CN108252170B - Level crossing bridge applied to level crossing at road center - Google Patents
Level crossing bridge applied to level crossing at road center Download PDFInfo
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- CN108252170B CN108252170B CN201810249978.XA CN201810249978A CN108252170B CN 108252170 B CN108252170 B CN 108252170B CN 201810249978 A CN201810249978 A CN 201810249978A CN 108252170 B CN108252170 B CN 108252170B
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- 230000007547 defect Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/04—Road crossings on different levels; Interconnections between roads on different levels
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/02—Vertical lift bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses a road junction bridge applied to a road junction at the center of a road, which is arranged at the road junction and comprises a fixed platform (1) positioned above the road; the left end and the right end of the fixed platform (1) are respectively connected with two sets of bridge approach combinations which are transversely distributed; the front end and the rear end of the fixed platform (1) are respectively connected with two sets of bridge approach combinations which are longitudinally distributed; each set of bridge approach combination comprises an upper bridge approach (2) and a lower bridge approach (3), and the inner side end of each upper bridge approach (2) is connected with the fixed platform (1); the outer side end of each upper approach bridge (2) is connected with the inner side end of one lower approach bridge (3), and the outer side end of each lower approach bridge (3) is connected with a horizontal road surface. The invention can effectively relieve the problem of cross conflict of vehicles running in different directions at the level crossing of the city, reduce the traffic pressure of the level crossing and ensure the safety and smoothness of the road.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a level crossing bridge applied to a level crossing at the center of a road.
Background
At present, urban traffic is increasingly congested, wherein for a level crossing (i.e. an intersection where two roads intersect on the same plane, i.e. a road intersection) in an urban area, vehicles traveling at the level crossing in different directions easily form a cross collision problem of vehicle traveling at the level crossing due to vehicle stagnation, traffic accidents and the like, so that traffic congestion at the level crossing seriously affects the safe and smooth traveling of the roads.
In order to alleviate traffic congestion problems at level crossings, the following are generally used: widening the road junction, increasing the number of driving lanes and establishing a large-scale interchange, however, the methods are limited by the reasons that the arrangement of urban roads in China is basically shaped, the road transformation space is limited, the land price is expensive and the like, and cannot be effectively applied and implemented, so that the problem of cross conflict of vehicles running straight in different directions at the urban interchange can not be effectively relieved.
Therefore, there is an urgent need to develop a technology that can effectively alleviate the problem of straight-going cross collision of vehicles that run straight in different directions at the level crossing of a city, reduce the traffic pressure at the level crossing, ensure the safe and smooth running of roads, and facilitate the safe travel of people.
Disclosure of Invention
Therefore, the invention aims to provide a road junction bridge applied to the road center of a road junction, which can effectively relieve the problem of straight crossing conflict of vehicles running straight in different directions at the road junction of a city, reduce the traffic pressure of the road junction, ensure the safe and smooth running of the road, facilitate the safe trip of people, and facilitate the wide popularization and application, and has great production practice significance.
To this end, the invention provides a road junction bridge for a road junction at the center of the road, comprising a fixed platform above the road;
the left end and the right end of the fixed platform are respectively connected with two sets of bridge approach combinations which are transversely distributed;
the front end and the rear end of the fixed platform are respectively connected with two sets of bridge approach combinations which are longitudinally distributed;
each set of bridge approach combination comprises an upper bridge approach and a lower bridge approach, and the inner side end of each upper bridge approach is connected with the fixed platform;
the outer side end of each upper approach bridge is connected with the inner side end of one lower approach bridge, and the outer side end of each lower approach bridge is connected with a horizontal road surface.
In two sets of transversely distributed bridge approach combinations connected with the left end of the fixed platform, the lower bridge approach of the bridge approach combination positioned in front is connected with a straight road junction arranged in the center of a transversely distributed road;
in two sets of transversely distributed bridge approach combinations connected with the right end of the fixed platform, the lower bridge approach of the bridge approach combination positioned at the rear is connected with a straight road junction arranged at the center of a transversely distributed road;
in two sets of longitudinally distributed approach bridge combinations connected with the front end of the fixed platform, the lower approach bridge of the approach bridge combination positioned on the right side is connected with a straight road junction arranged in the center of a longitudinally distributed road;
in the two sets of longitudinally distributed bridge approach combinations connected with the rear end of the fixed platform, the lower bridge approach of the bridge approach combination positioned at the left side is connected with a straight road junction arranged at the center of a longitudinally distributed road.
The fixed platform is a rectangular platform, and four corners of the bottom of the fixed platform are respectively connected with a fixed bridge pier;
the fixed platform comprises a rectangular frame formed by four cross beams which are mutually connected together;
two supporting beams which are transversely distributed are fixedly arranged in the rectangular frame.
The inner side end of each upper approach bridge is hinged with the fixed platform;
the outer side end of each upper approach bridge is hinged with the inner side end of one lower approach bridge.
Wherein, the bottom of the position where the outer side end of each upper approach bridge is connected with the inner side end of one lower approach bridge is provided with two fixed bridge piers at intervals;
a row of railings are respectively arranged at the two side edges of each upper approach bridge and each lower approach bridge;
and a hollow traffic light and height limiting integrated frame is arranged at the inlet below the lower approach bridge connected with the straight road junction.
Wherein, two liftable piers are arranged at the middle position of the bottom surface of each lower approach bridge at intervals, and the bottom surface of each liftable pier is positioned on a road surface;
and a mechanism capable of lifting the lower bridge approach in the vertical direction is arranged in each lifting pier.
The mechanism capable of lifting the lower bridge approach in the vertical direction comprises a traction motor, wherein the traction motor is connected with the lower bridge approach and used for driving the lower bridge approach to lift;
or the mechanism capable of lifting the lower approach bridge in the vertical direction comprises a hydraulic source and a hydraulic actuator, wherein the hydraulic source is used for providing stable pressure for the hydraulic actuator;
and a power output shaft of the hydraulic actuator is connected with the bottom surface of the lower approach bridge in a linkage way.
The device comprises a lower bridge approach device, a bridge approach lifting control unit, a red light signal and a green light signal, wherein the bridge approach lifting control unit is connected with each mechanism capable of lifting the lower bridge approach device in the vertical direction and is used for receiving red light signals and green light signals in the transverse direction and the longitudinal direction sent by traffic light display control equipment installed at a level crossing in real time, when the signals in the transverse direction are red light signals, the mechanism capable of lifting the lower bridge approach device in the vertical direction is controlled to execute descending operation on all the lower bridge approaches which are distributed in the transverse direction, and when the signals in the longitudinal direction are red light signals, the mechanism capable of lifting the lower bridge approach device in the vertical direction is controlled to execute descending operation on all the lower bridge approaches which are distributed in the longitudinal direction.
Each fixed pier comprises a base, and two upright posts are arranged on the base at intervals;
the tops of the two upright posts are fixedly provided with supporting tables;
the upper parts of the two upright posts are fixedly connected through a horizontal stay bar;
the middle parts of the two upright posts are fixedly connected through a node plate;
the lower parts of the two upright posts are fixedly connected through a splice plate.
Wherein, in the gap between the horizontal stay bar and the node plate and the gap between the node plate and the splice plate, two inclined stay bars which are distributed in a crossed way are respectively arranged;
the left end and the right end of each diagonal brace are connected with the two upright posts.
Compared with the prior art, the invention provides a road junction bridge applied to the road center of the road, and the lower approach bridge of the lifting emergency bridge is connected with the road center of the road by constructing the lifting emergency bridge, so that the vehicles running in different directions can quickly pass through the lifting emergency bridge, the passing pressure of the vehicles on the ground is reduced, the problem of the straight crossing conflict of the vehicles running in different directions at the road junction of the city is effectively solved, the traffic pressure of the road junction is reduced, the safe and smooth running of the road is ensured, the safety trip of people is facilitated, and the vehicle safety bridge is favorable for wide popularization and application and has great production and practical significance.
Drawings
Fig. 1 is a schematic perspective view of a bridge of a level crossing applied to the center of a road, and the bridge is arranged at the level crossing of the center of the road, and the barrier at two side edges of the lower approach bridge is not shown;
fig. 2 is a schematic perspective view of a road junction bridge applied to a road junction at the center of a road, wherein the road junction bridge is arranged at the road junction at the center of the road, and part of the lower approach bridge is in a lifted state;
FIG. 3 is a schematic view of a bridge of a level crossing in the center of a road for a level crossing in a vehicle passing in a lateral direction;
FIG. 4 is a schematic view of a bridge of a level crossing in the center of a road for a level crossing in a vehicle passing longitudinally while traveling straight;
fig. 5 is a schematic plan view of a fixed bridge pier applied to any one of bridges of a level crossing at the center of a road, in which the level crossing is provided by the present invention;
in the figure: 1 is a fixed platform, 2 is an upper approach bridge, 3 is a lower approach bridge, 4 is a supporting beam, and 5 is a cross beam;
the bridge comprises a railing 6, a fixed bridge pier 7, an upright post 8, a horizontal brace 9, an inclined brace 10, a node plate 11, a splice plate 12, a traffic light and height limiting integrated frame 13 and a liftable bridge pier 14;
21 is a base, 22 is a support table, 100 is a transverse road center line, and 200 is a longitudinal road center line.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the drawings and embodiments.
Referring to fig. 1 to 5, the present invention provides a road junction bridge applied to a road junction lane at the center of a road, which is particularly applied to a road junction scene of a road junction at the center of a road (i.e., a position next to the center line of the road), and which particularly comprises a fixed platform 1 located above the road;
the left end and the right end of the fixed platform 1 are respectively connected with two sets of bridge approach combinations which are transversely distributed;
the front end and the rear end of the fixed platform 1 are respectively connected with two sets of bridge approach combinations which are longitudinally distributed;
each set of bridge approach combination comprises an upper bridge approach 2 and a lower bridge approach 3, and the inner side end (namely, the end close to the fixed platform 1) of each upper bridge approach 2 is connected with the fixed platform 1;
the outer side end (i.e. the end far away from the fixed platform 1) of each upper approach bridge 2 is connected with the inner side end (i.e. the end close to the fixed platform 1) of one lower approach bridge 3, and the outer side end (i.e. the end far away from the fixed platform 1) of each lower approach bridge 3 is connected with a horizontal road surface.
In the invention, in the two sets of bridge approach combinations which are transversely distributed and are connected with the left end of the fixed platform 1, the lower bridge approach 3 of the bridge approach combination positioned in front is connected with a straight road junction which is arranged in the center of a road which is transversely distributed (namely, the position close to the transverse road center line 100);
in two sets of transversely distributed bridge approach combinations connected with the right end of the fixed platform 1, a lower bridge approach 3 arranged on the bridge approach combination at the rear is connected with a straight road junction arranged at the center of a transversely distributed road;
in the two sets of longitudinally distributed approach bridge combinations connected with the front end of the fixed platform 1, the lower approach bridge 3 of the approach bridge combination positioned on the right side is connected with a straight road junction arranged in the center of a longitudinally distributed road (namely, the position close to the longitudinal road center line 200);
in two sets of longitudinally distributed bridge approach combinations connected with the rear end of the fixed platform 1, a lower bridge approach 3 arranged on the left bridge approach combination is connected with a straight road junction arranged in the center of a longitudinally distributed road.
In the invention, the fixed platform 1 is a rectangular platform, and four corners of the bottom of the fixed platform 1 are respectively connected with a fixed bridge pier 7.
In the invention, the fixed platform 1 comprises a rectangular frame formed by four cross beams 5 which are mutually connected;
two supporting beams 4 which are transversely distributed are fixedly arranged in the rectangular frame, and the supporting beams 4 can be box-shaped supporting beams.
In concrete implementation, four corners of the bottom of the rectangular frame are respectively connected with one fixed pier 7.
In the present invention, in particular implementation, the inner side end of each upper approach bridge 2 is hinged to the fixed platform 1, which may specifically be: the hinge is realized through a bearing fixed on the fixed platform 1 and a hinge shaft penetrating through the bearing, and the hinge shaft is connected with the inner side end of the upper approach bridge 2;
the outer side end of each upper approach bridge 2 is hinged with the inner side end of one lower approach bridge 3.
In the present invention, in a specific implementation, two fixed bridge piers 7 are disposed at intervals at the bottom of the position where the outer side end of each upper bridge approach 2 is connected to the inner side end of one lower bridge approach 3.
In the present invention, in a specific implementation manner, a row of rails 6 are respectively disposed at two side edges of each upper approach bridge 2 and each lower approach bridge 3.
In the present invention, each upper approach bridge 2 and each lower approach bridge 3 may be formed by splicing a plurality of box-shaped support beams 4.
In the present invention, in a specific implementation manner, two liftable piers 14 are disposed at a middle position of a bottom surface of each lower approach bridge 3 at intervals, and the bottom surface of each liftable pier 14 is located on a road surface.
In specific implementation, each lifting bridge pier 14 is internally provided with a mechanism capable of lifting the lower bridge approach 3 in the vertical direction, and the mechanism capable of lifting the lower bridge approach 3 in the vertical direction may include a traction motor, and the traction motor is connected with the lower bridge approach 3 and is used for driving the lower bridge approach 3 to lift.
In addition, the mechanism capable of lifting the lower bridge approach 3 in the vertical direction may further include a hydraulic source and a hydraulic actuator, wherein the hydraulic source is used for providing stable pressure for the hydraulic actuator;
the power output shaft of the hydraulic actuator is connected with (e.g. fixedly connected with) the bottom surface of the lower approach bridge 3.
In the present invention, the lower bridge approach 3 of each set of the bridge approach assemblies distributed in the transverse direction may be lowered by the mechanism capable of lifting the lower bridge approach 3 in the vertical direction and then connected to the straight road junction distributed in the transverse direction, or the lower bridge approach 3 of each set of the bridge approach assemblies distributed in the longitudinal direction may be lowered by the mechanism capable of lifting the lower bridge approach 3 in the vertical direction and then connected to the straight road junction distributed in the longitudinal direction.
It should be noted that, for the mechanism of the invention, the lower approach bridge 3 can be lifted in the vertical direction, the height of lifting to the horizontal position can be 1.75m, the weight of the lower approach bridge is not more than 30 tons, and the mechanism can be provided with a counterweight, so that the load of the traction motor is lightened, the traction motor is lighter, and meanwhile, the mechanism is beneficial to rapid lifting, the efficiency is greatly improved, and the arrangement space is saved. The hydraulic mechanism can be adopted, so that the bridge lifting device is light in weight, easy to arrange, stable and accurate to control, and has the defect of low speed, but can also meet the lifting requirement of the bridge.
In the invention, a hollow traffic light and height limiting integrated frame 13 is arranged at the inlet of the lower approach bridge 3 connected with the straight road junction, and the existing red and green display control equipment is arranged on the hollow traffic light and height limiting integrated frame.
In the present invention, the integrated traffic light and height limiting frame 13 is provided in front of the lower bridge approach 3, so that the integrated traffic light and height limiting frame can be linked with the original traffic light in real time, and the lifting of the lower bridge approach 3 is controlled by controlling the mechanism capable of lifting the lower bridge approach 3 in the vertical direction.
In particular, for the bridge for a level crossing provided by the present invention, it further includes an approach bridge lifting control unit, which is in signal connection with each of the mechanisms capable of lifting the lower approach bridge 3 in the vertical direction, for receiving, in real time, red light signals and green light signals transmitted from traffic light display control devices (existing traffic light display control devices installed at the level crossing) installed at the level crossing in the horizontal and vertical directions, when the signals in the horizontal direction are red light signals, controlling the mechanisms capable of lifting the lower approach bridge 3 in the vertical direction to perform a lowering operation (for example, transmitting a lowering control signal to a traction motor) on all the lower approach bridge 3 distributed in the horizontal direction, and it is required to say that, when the signals in the horizontal direction become green lights, all the lower approach bridge 3 distributed in the horizontal direction are gradually lifted again, and when the signals in the vertical direction are red light signals, controlling the mechanisms capable of lifting the lower approach bridge 3 in the vertical direction to perform a lowering operation (for example, transmitting a lowering control signal to the traction motor) on all the lower approach bridge 3 distributed in the vertical direction, and when the signals distributed in the vertical direction are all the lower approach bridge 3 are gradually lifted.
In the concrete implementation, the bridge approach lifting control unit is a programmable controller PLC, a central processing unit CPU, a digital signal processor DSP or a singlechip MCU.
Referring to fig. 3, for the present invention, when a transverse straight vehicle encounters a red light, the road traffic pressure below the bridge can be effectively reduced by passing through the path indicated by the arrow on the bridge in fig. 3, and at this time, the longitudinally distributed lower approach bridge rises and lifts up, and at the same time, the vehicle can be driven in the other direction (longitudinally) and can normally pass under the bridge, so that the traffic pressure at the road junction is effectively relieved. In fig. 3, 100 is the transverse road centerline (i.e., the separation line in the center of the road).
Meanwhile, referring to fig. 4, for the present invention, when the longitudinal straight vehicles meet the red light, the road surface traffic pressure below the bridge can be effectively reduced by passing through the path indicated by the arrow on the bridge in fig. 4, so that the lower approach bridge distributed transversely is lifted up, and the transverse vehicles can normally pass under the bridge, thereby further effectively reducing the traffic pressure at the level crossing. In fig. 4, 200 is a longitudinal road centerline (i.e., a separation line at the center of the road).
Referring to fig. 5, in the present invention, for each fixed pier 7, it includes a base 21, and two columns 8 are disposed on the base 21 at intervals;
the tops of the two upright posts 8 are fixedly provided with a supporting table 22;
the upper parts of the two upright posts 8 are fixedly connected through a horizontal stay bar 9;
the middle parts of the two upright posts 8 are fixedly connected through a node plate 11;
the lower parts of the two upright posts 8 are fixedly connected through a splice plate 12.
In the concrete implementation, two diagonal braces 10 which are distributed in a crossing way are respectively arranged in the gap between the horizontal brace 9 and the node plate 11 and the gap between the node plate 11 and the splice plate 12, and the left end and the right end of each diagonal brace 10 are connected with the two upright posts 8. Therefore, the firm strength of the fixed bridge pier 7 can be effectively ensured, so that the upright posts 8 in the fixed bridge pier 7 can bear the action of larger bending moment.
In the invention, the bridge pier is assembled by adopting the assembled combined rod pieces, the linear rod pieces are used as basic units to be spliced into a space dry system structure, and then the whole assembly is carried out, so that the requirement of manpower assembly can be met, and the assembly speed can be improved. The basic equipment of the assembled steel bridge pier comprises six members and accessories, wherein two upright posts, two connecting system supporting rods, two node plates and two splice plates are respectively arranged; the upright post adopts an H-shaped section with high bearing capacity and excellent compression resistance and bending resistance, the height is 2m and 3m, the upright post can be lifted at the height of 0.5m through the backing plate, the stay bar is formed by a horizontal stay bar and an inclined stay bar and is used for the connection between the upright posts, and the gusset plate is welded on the upright post to realize the connection between the upright post and the stay bar. When the splicing plate is subjected to a large bending moment at the splicing position of the upright post or the backing plate, the splicing plate is added to increase the strength.
In the present invention, it should be noted that, for the level crossing bridge provided by the present invention, it is an emergency bridge of an overpass, and the fixed platform 1 is a positive bridge portion of the emergency bridge of the overpass, that is, a crossing portion of two different directions on the bridge. The upper bridge approach is used as a fixed platform, and the upper bridge approach can rotate and lift around the bearing on the platform. The height of the fixed platform 1 can be set according to the maximum height of vehicles allowed to pass through the intersection, and can be generally 4.5-5 m, so that the under-bridge passing of large vehicles can be met. In particular, when the fixed platform is designed, as the fixed platform bears the load force with the same effect in two different directions, the design of the cross beam in the fixed platform can adopt a mode of vertical and horizontal stiffening ribs, so that the stress of the cross beam in two directions can meet the load requirement.
In the present invention, in a specific implementation, the fixed length of the lower bridge approach 3 may be preferably 26m, the gradient of the lower bridge approach 3 is preferably 15%, and the lower bridge approach 3 directly contacts the ground, where the total number is eight. Meanwhile, the lower approach bridge 3 is mainly used for conducting normal lifting operation to dredge traffic flow when preventing intersection congestion in peak hours, holidays or emergency states of usual and usual, namely the upper approach bridge is fixed and does not work in daytime, the lower approach bridge independently works to lift and descend, and when the lower approach bridge is lifted to a horizontal position, the clearance under the bridge of the lower approach bridge is 3.5 meters, so that the normal passing of urban buses can be met. The upper approach bridge 2 can be lifted up and down when necessary, the number of the upper approach bridge 2 is eight, the designed length can be determined according to the width of an actual intersection, the lifting height of the upper approach bridge 2 can be determined according to the height of the fixed platform 1, and if vehicles below 4.5m are allowed to pass through the intersection at night, the lower approach bridge and the upper approach bridge are all lifted up at night, the bridge does not work any more, and the normal passing mode under the bridge is restored.
For the invention, the lifting emergency bridge is arranged aiming at the condition that the straight crossing is at the center of a road, and the overall arrangement of the bridge pier is divided into three parts: the four corners of the fixed platform are positioned, and four fixed piers are arranged in total; secondly, the joint of the upper bridge approach and the lower bridge approach is provided with two fixed bridge piers, and sixteen fixed bridge piers are provided; thirdly, the middle position of the lower approach bridge is provided with two lifting piers, sixteen lifting piers are arranged at the middle position of each lower approach bridge, and a lifting mechanism is further arranged at the lifting piers and used for lifting the lower approach bridge.
For the invention, in order to achieve the purposes of rapid assembly and manual operation, the assembly of the bridge pier can comprehensively utilize the advantages of high assembly speed of the space rod piece and the plane rod piece and light weight of the linear rod piece, overcome the defects of high assembly speed of the space rod piece and the plane rod piece and low assembly speed of the linear rod piece, and take the linear rod piece as a basic unit to be spliced into a space trunk structure, and then carry out integral assembly.
In summary, for the invention, in order to realize the cooperation of the vehicle, road and bridge, the intelligent traffic system is integrally combined, and the intelligent traffic system can carry out linkage control with the traffic light at the original intersection at the front Fang Zengshe traffic light facility of the lower approach bridge, and can control the lifting of the lower approach bridge in real time. The traction motor can comprise a series of parts such as a brake, a speed reducer, a coupler and the like, and the speed of the current low-speed traction motor is also between 0.5 and 0.7m/s, so that the requirements of high efficiency and short-time lifting can be completely met.
For the invention, the upper bridge approach, the lower bridge approach and the fixed platform part are all combined with the national road standard of 3.5m, two box girders with the width of 1.75m are spliced together, and the railing can be in a 'rice' -shape and can bear certain bending strength.
It should be noted that, for the present invention, the bridge for level crossing is an intelligent lifting bridge, which is mainly composed of steel materials, including steel columns, steel beams, steel structure foundations, and steel rails, all of which are designed by adopting steel structures, the fixed platform, the upper bridge approach and the lower bridge approach are all assembled by adopting box beams, and the assembled bridge pier is assembled by adopting assembled rod pieces. Because of the increased steel output in China, the construction cost is low, the performance is excellent, and the method is widely applied to the design of emergency bridges. The assembled steel structure temporary bridge constructed by steel is called as an assembled steel bridge, and the steel structure bridge has the characteristics of light weight, high strength, large span, short construction period of the steel structure bridge, correspondingly reduced investment cost, high fire resistance and strong corrosion resistance of the steel structure building, and meanwhile, the assembled steel structure bridge is convenient to move, is free from pollution in recovery and is beneficial to storage. And the application is wide: the steel bridge can be suitable for emergency steel bridges, temporary steel bridges, urban traffic fluffing steel bridges and the like.
For the road junction bridge applied to the road center of the straight road junction, the road junction bridge has the beneficial effects that: the road traffic jam prevention device can prevent traffic jams under the premise of not damaging the whole arrangement of roads and greatly utilizing the space under the bridge, is used in rush hours, holiday rush hours or emergency states, effectively solves the cross conflict of the vehicles at the straight crossing at the plane crossing, and relieves the traffic pressure at the crossing.
The road junction bridge provided by the invention can be further based on deep fusion of big data and multidisciplinary, and can realize intelligent perception of road traffic information and intelligent control of traffic optimization by using advanced scientific technologies such as vehicle-mounted network, sensing detection, information communication, vehicle control and the like, realize information sharing among multiple parties by vehicle-to-vehicle communication, vehicle-to-road and road-to-bridge communication, achieve highly coordinated operation among vehicles, roads and bridges, and finally realize optimal and most efficient traffic resource allocation and release traffic pressure.
In summary, compared with the prior art, the road junction bridge applied to the road junction at the center of the road has the advantages that the lifting emergency bridge is built, so that the lower approach bridge of the lifting emergency bridge is connected with the road junction at the center of the road, vehicles running in different directions can realize straight-line cross running through the lifting emergency bridge, the passing pressure of the vehicles on the ground is reduced, the problem of cross collision of the vehicles running in different directions at the road junction of the city can be effectively solved, the traffic pressure of the road junction is reduced, the safe and smooth running of the road is ensured, the safety trip of people is facilitated, the road junction bridge is beneficial to wide popularization and application, and great production and practice significance is achieved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A road junction bridge for a road junction at the centre of the road, characterized by comprising a fixed platform (1) above the road;
the left end and the right end of the fixed platform (1) are respectively connected with two sets of bridge approach combinations which are transversely distributed;
the front end and the rear end of the fixed platform (1) are respectively connected with two sets of bridge approach combinations which are longitudinally distributed;
each set of bridge approach combination comprises an upper bridge approach (2) and a lower bridge approach (3), and the inner side end of each upper bridge approach (2) is connected with the fixed platform (1);
the outer side end of each upper approach bridge (2) is connected with the inner side end of one lower approach bridge (3), and the outer side end of each lower approach bridge (3) is connected with a horizontal road surface;
in two sets of transversely distributed bridge approach combinations connected with the left end of the fixed platform (1), a lower bridge approach (3) arranged on the bridge approach combination at the front is connected with a straight road junction arranged in the center of a transversely distributed road;
in two sets of transversely distributed bridge approach combinations connected with the right end of the fixed platform (1), a lower bridge approach (3) arranged at the rear bridge approach combination is connected with a straight road junction arranged at the center of a transversely distributed road;
in two sets of longitudinally distributed bridge approach combinations connected with the front end of the fixed platform (1), a lower bridge approach (3) arranged on the right side of the bridge approach combination is connected with a straight road junction arranged in the center of a longitudinally distributed road;
in two sets of longitudinally distributed bridge approach combinations connected with the rear end of the fixed platform (1), a lower bridge approach (3) arranged on the left bridge approach combination is connected with a straight road junction arranged in the center of a longitudinally distributed road; two liftable piers (14) are arranged at the middle position of the bottom surface of each lower approach bridge (3) at intervals, and the bottom surfaces of the liftable piers (14) are positioned on road surfaces;
each lifting pier (14) is internally provided with a mechanism capable of lifting the lower bridge approach (3) in the vertical direction.
2. The bridge of the level crossing according to claim 1, wherein the fixed platform (1) is a rectangular platform, and four corners of the bottom of the fixed platform (1) are respectively connected with a fixed bridge pier (7);
the fixed platform (1) comprises a rectangular frame formed by four cross beams (5) which are mutually connected;
two supporting beams (4) which are transversely distributed are fixedly arranged in the rectangular frame.
3. The level crossing bridge according to claim 1, characterized in that the inner end of each upper bridge approach (2) is mutually hinged with the fixed platform (1);
the outer side end of each upper approach bridge (2) is hinged with the inner side end of one lower approach bridge (3).
4. The bridge of the level crossing as claimed in claim 1, characterized in that two fixed piers (7) are arranged at intervals at the bottom of the position where the outer side end of each upper approach bridge (2) is connected with the inner side end of one lower approach bridge (3);
a row of railings (6) are respectively arranged at the edges of the two sides of each upper approach bridge (2) and each lower approach bridge (3);
a hollow traffic light and height limiting integrated frame (13) is arranged at the inlet below the lower approach bridge (3) connected with the straight road junction.
5. The bridge of the level crossing as claimed in claim 1, characterized in that said means for lifting said lower bridge approach (3) in the vertical direction comprise a traction motor connected to said lower bridge approach (3) for driving the lower bridge approach (3) up and down;
alternatively, the mechanism capable of lifting the lower approach bridge (3) in the vertical direction comprises a hydraulic source and a hydraulic actuator, wherein the hydraulic source is used for providing stable pressure for the hydraulic actuator;
and a power output shaft of the hydraulic actuator is connected with the bottom surface of the lower approach bridge (3) in a linkage way.
6. The bridge of the level crossing as claimed in claim 5, further comprising an approach bridge elevation control unit in signal connection with each of said vertically elevating mechanisms for receiving red and green light signals in the lateral and longitudinal directions from a traffic light display control apparatus installed at the level crossing in real time, and controlling said vertically elevating mechanisms for elevating said lower approach bridge (3) to perform a descent operation on all of said lower approach bridges (3) distributed laterally when the signal in the lateral direction is a red light signal, and controlling said vertically elevating mechanisms for elevating said lower approach bridge (3) to perform a descent operation on all of said lower approach bridges (3) distributed longitudinally when the signal in the longitudinal direction is a red light signal.
7. The level crossing bridge according to any one of claims 2 or 4, characterized in that each of said fixed piers (7) comprises a base (21), on which two uprights (8) are arranged at intervals;
the tops of the two upright posts (8) are fixedly provided with supporting tables (22);
the upper parts of the two upright posts (8) are fixedly connected through a horizontal stay bar (9);
the middle parts of the two upright posts (8) are fixedly connected through a gusset plate (11);
the lower parts of the two upright posts (8) are fixedly connected through a splice plate (12).
8. The bridge of the level crossing as claimed in claim 7, characterized in that two diagonal braces (10) are respectively arranged in the gap between the horizontal brace (9) and the gusset plate (11) and the gap between the gusset plate (11) and the splice plate (12);
the left end and the right end of each diagonal brace (10) are connected with the two upright posts (8).
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| CN201810249978.XA CN108252170B (en) | 2018-03-26 | 2018-03-26 | Level crossing bridge applied to level crossing at road center |
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| CN201810249978.XA CN108252170B (en) | 2018-03-26 | 2018-03-26 | Level crossing bridge applied to level crossing at road center |
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| CN108252170B true CN108252170B (en) | 2024-03-22 |
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| CN110485258B (en) * | 2019-06-25 | 2021-09-07 | 中交第三航务工程勘察设计院有限公司 | Full-assembly type steel structure approach bridge and construction method thereof |
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