CN116084226A - Symmetrical U-shaped road three-dimensional crossing structure - Google Patents
Symmetrical U-shaped road three-dimensional crossing structure Download PDFInfo
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- CN116084226A CN116084226A CN202211711365.6A CN202211711365A CN116084226A CN 116084226 A CN116084226 A CN 116084226A CN 202211711365 A CN202211711365 A CN 202211711365A CN 116084226 A CN116084226 A CN 116084226A
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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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- 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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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Abstract
The invention discloses a symmetrical U-shaped highway three-dimensional intersection structure, which relates to the technical field of highway engineering or road engineering, wherein the structure is positioned at the junction of a main road and a three-way road formed by branches, and comprises a first U-shaped return ramp, a second U-shaped return ramp, a main road, branches, branch shunting ramps and a traffic island, wherein the first U-shaped return ramp and the second U-shaped return ramp are arranged at the junction of the roads, the first U-shaped return ramp and the second U-shaped return ramp are provided with U-shaped structures, openings of the first U-shaped return ramp and the second U-shaped return ramp are oppositely arranged, and the branch shunting ramp is arranged at one side of the main road at the junction of the three-way road structure; the structure has the advantages that the ramp which turns and turns around is arranged in the corresponding area above or below the main road, the area occupied by the curve is saved, the area occupied by the whole three-dimensional intersection structure is effectively reduced, meanwhile, the structure can be suitable for mountain areas of elevations in different terrains, the investment cost and the construction land are reduced, and the application range of the structure is expanded.
Description
Technical Field
The invention relates to the technical field of highway engineering or road engineering, in particular to a symmetrical U-shaped highway three-dimensional intersection structure.
Background
The expressway in the mountain area is generally defined as a bidirectional two-lane highway meeting the requirement of high-speed driving, which is suitable for the traffic volume of the secondary highway and partially or completely controls the access. When the expressway or the primary road is crossed with the other grade roads, horn-shaped intercommunication three-dimensional crossing is generally arranged. The horn-shaped intercommunication type stereo intersection refers to a half-direct connection type and annular three-fork intercommunication type stereo intersection of two left turning ramps, and is generally divided into A type and B type, as shown in figure 1. Type a (left panel) is: the left turn exit ramp is semi-direct connection; type B (right panel) is: the left turn exit ramp is annular.
Because the highway construction in the mountain area of the plateau has the contradiction of high-speed requirement prominence and difficult financing, if horn-shaped intercommunication construction cost is too high according to the conventional method, and the land area is too large, the sustainable development of the mountain area is not facilitated, and the conventional highway three-dimensional structure cannot be adopted in the highway construction in the mountain area of the plateau.
Disclosure of Invention
The invention aims to solve the problem of overlarge land area in the prior art, provides a symmetrical U-shaped road three-dimensional intersection structure, can meet the intercommunication function, reduces construction land and investment cost.
In order to achieve the above object, the present invention provides the following technical solutions:
the symmetrical U-shaped highway three-dimensional intersection structure comprises a first U-shaped return ramp, a second U-shaped return ramp, a main road, a branch road and a branch road diversion ramp, wherein the branch road is connected to the side edge of the main road in the first direction through the branch road diversion ramp, one end of the first U-shaped return ramp and the second U-shaped return ramp are respectively U-shaped, U-shaped openings are opposite, the U-shaped end of the first U-shaped return ramp stretches across the main road, the outlet of the first U-shaped return ramp is connected to the branch road diversion ramp, the inlet of the first U-shaped return ramp is connected to a speed reduction lane section of the main road in the second direction, the inlet of the second U-shaped return ramp is connected to the branch road diversion ramp, the U-shaped end of the second U-shaped return ramp stretches across the main road, the outlet of the second U-shaped return ramp is connected to an acceleration lane section of the main road in the second direction, the first U-shaped return ramp is used for turning around a vehicle on the right side of the main road in the first direction, and the second U-shaped return ramp is used for turning around a vehicle on the right side of the main road in the second direction.
The first U-shaped turn-around ramp and the second U-shaped turn-around ramp are arranged at the junction of the three-way road formed by the main road and the branch road in a U-shaped symmetrical way, the first U-shaped turn-around ramp and the second U-shaped turn-around ramp are arranged in the corresponding areas above or below the main road, the other parts of the first U-shaped turn-around ramp and the second U-shaped turn-around ramp are segmented to the main road, the occupied area of a curve is saved, the occupied width of the main road and the turn-around ramp is reduced, the occupied area of the whole three-dimensional intersection structure is effectively reduced, the requirement of three-dimensional passing vehicles on the main road can be met, the vehicles pass through the first U-shaped turn-around ramp and the second U-shaped turn-around ramp to the opposite direction or are shunted to the branch road under the condition of the two-way passing through the main road, the construction cost of the three-way intersection is reduced as much as possible while the construction cost of the three-way intersection is met, and the construction cost of the three-way intersection is reduced as much as possible.
In a preferred embodiment of the present invention, the first U-shaped turn-around ramp includes a first U-shaped curve segment and a first extension segment, wherein the first U-shaped curve segment is a U-shaped end of the first U-shaped turn-around ramp, the first extension segment is arranged at the outer side of the main road in the second direction, two ends of the first extension segment are respectively connected with a deceleration lane segment in the second direction of the main road and one end of the first U-shaped curve segment, the first U-shaped curve segment spans the main road, and the other end of the first U-shaped curve segment is connected to the branch shunt ramp; the first U-shaped turn ramp is divided into two parts, one part is located in a corresponding area covered by the main road, the other part is located beside the main road, the occupied area of the main road can be fully utilized, the first extension section is close to the main road, the width occupied by the whole ramp and the main road together is reduced, vehicles in the speed reduction lane section in the second direction of the main road are guided to the first U-shaped curve section through the first extension section, and turning around is carried out through the first U-shaped curve section, so that turning around of the vehicles in the first direction of the main road is realized.
In a preferred embodiment of the present invention, the second U-turn ramp includes a second U-turn section and a second extension section, where the second U-turn section is a U-shaped end of the second U-turn ramp, the second U-turn section spans the main road, one end of the second U-turn section is connected to the second extension section and is connected to the acceleration lane section in the second direction of the main road through the second extension section, and the other end of the second U-turn section is connected to the branch shunt ramp; the second U-shaped turn ramp is divided into two parts, one part is located in a corresponding area covered by the main road, the other part is located beside the main road, the occupied area of the main road can be fully utilized, the second extension section is connected beside the main road, the total occupied width of the whole ramp and the main road is reduced, the vehicles of the branch shunting ramp are turned around through the second U-shaped curve section, the vehicles of the second U-shaped curve section are guided to the accelerating lane section in the second direction of the main road through the first extension section, and turning around of the vehicles in the other direction on the main road is realized.
In the preferred embodiment of the invention, two ends of the branch diversion ramp are respectively communicated with a deceleration lane section and an acceleration lane section of the main road, and the middle part of the branch diversion ramp is communicated with the acceleration lane section at the middle part of the main road; through the communication position setting of branch road reposition of redundant personnel ramp and main road, make the vehicle of main road first direction can flow out smoothly, make the vehicle of branch road can get into smoothly, make the vehicle of main road second direction can turn around smoothly, ensure that the vehicle passes through.
In the preferred embodiment of the invention, the turning radius of the first U-shaped curve section and the second U-shaped curve section is more than or equal to 15m; through the setting of curvature, the vehicle of first U type bend section and second U type bend section can provide sufficient turning radius, satisfies the turn requirement of vehicle on the ramp.
In the preferred embodiment of the invention, the main road is an overhead road, the branch road is an overhead road or a slope road, and the branch road diversion ramp is level with, lower than or higher than the main road; through the arrangement of the main road, the branch road and the branch road diversion ramp, different three-branch road combinations can be met, the method is suitable for mountain areas of plateaus with different terrains, the application range of the structure is expanded, and different construction structures can be selected.
In a preferred embodiment of the present invention, the first U-shaped curve section is disposed above or below the main road; through the position setting of first U type bend section, can provide different grade separation structures, can carry out grade separation structure's different designs according to the topography in plateau mountain area.
In a preferred embodiment of the present invention, the second U-bend section is disposed above or below the main road; through the position setting of second U type bend section, can provide different grade separation structures, can carry out grade separation structure's different designs according to the topography in plateau mountain area.
In the preferred embodiment of the invention, the widths of the first U-shaped return ramp and the second U-shaped return ramp are less than or equal to 600cm; the width of the first U-shaped turn-around ramp and the width of the second U-shaped turn-around ramp are arranged, so that the requirements of a mountain area of a plateau can be met, and the occupied area is reduced.
In a preferred embodiment of the present invention, the above-mentioned stereo cross structure further includes a traffic island, where the traffic island is disposed at the junction of the branch and the branch split ramp; through the traffic island, the vehicles flowing out of the branch road, the first U-shaped turn ramp and the main road can be split, the passing path is limited and standardized, and the passing efficiency of the vehicles is improved.
Compared with the prior art, the invention has the beneficial effects that:
the three-dimensional intersection structure is characterized in that the U-shaped symmetrical arrangement of the first U-shaped turn-around ramp and the second U-shaped turn-around ramp is used for arranging the turn-around ramp and the turn-around ramp to the corresponding area above or below the main road, the area occupied by the curve is saved, the partial sections of the first U-shaped turn-around ramp and the second U-shaped turn-around ramp are close to the main road, the first extension section and the second extension section are uniformly distributed on two sides of the main road, the occupied width of the main road and the turn-around ramp is reduced, the occupied area of the whole three-dimensional intersection structure is effectively reduced, the requirement of three-way traffic can be met, the novel three-way three-dimensional intersection is provided, the investment cost and the construction land are reduced as much as possible while the three-way traffic function is met, and the three-way intersection structure is particularly suitable for the expressway in the mountain area with the priority main road.
Drawings
FIG. 1 is a prior art horn-shaped inter-working stereo cross architecture;
FIG. 2 is a top view of a symmetrical U-shaped highway three-dimensional intersection structure according to embodiment 1 of the present invention;
FIG. 3 is a side view of a symmetrical U-shaped highway three-dimensional intersection construction according to embodiment 1 of the present invention;
FIG. 4 is a road map of the left turn of the vehicle in the second direction of the main road in embodiment 1 of the present invention;
FIG. 5 is a diagram of a driving route for a left-hand turn of a by-pass vehicle to a second direction of a main road in embodiment 1 of the present invention;
FIG. 6 is a road map of a right turn of a vehicle in a first direction of a main road in embodiment 1 of the present invention;
fig. 7 is a travel route diagram of the first direction of the main road of the by-pass vehicle in embodiment 1 of the present invention;
FIG. 8 is a diagram of a driving route for turning a vehicle around in a first direction to a second direction in a main road in embodiment 1 of the present invention;
FIG. 9 is a diagram of a driving route of the embodiment 1 of the present invention in which the vehicle turns around in the second direction of the main road to the first direction of the main road;
FIG. 10 is a side view of a symmetrical U-shaped highway three-dimensional intersection construction according to embodiment 2 of the present invention;
fig. 11 is a side view of a symmetrical U-shaped road three-dimensional intersection construction according to embodiment 3 of the present invention.
The marks in the figure: 1-a first U-shaped turn-around ramp; 11-a first U-bend section; 12-a first epitaxial segment; 2-a second U-shaped turn-around ramp; 21-a second U-bend section; 22-a second extension; 3-main way; 31-accelerating lane segment; 32-a speed reduction lane segment; 4-branch; 5-branch shunting ramp; 6-traffic islands.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
Referring to fig. 2, the present embodiment provides a symmetrical U-shaped road three-dimensional intersection structure, which is located at an intersection of a three-way road formed by a main road 3 and a branch road 4, and includes a first U-shaped return ramp 1, a second U-shaped return ramp 2, a main road 3, a branch road 4, a branch road split ramp 5 and a traffic island 6, the main road 3 and the branch road 4 form a three-way road structure, the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are arranged at the intersection of the road, the first U-shaped return ramp 1 and the second U-shaped return ramp 2 have a U-shaped structure, openings of the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are oppositely arranged, the branch split ramp 5 is arranged at one side of the main road 3 at the intersection of the three-way road structure, and the traffic island 6 is arranged at the intersection of the branch road split ramp 5 and the branch road 4; according to the structure, the U-shaped structures of the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are arranged in the corresponding areas of the main road 3, the ramps are arranged in the corresponding areas above or below the main road 3, the area occupied by curves is saved, the ramps of the first U-shaped return ramp 1 lean against the main road 3, the width occupied by the main road 3 and the ramps is reduced, the area occupied by the whole three-dimensional intersection structure is effectively reduced, meanwhile, the structure can provide different three-way road combinations, different construction structures can be selected, the structure is suitable for plateau mountain areas of different terrains, the requirements of three-way road three-way vehicles are met, the investment cost and the construction land are reduced, and the application range of the structure is expanded.
In this embodiment, the shunt ramp is located at the side of the main road 3 at the junction of the three roads, the branch 4 is connected to the side of the main road 3 in the first direction through the branch shunt ramp 5, the traffic island 6 is further arranged at the junction where the branch 4 is connected with the branch shunt ramp 5, and the traffic island 6 can shunt the vehicles flowing out of the branch 4, the first U-shaped turn-around ramp 1 and the main road 3, so that the traffic path is limited and standardized, and the vehicle traffic efficiency is improved; the right direction in the diagram of the main road 3 is a first direction, the left direction in the diagram of the main road 3 is a second direction, the branch road 4 branches to allow the vehicles of the deceleration lane section 32 to flow in the first direction of the main road 3, the vehicles of the first U-shaped turn-around ramp 1 to flow in, the vehicles of the branch road 4 to flow in, and the vehicles to flow out to the second U-shaped turn-around ramp 2 and the acceleration lane section 31 in the first direction of the main road 3; the branch road diversion ramp 5 may adopt a road surface structure with the same height as the main road 3, or a road surface structure higher or lower than the main road 3, in this embodiment, the main road 3 is an overhead road, the branch road diversion ramp 5 adopts an overhead road flush with the main road 3, the branch road 4 connected with the main road 3 is also an overhead road with the same height as the main road 3, and the extension section of the branch road 4 may be an inclined slope road, or an overhead road with the same height as the main road 3. Both ends, the middle part of reposition of redundant personnel ramp all with main road 3 intercommunication, the one end of reposition of redundant personnel ramp is connected and is the speed reduction lane section 32 of main road 3 in the first direction at the corresponding part of main road 3, it is used for the vehicle on the main road 3 to get into the reposition of redundant personnel ramp section and slow down, the other end of reposition of redundant personnel ramp is connected and is the acceleration lane section 31 of main road 3 in the first direction at the corresponding part of main road 3, it is used for the vehicle of reposition of redundant personnel ramp section to get into main road 3 to accelerate, the middle part of reposition of redundant personnel ramp is the acceleration lane section 31 of main road 3 in the middle part of first direction, through the setting of the intercommunication position of branch reposition of redundant personnel ramp 5 and main road 3, make the vehicle of main road 3 first direction can flow out smoothly, make the vehicle of branch road 4 can get into smoothly, make the vehicle of main road 3 second direction can turn around smoothly, ensure that the vehicle passes.
Referring to fig. 3, in the embodiment, the widths of the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are equal to 600cm, or the widths of 580cm, 550cm, 500cm and the like are smaller than 600cm, so that the requirements of a mountain area on a plateau can be met by the arrangement of the widths of the first U-shaped return ramp 1, the occupied area is reduced, the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are both arranged above the horizontal height of the main road 3, namely, the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are higher than the main road 3, and other combination modes can be adopted, wherein the turning radii of the first U-shaped curve section 11 and the second U-shaped curve section 21 are all equal to or larger than 15m, namely, at least 15m; the first U-shaped turn-around ramp 1 comprises a first U-shaped curved path section 11 and a first extension section 12, the first extension section 12 is arranged on the outer side of the main road 3 in the second direction, two ends of the first extension section 12 are respectively connected with a speed reduction lane section 32 in the second direction of the main road 3 and one end of the first U-shaped curved path section 11, one end inlet of the first extension section 12 is used for entering a vehicle in the second direction of the main road 3, the first U-shaped curved path section 11 spans the main road 3 and is positioned above the main road 3, the other end outlet of the first U-shaped curved path section 11 is connected to the branch road diversion ramp 5, the part of the first U-shaped curved path section 11 connected with the branch road diversion ramp 5 is obliquely arranged, and the first U-shaped curved path section 11 is used for entering the branch road diversion ramp 5 from the vehicle in the branch road diversion ramp 3; the second U-shaped turn-around ramp 2 comprises a second U-shaped curve section 21 and a second extension section 22, the second U-shaped curve section 21 spans across the main road 3, one end of the second U-shaped curve section 21 is connected with the second extension section 22 and is connected to an accelerating lane section 31 in the second direction of the main road 3 through the second extension section 22, the part of the second extension section 22 connected with the main road 3 is the exit of the second U-shaped turn-around ramp 2, the entrance of the other end of the second U-shaped curve section 21 is connected to the branch diversion ramp 5, the part of the second U-shaped curve section 21 connected with the branch diversion ramp is in an inclined arrangement, and the part of the second U-shaped curve section is used for entering vehicles on the branch diversion ramp 5. The vehicles on the main road 3 turn around through the first U-shaped turn-around ramp 1 and the second U-shaped turn-around ramp 2, and under the condition that the main road 3 is in bidirectional traffic, the vehicles pass around to the opposite direction or are shunted to the branch road 4.
In this embodiment, a first U-shaped curved channel section 11 at one end of the first U-shaped turn-around ramp 1 and a second U-shaped curved channel section 21 of the second U-shaped turn-around ramp 2 are respectively U-shaped and have opposite U-shaped openings, and on a top view of a symmetrical U-shaped highway three-dimensional intersection structure, the positions of the first U-shaped curved channel section 11 and the second U-shaped curved channel section 21 are symmetrically distributed about the position of the branch 4 corresponding to the center of the main road 3; the first U-shaped turn-around ramp is used for turning around a right vehicle in the first direction of the main road 3, the second U-shaped turn-around ramp is used for turning around a right vehicle in the second direction of the main road 3, the first U-shaped turn-around ramp 1 is divided into two parts, one part is positioned in a corresponding area covered by the main road 3, the other part is positioned beside the main road 3, the occupied area of the main road 3 can be fully utilized, the first extension section 12 is close to the main road 3, the width occupied by the whole ramp and the main road 3 is reduced, the vehicle of the speed reduction lane section 32 in the second direction of the main road 3 is guided to the first U-shaped curve section 11 through the first extension section 12, turning around is carried out through the first U-shaped curve section 11, the turning of the vehicles in the second direction on the main road 3 is realized, the second U-shaped turn-around ramp 2 is divided into two parts, one part is positioned in a corresponding area covered by the main road 3, the other part is positioned beside the main road 3, the occupied area of the main road 3 can be fully utilized, the second extension section 22 is connected beside the main road 3, the common occupied width of the whole ramp and the main road 3 is reduced, the vehicles of the branch-off ramp 5 are turned around through the second U-shaped curve section 21, and the vehicles of the second U-shaped curve section 21 are guided to the accelerating lane section 31 in the second direction of the main road 3 through the first extension section 12, so that the turning of the vehicles in the first direction on the main road 3 is realized.
The specific way of diversion and turning in this embodiment is:
1. when the vehicle in the second direction of the main road 3 makes a left turn, referring to fig. 4, the vehicle running route in the left direction of the main road 3 enters through the first U-shaped turn-around ramp 1 at the deceleration lane section 32, enters the branch shunting ramp 5 after turning around by using the first U-shaped turn-around ramp 1, and then enters the branch 4 after turning right.
2. When the vehicle on the branch 4 makes a left turn, referring to fig. 5, the vehicle on the branch 4 makes a right turn and splits the flow into the branch split ramp 5, and then enters the second U-shaped turn-around ramp 2, and then enters the accelerating lane section 31 of the main road 3 through the outlet of the second U-shaped turn-around ramp 2, so as to complete the left turn.
3. When the vehicle in the first direction of the main road 3 makes a right turn, referring to fig. 6, the vehicle in the main road 3 enters the branch diversion ramp 5 through the deceleration lane segment 32 in the first direction, and then turns right to enter the branch 4, and compared with the conventional diversion ramp design, the deceleration lane segment 32 is longer.
4. When the vehicle on the branch 4 makes a right turn, referring to fig. 7, the vehicle on the branch 4 enters the branch diversion ramp 5 first, and then travels through the acceleration lane segment 31 in the first direction of the main road 3 to enter the main road 3.
5. When the vehicle in the first direction of the main road 3 needs to turn around, referring to fig. 8, the vehicle in the main road 3 enters the branch diversion ramp 5 in the right direction through the speed reduction lane section 32 in the first direction, then intersects with the vehicle turning right at the exit of the first U-shaped turn-around ramp 1 before the traffic island 6 once, enters the second U-shaped turn-around ramp 2, and finally turns around through the speed acceleration lane section 31 in the second direction of the main road 3.
6. When the vehicle in the second direction of the main road 3 needs to turn around, referring to fig. 9, the vehicle running route in the left direction of the main road 3 enters through the first U-shaped turn-around ramp 1 at the deceleration lane section 32, enters the branch road diversion ramp 5 after turning around by using the first U-shaped turn-around ramp 1, and enters into the main road 3 through the acceleration lane section 31 at the corresponding position of the branch road 4 in the first direction of the main road 3 on the branch road diversion ramp 5 to finish turning around.
Example 2
The embodiment provides another symmetrical U-shaped road stereo cross structure, and the stereo cross structure of the embodiment and the embodiment 1 are identical except that the up-down positions of the first U-shaped turn-around ramp 1 and the second U-shaped turn-around ramp 2 relative to the main road 3 are different.
Referring to fig. 10, in the present embodiment, the first U-shaped turn-around ramp 1 and the second U-shaped turn-around ramp 2 are both located below the main road 3, the first outer extending section 12 is an inclined road, when a vehicle in the second direction of the main road 3 enters the first U-shaped turn-around ramp 1 through the deceleration lane section 32, it first descends, the exit section of the first U-shaped curve section 11 of the first U-shaped turn-around ramp 1 is ascending, and the vehicle enters the branch diversion ramp 5 through the exit section of the first U-shaped curve section 11 ascending; the entrance of the second U-shaped turn-around ramp 2 is equal to the branch 4 and the branch diversion ramp 5 in height, the second U-shaped curve section 21 is positioned below the main road 3, the entrance of the second U-shaped curve section 21 is a downhill road, a vehicle enters the second U-shaped turn-around ramp 2 to go downhill and then go uphill, the second extension section 22 is an uphill road, and the vehicle passes through the exit section of the second U-shaped curve section 21 and goes uphill to enter the acceleration lane section 31 of the main road 3 in the second direction; the branch road diversion ramp 5 and the main road 3 are auxiliary roads with the same height, and the branch road diversion ramp 5 and the main road 3 can also be auxiliary roads with the height larger than that of the main road 3, and one section of the branch road 4 connected with the branch road diversion ramp 5 is a road which is level with the main road 3; through the setting of first U type turn-around ramp 1 and second U type turn-around ramp 2 for the upper and lower position of main road 3, can provide different three-dimensional cross structures, can carry out the different designs of three-dimensional cross structures according to the topography in plateau mountain area.
Example 3
The third symmetrical U-shaped road three-dimensional intersection structure is provided in this embodiment, and the three-dimensional intersection structure of this embodiment is the same as that of embodiment 1 and embodiment 2 except that the up-down positions of the first U-shaped turn-around ramp 1 and the second U-shaped turn-around ramp 2 with respect to the main road 3 are different.
Referring to fig. 11, in the embodiment, the first U-shaped return ramp 1 is located below the main road 3, the second U-shaped return ramp 2 is located above the main road 3, that is, the first U-shaped return ramp 1 and the second U-shaped return ramp 2 are in an up-down positional relationship, or a stereo cross structure in which the first U-shaped return ramp 1 is above the main road 3 and the second U-shaped return ramp 2 is below the main road 3 may be adopted, and the two structures of the up-down positional relationship may have smaller occupied area, and since the positions of the first U-shaped return ramp 1 and the second U-shaped return ramp 2 at the first extension section 12 and the second extension section 22 have an up-down relationship, the occupied width of the portion of the second U-shaped return ramp 2 beyond the side edge of the main road 3 may coincide with the occupied width of the portion of the first U-shaped return ramp 1 beyond the side edge of the main road 3 in top view. In the stereo cross structure of the embodiment, the first extension section of the first U-shaped return ramp 1 and the part of the first U-shaped curved ramp section 11, which exceeds the main road 3, on the top view just lean against the side edge of the main road 3, and the first U-shaped return ramp 1 and the second U-shaped return ramp 2 exceed the occupation width of the main road 3, which is just the width of the first U-shaped return ramp 1 or the second U-shaped return ramp 2; the first U-shaped turn-around ramp 1 of this embodiment has the same structure as that of embodiment 2, the second U-shaped turn-around ramp 2 is located above the main road 3, the entrance of the second U-shaped curve section 21 is an uphill road, the second extension section 22 is a downhill road, the vehicle is on the second U-shaped turn-around ramp 2 first uphill and then downhill, and the vehicle travels on the first U-shaped turn-around ramp 1 as in embodiment 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The symmetrical U-shaped highway three-dimensional intersection structure is characterized by comprising a first U-shaped return ramp, a second U-shaped return ramp, a main road, a branch road and a branch road diversion ramp, wherein the branch road is connected to the side edge of the main road in the first direction through the branch road diversion ramp, one end of the first U-shaped return ramp and the second U-shaped return ramp are respectively U-shaped, U-shaped openings are opposite, the U-shaped end of the first U-shaped return ramp stretches across the main road, the outlet of the first U-shaped return ramp is connected to the branch road diversion ramp, the inlet of the first U-shaped return ramp is connected to a speed reduction lane section of the main road in the second direction, the inlet of the second U-shaped return ramp is connected to the branch road diversion ramp, the U-shaped end of the second U-shaped return ramp stretches across the main road, the outlet of the second U-shaped return ramp is connected to the first U-shaped return ramp in the second direction of the main road, and the U-shaped return ramp is used for turning around the first U-shaped return ramp in the right direction of the main road, and the first U-shaped return ramp is used for turning around the first vehicle in the right direction.
2. The symmetrical U-shaped highway three-dimensional intersection structure according to claim 1, wherein the first U-shaped turn-around ramp comprises a first U-shaped curve section and a first extension section, the first extension section is arranged on the outer side of the main road in the second direction, two ends of the first extension section are respectively connected with a speed reduction lane section in the second direction of the main road and one end of the first U-shaped curve section, the first U-shaped curve section spans the main road, and the other end of the first U-shaped curve section is connected to the branch road diversion ramp.
3. The symmetrical U-shaped highway three-dimensional intersection structure of claim 2, wherein the second U-shaped turn-around ramp includes a second U-shaped curve segment and a second extension segment, the second U-shaped curve segment straddling the main road, one end of the second U-shaped curve segment being connected to the second extension segment and through the second extension segment to an acceleration lane segment in a second direction of the main road, the other end of the second U-shaped curve segment being connected to the branch shunt ramp.
4. A symmetrical U-shaped road grade separation structure as claimed in claim 3, wherein the turning radius in both the first U-shaped curve section and the second U-shaped curve section is equal to or greater than 15m.
5. The symmetrical U-shaped highway three-dimensional intersection structure according to claim 1, wherein two ends of the branch road diversion ramp are respectively communicated with a deceleration lane section and an acceleration lane section of the main road, and the middle part of the branch road diversion ramp is communicated with the acceleration lane section at the middle position of the main road.
6. The symmetrical U-shaped highway three-dimensional intersection structure of claim 1, wherein the main road is an overhead road and the branch road is an overhead road or a slope road.
7. The symmetrical U-shaped highway three-dimensional intersection structure of claim 2, wherein the first U-shaped curve section is disposed above or below the main road.
8. A symmetrical U-shaped highway grade crossing structure according to claim 3, wherein said second U-shaped curve section is disposed above or below said main road.
9. The symmetrical U-shaped highway solid crossing structure of claim 1, wherein the widths of the first U-shaped turn-around ramp and the second U-shaped turn-around ramp are less than or equal to 600cm.
10. The symmetrical U-shaped highway three-dimensional intersection structure of any one of claims 1-9, further comprising a traffic island disposed at the intersection of the branch and the branch split ramp.
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