CN110804942A - Liftable adjust wind protective screen - Google Patents
Liftable adjust wind protective screen Download PDFInfo
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- CN110804942A CN110804942A CN201911282358.7A CN201911282358A CN110804942A CN 110804942 A CN110804942 A CN 110804942A CN 201911282358 A CN201911282358 A CN 201911282358A CN 110804942 A CN110804942 A CN 110804942A
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- wind
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- wind barrier
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a liftable wind barrier capable of being adjusted, which comprises lifting structure columns for realizing lifting of a wind barrier and embedded structure columns for restraining longitudinal and transverse displacement of the wind barrier, wherein the lifting structure columns and the embedded structure columns are alternately arranged on two sides of a bridge road along the bridge driving direction, adjacent lifting structure columns and embedded structure columns are connected through connecting rods, the wind barrier is fixed on the connecting rods, wind barrier preventing strips are sequentially and transversely arranged on the wind barrier according to a certain height interval, and ventilation holes are uniformly arranged on the wind barrier preventing strips. The invention adopts two structure columns with different functions to be alternately arranged: the lifting structure column for lifting the wind barrier and the embedded structure column for restraining longitudinal and transverse displacement of the wind barrier are combined to achieve the purposes of adjusting the wind penetration rate of the barrier and controlling the function of cross wind on the bridge, so that the wind resistance of the vehicle and bridge structure is optimal, safety and high efficiency are achieved, economic benefits are obvious, and the wind barrier is suitable for popularization.
Description
Technical Field
The invention relates to a wind barrier, in particular to a liftable wind barrier.
Background
With the continuous promotion and innovation of bridge construction in China, the number and span of bridge construction in strong wind areas including coastal areas are continuously increased, and the influence of wind power on vehicles on bridges and even on bridge structures is more and more obvious. Under the strong wind environment, the running vehicles can be obviously subjected to the action of lift force in the vertical direction, thrust in the downwind direction and resistance in the running direction, and meanwhile, the bridge can further influence the on-bridge running vehicles due to vibration phenomena such as buffeting and vortex vibration. For special bridge types such as a cable-stayed bridge, a suspension bridge and the like, the wind field of the intersection part of the tower beams is very complex, and if proper wind prevention measures are not taken, the wind field will definitely form a great and unpredictable threat to the running vehicles.
In order to reduce the influence of vehicles under the action of lateral wind, mounting a wind barrier is an important means for improving the driving safety and the comfort, however, the existing wind barrier mostly takes the opening of a barrier entity as a main part, the cross-section wind permeability is fixed, the wind pressure borne by a bridge is increased when the wind is permeable, the safety of a running vehicle cannot be well ensured when the wind permeability is high, the wind barrier cannot work efficiently under different wind speeds, and the pneumatic performance of a vehicle and an axle system under the action of different wind loads cannot be optimized.
Disclosure of Invention
In order to solve the technical problem, the invention provides a lifting adjusting wind barrier which is simple in structure, safe and reliable.
The technical scheme for solving the problems is as follows: the utility model provides a liftable adjust wind protective screen, is including the vertical and lateral displacement's of the elevation structure post that is used for realizing wind protective screen lift, restraint wind protective screen embedding structure post, elevation structure post, embedding structure post are along bridge driving direction alternate arrangement in bridge road both sides, connect through the tie rod between adjacent elevation structure post, the embedding structure post, prevent wind the protective screen and be fixed in on the tie rod, prevent wind the barrier strip according to certain altitude interval transverse arrangement in proper order on the protective screen, prevent wind evenly arranged ventilation hole on the barrier strip.
In the wind barrier capable of being adjusted in a lifting manner, the lifting structure column and the embedded structure column respectively comprise a fixed part and a movable part, the movable part is movably arranged on the fixed part, and the fixed part is positioned on the inner side of a bridge road and is used for supporting and bearing the gravity from the movable part and the acting force generated by wind load; the movable part is positioned on the outer side of the bridge road and plays a role in changing the wind permeability of the wind barrier.
Above-mentioned liftable regulation wind barrier, the top of elevation structure post fixed part is provided with a motor and gear, and the motor drives the gear revolve, and elevation structure post movable part is equipped with the rack, realizes the lift transmission through the interlock of gear and rack.
Above-mentioned liftable regulation wind barrier, the fixed part of elevation structure post is provided with directional support tooth piece towards the movable part one side lower extreme, directional support tooth piece is connected with the spring structure who installs in elevation structure post fixed part, directional support tooth piece is the triangle of falling, when the movable part rises to a certain directional support tooth piece and just in time exposes, spring structure will pop out this directional support tooth piece automatically, the tooth piece is vertical direction unmovable, so bear the component force that the weight and the wind load that come from the movable part production of top acted on downwards, it is corresponding, when descending the movable part, pack up all directional support tooth pieces.
Above-mentioned liftable regulation wind barrier, the fixed part of embedding structure post is vertical to be equipped with the recess, and the recess cross section is trapezoidal cross section, and the movable part of embedding structure post is equipped with the arch correspondingly, and protruding structure cross section is the trapezoidal cross section that the shape size is the same with the recess cross section, through recess and bellied embedding cooperation, but the movable part and the fixed part sliding connection of embedding structure post restrict the wind barrier simultaneously and take place vertically and lateral displacement.
In the wind barrier capable of being adjusted in a lifting mode, the diameter of the connecting rod between the fixed portion of the lifting structural column and the fixed portion of the embedded structural column is larger than the diameter of the connecting rod between the movable portion of the lifting structural column and the movable portion of the embedded structural column.
The wind barrier can be adjusted in a lifting mode and is of a steel plate-shaped structure.
According to the liftable wind barrier, the wind barrier strip is plate-shaped and is made of opaque light metal materials or transparent high-strength resin materials.
Above-mentioned liftable regulation wind barrier, the ventilation hole is circular.
The invention has the beneficial effects that: the invention adopts two structure columns with different functions to be alternately arranged: the lifting structure column for lifting the wind barrier and the embedded structure column for restraining longitudinal and transverse displacement of the wind barrier are combined to achieve the purposes of adjusting the wind penetration rate of the barrier and controlling the function of cross wind on the bridge, so that the wind resistance of the vehicle and bridge structure is optimal, safety and high efficiency are achieved, economic benefits are obvious, and the wind barrier is suitable for popularization.
Drawings
FIG. 1 is an inside view of a lift structure post and an embedment structure post of an embodiment of the invention.
Fig. 2 is an outside view of a lift structure post and an embedment structure post of an embodiment of the invention.
FIG. 3 is an inside view of a structural column of an embodiment of the present invention after attachment of a tie rod.
FIG. 4 is an outside view of a structural column of an embodiment of the present invention after attachment of a tie rod.
FIG. 5 is a front view of a wind barrier according to an embodiment of the present invention.
FIG. 6 is an interior side view of a segment of a wind barrier according to an embodiment of the present invention.
FIG. 7 is an exterior side view of a segment of a wind barrier according to an embodiment of the present invention.
FIG. 8 is a diagram of the experimental results of rollover moment coefficients of a large container vehicle with different air permeabilities.
FIG. 9 is a graph showing the experimental results of different air permeability lateral force coefficients of a large container vehicle.
FIG. 10 is a diagram of the results of rollover moment coefficients of van trucks with different air permeabilities.
Fig. 11 is a graph of experimental results of lateral force coefficients of different air permeability of the van.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1-7, a liftable regulation wind barrier, including the vertical and lateral displacement's that is used for realizing the lift structure post 1, restraint wind barrier that the wind barrier goes up and down embedding structure post 2, lift structure post 1, embedding structure post 2 arrange in bridge road both sides along bridge driving direction alternate, connect through connecting rod 5 between adjacent lift structure post 1, the embedding structure post 2, on the wind barrier was fixed in connecting rod 5, wind barrier strip 7 was prevent wind to horizontal arrangement in proper order according to certain altitude interval on the wind barrier, evenly arranged ventilation hole 10 on the wind barrier strip 7.
The lifting structural column 1 and the embedded structural column 2 respectively comprise a fixed part and a movable part, the movable part is movably arranged on the fixed part, the fixed part is positioned on the inner side of a bridge road, and is welded on the bridge by adopting steel materials and used for supporting and bearing the gravity from the movable part and the acting force generated by wind load; the movable part is positioned on the outer side of the bridge road and made of light high-strength alloy materials, and the effect of changing the ventilation rate of the wind barrier is achieved.
The top end of the fixed part of the lifting structure column 1 is provided with a motor 4 and a gear, the motor 4 drives the gear to rotate, the movable part of the lifting structure column 1 is provided with a rack 3, and lifting transmission is realized through meshing of the gear and the rack 3.
1 fixed part of elevation structure post is provided with directional support tooth piece towards activity part one side lower extreme, and every 5cm arranges two directional support tooth pieces 8, and directional support tooth piece 8 is connected with the spring structure who installs in 1 fixed part of elevation structure post, and directional support tooth piece 8 is three horn shapes of chamfer, and elevation structure post 1 is hugged closely to a right-angle side, and another right-angle side vertical lift structure post 1, hypotenuse and elevation structure post 1 are 40 degrees contained angles. When the movable part rises to a certain directional supporting tooth block 8 and just exposes, the spring structure automatically pops up the directional supporting tooth block 8, the tooth block is not movable in the vertical direction, so the downward component force of gravity and wind load generated by the upper movable part is borne, and correspondingly, when the movable part descends, all the directional supporting tooth blocks 8 are folded. The spring structure can adopt a spring, one end of the spring is positioned in the column body of the lifting structure column 1, the other end of the spring is connected with the directional supporting tooth block 8, and the directional supporting tooth block 8 can compress the spring and is arranged in the column body under the action of pressure.
The fixed part of embedding structure post 2 is vertical to be equipped with recess 9, and the recess 9 cross section is trapezoidal cross section, and the movable part of embedding structure post 2 is equipped with arch 6 correspondingly, and arch 6 structure cross section is the trapezoidal cross section that the shape size is the same with recess 9 cross section, and through the embedding cooperation of recess 9 and arch 6, the movable part and the fixed part sliding connection of embedding structure post 2 restrict the wind barrier and take place vertical and lateral displacement simultaneously.
The adjacent lifting structure columns 1 and the embedded structure columns 2 are connected through the connecting rods 5, the connecting rods 5 transmit the lifting effect of the structure columns and are also used as fixing devices of the wind barrier preventing strips 7, and the diameter of the connecting rods 5 between the fixing parts of the lifting structure columns 1 and the fixing parts of the embedded structure columns 2 is larger than that of the connecting rods 5 between the movable parts of the lifting structure columns 1 and the movable parts of the embedded structure columns 2 in consideration of the gravity factor of a wind barrier.
The windproof barrier is of a steel plate-shaped structure, the windproof barrier strip 7 is of a plate shape and is made of opaque light metal materials or transparent high-strength resin materials.
When the wind shield is used in a strong wind weather, the motor 4 is rotated forwardly and rotates at a slow speed, the rack 3 is driven by the rotation of the gear on the motor, the steel connecting rod 5 connected with the rack rises along with the rack, and the wind shield integrally rises, so that the aim of changing the ventilation rate is fulfilled; when the height of the wind barrier needs to be lowered, the directional supporting tooth blocks 8 are firstly retracted, then the motor 4 reversely rotates to provide power, the wind barrier slowly lowers, the upper part and the lower part of the embedded structural column 2 are always meshed together in the whole process, the possibility of transverse void under the action of wind power is overcome due to the trapezoidal section, and meanwhile, the structure can only be displaced in the vertical direction. Therefore, the actual ventilation rate of the wind barrier can be easily calculated, the actual ventilation rate can be obtained according to the ratio of the effective total area of the vent holes 10 and the gaps to the total working area of the wind shield, the ventilation rate is determined according to actual requirements, so that the wind barrier works in the optimal and most efficient mode, and the running safety of running vehicles is well guaranteed while the pneumatic performance of the vehicle and axle coupling system under the action of different wind loads is optimal.
The experimental bridge section model adopts a model of 1: the geometric scale ratio of 40, the total length of the model is 2.4m, the total width is 0.685m, the total height is 0.07m, and the bridge deck is divided into lanes 1-6 from the windward side to the leeward side in sequence. The crosswind effect is provided by the wind tunnel laboratory of Hunan science and technology university, and the wind barrier model also adopts 1: 40 geometric scale ratio. According to the design of the invention, the actual wind barrier air permeability is continuously adjustable within 0.4-0.571 m, the actual wind barrier height is continuously adjustable within 3.0-4.2 m, and the corresponding table of the wind barrier height and the air permeability under different working conditions is shown in table 1.
TABLE 1
The wind tunnel experiment is based on the side projection area As and the gravity center height h of the measuring vehiclev(the distance from the center of gravity of the vehicle to the deck) defines its aerodynamic coefficient expression:
in the above formula, CSIs the coefficient of lateral force, FSFor lateral forces, MRIn order to generate the side-turning moment,as is the side-projected area of the measuring vehicle, hvTo measure the height of the center of gravity of the vehicle. Wherein q is an intermediate variable, and q is 0.5 rho U2U is the average wind speed or the speed of the automobile relative to the wind, 16m/s is taken, rho is the air density and the value is 1.225kg/m3。
The vehicle model scale ratio is 1: 40. test model gravity center height h of van and large container vehicleV(distances from the gravity center of the vehicle to the bridge deck) are 35.05mm and 42.49mm, respectively, and the side projected areas As of the vehicle are 12068.12mm, respectively2、26934.80mm2. Lateral force FSSide turning moment MRMeasured by a six-component force balance (ATI-Mini 40).
The inventionUnder the conditions of no wind barrier and liftable wind barrier adjustment, wind tunnel experiments are respectively carried out on 6 lanes in total for the same van or large container vehicle, and the lateral force coefficient C is aimed atSCoefficient of side turning moment
The experimental results are shown in FIGS. 8 to 11.
The experimental data are processed, and the experimental results are analyzed, so that the following results can be shown: when no wind screen exists, the maximum lateral force coefficient C of the model on the bridgeS(1 lane) is about 0.9-1.0, and the maximum rollover moment coefficient
The (1 lane) is about 0.41-0.53, and the maximum lateral force coefficient C is obtained after the lifting adjusting wind barrier is installedSReduced to about 0.25 and maximum rollover moment coefficient
The aerodynamic coefficients of the lanes 1-3 are obviously reduced in a decreasing rule, and the aerodynamic coefficients of the lanes 4-6 are fluctuated between the lanes 2 and 3, probably because the wind barriers on the leeward side have a certain effect on the model on the bridge, because the aerodynamic coefficients of the lanes 1-3 are obviously reduced in a decreasing rule, the two coefficients are reduced in a certain rule along with the reduction of the wind penetration rate of the wind barriers and the decreasing trend of the two coefficients are influenced by the change of the number of the lanes.
Claims (9)
1. The utility model provides a liftable adjust wind barrier which characterized in that: including the embedded structure post that is used for realizing the vertical and lateral displacement of elevation structure post, the restraint wind protective screen of wind barrier lift, elevation structure post, embedded structure post are arranged in bridge road both sides along bridge driving direction alternate, connect through the connecting rod between adjacent elevation structure post, the embedded structure post, prevent wind on the protective screen is fixed in the connecting rod, prevent wind on the protective screen according to certain altitude interval transverse arrangement in proper order and prevent wind barrier strip, prevent wind evenly arranged ventilation hole on the barrier strip.
2. The liftable adjust wind barrier of claim 1, characterized in that: the lifting structural column and the embedded structural column respectively comprise a fixed part and a movable part, the movable part is movably arranged on the fixed part, and the fixed part is positioned on the inner side of the bridge road and is used for supporting and bearing the gravity from the movable part and the acting force generated by wind load; the movable part is positioned on the outer side of the bridge road and plays a role in changing the wind permeability of the wind barrier.
3. The liftable adjust wind barrier of claim 2, characterized in that: the top end of the fixed part of the lifting structure column is provided with a motor and a gear, the motor drives the gear to rotate, the movable part of the lifting structure column is provided with a rack, and lifting transmission is realized through meshing of the gear and the rack.
4. The liftable adjust wind barrier of claim 3, characterized in that: the lower end of one side of the fixed part of the lifting structure column, which faces the movable part, is provided with a directional supporting tooth block, the directional supporting tooth block is connected with a spring structure arranged in the fixed part of the lifting structure column, when the movable part rises to just expose a certain directional supporting tooth block, the spring structure automatically pops out the directional supporting tooth block, the tooth block is not movable in the vertical direction, so that the directional supporting tooth block bears the component force of the gravity and the wind load generated by the upper movable part, and correspondingly, when the movable part descends, all the directional supporting tooth blocks are folded.
5. The liftable adjust wind barrier of claim 2, characterized in that: the fixed part of the embedded structure column is vertically provided with a groove, the cross section of the groove is a trapezoidal section, the movable part of the embedded structure column is correspondingly provided with a protrusion, the cross section of the protrusion structure is a trapezoidal section with the same shape and size as the cross section of the groove, and through the embedding matching of the groove and the protrusion, the movable part of the embedded structure column is slidably connected with the fixed part, and meanwhile, the wind barrier is limited from longitudinally and transversely displacing.
6. The liftable adjust wind barrier of claim 2, characterized in that: the diameter of the connecting rod between the fixed part of the lifting structure column and the fixed part of the embedded structure column is larger than the diameter of the connecting rod between the movable part of the lifting structure column and the movable part of the embedded structure column.
7. The liftable adjust wind barrier of claim 2, characterized in that: the wind-proof barrier is of a steel plate-shaped structure.
8. The liftable adjust wind barrier of claim 1, characterized in that: the wind barrier strip is plate-shaped and is made of opaque light metal materials or transparent high-strength resin materials.
9. The longitudinally telescopically adjustable wind barrier of claim 1, wherein: the vent holes are circular.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911282358.7A CN110804942A (en) | 2019-12-13 | 2019-12-13 | Liftable adjust wind protective screen |
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| CN201911282358.7A CN110804942A (en) | 2019-12-13 | 2019-12-13 | Liftable adjust wind protective screen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111831012A (en) * | 2020-07-03 | 2020-10-27 | 长沙理工大学 | Intelligent adjustable air barrier system on bridge and control method thereof |
| CN111896218A (en) * | 2020-07-27 | 2020-11-06 | 中铁大桥勘测设计院集团有限公司 | Method for verifying windmill bridge coupling system of porous full-scale wind barrier model |
| CN112360229A (en) * | 2020-10-29 | 2021-02-12 | 中国电建集团华东勘测设计研究院有限公司 | Foldable sound insulation barrier enclosure combined structure in construction period and mounting method |
| CN113026523A (en) * | 2021-03-29 | 2021-06-25 | 深圳大学 | Wind-resistant flow guide device for box girder bridge and implementation method thereof |
| CN114045763A (en) * | 2021-12-27 | 2022-02-15 | 重庆交通大学 | Unilateral wind-proof sound barrier device for bridge |
| CN114808779A (en) * | 2022-04-17 | 2022-07-29 | 石家庄铁道大学 | Double-layer staggered porous sound barrier device with active tuning wind load function |
-
2019
- 2019-12-13 CN CN201911282358.7A patent/CN110804942A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111831012A (en) * | 2020-07-03 | 2020-10-27 | 长沙理工大学 | Intelligent adjustable air barrier system on bridge and control method thereof |
| CN111831012B (en) * | 2020-07-03 | 2023-09-05 | 长沙理工大学 | Intelligent adjustable wind barrier system on bridge and control method thereof |
| CN111896218A (en) * | 2020-07-27 | 2020-11-06 | 中铁大桥勘测设计院集团有限公司 | Method for verifying windmill bridge coupling system of porous full-scale wind barrier model |
| CN112360229A (en) * | 2020-10-29 | 2021-02-12 | 中国电建集团华东勘测设计研究院有限公司 | Foldable sound insulation barrier enclosure combined structure in construction period and mounting method |
| CN113026523A (en) * | 2021-03-29 | 2021-06-25 | 深圳大学 | Wind-resistant flow guide device for box girder bridge and implementation method thereof |
| CN114045763A (en) * | 2021-12-27 | 2022-02-15 | 重庆交通大学 | Unilateral wind-proof sound barrier device for bridge |
| CN114808779A (en) * | 2022-04-17 | 2022-07-29 | 石家庄铁道大学 | Double-layer staggered porous sound barrier device with active tuning wind load function |
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