CN107918716A - Straight channel rectangular pier anticollision field determines method and anticollision device of pier - Google Patents
Straight channel rectangular pier anticollision field determines method and anticollision device of pier Download PDFInfo
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Abstract
The invention discloses a kind of straight channel rectangular pier anticollision field to determine method, and suitable for rectangular pier, anticollision field is ultimate range of " pier the inhales stream " end point apart from bridge pier surface, and the method for determining is：The computation model initially set up, then carries out numerical simulation, the empirical representation that the change curve of the flow velocity with bridge pier characteristic width and channel axis is finally fitted with required data and is drawn to above-mentioned computation model.A kind of anticollision device of pier includes water flow sensing unit, several pressure sensors, several movement buoy, processor module, Pressure-type Water Spraying Device and buoy fixed disks.The present invention substantial effect be：By establishing model, numerical simulation and regression analysis, draw the empirical representation in rectangular pier anticollision field, and design a kind of active anticollision device of pier, it is provided with the variation by current to adjust the mobile buoy of anticollision field size, and forces ship away from bridge pier by Pressure-type Water Spraying Device.
Description
Technical field
The present invention relates to hydraulic engineering fender field, more particularly to straight channel rectangular pier anticollision field to determine method
And anticollision device of pier.
Background technology
Bridge greatly improves the traffic condition in China, is the important composition part of China's transportation network.Reform and opening-up with
Come, China is over strait and crossing-fiver bridge is more and more.Counted according to related data, three main big inland shipping water systems of China are that is, long
River Drainage, Pearl River system and Jinghang Canal water system, existing nearly more than 300 seat of different types of rridges.Bridge construction can effectively facilitate economy
Development, but bridge construction must take into full account the navigation water environment of bridge zone, the good bridge approach of reasonable Arrangement and buoy, to have
The safety of effect control ship opens the navigation or air flight and avoids hitting the generation of bridge accident, and otherwise bridge can become to restrict and open the navigation or air flight safely " bottleneck ".
Such as the Huangshi Yangtze Bridge, since addressing is busy in water transport and the curved waters in river, undesirable flow condition and buoy are set not
Enough science, plus driving, the person's of inducing one adaptability to changes is poor to cause collision accident to take place frequently.Only on April 16th, 1993 to September 16 days
In 147 days, risen with regard to hitting bridge accident 16, shipwreck 9, the millions of members of direct economic loss.Counted according to the Changjiang river marine board, cut-off
To in August, 2003, bridge accidents more than 120 occur altogether for Changjiang River Trunk Line bridge.On June 15th, 2007, Guangdong Jiujiang Bridge
Hit and collapse by ship, cause serious personal's injures and deaths, direct economic loss is up to hundred million yuan.The Zhoushan bridge spanning the sea that Along Zhejiang Coast attracts worldwide attention,
Bridge accident is hit respectively on March 27th, 2008 and generation ship on November 16th, 2009, causes personnel to be missing, ship sinks to losing
Damaged with bridge pier.The generation of above traffic accident, although largely related with driving the person's of inducing one carelessness, is also floated with bridge zone
Mark arranges that inadequate science has certain degree of association.Pier anticollision field be bridge approach and buoy arrangement important evidence, bridge zone
Buoy and navigation channel should be arranged in outside pier anticollision field.It is therefore desirable to determine the scope in pier anticollision field.
Chinese patent notification number CN 206157666U, authorized announcement date on May 10th, 2017, the utility model belongs to bridge
The anticollision field of engineering technology of beam, proposes a kind of anticollision device, collision-prevention device of bridge pier, and a kind of anticollision device, collision-prevention device of bridge pier of proposition, which has, to be set
Anticollision inner ring in bridge pier periphery；Anticollision inner ring (3) is the ring-type formed by polylith rigid hollow box body combinations；In anticollision inner ring
(3) multiple buffers (2) are filled between bridge pier (1)；Anticollision inner ring is provided with anticollision outer shroud on the outside of (3)；Anticollision outer shroud
(5) the fusiformis structure to be formed by polylith rigid hollow box body combinations；The both ends of anticollision outer shroud (5) fusiformis structure have multiple use
To place the cavity of non-linear steel wire rope buffering energy-absorbing device (6)；Roller seat rings are provided with the outside wall surface of anticollision outer shroud (5)
(8), roller seat rings (8) are at least setting up and down two layers, and are set between neighbouring two layers of roller seat rings (8)
Steel glue composite roller (9).The utility model is to ensureing that ship passes through safety and guarantee bridge operation secure context with important
Meaning.But above-mentioned bridge pier protection guard is equipped with complicated bridge pier peripheral structure, easily increases pier and inhale stream, increase around bridge pier
The complexity of water flow structure, particularly when bridge pier spacing is smaller, can increase the possibility of bridge collision, it is therefore desirable to set on the contrary
Count a kind of safer anticollision device of pier.
The content of the invention
The technical problem to be solved in the present invention is：1st, the scope in pier anticollision field is determined；2nd, design a kind of safer
Anticollision device of pier.
The present invention is that technical solution is used by solving the above problems：A kind of straight channel rectangular pier anticollision field is true
Determine method, suitable for rectangular pier, set D as pier anticollision territory, that is to say " pier inhales stream " end point apart from bridge pier table
The ultimate range in face, the factor for influencing D are the flow velocity U of bridge pier characteristic width B and channel axis, wherein, bridge pier characteristic width is
Bridge pier width is in the maximum width perpendicular to current main flow direction, it is characterised in that the method for determining D is：Initially set up the calculating of D
Model, then carries out numerical simulation to above-mentioned computation model, finally fits D with bridge pier characteristic width B with required data
And the flow velocity U of channel axis change curve and draw the empirical representation of D.
Preferably, the RNGk- ε models that the computation model uses, the governing equation group of the model include：
(1) mass-conservation equation (continuity equation)：I=1,2
(2) momentum conservation equation：I=1,2
(3) k- equations：I=1,2
(4) ε-equation：I=1,2
The implication of relevant parameter is in above equation group：xi(=x, y) represent the coordinate in axially and radially direction；ui(=ux,uy)
Represent the flow rate of water flow in axially and radially direction；ρ represents the density of current；P represents pressure；ν represents the dynamic viscosity of current；νt
Represent vortex viscosity, νt=Cμ(k2/ ε), k represents turbulent fluctuation energy, and ε represents disorderly kinetic energy dissipation rate, Cμ=0.085, the value of other specification
It is as follows：η=Sk/ ε, C1=1.42,ηo=4.377, λ=0.012,C2=1.68, αk=αε=1.39,
Wherein, boundary condition is handled in accordance with the following methods：
(1) boundary condition that becomes a mandarin becomes a mandarin, and mean flow rate, Turbulent Kinetic are distributed, dissipation turbulent kinetic energy is distributed.Their mathematics
Expression formula is respectively：uin=U；K=0.0144U2；ε=k1.5/ (0.25b), wherein：U is channel entrance flow velocity, and b is wide for navigation channel
Degree；
(2) Outlet boundary processing method is as follows：It is assumed that go out stream fully development；
(3) wall boundary processing method is：Used in boundary layer flow without sliding it is assumed that is to say, the speed on wall border and side
Boundary's node speed component is all equal.
Preferably, tried to achieve by the model in claim 2 some groups wide on anticollision territory D and bridge pier feature
The data of relation between B and the flow velocity U of channel axis are spent, the curve of D are fitted by gained point coordinates, so as to obtain straight
The empirical representation of navigation channel rectangular pier anticollision field D.
Preferably, a kind of anticollision device of pier, the straight channel rectangular pier anticollision neck drawn in usage right requirement 3
The empirical representation of domain D, including water flow sensing unit, several pressure sensors, several movement buoy, processor module, pressures
Power formula water injector and buoy fixed disk, the processor module be used for the size by empirical representation calculating anticollision field D,
Handle signal and control pressure formula water injector and buoy fixed disk；The water flow sensing unit is fixed on bridge pier, with processing
Device module connects, and for measuring velocity magnitude and the direction of current, its data is used for the empirical representation of D；The pressure passes
Sensor is fixed on inside mobile buoy, is connected with processor module, for judging whether ship enters straight channel rectangle bridge
The inside of pier anticollision field D；The buoy fixed disk is horizontally fixed on the bottom under bridge pier, including disk body and several slip dresses
Put, the carriage is moved horizontally on disk body and is connected with processor module；The mobile buoy by anchor chain anchorage in
On the carriage of buoy fixed disk, and the distance apart from bridge pier is changed by the slip of carriage；The pressure-type spray
Water installations are fixed on below the water surface of bridge pier, including pressure chamber and water jet, are connected with processor module, and the water jet is to turn
Dynamic formula water jet, water jet can be rotated around bridge pier, and the opening and closing of the pressure chamber and the rotation direction of water jet are by processor mould
Block control, for enter anticollision field D inside ship base injcction water column.
Preferably, the carriage is guide tracked pulley gear, including some be fixed on disk are in bridge
Pier center is the radial guide rail and several sliding motors in the center of circle, and sliding motor moves in guide rail, so as to drive mobile floating
Mark is close and away from bridge pier.
Preferably, the anticollision device of pier carries out anticollision by following steps：
S1：Processor module obtains the size and Orientation of water velocity by water flow sensing unit, so that it is wide to calculate bridge pier feature
Spend the flow velocity U of B and channel axis, and the size of anticollision field D is calculated by the empirical representation of D；
S2：Mobile buoy is moved to the edge of anticollision field D by carriage；
S3：When the pressure sensor of multiple anticollision buoys in succession is sequentially generated pressure signal, it is determined as that ship is led into anticollision
Inside the D of domain and the position for first pressure sensor for producing signal is recorded, processor judges that ship enters anticollision field D；
S4：Water jet, is moved to the direction of first pressure sensor, then by processor module Opening pressure formula water injector
Pressure chamber is opened to the ship base injcction water column entered inside anticollision field D, and then reduces the size that pier inhales stream, forces ship
Away from bridge pier.
The present invention substantial effect be：By establishing model, numerical simulation and regression analysis, rectangular pier is drawn
The empirical representation of anticollision field D, and design a kind of active anticollision device of pier, it be provided with by the variation of current come
The mobile buoy of anticollision field size is adjusted, and ship is forced away from bridge pier by Pressure-type Water Spraying Device.
Brief description of the drawings
Fig. 1 is the graph of relation between the anticollision field D and correlative factor fitted according to numerical computations acquired results.
Fig. 2 is the bridge pier characteristic width schematic diagram under the conditions of oblique flow.
Embodiment
Below by specific embodiment, and with reference to attached drawing, the embodiment of the present invention is further described in detail.
After building bridge in navigable waters, due to the presence of bridge pier, water flow structure can change, and bridge pier nearby exists
" pier inhales stream " and " pier plug-flow "." pier plug-flow " can promote ship away from bridge pier, comparatively safe for ship movement and bridge,
And " pier inhales stream " plays the role of inducing ship to hit bridge, therefore the stream is often that ship hits one of major incentive of bridge.Therefore herein
The ultimate range of " pier inhales stream " apart from bridge pier surface is defined as to the anticollision field of bridge pier.For the safety of ship and bridge, ship
Oceangoing ship should not be swarmed within this territory.While in order to remind ship nearby often also should away from pier anticollision domain area, bridge pier
" bridge floats " for dodging specific light is provided with, to warn ship away from the field.Pertinent literature is it has been shown that influence bridge pier current knot
An important factor for structure is the characteristic width of bridge pier fluoran stream surface and the Froude number of neighbouring current, and influences near bend bridge zone not labor
An important factor for moral number is bend overall flow rate.Therefore, the factor for influencing pier anticollision field is bridge pier characteristic width (bridge pier width
In the maximum width perpendicular to main flow direction) the flow velocity U, i.e. D=f (B, U) of B and channel axis.In above formula：D leads for pier anticollision
Domain scope, that is to say ultimate range of " pier the inhales stream " end point apart from bridge pier surface.B be bridge pier characteristic width, U channel axis
Flow velocity.
A kind of straight channel rectangular pier anticollision field determines method, suitable for rectangular pier, sets D and is led as pier anticollision
Domain scope, that is to say that " pier inhales stream " for end point apart from the ultimate range on bridge pier surface, the factor for influencing D is bridge pier characteristic width B
And the flow velocity U of channel axis, wherein, bridge pier characteristic width is bridge pier width in the maximum width perpendicular to current main flow direction, really
The method for determining D is：The computation model of D is initially set up, numerical simulation then is carried out to above-mentioned computation model, finally with required number
According to fitting D with the change curve of bridge pier characteristic width B and the flow velocity U of channel axis and draw the empirical representation of D.
The RNGk- ε models that computation model uses, the governing equation group of the model include：
(1) mass-conservation equation (continuity equation)：I=1,2
(2) momentum conservation equation：I=1,2
(3) k- equations：I=1,2
(4) ε-equation：I=1,2
The implication of relevant parameter is in above equation group：xi(=x, y) represent the coordinate in axially and radially direction；ui(=ux,uy)
Represent the flow rate of water flow in axially and radially direction；ρ represents the density of current；P represents pressure；ν represents the dynamic viscosity of current；νt
Represent vortex viscosity, νt=Cμ(k2/ ε), k represents turbulent fluctuation energy, and ε represents disorderly kinetic energy dissipation rate, Cμ=0.085, the value of other specification
It is as follows：η=Sk/ ε, C1=1.42,ηo=4.377, λ=0.012,C2=1.68, αk=αε=1.39,
Wherein, boundary condition is handled in accordance with the following methods：
(1) boundary condition that becomes a mandarin becomes a mandarin, and mean flow rate, Turbulent Kinetic are distributed, dissipation turbulent kinetic energy is distributed.Their mathematics
Expression formula is respectively：uin=U；K=0.0144U2；ε=k1.5/ (0.25b), wherein：U is channel entrance flow velocity, and b is wide for navigation channel
Degree；
(2) Outlet boundary processing method is as follows：It is assumed that go out stream fully development；
(3) wall boundary processing method is：Used in boundary layer flow without sliding it is assumed that is to say, the speed on wall border and side
Boundary's node speed component is all equal.
Some groups are tried to achieve on anticollision territory D and bridge pier characteristic width B and the stream of channel axis by above-mentioned model
The data of relation between fast U, the curve of D is fitted by gained point coordinates, so as to obtain straight channel rectangular pier anticollision neck
The empirical representation of domain D.
The result of the numerical computations of above-mentioned model such as following table：
According to the data of upper table, draw out curve map and see Fig. 1.As seen from Figure 1, straight channel rectangular pier anticollision field D
It is linear with the characteristic width B of bridge pier, and characteristic width B is bigger, then rectangular pier anticollision field D is bigger.This is mainly
Because the characteristic width B of bridge pier fluoran stream surface is bigger, current near bridge pier to stream scope also bigger, so as to cause bridge pier to exist
" pier inhales stream " scope on direction along ng a path is also bigger.Fig. 1 is also shown that straight channel rectangular pier anticollision field D is always flowed with navigation channel
Fast U is substantially into power exponent relation, and overall flow rate U is bigger, then rectangular pier anticollision field D is also bigger.This is primarily due to always flow
Fast U is bigger, and stream scope of the current near bridge pier also increases, so as to increase " pier inhales stream " scope.Song in fitted figure 1
Line, can obtain the empirical representation of following straight channel rectangular pier anticollision field D：D=(0.56B+0.26) U0.35.Above formula
Scope on probation be：The characteristic width B of bridge pier in the range of 0.5-4.5m, the flow velocity near bridge pier within 1m/s-6m/s, this
It is a discordant empirical equation of dimension, but has guiding value to Practical Project.
When between rectangular pier and channel entrance flow velocity U there are certain angle β (as shown in Figure 2), then under the conditions of oblique flow
Rectangular pier characteristic width B' can be expressed as：B '=Lsin β+Bcos β.In above formula：L is bridge pier length, and B is wide for bridge pier
Degree, β are angle of the navigation channel always between flow direction and bridge pier.From formula (6), the anticollision field of the rectangular pier under the conditions of oblique flow
For：D=[0.56 (Lsin β+Bcos β)+0.26] U0.35。
A kind of anticollision device of pier includes water flow sensing unit, several pressure sensors, several movement buoy, processors
Module, Pressure-type Water Spraying Device and buoy fixed disk, processor module are used to calculate the big of anticollision field D by empirical representation
Small, processing signal and control pressure formula water injector and buoy fixed disk；Water flow sensing unit is fixed on bridge pier, with processor
Module connects, and for measuring velocity magnitude and the direction of current, its data is used for the empirical representation of D；Pressure sensor is consolidated
It is scheduled on inside mobile buoy, is connected with processor module, for judges whether ship enters straight channel rectangular pier anticollision
The inside of field D；Buoy fixed disk is horizontally fixed on the bottom under bridge pier, including disk body and several carriages, slides dress
Put and move horizontally on disk body and be connected with processor module；Mobile buoy is filled by slip of the anchor chain anchorage in buoy fixed disk
Put, and the distance apart from bridge pier is changed by the slip of carriage；Pressure-type Water Spraying Device is fixed on the water surface of bridge pier
Lower section, including pressure chamber and water jet, are connected with processor module, and water jet is rotary type water jet, and water jet can be around bridge
Pier rotates, and the opening and closing of pressure chamber and the rotation direction of water jet are controlled by processor module, for entering inside anticollision field D
Ship base injcction water column.Pressure-type Water Spraying Device can also be replaced by air bag and pressure-type spray device of air, no
Implementation result is crossed be not as good as Pressure-type Water Spraying Device.In addition, pressure sensor can also be replaced by other sensors, such as add
Velocity sensor etc., but acceleration transducer as judge ship enter anticollision field D parameter foundation when, near bridge pier
When current convert suddenly, erroneous judgement is easily made, implementation result is good not as pressure sensor.
Carriage is guide tracked pulley gear, including some be fixed on disk are in using bridge pier center as the center of circle
Radial guide rail and several sliding motors, sliding motor move in guide rail, so as to drive mobile buoy close and away from bridge
Pier.
Anticollision device of pier carries out anticollision by following steps：
S1：Processor module obtains the size and Orientation of water velocity by water flow sensing unit, so that it is wide to calculate bridge pier feature
Spend the flow velocity U of B and channel axis, and the size of anticollision field D is calculated by the empirical representation of D；
S2：Mobile buoy is moved to the edge of anticollision field D by carriage；
S3：When the pressure sensor of multiple anticollision buoys in succession is sequentially generated pressure signal, it is determined as that ship is led into anticollision
Inside the D of domain and the position for first pressure sensor for producing signal is recorded, processor judges that ship enters anticollision field D；
S4：Water jet, is moved to the direction of first pressure sensor, then by processor module Opening pressure formula water injector
Pressure chamber is opened to the ship base injcction water column entered inside anticollision field D, and then reduces the size that pier inhales stream, forces ship
Away from bridge pier.
Embodiment described above is a kind of preferable scheme of the present invention, and not the present invention is made in any form
Limitation, also has other variations and remodeling on the premise of without departing from the technical solution described in claim.
Claims (6)
1. a kind of straight channel rectangular pier anticollision field determines method, suitable for rectangular pier, D is set as pier anticollision field
Scope, that is to say ultimate range of " pier the inhale stream " end point apart from bridge pier surface, the factor for influencing D be bridge pier characteristic width B and
The flow velocity U of channel axis, wherein, bridge pier characteristic width is bridge pier width in the maximum width perpendicular to current main flow direction, its spy
Sign is that the method for determining D is：The computation model of D is initially set up, numerical simulation then is carried out to above-mentioned computation model, finally
D is fitted with the change curve of bridge pier characteristic width B and the flow velocity U of channel axis with required data and draws the experience of D
Expression formula.
2. straight channel rectangular pier anticollision field according to claim 1 determines method, it is characterised in that the calculating
The RNGk- ε models that model uses, the governing equation group of the model include：
(1) mass-conservation equation (continuity equation)：I=1,2
(2) momentum conservation equation：I=1,2
(3) k- equations：I=1,2
(4) ε-equation：I=1,2
The implication of relevant parameter is in above equation group：xi(=x, y) represent the coordinate in axially and radially direction；ui(=ux,uy)
Represent the flow rate of water flow in axially and radially direction；ρ represents the density of current；P represents pressure；ν represents the dynamic viscosity of current；νt
Represent vortex viscosity, νt=Cμ(k2/ ε), k represents turbulent fluctuation energy, and ε represents disorderly kinetic energy dissipation rate, Cμ=0.085, the value of other specification
It is as follows：η=Sk/ ε, C1=1.42,ηo=4.377, λ=0.012,C2=1.68, αk=αε=1.39,
Wherein, boundary condition is handled in accordance with the following methods：
(1) boundary condition that becomes a mandarin becomes a mandarin, and mean flow rate, Turbulent Kinetic are distributed, dissipation turbulent kinetic energy is distributed, their mathematics
Expression formula is respectively：uin=U；K=0.0144U2；ε=k1.5/ (0.25b), wherein：U is channel entrance flow velocity, and b is wide for navigation channel
Degree；
(2) Outlet boundary processing method is as follows：It is assumed that go out stream fully development；
(3) wall boundary processing method is：Used in boundary layer flow without sliding it is assumed that is to say, the speed on wall border and side
Boundary's node speed component is all equal.
3. straight channel rectangular pier anticollision field according to claim 2 determines method and anticollision device of pier, it is special
Sign is, some groups are tried to achieve on anticollision territory D and bridge pier characteristic width B and navigation channel by the model in claim 2
The data of relation, the curve of D is fitted by gained point coordinates between the flow velocity U of axis, so as to obtain straight channel rectangle bridge
The empirical representation of pier anticollision field D.
4. a kind of anticollision device of pier, the experience table of the straight channel rectangular pier anticollision field D drawn in usage right requirement 3
Up to formula, it is characterised in that including water flow sensing unit, several pressure sensors, several movement buoy, processor module, pressures
Power formula water injector and buoy fixed disk,
The processor module is used for size, processing signal and the control pressure that anticollision field D is calculated by empirical representation
Formula water injector and buoy fixed disk；
The water flow sensing unit is fixed on bridge pier, is connected with processor module, for measuring velocity magnitude and the direction of current,
Its data is used for the empirical representation of D；
The pressure sensor is fixed on inside mobile buoy, is connected with processor module, for judging whether ship enters
The inside of straight channel rectangular pier anticollision field D；
The buoy fixed disk is horizontally fixed on the bottom under bridge pier, including disk body and several carriages, described to slide dress
Put and move horizontally on disk body and be connected with processor module；
The mobile buoy on the carriage of buoy fixed disk, and is changed by anchor chain anchorage by the slip of carriage
Become the distance apart from bridge pier；
The Pressure-type Water Spraying Device is fixed on below the water surface of bridge pier, including pressure chamber and water jet, is connected with processor module
Connect, the water jet is rotary type water jet, and water jet can be rotated around bridge pier, the opening and closing of the pressure chamber and turning for water jet
Dynamic direction is controlled by processor module, for the ship base injcction water column entered inside anticollision field D.
5. anticollision device of pier according to claim 4, it is characterised in that the carriage fills for guide tracked pulley
Put, including some be fixed on disk are in the radial guide rail and several sliding motors using bridge pier center as the center of circle, it is sliding
Dynamic motor moves in guide rail, so as to drive mobile buoy close and away from bridge pier.
6. according to the anticollision device of pier described in claim 3 or 4 or 5, it is characterised in that the anticollision device of pier by with
Lower step carries out anticollision：
S1：Processor module obtains the size and Orientation of water velocity by water flow sensing unit, so that it is wide to calculate bridge pier feature
Spend the flow velocity U of B and channel axis, and the size of anticollision field D is calculated by the empirical representation of D；
S2：Mobile buoy is moved to the edge of anticollision field D by carriage；
S3：When the pressure sensor of multiple anticollision buoys in succession is sequentially generated pressure signal, it is determined as that ship is led into anticollision
Inside the D of domain and the position for first pressure sensor for producing signal is recorded, processor judges that ship enters anticollision field D；
S4：Water jet, is moved to the direction of first pressure sensor, then by processor module Opening pressure formula water injector
Pressure chamber is opened to the ship base injcction water column entered inside anticollision field D, and then reduces the size that pier inhales stream, forces ship
Away from bridge pier.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112037582A (en) * | 2020-09-16 | 2020-12-04 | 浙江工业大学 | Cross-sea bridge ship collision early warning method based on risk prediction |
| CN114934481A (en) * | 2022-04-21 | 2022-08-23 | 重庆交通大学 | Ship collision prevention method for integrating three piers in wading |
| CN114973771A (en) * | 2022-04-15 | 2022-08-30 | 重庆交通大学 | Bridge active ship collision prevention method |
| CN114934481B (en) * | 2022-04-21 | 2024-06-07 | 重庆交通大学 | Trinity ship collision prevention and fortification method for wading bridge pier |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859518A (en) * | 2020-08-03 | 2020-10-30 | 交通运输部天津水运工程科学研究所 | Geometric-relation-based method for determining effective navigation clear width of oblique bridge navigation |
| CN112012096A (en) * | 2020-09-01 | 2020-12-01 | 郑州市交通规划勘察设计研究院 | Anti-collision pier structure and active anti-collision method |
| CN112037582A (en) * | 2020-09-16 | 2020-12-04 | 浙江工业大学 | Cross-sea bridge ship collision early warning method based on risk prediction |
| CN114973771A (en) * | 2022-04-15 | 2022-08-30 | 重庆交通大学 | Bridge active ship collision prevention method |
| GB2619406A (en) * | 2022-04-15 | 2023-12-06 | Univ Chongqing Jiaotong | Flow field intervention ship anti-collision method |
| CN114973771B (en) * | 2022-04-15 | 2024-02-09 | 重庆交通大学 | Active ship collision prevention method for bridge |
| CN114934481A (en) * | 2022-04-21 | 2022-08-23 | 重庆交通大学 | Ship collision prevention method for integrating three piers in wading |
| CN114934481B (en) * | 2022-04-21 | 2024-06-07 | 重庆交通大学 | Trinity ship collision prevention and fortification method for wading bridge pier |
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