CN210439155U - Multi-layer continuous combined overhead beam - Google Patents
Multi-layer continuous combined overhead beam Download PDFInfo
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- CN210439155U CN210439155U CN201921024902.3U CN201921024902U CN210439155U CN 210439155 U CN210439155 U CN 210439155U CN 201921024902 U CN201921024902 U CN 201921024902U CN 210439155 U CN210439155 U CN 210439155U
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Abstract
The utility model relates to a multilayer continuous combination built on stilts roof beam belongs to existing line construction field, multilayer continuous combination built on stilts roof beam, including a plurality of just roof beams with the specification, just roof beam end to end forms the roof beam body, the range upon range of connection of staggering of the multilayer roof beam body forms long-span longeron, when under the condition of uninterrupted driving increase wear formula railway bridge and other facilities, consolidate and protect the driving railway.
Description
Technical Field
The utility model relates to a multilayer continuous combination overhead beam belongs to existing line construction field.
Background
At present, a national railway network is basically formed, the grade of the road network is higher and higher, along with the development of economy, urban roads, highways, shipping traffic and the like are rapidly developed, the construction projects of the highways and riverways for passing through railway are very common, the passing span is larger and larger, railway overpasses are developed into porous large frames from original single-hole small bridges, and the original common method for buckling rails and lifting transverse beams to reinforce the lines cannot meet the requirement of the train at the lowest speed of 45 km/h; the D-shaped construction beam-erecting method cannot meet the requirement of large-scale bridge and culvert penetration due to small overhead span. Under the condition that the current safety situation is very outstanding, a safe, scientific and simple construction temporary beam is urgently needed to fill the gap.
SUMMERY OF THE UTILITY MODEL
According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the multi-layer continuous combined overhead beam is used for reinforcing and protecting the traveling railways when an underpass type railway bridge or other facilities are additionally built under the condition of not interrupting traveling.
Multilayer continuous combination built on stilts roof beam, including a plurality of just roof beams with the specification, just roof beam end to end forms the roof beam body, the range upon range of connection that staggers of multilayer roof beam body forms long-span longeron.
The beam comprises short beams which are arranged at staggered positions of the end parts of two adjacent beam bodies. Because the multilayer beam body is range upon range of to stagger to connect and form long-span longeron, consequently must have the staggered floor at its tip, use the short beam to fill the staggered floor position for longeron both ends terminal surface parallel and level guarantees that longeron bulk strength is unanimous.
The length of the short beam is half of that of the temporary beam, and the joint of the adjacent temporary beams of the beam body is positioned in the middle position of the adjacent beam body corresponding to the temporary beam, so that the short beam and the temporary beam have certain specifications, and the construction and the production are facilitated.
The portable beam comprises two supporting webs with the same specification, the two supporting webs are arranged in parallel, an upper flange plate and a lower flange plate are fixed to the upper sides and the lower sides of the two supporting webs respectively, rib plates are vertically fixed to the outer side faces of the two supporting webs, the cross section of the portable beam is in a hollow I shape, and through holes are formed in the end portions of the two supporting webs, the edges of the upper flange plate and the lower flange plate and the edges of the rib plates. Compared with the traditional beam, the hollow I-shaped structure of the beam is lighter in weight and high in strength.
The rib plates at the corresponding positions on the two supporting webs are in the same plane, a partition plate is arranged between the two supporting webs, the partition plate and the corresponding rib plates are in the same plane, and the partition plate is fixedly connected with the inner walls of the two supporting webs. The partition plates play a role in fixed connection, and the partition plates and the corresponding rib plates are in the same plane, so that when the rib plates are under tension, only the partition plates bear the tension, the support web plates are not under the tension, and the deformation of the support web plates can be effectively avoided; meanwhile, as the supporting web plate is not stressed, the thickness of the web plate can be relatively thin, which is beneficial to reducing the whole weight.
The through holes at the ends of the two supporting webs correspond in position, steel pipes are fixedly connected between the two supporting webs, and the connecting steel pipes are communicated with the corresponding through holes. The two-beam needs to penetrate the through hole and be screwed down with the bolt when being connected end to end, and the connecting steel pipe can avoid pressing and deforming the supporting web plate and avoid influencing the strength of the longitudinal beam.
The splicing plate is provided with a through hole, the position and the size of the through hole are matched with those of through holes at two ends of the supporting web plate, and the height of the splicing plate is not larger than that of the supporting web plate. When the beams are connected end to end, the splicing plates on the two sides of the joint are attached and then screwed down after the bolts sequentially penetrate through the through holes of the splicing plates and the web plate, so that the beams are fixed end to end.
The short beam has the same structure and size as the beam except the length.
When the double-layer beam is assembled: after the line is blocked, penetrating into a sleeper beam, hanging a lower layer of stool beam to be connected with the sleeper beam, and then connecting the stool beam end to end; then, hanging an upper layer temporary beam and a lower layer temporary beam in a stacking manner, then, penetrating bolts through holes of a lower flange plate of the upper layer temporary beam and an upper flange plate of the lower layer temporary beam and screwing the bolts with nuts, fixedly connecting upper and lower layer beam bodies, and arranging the joint of the upper and lower layers in a staggered manner;
when the three-layer beam is assembled: a beam body is additionally arranged on the basis of the double-layer beam, the sleeper beam is arranged on the middle-layer beam, the end part of the sleeper beam is fixedly connected with the side edge of the middle beam body in a side hanging mode, and the stress is uniform. The assembly sequence is: after the line is blocked, the sleeper beam is penetrated, the lower layer beam body is hung into the lower layer beam body, the middle layer beam body is hung into the middle layer beam body, the middle layer beam body is fixedly connected with the sleeper beam, and finally the upper layer beam body is hung into the middle layer beam body for fixation.
Compared with the prior art, the utility model beneficial effect who has is:
the multi-layer continuous combined overhead beam of the utility model,
1. the module is of an assembled structure, can be reasonably arranged according to different engineering characteristics, and is suitable for various lines, frames and geological conditions;
2. when the flange plates are used for connecting the sleeper beams, the distance between the sleeper beams is adjustable, and rib plates at proper positions can be selected for connection as required, so that the deflection of an overhead line to a track bed is small, the geometric dimension of the existing line is not damaged, and the safety performance is good;
3. the structure is simple, the hollow I-shaped structure ensures that the weight is lighter, the erection, the assembly and the construction are convenient, and the assembly and the disassembly are simple and convenient;
4. the beam has small span and is suitable for a large-scale frame bridge to pass through a railway; the beam body is small and light, and large-scale hoisting equipment is not needed when the beam body is erected under the contact net;
5. the automobile and the trailer can be transported, the material preparation is convenient, and the hoisting and transportation cost is low;
6. the railway overhead line is not only suitable for railway overhead of a railway main line and a station line, but also suitable for railway overhead of a throat area branch line.
7. The stress direction of the supporting web plate is coincident with the plane where the supporting web plate is located, and the supporting web plate is stressed longitudinally, so that the supporting web plate can bear larger pressure without being thick, and the whole weight of the longitudinal beam is greatly reduced.
Drawings
FIG. 1 is a schematic structural view of the embodiment of the present invention in a combined state;
FIG. 2 is a schematic structural view of the spar of the embodiment of FIG. 1 (with the upper flange plate separated);
FIG. 3 is a schematic structural view of a connecting pipe of the embodiment shown in FIG. 2;
FIG. 4 is a schematic structural view of the separator of the embodiment shown in FIG. 2;
FIG. 5 is a construction diagram of the embodiment of the present invention for building a railway bridge and culvert by using multi-layer continuous composite overhead beams;
FIG. 6 is a bottom view of the construction drawing of FIG. 5;
FIG. 7 is a schematic structural view of the universal block in the construction drawing of FIG. 5;
fig. 8 is a schematic view of a splice plate according to an embodiment of the present invention.
In the figure: 1. a temporary beam; 2. a short beam; 3. an upper flange plate; 4. a web; 5. a partition plate; 6. a connecting pipe; 7. a rib plate; 8. a through hole; 8-1, a first through hole; 8-2, a second through hole; 8-3, a third through hole; 8-4, a fourth through hole; 9. a lower flange plate; 10. a frame bridge; 11. a universal pulley; 12. a track; 13. a beam set is lifted; 14. a stringer; 15. a fulcrum pile; 16. blocking cap piles; 17. concrete sleepers; 18. a plugging plate; 19. a universal pulley.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings:
as shown in fig. 1-4, 7, 8, the multi-layer continuous composite overhead beam of the present invention comprises a plurality of beams 1 of the same specification, wherein the beams 1 are connected end to form a beam body, and the multi-layer beam bodies are stacked and connected in a staggered manner to form a long-span longitudinal beam.
The beam comprises short beams 2, wherein the short beams 2 are arranged at staggered positions of the end parts of two adjacent beam bodies up and down. Because the multilayer roof beam body stacks up stagger and connects and form long-span longeron, consequently must have the staggered floor at its tip, uses short beam 2 to fill the staggered floor position for longeron both ends terminal surface parallel and level guarantees that longeron bulk strength is unanimous.
The length of the short beam 2 is half of that of the temporary beam 1, and the joint of the adjacent temporary beam 1 of the beam body is positioned in the middle position of the adjacent beam body corresponding to the temporary beam 1, so that the short beam 2 and the temporary beam 1 have certain specifications, and not only is construction convenient, but also is production convenient.
The toilet beam 1 comprises two webs 4 with the same specification, the two webs 4 are arranged in parallel, an upper flange plate 3 and a lower flange plate 9 are respectively fixed on the upper side and the lower side of each web 4, rib plates 7 are vertically fixed on the outer side surfaces of the two webs 4, the cross section of the toilet beam 1 is hollow I-shaped, a first through hole 8-1 is formed in the end portion of each web 4, third through holes 8-3 are formed in the edges of the upper flange plate 3 and the lower flange plate 9, and second through holes 8-2 are formed in the edges of the rib plates 7. Compared with the traditional beam 1, the hollow I-shaped structure of the beam 1 has lighter weight and high strength.
The ribbed slabs 7 at the corresponding positions on the two webs 4 are in the same plane, a partition plate 5 is arranged between the two webs 4, the partition plate 5 and the corresponding ribbed slabs 7 are in the same plane, and the partition plate 5 is fixedly connected with the inner walls of the two webs 4. The partition plates 5 play a role in fixed connection, and the partition plates 5 and the corresponding rib plates 7 are in the same plane, so that when the rib plates 7 are under tension, only the partition plates 5 bear the tension, the web plates 4 are not under the tension, and the deformation of the web plates 4 can be effectively avoided; meanwhile, the web 4 is not stressed, so that the thickness of the web 4 can be relatively thin, and the overall weight is favorably reduced.
The middle of the clapboard 5 is hollow, so that the weight is reduced, and the tension capacity of the clapboard is not influenced.
The first through holes 8-1 at the end parts of the two webs 4 are corresponding in position, the steel pipe 6 is fixedly connected between the two webs 4, and the connecting steel pipe 6 is communicated with the corresponding first through holes 8-1. The bolt is required to pass through the first through hole 8-1 and be screwed up when the portable beam 1 is connected end to end, and the connecting pipe 6 can avoid the web plate 4 from being compressed, so that the strength of the longitudinal beam is prevented from being influenced.
The novel splicing plate comprises a splicing plate, wherein a fourth through hole 8-4 is formed in the splicing plate, the position and the size of the fourth through hole 8-4 are matched with the position and the size of the fourth through hole 8-4 at the two ends of a web 4, and the height of the splicing plate is not larger than that of the web 4. When the temporary beam 1 is connected end to end, the splicing plates at the two sides of the joint are attached and then sequentially penetrate through the fourth through holes 8-4 of the splicing plates and the first through hole 8-1 of the web plate 4 by bolts and then are screwed down, so that the temporary beam 1 is fixed end to end. Meanwhile, the joint parts of the flange plates on the upper surface and the lower surface of the longitudinal beam are fixedly connected through the splicing plates so as to ensure the overall strength of the longitudinal beam.
The end parts of the webs 4 are plugged 18 through plugging plates, so that the inner part of the stool beam 1 can be shielded, and the effect of supporting the two webs 4 can be achieved.
The short beam 2 has the same structure and dimensions as the beam 1 except for the length.
The universal pulley 19 comprises a base, wherein a plurality of ball grooves are formed in the lower bottom surface of the base, and rolling balls are matched in the ball grooves. When the frame bridge is jacked in, the universal pulley is arranged between the transverse lifting beam group and the frame bridge, and direct friction between the transverse lifting beam group and the frame bridge is avoided.
When the double-layer beam is assembled: after the line is blocked, the line penetrates into a sleeper beam, a lower layer of the stool beam 1 is hung into the line and connected with the sleeper beam, and then the stool beam 1 is connected end to end; then, hanging the upper layer temporary beam 1 and the lower layer temporary beam 1 for lamination, then, passing a bolt through a lower flange plate 9 of the upper layer temporary beam 1 and a through hole 8 of an upper flange plate 3 of the lower layer temporary beam 1 and screwing the bolts with a nut, fixedly connecting the upper layer beam body and the lower layer beam body, and arranging the seam of the upper layer and the lower layer in a staggered manner;
when the three-layer beam is assembled: a beam body is additionally arranged on the basis of the double-layer beam, the sleeper beam is arranged on the middle-layer beam, the end part of the sleeper beam is fixedly connected with the rib plate of the middle beam body in a side hanging mode, and the stress is uniform. The assembly sequence is: after the line is blocked, the sleeper beam is penetrated, the lower layer beam body is hung into the lower layer beam body, the middle layer beam body is hung into the middle layer beam body, the middle layer beam body is fixedly connected with the sleeper beam, and finally the upper layer beam body is hung into the middle layer beam body for fixation.
The sleeper beam and the longitudinal beam have two connection modes, one is that two ends of the sleeper beam are respectively connected with a lower flange plate 9 of the longitudinal beam, the distance between the sleeper beams is adjustable (namely the sleeper beam is connected with a corresponding through hole 8 on the lower flange plate 9 as required), and a sleeper beam with the length of 4.94m is adopted; the other type is side hanging type connection, namely the sleeper beam is fixedly connected with the rib plate 7, the height between the beam top and the rail top is reduced, a 3.96m long sleeper beam is adopted, and the two connection modes are based on different line spacing and limit requirements of railways and can meet the requirements of various limits.
As a preferred scheme, the beam 1 is fixed with a module of 12 meters, the short beam 2 is fixed with a module of 6 meters, and the length of the beam body is determined according to construction needs when the combination is carried out, and the modules can be increased progressively by 6 meters; the height is determined according to the required span and building limit, and can be double-layer or three-layer;
the hole digging pile supporting longitudinal beam is arranged below the longitudinal beam, and the number of the supporting points is determined by combining calculation with specific conditions of a line. Adopting finite element MIDAS Civil software to perform unit simulation on the beam, and setting various loads to perform loading calculation; or performing vibration analysis on the vehicle-bridge coupling by adopting bridge structure scientific research analysis software BANSYS so as to determine the positions and the number of the digging piles;
the bolt holes on the lower flange plate 9 are arranged in a modulus of 10cm, and the bolt holes of the sleeper beam perpendicular to the longitudinal beam direction are arranged in a modulus of 8cm, so that the stress span of the sleeper beam is adjustable.
As shown in fig. 5-6, the method for building a railway bridge and culvert by using the multilayer continuous combined overhead beam comprises the following steps:
1) constructing a fulcrum pile and a retaining cap pile; the range of the reinforced line is determined according to the height from the rail bottom to the frame bottom and the gradient of the stable slope. The method comprises the steps of determining the positions of supporting points by calculating the number of the supporting points and combining with specific line conditions under the longitudinal beam to be built and the position of a transverse lifting beam group parallel to one side of the longitudinal beam in the railway overhead fixing device, digging holes and pouring reinforced concrete to form supporting point piles and blocking cap piles. Under the condition that a plurality of track lines are parallel or staggered, the number of the fulcrum piles can be determined according to the distance between the track lines, the longitudinal beam fulcrums adopt the fulcrum piles, the plane arrangement of the fulcrum piles is determined according to the width of the frame bridge and the length of the lines needing to be reinforced, and the span of the longitudinal beam and the stress condition of the transverse lifting beam group are integrated. The diameter and length of the pivot pile are determined according to geological conditions and the height of the frame.
And determining the range of the reinforced line, the width of the frame and the length of the stable slopes on two sides, wherein the length of the stable slopes is the ratio of the height of the frame to the height of the slope. The stable slope is determined according to geological data, when the bearing capacity of the foundation is above 120Kpa, the bearing capacity of the foundation is set according to 1:1, when the bearing capacity of the foundation is below 120Kpa and above 80Kpa, the bearing capacity of the foundation is set according to 1:1.5, and when the bearing capacity of the foundation is below 80Kpa, the bearing capacity of the foundation is set according to 1: 2. The pile pitch is adjusted between 6.5m and 9.5m, and the principle is that the bearing capacity of the cross beam is considered, and economic factors are also considered, so that the safety is ensured. The diameter of the pile is generally not less than 120cm, and when the exposed height of the pile is more than 12m, the pile is determined through calculation. The pile length, generally from the frame bottom to the pile bottom, is not less than 3 m, and is determined by detection and calculation when the bearing capacity of the foundation soil is poor. The pile top is high, the pile top without the cross beam group is 55cm below the rail bottom, and the pile top with the cross beam is 20cm below the cross beam bottom. The pile retaining wall can be a cast-in-place reinforced concrete retaining wall and can also be a reinforced concrete pipe open caisson; the pile body is cast by concrete above C20 level. The method comprises the steps of determining a fulcrum through calculation under a longitudinal beam to be built in a railway overhead fixing device and at a position parallel to one side of the longitudinal beam and used for fixing a transverse lifting beam group, digging a hole and pouring reinforced concrete to form a fulcrum pile and a blocking cap pile.
2) The sleeper beam is penetrated; the standard sleeper beam is adopted to vertically penetrate the track from the space of the concrete sleeper, the line runs at a limited speed, the sleeper beam is penetrated by one tamping by utilizing the running clearance of the train according to the principle of penetrating one sleeper beam at intervals, and when the sleeper beam is penetrated, an insulating rubber pad is needed to be filled under one track, so that the short circuit of a track circuit is prevented, and the signal and the running are prevented from being influenced. The sleeper beam is 4940mm long, each concrete is penetrated through one concrete, a phi 22 high-strength bolt is connected with the longitudinal beam, and in order to prevent the occurrence of track circuit connection accidents, a chloroprene rubber insulating pad with the thickness of 20mm is arranged at the contact position of the sleeper beam and the steel rail.
3) Erecting a longitudinal beam; installing a longitudinal beam, locking a line and cutting off the power of an electrified line; hoisting the longitudinal beams in place, connecting at least two sleeper beams with one longitudinal beam in place, mounting a longitudinal beam partition plate after stabilization, laying an insulating rubber mat on the lower rail, connecting all the sleeper beams, and installing a fastener. And erecting the excrement beam on the tops of two ends of the sleeper beam, and fixedly connecting the excrement beam and the sleeper beam into a longitudinal beam through the partition plates. The I-beam has various specifications and models: the I115 type temporary beams, the I100 type temporary beams, the X38 box beams and the like are selected according to different line conditions and building limit requirements, and when the line spacing is limited, the X38 type box beams can be used; the beams are connected with each other with equal strength. The length of the longitudinal beam is set according to the construction span of the structure and the geological condition of the project on the premise of meeting the stability of the side slope. The length of the I-beam is 8 meters, 12 meters and 16 meters, the I-beam is mainly assembled by 12 meters, and can be 36 meters, 48 meters, 60 meters and the like. The longitudinal beams are made of I115-shaped temporary beams made of Q345B bridge steel. The beam height is 1150mm, the beam width is 380mm, the longitudinal beam is a large-span longitudinal beam formed by connecting small-sized temporary beams with a fixed modulus of 12m by an equal-strength connection method, the splice plates are made of 40B materials, phi 22 high-strength bolts are connected with the longitudinal beam, and bolt holes are phi 24.
4) The longitudinal beam is connected with the sleeper beam; fixedly connecting the sleeper beam and the longitudinal beam by using a high-strength bolt; the system sleeper beam transmits the line load to the longitudinal beams, and two ends of the sleeper beam are respectively connected with lower wing plates of the left longitudinal beam and the right longitudinal beam by high-strength bolts; the connection adopts phi 22 bolts and is made of 40B, and the bolt holes are phi 24.
5) Installing a fastener; the track and the sleeper beam are fixed into a whole through the fasteners, the direction of a line is controlled, and nylon insulation angles are arranged at the contact positions of the fasteners and the steel rails.
6) Penetrating into the transverse lifting beam group; and (3) penetrating a longitudinal beam below the transverse lifting beam group and fixing the longitudinal beam on the tops of the fulcrum piles and the retaining cap piles to finish overhead line fixing, wherein the transverse lifting beam group consists of large I-shaped steel and is arranged on the tops of the fulcrum piles and the top of the frame, and the transverse lifting beam group is fixedly connected with the crown fulcrum piles through pre-buried steel rails. The transverse lifting beam is subjected to mechanical detection and calculation according to the span of the fulcrum and the condition of the line to determine the adoption of section steels of different types, the quantity and the length. When the transverse lifting beam group is installed, after all lines are controlled by the temporary beams, the track bed and the roadbed at the position of the transverse lifting beam group are excavated and communicated by utilizing the interval time of a train, and when the train passes through, a temporary fulcrum is erected by short sleepers in advance to support a track, so that the train can pass through stably; and after the frame bridge is jacked to be close to the end of the transverse lifting beam group, the frame bridge starts to penetrate into the transverse lifting beam group, and a rubber mat which is not less than 20cm is laid on the pile top.
7) And excavating the roadbed, and simultaneously jacking the frame bridge 10.
8) When the front end of the frame bridge reaches the side of the first row of fulcrum piles, the frame bridge bears the load of the transverse lifting beam group, all the transverse lifting beams are built on the frame, a universal pulley or a rolling rod is arranged below the transverse lifting beams, then the upper base plate of the fulcrum piles is removed, the fulcrum piles are unloaded, and the first row of fulcrum piles is removed.
9) And (4) continuing to dig and jack, and repeating the process of the step 8) when the front end of the frame bridge reaches the pile edge of the second row of supporting points until the frame bridge is in place.
Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied utility model's principle, belong to within the protection scope of the utility model.
Claims (6)
1. The utility model provides a continuous combination overhead beam of multilayer which characterized in that: the long-span longitudinal beam comprises a plurality of convenient beams (1) with the same specification, wherein the convenient beams (1) are connected end to form a beam body, and a plurality of layers of beam bodies are stacked, staggered and connected to form a long-span longitudinal beam;
just, roof beam (1) includes two webs (4) with specification, two webs (4) parallel arrangement, both sides are fixed upper limb listrium (3) and lower flange listrium (9) respectively about two webs (4), perpendicular fixed floor (7) on two webs (4) lateral surface, just, the transversal hollow I shape of personally submitting of roof beam (1), two webs (4) tip, the edge of upper limb listrium (3) and lower flange listrium (9), the edge of floor (7) all sets up through-hole (8), through-hole (8) are used for just fixed connection between the roof beam (1).
2. The multi-layer continuous composite overhead beam of claim 1, wherein: the beam comprises short beams (2), wherein the short beams (2) are arranged at staggered positions of the end parts of two adjacent beam bodies up and down.
3. The multi-layer continuous composite overhead beam of claim 2, wherein: the length of the short beam (2) is half of that of the temporary beam (1), and the joint of the adjacent temporary beam (1) of the beam body is positioned in the middle of the corresponding temporary beam (1) of the adjacent beam body.
4. The multi-layer continuous composite overhead beam of claim 1, wherein: ribbed slab (7) of corresponding position on two webs (4) set up baffle (5) between two webs (4) in the coplanar, baffle (5) and corresponding ribbed slab (7) are in the coplanar, baffle (5) and two webs (4) inner wall fixed connection.
5. The multi-layer continuous composite overhead beam of claim 1, wherein: the through holes (8) at the end parts of the two webs (4) are corresponding in position, the steel pipes (6) are fixedly connected between the two webs (4), and the connecting steel pipes (6) are communicated with the corresponding through holes (8).
6. The multi-layer continuous composite overhead beam of claim 1, wherein: including the splice plate, set up through-hole (8) on the splice plate, the position and the size of through-hole (8) and the position and the size cooperation of web (4) both ends through-hole (8), the height that highly is not more than web (4) of splice plate, when just roof beam (1) end to end, use the bolt to pass through the splice plate of seam crossing both sides in proper order behind through-hole (8) of splice plate and web (4) screw up after the splice plate laminating through seam crossing both sides to it is fixed with two just roof beams (1) end to end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921024902.3U CN210439155U (en) | 2019-07-03 | 2019-07-03 | Multi-layer continuous combined overhead beam |
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| CN201921024902.3U CN210439155U (en) | 2019-07-03 | 2019-07-03 | Multi-layer continuous combined overhead beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219250A (en) * | 2019-07-03 | 2019-09-10 | 房明贤 | The continuous combined overhead beam of multilayer |
| CN113356092A (en) * | 2021-07-05 | 2021-09-07 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
-
2019
- 2019-07-03 CN CN201921024902.3U patent/CN210439155U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219250A (en) * | 2019-07-03 | 2019-09-10 | 房明贤 | The continuous combined overhead beam of multilayer |
| CN113356092A (en) * | 2021-07-05 | 2021-09-07 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
| CN113356092B (en) * | 2021-07-05 | 2023-08-15 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
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