Longitudinal section type prestress assembly type combined pipeline

Abstract

The utility model relates to the technical field of pipelines, and discloses a longitudinal segment type prestress assembly type combined pipeline which comprises two inner steel pipes, annular reinforcement cages are arranged on the peripheries of the inner steel pipes, annular corrugated pipes are arranged in the annular reinforcement cages, unbonded prestressed tendons are arranged in the annular corrugated pipes, and the unbonded prestressed tendons are arranged in the annular corrugated pipes. Anchor set sets are arranged at the two ends of the unbonded prestressed tendons, and prefabricated concrete is arranged on the periphery of the inner steel pipe. The steel and concrete combined structure has the advantages of high rigidity, high bearing capacity and good stability, the tensile strength and impermeability of the pipeline are improved through the inner steel pipe, the crack resistance of the pipeline is improved through the prestress technology, the high-strength concrete is adopted, the self weight is reduced, and transportation and hoisting are facilitated. All the components are prefabricated in a factory and spliced on site, the construction efficiency is high, and the device is suitable for large-diameter water conveying pipelines and has wide engineering application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a longitudinal segment type prestressed assembled composite pipeline. Background Technique

[0002] As an important part of the water conveyance project, the pipeline should have good performance, otherwise it will directly affect the quality of the project construction.

[0003] Traditional water conveyance pipelines are mainly made of reinforced concrete structures, which have the advantages of good integrity and mature construction technology. However, the reinforced concrete structure has low bearing capacity, long construction period, complex processes, large self-weight, high construction and transportation costs, poor crack resistance and impermeability. Once cracked, it will cause huge economic losses. For water conveyance pipelines that bear large circumferential tensile stresses, traditional reinforced concrete pipelines cannot well meet their usage requirements. Therefore, a longitudinal segment type prestressed assembled 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 longitudinal segment type prestressed assembled composite pipeline, aiming to improve the problems of high construction and transportation costs and poor crack resistance and impermeability in the prior art.

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

[0006] A longitudinal segment type prestressed assembled composite pipeline includes two inner steel pipes. An annular steel reinforcement cage is arranged on the outer periphery of the inner steel pipe. An annular corrugated pipe is arranged inside the annular steel reinforcement cage. Unbonded prestressed tendons are arranged inside the annular corrugated pipe. Anchor sleeve groups are arranged at both ends of the unbonded prestressed tendons. Prefabricated concrete is arranged on the outer periphery of the inner steel pipe. Annular connectors are arranged at both ends of the inner steel pipe. A fixing component is arranged on one side where the two prefabricated concretes face each other, and the fixing component is used to fix the two prefabricated concretes;

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

[0008] The fixing component includes high-strength bolts, and the outer periphery of the high-strength bolts is threadedly connected inside the prefabricated concrete. Filling materials are arranged on one side where the two prefabricated concretes face each other;

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

[0010] The filling material can be made of high-strength concrete, self-compacting concrete, ECC or UHPC, and the prefabricated concrete can be made of high-strength concrete, recycled concrete, self-compacting concrete, RPC or UHPC;

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

[0012] A plurality of stud bolts are uniformly distributed on the outer periphery of the inner steel pipe;

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

[0014] The annular steel reinforcement cage includes longitudinal steel bars, circumferential steel bars and tie bars;

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

[0016] The unbonded prestressed tendon is made of stress-relieved steel wire or steel strand;

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

[0018] The annular connecting member includes two annular flange plates, and an annular perforated steel plate is fixedly connected to the top of the annular flange plate;

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

[0020] The opening positions of the annular perforated steel plate are uniformly arranged in the circumferential direction, and the cross-sectional shape of the opening can be circular, square or honeycomb-shaped. A plurality of uniformly distributed reserved bolt holes are formed inside the annular flange plate, and the two annular flange plates are respectively fixedly connected to the upper and lower ends of the inner steel pipe.

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

[0022] 1. In the utility model, the longitudinally segmented prestressed assembled composite pipeline adopts a steel-concrete composite structure, which has the advantages of large stiffness, high bearing capacity and good stability. Stud bolts are arranged on the outer wall of the inner steel pipe to enhance the cooperative working ability of the steel pipe and concrete. By adopting prestress technology, the circumferential tensile strength of the pipeline is improved, and it has good crack resistance and durability.

[0023] 2. In the utility model, the structure of the longitudinally segmented prestressed assembled composite pipeline is simple. Adjacent pipe section units are connected by high-strength bolts of the annular connecting member, and the connection is convenient and reliable. The pipe section units are prefabricated in the factory, connected on site and filled with filling materials at the joints, which improves the construction efficiency. When casting the main precast concrete of the pipe section unit, the inner steel pipe can act as the inner formwork, which also simplifies the construction process.

[0024] 3. In the utility model, the longitudinally segmented assembled prestressed pipeline applies prestress technology and high-performance concrete, which gives full play to the material characteristics of steel and concrete, saves material consumption, reduces the self-weight of the pipeline, is convenient for transportation and hoisting, reduces the project cost, and has good economic benefits. Description of the Drawings

[0025] Figure 1 Overall schematic diagram of a longitudinally segmented prestressed prefabricated composite pipeline (before pouring and filling materials at the connection) proposed by the present utility model;

[0026] Figure 2 Overall schematic diagram of a longitudinally segmented prestressed prefabricated composite pipeline (after pouring and filling materials at the connection) proposed by the present utility model;

[0027] Figure 3 Structural schematic diagram of the annular perforated steel plate of a longitudinally segmented prestressed prefabricated composite pipeline proposed by the present utility model;

[0028] Figure 4 Structural schematic diagram of the precast concrete of a longitudinally segmented prestressed prefabricated composite pipeline proposed by the present utility model;

[0029] Figure 5 Structural schematic diagram of the annular connecting piece of a longitudinally segmented prestressed prefabricated composite pipeline proposed by the present utility model;

[0030] Figure 6 Cross-sectional view of a longitudinally segmented prestressed prefabricated composite pipeline proposed by the present utility model;

[0031] Figure 7 Longitudinal sectional view of a longitudinally segmented prestressed prefabricated composite pipeline proposed by the present utility model.

[0032] Legend description:

[0033] 1. Reserved bolt holes; 2. High-strength bolts; 3. Filling materials; 4. Inner steel pipe; 5. Annular steel reinforcement cage; 6. Annular corrugated pipe; 7. Unbonded prestressed tendons; 8. Anchor set; 9. Precast concrete; 10. Annular connecting piece; 11. Studs; 12. Longitudinal steel bars; 13. Circumferential steel bars; 14. Tie bars; 15. Annular perforated steel plate; 16. Annular flange plate. Specific implementation manners

[0034] 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 of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] Refer to Figure 1 、 Figure 3 、 Figure 6 and Figure 7, An embodiment provided by the present utility model: A longitudinal segmental prestressed assembled composite pipeline, which includes two inner steel pipes 4. An annular steel reinforcement cage 5 is arranged on the outer periphery of the inner steel pipe 4. An annular corrugated pipe 6 is arranged inside the annular steel reinforcement cage 5. A non-bonded prestressed tendon 7 is arranged inside the annular corrugated pipe 6. Anchor sleeve groups 8 are arranged at both ends of the non-bonded prestressed tendon 7. Precast concrete 9 is arranged on the outer periphery of the inner steel pipe 4. Annular connectors 10 are arranged at both ends of the inner steel pipe 4. The inner steel pipe 4 serves as the main structure to provide internal support and load-bearing capacity for the pipeline. The annular steel reinforcement cage 5 is used to enhance the tensile stress and overall structural strength of the concrete. The annular corrugated pipe 6 is used to increase the flexibility and seismic resistance of the pipeline. The non-bonded prestressed tendon 7 is used to improve the tensile capacity of the prestressed tendon of the overall pipeline. The anchor sleeve groups 8 are used to fix the ends of the prestressed tendons to ensure the transfer and stability of the prestressed force. The precast concrete 9 constitutes the main structure of the pipeline to provide overall load-bearing capacity and durability. The annular connectors 10 are used to connect different segments of the pipeline to ensure the integrity and stability of the structure.

[0036] Refer to Figure 1 and Figure 2 , On the opposite sides of two precast concretes 9, there is a fixing component, which is used to fix the two precast concretes 9. The fixing component includes high-strength bolts 2, and the outer periphery of the high-strength bolts 2 is threadedly connected inside the precast concrete 9. Filling materials 3 are arranged on the opposite sides of the two precast concretes 9. The high-strength bolts 2 are used to fix and reinforce the connection of the pipeline components. The filling materials 3 can fill the gaps and are used to provide protection and support.

[0037] Refer to Figure 3 - Figure 5, the filling material 3 can be made of high-strength concrete, self-compacting concrete, ECC or UHPC, and the precast concrete 9 can be made of high-strength concrete, recycled concrete, self-compacting concrete, RPC or UHPC. Multiple uniformly distributed stud bolts 11 are arranged on the outer periphery of the inner steel pipe 4. The circular steel reinforcement cage 5 includes longitudinal steel bars 12, circumferential steel bars 13 and tie bars 14. The unbonded prestressed tendon 7 is made of stress-relieved steel wires or steel strands. The circular connecting member 10 includes two circular flange plates 16. The top of the circular flange plate 16 is fixedly connected with a circular perforated steel plate 15. The hole-opening positions of the circular perforated steel plate 15 are uniformly arranged along the circumferential direction, and the cross-sectional shape of the hole opening can be circular, square or honeycomb-shaped. Multiple uniformly distributed reserved bolt holes 1 are formed inside the circular flange plate 16. The two circular flange plates 16 are respectively fixedly connected to the upper and lower ends of the inner steel pipe 4. The filling material 3 can be high-strength concrete, self-compacting concrete, ECC or UHPC, and is selected according to the actual engineering requirements for concrete. The precast concrete 9 can be high-strength concrete, recycled concrete, self-compacting concrete, RPC or UHPC, and is selected according to the actual engineering requirements for concrete. The unbonded prestressed tendon 7 can adopt stress-relieved steel wires or steel strands and is tensioned to the design value by the post-tensioning method. The hole-opening positions of the circular perforated steel plate 15 are uniformly arranged along the circumferential direction, and the cross-sectional shape of the hole opening can be circular, square or honeycomb-shaped. The reserved bolt holes 1 are used for subsequent installation and connection of other components. The stud bolts 11 are used for specific connection and fixing functions. The longitudinal steel bars 12 are used to enhance the longitudinal strength and stability of the pipeline. The circumferential steel bars 13 are used to increase the circumferential compressive capacity and overall strength of the pipeline. The tie bars 14 are used to enhance the tensile stress at the connection parts and bending parts of the pipeline. The circular perforated steel plate 15 is used to support and connect other structural components. The circular flange plate 16 is used for the end connection and closure of the pipeline.

[0038] Working principle: In the factory, stud bolts 11 are welded on the outer wall of the inner steel pipe 4 and prestressed tension holes are reserved. The longitudinal steel bars 12, circumferential steel bars 13 and tie bars 14 are tied to form a circular steel reinforcement cage 5 and a circular corrugated pipe 6 is placed. The reserved holes are processed and welded on the circular perforated steel plate 15 and the circular flange plate 16 to form a circular connecting member 10. The circular connecting member 10 is welded to the end of the inner steel pipe 4 and precast concrete 9 is poured on its outer side. In the factory, after the strength of the precast concrete 9 reaches the requirements, the unbonded prestressed tendon 7 is inserted into the circular corrugated pipe 6, and the unbonded prestressed tendon 7 is tensioned and anchored at the hole opening of the inner steel pipe 4 to complete the precast part. On-site, adjacent pipe sections are connected by high-strength bolts 2 passing through the reserved bolt holes 1 of the circular connecting member 10, and the filling material 3 is poured at the connection. After the strength meets the standard, the production of the pipeline is completed.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded 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 invention shall be included within the protection scope of the present invention.

Claims

1. A longitudinal segmental prestressed assembled composite pipeline, comprising two inner steel pipes (4), characterized in that: An annular steel cage (5) is arranged on the outer periphery of the inner steel pipe (4), an annular corrugated pipe (6) is arranged inside the annular steel cage (5), non-bonded prestressed tendons (7) are arranged inside the annular corrugated pipe (6), and anchor kits (8) are arranged at both ends of the non-bonded prestressed tendons (7). Precast concrete (9) is arranged on the outer periphery of the inner steel pipe (4), and annular connecting pieces (10) are arranged at both ends of the inner steel pipe (4). A fixing assembly is arranged on the opposite side of the two precast concretes (9), and the fixing assembly is used to fix the two precast concretes (9).

2. A longitudinal segmental prestressed assembled composite pipeline according to claim 1, characterized in that: The fixing assembly comprises a high-strength bolt (2), the outer periphery of the high-strength bolt (2) being threadedly connected to the interior of the precast concrete (9), and a filling material (3) is provided on the opposite sides of the two precast concretes (9).

3. A longitudinal segmental prestressed assembled composite pipeline according to claim 2, characterized in that: The filling material (3) is made of one of high-strength concrete, self-compacting concrete, ECC or UHPC, and the precast concrete (9) is made of one of high-strength concrete, recycled concrete, self-compacting concrete, RPC or UHPC.

4. The longitudinal segmental prestressed assembled composite pipeline according to claim 1, characterized in that: The outer periphery of the inner steel pipe (4) is provided with a plurality of evenly distributed bolts (11).

5. The longitudinal segmental prestressed assembled composite pipeline according to claim 1, characterized in that: The annular steel reinforcement cage (5) comprises longitudinal steel bars (12), annular steel bars (13) and tension bars (14).

6. The longitudinal segmental prestressed assembled composite pipeline according to claim 1, characterized in that: The material of the unbonded prestressed tendons (7) is stress-relieving steel wire or steel strand.

7. The longitudinal segment prestressed assembled composite pipeline according to claim 1, characterized in that: The annular connecting member (10) comprises two annular flange plates (16), and an annular perforated steel plate (15) is fixedly connected to the top of the annular flange plate (16).

8. The longitudinal segmental prestressed assembled composite pipeline according to claim 7, characterized in that: The opening positions of the annular perforated steel plate (15) are evenly arranged along the annular direction, and the cross-sectional shape of the opening is one of circular, square or honeycomb. The annular flange plate (16) is provided with a plurality of evenly distributed reserved bolt holes (1). The two annular flange plates (16) are respectively fixedly connected to the upper and lower ends of the inner steel pipe (4).

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