Annular segment type assembly type prestress combined pipeline

Abstract

The utility model relates to the technical field of constructional engineering, and discloses an annular segment type assembly prestress combined pipeline which comprises a plurality of pipe bodies, the pipe bodies are connected through a plurality of high-strength bolts, filling materials are filled between the pipe bodies and the high-strength bolts, and the pipe bodies comprise a plurality of inner steel plates. An outer steel plate is arranged on one side of the inner steel plate, an annular reinforcement cage is arranged between the outer steel plate and the inner steel plate, a corrugated pipe is arranged in the annular reinforcement cage and is parallel to the annular direction of the pipe piece, a non-viscous prestressed tendon is arranged in the corrugated pipe, an anchorage device set is arranged at one end of the non-viscous prestressed tendon, and an anchor rod set is arranged at the other end of the non-viscous prestressed tendon. The annular end of the outer steel plate is provided with bent honeycomb connecting section steel, and the annular end of the annular reinforcement cage is provided with bent honeycomb connecting section steel. Advantages of a combined structure and rigidity and stability of the pipeline are exerted, anti-cracking performance of the pipeline is improved by applying prestress, adjacent pipe pieces are connected through bolts, construction is convenient and fast, and connection is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a circumferential segmental prefabricated prestressed composite pipeline. Background Technique

[0002] In the early stage, the structural forms applied to pipelines were mostly reinforced concrete structure pipelines, which had the advantages of good integrity and mature construction technology.

[0003] However, reinforced concrete cannot well withstand the internal pressure exerted by high-pressure fluid on the pipeline, and has poor impermeability, which is easy to cause cracking and damage of the pipeline, resulting in huge economic losses. Reinforced concrete pipelines are heavy and the construction process is cumbersome. At the same time, they require large construction and transportation costs, and the economic benefits are relatively low. Therefore, a circumferential segmental prefabricated prestressed composite pipeline is proposed to solve the above problems. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a circumferential segmental prefabricated prestressed composite pipeline, aiming to improve the problems of cumbersome construction process, high construction and transportation costs and low economic benefits in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A circumferential segmental prefabricated prestressed composite pipeline includes a pipe body. A plurality of the pipe bodies are connected by a plurality of high-strength bolts. A filling material is filled between the pipe body and the high-strength bolts. The plurality of pipe bodies include a plurality of inner steel plates. An outer steel plate is arranged on one side of the inner steel plate. A circular steel reinforcement cage is arranged between the outer steel plate and the inner steel plate. A corrugated pipe is arranged in the circular steel reinforcement cage and is parallel to the circumferential direction of the pipe segment. A non-bonded prestressed tendon is arranged inside the corrugated pipe. One end of the non-bonded prestressed tendon is provided with an anchor set. A bent honeycomb connecting section steel is arranged at the circumferential end of the outer steel plate. A bent honeycomb connecting section steel is arranged at the circumferential end of the circular steel reinforcement cage;

[0007] As a further description of the above technical solution:

[0008] One end of the bent honeycomb connecting section steel is provided with a connecting plate;

[0009] As a further description of the above technical solution:

[0010] A space is left between the outer steel plate and the circular steel reinforcement cage for later pouring of precast concrete;

[0011] As a further description of the above technical solution:

[0012] The circular steel reinforcement cage includes arc-shaped steel bars, and there are multiple arc-shaped steel bars. A plurality of longitudinal steel bars are arranged on the multiple arc-shaped steel bars, and the multiple longitudinal steel bars and the arc-shaped steel bars are bundled and connected by stirrups;

[0013] As a further description of the above technical solution:

[0014] Shear studs are arranged on the outer side of the inner steel plate, and shear studs are arranged on the inner side of the outer steel plate;

[0015] As a further description of the above technical solution:

[0016] The bent honeycomb-connected steel section is formed by welding a bent honeycomb steel section and a honeycomb steel section, and circular holes are opened at the webs of the bent honeycomb steel section and the honeycomb steel section. The bent honeycomb-connected steel section is perpendicularly welded to the surface of the connecting plate at equal intervals along the length direction of the segment;

[0017] As a further description of the above technical solution:

[0018] Reserved holes corresponding to high-strength bolts are arranged on the connecting plate. The high-strength bolts pass through the reserved holes to complete the circumferential connection of adjacent segments, and filling materials are filled in the inner wall of the honeycomb steel section;

[0019] As a further description of the above technical solution:

[0020] The connecting plate is reserved with jack tensioning holes, and the tensioning holes correspond to the positions of the non-viscous prestressing tendons.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the circumferential segmental assembled prestressed segment adopts a double steel plate-concrete composite structure, which improves the pipe stiffness and enhances the longitudinal and circumferential bending resistance of the pipe. By adopting the prestress technology, it can effectively improve the pipe's resistance to circumferential tension, thereby enabling the structure to have good crack resistance, impermeability and durability, making the utility model applicable to more complex working environments.

[0023] 2. In the utility model, the segments are prefabricated in the factory. When casting the precast concrete of the segments, the inner and outer steel plates can act as formworks, simplifying the construction process. The circumferential segmental assembled prestressed composite pipe structure is simple in form. The adjacent segments are dry-connected by high-strength bolts, which is convenient and reliable to connect. Only the connection of high-strength bolts and the post-cast filling materials need to be carried out on site, and the construction is fast, so as to solve the problem of slow traditional construction.

[0024] 3. The circumferential segment - type precast prestressed segment adopts a double - steel - plate - concrete composite structure. Compared with the reinforced concrete structure, it has greater stiffness. Under the same bearing capacity design requirements, it gives full play to the material properties of steel, replaces a large amount of concrete usage, and reduces the self - weight of the structure. The form of using inner and outer double steel plates reduces the amount of internal steel bars. The connection on the construction site is simple, with less labor demand, and can significantly reduce the labor cost. Brief Description of the Drawings

[0025] Figure 1 is the overall schematic diagram of the circumferential segment - type precast prestressed composite pipeline of the present invention;

[0026] Figure 2 is the overall schematic diagram of the circumferential segment - type precast prestressed segment of the present invention;

[0027] Figure 3 is the cross - sectional schematic diagram of the circumferential segment - type precast prestressed segment of the present invention;

[0028] Figure 4 is the splicing structure diagram of the circumferential segment - type precast prestressed segment of the present invention;

[0029] Figure 5 is the splicing schematic diagram of the circumferential segment - type precast prestressed segment (before concrete pouring at the connection);

[0030] Figure 6 is the splicing schematic diagram of the circumferential segment - type precast prestressed segment (after concrete pouring at the connection);

[0031] Figure 7 is Figure 3 the detailed drawing of the A - A section in, that is, the cross - sectional drawing of the connection part of the minimum precast unit of the circumferential segment - type precast prestressed composite pipeline;

[0032] Figure 8 is Figure 3 the detailed drawing of the B - B section in, that is, the cross - sectional drawing of the main body part of the minimum precast unit of the circumferential segment - type precast prestressed composite pipeline.

[0033] Legend:

[0034] 1. Pipe body; 2. Inner steel plate; 3. Outer steel plate; 4. Circular steel cage; 5. Arc - shaped steel bar; 6. Longitudinal steel bar; 7. Tie bar; 8. Bellows; 9. Unbonded prestressing tendon; 10. Anchor set; 11. Shear - resistant stud; 12. Bent honeycomb connection steel; 13. Connecting plate; 14. Reserved hole; 15. Tensioning hole; 16. High - strength bolt; 17. Precast concrete; 18. Filling material. Detailed Description of the Invention

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] Referring to Figures 1 - 3 , an embodiment provided by the present utility model: a circumferential segment type assembled prestressed composite pipeline, including a pipe body 1, a plurality of pipe bodies 1 are connected by a plurality of high-strength bolts 16, and a filling material 18 is filled between the pipe body 1 and the high-strength bolts 16. The plurality of pipe bodies 1 include a plurality of inner steel plates 2, an outer steel plate 3 is arranged on one side of the inner steel plate 2, a circular steel reinforcement cage 4 is arranged between the outer steel plate 3 and the inner steel plate 2, and a corrugated pipe 8 is arranged in the circular steel reinforcement cage 4 and is parallel to the circumferential direction of the segment ring. A non-bonded prestressed tendon 9 is arranged inside the corrugated pipe 8, one end of the non-bonded prestressed tendon 9 is provided with an anchor set 10, a bent honeycomb connecting section steel 12 is arranged at the circumferential end of the outer steel plate 3, and a bent honeycomb connecting section steel 12 is arranged at the circumferential end of the circular steel reinforcement cage 4. It is characterized in that: a connecting plate 13 is arranged at one end of the bent honeycomb connecting section steel 12. A space is left between the outer steel plate 3 and the circular steel reinforcement cage 4 for later pouring of precast concrete 17.

[0037] An embodiment of a circumferential segment type assembled prestressed composite pipeline includes a plurality of pipe bodies 1, and each pipe body 1 is composed of an inner steel plate 2, an outer steel plate 3 and a circular steel reinforcement cage 4. The pipe bodies 1 are connected by a plurality of high-strength bolts 16, and these bolts 16 form a tight connection between the segments 1. The connection is filled with a filling material 18, such as epoxy resin, high-strength grouting material, ECC, RPC or UHPC, to enhance the strength and sealing performance of the connection. A corrugated pipe 8 is arranged in the circular steel reinforcement cage 4 inside each pipe body 1, and a non-bonded prestressed tendon 9 is preset in the corrugated pipe 8. The prestressed tendon 9 is fixed at both ends of the segment by an anchor set 10. Bent honeycomb connecting section steels 12 are provided at the circumferential ends of the outer steel plate 3 and the circular steel reinforcement cage 4. These section steels 12 enhance the structural strength of the segments. A connecting plate 13 is installed at one end of the section steel 12 to facilitate docking when connecting with other segments 1. The space between the outer steel plate 3 and the circular steel reinforcement cage 4 is reserved for later pouring of precast concrete 17. The pouring of the concrete improves the compressive capacity and stability of the overall pipeline. The design of the overall structure aims to improve the bearing capacity and durability of the pipeline, while ensuring stability and connectivity during the construction process

[0038] Referring to Figures 3 - 8, the circular steel reinforcement cage 4 includes arc-shaped steel bars 5, and there are multiple arc-shaped steel bars 5. A plurality of longitudinal steel bars 6 are arranged on the multiple arc-shaped steel bars 5, and the multiple longitudinal steel bars 6 and the arc-shaped steel bars 5 are tied and connected by stirrups 7. Shear studs 11 are arranged on the outer side of the inner steel plate 2, and shear studs 11 are arranged on the inner side of the outer steel plate 3. The bent honeycomb connecting section steel 12 is formed by welding a bent honeycomb section steel and a honeycomb section steel, and circular holes are opened at the webs of the bent honeycomb section steel and the honeycomb section steel. The bent honeycomb connecting section steel 12 is vertically welded to the surface of the connecting plate 13 at equal intervals along the length direction of the segment. Reserved holes 14 corresponding to high-strength bolts 16 are arranged on the connecting plate 13. The high-strength bolts 16 pass through the reserved holes 14 to complete the circumferential connection of adjacent segments, and a filling material 18 is filled in the inner wall of the honeycomb section steel. It is characterized in that: the connecting plate 13 is provided with a jack tensioning hole 15, and the tensioning hole 15 corresponds to the position of the non-bonded prestressed tendon 9.

[0039] In an embodiment of a circumferential segmental precast prestressed composite pipeline, the pipeline includes a plurality of pipe bodies 1. Each pipe body 1 is provided with a circular steel reinforcement cage 4, which is composed of a plurality of arc-shaped steel bars 5 and longitudinal steel bars 6. The arc-shaped steel bars 5 and the longitudinal steel bars 6 are tied and connected by stirrups 7. Shear studs 11 are provided on the outer side of the inner steel plate 2 and the inner side of the outer steel plate 3 to enhance the shear resistance of the structure. The end of each pipe body 1 is assembled with a bent honeycomb connecting section steel 12, which is formed by welding a bent honeycomb section steel and a honeycomb section steel, and circular holes are opened at the web. The bent honeycomb connecting section steel 12 is vertically welded to the surface of the connecting plate 13 at equal intervals along the length direction of the segment. Reserved holes 14 are arranged on the connecting plate 13 for high-strength bolts 16 to pass through to complete the circumferential connection of adjacent segments. The inner wall of the honeycomb section steel is filled with a filling material 18 to enhance the stability and sealing performance of the structure. It is characterized in that a jack tensioning hole 15 is reserved on the connecting plate 13, and the tensioning hole 15 corresponds to the position of the non-bonded prestressed tendon 9. During the assembly process, the prestressed tendon 9 can be conveniently tensioned through the tensioning hole 15, further improving the overall prestress and stability of the pipeline.

[0040] Working principle: In the factory, shear studs 11 are welded on the outer side of the arc-shaped inner steel plate 2 and the inner side of the arc-shaped outer steel plate 3. The arc-shaped steel bars 5, longitudinal steel bars 6, and stirrups 7 are tied to form a circular steel reinforcement cage 4, which is placed between the arc-shaped inner steel plate 2 and the arc-shaped outer steel plate 3. The bent honeycomb section steel and the honeycomb section steel are welded together and inserted into a customized template. The honeycomb section steel is welded to the connecting plate 13. The precast concrete 17 is poured, and after curing, the formwork is removed. The non-bonded prestressed tendon 9 is tensioned and anchored through the jack tensioning hole 15 of the connecting plate 13 to complete the prefabrication of the segment. On-site, adjacent segments are connected by reserved holes 14 using high-strength bolts 16 to form a pipe section, and the post-cast material 18 is filled. Adjacent pipe sections are connected by welding, and the above process is repeated to complete the longitudinal construction of the overall pipeline.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A circumferential segment type assembled prestressed composite pipeline, comprising a pipe body (1), characterized in that: The pipe body (1) is connected by a plurality of high-strength bolts (16). A filling material (18) is filled between the plurality of pipe bodies (1) and the high-strength bolts (16). The plurality of pipe bodies (1) include a plurality of inner steel plates (2). An outer steel plate (3) is arranged on one side of the inner steel plate (2). An annular steel reinforcement cage (4) is arranged between the outer steel plate (3) and the inner steel plate (2). A corrugated pipe (8) is arranged in the annular steel reinforcement cage (4) and is parallel to the circumferential direction of the segment. A non-bonded prestressed tendon (9) is arranged inside the corrugated pipe (8). An anchor set (10) is arranged at one end of the non-bonded prestressed tendon (9). A bent honeycomb connecting section steel (12) is arranged at the circumferential end of the outer steel plate (3). A bent honeycomb connecting section steel (12) is arranged at the circumferential end of the annular steel reinforcement cage (4).

2. The circumferential segment type assembled prestressed combined pipeline according to claim 1, characterized in that: A connecting plate (13) is arranged at one end of the bent honeycomb connecting section steel (12).

3. The circumferential segment type assembled prestressed combined pipeline according to claim 1, characterized in that: A space is left between the outer steel plate (3) and the annular steel reinforcement cage (4) to facilitate the later pouring of precast concrete (17).

4. A circumferential segment type assembled prestressed combined pipeline according to claim 1, characterized in that: The annular steel reinforcement cage (4) includes arc-shaped steel bars (5). A plurality of arc-shaped steel bars (5) are provided. A plurality of longitudinal steel bars (6) are arranged on the plurality of arc-shaped steel bars (5). The plurality of longitudinal steel bars (6) and the arc-shaped steel bars (5) are tied and connected by stirrups (7).

5. A circumferential segment type assembled prestressed composite pipeline according to claim 1, characterized in that: Shear studs (11) are arranged on the outer side of the inner steel plate (2). Shear studs (11) are arranged on the inner side of the outer steel plate (3).

6. The circumferential segment type assembled prestressed composite pipeline according to claim 1, characterized in that: The bent honeycomb connecting section steel (12) is formed by welding a bent honeycomb section steel and a honeycomb section steel. Round holes are opened at the webs of the bent honeycomb section steel and the honeycomb section steel. The bent honeycomb connecting section steel (12) is vertically welded to the surface of the connecting plate (13) at equal intervals along the length direction of the segment.

7. The circumferential segment type assembled prestressed combined pipeline according to claim 6, characterized in that: Reserved holes (14) corresponding to the high-strength bolts (16) are arranged on the connecting plate (13). The high-strength bolts (16) pass through the reserved holes (14) to complete the circumferential connection of adjacent segments, and the filling material (18) is filled in the inner wall of the honeycomb section steel.

8. A circumferential segment type assembled prestressed composite pipeline according to claim 7, characterized in that: The connecting plate (13) is reserved with a jack tensioning hole (15). The tensioning hole (15) corresponds to the position of the non-bonded prestressed tendon (9).

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