High-strength and high-sealing reinforced concrete drainage pipe, manufacturing method and formula

Abstract

The invention relates to the technical field of drainage pipes, in particular to a high-strength and high-sealing reinforced concrete drainage pipe, a manufacturing method and a formula. Comprising a concrete body, reinforcing steel bars and butt joint steel rings. The concrete main body is in a hollow tubular shape; the concrete main body covers the steel bars; the butt joint steel ring is arranged at the end part of the concrete main body; the butt joint steel ring protrudes out of the concrete main body; and the butt-joint steel ring is attached to the reinforcing steel bar. In the prior art, a connector on a drainage pipe is also a concrete connector, although the materials are kept consistent, leakage is easily caused at the connector of the drainage pipe under the influence of the physical characteristics of the materials, and the problem that leakage is easily caused on the whole drainage pipe is solved. Compared with the prior art, compared with a concrete connector, the steel structure is more stable and not prone to deformation, and therefore the problem of leakage of the whole drainage pipeline caused by leakage is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of drainage pipe technology, and in particular to a high-strength, high-sealing reinforced concrete drainage pipe, its manufacturing method, and its formula. Background Technology

[0002] Reinforced concrete drainage pipes are prefabricated pipes made of reinforced steel and concrete, widely used in urban drainage, road culverts, and other projects. The steel reinforcement enhances their compressive and bending strength, while the concrete structure provides excellent corrosion resistance and durability, resulting in a service life of over 50 years. Compared to other pipe materials, they offer advantages such as economic cost and ease of maintenance, but their greater weight necessitates mechanical lifting. As a crucial component of municipal infrastructure, they play a vital role in drainage and flood control.

[0003] Typically, a drainage pipe is made up of multiple reinforced concrete drainage pipes (hereinafter referred to as drainage pipes) joined end to end. The joints on the drainage pipes are also made of concrete. Although the material is consistent, due to the physical properties of the material itself, the joints of the drainage pipes are prone to leakage, which leads to the drainage pipe as a whole being prone to leakage problems. Summary of the Invention

[0004] To address the technical problems of existing technologies, this invention provides a high-strength, high-sealing reinforced concrete drainage pipe and its manufacturing method.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A high-strength, high-sealing reinforced concrete drainage pipe includes: a concrete body, reinforcing bars, and a butt-joint steel ring; the concrete body is a hollow tube; the concrete body is covered with reinforcing bars; the butt-joint steel ring is located at the end of the concrete body; the butt-joint steel ring protrudes from the concrete body; and the butt-joint steel ring is in contact with the reinforcing bars.

[0006] Furthermore, the reinforcing bars include inner reinforcing bars and outer reinforcing bars; the inner reinforcing bars correspond to the inner wall of the concrete structure; the outer reinforcing bars correspond to the outer wall of the concrete structure; and the inner and outer reinforcing bars are spaced apart.

[0007] Furthermore, the reinforcing bars also include lapped structural bars; the lapped structural bars are placed between the inner layer of reinforcing bars and the outer layer of reinforcing bars; one side of the lapped structural bar is connected to the inner layer of reinforcing bars; the other side of the lapped structural bar is connected to the outer layer of reinforcing bars; there are multiple lapped structural bars; the lapped structural bars are arranged from one end of the concrete body to the other end.

[0008] A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe, comprising the following steps: a reinforcing cage welding step: welding reinforcing bars to butt-joint steel rings to obtain a reinforcing cage; a molding step: placing the reinforcing cage into a mold, filling it with concrete, and compacting it with vertical vibration to obtain a complete structure; a curing step: using saturated steam to perform gradient heating curing on the complete structure, with the temperature controlled at 60±5℃ during the constant temperature stage; and a demolding step: when the concrete strength reaches more than 70% of the design strength, separating the mold from the complete structure using a hydraulic jacking device to obtain the finished drainage pipe.

[0009] Furthermore, the "reinforcing cage welding steps" also include the following steps: welding the inner layer of reinforcing bars at a spacing of 100±5mm using an automatic welding machine; welding the outer layer of reinforcing bars at a spacing of 80±5mm using an automatic welding machine; placing the outer layer of reinforcing bars outside the inner layer of reinforcing bars using positioning clamps; placing the lapped structural bars at a 45° angle between the inner and outer layer of reinforcing bars, with a spacing of 300mm in a quincunx pattern; welding the lapped structural bars, inner layer of reinforcing bars, and outer layer of reinforcing bars; and assembling the socket steel ring and spigot steel ring.

[0010] Furthermore, the “forming step” also includes the following steps: hoisting the steel cage into the mold so that the steel cage is centered in the mold; pouring and vibrating compacted concrete, with the vibration acceleration gradually increasing from 2g to 8g; and scraping off the excess concrete after the concrete has been poured to the top of the mold.

[0011] Furthermore, "pouring and vibrating to compact concrete" also includes the following steps: pouring concrete layer by layer, with a single layer thickness of 30-50cm; and vibrating to compact the concrete according to the height range of the concrete.

[0012] Furthermore, when the concrete is in the high slump zone, the vibration frequency is 2.5-3.5Hz, and the acceleration is maintained at 2-3g; when the concrete is in the transition zone, the vibration frequency is 12.5-14.5Hz, and the acceleration is maintained at 4-6g; when the concrete is in the near-liquid zone, the vibration frequency is 25-28Hz, and the acceleration is maintained at 7-8g; the vibration duration ratio of the high slump zone, the transition zone, and the near-liquid zone is 1:0.8:0.6, and the total vibration time is less than 120 seconds.

[0013] A formula for a high-strength, high-sealing reinforced concrete drainage pipe, used to manufacture the aforementioned high-strength, high-sealing reinforced concrete drainage pipe, includes: cementitious materials, aggregate system, chemical additives, and water; the amount of cementitious materials is 480-500 kg / m³. 3 The aggregate system dosage is 1750-1780 kg / m³. 3 The dosage of chemical additives is 8.5-10.5 kg / m³. 3 The water usage is 135-140 kg / m³.3 .

[0014] Furthermore, the cementitious material includes P·O 52.5 cement at a dosage of 380-400 kg / m³. 3 The dosage of Class I fly ash is 60-70 kg / m³. 3 The amount of silica fume used is 30-40 kg / m³ 3 The aggregate system includes manufactured sand at a dosage of 750-780 kg / m³. 3 The amount of granite crushed stone used is 1000-1020 kg / m³. 3 Chemical additives, including polycarboxylate superplasticizer, are used at a dosage of 7.0-8.0 kg / m³. 3 The dosage of retarding synergist is 1.5-2.5 kg / m³. 3 . Attached Figure Description

[0015] Figure 1 Overall structure diagram.

[0016] Figure 2 Diagram showing the connection between the spigot steel ring and the socket steel ring.

[0017] Figure 3 Diagram of the steel ring structure at the insertion port.

[0018] Figure 4 Overall flowchart.

[0019] Figure 5 : Schematic diagram of the second docking of the spigot steel ring and the socket steel ring.

[0020] In the diagram: 1. Concrete main body; 2. Reinforcing bars; 21. Inner layer reinforcing bars; 211. Inner layer longitudinal bars; 212. Inner layer ring bars; 22. Outer layer reinforcing bars; 221. Outer layer longitudinal bars; 222. Outer layer ring bars; 23. Lap joint structural bars; 3. Butt joint steel ring; 31. Socket steel ring; 32. Spigot steel ring; 321. Receiving groove. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] Example 1: A high-strength, high-sealing reinforced concrete drainage pipe includes: a concrete body 1, reinforcing bars 2, and butt-joint steel rings 3. The concrete body 1 is a hollow tube. The concrete body 1 covers the reinforcing bars 2. The butt-joint steel rings 3 are located at the ends of the concrete body 1. The butt-joint steel rings 3 protrude from the concrete body 1. The butt-joint steel rings 3 are in contact with the reinforcing bars 2.

[0023] Specifically, the reinforcing bars 2 include inner layer reinforcing bars 21, outer layer reinforcing bars 22, and lapped structural bars 23. The inner layer reinforcing bars 21 correspond to the inner wall of the concrete main body 1. The outer layer reinforcing bars 22 correspond to the outer wall of the concrete main body 1. The inner layer reinforcing bars 21 and outer layer reinforcing bars 22 are spaced apart. The inner layer reinforcing bars 21 include inner longitudinal bars 211 and inner ring bars 212. The inner longitudinal bars 211 correspond to the inner wall of the concrete main body 1 and extend from one end of the concrete main body 1 to the other. The inner ring bars 212 are arranged from one end of the inner longitudinal bars 211 to the other. The inner ring bars 212 are connected to the inner longitudinal bars 211. The outer layer reinforcing bars 22 include outer longitudinal bars 221 and outer ring bars 222. The outer longitudinal bars 221 correspond to the inner wall of the concrete main body 1 and extend from one end of the concrete main body 1 to the other. The outer ring reinforcement 222 extends from one end of the outer longitudinal reinforcement 221 to the other. The outer ring reinforcement 222 is connected to the outer longitudinal reinforcement 221. Lap reinforcement 23 is placed between the inner reinforcement 21 and the outer reinforcement 22. One side of the lap reinforcement 23 is connected to the inner reinforcement 21. The other side of the lap reinforcement 23 is connected to the outer reinforcement 22. There are multiple lap reinforcement 23s. The lap reinforcement 23 extends from one end of the concrete main body 1 to the other.

[0024] The butt joint steel ring 3 includes a socket steel ring 31 and a spigot steel ring 32. The socket steel ring 31 and the spigot steel ring 32 are respectively disposed at both ends of the concrete main body 1. The socket steel ring 31 and the spigot steel ring 32 are fitted together with the reinforcing bars 2. The socket steel ring 31 and the spigot steel ring 32 correspond to each other for interlocking. A receiving groove 321 is provided on the spigot steel ring 32. The receiving groove 321 is used to accommodate a rubber ring. When the socket steel ring 31 and the spigot steel ring 32 are interlocked, the rubber ring fits against the socket steel ring 31. Preferably, two receiving grooves 321 are provided on the spigot steel ring 32, and a test pressure groove is provided between the two receiving grooves 321. See attached figure for details. Figure 5 As shown.

[0025] In practical applications, two drain pipes are positioned end-to-end, with the spigot steel ring 32 of one pipe inserted into the socket steel ring 31 of the other. Once the spigot steel ring 32 is inserted, the rubber ring on the spigot steel ring 32 will fit snugly against the inner wall of the socket steel ring 31. Thus, through the cooperation of the spigot steel ring 32 and the socket steel ring 31, the two drain pipes can be effectively connected. Compared to concrete joints, the steel structure is more stable and less prone to deformation, effectively preventing leakage that could lead to overall leakage in the drainage pipe. Furthermore, the rubber ring further enhances the sealing effect. Simultaneously, the aforementioned structural combination effectively strengthens the structure, allowing the length of this drain pipe to be extended from the existing 2-3 meters to 5-6 meters. When constructing drainage pipes of the same length, fewer of these drain pipes are used, effectively reducing the number of joints and further reducing leakage.

[0026] Example 2: A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe, as described in Example 1, includes the following steps: Reinforcing cage welding step: welding reinforcing bars to butt-joint steel rings to obtain a reinforcing cage; Molding step: placing the reinforcing cage into a mold, filling it with concrete, and compacting it with vertical vibration to obtain a complete structure; Curing step: using saturated steam to perform gradient heating curing on the complete structure, with the temperature controlled at 60±5℃ during the constant temperature stage; Demolding step: when the concrete strength reaches more than 70% of the design strength, separating the mold and the complete structure using a hydraulic jacking device to obtain the finished drainage pipe.

[0027] Thus, the drainage pipes obtained through the aforementioned process can be interlocked via the connecting steel rings 3 at their ends, allowing the two drainage pipes to be effectively connected together. Because the steel structure is more stable, compared to concrete joints, it effectively prevents leakage at the interface between the two drainage pipes, thereby avoiding overall leakage in the drainage system.

[0028] Specifically, the "reinforcing cage welding steps" also include the following steps: welding the inner layer of reinforcing bars at a spacing of 100±5mm using an automatic welding machine; welding the outer layer of reinforcing bars at a spacing of 80±5mm using an automatic welding machine; placing the outer layer of reinforcing bars outside the inner layer of reinforcing bars using positioning clamps; placing the lapped structural bars at a 45° angle between the inner and outer layer of reinforcing bars, with a spacing of 300mm in a quincunx pattern; welding the lapped structural bars, inner layer of reinforcing bars, and outer layer of reinforcing bars; and assembling the socket steel ring and spigot steel ring.

[0029] The aforementioned process makes the structure of the inner layer steel bars 21 and the outer layer steel bars 22 more stable. At the same time, it makes the connection between the inner layer steel bars 21 and the outer layer steel bars 22 tighter, laying a solid structural foundation for extending the overall length of the drainage pipe.

[0030] The “forming step” also includes the following steps: hoisting the steel cage into the mold so that the steel cage is centered in the mold; pouring and vibrating the compacted concrete, with the vibration acceleration gradually increasing from 2g to 8g; and scraping off the excess concrete after the concrete has been poured to the top of the mold.

[0031] In practice, the reinforcing cage and formwork are assembled vertically. Then, concrete is poured and vibrated to compact it. The vibration acceleration is gradually increased from 2g to 8g. This gradient in acceleration makes the concrete denser and helps to expel air bubbles, resulting in a more stable structure. This allows the structure to be effectively extended to 5-6 meters in length, which helps reduce the number of drainage pipes needed and the number of joints, thus further reducing leakage problems.

[0032] The process of “pouring and vibrating to compact concrete” also includes the following steps: pouring concrete layer by layer, with a single layer thickness of 30-50cm; and vibrating to compact the concrete according to the height range of the concrete.

[0033] By employing a layered pouring and vibration method, the defoaming efficiency of the concrete can be effectively accelerated. At the same time, it reduces the porosity of the final tank structure.

[0034] Specifically, when the concrete is in the high slump zone, the vibration frequency is 2.5-3.5Hz and the acceleration is maintained at 2-3g; when the concrete is in the transition zone, the vibration frequency is 12.5-14.5Hz and the acceleration is maintained at 4-6g; when the concrete is in the near-liquid zone, the vibration frequency is 25-28Hz and the acceleration is maintained at 7-8g; the vibration duration ratio of the high slump zone, transition zone, and near-liquid zone is 1:0.8:0.6, and the total vibration time is less than 120 seconds.

[0035] Therefore, in the high slump zone, low-frequency vibration can prevent the rapid settling of aggregates from clogging the vibration waves. In the transition zone, medium-frequency vibration can effectively disrupt the cement flocculation structure. In the near-liquid zone, high-frequency vibration can effectively stimulate the micro-movement of fine aggregates to fill the gaps.

[0036] Example 3: This is used to produce a high-strength, high-sealing reinforced concrete drainage pipe as described in Example 1. It comprises: cementitious materials, aggregate system, chemical additives, and water; the amount of cementitious materials is 480-500 kg / m³. 3 The aggregate system dosage is 1750-1780 kg / m³. 3 The dosage of chemical additives is 8.5-10.5 kg / m³. 3 The water usage is 135-140 kg / m³. 3 Specifically, the cementitious material, including P·O 52.5 cement, is used at a rate of 380-400 kg / m³. 3 The dosage of Class I fly ash is 60-70 kg / m³. 3 The amount of silica fume used is 30-40 kg / m³ 3 The aggregate system includes manufactured sand at a dosage of 750-780 kg / m³.3 The amount of granite crushed stone used is 1000-1020 kg / m³. 3 Chemical additives, including polycarboxylate superplasticizer, are used at a dosage of 7.0-8.0 kg / m³. 3 The dosage of retarding synergist is 1.5-2.5 kg / m³. 3 .

[0037] In this mixture, P·O 52.5 cement provides the core strength framework. Grade I fly ash improves workability and reduces heat of hydration. Silica fume enhances impermeability. The aggregate system, in conjunction with the cementitious materials, forms the main concrete structure of the drainage pipe. Furthermore, the combination of polycarboxylate superplasticizer and retarder, along with the aforementioned components, extends the initial setting time by 2-3 hours and ensures the overall fluidity of the material before setting, thus making the mixture suitable for layered casting processes. In summary, by adapting the aforementioned mixture to the processing technology of Example 2, the final product meets practical requirements.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A high-strength, high-sealing reinforced concrete drainage pipe, characterized in that: Includes: concrete main body, reinforcing bars, and butt joint steel rings; The concrete body is hollow and tubular; The concrete body encapsulates the reinforcing steel; The connecting steel ring is disposed at the end of the concrete main body; The connecting steel ring protrudes from the concrete body; The connecting steel ring is in contact with the reinforcing bar.

2. The high-strength, high-sealing reinforced concrete drainage pipe according to claim 1, characterized in that: The reinforcing bars include inner reinforcing bars and outer reinforcing bars; The inner layer of reinforcing bars corresponds to the inner wall of the concrete main body; The outer steel reinforcement corresponds to the outer wall of the concrete main body; The inner layer of reinforcing bars is spaced apart from the outer layer of reinforcing bars.

3. A high-strength, high-sealing reinforced concrete drainage pipe according to claim 2, characterized in that: The reinforcing bars also include lapped structural bars; The lapped structural reinforcement is placed between the inner layer of reinforcement and the outer layer of reinforcement; One side of the lapped structural reinforcement is connected to the inner layer of reinforcement; The other side of the lapped structural reinforcement is connected to the outer layer of reinforcement; The number of lapped structural reinforcement bars is multiple; The lapped structural reinforcement bars are arranged from one end of the concrete body to the other end.

4. A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe, characterized in that: Used for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe as described in any one of claims 1 to 3; Includes the following steps: Welding steps for reinforcing cages: Weld the reinforcing bars to the butt joint steel rings to obtain the reinforcing cage; Molding steps: Place the steel cage into the mold, fill it with concrete and compact it with vertical vibration to obtain the final shape; Curing steps: The adult body is cured by gradient heating with saturated steam, and the temperature is controlled at 60±5℃ during the constant temperature stage; Demolding step: When the concrete strength reaches more than 70% of the design strength, the mold and the finished product are separated by a hydraulic jacking device to obtain the finished drainage pipe.

5. A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe according to claim 4, characterized in that: The "reinforcing cage welding step" also includes the following steps: The inner layer of reinforcing bars was welded using an automatic welding machine at a spacing of 100±5mm. The outer layer of reinforcing bars is welded using an automatic welding machine at a spacing of 80±5mm. The outer layer of reinforcing bars is positioned outside the inner layer of reinforcing bars using a positioning clamp; The lapped structural bars are placed at a 45° angle between the inner and outer layer of steel bars, with a spacing of 300mm and a quincunx pattern. Weld the lapped structural bars, the inner layer of reinforcing bars, and the outer layer of reinforcing bars; Assemble the socket steel ring and the spigot steel ring.

6. The method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe according to claim 4, characterized in that: The "forming step" also includes the following steps: The steel reinforcement cage is hoisted into the mold so that it is centered in the mold. The concrete was poured and vibrated to compact it, with the vibration acceleration gradually increased from 2g to 8g. After the concrete is poured to the top of the mold, the excess concrete is scraped off.

7. A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe according to claim 4, characterized in that: The "pouring and vibrating to compact the concrete" also includes the following steps: The concrete is poured layer by layer, with each layer being 30-50cm thick. The concrete is vibrated and compacted according to its height range.

8. A method for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe according to claim 7, characterized in that: When the concrete is located in the high slump zone, the vibration frequency is 2.5-3.5Hz, and the acceleration is maintained at 2-3g. When the concrete is in the transition zone, the vibration frequency is 12.5-14.5Hz and the acceleration is maintained at 4-6g. When the concrete is in the near-liquid zone, the vibration frequency is 25-28Hz and the acceleration is maintained at 7-8g. The vibration duration ratio of the high collapse zone, the transition zone, and the near-liquid zone is 1:0.8:0.6, and the total vibration time is less than 120 seconds.

9. A formula for a high-strength, high-sealing reinforced concrete drainage pipe, characterized in that: Used for manufacturing a high-strength, high-sealing reinforced concrete drainage pipe as described in any one of claims 1 to 3; Includes cementitious materials, aggregate systems, chemical additives, and water; The amount of the cementitious material used is 480-500 kg / m³. 3 ; The aggregate system is used at a rate of 1750-1780 kg / m³. 3 ; The dosage of the chemical additive is 8.5-10.5 kg / m³. 3 ; The water usage is 135-140 kg / m³. 3 .

10. The formula for a high-strength, high-sealing reinforced concrete drainage pipe according to claim 9, characterized in that: The cementitious material includes P·O 52.5 cement at a dosage of 380-400 kg / m³. 3 The dosage of Class I fly ash is 60-70 kg / m³. 3 The amount of silica fume used is 30-40 kg / m³ 3 ; The aggregate system includes manufactured sand at a dosage of 750-780 kg / m³. 3 The amount of granite crushed stone used is 1000-1020 kg / m³. 3 ; The chemical additives include polycarboxylate superplasticizer at a dosage of 7.0-8.0 kg / m³. 3 The dosage of retarding synergist is 1.5-2.5 kg / m³. 3 .

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