CN115492017A - Method and device for setting urban rail transit evacuation near-rail sound barrier - Google Patents
Method and device for setting urban rail transit evacuation near-rail sound barrier Download PDFInfo
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- CN115492017A CN115492017A CN202211172826.7A CN202211172826A CN115492017A CN 115492017 A CN115492017 A CN 115492017A CN 202211172826 A CN202211172826 A CN 202211172826A CN 115492017 A CN115492017 A CN 115492017A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0023—Details, e.g. foundations
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
Abstract
A method and a device for arranging an urban rail transit evacuation near-rail sound barrier are characterized in that a two-in-one continuous wall supporting structure with evacuation function and a sound barrier is arranged on a continuous wall of urban rail transit at the height position of the bottom surface of a carriage in a close manner, the upper surface of the continuous wall supporting structure is an evacuation platform, and a prefabricated integral support is arranged below the evacuation platform; the inner face of the integral support is a whole sound-absorbing arc face with a sound barrier effect, and a near-rail sound barrier is formed between urban rail transit sections through the whole sound-absorbing arc face, so that the evacuation function of urban rail transit is guaranteed, and the effect of the near-rail sound barrier is achieved. The invention utilizes the two-in-one evacuation near-rail sound barrier, can realize personnel evacuation, and simultaneously absorbs near-rail noise on two sides of a train, effectively reduces noise in the train and improves the comfort of passengers.
Description
Technical Field
The invention relates to a method and a device for noise reduction and noise reduction, in particular to a method and a device for setting a near-rail sound barrier for urban rail transit evacuation; the method and the device for setting the urban rail transit evacuation near-rail sound barrier can effectively reduce the influence of near-rail noise in urban rail transit on passengers in a carriage, and improve the riding comfort; belongs to the technical field of sound insulation and noise reduction.
Background
Urban rail transit is a vehicle transportation system that adopts a rail structure to carry out bearing and guiding. According to the requirements of urban traffic general planning, a fully-closed or partially-closed special track line is arranged, and the urban rail transit is generally called as a public transit mode for transporting passenger flow of a certain scale in a train or single-car mode. The urban rail transit vehicle has the advantages of large transportation capacity, high speed, safety, punctuality, low cost, energy conservation, comfortable and convenient riding, capability of relieving ground traffic congestion, contribution to environmental protection and the like, is often called as 'green traffic', and can be used as an important transportation tool to be activated in various cities along with the development of urbanization construction.
However, because urban rail transit still uses wheel-rail walking as a main mode of transportation, noise of wheel-rail vehicle walking is certainly present in urban rail transit, and because urban rail transit mainly walks in cities, the urban environment is certainly influenced, so that a fully-closed or partially-closed special rail line is generally adopted to avoid noise pollution to cities at present, so that noise of vehicle running is digested in a closed rail, the noise is certainly transmitted to the interior of a carriage to influence passengers in the vehicle, particularly in a fully-closed line segment, because of limited space, the wheel-rail noise is reflected by a closed wall to increase the transmission of sound, so that the noise in the vehicle is increased and exceeded, but a proper sound barrier cannot be installed beside a track bed, and the wheel-rail noise always troubles the passengers in the vehicle, and needs to be improved.
The search through inquiry is used for finding the same technical report, only technical literatures in related fields are provided, and the most similar technical reports are formed by the following steps:
the query retrieval does not find the same technical report, and only the technical literature in the related field is most closely represented by the following items:
1. the patent number is CN202120858866.1, the name is "a sound barrier mounting structure of existing track traffic route", applicant is the utility model patent application of the fourth reconnaissance design institute group limited company of medium-speed railway, and this patent application discloses a sound barrier mounting structure of existing track traffic route, including installing in the two sets of line side sound barriers of the track traffic route left and right sides, every group line side sound barrier is installed on the railing bottom plate of corresponding side and is located the near line side of corresponding side railing. The sound barrier mounting structure of existing track traffic route that this patent provided installs line side sound barrier on railing bottom plate and is located the nearly line side of corresponding side railing, under the prerequisite that satisfies the boundary limit requirement, makes line side sound barrier be close to the track as far as possible, can absorb wheel rail noise effectively, under the condition that satisfies the requirement of making an uproar, reduces the height of line side sound barrier correspondingly to reduce the sound barrier load. However, the two sets of sound barriers at the line side provided by the structure occupy larger space positions, and are not suitable for closed urban rail transit, and the actual test is not very good in silencing effect on rails.
2. The patent number is CN202110258409.3, entitled as "closed urban rail sound barrier", the applicant is the invention patent application of Chongqing traffic profession institute, this patent application discloses a closed urban rail sound barrier, including the traffic track, the traffic track traffic both sides are equipped with the base fixed on the ground, the base is fixedly connected with the slide rail, the slide rail is perpendicular to the traffic track, the slide rail is connected with the base in a sliding way, the base is fixed with the pushing cylinder used for pushing and sliding with the base; the base is fixedly connected with vertical barriers, transverse barriers are arranged between the vertical barriers and comprise horizontal barriers, sliding grooves which are horizontally arranged are formed in two sides of each horizontal barrier, connecting barriers are connected in the sliding grooves in a sliding mode, and the connecting barriers are fixedly connected to the top ends of the corresponding vertical barriers respectively; two symmetrical control cylinders are arranged on the traffic track, and stress blocks are arranged at the top ends of the control cylinders. The patent proposes a closed sound barrier for urban rails, but the proposed technical scheme is considered by changing the whole rail, and the feasibility of changing the existing rail structure by light is doubtful no matter what the effect is, and the closed sound barrier for urban rails does not have practicability.
3. The patent number is CN201710820283.8, which is named as a zigzag type sound barrier suitable for a straddle type monorail, the applicant is the invention patent application of Chongqing traffic university, the patent application discloses a zigzag type sound barrier suitable for a straddle type monorail, the zigzag type sound barrier comprises a prefabricated rigid frame and a zigzag sound insulation plate, and a sound absorption material is arranged on the sound insulation plate; the prefabricated rigid frame is of a zigzag structure filled with sound absorption materials, the zigzag structure comprises a horizontal section and an inclined section, the horizontal section is installed on the supporting beam and connected with the track beam through a connecting piece, and the inclined section extends outwards relative to the track beam; the zigzag sound insulation plate is arranged on one surface of the inclined section, which faces the track beam. The patent does provide a near-rail type sound barrier, but the proposed technical scheme is mainly arranged below the side of the rail beam, and the main influence of noise is noise which is radiated upwards on the contact surface of the wheel and the rail, and the patent does not effectively prevent the noise radiated upwards, so the sound barrier effect is not ideal.
Although the above patents relate to the sound barrier method and apparatus for urban rail transit, the above patent technologies still do not substantially solve the problem that the effect of the existing wheel-track noise on the closed urban rail transit line on the inside of the car is not ideal, and thus the above-mentioned problem still exists, so it is necessary to improve the above problem.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings mentioned in the background technology and provide a novel bamboo core composite material manufacturing method and a bamboo core composite material product. The bamboo core composite material manufacturing method and the bamboo core composite material product can greatly improve the bonding capacity of the bamboo core layer and the high polymer material layer, so that the performance of the bamboo core composite material is improved.
The invention is mainly realized by the following technical scheme: a method for setting an urban rail transit evacuation near-rail sound barrier comprises the steps that a two-in-one continuous wall supporting structure with evacuation functions and a sound barrier is arranged on a continuous wall of the urban rail transit at the height position of the bottom surface of a carriage in a close manner, the upper surface of the continuous wall supporting structure is an evacuation platform, and a prefabricated integral support is arranged below the evacuation platform; the inner face of the integral support is a whole sound-absorbing arc face with a sound barrier effect, and a near-rail sound barrier is formed between urban rail transit sections through the whole sound-absorbing arc face, so that the evacuation function of urban rail transit is guaranteed, and the effect of the near-rail sound barrier is achieved.
Further, inhale the sound cambered surface through whole and form the nearly rail sound barrier between urban rail transit interval and adopt high-strength hard haydite combined material to make the monolith support through prefabricated mode, the upper surface of monolith support forms evacuation platform for the plane, the lateral surface of monolith support is the side board that matches with urban rail transit basis wall, the evacuation platform of monolith support and side inboard face are interior sound-absorbing curved surface, and the evacuation platform of monolith support and the triangle-shaped region that side board and medial surface formed are provided with inhales the sound cavity, inhale the sound jointly with the internal sound-absorbing cavity of monolith support through the interior sound-absorbing curved surface of medial surface, form nearly rail sound barrier.
Furthermore, the high-strength hard ceramsite composite material is a porous sound-absorbing composite material formed by compounding a high-strength porous ceramsite base material with a sound-absorbing function and a high polymer material which is an adhesive and a filling material.
Further, the high-strength porous ceramsite comprises porous sound-absorbing ceramic particles or porous ceramsite with sound-absorbing effect; the polymer material comprises a natural polymer material or a synthetic polymer material.
Furthermore, the high-strength porous ceramsite is porous ceramic particles with the fineness of 50-200 microns, and the pore diameter is 5-10 microns; the high polymer material is an epoxy resin composite material; the ratio of the porous ceramic particles to the epoxy resin composite material is 100:20-30, and stirring, mixing and prefabricating to form the high-strength hard ceramsite composite material taking the porous ceramic as the matrix.
Further, the interior sound absorption curved surface form the arcwall face of a secondary curve form at the evacuation platform of whole support and side inboard face, the point of rail and wheel contact is passed through at the curvature radius center of arcwall face, through inhaling the sound and the reflection elimination nearly rail noise of arcwall face, and the evacuation platform of whole support and the triangle-shaped region that side panel and medial surface formed are provided with inhales the sound cavity, inhale the sound jointly with the internal sound cavity of inhaling of whole support through the interior sound absorption curved surface of medial surface, form nearly rail sound barrier.
Further, the two-in-one continuous wall supporting structure with the evacuation function and the sound barrier is arranged by being pressed close to the lower bottom surface of the outer compartment shell of the urban railway vehicle, and the two-in-one continuous wall supporting structure with the evacuation function and the sound barrier is arranged by extending downwards by taking the side surface of the outer compartment shell of the urban railway vehicle as a farthest point: the height of the evacuation platform surface is within 50mm from top to bottom of the lower bottom surface of the outer box shell of the urban rail vehicle; the outermost end position of the evacuation platform is 100-150mm away from the side surface of the outer housing of the urban rail vehicle.
The utility model provides an urban rail transit evacuation near-rail sound barrier device, evacuation near-rail sound barrier device includes evacuation mesa, is holistic support under the evacuation mesa, and the side of whole support be the side board that urban rail transit road wall matches, the inner face of evacuation mesa and side board be the interior sound absorption curved surface of cambered surface form.
Further, the monolith support make the monolith support for high-strength hard haydite combined material through prefabricated mode, the upper surface of monolith support is sparse platform, the lower part of monolith support supports the part for inhaling the sound, the side board for supporting that the monolith support lower part is close to the wall, the medial surface of sparse platform below and side board is interior sound-absorbing curved surface, and the sparse platform of monolith support is provided with the sound-absorbing cavity with the triangle-shaped region that side board and medial surface formed, the sound is inhaled jointly with the sound-absorbing cavity of monolith support internal sound-absorbing curved surface through the medial surface, improve near-orbit sound barrier effect.
Furthermore, the high-strength hard ceramsite composite material is a porous sound-absorbing composite material formed by compounding a high-strength porous ceramsite base material with a sound-absorbing function and a high polymer material by using a bonding and filling material.
Furthermore, the side panel of the integral support is provided with a fixing hole, and the integral support is fixed on the wall beside the track by the fixing anchor and the fixing steel plate which are matched to penetrate through the fixing hole on the side panel.
Further, the side panel comprises a straight plate structure vertical to the ground or a curved plate structure matched with the round tunnel of the vehicle.
Furthermore, the cambered inner sound absorption curved surface is a quadratic curve-shaped cambered surface, the center of the curvature radius of the cambered surface passes through the contact point of the steel rail and the wheel, and near-rail noise is eliminated through sound absorption and reflection of the cambered surface to form a near-rail sound barrier; the quadric curved arc surface comprises a quadric surface formed by combining a straight line segment and an arc line segment.
The invention has the beneficial effects that:
the invention utilizes the two-in-one continuous wall supporting structure which is made of materials such as high-strength hard ceramsite and has the evacuation function and the sound barrier, organically combines the evacuation platform and the sound barrier, and simultaneously has the personnel evacuation function and the sound barrier function. By installing the structure on two sides of the urban rail transit section, people can be evacuated, the near-rail noise on two sides of a train can be absorbed, the noise in the train can be effectively reduced, and the comfort of passengers can be improved. Has the following advantages:
1. the invention combines the evacuation platform and the sound barrier, effectively utilizes the support of the evacuation platform to form the sound barrier, obtains the effect of combining the two into one, and can greatly simplify the structures respectively arranged by the evacuation platform and the sound barrier; the existing sound barrier is usually set independently, and is rarely arranged close to the rail, mainly considering the safety problem, worrying about the influence of the sound barrier device on the vehicle operation; the inventor finds that the running speed of urban rail transit is 60-80 KM/h in practice, and the main noise source is the noise generated by the contact of wheels and steel rails, so the noise generated by the wheels and the steel rails must be processed for noise suppression, and the most effective means is to arrange a near-rail sound barrier; the existing evacuation platform is generally used for passengers to walk during escape, the problem of sound barrier cannot be generally considered, and only a walking platform is formed on a common bracket; the height of the platform is found to be close to the height of a carriage door by on-site research, if the platform with the height is used for sound barrier treatment, the effect of realizing an evacuation platform can be obtained in time, and meanwhile, the sound barrier effect of treating noise in the running process of a vehicle can be achieved, so that the two-in-one effect can be well realized.
2. According to the invention, the near-rail sound barrier is arranged close to the rail, so that noise sources generated by the wheel rail can be effectively collected, the noise is prevented from being diffused, and the sound absorption effect is good; because the sound barrier is arranged at the lower part of the evacuation platform, the height position of the evacuation platform is equal to the height of the carriage, and the noise source generated by the wheels can be completely covered without being far away from the carriage only by controlling the height of the platform surface of the evacuation platform on the bottom surface of the carriage when the sound barrier is considered, the noise source generated by the wheel rail system can be controlled within the range below the minimum bottom of the carriage to the maximum extent; thus, the height of the sound barrier is reduced, and the attraction effect is better than that of the conventional sound barrier arranged on the side surface of the carriage.
3. According to the invention, the arc-shaped surface is skillfully utilized to absorb sound, and the centers of the curvature radii of the arc-shaped surface are all directed to the wheel rail contact points, so that the noise source generated by the wheel rail can be effectively absorbed, a certain reflection effect is formed, and the sound barrier effect is effectively improved; according to the analysis of the inventor, the noise sources are all noise generated by the contact friction or vibration of the wheel and the steel rail, the noise is transmitted in a radiation mode through the contact point of the wheel and the steel rail, therefore, the sound absorption effect can be effectively improved by adopting the curved surface to absorb the sound and directing the curvature center of the curved surface to the contact point of the wheel and the steel rail.
4. The continuous wall supporting structure is made of high-strength hard ceramic particles and other materials, a sound barrier effect is formed through ceramic micropores, and meanwhile, high-strength sound absorption and sound barrier effects are formed through bonding of high polymer materials with ceramic particles; the inventor finds in research that it is very suitable to use porous ceramic particles as sound-absorbing material, especially to control the ceramic particles to be porous ceramic particles with a particle size of 50-200 microns, the pore size is 5-10 microns, the sound-absorbing effect is best, and the sound-absorbing material is used, and a good integral bracket with sound-absorbing effect is prefabricated by a small amount of polymer resin material, because the ratio of the porous ceramic particles to the epoxy resin composite material is controlled to be 100:20-30, thus forming the high-strength and high-wear-resistance high-strength hard ceramsite sound-absorbing composite material taking the porous ceramic as the matrix.
5. The sound absorption cavity is arranged in the integral support frame, so that the sound absorption effect can be better achieved, and the sound absorption cavity forms deceleration after a noise source penetrates through the curved plate and enters the cavity, so that the effect of further rapid sound attenuation is achieved; the cavity is arranged in the integral support body, and the sound barrier arrangement mode for improving the sound absorption effect is found through experiments, and originally, a simple flat plate structure is generally adopted as a sound barrier, so that sound absorption through the cavity is not considered, but the structure of the integral support determines that a thicker area is arranged in a triangular area formed by the evacuation platform of the integral support and the side panel and the inner side surface, and the cavity is originally arranged for reducing weight.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention in a circular enclosed space;
FIG. 2 is a schematic structural view of the integral support of the circular enclosed space of the present invention;
FIG. 3 is a schematic diagram showing the position relationship of the integral support of the circular enclosed space according to the present invention;
FIG. 4 is a schematic view of the connection structure between evacuation platforms via a fixed steel plate according to the present invention;
fig. 5 is a schematic top view of the evacuation platform of the present invention;
FIG. 6 is a schematic structural view of a fixed steel plate according to the present invention;
FIG. 7 is a schematic view of a tie-down anchor according to the present invention;
fig. 8 is a schematic view of the overall structure of the square enclosed space according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The invention can be seen from the attached drawings, and mainly relates to a method for setting a sound barrier close to an urban rail transit evacuation, which is characterized in that a two-in-one continuous wall supporting structure with an evacuation function and a sound barrier is arranged on a closed continuous wall of the urban rail transit at the height position of the bottom surface of a carriage, the upper surface of the continuous wall supporting structure is an evacuation platform, and a prefabricated integral support is arranged below the evacuation platform; the inner face of monolith support inhales the sound cambered surface for the whole that has the sound barrier effect, inhales the sound cambered surface through whole and forms near-rail sound barrier between urban rail transit, both ensured urban rail transit sparse function, plays the effect of near-rail sound barrier simultaneously again.
The sound barrier structure comprises a curved plate structure and a straight plate structure, wherein the curved plate structure is suitable for a circular closed urban rail transit space; the straight plate structure is suitable for square closed urban rail transit passages. The following is described in conjunction with the accompanying drawings, respectively:
example one
The utility model provides a circular closed urban rail transit's sparse nearly rail sound barrier setting method, in circular closed urban rail transit passageway, along circular closed urban rail transit passageway's inner wall 1, set up two unification continuous wall bearing structure 2 that have sparse function and sound barrier, continuous wall bearing structure 2 for the whole strip-shaped frame of prefabricated shaping of materials such as high-strength hard haydite, the upper surface of continuous wall bearing structure 2 is evacuation platform 3, is whole support 4 below evacuation platform 3, whole support 4 combines to fix on closed urban rail transit passageway's inner wall 1 through fixing anchor bolt 5 and fixed steel sheet 6. The upper part of the integral support 4 is an upper plane 8 integrated with the evacuation platform 3, the side surface of the integral support 4 is an arc-shaped side surface 7 matched with the inner wall 1 of the closed urban rail transit passage, a curve-shaped inner sound absorption curved surface 11 is connected between the outermost end point 9 of the upper plane 8 and the lowermost end point 10 of the arc-shaped side surface 7, and noise generated by the wheel track is silenced through the inner curve surface.
The inner sound absorption curved surface 11 is a curved surface formed by combining a straight line segment 12 and a quadratic curve 13, and the center 14 of the curvature radius of the quadratic curve 13 is the contact point of the wheel and the steel rail; this allows the inner sound-absorbing curved surface 11 to effectively absorb noise emitted from the contact of the wheel with the rail, and to form a radioactive enclosure around the center of the source of the noise. Can effectively improve the sound barrier effect like this through experimental, because the noise source that the wheel rail sent all is produced with the friction or vibrations between wheel and the rail contact point to be radioactive and disperse, if the sound barrier can be according to the characteristics of dispersing of noise source, on the contrary set up the sound face of inhaling that surrounds the noise source center, just can furthest noise absorption, can not absorb the reflection that the part can provide relative noise source, offset some noises, consequently effectively provide sound absorbing effect. The quadric surface is a surface which can be calculated by a conventional method, and can be easily obtained by combining the outermost end point 9 and the lowermost end point 10 of the integral support by taking the contact point of the wheel and the steel rail as a curvature center. The straight line segment 12 of the inner sound-absorbing curved surface 11 is a transition line segment which is arranged on the lower portion of the whole support except for the quadratic curve 13 and is used for ensuring that the outermost end point 9 of the upper plane 8 is connected with the lowermost end point 10 of the arc-shaped side surface 7, and the transition line segment forms a support for the whole support in a gradually thickening mode. The straight line segment 12 and the quadratic curve 13 meet in a tangential manner.
The integral support can be used as a sound barrier, and besides the inner curved surface is used for absorbing noise, the integral support is also made of a high-strength hard ceramsite composite material with high sound absorption performance, the high-strength hard ceramsite composite material is made of a ceramic particle main body material and a composite material which takes polymer resin as bonding and filling materials through prefabrication forming, and the prefabrication forming comprises compression molding or extrusion molding. The ceramic particles are selected to be 50-200 microns in particle size through tests, and porous ceramic particles with the particle size of 5-10 microns in the ceramic are more suitable as main materials; the surface area of the particles formed by too large particles is reduced, so that the sound absorption effect is reduced, gaps among the particles are enlarged, and the gaps need to be filled with high polymer materials, so that the sound absorption effect is not improved; too small a manufacturing difficulty increases, the cost is too high, and the method is not economical. The high polymer resin material is proper epoxy resin material, and the epoxy resin and the ceramic particles are stirred uniformly and then preformed to form the long-strip-shaped integral bracket. The ratio of the porous ceramic particles to the epoxy resin composite material is 100:20-30 and can be added with proper amount of conventional auxiliary agents.
In order to improve the sound absorption effect and reduce the weight of the whole support, a sound absorption cavity 15 is arranged in the whole support 4 under the condition of ensuring the strength of the whole support 4, and the sound absorption cavity 15 is transversely arranged in the main body of the whole support 4 and is positioned in a triangular area formed by an upper plane 8, an arc-shaped side surface 7 and an inner sound absorption curved surface 11 of the section of the whole support 4; the shape of the sound-absorbing cavity 15 includes a polygonal shape or a circular shape, and the circular shape includes a perfect circle and an elliptical shape. The sound absorption cavity 15 can be a single cavity or a combination of a plurality of cavities, and the size of the cavity is based on the structural strength of the integral bracket 4, wherein the larger the size is, the better the size is; preferably, a single oval cavity is used, which is simple and practical. The internal sound absorption curved surface 11 of the inner side surface and the sound absorption cavity 15 in the whole support body absorb sound together, the sound barrier effect with different effects is formed, and the near-orbit sound barrier effect can be effectively improved.
In order to ensure the sound absorption effect, the sound barrier should be as close to the noise source as possible, and for this reason the continuous wall support structure 2 is arranged with the bottom surface of the vehicle compartment as the standard height and as close to the contact position of the wheel track as possible; use bottom surface under the urban rail vehicle outer box shell as position height to rail vehicle outer box shell side is the farthest point, down extends to set up two unification continuous wall bearing structure that have sparse function and sound barrier: repeated research shows that the height of the evacuation platform is within 50mm from top to bottom of the lower bottom surface of the outer box shell of the urban rail vehicle; the outermost end position of the evacuation platform is most suitably 100-150mm from the side of the outer shell of the urban rail vehicle.
For the convenience of walking, an evacuation walking handrail 16 is further arranged on the inner wall 1 of the closed urban rail transit passage, and the evacuation walking handrail 16 is rod-shaped and is arranged along the inner wall 1.
Example two
The sound barrier arrangement of the second embodiment is basically the same as the first embodiment except that the lower side 207 of the support structure 202 of the continuous wall is a vertical structure (as shown in fig. 2); the method for setting the square closed urban rail transit evacuation near-rail sound barrier comprises the steps of setting a two-in-one continuous wall supporting structure 202 with an evacuation function and a sound barrier along the inner wall 201 of a circular closed urban rail transit passage in the circular closed urban rail transit passage, wherein the continuous wall supporting structure 202 is an integral strip-shaped frame which is integrally prefabricated and formed by materials such as high-strength hard ceramsite and the like, the upper surface of the continuous wall supporting structure 202 is an evacuation platform 203, an integral support 204 is arranged below the evacuation platform 203, and the integral support 204 is fixed on the inner wall 201 of the closed urban rail transit passage through the combination of a fixing anchor bolt and a fixing steel plate. The upper part of the integral support 204 is an upper plane 208 integrated with the evacuation platform 203, the side surface of the integral support 204 is a vertical side surface 207 matched with the inner wall 201 of the closed urban rail transit passage, a curved inner sound absorption curved surface 211 is connected between the outermost end point 209 of the upper plane 208 and the lowermost end point 210 of the vertical side surface 207, and the noise generated by the wheel track is silenced through the inner curved surface.
It should be noted that, the above listed embodiments are only for clearly and completely describing the technical solution of the present invention with reference to the attached drawings; it should be understood that the embodiments described are only a part of the embodiments of the present invention, and not all embodiments, and the terms such as "upper", "lower", "front", "back", "middle", etc. used in this specification are for clarity of description only, and are not intended to limit the scope of the invention, which can be implemented, and the changes or modifications of the relative relationship thereof are also regarded as the scope of the invention without substantial technical changes. Meanwhile, the structures, the proportions, the sizes, and the like shown in the drawings are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, changes in proportion relation, or adjustments of the sizes, can still fall within the range covered by the technical contents disclosed in the present invention without affecting the effects and the achievable purposes of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention has the beneficial effects that:
the invention utilizes the two-in-one continuous wall supporting structure which is made of materials such as high-strength hard ceramic particles and has the evacuation function and the sound barrier, organically combines the evacuation platform and the sound barrier, and has the personnel evacuation function and the sound barrier function. Through installing this structure in city track traffic interval both sides, can realize personnel's evacuation to absorb train both sides approach rail noise simultaneously, effectively reduce the interior noise of car, improve passenger's travelling comfort. Has the following advantages:
1. the invention combines the evacuation platform and the sound barrier, effectively utilizes the bracket of the evacuation platform to form the sound barrier, obtains the effect of combining the two into one, and can greatly simplify the structures of the two which are respectively arranged; the existing sound barrier is usually set up independently, and is rarely set up close to the rail, mainly considering the safety problem, worrying about the influence of the sound barrier device on the vehicle operation; the inventor finds that the running speed of urban rail transit is 60-80 KM/h in practice, and the main noise source is the noise generated by the contact of wheels and steel rails, so the noise generated by the wheels and the steel rails must be processed for noise suppression, and the most effective means is to arrange a near-rail sound barrier; the existing evacuation platform is generally used for passengers to walk during escape, the problem of sound barrier is generally not considered, and only a walking platform is formed on a common bracket; people can find that the height of the platform is close to the height of a carriage door through field research, if the platform with the height is used for sound barrier treatment, the effect of realizing an evacuation platform can be obtained in time, and meanwhile, the sound barrier effect of treating noise in the running process of a vehicle can be achieved, so that a two-in-one effect can be well realized.
2. According to the invention, the near-rail sound barrier is arranged close to the rail, so that noise sources generated by the wheel rail can be effectively collected, the noise is prevented from being diffused, and the sound absorption effect is good; because the sound barrier is arranged at the lower part of the evacuation platform, the height position of the evacuation platform is equal to the height of the carriage, and the noise source generated by the wheels can be completely covered without being far away from the carriage only by controlling the height of the platform surface of the evacuation platform on the bottom surface of the carriage when the sound barrier is considered, the noise source generated by the wheel rail system can be controlled within the range below the minimum bottom of the carriage to the maximum extent; thus, the height of the sound barrier is reduced, and the attraction effect is better than that of the conventional sound barrier arranged on the side surface of the carriage.
3. According to the invention, the arc-shaped surface is skillfully utilized to absorb sound, and the centers of the curvature radii of the arc-shaped surface are all directed to the wheel rail contact points, so that the noise source generated by the wheel rail can be effectively absorbed, a certain reflection effect is formed, and the sound barrier effect is effectively improved; according to the analysis of the inventor, the noise sources are all noise generated by the contact friction or vibration of the wheel and the steel rail, the noise is transmitted in a radiation mode through the contact point of the wheel and the steel rail, therefore, the sound absorption effect can be effectively improved by adopting the curved surface to absorb the sound and directing the curvature center of the curved surface to the contact point of the wheel and the steel rail.
4. The continuous wall supporting structure is made of high-strength hard ceramic particles and other materials, a sound barrier effect is formed through ceramic micropores, and meanwhile, high-strength sound absorption and sound barrier effects are formed through bonding of high polymer materials with ceramic particles; the inventor finds in research that it is very suitable to use porous ceramic particles as sound-absorbing material, especially to control the ceramic particles to be porous ceramic particles with particle size of 50-200 microns, the pore size is 5-10 microns, the sound-absorbing effect is best, and by using such sound-absorbing material and prefabricating a good integral bracket with sound-absorbing effect through a small amount of polymer resin material, because the ratio of the porous ceramic particles to the epoxy resin composite material is controlled to be 100:20 to 30, thus forming the high-strength and high-wear-resistance high-strength hard ceramsite sound-absorbing composite material taking the porous ceramic as the matrix.
5. The sound-absorbing cavity is arranged in the integral support frame, so that the sound-absorbing cavity can better play a role in silencing, and a noise source penetrates through the curved plate and enters the cavity to form deceleration so as to achieve the effect of further and fast silencing; the cavity is arranged in the integral support body, and the sound barrier arrangement mode for improving the sound absorption effect is found through experiments, and originally, a simple flat plate structure is generally adopted as the sound barrier, so that sound absorption through the cavity is not considered yet.
Claims (10)
1. A method for setting an urban rail transit evacuation near-rail sound barrier is characterized by comprising the following steps: on the continuous wall of the urban rail transit, a two-in-one continuous wall supporting structure with an evacuation function and a sound barrier is arranged at the height position of the bottom surface of a carriage in a close manner, the upper surface of the continuous wall supporting structure is an evacuation platform, and a prefabricated integral support is arranged below the evacuation platform; the inner face of monolith support inhales the sound cambered surface for the whole that has the sound barrier effect, inhales the sound cambered surface through whole and forms near-rail sound barrier between urban rail transit, both ensured urban rail transit sparse function, plays the effect of near-rail sound barrier simultaneously again.
2. The method for setting sound barrier near the rail in urban rail transit evacuation as claimed in claim 1, wherein: the whole sound-absorbing cambered surface is used for forming the near-rail sound barrier between urban rail transit sections, the whole support is made of a high-strength hard ceramsite composite material in a prefabricated mode, the upper surface of the whole support is a plane to form an evacuation platform, the outer side surface of the whole support is a side panel matched with the urban rail transit foundation wall surface, the evacuation platform and the inner side surface of the side panel of the whole support are inner sound-absorbing curved surfaces, and the near-rail sound barrier is formed by absorbing near-rail noise through the inner sound-absorbing curved surfaces.
3. The method for setting sound barrier near the rail in urban rail transit evacuation as claimed in claim 2, wherein: the high-strength hard ceramsite composite material is a porous sound-absorbing composite material formed by compounding a high-strength porous ceramsite base material with a sound-absorbing function and a high polymer material by using bonding and filling materials.
4. The urban rail transit evacuation near-rail sound barrier setting method according to claim 3, characterized in that: the high-strength porous ceramsite comprises porous sound-absorbing ceramic particles or porous ceramsite with sound-absorbing effect; the high polymer material comprises a natural high polymer material or a synthetic high polymer material.
5. The method for setting sound barrier near the rail in urban rail transit evacuation as claimed in claim 4, wherein: the high-strength porous ceramsite is porous ceramic particles with the fineness of 50-200 microns, and the pore diameter is 5-10 microns; the high polymer material is an epoxy resin composite material; the ratio of the porous ceramic particles to the epoxy resin composite material is 100:20-30, and stirring, mixing and prefabricating to form the high-strength hard ceramsite composite material taking the porous ceramic as the matrix.
6. The urban rail transit evacuation near-rail sound barrier setting method according to claim 2, characterized in that: the interior sound absorption curved surface form the arcwall face of a secondary curve form at the evacuation platform of monolith support and side inboard face, the point of rail and wheel contact is passed through at the curvature radius center of arcwall face, through inhaling the sound and the reflection elimination nearly rail noise of arcwall face, and the evacuation platform of monolith support and the triangle-shaped region that side board and medial surface formed are provided with inhales the sound cavity, inhale the sound cavity jointly with the internal sound cavity of inhaling of monolith support through the interior sound absorption curved surface of medial surface, form nearly rail sound barrier.
7. The urban rail transit evacuation near-rail sound barrier setting method according to claim 1, characterized by comprising: the two unification continuous wall bearing structure that the setting of pressing close to have sparse function and sound barrier be with bottom surface under the outer railway carriage or compartment shell of city rail vehicle as position height to railway vehicle outer railway carriage or compartment shell side is the farthest point, down extends to set up two unification continuous wall bearing structure that have sparse function and sound barrier: the height of the evacuation platform surface is within 50mm from top to bottom of the lower bottom surface of the outer box shell of the urban rail vehicle; the outermost end position of the evacuation platform is 100-150mm away from the side surface of the outer box shell of the urban railway vehicle.
8. The sound barrier device for urban rail transit evacuation near-rail according to claim 1, wherein: the evacuation near-rail sound barrier device comprises an evacuation table top, wherein an integral support is arranged below the evacuation table top, the side face of the integral support is a side panel matched with the wall surface of the urban rail transit road, and the inner faces of the evacuation table top and the side panel are inner sound absorption curved surfaces in an arc surface shape.
9. The urban rail transit evacuation near-rail sound barrier device of claim 8, wherein: the utility model discloses a high-strength hard haydite composite material, including the integral support, the integral support be whole support of prefabricated mode preparation for high-strength hard haydite composite material, the upper surface of integral support is sparse platform, the lower part of integral support supports the part for inhaling the sound, the integral support lower part is close to the side board for supporting of clinging to the wall, the medial surface of sparse platform below and side board is interior sound absorption curved surface, and the sparse platform of integral support is provided with the triangle-shaped region that side board and medial surface formed and inhales the sound cavity, the sound cavity is inhaled jointly with the internal sound absorption cavity of integral support to interior sound absorption curved surface through the medial surface, form nearly rail sound barrier.
10. The urban rail transit evacuation near-rail sound barrier device of claim 9, wherein: the high-strength hard ceramsite composite material is a porous sound-absorbing composite material formed by compounding a high-strength porous ceramsite base material with a sound-absorbing function and a high polymer material by bonding and filling materials.
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