CN109334682B - Light vacuum pipeline transportation system and construction method thereof - Google Patents
Light vacuum pipeline transportation system and construction method thereof Download PDFInfo
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- CN109334682B CN109334682B CN201811242826.3A CN201811242826A CN109334682B CN 109334682 B CN109334682 B CN 109334682B CN 201811242826 A CN201811242826 A CN 201811242826A CN 109334682 B CN109334682 B CN 109334682B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/10—Tunnel systems
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Abstract
The invention discloses a light vacuum pipeline transportation system, which comprises a vacuum pipeline (1) and a combined support fixing structure, wherein the bottom of the vacuum pipeline (1) is embedded into the combined support fixing structure, the combined support fixing structure comprises a U-shaped beam (2) and an inner base (6), the top of the U-shaped beam (2) is an arc-shaped groove, the bottom of the inner base (6) is an arc-shaped convex surface, the U-shaped beam (2) is matched with the inner base (6) so as to clamp the vacuum pipeline (1), the vacuum pipeline (1) comprises a rigidity reinforcing layer (102) and an outer layer pipe (103) made of light airtight and high-tensile-strength materials, and the rigidity reinforcing layer (102) is of a filled concrete structure so as to ensure the rigidity and strength of the vacuum pipeline (1). The invention discloses a construction method of a light vacuum pipeline transportation system. The middle pipeline has the advantages of light weight, convenient installation, good corrosion resistance, firm installation and high stability.
Description
Technical Field
The invention belongs to the technical field of vacuum pipeline transportation, and particularly relates to a light vacuum pipeline transportation system and a construction method thereof.
Background
The vacuum pipeline transportation concept was proposed by german institute of helman kenpel in 1922, and is a transport form without air resistance and friction. The technical principle is to build a closed pipeline on the ground or underground, and vacuum or partial vacuum is pumped by a vacuum pump. When the vehicle is driven in the environment, the driving resistance is greatly reduced, the energy consumption can be effectively reduced, and meanwhile, the pneumatic noise can be greatly reduced, so that the vehicle meets the environmental protection requirement. The research on vacuum pipeline transportation at home and abroad is relatively popular, but in the test stage, no operation item is landed yet, the built or under-built vacuum pipeline test line is of an overhead structure or a structure buried underground, and the vacuum tube is made of steel tubes, mainly because the steel tubes are good in stress performance, large in rigidity, small in deformation and good in sealing performance. However, the fixing device and the complexity thereof, the steel tube is a good choice for the vacuum tube, but the high cost, the large dead weight lead to the large engineering quantity when the vacuum tube is installed, the poor corrosion resistance lead to the short service life of the vacuum tube, the poor sealing performance and the like.
Vacuum pipes continue to develop, and lightweight vacuum pipes of carbon fibers have emerged in the prior art. Generally, a lightweight vacuum pipe refers to a vacuum pipe having a pipe density that is lower than the steel density of a steel vacuum pipe, and more preferably a vacuum pipe having a pipe density that is less than 1/3 of the steel density. For example, patent document CN108413139a discloses a carbon fiber vacuum pipeline, including pipeline skeleton and the pipeline covering with the pipeline skeleton cladding, fixed connection between pipeline covering and the pipeline skeleton, wherein, the pipeline covering is the shop floor that is formed by carbon fiber composite material wet winding, the pipeline skeleton is the frame body structure that titanium alloy material made, in the pipeline, be close to the bottom of the circular cross section of pipeline, set up with pipeline cross section perpendicular and along pipeline axial extension's pipeline bottom plate bearing structure, pipeline bottom plate bearing structure's upper surface and pipeline inner wall all fixed connection pipeline covering.
The existing light vacuum pipeline and the traffic system thereof can overcome the problems of larger weight, service life, large installation engineering quantity and the like of the steel pipe, but have larger defects: on one hand, the light pipeline is different from the vacuum pipeline made of steel materials, the steel materials are heavy in weight and can be fixed through fixing structures such as reinforced concrete, vibration and even shaking easily occur if the light pipeline is not well fixed, particularly, the running speed of a vehicle in the light pipeline is high, vibration and shaking are easier to cause or aggravate, and the hidden trouble is caused to the running safety of the whole traffic system; on the other hand, if the traditional mechanical fixing parts are adopted for fixing and supporting, the modes such as punching and perforating are usually involved, and the air tightness of the light vacuum pipeline can be influenced, so that the efficiency and the safety of the whole vacuum pipeline transportation system are influenced; the third aspect is that the existing light-weight pipeline has the advantage of light weight, but the rigidity and/or strength may be insufficient, and the existing fixed supporting mode also causes uneven stress of the pipeline and the supporting structure thereof, and the pressure-bearing tensile effect is poor.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a light vacuum pipeline transportation system and a construction method thereof, wherein a combined support fixing structure is formed by a U-shaped beam and an inner base matched with the U-shaped beam, a bottom pipe body of a vacuum pipeline is embedded in the combined support fixing structure to form good support for the light vacuum pipeline.
In order to achieve the above object, as one aspect of the present invention, there is provided a lightweight vacuum pipe transportation system including a vacuum pipe and a combination support fixture, a bottom of the vacuum pipe being embedded in the combination support fixture;
The combined support fixing structure comprises a U-shaped beam and an inner base, wherein the top of the U-shaped beam is an arc-shaped groove matched with the arc of the curved surface of the pipe wall of the vacuum pipe, the bottom of the inner base is an arc-shaped convex surface matched with the arc-shaped groove, the top of the inner base is provided with a track beam, the inner base is accommodated in the vacuum pipe, the arc-shaped convex surface at the bottom of the inner base is contacted with the inner pipe wall of the vacuum pipe, the arc-shaped groove of the U-shaped beam wraps the vacuum pipe from outside and supports the vacuum pipe, an adhesive layer for tightly connecting the outer pipe wall of the vacuum pipe with the arc-shaped groove is arranged between the outer pipe wall of the vacuum pipe and the arc-shaped groove, and the U-shaped beam is matched with the inner base from inside and outside to clamp the bottom of the light vacuum pipe in the combined support fixing structure;
And the vacuum pipeline comprises a rigidity reinforcing layer and an outer layer pipe, wherein the rigidity reinforcing layer is formed by overlapping the outer layer from inside to outside along the radial direction, and the outer layer pipe is made of light airtight materials, and the rigidity reinforcing layer is of a filled concrete structure so as to ensure the rigidity and the strength of the vacuum pipeline.
Further, the bottom of the U-shaped beam is horizontal, an included angle between the side face and the bottom face of the U-shaped beam is a right angle or an obtuse angle, and the bottom of the U-shaped beam is arranged on a pier or a semi-rigid ground or an underground structure.
Further, the top surface of the inner base is flush with the top surface of the U-shaped beam.
Further, the length of the arc-shaped groove of the U-shaped beam is 1/3-1/2 of the circumference of the vacuum pipeline.
Further, the U-shaped beam comprises a plurality of sections of U-shaped beam sections, and expansion joints are arranged between two adjacent sections of U-shaped beam sections.
Further, a support is arranged between the bridge pier and the U-shaped beam.
Further, a concrete or gravel cushion layer is arranged between the U-shaped steel beam and the semi-rigid ground or underground structure.
Further, an inner layer tube which is in contact matching with the inner base and serves as a vacuum pipeline protection layer is arranged on the inner side of the rigidity reinforcing layer.
Further, the rigidity reinforcing layer is made of expanded concrete or/and fiber concrete, and the inner layer pipe or the outer layer pipe is made of any one or more of bamboo winding materials, carbon fiber materials, resin steel fibers, basalt fibers, glass fibers and aluminum alloy materials.
As another aspect of the present invention, there is provided a construction method of a lightweight vacuum pipeline transportation system, comprising the steps of:
s1, manufacturing a vacuum pipeline and manufacturing a U-shaped beam with an arc-shaped groove at the top and a plane at the bottom;
Wherein, the inner layer pipe, the rigidity reinforcing layer and the outer layer pipe are manufactured into a vacuum pipeline together or the rigidity reinforcing layer and the outer layer pipe which are made of reinforced concrete are manufactured into the vacuum pipeline together;
s2, fixing the U-shaped beam on a pier or a semi-rigid ground or underground structure,
When the U-shaped beam is arranged on a semi-rigid ground or an underground structure, a concrete or broken stone cushion layer is arranged at the bottom of the U-shaped beam so as to increase the stability of the bottom of the U-shaped beam;
S3, arranging a bonding layer on the surface of the arc-shaped groove to ensure that the bonding layer is uniformly arranged along the cambered surface of the arc-shaped groove;
s4, installing the vacuum pipeline, attaching the vacuum pipeline to the bonding layer, and firmly fixing the vacuum pipeline in the arc-shaped groove through the bonding layer;
S5, an inner base is arranged in the vacuum pipeline, the bottom of the inner base is attached to the inner wall of the vacuum pipeline, the inner base is matched with the U-shaped beam to form a combined support fixing structure, the light vacuum pipeline is fixed in the combined support fixing structure, and the vacuum pipeline is vacuumized.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) According to the light vacuum pipeline transportation system, the U-shaped beam and the inner base matched with the U-shaped beam form a combined support fixing structure, the bottom of the vacuum pipeline is embedded in the combined support fixing structure, namely, the U-shaped beam is arranged between the arc-shaped groove at the top of the U-shaped beam and the arc-shaped convex surface of the inner base, the U-shaped beam is arranged on the outer side to provide upward support, the structure can simultaneously ensure that the stress of the pipe body is uniform, the requirements on the deformation aspect of the beam body can be met, the inner base can provide pressure for the vacuum pipeline under the action of dead weight and the gravity of the track beam, the vacuum pipeline is clamped in the fixed support structure under the action of the combined action of the inner base and the U-shaped beam, the vacuum pipeline is particularly suitable for the light vacuum pipeline system, so that the vacuum pipeline is uniformly stressed and prevented from shaking, the stability of the vacuum pipeline and the running safety of vehicles in the vacuum pipeline are ensured, the fixation of shaking prevention and vibration prevention are avoided through the action of inner layer extrusion and outer layer support, the fixation mode of destroying the air tightness is avoided, and the stress is uniform and the compression resistance and tensile resistance is good; in addition, the rigidity reinforcing layer is adopted in the vacuum pipeline, and the rigidity of the whole structure is ensured through the filled concrete structure.
(2) According to the light vacuum pipeline transportation system, the bonding layer is arranged between the arc-shaped groove and the vacuum pipeline, on one hand, firm connection is formed between the light vacuum pipeline and the U-shaped beam, and shaking and even falling of the arc-shaped groove are prevented; on the other hand, the buffer layer can serve as a buffer layer for buffering the impact, vibration and other influences when the vehicle runs.
(3) According to the light vacuum pipeline transportation system, the side face of the U-shaped beam is a vertical face or an inclined face, the included angle between the side face and the bottom face is a right angle or an obtuse angle so as to form a stable supporting structure, the cross section area of the top of the U-shaped beam is larger than or equal to that of the bottom, and the structural design can realize that the lifting support of the U-shaped beam can ensure uniform stress on one hand, and can reduce the load to ensure the bearing performance of the whole structure on the other hand; meanwhile, the design of the U-shaped beam can expand the application range of the vacuum pipeline, and the U-shaped beam can be arranged at different geographic positions, so that the applicability of the U-shaped beam is greatly improved.
(4) According to the light vacuum pipeline transportation system, the top surface of the inner base is flush with the top surface of the U-shaped beam, so that each position on the vacuum pipeline is extruded by the inner base and is matched with the corresponding support, the inner base and the U-shaped beam form fit, the optimal shaking prevention and vibration prevention effects and uniform stress effects are achieved, and uneven stress caused by excessive extrusion or shaking caused by lack of extrusion are prevented.
(5) According to the light vacuum pipeline transportation system, the length of the arc-shaped groove of the U-shaped beam is 1/3-1/2 of the circumference of the vacuum pipeline, the range can give consideration to the effects of preventing shaking and vibration caused by wrapping and supporting of the pipeline by the arc-shaped groove and the problem of bottom bearing caused by the weight of the U-shaped beam, when the length of the arc-shaped groove is smaller than 1/3, the wrapping is insufficient, shaking is obvious, the safety of the vacuum pipeline transportation system can be influenced, and when the length of the arc-shaped groove is larger than 1/3, the burden increasing degree of the part exceeding 1/2 is far greater than the shaking preventing effect increasing degree.
(6) The light vacuum pipeline transportation system is characterized in that the rigidity reinforcing layer is made of rigid materials and is made of expanded concrete, so that the rigidity reinforcing layer is tightly connected with the inner layer pipe and the outer layer pipe; the fiber concrete is adopted for improving the crack resistance of the concrete, the inner layer pipe and the outer layer pipe are made of bamboo winding materials, carbon fiber materials, resin steel fibers, basalt fibers, glass fibers and aluminum alloy materials, and the selected materials are fast in pipe construction, reliable in quality, low in preparation cost, small in volume weight, good in corrosion resistance, low in carbon and environment-friendly, and the defects that the steel pipe is high in manufacturing cost, large in weight, poor in corrosion resistance and the like when being used as a vacuum pipe can be well overcome.
(7) The construction method of the light vacuum pipeline transportation system comprises the steps of connecting an inner layer pipe and an outer layer pipe through a rigidity reinforcing layer to form a vacuum pipeline with strong rigidity and small deformation, fixing a U-shaped beam on a pier provided with a support, arranging an adhesive layer between the vacuum pipeline and the U-shaped beam to form a stable vacuum pipeline support, and finally forming a vacuum pipeline beam.
Drawings
FIG. 1 is a schematic view of a light vacuum piping traffic system according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a light vacuum piping system according to a second embodiment of the present invention;
FIG. 3 is a first embodiment of an enlarged view at A in FIG. 1;
Fig. 4 is a second embodiment of an enlarged view at a in fig. 1.
In all the figures, like numerals designate like structures or elements, wherein: 1-vacuum pipeline, 2-U-shaped beam, 3-bonding layer, 4-support, 5-pier, 6-inner base, 7-track beam, 8-train, 101-inner layer pipe, 102-rigidity reinforcing layer and 103-outer layer pipe.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a schematic structural diagram of a light-weight vacuum pipeline transportation system according to a first embodiment of the present invention. As shown in fig. 1, the lightweight vacuum pipeline transportation system comprises a vacuum pipeline 1, a U-shaped beam 2, an adhesive layer 3, a support 4, a bridge pier 5, an inner base 6 and a track beam 7;
wherein, the top of U type roof beam 2 is equipped with arc type recess, and the bottom surface is the horizontal plane, and vacuum pipe 1 locates the top of U type roof beam 2, sets up flange between two sections adjacent vacuum pipe 1, and in locating the arc recess of vacuum pipe 1 bottom, and the radian of arc recess is the same with the radian of vacuum tube 1 bottom for hold up the vacuum pipe roof beam through U type roof beam 2, provide stable support.
The U-shaped beam 2 is arranged along the rail direction in an extending way, the U-shaped beam 2 is used as a main vertical stress member to bear the dead weight of a structure, the dead weight of a pipeline and the dead weight and traffic load of traffic facilities in the pipeline, so that the deformation of the beam body and the like can meet the requirements; an expansion joint is arranged between two adjacent U-shaped beams 2, and a joint filling material is arranged in the expansion joint, wherein the U-shaped beams 2 are reinforced concrete or precast reinforced concrete members.
Preferably, the side surface of the U-shaped beam 2 is a vertical surface or an inclined surface, the included angle between the side surface and the bottom surface is a right angle or an obtuse angle, the cross section area of the top of the U-shaped beam is larger than or equal to the cross section area of the bottom of the U-shaped beam so as to form a stable supporting structure, and the arrangement mode of the U-shaped beam can realize the lifting and supporting of the U-shaped beam 2 of the vacuum pipeline to ensure that the vacuum pipeline and the U-shaped beam 2 are uniformly stressed, and reduce the weight of the U-shaped beam and the bearing of the bottom structure; meanwhile, the design can expand the application range of the vacuum pipeline, and the vacuum pipeline can be arranged at different geographic positions, so that the applicability of the vacuum pipeline is greatly improved.
Further, the U-beam 2 may be located in different geographical locations, i.e. the U-beam 2 may be located above the abutment 5, on a semi-rigid ground or buried below the ground; a support 4 is arranged between the U-shaped beam 2 and the abutment 5, so that the U-shaped beam 2 is fixed on the abutment 5 through the support 4, and the pressure of the U-shaped beam 2 is transmitted to the abutment 5 through the support 4 to provide stable support; when the U-shaped beam is arranged on a semi-rigid ground or buried below the ground, the bottom of the U-shaped beam 2 is provided with a concrete or crushed stone cushion layer so as to increase the stability of the bottom of the U-shaped beam 2.
The inner base 6 is arranged in the arc-shaped groove, the bottom of the inner base 6 is an arc-shaped convex surface, the top of the inner base 6 is horizontal, a track beam 7 is arranged on the horizontal top surface of the inner base 6, a train is arranged on the track beam 7, and the U-shaped beam 2 and the inner base 6 are matched and arranged to form a combined support fixing structure; the bottom of the vacuum pipeline 1 is embedded in the combined support fixing structure, the bottom of the vacuum pipeline 1 is arranged between the arc-shaped groove of the U-shaped beam 2 and the arc-shaped convex surface of the inner base 6, and the vacuum pipeline 1 is fixed on the combined support fixing structure through the cooperation of the U-shaped beam 2 and the inner base 6; the arc-shaped groove of the U-shaped beam 2 is matched with the radian of the vacuum pipeline 1 and is used for providing supporting force support for the vacuum pipeline 1, the arc-shaped groove is in surface-to-surface contact with the vacuum pipeline and provides uniform support for the pipeline, meanwhile, the stress of the U-shaped beam 2 is uniform, the stability of a supporting structure is ensured, the service life of the supporting structure is prolonged, in addition, the design of the arc-shaped groove can overcome transverse shaking of the vacuum pipeline, and the stability of the vacuum pipeline and the running safety of vehicles in the vacuum pipeline are ensured; the inner base 6 is placed in the vacuum pipe, the weight of the inner base 6 plus the weight of the rail beam 7 provides a downward pressure in the vacuum pipe which cooperates with the supporting force of the arc-shaped groove to clamp the vacuum pipe 1 in the combined support and fixing structure to fix the light vacuum pipe in the combined support and fixing structure. The combined action of the inner base 6 and the U-shaped beam can also be used for improving the tensile property of the light vacuum pipeline transportation system. The combined supporting structure is particularly suitable for supporting and fixing a light vacuum pipeline, and has good anti-shaking and anti-vibration effects, good pressure-bearing effect, uniform stress and small damage to the vacuum pipeline 1; on the other hand, the vacuum pipeline is clamped only through the combined action of the inner base 6 and the U-shaped beam 2, and the vacuum pipeline is fixed through punching without additional mechanical fixing parts, so that the air tightness of the vacuum environment of the vacuum pipeline is ensured.
Preferably, the length of the arc-shaped groove of the U-shaped beam 2 is 1/3-1/2 of the circumference of the vacuum pipeline 1, the support of the arc-shaped groove on the vacuum pipeline 1 is affected by the arrangement of the length of the arc-shaped groove, the longer the length is, the larger the volume gravity of the arc-shaped groove is, and the larger the load of the bottom structure of the arc-shaped groove is; however, the shorter the length is, the smaller the wrapping rate of the vacuum pipeline 1 is, the poorer the supporting effect on the vacuum pipeline is, and the poorer the effect of preventing the vacuum pipeline from shaking is; when the length of the arc-shaped groove of the U-shaped beam 2 is 1/3-1/2 of the circumference of the vacuum pipeline 1, the U-shaped beam 2 wraps the pipeline sufficiently to restrain the vibration of the pipeline and provides sufficient support, and when the length of the arc-shaped groove of the U-shaped beam 2 is less than 1/3 of the circumference of the vacuum pipeline 1, the vibration restraining effect is suddenly reduced and the safety requirement is not met sufficiently; when the length of the arc-shaped groove of the U-shaped beam 2 is larger than 1/2 of the circumference of the vacuum pipeline, the shaking prevention effect on the wrapping of the vacuum pipeline reaches a safe enough range, and the burden increasing degree of the part exceeding 1/2 is far larger than the shaking prevention effect increasing degree.
Further, the top surface of the inner base 6 is flush with the top surface of the U-shaped beam 2, the weight of the inner base 6 plus the weight of the rail beam on the top thereof provides downward pressure for the vacuum pipe 1, and the inner base and the upper support of the U-shaped beam 2 form inner and outer coordination to clamp the vacuum pipe 1 in the combined fixed support structure, and when the top surface of the inner base 6 is flush with the top surface of the U-shaped beam 2, the arc grooves of the U-shaped beam are matched with the corresponding inner base 6 in all positions for supporting the vacuum pipe 1. If the top surface of the inner base 6 is lower than the top surface of the U-shaped beam 2, only one section of the vacuum pipeline 1 corresponding to the U-shaped beam 2 has no pressure effect, and the effect of vibration and shaking prevention caused by extrusion is lost; if the height of the top surface of the inner base is higher than that of the top surface of the U-shaped beam 2, a part of the vacuum pipeline 1 is stressed, the supporting forces are not counteracted, the load acts on the vacuum pipeline 1, and the damage to the vacuum pipeline 1 is serious.
Preferably, the inner base 6 and the U-beam 2 are made of plain concrete or reinforced concrete.
As a second embodiment of the present invention, as shown in fig. 2, when the inner base 6 and the U-shaped beam 2 are made of reinforced concrete, the inner base 6 and the U-shaped beam 2 are hollow structures, the bottom of the U-shaped beam 2 is hollow, and a hollow portion is provided in the inner base 6 to reduce the weight of the U-shaped beam 2, to reduce the pressure on the pier 5, the semi-rigid ground or the underground structure, and to save resources.
Preferably, an adhesive layer 3 is arranged between the vacuum pipeline 1 and the arc-shaped groove of the U-shaped beam 2, is used for overcoming the unevenness of the surface of the vacuum pipeline 1, is matched with the combined support fixing structure, prevents the vacuum pipeline 1 from shaking, and enables the vacuum pipeline 1 and the arc-shaped groove to be tightly adhered to form a structure which is commonly deformed under common stress.
Further, the adhesive layer 3 is made of a polymer material such as rubber, asphalt, resin, etc.
Fig. 3 is a first embodiment of an enlarged view at a in fig. 1. As shown in fig. 1, the first embodiment of the vacuum pipe 1 includes an inner layer pipe 101, a rigidity reinforcing layer 102 and an outer layer pipe 103, wherein the inner layer pipe 101 is the innermost layer structure of the vacuum pipe 1, and is a protective layer, and the inner layer pipe 101 is made of a material with high tensile strength and is used for ensuring the strength of the inner surface of the vacuum pipe; and the inner wall of the vacuum pipeline 1 contacts with the bottom of the inner base 6, and is loaded by the inner base 6, and the inner layer pipe 101 is used for providing protection support for the vacuum pipeline 1 and guaranteeing the structural integrity of the vacuum pipeline 1. Preferably, the inner tube 101 is made of bamboo wrapping material, carbon fiber material, resin steel fiber, basalt fiber, glass fiber and aluminum alloy material, so that the weight of the pipeline is reduced and the structural integrity is ensured.
The outer layer tube 103 is an outer layer structure of the vacuum pipeline 1, plays a role of an airtight layer and a protective layer, and the outer layer tube 103 is made of a material which is airtight and high in tensile strength, preferably, the outer layer tube 103 is made of an airtight bamboo winding material, a carbon fiber material or an aluminum alloy material, so that the weight of the pipeline is reduced, the air tightness inside the vacuum pipeline is ensured, and meanwhile, the structural integrity is ensured. The materials selected by the inner layer pipe 101 and the outer layer pipe 103 are used for manufacturing the pipeline, so that the pipeline has the characteristics of quick construction, reliable quality, low preparation cost, small volume weight, good corrosion resistance, low carbon and environment friendliness, and the defects of high manufacturing cost, large weight, poor corrosion resistance and the like of the steel pipe used as a vacuum pipeline can be overcome.
The rigidity reinforcing layer 102 is filled between the inner layer pipe 101 and the outer layer pipe 103, the rigidity reinforcing layer 102 is of a filled concrete structure, and the rigidity reinforcing layer 102 is used for providing rigidity and strength for the vacuum pipeline and preventing the pipeline from cracking, deforming and damaging.
Further, the rigidity reinforcing layer 102 is made of expanded concrete or fiber concrete, and the tight connection between the rigidity reinforcing layer 102 and the inner layer bamboo winding composite pipe 101 and the outer layer bamboo winding composite pipe 103 can be enhanced and ensured after filling and expansion by adopting the expanded concrete; after filling with fiber concrete as the stiffness enhancing layer 102, crack resistance of the concrete can be improved.
Fig. 4 is a second embodiment of an enlarged view at a in fig. 1. In this embodiment, the vacuum pipe 1 includes an outer layer pipe 103 and a rigidity reinforcing layer 102, wherein the rigidity reinforcing layer 102 is made of reinforced concrete to ensure the integrity of the inner layer structure of the vacuum pipe 1. The inner base layer 6 is directly arranged on the rigidity reinforcing layer 102, and the outer layer tube 103 is made of a gas-proof bamboo winding material, a carbon fiber material or an aluminum alloy material, so that the weight of the pipeline is reduced, the gas tightness inside the vacuum pipeline is ensured, and meanwhile, the structural integrity is ensured.
Further, an insulation layer is arranged on the outer layer of the outer layer tube 103, so that the inner environment of the vacuum pipeline is not influenced by the external temperature.
Preferably, a plurality of vacuum pipeline beams are connected together to form a vacuum pipeline circuit, the ends of the two ends of the circuit are closed, and an anti-collision air bag, an anti-collision spring or other anti-collision measures are arranged at the ends in the pipeline. An openable and closable cabin door is arranged at the side of the vacuum pipeline close to the platform in the station. Meanwhile, a plurality of vacuum pumps are arranged at certain intervals along the circuit, so that the vacuum pipeline can be ensured to be pumped to a vacuum or low-pressure state.
A construction method of a light vacuum pipeline transportation system comprises the following steps:
S1, manufacturing a vacuum pipeline 1, and manufacturing a U-shaped beam 2 so that the top of the U-shaped beam is an arc-shaped groove and the bottom of the U-shaped beam is a horizontal plane;
The inner layer pipe 101, the rigidity reinforcing layer 102 and the outer layer pipe 103 are manufactured into a vacuum pipeline 1 together or the rigidity reinforcing layer 102 and the outer layer pipe 103 which are made of reinforced concrete are manufactured into a vacuum pipeline;
Further, expansion joints are arranged among the joints of the U-shaped beam 2, and joint filling materials are adopted for plugging the joints.
S2, fixing the U-shaped beam 2 on the bridge pier 5, the semi-rigid ground or the underground structure,
When the U-shaped beam 2 is fixed on the bridge pier 5, a support 4,U is arranged between the U-shaped beam and the bridge pier 5, and the U-shaped beam 2 is arranged on a semi-rigid ground or an underground structure, a concrete or crushed stone cushion layer is arranged at the bottom of the U-shaped beam 2, so that the stability of the bottom of the U-shaped beam 2 is improved.
S3, arranging an adhesive layer 5 on the surface of the arc-shaped groove, and ensuring that the adhesive layer 5 is uniformly arranged along the cambered surface of the arc-shaped groove;
s4, installing a vacuum pipeline 1, attaching the vacuum pipeline 1 to the bonding layer 5, and firmly fixing the vacuum pipeline 1 in the arc-shaped groove through the bonding layer 5;
Further, the mounting flange connects the vacuum pipes 1 in the line direction;
S5, an inner base 6 is arranged in the vacuum pipeline 1, the bottom of the inner base 6 is attached to the inner wall of the vacuum pipeline 1, the inner base 6 is matched with the U-shaped beam 2 to form a combined support fixing structure, the light vacuum pipeline 1 is fixed in the combined support fixing structure, and the vacuum pipe is vacuumized.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. The light vacuum pipeline transportation system is characterized by comprising a vacuum pipeline (1) and a combined support and fixation structure, wherein the bottom of the vacuum pipeline (1) is embedded into the combined support and fixation structure;
The combined support fixing structure comprises a U-shaped beam (2) and an inner base (6), wherein the top of the U-shaped beam (2) is an arc-shaped groove matched with the arc of the pipe wall curved surface of the vacuum pipe (1), the bottom of the inner base (6) is an arc-shaped protruding surface matched with the arc-shaped groove, the top of the inner base is provided with a track beam (7), the inner base (6) is accommodated in the vacuum pipe (1), the arc-shaped protruding surface at the bottom of the inner base is contacted with the inner pipe wall of the vacuum pipe (1), the arc-shaped groove of the U-shaped beam (2) wraps and supports the vacuum pipe (1) from outside, a bonding layer (3) used for tightly connecting the outer pipe wall of the vacuum pipe (1) and the arc-shaped groove is arranged between the outer pipe wall of the vacuum pipe (1) and the arc-shaped groove, and the bottom of the vacuum pipe (1) is clamped in the combined support fixing structure by the inner and outer matching of the U-shaped beam (2);
The vacuum pipeline (1) comprises a rigidity reinforcing layer (102) and an outer layer pipe (103) which are overlapped from inside to outside along the radial direction, wherein the rigidity reinforcing layer (102) is of a filled concrete structure so as to ensure the rigidity and the strength of the vacuum pipeline (1);
the bottom of the U-shaped beam (2) is horizontal, an included angle between the side surface and the bottom surface of the U-shaped beam (2) is a right angle or an obtuse angle, and the bottom of the U-shaped beam is arranged on a bridge pier (5) or a semi-rigid ground or an underground structure;
the top surface of the inner base (6) is flush with the top surface of the U-shaped beam (2);
The length of the arc-shaped groove of the U-shaped beam (2) is 1/3-1/2 of the circumference of the vacuum pipeline (1);
The U-shaped beam (2) comprises a plurality of sections of U-shaped beam sections, and expansion joints are arranged between two adjacent sections of U-shaped beam sections;
an inner pipe (101) which is in contact matching with the inner base (6) and serves as a vacuum pipeline protection layer is arranged on the inner side of the rigidity reinforcing layer (102).
2. A lightweight vacuum pipeline transportation system as claimed in claim 1, wherein a support (4) is provided between the bridge pier (5) and the U-beam (2).
3. A lightweight vacuum pipeline transportation system as claimed in claim 1, wherein a concrete or gravel blanket is provided between the U-beam (2) and the semi-rigid ground or underground structure.
4. A lightweight vacuum pipe transportation system as claimed in claim 1, wherein the stiffness enhancing layer (102) is made of expanded concrete or/and fibre concrete, and the inner layer pipe (101) or the outer layer pipe (103) is made of any one or more of bamboo wound material, carbon fibre material, resin steel fibre, basalt fibre, glass fibre and aluminium alloy material.
5. A construction method of a lightweight vacuum pipeline transportation system according to any one of claims 1 to 4, comprising the steps of:
S1, manufacturing a vacuum pipeline (1) and manufacturing a U-shaped beam (2) with an arc-shaped groove at the top and a plane at the bottom;
Wherein, the inner layer tube (101), the rigidity reinforcing layer (102) and the outer layer tube (103) are manufactured into a vacuum pipeline (1) together or the rigidity reinforcing layer (102) and the outer layer tube (103) which are made of reinforced concrete are manufactured into a vacuum pipeline;
S2, fixing the U-shaped beam (2) on a pier (5) or a semi-rigid ground or underground structure,
When the U-shaped beam (2) is fixed on the bridge pier (5), a support (4) is arranged between the U-shaped beam (2) and the bridge pier (5), and when the U-shaped beam (2) is arranged on a semi-rigid ground or an underground structure, a concrete or gravel cushion layer is arranged at the bottom of the U-shaped beam (2) so as to increase the stability of the bottom of the U-shaped beam (2);
s3, arranging a bonding layer (3) on the surface of the arc-shaped groove to ensure that the bonding layer (3) is uniformly arranged along the cambered surface of the arc-shaped groove;
S4, installing the vacuum pipeline (1), attaching the vacuum pipeline (1) to the bonding layer (3), and firmly fixing the vacuum pipeline (1) in the arc-shaped groove through the bonding layer (3);
S5, an inner base (6) is arranged in the vacuum pipeline (1), the bottom of the inner base (6) is attached to the inner wall of the vacuum pipeline (1), the inner base (6) is matched with the U-shaped beam (2) to form a combined support fixing structure, the light vacuum pipeline (1) is fixed in the combined support fixing structure, and the vacuum pipeline is vacuumized.
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| CN201811242826.3A CN109334682B (en) | 2018-10-24 | 2018-10-24 | Light vacuum pipeline transportation system and construction method thereof |
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| CN110341727A (en) * | 2019-05-31 | 2019-10-18 | 衡水益通管业股份有限公司 | Rectangle communications and transportation vacuum tunnel |
| CN110307999B (en) * | 2019-06-28 | 2021-05-18 | 盾构及掘进技术国家重点实验室 | Low-vacuum pipeline experimental device for magnetic suspension transportation |
| CN113152168A (en) * | 2020-01-07 | 2021-07-23 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | U-shaped double-line vacuum pipeline beam |
| CN112709250A (en) * | 2020-12-24 | 2021-04-27 | 西京学院 | Be favorable to reducing seabed vacuum pipeline pile foundation cushion cap structure of buoyancy |
| CN112709251A (en) * | 2020-12-24 | 2021-04-27 | 西京学院 | Integral type seabed vacuum pipeline pile foundation cushion cap structure |
| CN112878373B (en) * | 2021-01-19 | 2022-06-07 | 西京学院 | Pre-tension submarine vacuum pipeline structure and stretching method thereof |
| CN113771638A (en) * | 2021-09-14 | 2021-12-10 | 北京交通大学 | Multi-stage anti-floating dust method for concrete members in low vacuum-atmospheric pressure alternating environment |
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