CN103452021A - Universal unblocked small overpass - Google Patents

Universal unblocked small overpass Download PDF

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Publication number
CN103452021A
CN103452021A CN2012101693037A CN201210169303A CN103452021A CN 103452021 A CN103452021 A CN 103452021A CN 2012101693037 A CN2012101693037 A CN 2012101693037A CN 201210169303 A CN201210169303 A CN 201210169303A CN 103452021 A CN103452021 A CN 103452021A
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China
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road
bridge
runway
ground level
craspedodrome
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CN2012101693037A
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Chinese (zh)
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刘峰
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刘峰
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Priority to CN2012101693037A priority Critical patent/CN103452021A/en
Publication of CN103452021A publication Critical patent/CN103452021A/en
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Abstract

The invention relates to a bridge road surface device of a one-layer steel structure universal unblocked small overpass built over an intersection. The device makes use of the vacancy area cross relationship of an air-bridge road surface at a distance of 4.50m from the ground to make air layer bridge road surface carriageways where motor vehicles steer left and transverse straight going bridge road surface carriageways. The ground layer includes motor vehicle right steering and straight going ground roads. The underground layer includes an ''x'' shaped underground passage used for non-motor vehicles and pedestrians. According to the method, the grade crossing passing method of motor vehicles at crossroads is changed into vertical crossing passing, thereby solving the problem of unblocked driving and walking of motor vehicles, non-motor vehicles and pedestrians at the same time in all directions of crossroads.

Description

Universal unimpeded small and exquisite overpass bridge
Technical field
The present invention relates to a kind of universal unimpeded small and exquisite overpass bridge, particularly relate to and a kind ofly handing over and floor space overhead, crossing at existing cross, take to build the method on the steel structure bridge road surface of one deck sunk type steel-structure box beam type, utilize apart from the air-bridge road surface on 4.50 meters high, ground and the vacant lot cross reference of ground level road.Produce that motor vehicles travel that left steering aloft and the bridge pavement runway of laterally keeping straight on and motor-driven vehicle going are turned right on ground and left back turning and the vertical main device of the ground level road of craspedodrome.With the method, by motor vehicles at the parting of the ways the mode of travelling of at grade intersection change the universal unimpeded small and exquisite overpass bridge that the clover leaf mode of travelling is built up steel work into.Thereby solve motor vehicles in the unblocked problem of travelling of intersection while all directions.The mode of in the friendship of steel work, building " x " type underground passage below the freely-moving bridge of crossing again, solve pedestrian and the non power driven vehicle straightway current problem of all directions simultaneously.Perhaps in the outside of universal unimpeded small and exquisite overpass bridge four direction, then, to build the pass by one's way mode of overline bridge of all the people present's steel work, also can solve pedestrian and the non power driven vehicle straightway current problem of all directions simultaneously.
Background technology
Timesharing very fast due to the car quantity growth and the right-angled intersection Red Light, Stop is passed through, cause wait, the traffic jam of motor vehicles, pedestrian and non motorized vehicle day by day serious, brought larger inconvenience to the harmonious development of daily life and society.
Build the overpass bridge of reinforced concrete structure in metropolitan district, need to be taken over the land for use, the extensive work such as moving, and floor space is large, cost of investment is high, should not develop in a large number.If use the universal unimpeded small and exquisite overpass bridge of the present invention, can be in the situation that floor space be smaller, cost of investment is lower, solve motor vehicles, pedestrian and non motorized vehicle in right-angled intersection straightway current problem simultaneously.
As can be seen here, above-mentioned existing overpass bridge, in structure and use, obviously still has inconvenience and defect, and urgently is further improved.Therefore how to found a kind of universal unimpeded small and exquisite overpass bridge of new structure, also becoming the current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, overcome the defect that existing overpass bridge exists, be to make its crossroad at urban highway traffic cancel traffic lights and a kind of universal unimpeded small and exquisite overpass bridge of new structure, technical problem to be solved are provided, make vehicle and pedestrian unblocked.The scheme of technical solution problem is to use the bridge road of sunk type steel-structure box beam type, solves the problem of travelling that motor vehicle turns left and keeps straight on and keep straight on from west to east from east to west.Utilize ground level road to solve the problem of travelling that motor vehicle is turned right left back turning and kept straight on from south to north and kept straight on by north orientation south.Use " x " type underground passage or the overpass passage of going slowly to solve the problem of travelling of pedestrian and non motorized vehicle.
The present invention solves its technical problem, mainly realizes by the following technical solutions: the firstth, and the steel structure bridge road surface of using all the people present's sunk type steel-structure box beam type left steering, solve the motor vehicle problem of travelling of left steering simultaneously; The secondth, the steel structure bridge road surface of using a two way, solve the problem of travelling that motor vehicle is kept straight on simultaneously; The 3rd is to use ground level road, solves the problem that motor vehicle right turn and vertical craspedodrome are travelled simultaneously; The 4th is to use ground level road, solves the left back problem of simultaneously travelling that turns to of motor vehicle; The 5th is to use " x " type underground passage or overpass, the problem of walking when solving bicycle and pedestrian.The use that can combine of universal unimpeded small and exquisite overpass bridge, also can disassemble independent use.
A kind of universal unimpeded small and exquisite overpass bridge proposed according to the present invention, left steering and to keep straight on from east to west and keep straight on from west to east be the vacant lot cross reference of utilizing apart from the Through Steel structural bridge road surface on 4.50 meters high, ground, the bridge pavement runway of producing the motor vehicles left steering and laterally keeping straight on, and be main device by the bridge pavement carriage way of four sunk type steel-structure box beam type left steerings and laterally craspedodrome, the universal unimpeded small and exquisite overpass bridge of composition.Wherein: this universal unimpeded small and exquisite overpass bridge will be comprised of aerial one deck, ground one deck and B1.Aerial one deck bridge pavement is left steering and horizontal bridge pavement runway of keeping straight on; Ground one deck is motor vehicle right turn runway, left backly turns to and vertically keep straight on and nonmotorized vehicle lane, sidewalk; B1 is " X " type underground passage, builds on universal unimpeded small and exquisite overpass bridge ground below, and the right and left of four outlets of underground passage all takes the mode in ramp to interconnect with sidewalk, nonmotorized vehicle lane.
The concrete grammar that the present invention can make motor vehicle, bicycle and pedestrian travel simultaneously is: the first, and the method that motor vehicle travels from four direction simultaneously is:
By north east, turned right: by east (12), keep straight on and turn 90 degrees bend (62) continuation craspedodrome to the right side to north (13);
Keep straight on from east to west: by east (11) keep straight on to up gradient (80) through the craspedodrome road (8 " and gug (82) continue to keep straight on to western (20);
By east orientation south, turned left: enter south (3) by east (10) through craspedodrome road (52) up gradient (53) left steering 45 degree runway (54) craspedodrome road (55) left steering 90 degree runway (56) gug (57) right turn 45 degree craspedodrome roads, runway (58) craspedodrome road (59) (60) and keep straight on;
By the left back turning in east orientation east: by east (11), keep straight on and enter east, craspedodrome road (8) to (66) left back turning 180 degree and continue to keep straight on;
By south east, turned right: after turning 90 degrees bend (61) by south (6) craspedodrome to the right side, continue to keep straight on to east (7);
Keep straight on from south to north: by south (5), keep straight on and continue to keep straight on to north (14);
By south orientation west, turned left: by south (4) through craspedodrome road (25) up gradient (26) left steering 45 degree runway (27) craspedodrome road (28) left steerings 90 right turns 45 degree runway (31) gug (32) craspedodrome roads (33), degree runway (29) craspedodrome road (30) westwards (21) keep straight on;
By the left back turning in south orientation south: by south (5), keep straight on and enter south, craspedodrome road (2) to (65) left back turning 180 degree and continue to keep straight on;
By west south, turned right: after turning 90 degrees bend (65) by west (24) craspedodrome to the right side, continue to keep straight on to south (1);
Keep straight on from west to east: by west (23), keep straight on and continue to keep straight on through up gradient (79) craspedodrome road (78) gug (77) to east (8);
By west, northwards turned left: by west (22), through craspedodrome road (34) to up gradient (35) left steering 45 degree runway (36) craspedodrome road (37) left steering 90 degree runway (38) gug (39) right turns 45, spend craspedodrome roads, runway (40) craspedodrome road (41) (42) to north 15;
By west left back turning westwards: by west (23), keep straight on and enter west, craspedodrome road (20) to (68) left back turning 180 degree and continue to keep straight on;
By north west, turned right: after turning 90 degrees bend (63) by north (18) craspedodrome to the right side, continue to keep straight on to west (19);
By north orientation south, kept straight on: by north (17), keep straight on and continue to keep straight on to south (2);
By north orientation east, turned left: by north (16), through craspedodrome road (43) up gradient (44) left steering 45 degree runway (45) craspedodrome road (46) left steerings 90, spend runway (47) craspedodrome road (48) right turn 45 degree runway (49) gug (50) craspedodrome roads (51) to east (9);
By the left back turning in north orientation north: by north (17), keep straight on and enter north, craspedodrome road (14) to (67) left back turning 180 degree and continue to keep straight on;
Keep straight on from east to west: up gradient (80) craspedodrome road (81) gug (82);
Keep straight on from west to east: up gradient (79) craspedodrome road (78) gug (77);
The secondth, bicycle and pedestrian run to " x " type underground passage from four direction simultaneously, and concrete grammar is: from underground passage southeast entrance (70), enter, and can be from outlet (71), (72), (69) out; From underground passage northeast entrance (71), enter, can be from outlet (72), (69), (70) out; From underground passage southwest entrance (72), enter, can be from outlet (69), (70), (71) out; From underground passage northwest (69), enter, can be from outlet (70), (71), (72) out.
The vacant lot intersection of four sunk type steel-structure box girder left steering bridge pavements of the universal unimpeded small and exquisite overpass bridge of the present invention refers to: first group (27) intersect with the vacant lot of (58), (27) on skyborne bridge pavement, cross over ground level road (58) by a runway from right to left, (58) lean on from right to left a runway on ground level road, pass below (27), enter (59) craspedodrome road.Second group (36) intersect with the vacant lot of (33), (36) cross over ground level road (33) by two runways from right to left on bridge pavement aloft, (33) keep straight on ground level road, pass below (36), enter (21) craspedodrome road.The 3rd group (45) intersect with the vacant lot of (40), (45) cross over ground level road (40) by a runway from right to left on skyborne bridge pavement, (40) lean on from left to right a runway on ground level road, pass below (45), enter (41) craspedodrome road.The 4th group (49) intersect with the vacant lot of (52), (49) cross over ground level road (52) by two runways from right to left on the bridge road aloft, (52) keep straight on ground level road, pass below (49), enter up gradient (53).
The concrete structure of the bridge pavement that all the people present's left steering of the present invention travels is: the first, and up gradient and gug are that concrete for making forms, up gradient and bridge pier and gug and bridge pier are integrated ramp.The second, the bridge pavement runway of left steering 90 degree and the bridge pavement runway of laterally keeping straight on are made by the sunk type steel-structure box girder.
By technique scheme, the universal unimpeded small and exquisite overpass bridge of the present invention at least has following advantages and beneficial effect: universal unimpeded small and exquisite overpass bridge floor space is little, only utilizes existing road right-angled intersection overhead to install and use.Universal unimpeded small and exquisite overpass bridge is used the structure steel fabrication small investment, saves again in the situation of soil, manpower and saving electric power resource, and the bridge road that the bridge road that motor vehicle turns left and motor vehicle are kept straight on can be used separately, use also can combine." x " type underground passage and overpass can be used simultaneously, also can separately use.Universal unimpeded small and exquisite overpass bridge has solved under any circumstance motor vehicles, pedestrian and non motorized vehicle, simultaneously the straightway current problem of all directions.Can cancel the traffic lights of crossroad, reduce traffic-police's workload.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of manual, and for above and other purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
The accompanying drawing explanation
Fig. 1 is stereoeffect schematic diagram of the present invention.
Fig. 2 is air-bridge road surface running vehicle of the present invention road schematic diagram.
Fig. 3 is ground level road schematic diagram of the present invention.
The specific embodiment
Reach for further setting forth the present invention technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, universal unimpeded its specific embodiment of small and exquisite overpass bridge, structure, feature and effect thereof that foundation the present invention is proposed, be described in detail as follows.
Example 1. Fig. 1 are the vacant lot cross reference of utilization of the present invention apart from the sunk type steel-structure box girder road surface on 4.50 meters high, ground, the bridge pavement runway of producing the motor vehicles left steering and laterally keeping straight on, and by four left steerings and the bridge pavement carriage way of laterally keeping straight on and the stereoeffect schematic diagram that is the universal unimpeded small and exquisite overpass bridge that forms of main device by the ground level road runway of four right-hand bends and left back turning.
Example 2. figure bis-are the plan view of air-bridge road of the present invention.The code turned left by the south orientation west in figure is (25) (26) (27) (28) (29) (30) (31) (32) (33).The code northwards turned left by west is (34) (35) (36) (37) (38) (39) (40) (41) (42).The code turned left by north orientation east is (43) (44) (45) (46) (47) (48) (49) (50) (51).The code turned left by east orientation south is (52) (53) (54) (55) (56) (57) (58) (59) (60).The code of keeping straight on from east to west is (80) (81) (82).The code of keeping straight on from west to east is (79) (78) (77).
Example 3. figure tri-are the plan view of ground level road of the present invention.The code of being turned right by south east in figure is (6) (61) (7), the code of being turned right by north east is (12) (62) (13), the code of being turned right by north west is (18) (63) (19), and the code of being turned right by west south is (24) (65) (1).
The vacant lot intersection of four sunk type steel-structure box girder left steering bridge pavements that example 4. Fig. 2 are universal unimpeded small and exquisite overpass bridge refers to: first group (27) intersect with the vacant lot of (58), (27) on skyborne bridge pavement, cross over ground level road (58) by a runway from right to left, (58) lean on from right to left a runway on ground level road, pass below (27), enter (59) craspedodrome road.Second group (36) intersect with the vacant lot of (33), (36) cross over ground level road (33) by two runways from right to left on bridge pavement aloft, (33) keep straight on ground level road, pass below (36), enter (21) craspedodrome road.The 3rd group (45) intersect with the vacant lot of (40), (45) cross over ground level road (40) by a runway from right to left on skyborne bridge pavement, (40) lean on from left to right a runway on ground level road, pass below (45), enter (41) craspedodrome road.The 4th group (49) intersect with the vacant lot of (52), (49) cross over ground level road (52) by two runways from right to left on the bridge road aloft, (52) keep straight on ground level road, pass below (49), enter up gradient (53).
The concrete grammar that example 5. Fig. 2 are the bridge pavement that travels of all the people present's sunk type steel-structure box girder left steering of the present invention is respectively:
The present invention is turned left by east orientation south: started by east (10), enter up gradient (53) along craspedodrome road, craspedodrome road (52) and continue to keep straight on and enter craspedodrome road (56) to left steering 90 degree and enter right turn 45 through gug (57) and spend craspedodrome roads, runway (58) craspedodrome road (59) (60) and enter south (3) craspedodrome along (55) after the runway (54) of left steering 45 degree.
The present invention by the left-hand bend of south orientation west is: by south (4), through craspedodrome road (25) up gradient (26) left steering 45 degree runway (27) craspedodrome road (28) left steerings 90, spend (21) craspedodrome westwards of runway (29) craspedodrome road (30) right turn 45 degree runway (31) gug (32) craspedodrome roads (33).
The present invention is northwards turned left by west: by west (22), through craspedodrome road (34) to up gradient (35) left steering 45 degree runway (36) craspedodrome road (37) left steering 90 degree runway (38) gug (39) right turn 45 degree craspedodrome roads, runway (40) craspedodrome road (41) (42), to north (15), kept straight on.
The present invention is turned left by north orientation east: by north (16), through craspedodrome road (43) up gradient (44) left steering 45 degree runway (45) craspedodrome road (46) left steering 90 right turn 45 degree runway (49) gug (50) craspedodrome roads (51), degree runway (47) craspedodrome road (48), to east (9), kept straight on.
The concrete concrete grammar of the sunk type steel-structure box girder bridge pavement of a thing two way of the present invention is:
Described motor vehicle is kept straight on from east to west: by east (11), kept straight on to up gradient (80) through craspedodrome road (81) and gug (82) continuation craspedodrome extremely western (20).
Described motor vehicle is kept straight on from west to east: by west (23), kept straight on and continued to keep straight on through up gradient (79) craspedodrome road (78) gug (77) to east (8).
The concrete structure of the bridge pavement that example 6. travels for all the people present's left steering of the present invention is: the first, and up gradient and gug are that concrete for making forms, up gradient and bridge pier and gug and bridge pier are integrated ramp.The second, the bridge pavement runway of left steering 90 degree and the bridge pavement runway of laterally keeping straight on are made by the sunk type steel-structure box girder.
Example 7. " x " of the present invention type underground passage is one of road of bicycle and pedestrian's walking, and concrete traveling method is: from underground passage southeast entrance (70), enter, and can be from outlet (71), (72), (69) out; From underground passage northeast entrance (71), enter, can be from outlet (72), (69), (70) out; From underground passage southwest entrance (72), enter, can be from outlet (69), (70), (71) out; From underground passage northwest (69), enter, can be from outlet (70), (71), (72) out.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (6)

1. a universal unimpeded small and exquisite overpass bridge is the top-bottom cross relation of utilizing aerial bridge road and ground level road, produce the motor vehicle left steering of sunk type steel-structure box beam type and the air-bridge road of laterally keeping straight on, and motor vehicle right turn and the left back ground level road turned to; " x " type of utilization underground passage, produce bicycle and pedestrian's walking road; It is characterized in that: this universal unimpeded small and exquisite overpass bridge is comprised of bridge road, ground one deck ground level road and the B1 underground passage of aerial one deck sunk type steel-structure box beam type, and the bridge road of aerial one deck sunk type steel-structure box beam type is motor vehicle left steering and horizontal bridge pavement of keeping straight on; Ground one deck ground level road is motor vehicle right turn and the left back ground level road turned to; The B1 underground passage is the road of bicycle and pedestrian's walking.
2. motor vehicle left steering according to claim 1 and laterally the bridge road of craspedodrome; It is characterized in that: bridge and the steel structure bridge that craspedodrome is provided to motor vehicle of the sunk type steel-structure box beam type that this universal unimpeded small and exquisite overpass bridge provides left steering to travel by all the people present to motor vehicle; The steel structure bridge that this all the people present provides left steering to travel to motor vehicle and a steel structure bridge that the sunk type steel-structure box beam type of craspedodrome is provided to motor vehicle, this all the people present's left steering and a bridge of laterally keeping straight on can be used separately, and use also can combine.
3. motor vehicle right turn according to claim 1 and the left back ground level road turned to; It is characterized in that: this universal unimpeded small and exquisite overpass bridge can make motor vehicle right turn and four left back ground level roads that turn to by four.
4. the road that can make pedestrian's right turn and " x " type walk by underground passage according to claim 1, it is characterized in that: " x " type of this universal unimpeded small and exquisite overpass bridge can provide the transit passage extended in all direction for bicycle and pedestrian by underground passage, and ground level road can provide for bicycle and pedestrian the transit passage of right turn.
5. the top-bottom cross relation of bridge road according to claim 1 and ground level road; It is characterized in that: the vacant lot intersection of four sunk type steel-structure box girder left steering bridge pavements of this universal unimpeded small and exquisite overpass bridge refers to: first group of aerial left right vacant lot of a runway (58) of leaning on of a runway (27) and ground of leaning on intersects, aerial left by the skyborne bridge pavement of a runway (27), cross over ground level road (58) by a runway from right to left, the right runway (58) that leans in ground leans on from right to left a runway on ground level road, pass below (27), enter (59) craspedodrome road.Second group of aerial left two runway (36) that lean on intersects with the vacant lot in craspedodrome road, ground (33), aerial left two runways (36) that lean on are crossed over ground level roads (33) by two runways on bridge pavement aloft from right to left, keep straight in craspedodrome road, ground (33) on ground level road, pass below (36), enter (21) craspedodrome road.The 3rd group of aerial left right vacant lot by a runway (40) of a runway (45) and ground of leaning on intersects, aerial left by the skyborne bridge pavement of a runway (45), crossing over ground level road (40) by a runway from right to left, the right runway (40) that leans on of face leans on from left to right a runway on ground level road, pass below (45), enter (41) craspedodrome road.The 4th group of aerial left two runways (49) that lean on intersect with the vacant lot in craspedodrome road, ground (52), aerial left two runways (49) that lean on are crossed over ground level roads (52) by two runways on the bridge road aloft from right to left, keep straight in craspedodrome road, ground (52) on ground level road, pass below (49), enter up gradient (53).
6. smooth-moving bridge for intersection according to claim 1 is characterized in that: described aerial one deck is provided with the semicircular arc runway of four left steerings of motor vehicles, 90 degree and the runway of laterally keeping straight on; Below the bridge pavement runway in left steering and uphill, downhill track, be the cylindrical reinforced concrete bridge pier, the following and both sides on bridge road surface, craspedodrome road are connected with the upper end of steel strip bridge pier; In the floor space that keep straight in ground and the motor vehicles runway side of left back turning is long narrow, carrying bridge and dynamic load state when above bridge pavement, motor vehicles travel at full capacity under weight.
CN2012101693037A 2012-05-29 2012-05-29 Universal unblocked small overpass Pending CN103452021A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102787540A (en) * 2012-08-02 2012-11-21 洛阳市丰热机械有限公司 Unimpeded overpass
CN107012754A (en) * 2015-05-11 2017-08-04 霍庆富 Crossroad difference bridge construction moves towards method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1123859A (en) * 1995-09-29 1996-06-05 李祥裕 Crossroad bridge
JP2005264581A (en) * 2004-03-19 2005-09-29 Tsukinada Kensetsu Kk Rotary juxtaposed type road grade separated crossing structure
CN201062334Y (en) * 2007-04-05 2008-05-21 林财勇 Cross roads with one deck of rectangular road surface two-end upward convex step passage
CN201095719Y (en) * 2007-07-09 2008-08-06 易晓俊 Lifting fast compact all-function viaduct
CN101654900A (en) * 2008-08-19 2010-02-24 刘峰 Smooth-moving bridge for intersection
KR20120005894A (en) * 2010-07-09 2012-01-17 주식회사동일기술공사 Three dimensional crossroad of double layers underground road
CN202671991U (en) * 2012-05-29 2013-01-16 刘峰 Small universal unblocked overpass

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1123859A (en) * 1995-09-29 1996-06-05 李祥裕 Crossroad bridge
JP2005264581A (en) * 2004-03-19 2005-09-29 Tsukinada Kensetsu Kk Rotary juxtaposed type road grade separated crossing structure
CN201062334Y (en) * 2007-04-05 2008-05-21 林财勇 Cross roads with one deck of rectangular road surface two-end upward convex step passage
CN201095719Y (en) * 2007-07-09 2008-08-06 易晓俊 Lifting fast compact all-function viaduct
CN101654900A (en) * 2008-08-19 2010-02-24 刘峰 Smooth-moving bridge for intersection
KR20120005894A (en) * 2010-07-09 2012-01-17 주식회사동일기술공사 Three dimensional crossroad of double layers underground road
CN202671991U (en) * 2012-05-29 2013-01-16 刘峰 Small universal unblocked overpass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102787540A (en) * 2012-08-02 2012-11-21 洛阳市丰热机械有限公司 Unimpeded overpass
CN107012754A (en) * 2015-05-11 2017-08-04 霍庆富 Crossroad difference bridge construction moves towards method

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