CN217381990U

CN217381990U - Reinforced concrete pipe with special structure

Info

Publication number: CN217381990U
Application number: CN202121372831.3U
Authority: CN
Inventors: 覃柯
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-09-06
Anticipated expiration: 2031-06-21

Abstract

The utility model relates to a reinforced concrete pipe of special construction. Including concrete and steel reinforcement framework, steel reinforcement framework includes that a plurality of are parallel to each other and the reinforcing bar ring of arranging along the hollow shaft direction, and the reinforcing bar ring is including outer ring muscle and the inner ring muscle of arranging with one heart, has fixed connection's brace rod between outer ring muscle and the inner ring muscle. The reinforcing rings are fixedly connected by a plurality of inner longitudinal bars or outer longitudinal bars. Compared with the prior art, the external pressure load standard of the pipe body can be achieved by changing the structure of the steel reinforcement framework and using less steel. The cost is saved, and the market competitiveness of the product is improved.

Description

Reinforced concrete pipe with special structure

Technical Field

The utility model relates to a building materials trade concrete products field specifically is a special construction's reinforced concrete pipe.

Background

The reinforced concrete pipe is a concrete product part suitable for gravity flow pipelines of rainwater, sewage, water diversion, farmland irrigation and drainage and the like. The production process is various, the product has corresponding national standards, and the main control technical indexes are crack load and damage load. At present, a reinforcement framework structure in the production of reinforced concrete pipes is subjected to reinforcement calculation according to GB50010 concrete design Specification, GB50332 water supply and drainage engineering pipeline structure design Specification and CECS143 buried precast concrete circular pipe pipeline structure design Specification in water supply and drainage engineering, and a special framework seam welder is adopted to apply resistance pressure to spirally wind circumferential reinforcements and longitudinal reinforcements to weld the longitudinal reinforcements to form a cage. According to the design requirements of the specification regulations, a single-layer reinforcement cage is adopted for the reinforced concrete pipe with small caliber and low grade, and an inner layer or an outer layer or multiple layers of reinforcement cages are required to be arranged along the wall thickness no matter the grade is high or low for the reinforced concrete pipe with large caliber.

The pipe product produced by the steel bar structure calculated and configured according to the design principle can basically reach the standard of external pressure load for the reinforced concrete pipe with small caliber and low grade, and the reinforced concrete pipe with medium and large caliber can hardly reach the standard requirement when the external pressure load detection is carried out according to the national standard. The reason is that when the pipe is produced and formed, each layer of reinforcement cage in the framework structure basically has no tie in the pipe wall, or only meets the interlayer positioning requirement even if the tie exists. Therefore, each layer of steel bars is only formed into a whole by the hardened concrete of the wall thickness of the pipe body. The structure leads the strength of the steel bar of the pipe body not to be fully exerted when the pipe body bears radial load, so that the bending moment of the pipe body is insufficient under the action of the radial load, and the pipe body is easy to deform and crack. If the existing reinforcement structure needs to meet the requirement of external pressure load, the amount of the steel bars needs to be increased more than that of the steel bars designed and calculated, so that the cost of the reinforced concrete pipe is increased, and the market competitiveness is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses just for solving shortcoming among the prior art, improve reinforced concrete pipe strength, reduce the reinforcing bar quantity, reduce reinforced concrete pipe manufacturing cost, improve market competition.

In order to realize the purpose, the utility model discloses take following technical scheme:

the utility model provides a reinforced concrete pipe of special construction, includes concrete and framework of steel reinforcement, its characterized in that: the steel bar framework comprises a plurality of steel bar rings which are parallel to each other and are arranged along the pipe shaft direction, each steel bar ring comprises an outer ring rib (1) and an inner ring rib (3) which are concentrically arranged, and a support rib (2) which is fixedly connected with the outer ring rib (1) and the inner ring rib (3), and the support rib (2) is distributed between the outer ring rib (1) and the inner ring rib (3).

Further, the support bars (2) are arranged along the radial direction of the reinforcing steel bar ring.

Furthermore, the reinforcing ring also comprises an outer protective layer limiting rib (21) protruding outwards and an inner protective layer limiting rib (22) protruding inwards.

Furthermore, the outer protection layer limiting rib (21) and/or the inner protection layer limiting rib (22) are formed by extending part of the support rib (2).

Furthermore, the steel bar framework also comprises an outer layer longitudinal bar (6) and an inner layer longitudinal bar (7) which are connected with the steel bar rings.

Furthermore, a 1-ring or multi-ring concentrically arranged middle ring rib (8) is arranged between the outer ring rib (1) and the inner ring rib (3). The anti-pressure effect is better in the concrete pipe with large pipe diameter or super large caliber.

Further, the reinforcing ring is circular, oval, square or polygonal.

Compared with the prior art, the utility model provides a reinforced concrete pipe has following beneficial effect: through the change of the steel reinforcement framework structure, the external pressure load standard of the pipe body can be achieved by using less steel, the cost is saved, and the market competitiveness of products is improved.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention with a circular radial cross section.

Fig. 2 is an upper schematic view in axial section of an embodiment of the invention.

Fig. 3 is a schematic view showing that the radial section of the reinforcement cage of the present invention is oval.

Figure 4 is the radial section of the steel reinforcement cage of the utility model is a square sketch map.

In the figure: the structure comprises 1 outer ring rib, 2 support ribs, 3 inner ring ribs, 4 outer pipe walls, 5 inner pipe walls, 21 outer protective layer limiting ribs, 22 inner protective layer limiting ribs, 6 outer ring longitudinal ribs, 7 inner ring longitudinal ribs and 8 middle ring ribs.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, the reinforced concrete pipe with an inner diameter of 1 m comprises concrete and a steel reinforcement framework, wherein the steel reinforcement framework comprises a plurality of steel reinforcement rings which are parallel to each other and are arranged along the pipe axis direction, each steel reinforcement ring comprises an outer ring reinforcement 1 and an inner ring reinforcement 3 which are concentrically arranged, the outer ring reinforcements 1 and the inner ring reinforcements 3 are fixedly connected (welded) through support reinforcements 2, and the support reinforcements 2 are uniformly distributed between the outer ring reinforcements 1 and the inner ring reinforcements 3. The supporting bars 2 are arranged along the radial direction of the reinforcing bar ring, so that the effect is more obvious. The reinforced concrete pipe manufactured by the reinforcement cage structure can bear radial pressure. Or a reinforced concrete pipe to achieve the same compressive capacity, using fewer reinforcing bars. Such as: a class II pipe with a nominal diameter of 1000mm needs to use about 26kg/m of steel bars according to the existing structural reinforcement method. The embodiment can achieve the same crack load and damage load test standard only by using the steel bar of about 21 kg/m. Generally, the utility model discloses practice thrift the steel of one fourth than prior art.

In addition, the reinforcing ring further comprises an outer protective layer limiting rib 21 protruding outwards and an inner protective layer limiting rib 22 protruding inwards. The outer protection layer limiting rib 21 and the inner protection layer limiting rib 21 are formed by extending and lengthening parts of the supporting ribs 2 towards two sides. The limiting ribs are arranged in advance, so that the framework can be accurately positioned in the die, and the production of the concrete pipe is facilitated.

Furthermore, the steel bar framework also comprises an outer layer longitudinal bar 6 and/or an inner layer longitudinal bar 7 which are connected with the steel bar rings. The framework is connected into an integral structure, the effect is better, and the production is more convenient.

Further, a middle ring rib 8 which is concentrically arranged is arranged between the outer ring rib 1 and the inner ring rib 3. The anti-pressure effect is better in the concrete pipe with large pipe diameter.

Fig. 3 shows an embodiment in which the tendon rings are oval, and fig. 4 shows an embodiment in which the tendon rings are inner round and outer square.

Furthermore, various special-shaped section pipe bodies adopting the structure similar to the structure are also in the protection scope of the utility model.

Claims

1. The utility model provides a reinforced concrete pipe, includes concrete and framework of steel reinforcement, its characterized in that: the steel bar framework comprises a plurality of steel bar rings which are parallel to each other and are arranged along the direction of a pipe shaft, each steel bar ring comprises an outer ring bar (1) and an inner ring bar (3) which are concentrically arranged, and support bars (2) which are fixedly connected with the outer ring bars (1) and the inner ring bars (3), and the support bars (2) are distributed between the outer ring bars (1) and the inner ring bars (3); the reinforcing ring also comprises outer protective layer limiting ribs (21) protruding outwards and inner protective layer limiting ribs (22) protruding inwards, and the outer protective layer limiting ribs (21) and/or the inner protective layer limiting ribs (22) are formed by extending part of the supporting ribs (2); the steel bar framework also comprises outer layer longitudinal bars (6) and/or inner layer longitudinal bars (7) which are connected with the steel bar rings.

2. A reinforced concrete pipe according to claim 1, wherein said support tendons (2) are arranged in a radial direction of said tendon rings.

3. A reinforced concrete pipe according to claim 1, characterized in that a concentrically arranged middle ring reinforcement (8) is also provided between the outer ring reinforcement (1) and the inner ring reinforcement (3).

4. The reinforced concrete pipe of claim 1, wherein the rebar ring is circular, oval, square, or polygonal.