阅读说明：本技术 油气多相输送一体化平腔管道结构体系及施工方法 (Oil-gas multiphase conveying integrated flat-cavity pipeline structure system and construction method ) 是由 计静 刘迎春 姜良芹 *** 梁媛 薛婷 于 2019-09-18 设计创作，主要内容包括：一种油气多相输送一体化平腔管道结构体系及施工方法,涉及管道技术领域,它由两条管道通过GFRP防屈曲耗能阻尼器连接而成,两条管道并排平行布置,每条管道包括管道单体和整体式节点,管道单体包括外层GFRP圆管、内层GFRP圆管和自密实细石混凝土层,管道单体两端部分别设有螺栓孔；外层GFRP圆管外壁上设有外层GFRP圆管预留螺栓孔；两个管道单体之间通过整体式节点连接,整体式节点通过高强螺栓与两个管道单体端部的螺栓孔连接,整体式节点外壁上设有混凝土浇筑孔和排气孔,混凝土浇筑孔和排气孔间隔分布。本油气多相输送一体化平腔管道结构体系及施工方法解决了传统管道直径小、稳定性与抗渗性差的问题。(A gas and oil multiphase transport integrated flat cavity pipeline structure system and a construction method relate to the technical field of pipelines and are formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers, wherein the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline monomer and an integrated node, the pipeline monomer comprises an outer GFRP circular pipe, an inner GFRP circular pipe and a self-compacting fine stone concrete layer, and bolt holes are respectively arranged at two end parts of the pipeline monomer; the outer wall of the outer layer GFRP circular pipe is provided with an outer layer GFRP circular pipe reserved bolt hole; through integral nodal connection between two pipeline monomers, integral node is through the bolt hole connection of high strength bolt and two pipeline monomer tip, is equipped with concrete placement hole and exhaust hole on the integral node outer wall, concrete placement hole and exhaust hole interval distribution. The oil-gas multiphase conveying integrated flat-cavity pipeline structure system and the construction method solve the problems of small diameter, poor stability and poor impermeability of the traditional pipeline.)

1. The utility model provides a heterogeneous flat chamber pipeline structure system of integration of carrying of oil gas which characterized in that: the anti-buckling energy dissipation device is formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers (14), the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline monomer (1) and an integral node (4), the pipeline monomer (1) comprises an outer GFRP circular pipe (10), an inner GFRP circular pipe (11) and a self-compacting fine stone concrete layer (12), the outer GFRP circular pipe (10) internally surrounds the inner GFRP circular pipe (11), an interlayer is arranged between the outer GFRP circular pipe (10) and the inner GFRP circular pipe (11), the interlayer is filled with the self-compacting fine stone concrete layer (12), a plurality of anti-shearing connecting keys (5) are uniformly distributed on the inner walls of the outer GFRP circular pipe (10) and the inner GFRP circular pipe (11) in the circumferential direction, the anti-shearing connecting keys (5) on the inner walls of the outer GFRP circular pipe (10) and the inner GFRP circular pipe (11) are arranged in a staggered mode, bolt holes (6) are respectively arranged at two, the bolt holes (6) penetrate through the outer layer GFRP circular tube (10), the inner layer GFRP circular tube (11) and the self-compacting fine stone concrete layer (12); the outer wall of the outer layer GFRP circular pipe (10) is provided with an outer layer GFRP circular pipe reserved bolt hole (16); connect through integral node (4) between two pipeline monomer (1), integral node (4) are connected through bolt hole (6) of high strength bolt (7) and two pipeline monomer (1) tip, are equipped with concrete placement hole (8) and exhaust hole (9) on integral node (4) outer wall, and concrete placement hole (8) and exhaust hole (9) interval distribution.

2. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: integral node (4) including outer GFRP pipe (10), inlayer GFRP pipe (11) and self-compaction graticule concrete layer (12), outer GFRP pipe (10) inner ring is around inlayer GFRP pipe (11), be equipped with the intermediate layer between outer GFRP pipe (10) and inlayer GFRP pipe (11), be full of self-compaction graticule concrete layer (12) in the intermediate layer, equal circumference equipartition of outer GFRP pipe (10) and inlayer GFRP pipe (11) inner wall has a plurality of shear connection key (5), and shear connection key (5) mutual staggered arrangement on outer GFRP pipe (10) and inlayer GFRP pipe (11) inner wall.

3. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 2, characterized in that: the outer diameter of the inner GFRP circular tube (11) of the integral node (4) is equal to the inner diameter of the inner GFRP circular tube (11) of the pipeline single body (1); the inner diameter of the outer GFRP circular tube (10) of the integral node (4) is equal to the outer diameter of the outer GFRP circular tube (10) of the pipeline single body (1).

4. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 2, characterized in that: the outer GFRP circular tube (10) outer wall of the integral node (4) is provided with concrete pouring holes (8) and exhaust holes (9), and the concrete pouring holes (8) and the exhaust holes (9) are distributed at intervals.

5. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: the single pipeline (1) is a single pipe with a circular section; the outer layer GFRP circular tube (10) and the inner layer GFRP circular tube (11) are seamless winding type GFRP circular tubes.

6. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: the pipeline is a double pipe and the section of the pipeline is circular.

7. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: the pipeline monomer (1) is one of a linear pipeline monomer, a curved pipeline monomer (2) or a crossing pipeline monomer (3).

8. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: GFRP anti-buckling energy-dissipation dampers (14) are horizontally and symmetrically arranged on the side face of the pipeline single body (1), one end of the GFRP anti-buckling energy-dissipation damper (14) is connected with the outer wall of the pipeline single body (1) through a claw-type connecting piece (13), and the other end of the GFRP anti-buckling energy-dissipation damper (14) is hinged with a foundation (15); one end of the claw type connecting piece (13) is provided with a circular ring and is hinged with the GFRP buckling-restrained energy dissipation damper (14), the other end of the claw type connecting piece (13) is provided with a reserved bolt hole, and the reserved bolt hole is connected with an outer layer GFRP circular tube reserved bolt hole (16) through a high-strength bolt (7).

9. The oil and gas multiphase delivery integrated flat cavity pipeline structure system according to claim 1, characterized in that: the two ends of the GFRP buckling-restrained energy-dissipation damper (14) between the two pipelines are hinged to one end of a claw-type connecting piece (13), and the other end of the claw-type connecting piece (13) is connected with an outer-layer GFRP circular tube reserved bolt hole (16) of the outer wall of the corresponding pipeline single body (1) through a high-strength bolt (7).

10. The construction method of the oil-gas multiphase transmission integrated flat cavity pipeline structure system according to claim 1, characterized by comprising the following steps of: the method comprises the following steps:

prefabricating a pipeline monomer (1) in a factory, blanking an inner layer GFRP circular pipe (11) and an outer layer GFRP circular pipe (10) according to size requirements, arranging shear-resistant connecting keys (5) on the outer side of the inner layer GFRP circular pipe (11) and the inner side of the outer layer GFRP circular pipe (10), reserving bolt holes (6) at two end parts of the inner layer GFRP circular pipe (11) and the outer layer GFRP circular pipe (10), reserving bolt holes (16) at the outer layer GFRP circular pipe on the outer layer GFRP circular pipe (10), connecting a claw type connecting piece (13) with the outer layer GFRP circular pipe (10), concentrically and vertically placing the inner layer GFRP circular pipe (11) in the outer layer GFRP circular pipe (10), screwing high-strength bolts (7) at two ends, pouring a self-compaction fine stone concrete layer (12) between the inner layer GFRP circular pipe (11) and the outer layer GFRP circular pipe (10) from top to bottom, loosening and repeatedly twisting the high-strength bolts (7) after the concrete is initially set, forming bolt holes (6), and forming a pipeline single body (1) after maintenance;

prefabricating an inner layer GFRP circular pipe (11) and an outer layer GFRP circular pipe (10) for forming an integral node (4) in a factory, arranging shear-resistant connecting keys (5) on the outer side of the inner layer GFRP circular pipe (11) and the inner side of the outer layer GFRP circular pipe (10) according to a certain rule, reserving bolt holes (6) at two end parts of the inner layer GFRP circular pipe (11) and the outer layer GFRP circular pipe (10), and reserving concrete pouring holes (8) and exhaust holes (9) at the top part of the outer layer GFRP circular pipe (10);

transporting the prefabricated pipe single body (1) and the inner GFRP circular pipe (11) and the outer GFRP circular pipe (11) of the integral node (4) to the site, arranging pipeline monomers (1) on the site soil, arranging the pipeline monomers (1) of the same section of the two pipelines in parallel side by side, then an inner GFRP circular tube (11) of the integral node (4) is placed into an outer GFRP circular tube (10) and the two are concentrically inserted into the single pipeline body (1), the pipeline monomer (1) and the integral node (4) are fixedly connected by a high-strength bolt (7), then, a concrete pump is used for pouring the stirred self-compacting fine stone concrete into an interlayer of an inner GFRP circular tube (11) and an outer GFRP circular tube (10) of the integral node (4) through a concrete pouring hole (8), stopping pouring when concrete at the exhaust holes (9) overflows, and sequentially connecting the pipeline monomers (1) through the integral nodes (4);

GFRP anti-buckling energy-consumption dampers (14) are prefabricated in a factory and are installed on site, the GFRP anti-buckling energy-consumption dampers are arranged between two combined pipelines, two ends of the GFRP anti-buckling energy-consumption dampers (14) are connected with claw-type connecting pieces (13) installed on outer-layer GFRP circular tubes (10) of single pipelines (1) of the two pipelines through high-strength bolts (7) in a hinged mode, then the GFRP anti-buckling energy-consumption dampers (14) are arranged between a foundation (15) and the single pipelines (1), one ends of the GFRP anti-buckling energy-consumption dampers are connected with rings of the claw-type connecting pieces (13) through the high-strength bolts (7), the other ends of the GFRP anti-buckling energy-consumption dampers are connected with the foundation (15), the connecting modes of the two ends are hinged, the GFRP anti-buckling energy-consumption dampers (14) are arranged at intervals along the direction of the pipelines in the above.

The technical field is as follows:

the invention relates to the technical field of pipelines, in particular to an oil-gas multiphase conveying integrated flat cavity pipeline structure system and a construction method.

Background art:

conventional long-distance pipelines are mostly round steel pipe pipelines and reinforced concrete round pipelines, the diameters of the pipelines are mostly within the range of 0.5-1.5 m, one ends of the pipelines adopt the form of enlarged heads, and the pipelines are connected through end sockets. Liquid is conveyed in the steel pipe all the year round, the steel pipe is easy to rust, the effective thickness of the pipe wall can be reduced due to long-term erosion, the rigidity of the pipe wall is reduced, and local buckling is easy to occur under the action of soil and external pressure. Meanwhile, as the inner wall of the pipeline is corroded by liquid, more and more impurities are generated, the quality inspection is difficult to reach the standard, and the pipeline cannot be replaced when the designed service life is reached. The reinforced concrete pipeline is easy to rust under the liquid erosion for a long time, the impermeability of the pipe wall is difficult to ensure, and the leakage phenomenon can be formed for a long time. After the pipeline area experiences slight vibration, the conventional connection of the reinforced concrete pipeline port is easy to loosen, and the tightness of the pipeline is difficult to ensure. Conventional pipeline mostly is the single tube, only can carry a medium simultaneously, and conveying function is more single and conveying efficiency is not high. Later to avoid pipe leakage, steel pipes were placed in the middle of concrete pipes to form built-in steel pipe concrete composite pipes, which, while increasing the rigidity and strength of the pipes, presented a greater challenge to reliable connections between the pipes.

The invention content is as follows:

the invention aims to overcome the defects of the prior art, provides an oil-gas multiphase transmission integrated flat cavity pipeline structure system and a construction method thereof, is used for solving the problems of small diameter, poor stability and poor impermeability of the traditional pipeline, and also provides the construction method of the oil-gas multiphase transmission integrated flat cavity pipeline structure system.

The technical scheme adopted by the invention is as follows: an oil-gas multiphase conveying integrated flat cavity pipeline structure system and a construction method are formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers, the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline monomer and an integral node, the pipeline monomer comprises an outer GFRP circular pipe, an inner GFRP circular pipe and a self-compaction fine stone concrete layer, the outer GFRP circular pipe surrounds the inner GFRP circular pipe, an interlayer is arranged between the outer GFRP circular pipe and the inner GFRP circular pipe, the interlayer is filled with the self-compaction fine stone concrete layer, a plurality of anti-shearing connecting keys are uniformly distributed on the inner walls of the outer GFRP circular pipe and the inner GFRP circular pipe in the circumferential direction, the anti-shearing connecting keys on the inner walls of the outer GFRP circular pipe and the inner GFRP circular pipe are arranged in a staggered mode, bolt holes are formed in two end portions of the pipeline monomer respectively, and bolt holes penetrate through the outer GFRP circular pipe, the inner; the outer wall of the outer layer GFRP circular pipe is provided with an outer layer GFRP circular pipe reserved bolt hole; through integral nodal connection between two pipeline monomers, integral node is through the bolt hole connection of high strength bolt and two pipeline monomer tip, is equipped with concrete placement hole and exhaust hole on the integral node outer wall, concrete placement hole and exhaust hole interval distribution.

The integral node comprises an outer layer GFRP circular pipe, an inner layer GFRP circular pipe and a self-compaction fine stone concrete layer, the outer layer GFRP circular pipe is internally surrounded by the inner layer GFRP circular pipe, an interlayer is arranged between the outer layer GFRP circular pipe and the inner layer GFRP circular pipe and is filled with the self-compaction fine stone concrete layer, a plurality of shear connection keys are uniformly distributed on the inner walls of the outer layer GFRP circular pipe and the inner layer GFRP circular pipe in the circumferential direction, and the shear connection keys on the inner walls of the outer layer GFRP circular pipe and the inner layer GFRP circular pipe are arranged in a mutually staggered mode.

The outer diameter of the inner GFRP circular pipe of the integral node is equal to the inner diameter of the inner GFRP circular pipe of the pipeline monomer; the inner diameter of the outer layer GFRP circular pipe of the integral node is equal to the outer diameter of the outer layer GFRP circular pipe of the single pipeline.

And concrete pouring holes and exhaust holes are formed in the outer wall of the outer GFRP circular tube of the integral node and are distributed at intervals.

The single pipeline is a single pipe, and the section of the single pipeline is circular; the outer layer GFRP circular tube and the inner layer GFRP circular tube are seamless winding type GFRP circular tubes.

The pipeline is a double pipe and the section of the pipeline is circular.

The pipeline monomer is one of a linear pipeline monomer, a curved pipeline monomer or a crossing pipeline monomer.

The lateral surface of the pipeline monomer is horizontally and symmetrically provided with GFRP anti-buckling energy dissipation dampers, one ends of the GFRP anti-buckling energy dissipation dampers are connected with the outer wall of the pipeline monomer through claw-type connecting pieces, and the other ends of the GFRP anti-buckling energy dissipation dampers are hinged with the foundation; one end of the claw type connecting piece is provided with a circular ring and is hinged with the GFRP buckling-restrained energy dissipation damper, the other end of the claw type connecting piece is provided with a reserved bolt hole, and the reserved bolt hole is connected with a reserved bolt hole of an outer-layer GFRP circular tube through a high-strength bolt.

The two ends of the GFRP anti-buckling energy dissipation damper between the two pipelines are respectively hinged with one end of a claw type connecting piece, and the other end of the claw type connecting piece is respectively connected with the reserved bolt holes of the outer layer GFRP circular tube on the outer wall of the corresponding pipeline monomer through high-strength bolts.

The method comprises the following steps:

1) prefabricating a pipeline monomer in a factory, blanking an inner layer GFRP circular pipe and an outer layer GFRP circular pipe according to size requirements, arranging anti-shearing connecting keys on the outer side of the inner layer GFRP circular pipe and the inner side of the outer layer GFRP circular pipe, reserving bolt holes at two ends of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe, reserving the bolt holes on the outer layer GFRP circular pipe, connecting a claw type connecting piece with the outer layer GFRP circular pipe, concentrically and vertically placing the inner layer GFRP circular pipe in the outer layer GFRP circular pipe, screwing high-strength bolts at two ends, pouring a self-compacting fine stone concrete layer between the inner layer GFRP circular pipe and the outer layer GFRP circular pipe from top to bottom, loosening and repeatedly twisting the high-strength bolts after concrete is initially set to form bolt holes, and forming the pipeline monomer after maintenance;

2) prefabricating an inner layer GFRP circular pipe and an outer layer GFRP circular pipe for forming an integral node in a factory, arranging shear-resistant connecting keys on the outer side of the inner layer GFRP circular pipe and the inner side of the outer layer GFRP circular pipe according to a certain rule, reserving bolt holes at two end parts of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe, and reserving concrete pouring holes and exhaust holes at the top part of the outer layer GFRP circular pipe;

3) transporting the prefabricated pipeline monomer and the inner layer GFRP circular pipe and the outer layer GFRP circular pipe of the integral node to a site, arranging the pipeline monomer on site soil, arranging the pipeline monomers of the same section of the two pipelines in parallel side by side, then placing the inner layer GFRP circular pipe of the integral node into the outer layer GFRP circular pipe, concentrically inserting the two into the pipeline monomer, fixedly connecting the pipeline monomer and the integral node by using a high-strength bolt, then utilizing a concrete pump to pour the stirred self-compacting fine stone concrete into an interlayer of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe of the integral node through a concrete pouring hole, stopping pouring when the concrete at the exhaust hole overflows, and sequentially connecting the pipeline monomers through the integral node;

4) the GFRP anti-buckling energy dissipation damper is prefabricated in a factory and is installed on site, the GFRP anti-buckling energy dissipation damper is arranged between two combined pipelines, two ends of the GFRP anti-buckling energy dissipation damper are connected with claw type connecting pieces installed on outer layer GFRP circular pipes of single pipelines of the two pipelines through high-strength bolts in a hinged mode, then the GFRP anti-buckling energy dissipation damper is arranged between a foundation and the single pipelines, one end of the GFRP anti-buckling energy dissipation damper is connected with a circular ring of the claw type connecting pieces through the high-strength bolts, the other end of the GFRP anti-buckling energy dissipation damper is connected with the foundation in a hinged mode, the GFRP anti-buckling energy dissipation damper is arranged at a certain distance along the direction of the pipelines in the mode, and construction of an oil-gas multiphase conveying integrated.

The invention has the beneficial effects that:

1) the assembly type connection of the pipelines is realized by local cast-in-place concrete, the connection mode of the traditional pipelines is changed, the pipelines can have good long-term tightness and are durable, and the requirement of the design service life is met;

2) the pipeline section adopts a combined section form of GFRP and concrete, the mechanical properties of two materials are fully utilized, the bearing capacity and the stability of the pipeline are greatly improved, and the pipeline is suitable for a conveying pipeline with a large pipe diameter;

3) the GFRP buckling-restrained energy-dissipation damper is adopted, so that the fixing connection effect can be achieved, the energy-dissipation and shock-absorption effects can be achieved during an earthquake, and the anti-seismic performance of the pipeline is improved;

4) two pipelines are adopted to simultaneously convey media, so that the same medium can be conveyed, two media can be conveyed simultaneously, the conveying types are enriched, and the conveying efficiency is improved;

5) the adopted nonmetal GFRP circular tube material has high tensile strength, light weight, good construction manufacturability, good corrosion resistance, insensitivity to temperature change and good heat insulation, is convenient to be applied in high-stringency cold regions and saline-alkali regions, can convey liquid and gas which can not be conveyed by steel pipelines, and ensures the stability of conveying media;

6) the pipeline has strong applicability, can be arranged in a straight line, a curve and a crossing way, solves the problem of limitation of the traditional pipeline, can be buried underground or arranged on the ground, can be flexibly arranged aiming at complex terrains, and can avoid mountains, rivers and the like;

7) the inner surface of the pipeline is smooth, the resistance to the conveying medium is small, the deposited medium is relatively less, and the conveying efficiency of the pipeline can be greatly improved;

8) the single pipeline and the integral node can be prefabricated in a factory and installed on site, so that the construction period is greatly shortened;

9) the pipeline has good waterproof performance and strong freeze-thaw resistance in the underground complex environment, and can obviously improve the fatigue resistance of the pipeline.

Description of the drawings:

FIG. 1 is a view showing a structure of a pipe connection of a linear pipe cell according to the present invention;

FIG. 2 is a view showing a structure of a pipe connection of a single curved pipe according to the present invention;

FIG. 3 is a view showing a structure of a pipe connection of the crossing type pipe unit according to the present invention;

FIG. 4 is a cross-sectional view of a single tube of the present invention;

FIG. 5 is a cross-sectional view of a dual duct structure of the present invention;

FIG. 6 is a cross-sectional view of the connection and fixation of the single pipe body with the integral node of the un-poured concrete according to the present invention;

FIG. 7 is a sectional view of the pipe unit of the present invention attached to a cast concrete integral joint;

FIG. 8 is a schematic cross-sectional view of an outer GFRP tube of the integral node of the invention;

FIG. 9 is a schematic cross-sectional view of an outer GFRP tube of the integral node of the invention;

FIG. 10 is a schematic cross-sectional view of an inner GFRP tubular of the integral node of the invention;

FIG. 11 is a schematic cross-sectional view of an inner GFRP tubular of the integral node of the invention;

FIG. 12 is a schematic cross-sectional view of the connection of a single curved pipe and an integral joint according to the present invention;

FIG. 13 is a cross-sectional view of the cross-over type pipe monolith and integral node connection of the present invention;

FIG. 14 is a schematic view of the outer layer GFRP circular tube preformed bolt hole structure of the single pipe body of the invention;

FIG. 15 is a schematic view of the claw coupling of the present invention;

FIG. 16 is a cross-sectional view of the jaw connection of the present invention;

fig. 17 is a schematic view of the GFRP energy-dissipating buckling restraint of the present invention.

The specific implementation mode is as follows:

referring to the figures, an oil-gas multiphase transmission integrated flat cavity pipeline structure system and a construction method thereof are formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers 14, the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline single body 1 and an integral node 4, the pipeline single body 1 comprises an outer GFRP circular pipe 10, an inner GFRP circular pipe 11 and a self-compacting fine stone concrete layer 12, the inner portion of the outer GFRP circular pipe 10 surrounds the inner GFRP circular pipe 11, an interlayer is arranged between the outer GFRP circular pipe 10 and the inner GFRP circular pipe 11 and is filled with the self-compacting fine stone concrete layer 12, a plurality of shear-resistant connecting keys 5 are uniformly distributed on the inner walls of the outer GFRP circular pipe 10 and the inner GFRP circular pipe 11 in the circumferential direction, the shear-resistant connecting keys 5 on the inner walls of the outer GFRP circular pipe 10 and the inner GFRP circular pipe 11 are arranged in a staggered mode, bolt holes 6 are respectively arranged at two end portions, An inner GFRP circular pipe 11 and a self-compacting fine stone concrete layer 12; the outer wall of the outer layer GFRP circular pipe 10 is provided with an outer layer GFRP circular pipe reserved bolt hole 16; connect through integral node 4 between two pipeline monomers 1, integral node 4 is connected through the bolt hole 6 of high strength bolt 7 with two pipeline monomer 1 tip, is equipped with concrete placement hole 8 and exhaust hole 9 on the 4 outer walls of integral node, and concrete placement hole 8 and exhaust hole 9 interval distribution. The integral node 4 comprises an outer GFRP circular tube 10, an inner GFRP circular tube 11 and a self-compacting fine stone concrete layer 12, the outer GFRP circular tube 10 internally surrounds the inner GFRP circular tube 11, an interlayer is arranged between the outer GFRP circular tube 10 and the inner GFRP circular tube 11, the interlayer is filled with the self-compacting fine stone concrete layer 12, a plurality of shear connection keys 5 are uniformly distributed on the inner walls of the outer GFRP circular tube 10 and the inner GFRP circular tube 11 in the circumferential direction, and the shear connection keys 5 on the inner walls of the outer GFRP circular tube 10 and the inner GFRP circular tube 11 are arranged in a mutually staggered mode. The outer diameter of the inner GFRP circular tube 11 of the integral node 4 is equal to the inner diameter of the inner GFRP circular tube 11 of the pipeline monomer 1; the inner diameter of the outer GFRP circular tube 10 of the integral node 4 is equal to the outer diameter of the outer GFRP circular tube 10 of the single pipeline 1. Concrete pouring holes 8 and exhaust holes 9 are formed in the outer wall of the outer GFRP circular tube 10 of the integral node 4, and the concrete pouring holes 8 and the exhaust holes 9 are distributed at intervals. The single pipeline 1 is a single pipe with a circular section; the outer layer GFRP circular tube 10 and the inner layer GFRP circular tube 11 are seamless winding type GFRP circular tubes. The pipeline is a double pipe and the section of the pipeline is circular. The pipeline monomer 1 is one of a linear pipeline monomer, a curved pipeline monomer 2 or a crossing pipeline monomer 3. The lateral surface of the pipeline single body 1 is horizontally and symmetrically provided with GFRP anti-buckling energy-consumption dampers 14, one ends of the GFRP anti-buckling energy-consumption dampers 14 are connected with the outer wall of the pipeline single body 1 through claw type connecting pieces 13, and the other ends of the GFRP anti-buckling energy-consumption dampers 14 are hinged with a foundation 15. One end of the claw type connecting piece 13 is provided with a circular ring and is hinged with the GFRP buckling-restrained energy dissipation damper 14, the other end of the claw type connecting piece 13 is provided with a reserved bolt hole, and the reserved bolt hole is connected with the reserved bolt hole 10 of the outer layer GFRP circular pipe through the high-strength bolt 7. Two ends of a GFRP buckling-restrained energy-dissipation damper 14 between the two pipelines are respectively hinged with one end of a claw type connecting piece 13, and the other end of the claw type connecting piece 13 is respectively connected with an outer layer GFRP circular tube reserved bolt hole 16 of the outer wall of the corresponding pipeline single body 1 through a high-strength bolt 7.

The method comprises the following steps:

1) prefabricating a pipeline monomer 1 in a factory, blanking an inner layer GFRP circular pipe 11 and an outer layer GFRP circular pipe 10 according to size requirements, arranging shear-resistant connecting keys 5 on the outer side of the inner layer GFRP circular pipe 11 and the inner side of the outer layer GFRP circular pipe 10, reserving bolt holes 6 at two ends of the inner layer GFRP circular pipe 11 and the outer layer GFRP circular pipe 10, reserving bolt holes 16 in the outer layer GFRP circular pipe 10, connecting a claw-type connecting piece 13 with the outer layer GFRP circular pipe 10, concentrically and vertically placing the inner layer GFRP circular pipe 11 in the outer layer GFRP circular pipe 10, screwing high-strength bolts 7 at two ends, pouring a self-compacting fine stone concrete layer 12 between the inner layer GFRP circular pipe 11 and the outer layer GFRP circular pipe 10 from top to bottom, loosening and repeatedly twisting the high-strength bolts 7 after initial setting of concrete to form bolt holes 6, and forming the pipeline monomer 1 after maintenance;

2) prefabricating an inner layer GFRP circular pipe 11 and an outer layer GFRP circular pipe 10 for forming the integral node 4 in a factory, arranging shear-resistant connecting keys 5 on the outer side of the inner layer GFRP circular pipe 11 and the inner side of the outer layer GFRP circular pipe 10 according to a certain rule, reserving bolt holes 6 at two end parts of the inner layer GFRP circular pipe 11 and the outer layer GFRP circular pipe 10, and reserving a concrete pouring hole 8 and an exhaust hole 9 at the top part of the outer layer GFRP circular pipe 10;

3) transporting a prefabricated pipeline single body 1 and an inner GFRP circular pipe 11 and an outer GFRP circular pipe 11 of an integral node to the site, arranging the pipeline single body 1 on site soil, arranging the pipeline single bodies 1 of the same section of the two pipelines in parallel side by side, then placing the inner GFRP circular pipe 11 of the integral node 4 into the outer GFRP circular pipe 10, concentrically inserting the two pipes into the pipeline single body 1, fixedly connecting the pipeline single body 1 with the integral node 4 by using a high-strength bolt 7, then using a concrete pump to pour stirred self-compacting fine stone concrete into an interlayer of the inner GFRP circular pipe 11 and the outer GFRP circular pipe 10 of the integral node 4 through a concrete pouring hole 8, stopping pouring when concrete at an exhaust hole 9 overflows, and sequentially connecting the pipeline single bodies 1 through the integral node 4;

4) GFRP anti-buckling energy-consumption dampers 14 are prefabricated in a factory and installed on site, the GFRP anti-buckling energy-consumption dampers are arranged between two combined pipelines firstly, two ends of each GFRP anti-buckling energy-consumption damper 14 are connected with claw type connecting pieces 13 installed on outer GFRP circular tubes 10 of single pipelines 1 of the two pipelines through high-strength bolts 7 in a hinged mode, then the GFRP anti-buckling energy-consumption dampers 14 are arranged between a foundation 15 and the single pipelines 1, one ends of the GFRP anti-buckling energy-consumption dampers are connected with circular rings of the claw type connecting pieces 13 through the high-strength bolts 7, the other ends of the GFRP anti-buckling energy-consumption dampers are connected with the foundation 15 in a hinged mode, the GFRP anti-buckling energy-consumption dampers 14 are arranged at certain intervals along the direction of the pipelines in the above mode, and construction of an oil-gas conveying.

The pipe monomers are organically combined together through the formed integral node. The GFRP buckling restrained energy dissipation dampers are symmetrically arranged at intervals between the outer side of the pipeline and the pipeline, when the pipeline is disturbed by the outside and moves, the dampers can stop the pipeline from moving in real time, the energy of the pipeline is consumed, and the pipeline is prevented from being damaged. Meanwhile, one end of the claw type connecting piece is provided with a circular ring, a bolt hole is reserved in the other end of the claw type connecting piece, the claw type connecting piece is fixedly connected with the outer wall of the GFRP sandwich layer concrete combined pipeline through the high-strength bolt, and the damper can play a role in controlling the whole pipeline in real time when the pipeline vibrates.

The inner layer GFRP circular tube is concentrically and vertically placed in the outer layer GFRP circular tube, self-compacting fine stone concrete is poured from top to bottom, a single pipeline is formed, and connection with the integral node is facilitated.

The pipeline adopts integral nodal connection, fine assurance whole pipeline structure's leakproofness.

The GFRP anti-buckling energy dissipation damper is horizontally and symmetrically arranged on the side face of the pipeline, one end of the GFRP anti-buckling energy dissipation damper is connected with the pipeline through a claw type connecting piece, the other end of the GFRP anti-buckling energy dissipation damper is connected with a foundation, the connection mode is hinged, the damper can be guaranteed to only provide damping force, unnecessary restraint is not provided, the GFRP anti-buckling energy dissipation damper can play a role in connection and fixation, can play an energy dissipation and shock absorption role in the coming earthquake, and greatly improves the anti-seismic performance of the pipeline.

Arranging a GFRP anti-buckling energy-consuming damper between the two pipelines can play a role of mutual fixation. Two pipelines are adopted to convey media simultaneously, and the conveying efficiency of the media is greatly improved.

The single pipe body can be one of a straight pipe body, a curved pipe body or a crossing pipe body. The pipeline monomer can arrange in multiple forms, changes the direction of pipeline as required, can avoid complex topography such as mountain range and river, shortens construction cycle greatly.

The pipeline can adopt one or a combination of a plurality of forms of a straight pipeline monomer, a curved pipeline monomer or a crossing pipeline monomer.