CN109242525A - A kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method - Google Patents
A kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method Download PDFInfo
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- CN109242525A CN109242525A CN201810785380.2A CN201810785380A CN109242525A CN 109242525 A CN109242525 A CN 109242525A CN 201810785380 A CN201810785380 A CN 201810785380A CN 109242525 A CN109242525 A CN 109242525A
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- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000013316 zoning Methods 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 1
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Abstract
A kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, comprising: and (1) judge whether to belong to intersection, if being not belonging to, execute step (2), otherwise, jump procedure (5)；(2) collect and handle the traffic information at non-crossing crossing；(3) it calculates vehicle safety when hit probability is less than estimate by design and guarantees speed；(4) according to speed distribution map, the region for guaranteeing speed greater than vehicle safety is selected, step (7) are jumped to；(5) collect and handle the traffic information of intersection；(6) the maximum area ratio of overpass and intersection when hit probability is less than estimate by design；(7) comprehensively consider the factors such as Bridges, environment, determine overpass installation location.Using overline bridge site selecting method of the invention, the casualties that may cause when overpass recurring structure collapses can be reduced to a certain extent, be particularly suitable for that vehicle is more, the city of heavy traffic.
Description
Technical field
The invention belongs to traffic programme technical fields, keep away quiet Selection of Urban Pedestrian Overpass addressing side more particularly, to a kind of preferably move
Method.
Background technique
In recent years, with the development of economic construction, China's urban transportation is increasingly flourishing, for the passage energy for improving city road network
Power ensures pedestrian's street crossing safe ready, and the construction of city pedestrian crossing facilities is increasing, wherein main is exactly overpass
Construction.The construction of Selection of Urban Pedestrian Overpass is mentioned to improving running velocity, realizing human and vehicle shunting, improvement congested traffic condition
High city dweller's walking quality etc. has good traffic and social benefit, becomes essential composition in each Traffic Systems
Part, thus the attention increasingly by urban construction department.
Overpass not only facilitates the daily trip of people, also adds the beautiful landscape of a lot of for city.However
Many overpasses are located at the top of the stop line before signal lamp, due at signal lamp often many vehicles at stop line etc.
Wait pass through or be prepared to stop wait go, average speed is smaller, once structure problem occurs in overpass, the vehicle of lower section has no way of hiding
It keeps away, often will cause more serious accident, there is very big security risk.Not long ago, positioned at FIU people's row day of Midland, MI
Bridge is just collapsed, just as bridge is located at the top of stop line before signal lamp, there are many vehicles to meet just when accident occurs
Red light is waiting passage, causes biggish casualties and economic loss then.
Overpass reasonable plant-site selection is to guarantee its economy, safety, the important measures of stability and durability.But so far
Until, less for the research of overpass addressing both at home and abroad, Selection of Urban Pedestrian Overpass is often used as independent facility.Meanwhile
In design, designing unit or designer generally only focus on a certain problem, and the considerations of lack system, this often makes city
The cost performance of overpass is difficult to achieve the desired results, and influences the performance of overpass.
In order to reduce security risk, need to design a kind of Selection of Urban Pedestrian Overpass site selecting method, to reduce overpass
Recurring structure jeopardizes the probability of passing vehicle under bridge when damaging.
Summary of the invention
The present invention provides a kind of preferably move to keep away quiet Selection of Urban Pedestrian Overpass site selecting method, reduces overpass recurring structure
Jeopardize the probability of passing vehicle under bridge when damage.
A kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, comprising the following steps:
(1) judge whether overpass region yet to be built belongs to intersection, if being not belonging to, execute step (2), if belonging to,
Then go to step (5)；
(2) it collects and handles to road conditions basic information in favored area, the average speed-traffic density for obtaining the section is bent
Line fitted figure and speed distribution map；
(3) it calculates when the damage of overpass recurring structure, the probability of vehicle under bridge is hit, to obtain hit probability
Vehicle safety when less than estimate by design guarantees speed；
(4) the speed distribution map for inquiring the section jumps to step after selecting the region for guaranteeing speed greater than vehicle safety
(7)；
(5) basic information for collecting and handling intersection, the average speed-traffic density for obtaining the intersection are bent
Line fitted figure and speed distribution map；
(6) vehicle under bridge is hit when be calculated in favored area when the damage of overpass recurring structure in intersection
Probability, thus the maximum area ratio of overpass and intersection when obtaining hit probability less than estimate by design；
(7) comprehensively consider Bridges, environmental factor and social factor, it is final to determine overpass in favored area
Installation location.
The present invention solves above the motor vehicle waiting area before overpass in city at this stage is usually located at signal lamp, because
This would generally be parked in wait at motor vehicle waiting area there are many vehicle and pass through, once overpass recurring structure collapses, it will and it is right
It causes directly to damage wait drive a vehicle under bridge, often will cause great casualties, there is the case where very big security risk.
In step (2), the road conditions basic information includes: lane width, Vehicle Speed, vehicle fleet size etc..
The detailed process of step (3) are as follows:
(3-1) sets lane width as C, and overpass width is set as w, according to calculation of sector " average speed-traffic density
Curve matching figure " show that the traffic density of the section is y, and overpass collapses, and to pound the probability of vehicle under bridge be P, then specific public
Formula is as follows:
P=y × C × w < Pd (1)
(3-2) searches the correspondence average speed of density y in calculation of sector " average speed-traffic density curve matching figure "
V, the as section " safety assurance speed ", " dynamic " in " preferably move keep away quiet " is to be greater than that " safety is protected at this point, mention in this method
The average speed of card speed ", similarly, " quiet " is the average speed less than " safety assurance speed ".
In this method, the estimate by design PdIt is true according to road importance degree, economy and applicability index comprehensive
It is fixed, it is proposed that 5% < Pd< 20%
The detailed process of step (6) are as follows:
If lane width is C, L at intersection is takenH×LVSquare area be zoning, overpass width sets
For w, show that the traffic density of the calculation of sector is y, people according to calculation of sector " average speed-traffic density curve matching figure "
Row overline bridge collapses, and to strike the probability of vehicle under bridge be P, and the area ratio of overpass and intersection is ρ, then specific formula is such as
Under:
According to measured data, the average speed v of zoning is obtained, search calculation of sector " average speed-traffic density
The corresponding traffic density y of average speed v in curve matching figure ", (4) formula of substitution obtain w, obtain (5) formula further according to the w acquired.
The maximum area ratio of the region overpass and intersection regionIt is wanted when building overpass
Ensure that the area ratio in overpass and intersection region is less than ρ.
Preferably, for intersection, the Bridges selected are intersection " X " shape in step (7)；For non-crossing
Crossing, the Bridges selected are line-styled.
When final choice installation location, the landing position for comprehensively considering Bridges, overline bridge ladder access is also needed, economic benefit,
And the factors such as difficulty of construction.
The present invention select average speed larger and avoid causing because of factors such as traffic lights the region of vehicle parks as
The selection principle of overpass.For non-crossing crossing, by determining safety assurance speed, subsequent being averaged according to the section
Overpass is arranged in speed distribution map, the region for selecting average speed to be greater than safety assurance speed.For intersection, design is handed over
" X " shape man day row bridge is pitched, by calculating the maximum area ratio of overpass and intersection, to be ensured when building overpass
The area ratio in overpass and intersection region is less than maximum area ratio.Overpass can be reduced to a certain extent to tie
The casualties that may cause when structure collapses.
Detailed description of the invention
Fig. 1, which is that the present invention is a kind of, preferably moves the flow chart for keeping away quiet Selection of Urban Pedestrian Overpass site selecting method；
Fig. 2 is the floor map that the present invention carries out overline bridge addressing on the arterial traffic at non-crossing crossing；
Fig. 3 is the floor map that the present invention carries out overline bridge addressing on the arterial traffic of intersection.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, comprising:
S01, judge whether overpass region yet to be built belongs to intersection, if being not belonging to, execute step S02, if belonging to,
Then go to step S05；
S02, collection simultaneously handle average speed-traffic density song that the section is obtained to road conditions basic information in favored area
Line fitted figure and speed distribution map；
S03, to overpass addressing quantitative analysis: according to the average speed of step S02-traffic density curve matching figure,
Determine that the probability that vehicle under bridge is hit when the damage of overpass recurring structure is less than PdWhen the minimum average speed of section vehicle
Degree, i.e. vehicle safety guarantee speed, specifically include:
(1) lane width is set as C m, and overpass width is set as w m, and according to calculation of sector, " average speed-vehicle is close
Write music line fitted figure " show that the traffic density of the section is y/m2, overpass collapse pound vehicle under bridge probability be P,
Then specific formula is as follows:
P=y × C × w < Pd (1)
(2) the correspondence average speed v of density y in calculation of sector " average speed-traffic density curve matching figure " is searched,
The as section " safety assurance speed ", " dynamic " in " preferably move keep away quiet " is to be greater than " safety assurance at this point, mention in this method
The average speed of speed ", similarly, " quiet " is the average speed less than " safety assurance speed ".
Vehicle is by the estimate by design P hit under bridgedIt is comprehensive according to indexs such as road importance degree, economy and applicabilities
It closes and determines.Estimate by design P in the present embodimentdTake 5%.
S04, the speed distribution map for inquiring the section jump to step after selecting the region for guaranteeing speed greater than vehicle safety
Rapid S07；
S05, collection and the basic information for handling intersection, the average speed-traffic density for obtaining the intersection are bent
Line fitted figure and speed distribution map；
S06, in intersection when be calculated in favored area when the damage of overpass recurring structure, hit vehicle under bridge
Probability, so that the maximum area ratio of overpass and intersection when obtaining hit probability less than estimate by design, specific to wrap
It includes:
(1) lane width is set as C m, takes L at intersectionH m×LVThe square area of m is zoning, people's row day
Bridge width is set as w m, and the vehicle of the calculation of sector is obtained according to calculation of sector " average speed-traffic density curve matching figure "
Density is y/m2, overpass collapses, and to strike the probability of vehicle under bridge be P, and the area ratio of overpass and intersection is
ρ, then specific formula is as follows:
According to measured data, the average speed v of zoning is obtained, search calculation of sector " average speed-traffic density
The corresponding traffic density y of average speed v in curve matching figure ", (4) formula of substitution obtain w, obtain (5) formula further according to the w acquired.
(2) determine the maximum area ratio of overpass area Yu intersection region area: the region overpass with intersect
The maximum area ratio in crossing regionTo ensure the face of overpass Yu intersection region when building overpass
Product is than being less than ρ.
S07, comprehensively consider Bridges, environmental factor and social factor, it is final to determine overpass in favored area
Installation location.
As shown in Fig. 2, for non-crossing crossing, by below overpass yet to be built road actual measurement " speed-vehicle is close
Write music line fitted figure " and " average speed distribution map ", determine when overpass recurring structure destroys, under bridge vehicle by
The probability of shock is less than estimate by design PdWhen the minimum average speed of section vehicle, be denoted as " safety assurance speed ", then according to should
The average speed distribution map in section finds average speed less than safety assurance velocity band 3, and remaining area is that average speed is big
In the region of safety assurance speed, overpass is set.In the present embodiment, main bridge 1 is selected as line-styled, finally comprehensively considers
People's row day is arranged in the region that average speed is greater than safety assurance speed in landing position, environment and the economic factor of fly stair 2
Bridge.
As shown in figure 3, for intersection, using the vehicle at intersection mostly all in the spy of driving status
Point, designing main bridge 4 is the man day row bridge for intersecting " X " shape, is erected at intersection, and day bridge is arranged in four ends of main bridge 4
Ladder 5；According to " speed-traffic density curve matching figure " in intersection region, determine that overpass recurring structure destroys
When, vehicle is less than estimate by design P by the probability hit under bridgedWhen overpass and intersection maximum area ratio.It is building
To ensure that the area ratio in overpass and intersection region is less than maximum area ratio when making overpass.
Claims (6)
1. a kind of preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which comprises the following steps:
(1) judge whether overpass region yet to be built belongs to intersection, if being not belonging to, execute step (2) and jumped if belonging to
Go to step (5)；
(2) it collects and handles to road conditions basic information in favored area, the average speed-traffic density curve for obtaining the section is quasi-
Close figure and speed distribution map；
(3) it calculates when the damage of overpass recurring structure, hits the probability of vehicle under bridge, be less than to obtain hit probability
Vehicle safety when estimate by design guarantees speed；
(4) the speed distribution map for inquiring the section jumps to step (7) after selecting the region for guaranteeing speed greater than vehicle safety；
(5) basic information for collecting and handling intersection, the average speed-traffic density curve for obtaining the intersection are quasi-
Close figure and speed distribution map；
(6) in intersection when be calculated in favored area when the damage of overpass recurring structure, vehicle is general under shock bridge
Rate, to obtain the maximum area ratio of overpass and intersection of the hit probability less than estimate by design when；
(7) comprehensively consider Bridges, environmental factor and social factor, it is final to determine overpass to the construction in favored area
Position.
2. according to claim 1 preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which is characterized in that in step (2),
The road conditions basic information includes: lane width, Vehicle Speed, vehicle fleet size.
3. according to claim 1 preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which is characterized in that in step (3),
The vehicle safety guarantees the calculating process of speed are as follows:
(3-1) calculates the traffic density y under the conditions of estimate by design, formula are as follows:
Wherein, C is lane width, and w is overpass width, PdFor estimate by design；
(3-2) searches traffic density y in calculation of sector average speed-traffic density curve matching figure and corresponds to average speed v, i.e.,
For the safety assurance speed of the section.
4. according to claim 1 preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which is characterized in that in step (6),
The maximum area of overpass and intersection compares calculation formula are as follows:
Wherein, PdFor estimate by design, y is traffic density, LHAnd LVFor the side length of the square region at intersection.
5. according to claim 3 or 4 preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which is characterized in that described
Estimate by design PdIt is determined according to road importance degree, economy and applicability index comprehensive, 5% < Pd< 20%.
6. according to claim 1 preferably move keeps away quiet Selection of Urban Pedestrian Overpass site selecting method, which is characterized in that in step (7),
For intersection, the Bridges selected are intersection " X " shape；For non-crossing crossing, the Bridges selected are " one " word
Type.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785380.2A CN109242525B (en) | 2018-07-17 | 2018-07-17 | Urban pedestrian overpass site selection method suitable for movement and quiet avoidance |
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| CN201810785380.2A CN109242525B (en) | 2018-07-17 | 2018-07-17 | Urban pedestrian overpass site selection method suitable for movement and quiet avoidance |
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| CN109242525A true CN109242525A (en) | 2019-01-18 |
| CN109242525B CN109242525B (en) | 2021-08-24 |
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| CN201810785380.2A Active CN109242525B (en) | 2018-07-17 | 2018-07-17 | Urban pedestrian overpass site selection method suitable for movement and quiet avoidance |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108009677A (en) * | 2017-11-29 | 2018-05-08 | 黑龙江鑫联华信息股份有限公司 | A kind of site selecting method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108009677A (en) * | 2017-11-29 | 2018-05-08 | 黑龙江鑫联华信息股份有限公司 | A kind of site selecting method |
Non-Patent Citations (2)
| Title |
|---|
| 汪晓松: ""山地城市桥址复杂风场特性研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 陈尚和等: ""人行过街天桥( 地道) 选址模型的研究"", 《中国公路学报》 * |
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