CN210561504U - Perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam - Google Patents
Perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam Download PDFInfo
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- CN210561504U CN210561504U CN201920485563.2U CN201920485563U CN210561504U CN 210561504 U CN210561504 U CN 210561504U CN 201920485563 U CN201920485563 U CN 201920485563U CN 210561504 U CN210561504 U CN 210561504U
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Abstract
The utility model discloses a trompil steel sheet shear force key formula roof beam rail integration low-speed magnetism floats track roof beam in, including concrete beam (1) along the track direction setting, this track roof beam still includes F rail (2) that the symmetry located this concrete beam (1) both sides, and locates steel-concrete built-up connection spare between concrete beam (1) and F rail (2), this steel-concrete built-up connection spare include I-shaped short beam bottom plate (6), I-shaped short beam roof (7) and I-shaped short beam web (9), this steel-concrete built-up connection spare with concrete beam (1) pours and forms a body structure, and F rail (2) and this steel-concrete built-up connection spare pass through bolt (3) and realize being connected, constitute roof beam-rail integration low-speed magnetism floats track roof beam in. The utility model discloses a reinforced concrete built-up connection spare realizes that the integration of track and bridge is connected, and the structure is simpler, has effectively reduced the structure height from rail surface to bridge floor, need not to reserve the bearing rail platform reinforcing bar at the bridge roof, and construction process is simple.
Description
Technical Field
The utility model belongs to the technical field of magnetic levitation track traffic, more specifically relates to a trompil steel sheet shear force key formula roof beam rail integration medium-low speed magnetic levitation track roof beam.
Background
The medium-low speed magnetic levitation transportation is a novel rail transportation mode which is optimized and innovated on the basis of the traditional railway technology after the traditional railway technology is developed for more than one hundred years. The medium-low speed magnetic levitation traffic has the advantages of low noise, low vibration, low radiation, low cost, strong climbing capability, small turning radius and the like, not only saves a large amount of land resources, but also provides a new choice for the development of urban traffic, which is safe, reliable, energy-saving and environment-friendly, and is a new development direction in the field of urban traffic. In recent years, great results are obtained in theoretical research and engineering application of medium-low speed magnetic levitation transportation at home and abroad, and important technical support is provided for promoting the application of the medium-low speed magnetic levitation transportation.
At present, a medium-low speed magnetic levitation track beam comprises a bridge structure and a track structure, as shown in fig. 1 and 2, an F-shaped track 2 is installed on a steel cross beam 10 through a fastener, the steel cross beam 10 is connected with a bearing platform 10 through a support, and the bearing platform 10 is connected with a concrete beam 1, so that the magnetic levitation track beam structure is formed. The low-speed magnetic suspension bridge in the prior art has a plurality of problems: (1) the height of the track structure is large, the structure height is increased on a bridge and a roadbed, the section of the tunnel is increased in the tunnel, the load acting distance between the track and the beam is increased, and particularly under the condition that the curve is ultrahigh as shown in fig. 2, the support structure not only transmits the gravity load of a vehicle and the track, but also bears the action of transverse shearing force, so that faults are easily generated between a steel cross beam and a bearing platform and between an F rail and a fastener, and the safety and the reliability of the track beam structure are influenced; (2) the track structure is complex in structure, comprises an F track, a steel cross beam, a fastener, a track bearing platform and a mechanical connecting device thereof, and has high installation difficulty and high manufacturing cost; (3) the second-stage load of the track structure is large, so that the engineering quantity of the bridge structure is large; (4) when the bridge structure is designed, the rigidity and the strength provided by the track structure are not generally considered, and materials are wasted; (5) the F rail is positioned on a steel cross beam support with larger intervals, and under the action of vehicle load, the F rail generates continuous vertical bending deformation to cause short wave irregularity of a rail surface.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides a trompil steel sheet shear force key formula beam rail integration medium-low speed magnetism floats track roof beam realizes that the integration of track and bridge is connected through steel-concrete built-up connection spare, and the structural configuration is simpler, has effectively reduced the structure height from rail surface to bridge floor, and the work progress still less need not to reserve the bearing rail platform reinforcing bar at the bridge roof, and construction process is simpler, also makes engineering cost lower simultaneously.
In order to realize above-mentioned purpose, the utility model provides a low-speed magnetism floats track roof beam in trompil steel sheet shear force key formula beam rail integration, including the concrete beam who sets up along track direction, this track roof beam still includes:
f rails symmetrically arranged on two sides of the concrete beam; and the number of the first and second groups,
the steel-concrete combined connecting piece is arranged between the concrete beam and the F rail and comprises an I-shaped short beam bottom plate, an I-shaped short beam top plate and an I-shaped short beam web plate, wherein the I-shaped short beam bottom plate, the I-shaped short beam top plate and the I-shaped short beam web plate are mutually vertical to form an I-shaped short beam structure;
the steel-concrete combined connecting piece and the concrete beam are poured to form an integral structure, and the F rail is connected with the steel-concrete combined connecting piece through bolts to form the beam-rail integrated medium-low speed magnetic levitation track beam.
Furthermore, a plurality of second shear nails are arranged on the top plate of the I-shaped short cross beam, the second shear nails are uniformly distributed on the top plate of the I-shaped short cross beam, the top end of each second shear nail is fixedly connected with the top plate of the I-shaped short cross beam, and the bottom end of each second shear nail is embedded in the concrete beam.
Furthermore, a plurality of first shear nails are arranged on the H-shaped short beam bottom plate, and the first shear nails are uniformly distributed on the H-shaped short beam bottom plate and are pre-embedded in the concrete beam.
Furthermore, the structural shape of the web plate of the I-shaped short beam is an inverted trapezoidal structure according to the stress condition, the top of the web plate is wider, and the bottom of the web plate is narrower, so that the connection area of the top plate of the I-shaped short beam and the web plate of the I-shaped short beam is increased.
Further, be equipped with the circular port on the I-shaped short crossbeam web, the longitudinal bridge in the concrete beam passes to the reinforcing bar from this circular port, forms trompil steel sheet shear force key, and the diameter of this circular port is greater than the diameter of reinforcing bar.
Furthermore, a height-adjusting base plate is arranged between the F rail and the top plate of the I-shaped short cross beam, and the height-adjusting base plate is different in thickness so as to adjust the height of the rail surface.
Furthermore, the steel-concrete combined connecting pieces are arranged in pairs, and a pair of steel-concrete combined connecting pieces is arranged at intervals along the direction of the bridge.
Further, bolt holes are formed in the F rail and the top plate of the I-shaped short cross beam, the bolt holes are circular, long circular or irregular square and round, and the hole diameter of each bolt hole is slightly larger than the diameter of each bolt so as to adjust the gauge of the F rail.
Furthermore, the lower edge of the top plate of the I-shaped short cross beam is closely attached to the top plate of the concrete beam, or the upper edge of the top plate of the I-shaped short cross beam is aligned to the upper edge of the top plate of the concrete beam.
Further, the cross section of the concrete beam is an I-shaped cross section, a T-shaped cross section or a trapezoidal cross section.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
1. the utility model discloses a roof beam-rail integrated configuration realizes through the steel-concrete built-up connection spare that the integration of track and bridge is connected, and the structure is simpler, has effectively reduced the structure height from rail surface to bridge floor, and the work procedure still less, need not to reserve the bearing rail platform reinforcing bar at the bridge roof, and construction process is simpler, also makes engineering cost lower simultaneously.
2. The utility model discloses a direct and bridge construction of I-shaped short beam structure through pre-buried in concrete beam of F rail is even as an organic whole, forms steel-concrete composite structure, and the bridge is even as an organic whole with the track, makes up the atress, and structural stress performance is better.
3. The utility model discloses a roof beam-rail integrated configuration, I-shaped short crossbeam roof, web and bottom plate welding constitute the steel construction to pour in concrete beam 1 in advance and form steel-concrete built-up connection spare, fixed connection is realized with the concrete beam through this steel-concrete built-up connection spare to the F rail, and the vertical deformation that the F rail produced under the vehicle load effect is littleer, and the F rail anchor bolt also can undertake bigger horizontal shear force simultaneously, and the atress performance of structure is better, and the track ride comfort is better.
4. The utility model discloses a roof beam-rail integrated configuration, I-shaped short crossbeam web 9's structural shape is decided according to its atress condition, preferably fall trapezium structure, the top broad, with increase I-shaped short crossbeam roof and I-shaped short crossbeam web connection area, improve pulling or the pressure load capacity that it bore the F rail, I-shaped short crossbeam bottom plate is narrower relatively, it is pre-buried in the concrete beam, and integrative pouring shaping, form the pulling force to I-shaped short crossbeam roof through I-shaped short crossbeam web, with the supporting F rail, guarantee the force-receiving stability of its structure.
5. The utility model discloses a roof beam-rail integral structure all is equipped with a plurality of shear force nails on I-shaped short crossbeam roof and the bottom plate, and this shear force nail is pre-buried in the concrete beam, strengthens the reliability of being connected between I-shaped short crossbeam and the concrete beam, ensures magnetic levitation rail train operation's security and stability.
6. The utility model discloses a roof beam-rail integral structure sets up between F rail and the steel sheet and increases the backing plate, increases the backing plate and is used for adjusting the track ride comfort, increases the backing plate and can make different thickness in order to adapt to the needs of adjustment rail face elevation.
7. The utility model discloses well low-speed magnetic levitation track roof beam with roof beam-rail integral structure compares with prior art, has cancelled components such as steel crossbeam, fastener, plummer and support, makes the structure simpler, has effectively reduced the structure height from rail surface to bridge floor, and the work progress still less need not to reserve the plummer reinforcing bar at the bridge roof, and construction process is simpler, also makes the engineering cost lower simultaneously.
8. The utility model discloses a roof beam-rail integrated structure, trompil steel sheet shear force key formula beam rail integration well low-speed magnetism floats the track roof beam and both can be used for conventional simple beam, continuous beam, the preceding simple beam in back of supporting, also can arrange in on the bridge floor of various macroscopical continuous beam, arched bridge, cable-stay bridge, suspension bridge as the support rail girder construction.
Drawings
FIG. 1 is a cross-sectional view of a layout of a medium-low speed magnetic levitation bridge and a track in the prior art (when a bridge plane is on a straight line);
FIG. 2 is a cross-sectional view of the arrangement of a medium-low speed magnetic levitation bridge and a track in the prior art (when the plane of the bridge is located on a curve and a curve is set to be ultrahigh);
fig. 3 is a cross-sectional view of an integrated medium-low speed magnetic levitation track beam with perforated steel plate shear key type beam rails (when the plane of the bridge is on a straight line) according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of the holed steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam of the embodiment of the present invention when the ceiling of the bridge is inclined to be ultrahigh (when the plane of the bridge is on the curve and the curve is ultrahigh);
fig. 5 is a cross-sectional view of the holed steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam according to the embodiment of the present invention when the track beam is rotated a certain angle to be set to be ultra-high (when the plane of the bridge is located on the curve and the curve is set to be ultra-high);
FIG. 6 is a schematic sectional view taken along line 1-1 in FIG. 2;
FIG. 7 is a top view of FIG. 6 taken along section 2-2;
fig. 8 is a schematic cross-sectional view taken along section 3-3 of fig. 6.
Fig. 9 is a schematic cross-sectional view taken along section 4-4 of fig. 6.
Fig. 10 is a schematic cross-sectional view taken along section 5-5 of fig. 6.
In all the figures, the same reference numerals denote the same features, in particular: the steel beam comprises a concrete beam 1, a rail 2-F, a bolt 3, a first shear pin 4, a heightening base plate 5, an I-shaped short beam bottom plate 6, an I-shaped short beam top plate 7, a second shear pin 8, an I-shaped short beam web plate 9, a bearing table 10 and a steel beam 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
A series of problems to the existence of prior art well low-speed magnetism floats track girder construction, the utility model provides a trompil steel sheet shear force key formula roof beam rail integration well low-speed magnetism floats track girder, its bridge and track structure that is arranged in well low-speed magnetism to float traffic engineering. As shown in fig. 3 to 6, the integrated medium-low speed magnetic levitation track beam comprises a concrete beam 1 and a steel-concrete combined connecting piece symmetrically arranged at the top of the concrete beam 1, wherein the steel-concrete combined connecting piece is integrally cast with the concrete beam 1 in advance to form an integrated structure, and an F rail 2 is connected with the steel-concrete combined connecting piece through a bolt 3, so that the channel beam-rail integrated medium-low speed magnetic levitation track beam is formed. The beam-rail integrated medium-low speed magnetic levitation rail beam cancels the steel beam, the rail panel fastener and the rail bearing platform, has simpler structure and effectively reduces the structure height from the rail surface to the bridge floor; in addition, the construction process is less, the steel bars of the bearing rail platform do not need to be reserved on the top plate of the bridge, the construction process is simpler, and meanwhile, the construction cost is lower.
Specifically, as shown in fig. 6, the steel-concrete composite connecting piece includes an i-shaped short beam bottom plate 6, an i-shaped short beam top plate 7, a second shear pin 8, a first shear pin 4, and an i-shaped short beam web 9. The I-shaped short beam bottom plate 6, the I-shaped short beam top plate 7 and the I-shaped short beam web plate 9 are perpendicular to each other, the top of the I-shaped short beam web plate 9 is fixedly connected with the I-shaped short beam top plate 7 in a welding mode, and the bottom of the I-shaped short beam web plate 9 is fixedly connected with the I-shaped short beam bottom plate 6 in a welding mode to form the I-shaped short beam. The structural shape of the I-shaped short beam web 9 is determined according to the stress condition, the I-shaped short beam web 9 is preferably of an inverted trapezoid structure, the top is wide, the connecting area of the I-shaped short beam top plate 7 and the I-shaped short beam web 9 is increased, the pulling or pressure load bearing capacity of the I-shaped short beam web 9 is improved, the I-shaped short beam bottom plate 6 is relatively narrow, the I-shaped short beam bottom plate is embedded in the concrete beam 1 and integrally cast, the I-shaped short beam web 9 forms pulling force on the I-shaped short beam top plate 7, the F-shaped short beam top plate 7 is supported, and the stress stability of the structure is guaranteed.
Further, as shown in fig. 6, 8 and 10, a second shear pin 8 is provided on the top plate 7 of the i-shaped short beam, and preferably, a plurality of second shear pins 8 are uniformly distributed on the top plate 7 of the i-shaped short beam. The top end of the second shear pin 8 is fixedly connected with the H-shaped short beam top plate 7, and the bottom end of the second shear pin is pre-embedded in the concrete beam 1, so that the connection reliability between the H-shaped short beam top plate 7 and the concrete beam 1 is enhanced, and the running safety and stability of the magnetic levitation railway train are ensured. In addition, be equipped with first shear force nail 4 on the I-shaped short crossbeam bottom plate 6, preferably, this first shear force nail 4 is a plurality of, and the equipartition is on this I-shaped short crossbeam bottom plate 6, and pre-buried in concrete beam 1, and the smoothness of the first step between reinforcing steel and concrete composite connecting piece and the concrete beam 1 fastness of being connected and power transmission.
In addition, be equipped with the circular port on the steel sheet of I-shaped short transverse beam web 9, the longitudinal bridge in the concrete beam 1 passes to the reinforcing bar from the circular port, forms trompil steel sheet shear force key, and the circular port is bigger than reinforcing bar diameter. The utility model discloses a low-speed magnetism floats track roof beam in roof beam-rail integration, steel-concrete built-up connection spare and concrete beam 1 integral casting are in the same place, form steel-concrete integrated configuration, and the bridge links as an organic whole with the track, makes up the atress, and structural stress performance is better. Preferably, the steel-concrete combined connecting pieces are arranged at intervals along the longitudinal direction of the bridge, and the interval is set according to the structural stress and the construction requirement.
As shown in fig. 3, when the perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam is positioned on a straight line, the beam top and the F rail 2 are both horizontally arranged, and the steel-concrete combined connecting piece is arranged in parallel with the beam top; as shown in fig. 4, when the perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation rail beam is located on a curve and needs to be set to be ultrahigh, the beam top and the rail are both transversely arranged in a slope manner, the slope can be arranged towards the left side or the right side, and is specifically arranged according to the requirement of the curve bending direction for balancing the centrifugal force of the bridge balance train; as shown in fig. 5, when the perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation rail beam needs to be ultrahigh on a curve, the ultrahigh can be set by integrally rotating the top plate and the web plate of the concrete beam by an angle. No matter on a straight line or a curved line, the I-shaped short beam bottom plate 7 is always closely attached to the upper surface of the concrete beam 1 and welded with the I-shaped short beam web 9 and the I-shaped short beam bottom plate 6 to form the I-shaped short beam. The thickness and the transverse length of the steel plate of the I-shaped short beam bottom plate 6, the I-shaped short beam top plate 7 and the I-shaped short beam web plate 9 are determined according to the structural stress requirement.
As shown in fig. 6, a height-adjusting base plate 5 is arranged between the F rail 2 and the top plate 7 of the i-shaped short beam, and the height-adjusting base plate 5 is used for adjusting the smoothness of the rail. The height-adjusting base plate 5 can be made into different thicknesses to adapt to the requirement of adjusting the rail surface elevation. In some cases, the height-adjusting shim plate 5 may not be provided.
As shown in fig. 7, the F rail 2 is fixed at the outer end of the rail beam of the i-shaped short beam top plate 7 by bolts 3, and the i-shaped short beam top plate 7 is arranged at a certain distance along the direction of the bridge.
As shown in fig. 8, 9 and 10, the shear nails 8 are welded to the lower edge of the i-shaped short beam top plate 7, the number of the second shear nails 8 and the distance between the second shear nails are set according to the stress requirement and the construction requirement, the bolts 3 are arranged on the i-shaped short beam top plate 7 in a matrix shape and correspond to the bolt holes on the F-shaped rail 2 and the i-shaped short beam top plate 7 one by one, and the number of the bolts 3 is determined according to the stress requirement and the construction requirement.
As shown in fig. 7 and 8, bolt holes are formed in the F rail 2 and the i-shaped short beam top plate 7, and the bolt holes may be circular, long circular, irregular square circular and the like. The hole diameter of the bolt hole is slightly larger than the diameter of the bolt, so that the F-shaped track gauge can be adjusted.
As shown in fig. 10, the top plate 7 of the i-shaped short beam may be formed by closely attaching the lower edge of a steel plate to the top plate of the concrete beam 1, or by aligning the upper edge of a steel plate to the upper edge of the top plate of the concrete beam 1.
The open-pore steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam can be used for conventional simply supported beams, continuous beams, simply supported beams and then continuous beams, and can also be used as a track supporting beam structure to be arranged on bridge decks of various large-size continuous beams, arch bridges, cable-stayed bridges and suspension bridges.
Preferably, when the structural stress is really needed or the structural requirement is needed, the two steel-concrete combined connecting pieces (the i-shaped short beam bottom plate 6, the i-shaped short beam top plate 7, the second shear nails 8, the first shear nails 4 and the i-shaped short beam web 9) which are transversely and symmetrically arranged on the concrete beam 1 can be connected into a whole or only any combination of the i-shaped short beam bottom plate 6, the i-shaped short beam top plate 7 and the i-shaped short beam web 9 is connected into a whole.
Preferably, the cross section of the concrete beam 1 is only one of a plurality of different bridge cross sections, and is not limited to the cross section form in the drawings, and may also be an i-shaped cross section, a T-shaped cross section, a trapezoidal cross section and other cross sections, and may also be a rail bearing beam on the top of a prestressed concrete full-span box beam (beam-on-beam or beam-on-bridge mode), and what is protected in this patent is a structural form of "beam-rail integrated" adopted on the top of a bridge deck.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (10)
1. The utility model provides a trompil steel sheet shear key formula beam rail integration medium low speed magnetic levitation track roof beam, includes concrete beam (1) that sets up along track direction, its characterized in that, this track roof beam still includes:
f rails (2) symmetrically arranged on two sides of the concrete beam (1); and the number of the first and second groups,
the steel-concrete combined connecting piece is arranged between the concrete beam (1) and the F rail (2) and comprises an I-shaped short beam bottom plate (6), an I-shaped short beam top plate (7) and an I-shaped short beam web plate (9), wherein the I-shaped short beam bottom plate (6), the I-shaped short beam top plate (7) and the I-shaped short beam web plate (9) are mutually vertical to form an I-shaped short beam structure;
the steel-concrete combined connecting piece and the concrete beam (1) are poured to form an integral structure, and the F rail (2) and the steel-concrete combined connecting piece are connected through bolts (3) to form the beam-rail integrated medium-low speed magnetic levitation track beam.
2. The open-pore steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in claim 1, wherein a plurality of second shear nails (8) are arranged on the I-shaped short beam top plate (7), the second shear nails (8) are uniformly distributed on the I-shaped short beam top plate (7), the top end of each second shear nail is fixedly connected with the I-shaped short beam top plate (7), and the bottom end of each second shear nail is pre-buried in the concrete beam (1).
3. The open-pore steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in claim 1, wherein a plurality of first shear nails (4) are arranged on the I-shaped short beam bottom plate (6), and the first shear nails (4) are uniformly distributed on the I-shaped short beam bottom plate (6) and are pre-embedded in the concrete beam (1).
4. The open-pore steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam as claimed in claim 1, wherein the structural shape of the I-shaped short beam web (9) is an inverted trapezoidal structure according to the stress condition, the top is wider, and the bottom is narrower, so that the connection area of the I-shaped short beam top plate (7) and the I-shaped short beam web (9) is increased.
5. The perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam as claimed in claim 4, wherein a circular hole is formed in the web (9) of the I-shaped short transverse beam, a longitudinal bridge steel bar in the concrete beam (1) penetrates through the circular hole to form a perforated steel plate shear key, and the diameter of the circular hole is larger than that of the steel bar.
6. The open-hole steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in any one of claims 1-5, wherein a heightening base plate (5) is arranged between the F rail (2) and the top plate (7) of the I-shaped short cross beam, and the heightening base plate (5) has different thicknesses so as to adjust the elevation of a track surface.
7. The open-hole steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in any one of claims 1 to 5, wherein the steel-concrete combined connecting pieces are arranged in pairs, and a pair is arranged at a certain distance along the direction of a bridge.
8. The open-hole steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam as claimed in any one of claims 1-5, wherein bolt holes are formed in the F rail (2) and the I-shaped short beam top plate (7), the bolt holes are circular and long circular, and the hole diameter of the bolt holes is slightly larger than the diameter of the bolt holes so as to adjust the gauge of the F rail.
9. The open-hole steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in any one of claims 1-5, wherein the lower edge of the I-shaped short beam top plate (7) is closely attached to the top plate of the concrete beam (1), or the upper edge of the I-shaped short beam top plate (7) is aligned with the upper edge of the top plate of the concrete beam (1).
10. The open-hole steel plate shear key type beam-rail integrated medium-low speed magnetic floating track beam as claimed in any one of claims 1 to 5, wherein the cross section of the concrete beam (1) is an I-shaped cross section, a T-shaped cross section or a trapezoidal cross section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920485563.2U CN210561504U (en) | 2019-04-11 | 2019-04-11 | Perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920485563.2U CN210561504U (en) | 2019-04-11 | 2019-04-11 | Perforated steel plate shear key type beam-rail integrated medium-low speed magnetic levitation track beam |
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