drill holes gradually outward along the construction joint, and pour expansion agent into the holes, then wait for the expansion agent to expand and break the entire beam and slab concrete, so as to achieve the purpose of concrete stripping and retaining the reinforcement.

[0032] The step S1 also includes the following:

[0033] (1) Before cutting, standard marking is required;

[0034] (2) Before cutting, the cutting area needs to be cleaned to remove loose stones and dust;

[0035] (3) After cutting, clean it with water and then use a brush to clean it to remove any loose stones.

[0036] The width of the construction joint is 5 cm, and the width of the thin steel plate is 3 cm.

[0037] The step S3 also includes the following:

[0038] (1). The diameter of the hole is 5cm;

[0039] (2) Before injecting the expansion agent, the hole must be cleaned in advance;

[0040] (3) After cleaning, pour in the expansion agent, then seal the hole and wait for the expansion agent to expand.

[0041] The expansion agent is prepared from cement, fly ash, aggregate, magnesite, admixture and water.

[0042] The aggregate includes fine aggregate, the fine aggregate is coarse river sand, and the fineness modulus of the fine aggregate is 2.

[0043] The aggregate also includes coarse aggregate, which is made of basalt crushed stone, and the particle size of the basalt is 5-10 mm.

[0044] The admixture is a high-efficiency water reducing agent.

[0045] The magnesite is 5% of the total amount, and the water-cement ratio is fixed at 0.3.

[0046] The amount of the additive is 0.5% of the total amount.

[0047] The invention can ensure that cracks in beams and slabs are reduced and dust and noise pollution are reduced.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for stripping concrete and retaining reinforcement in a beam flange slab, characterized in that: The following steps are involved: S1. Use a cutting machine to cut a construction joint up and down along the flange plate; S2. Fill the construction joint with a thin steel plate; S3. Drill holes gradually outward along the construction joint, and pour expansion agent into the holes, then wait for the expansion agent to expand and break the entire beam and slab concrete, so as to achieve the purpose of concrete stripping and retaining the reinforcement.

2. The beam flange slab concrete stripping and reinforcement retaining method according to claim 1 is characterized in that: The step S1 also includes the following: (1) Before cutting, the standard needs to be marked in advance; (2) Before cutting, the cutting area needs to be cleaned to remove loose stones and dust; (3) After cutting, clean it with water and then use a brush to clean it to remove any loose stones.

3. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The width of the construction joint is 5 cm, and the width of the thin steel plate is 3 cm.

4. The beam flange slab concrete stripping and reinforcement retaining method according to claim 1, characterized in that: The step S3 also includes the following: (1). The diameter of the hole is 5cm; (2) Before injecting the expansion agent, the hole must be cleaned in advance; (3) After cleaning, pour in the expansion agent, then seal the hole and wait for the expansion agent to expand.

5. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The expansion agent is prepared from cement, fly ash, aggregate, magnesite, admixture and water.

6. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The aggregate includes fine aggregate, the fine aggregate is coarse river sand, and the fineness modulus of the fine aggregate is 2.

7. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The aggregate also includes coarse aggregate, which is made of basalt crushed stone, and the particle size of the basalt is 5-10 mm.

8. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The admixture is a high-efficiency water reducing agent.

9. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The magnesite is 5% of the total amount, and the water-cement ratio is fixed at 0.

3.

10. The method for stripping concrete and retaining reinforcement of beam flange slab according to claim 1, characterized in that: The amount of the additive is 0.5% of the total amount.

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