CN112012096B - Anti-collision pier structure and active anti-collision method - Google Patents
Anti-collision pier structure and active anti-collision method Download PDFInfo
- Publication number
- CN112012096B CN112012096B CN202010905017.7A CN202010905017A CN112012096B CN 112012096 B CN112012096 B CN 112012096B CN 202010905017 A CN202010905017 A CN 202010905017A CN 112012096 B CN112012096 B CN 112012096B
- Authority
- CN
- China
- Prior art keywords
- pressure
- pier
- water
- ship
- collision
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 248
- 239000007921 spray Substances 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000005507 spraying Methods 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 238000007667 floating Methods 0.000 claims description 61
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 8
- 238000013459 approach Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 230000006378 damage Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000002018 water-jet injection Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- 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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/26—Fenders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Structural Engineering (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an anti-collision pier structure, wherein a detection water spraying mechanism is respectively arranged on the upstream surface and the downstream surface of a pier, and comprises a laser range finder, a laser velocimeter and a plurality of high-pressure spray heads; a high-pressure water tank is arranged on the riverbed at the pier and connected with a high-pressure variable-frequency water pump, and the high-pressure variable-frequency water pump is connected with a water inlet pipe; each high-pressure spray head is connected with a high-pressure water tank through a high-pressure water supply hose, and a pressure sensor is arranged in the high-pressure water tank; the top of the pier is provided with a waterproof box, an electric control device is arranged in the waterproof box, and the laser range finder, the laser speedometer, the high-voltage variable-frequency water pump and the pressure sensor are all connected with the electric control device. The invention also discloses a corresponding active anti-collision method. The invention provides an active anti-collision technology, which gradually counteracts the collision energy of a ship through water jet, converts the instant collision of the ship hitting a bridge into long-time water-jet anti-collision, and reduces the acting force on a bridge pier in unit time by prolonging the anti-collision acting time, thereby effectively protecting the bridge pier.
Description
Technical Field
The invention relates to the technical field of bridge engineering.
Background
The bridge structure is divided into an upper structure and a lower structure, wherein the main body of the upper structure is a bridge deck structure which is a structure for the bridge to span a space and bear the gravity of an added object thereon. The substructure is a structure that supports the superstructure and transmits the force transmitted from the superstructure to the foundation. The bridge deck structure can adopt structures such as prestressed concrete hollow slabs or box girders.
The bridge substructure comprises bridge piers, bearing platforms and pile foundations. The bridge pier is a middle supporting structure of a multi-span bridge and bears vertical force and horizontal force transmitted by upper structures of two adjacent spans. The pier is also subjected to wind and water pressure.
In recent years, as more cross-river bridges are built in China, a plurality of cross-channel bridges exist in Yangtze river systems, Zhujiang river systems, Songhua river systems and various gulfs; in addition, the ship transportation industry in China develops rapidly, so that the phenomenon that ships hit a bridge sometimes occurs. For example, 7.7.2020, Shangxi Shanghai, Poyang Sun Pou bridge is bumped by a gravel boat on the bridge pier, and related departments have closed traffic. For example, the data of the Wuhan Changjiang river bridge is up to 2014, the bridge is impacted for more than 70 times in 57 years, and the bridge pier is impacted for the rest times except for 3 times of impacting the upper structure of the bridge. More than 20 ship collision accidents occur in 3 years after the Huangshi Changjiang river highway bridge is built, and all the accidents are collision piers.
The bridge collision accident of the ship is that the ship collides with a bridge pier, not only can damage the bridge, but also can damage the ship, often causes serious economic loss, and even can endanger the personal safety of people. Therefore, the collision avoidance pier technology has been widely studied.
Fiber reinforced polymer/plastic (FRP) is a high-performance material formed by mixing fiber materials with matrix materials in a certain proportion and compounding the mixture by a process, has the advantages of high strength, light weight, corrosion resistance and the like, and is increasingly widely applied to civil engineering and building engineering structures in recent years. The FRP product is convenient to form, the shape is convenient to flexibly design, the FRP product has good elasticity, the stress-strain curve is close to linear elasticity, and the FRP product can be restored to the original shape after being greatly deformed. Therefore, the FRP product is also applied to the protection of piers.
Use FRP material or flotation tank around the pier, can play certain crashproof guard action to the pier, but this kind of effect is passive, only takes effect when the ship striking comes, and the pier is inevitable still to bear great impact.
Active collision avoidance refers to the onset of action before the vessel strikes. The inventor originally imagines that a propeller and a motor are arranged at the lower part of a pier (below the navigation water level) and active collision avoidance is carried out by providing reverse thrust for a ship, but the inventor quickly finds that the active collision avoidance is unrealistic and cannot play a role in active collision avoidance. This is because: every partial reaction force obtained by the propeller on the ship in rotation can be 100% transmitted to the ship body as the advancing power, because the propeller on the ship is directly connected with the ship body, and the reaction force of water received by the propeller can be seamlessly transmitted. In contrast, the propeller installed at the pier can bear 100% of the reaction force from the water body, which is applied to the propeller during rotation, only by the pier due to the same direct connection, and the water forms a forward water flow after being applied to the force of the propeller, which is called an anti-collision water flow; the anti-collision water flow is disturbed and dispersed continuously when advancing in the water body, and even when the anti-collision water flow does not reach a ship at a distance, the anti-collision water flow is dissipated. The momentum and kinetic energy of the water flow is limited in unit time, so that the ship cannot stop or effectively deviate in a short time, and when the ship approaches a pier and enters an action area of the water flow, the water flow cannot effectively stop or deviate the ship before the ship collides. Therefore, the scheme of installing the propeller at the pier cannot achieve the purpose of effective active collision avoidance.
Disclosure of Invention
The invention aims to provide an anti-collision pier, which can perform effective active anti-collision operation before collision.
In order to achieve the purpose, the invention discloses an anti-collision bridge pier structure, wherein a pier cap for supporting an upper structure of a bridge is arranged at the top of the bridge pier, the bottom end of the bridge pier is supported on a bearing platform, and the bearing platform is downwards supported on a foundation through a pile foundation;
the upstream surface and the downstream surface of the pier are respectively provided with a detection water spraying mechanism, and the detection water spraying mechanism comprises a laser range finder, a laser velocimeter and a plurality of high-pressure nozzles; the spraying direction of each high-pressure sprayer deviates from the pier; the diameter of the spray hole of each high-pressure spray head is 10 +/-3 cm;
the laser range finder is used for measuring the distance between the ship and the bridge pier; the laser velocimeter is used for measuring the speed of the ship relative to the bridge pier; the speed of the ship approaching the bridge piers is a positive value, and the speed of the ship far away from the bridge piers is a negative value;
a high-pressure water tank is arranged on a riverbed at the pier, the high-pressure water tank is connected with a high-pressure variable-frequency water pump for injecting high-pressure water into the high-pressure water tank, the high-pressure variable-frequency water pump is connected with a water inlet pipe, and a filter screen is arranged at the water inlet of the water inlet pipe;
each high-pressure spray head is connected with a high-pressure water tank through a high-pressure water supply hose, and a pressure sensor is arranged in the high-pressure water tank; a waterproof box is arranged at the top of the bridge pier, an electric control device is arranged in the waterproof box, and the laser range finder, the laser speedometer, the high-voltage variable-frequency water pump and the pressure sensor are all connected with the electric control device;
each high-pressure spray head is respectively connected with a high-pressure spray hose for reducing the energy dissipation of the water jet, and the length of the high-pressure spray hose is 3-10 m.
The upstream surface and the downstream surface of the pier are both provided with a guide rail and a floating lifting mechanism which floats up and down along the guide rail; taking the direction pointing to the bridge pier as inward direction and the direction departing from the bridge pier as outward direction;
the guide rail and the bridge pier are integrally arranged, the guide rail protrudes out of the surface of the bridge pier, and the horizontal section of the outer end part of the guide rail is T-shaped;
the floating lifting mechanism comprises a floating base plate, the middle lower part of the floating base plate is provided with a cavity for increasing buoyancy, the upper part of the floating base plate is provided with a solid part, and the detection water spraying mechanism is arranged on the solid part of the floating base plate; the inner surface of the floating base plate is vertically provided with a T-shaped groove matched with the guide rail in a sliding manner.
The floating lifting mechanism is provided with a waterline when floating in water, the detection water spraying mechanism is arranged on the floating base plate above the waterline, and each high-pressure spray head is 20 +/-5 centimeters higher than the waterline.
Two sets of detection water spraying mechanisms are symmetrically arranged on each floating substrate from left to right, the direction perpendicular to the surface of the pier is taken as the vertical direction, the spraying direction of a high-pressure spray head in the detection water spraying mechanism on the left side of the floating substrate deviates from the vertical direction towards the left by 1-4 degrees, and the spraying direction of a high-pressure spray head in the detection water spraying mechanism on the right side of the floating substrate deviates from the vertical direction towards the right by 1-4 degrees;
the left-right symmetrical line on the horizontal section of the bridge pier is called a center line, the measuring range of the laser range finder and the laser speed meter in the detection water spray mechanism on the left side of the floating substrate is an outer region of the bridge pier enclosed between the center line of the bridge pier and the left side of the bridge pier, and the measuring range of the laser range finder and the laser speed meter in the detection water spray mechanism on the right side of the floating substrate is an outer region of the bridge pier enclosed between the center line of the laser range finder and the laser speed meter and the right side of the bridge pier; the distance from the farthest end of the measurement range to the bridge pier is 100 meters.
The front surface and the back surface of the pier are respectively and fixedly connected with an anti-collision block made of FRP materials, metal plates are respectively embedded in the pier at positions close to the front surface and the back surface of the pier, a plurality of bolts are welded on the metal plates, and the bolts extend into the anti-collision block and are fixedly connected with the anti-collision block;
two rows of anti-collision blocks are symmetrically arranged on the upstream surface and the downstream surface of the pier left and right, and each row comprises a plurality of anti-collision blocks which are uniformly arranged along the vertical direction at intervals; the guide rail is positioned between the two rows of anti-collision blocks; the floating base plate is in sliding fit with the anti-collision block.
A walking wheel is arranged on the surface of one side of the floating substrate facing the pier, and the walking wheel is in rolling fit with the surface of the pier; the left and right of the walking wheels are symmetrically provided with two walking wheels.
The detection water spraying mechanisms at a plurality of bridge piers of the bridge share one high-pressure water tank, and the high-pressure spray nozzles at the bridge piers are connected with the high-pressure water tank.
The invention also discloses an active anti-collision method using the anti-collision pier structure, which comprises the following steps:
the preparation work is as follows: after the anti-collision pier structure is installed at a pier, acquiring corresponding information of pressure and jet distance, and storing the corresponding information in a memory built in an electric control device;
the first step is to raise the pressure;
when a ship enters a measuring range at the left side or the right side of a bridge pier and approaches the bridge pier, a laser range finder in a water spray detecting mechanism at the left side or the right side of the floating substrate detects distance information, and meanwhile, a laser speed meter detects speed information; the electric control device receives the distance information and the speed information;
when the speed information is negative, the ship is far away from the bridge pier, and the electric control device controls the high-pressure variable-frequency water pump to keep a stop state and controls each high-pressure spray head to keep a closed state at the same time;
when the speed information is positive, the ship is close to the bridge pier, the laser range finder detects that the distance information is d meters, and the electric control device performs the operation of obtaining the target pressure P1: taking the jet distance with the smallest numerical value in the jet distances which are more than or equal to d +25 meters and stored in the memory as a target jet distance; the electric control device takes a pressure value corresponding to the target jet distance as a target pressure P1 according to the corresponding information of the pressure and the jet distance;
the electric control device opens the high-pressure variable-frequency water pump, injects water into the high-pressure water tank and raises the pressure in the high-pressure water tank until the pressure in the high-pressure water tank is kept at P1 +/-0.1 MPa;
the second step is water jet collision avoidance;
opening a high-pressure nozzle of a water spray detection mechanism for detecting that the ship approaches, spraying water jet to the ship approaching the bridge pier, slowing the speed of the ship and promoting the ship to deviate from the bridge pier; in the process of spraying water by the high-pressure spray head; the electric control device continuously obtains the speed of the ship approaching the bridge pier through the laser velocimeter;
when the speed of the ship is greater than zero, the electric control device obtains the distance between the ship and the bridge pier once every 0.5 second through the laser distance meter, and obtains a target pressure P1 according to the distance, obtains an updated target pressure P1 value, and correspondingly keeps the pressure in the high-pressure water tank at P1 +/-0.1 MPa through the high-pressure variable-frequency water pump; when the pressure P1 is less than or equal to 1MPa, the electric control device keeps the pressure in the high-pressure water tank at 1 +/-0.1 MPa through the high-pressure variable-frequency water pump;
and continuously carrying out the second step until the ship speed is less than or equal to zero or the ship distance information cannot be detected, and controlling the high-pressure spray head and the high-pressure variable-frequency water pump to stop working by the electric control device to finish the active anti-collision operation.
The preparation work is specifically as follows:
a worker starts the high-pressure variable-frequency water pump through the electric control device, fills water into the high-pressure water tank and raises the pressure in the high-pressure water tank; keeping the water spraying detection mechanism higher than the water surface of the pier,
when the pressure in the high-pressure water tank rises by 0.1MPa from the water pressure of 1MPa, maintaining the pressure, opening the high-pressure nozzles one by one, measuring and recording the average jet distance X meters of the high-pressure nozzles under the pressure, closing the high-pressure nozzles one by one, then continuing to raise the pressure in the water tank by 0.1MPa, and repeatedly measuring and recording the corresponding relation between the pressure and the average jet distance until the value of X is more than or equal to 125.
And electromagnetic valves are respectively arranged at the high-pressure nozzles, and when the high-pressure nozzles are opened, the corresponding electromagnetic valves are slowly opened, so that the inside of the high-pressure injection hose is gradually boosted and gradually extended along the injection direction.
The invention has the following advantages:
the invention innovatively provides an active anti-collision technology, and the impact energy of a ship with possible impact is gradually counteracted through water jet. When the pressure in the high-pressure water tank is kept at P1 + -0.1 MPa, the speed of the water jet sprayed on the ship is basically more than 10 times of the speed of the ship. As is well known, the kinetic energy E is 0.5mv2The speed of the ship passing through the bridge is very low, the speed of the water jet can easily reach more than 10 times of the speed of the ship, and the kinetic energy of the water jet in unit mass is 100 times of the kinetic energy of the ship body in unit mass at the same speed, so that the kinetic energy of the ship can be completely offset as long as the total mass of water continuously sprayed on the ship is one percent or even less than the total mass of the ship (the ship advances to consume the kinetic energy, 10 times are conservative numbers, and the water jet speed has a high probability of exceeding 10 times of the speed of the ship). Even if the kinetic energy of the ship is not completely offset due to insufficient water injection amount, the kinetic energy of the ship is greatly reduced, and good conditions are created for ensuring the safety of the pier for the traditional passive collision avoidance of the FRP.
The invention converts the instant impact of a ship hitting a bridge into long-time water spraying collision avoidance, and reduces the acting force on the bridge pier in unit time by prolonging the collision avoidance acting time, thereby effectively protecting the bridge pier. In the past, a ship collides with a pier, the collision occurs within one second, and the pier is easily damaged due to huge and violent impact force. During the active water spraying anti-collision period, the pier continuously receives the counterforce and disperses dozens of times of energy impact received by the pier within one second, so that the pier is effectively protected.
The energy loss per unit distance of the water jet in air is smaller than the energy loss per unit distance of the water jet in water. If the height of the water jet is set to be too high, the water jet can be guaranteed to be sprayed in the air, but the water jet cannot be guaranteed to be sprayed close to the water surface, and if the position of the water jet on the ship is too high, the water jet can be sprayed on the deck to threaten personnel articles, and on the other hand, the water jet is sprayed at a higher position of the ship to easily cause uneven stress and instability of the ship.
The invention ensures that the position of the water jet is close to the water surface and above the water surface through the floating lifting mechanism and the guide rail, thereby ensuring that the water jet is sprayed in the air and on the hull of the ship on the water surface, and the ship is stressed more stably.
The high-pressure jet hose greatly reduces the energy dissipation of the water jet when the water jet advances (the energy of the water jet cannot be consumed by ambient gas or water in the high-pressure jet hose), so that more energy of the water jet is concentrated on a target ship, and the target ship can be stopped or deviated from a bridge pier more quickly and effectively.
When the floating lifting mechanism fails and water jet injection is carried out underwater, the high-pressure injection hose can greatly reduce the weakening degree of environmental fluid on the water jet energy.
In the length range of the high-pressure injection hose, on one hand, the high-pressure injection hose can restrain the water jet from diffusing in the radial direction, so that the resistance met in an injection path is reduced due to the reduction of the sectional area of the water jet, on the other hand, the high-pressure injection hose can isolate the water flow from the environmental fluid (air or water), so that the water jet is prevented from being blocked due to the disturbance between the environmental fluid and the water jet, and the resistance in the water injection process is greatly reduced.
Through the sliding insertion fit of the T-shaped groove and the T-shaped guide rail, the floating lifting mechanism can be ensured to float only in the vertical direction. The structure of the floating substrate utilizes the cavity to increase the overall buoyancy, and utilizes the structural strength of the solid part to support the reaction force when jetting the water jet, thereby meeting the requirements of increasing the buoyancy and ensuring the structural strength.
Detect water spray mechanism and set up on the unsteady base plate of waterline top, can guarantee that each high pressure nozzle all just in time is higher than the surface of water (navigation water level) under normal conditions to make the water jet both be higher than the surface of water, press close to the surface of water again, spout to the ship in the position of pressing close to the surface of water, both utilized the air for the low resistance characteristic of water, guaranteed again that the injection position is located the middle part position of ship upper and lower direction, can not cause the harm to personnel and article on the ship deck.
The spraying direction of the high-pressure spray head deviates from the vertical direction, the ship can be applied with the force for stopping approaching to the pier along the direction vertical to the surface of the pier, the ship can be applied with the force parallel to the surface of the pier, the course of the ship gradually deviates from the pier, and even if the ship is finally contacted with the pier, the ship is contacted in the inclined direction. The destructive force of the oblique collision to the bridge pier is far less than that of the vertical collision to the bridge pier, so that the bridge pier is further protected.
The FRP material has good elasticity, is not easy to damage after being contacted with water for a long time, and can absorb more impact energy when being impacted and damaged. The anti-collision block is arranged, so that the excellent characteristics of the FRP material are utilized to buffer and absorb the collision energy of the ship in case of collision accident to the bridge pier, and the bridge pier can be further protected.
The walking wheels are arranged, so that when the floating substrate receives the reaction force of the water jet, the reaction force (through the walking wheels, the guide rails and the anti-collision blocks) can be more stably and uniformly transmitted to the bridge pier.
The active anti-collision method can give full play to the advantages of an anti-collision pier structure, on one hand, the coming ship is forced to decelerate, on the other hand, the inclined high-pressure spray head continuously applies the force deviating from the pier to the coming ship, and the good active anti-collision function is realized.
When the high-pressure nozzle is opened, the corresponding electromagnetic valve is slowly opened, so that the extension speed of the high-pressure injection hose can be reduced, and the high-pressure injection hose is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention; in order to keep the drawing clear, the high-pressure nozzles are not shown in fig. 1;
FIG. 2 is a schematic sectional view A-A of FIG. 1 with the respective high pressure jets closed;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1 when the high pressure nozzle is opened at one side of the pier;
fig. 4 is a control schematic of the present invention.
Detailed Description
As shown in fig. 1 to 4, the invention provides an anti-collision pier structure, wherein a pier cap 3 for supporting a bridge superstructure 1 is arranged at the top of a pier 2, the bottom end of the pier 2 is supported on a bearing platform 4, and the bearing platform 4 is supported on a foundation downwards through a pile foundation 5;
the upstream surface and the downstream surface of the pier 2 are respectively provided with a detection water spraying mechanism, the detection water spraying mechanism comprises a laser range finder 6, a laser velocimeter 7 and a plurality of high-pressure nozzles 8, and the high-pressure nozzles 8 are electromagnetic nozzles; the spraying direction of each high-pressure sprayer 8 deviates from the pier 2; the diameter of the spray hole of each high-pressure spray head 8 is 10 +/-3 cm;
the laser range finder 6 is used for measuring the distance between the ship and the pier 2 (the electric control device 9 is pre-stored with the distance between the laser range finder 6 and the surface of the pier 2, so that the measured data of the laser range finder 6 can be automatically corrected to obtain the accurate distance between the ship and the pier 2); the laser velocimeter 7 is used for measuring the speed of the ship relative to the bridge pier 2; the speed of the ship approaching the bridge pier 2 is a positive value, and the speed of the ship far away from the bridge pier 2 is a negative value;
a high-pressure water tank 10 is arranged on a river bed at the pier 2, the high-pressure water tank 10 is connected with a high-pressure variable-frequency water pump 11 used for injecting high-pressure water into the high-pressure water tank 10, the high-pressure variable-frequency water pump 11 is connected with a water inlet pipe 12, and a filter screen is arranged at the water inlet of the water inlet pipe 12; the screen is conventional and not shown.
Each high-pressure spray head 8 is connected with a high-pressure water tank 10 through a high-pressure water supply hose 24, and a pressure sensor 13 is arranged in the high-pressure water tank 10; the top of the pier 2 is provided with a waterproof box 14, an electric control device 9 is arranged in the waterproof box 14, and the laser range finder 6, the laser velocimeter 7, the high-pressure variable-frequency water pump 11 and the pressure sensor 13 are all connected with the electric control device 9; the electric control device 9 can be a single chip microcomputer or a PLC or an integrated circuit.
Each high-pressure spray head 8 is connected with a high-pressure spray hose 15 for reducing energy dissipation of water jet, and the length of the high-pressure spray hose 15 is 3-10 meters (including two end values). The high-pressure injection hose 15 is suspended downward below the water surface at the pier 2.
Within the length range of the high-pressure injection hose 15, on one hand, the water jet can be restrained from spreading in the radial direction, so that the resistance encountered in the injection path is reduced due to the reduction of the sectional area of the water jet, and on the other hand, the water flow can be isolated from the environmental fluid (air or water), so that the water jet is prevented from being blocked due to the disturbance between the environmental fluid and the water jet, and the resistance in the water injection process is greatly reduced.
The upstream surface and the downstream surface of the pier 2 are both provided with a guide rail 16 and a floating lifting mechanism which floats up and down along the guide rail 16; the direction pointing to the pier 2 is inward, and the direction departing from the pier 2 is outward;
the guide rail 16 is integrally arranged with the pier 2, the guide rail 16 protrudes out of the surface of the pier 2, and the horizontal section of the outer end part of the guide rail 16 is T-shaped;
the floating lifting mechanism comprises a floating base plate 17, a cavity for increasing buoyancy is arranged at the middle lower part of the floating base plate 17 (the cavity is a structure for increasing buoyancy conventionally, not shown in the figure), a solid part is arranged at the upper part of the floating base plate 17, and the detection water spraying mechanism is arranged on the solid part of the floating base plate 17; the inner surface of the floating base plate 17 is vertically provided with a T-shaped groove matched with the guide rail 16 in a sliding manner.
The floating lifting mechanism is provided with a waterline 18 when floating in water, the detection water spraying mechanism is arranged on a floating base plate 17 above the waterline 18, and the height of each high-pressure spray head 8 higher than the waterline 18 is 20 +/-5 cm.
Through the sliding insertion fit of the T-shaped groove and the T-shaped guide rail 16, the floating lifting mechanism can be ensured to float only in the vertical direction. The floating substrate 17 has a structure that, on one hand, the cavity increases the overall buoyancy, and on the other hand, the structural strength of the solid part is used to support the reaction force when jetting the water jet, thereby satisfying the requirements of increasing the buoyancy and ensuring the structural strength.
Detect water spray mechanism and set up on the unsteady base plate 17 of waterline 18 top, can guarantee that each high pressure nozzle 8 all just in time is higher than the surface of water (navigation water level) under normal conditions to make the water jet both be higher than the surface of water, press close to the surface of water again, spout to the ship in the position of pressing close to the surface of water, both utilized the air for the low resistance characteristic of water, guaranteed again that the injection position is located the middle part position of ship upper and lower direction, can not cause the harm to personnel and article on the ship deck.
Two sets of detection water spraying mechanisms are symmetrically arranged on each floating base plate 17 from left to right, the direction perpendicular to the surface of the pier 2 is taken as the vertical direction, the spraying direction of the high-pressure spray heads 8 in the detection water spraying mechanisms on the left side of the floating base plate 17 deviates from the vertical direction towards the left by 1-4 degrees (such as 2 degrees), and the spraying direction of the high-pressure spray heads 8 in the detection water spraying mechanisms on the right side of the floating base plate 17 deviates from the vertical direction towards the right by 1-4 degrees (such as 2 degrees);
a bilateral symmetry line on the horizontal section of the pier 2 is called a center line 19, the measuring range of the laser distance meter 6 and the laser velocimeter 7 in the water spray detection mechanism on the left side of the floating substrate 17 is an outer pier area enclosed by the center line 19 of the pier from the left side to the left side of the pier 2, and the measuring range of the laser distance meter 6 and the laser velocimeter 7 in the water spray detection mechanism on the right side of the floating substrate 17 is an outer pier area enclosed by the center line 19 from the right side to the right side of the pier; the farthest end (i.e., the outermost end) of the measurement range is 100 meters from the pier 2.
The high-pressure nozzles 8 are arranged in such a manner that the spraying direction deviates from the vertical direction, so that the ship can exert force for stopping approaching to the pier 2 along the direction vertical to the surface of the pier 2 and can exert force parallel to the surface of the pier 2, the course of the ship gradually deviates from the pier 2, and even if the ship finally contacts with the pier 2, the ship is in contact with the ship in the inclined direction. The destructive force of the oblique collision to the pier 2 is much smaller than the destructive force of the vertical collision to the pier 2, thereby further protecting the pier 2.
The upstream surface and the downstream surface of the pier 2 are respectively and fixedly connected with an anti-collision block 20 (such as 50 cm in thickness) made of FRP materials, metal plates 21 are respectively embedded in the positions, close to the upstream surface and the downstream surface of the pier 2, in the pier 2, a plurality of bolts 22 are welded on the metal plates 21, and the bolts 22 extend into the anti-collision block 20 and are fixedly connected with the anti-collision block 20;
two rows of anti-collision blocks 20 are symmetrically arranged on the upstream surface and the downstream surface of the pier 2 from left to right, and each row comprises a plurality of anti-collision blocks 20 which are uniformly arranged along the vertical direction at intervals; the guide rail 16 is positioned between two rows of crash blocks 20; the floating base plate 17 is slidably fitted with the crash block 20. Two rows of anti-collision blocks 20 are also respectively arranged on the left side surface and the right side surface of the pier 2 and are used for preventing ships from laterally colliding against the pier 2.
The FRP material has good elasticity, is not easy to damage after being contacted with water for a long time, and can absorb more impact energy when being impacted and damaged. The provision of the crash block 20 can further protect the pier 2 by absorbing the impact energy of the ship by utilizing the excellent characteristics of the FRP material when an accident occurs to the pier 2 only.
The surface of one side of the floating substrate 17 facing the pier 2 is provided with a walking wheel 23, and the walking wheel 23 is in rolling fit with the surface of the pier 2; the two walking wheels 23 are arranged in bilateral symmetry.
The traveling wheels 23 are provided so that the floating base plate 17 can transmit the reaction force (through the traveling wheels 23, the guide rails 16, and the impact prevention blocks 20) to the pier 2 more stably and uniformly when receiving the reaction force of the water jet.
The detection water spraying mechanisms at a plurality of bridge piers 2 of the bridge share one high-pressure water tank 10, and the high-pressure spray nozzles 8 at the bridge piers 2 are connected with the high-pressure water tank 10.
The invention also discloses an active anti-collision method using the anti-collision pier 2 structure, which comprises the following steps:
the preparation work is as follows: after the anti-collision pier structure is installed at the pier 2, acquiring corresponding information of pressure and jet distance, and storing the corresponding information in a memory built in the electric control device 9;
the first step is to raise the pressure;
when the ship enters a measuring range at the left side or the right side of the bridge pier 2 and approaches to the bridge pier 2, the laser range finder 6 in the water spray detecting mechanism at the left side or the right side of the floating base plate 17 detects distance information, and meanwhile, the laser speed measurer 7 detects speed information; the electric control device 9 receives the distance information and the speed information;
when the speed information is negative, the ship is far away from the pier 2, and at the moment, the electric control device 9 controls the high-pressure variable-frequency water pump 11 to keep a stop state and controls each high-pressure spray nozzle 8 to keep a closed state;
when the speed information is positive, indicating that the ship is approaching the pier 2, the laser range finder 6 detects that the distance information is d meters, and the electric control device 9 performs an operation of acquiring a target pressure P1: taking the jet distance with the smallest numerical value in the jet distances which are more than or equal to d +25 meters and stored in the memory as a target jet distance; the electric control device 9 takes the pressure value corresponding to the target injection distance as the target pressure P1 according to the corresponding information of the pressure and the injection distance;
the electric control device 9 opens the high-pressure variable-frequency water pump 11, injects water into the high-pressure water tank 10 and raises the pressure in the high-pressure water tank 10 until the pressure in the high-pressure water tank 10 is kept at P1 +/-0.1 MPa;
the second step is water jet collision avoidance;
opening a high-pressure spray head 8 of a water spray detection mechanism for detecting that the ship approaches, spraying water jet flow to the ship approaching the bridge pier 2, slowing the speed of the ship and promoting the ship to deviate from the bridge pier 2; in the process of spraying water by the high-pressure spray head 8; the electric control device 9 continuously obtains the speed of the ship approaching the bridge pier 2 through the laser velocimeter 7;
when the speed of the ship is greater than zero, the electric control device 9 acquires the distance between the ship and the pier 2 every 0.5 second through the laser distance meter 6, and performs the operation of acquiring the target pressure P1 according to the distance to acquire an updated target pressure P1 value, and correspondingly maintains the pressure in the high-pressure water tank 10 at P1 +/-0.1 MPa through the high-pressure variable-frequency water pump 11; when the pressure P1 is less than or equal to 1MPa, the electric control device 9 keeps the pressure in the high-pressure water tank 10 at 1 +/-0.1 MPa through the high-pressure variable-frequency water pump 11;
and continuously performing the second step until the ship speed is less than or equal to zero or the ship distance information is not detected (the ship passes through the bridge pier 2 or leaves the measuring range of the laser range finder 6 and the laser speed finder 7 and can not impact the bridge pier 2 any more), and controlling the high-pressure spray head 8 and the high-pressure variable-frequency water pump 11 to stop working by the electric control device 9 to finish the active anti-collision operation.
The preparation work is specifically as follows:
a worker starts the high-pressure variable-frequency water pump 11 through the electric control device 9, fills water into the high-pressure water tank 10 and raises the pressure in the high-pressure water tank 10; the water spraying detection mechanism is kept higher than the water surface of the pier 2,
when the pressure in the high-pressure water tank 10 rises by 0.1MPa from the water pressure of 1MPa, the pressure is maintained, the high-pressure nozzles 8 are opened one by one, the average jet distance X m of each high-pressure nozzle 8 under the pressure is measured and recorded, the high-pressure nozzles 8 are closed one by one, then the pressure in the water tank is continuously increased by 0.1MPa, and the corresponding relation between the pressure and the average jet distance is repeatedly measured and recorded until the value of X is more than or equal to 125 m.
The electromagnetic valves 25 are respectively installed at the high-pressure spray heads 8, and when the high-pressure spray heads 8 are opened, the corresponding electromagnetic valves 25 are slowly opened, so that the pressure inside the high-pressure spray hose 15 is gradually increased and the high-pressure spray hose gradually extends along the spray direction.
When the high-pressure nozzle 8 is opened, the corresponding solenoid valve 25 is slowly opened, so that the speed of extending the high-pressure injection hose 15 can be reduced, and the high-pressure injection hose 15 can be protected.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (3)
1. The active anti-collision method is carried out by using an anti-collision pier structure, wherein a pier cap for supporting an upper structure of a bridge is arranged at the top of a pier of the anti-collision pier structure, the bottom end of the pier is supported on a bearing platform, and the bearing platform is supported on a foundation downwards through a pile foundation;
the upstream surface and the downstream surface of the pier are respectively provided with a detection water spraying mechanism, and the detection water spraying mechanism comprises a laser range finder, a laser velocimeter and a plurality of high-pressure nozzles; the spraying direction of each high-pressure sprayer deviates from the pier; the diameter of the spray hole of each high-pressure spray head is 10 +/-3 cm;
the laser range finder is used for measuring the distance between the ship and the bridge pier; the laser velocimeter is used for measuring the speed of the ship relative to the bridge pier; the speed of the ship approaching the bridge piers is a positive value, and the speed of the ship far away from the bridge piers is a negative value;
a high-pressure water tank is arranged on a riverbed at the pier, the high-pressure water tank is connected with a high-pressure variable-frequency water pump for injecting high-pressure water into the high-pressure water tank, the high-pressure variable-frequency water pump is connected with a water inlet pipe, and a filter screen is arranged at the water inlet of the water inlet pipe;
each high-pressure spray head is connected with a high-pressure water tank through a high-pressure water supply hose, and a pressure sensor is arranged in the high-pressure water tank; a waterproof box is arranged at the top of the bridge pier, an electric control device is arranged in the waterproof box, and the laser range finder, the laser speedometer, the high-voltage variable-frequency water pump and the pressure sensor are all connected with the electric control device;
each high-pressure nozzle is connected with a high-pressure injection hose for reducing the energy dissipation of the water jet, and the length of the high-pressure injection hose is 3-10 m;
the upstream surface and the downstream surface of the pier are both provided with a guide rail and a floating lifting mechanism which floats up and down along the guide rail; taking the direction pointing to the bridge pier as inward direction and the direction departing from the bridge pier as outward direction;
the guide rail and the bridge pier are integrally arranged, the guide rail protrudes out of the surface of the bridge pier, and the horizontal section of the outer end part of the guide rail is T-shaped;
the floating lifting mechanism comprises a floating base plate, the middle lower part of the floating base plate is provided with a cavity for increasing buoyancy, the upper part of the floating base plate is provided with a solid part, and the detection water spraying mechanism is arranged on the solid part of the floating base plate; the inner surface of the floating base plate is vertically provided with a T-shaped groove matched with the guide rail in a sliding manner;
the floating lifting mechanism is provided with a waterline when floating in water, the detection water spraying mechanism is arranged on the floating base plate above the waterline, and each high-pressure spray head is 20 +/-5 cm higher than the waterline;
two sets of detection water spraying mechanisms are symmetrically arranged on each floating substrate from left to right, the direction perpendicular to the surface of the pier is taken as the vertical direction, the spraying direction of a high-pressure spray head in the detection water spraying mechanism on the left side of the floating substrate deviates from the vertical direction towards the left by 1-4 degrees, and the spraying direction of a high-pressure spray head in the detection water spraying mechanism on the right side of the floating substrate deviates from the vertical direction towards the right by 1-4 degrees;
the left-right symmetrical line on the horizontal section of the bridge pier is called a center line, the measuring range of the laser range finder and the laser speed meter in the detection water spray mechanism on the left side of the floating substrate is an outer region of the bridge pier enclosed between the center line of the bridge pier and the left side of the bridge pier, and the measuring range of the laser range finder and the laser speed meter in the detection water spray mechanism on the right side of the floating substrate is an outer region of the bridge pier enclosed between the center line of the laser range finder and the laser speed meter and the right side of the bridge pier; the distance between the farthest end of the measuring range and the bridge pier is 100 meters;
a walking wheel is arranged on the surface of one side of the floating substrate facing the pier, and the walking wheel is in rolling fit with the surface of the pier; two traveling wheels are symmetrically arranged at the left and the right;
the detection water spraying mechanisms at a plurality of bridge piers of the bridge share one high-pressure water tank, and the high-pressure spray heads at the bridge piers are connected with the high-pressure water tank;
the method is characterized by comprising the following steps:
the preparation work is as follows: after the anti-collision pier structure is installed at a pier, acquiring corresponding information of pressure and jet distance, and storing the corresponding information in a memory built in an electric control device;
the first step is to raise the pressure;
when a ship enters a measuring range at the left side or the right side of a bridge pier and approaches the bridge pier, a laser range finder in a water spray detecting mechanism at the left side or the right side of the floating substrate detects distance information, and meanwhile, a laser speed meter detects speed information; the electric control device receives the distance information and the speed information;
when the speed information is negative, the ship is far away from the bridge pier, and the electric control device controls the high-pressure variable-frequency water pump to keep a stop state and controls each high-pressure spray head to keep a closed state at the same time;
when the speed information is positive, the ship is close to the bridge pier, the laser range finder detects that the distance information is d meters, and the electric control device performs the operation of obtaining the target pressure P1: taking the jet distance with the smallest numerical value in the jet distances which are more than or equal to d +25 meters and stored in the memory as a target jet distance; the electric control device takes a pressure value corresponding to the target jet distance as a target pressure P1 according to the corresponding information of the pressure and the jet distance;
the electric control device opens the high-pressure variable-frequency water pump, injects water into the high-pressure water tank and raises the pressure in the high-pressure water tank until the pressure in the high-pressure water tank is kept at P1 +/-0.1 MPa;
the second step is water jet collision avoidance;
opening a high-pressure nozzle of a water spray detection mechanism for detecting that the ship approaches, spraying water jet to the ship approaching the bridge pier, slowing the speed of the ship and promoting the ship to deviate from the bridge pier; in the process of spraying water by the high-pressure spray head; the electric control device continuously obtains the speed of the ship approaching the bridge pier through the laser velocimeter;
when the speed of the ship is greater than zero, the electric control device obtains the distance between the ship and the bridge pier once every 0.5 second through the laser distance meter, and obtains a target pressure P1 according to the distance, obtains an updated target pressure P1 value, and correspondingly keeps the pressure in the high-pressure water tank at P1 +/-0.1 MPa through the high-pressure variable-frequency water pump; when the pressure P1 is less than or equal to 1MPa, the electric control device keeps the pressure in the high-pressure water tank at 1 +/-0.1 MPa through the high-pressure variable-frequency water pump;
and continuously carrying out the second step until the ship speed is less than or equal to zero or the ship distance information cannot be detected, and controlling the high-pressure spray head and the high-pressure variable-frequency water pump to stop working by the electric control device to finish the active anti-collision operation.
2. The active collision avoidance method of claim 1, wherein: the preparation work is specifically as follows:
a worker starts the high-pressure variable-frequency water pump through the electric control device, fills water into the high-pressure water tank and raises the pressure in the high-pressure water tank; keeping the water spraying detection mechanism higher than the water surface of the pier,
when the pressure in the high-pressure water tank rises by 0.1MPa from the water pressure of 1MPa, maintaining the pressure, opening the high-pressure nozzles one by one, measuring and recording the average jet distance X meters of the high-pressure nozzles under the pressure, closing the high-pressure nozzles one by one, then continuing to raise the pressure in the water tank by 0.1MPa, and repeatedly measuring and recording the corresponding relation between the pressure and the average jet distance until the value of X is more than or equal to 125.
3. The active collision avoidance method of claim 2, wherein:
and electromagnetic valves are respectively arranged at the high-pressure nozzles, and when the high-pressure nozzles are opened, the corresponding electromagnetic valves are slowly opened, so that the inside of the high-pressure injection hose is gradually boosted and gradually extended along the injection direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905017.7A CN112012096B (en) | 2020-09-01 | 2020-09-01 | Anti-collision pier structure and active anti-collision method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905017.7A CN112012096B (en) | 2020-09-01 | 2020-09-01 | Anti-collision pier structure and active anti-collision method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112012096A CN112012096A (en) | 2020-12-01 |
| CN112012096B true CN112012096B (en) | 2021-09-14 |
Family
ID=73516623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010905017.7A Active CN112012096B (en) | 2020-09-01 | 2020-09-01 | Anti-collision pier structure and active anti-collision method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112012096B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699937A (en) * | 2021-09-14 | 2021-11-26 | 河南明辉建设集团有限公司 | Collision-preventing device for bridge protection |
| CN114973771B (en) * | 2022-04-15 | 2024-02-09 | 重庆交通大学 | Active ship collision prevention method for bridge |
| CN115897494B (en) * | 2022-11-03 | 2023-09-29 | 广东海洋大学 | Bridge buffer stop based on laser rangefinder |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3372353B2 (en) * | 1994-07-08 | 2003-02-04 | 三菱重工業株式会社 | Collision protection equipment |
| CN100567645C (en) * | 2007-11-28 | 2009-12-09 | 赵颖寅 | The active bump-elimination structure of bridge |
| TW201344012A (en) * | 2012-04-17 | 2013-11-01 | jin-song Lai | Bridge pier local scour mitigation apparatus |
| CN206039873U (en) * | 2016-09-27 | 2017-03-22 | 成都信息工程大学 | Bridge anticollision monitoring system |
| CN107918716B (en) * | 2017-12-15 | 2020-12-29 | 浙江海洋大学 | Method for determining anti-collision field of rectangular bridge pier in straight channel |
| CN207891827U (en) * | 2018-02-09 | 2018-09-21 | 沈阳建筑大学 | A kind of self-floating multistage energy consumption anticollision device of pier |
| CN207904755U (en) * | 2018-02-22 | 2018-09-25 | 刘�东 | A kind of bridge pier with impact attenuation device |
| CN210341816U (en) * | 2019-07-10 | 2020-04-17 | 西南交通大学 | Power generation device for protecting bridge pier |
-
2020
- 2020-09-01 CN CN202010905017.7A patent/CN112012096B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112012096A (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112012096B (en) | Anti-collision pier structure and active anti-collision method | |
| CN210857117U (en) | Novel ship collision is prevented to group's stake formula bridge device | |
| CN103981840B (en) | The anti-ship of a kind of four limbs thin-wall piers hits facility and construction method thereof | |
| CN203403351U (en) | Water collision protector | |
| CN101748707A (en) | Water-borne lifting type anticollision device | |
| CN111455832A (en) | Three-layer flow guide plate anti-scouring pier | |
| CN217378537U (en) | Pier collision avoidance system | |
| CN201901863U (en) | Waterborne guardrail | |
| CN212358208U (en) | High pile cap wharf revetment structure | |
| CN108104066B (en) | Anti-collision device suitable for wharf | |
| CN210127393U (en) | Bridge buffer stop | |
| CN103850178A (en) | Overwater boat collision protecting device | |
| CN102900019A (en) | Bridge anti-collision device | |
| CN201785731U (en) | Water lifting type anti-collision device | |
| CN114606889B (en) | Pier collision avoidance system | |
| CN205636658U (en) | Crashproof structure of inland river intake | |
| CN212714776U (en) | High-pile wharf beneficial to stable docking of ship | |
| CN211171837U (en) | Inland river bridge pier type anti-collision facility | |
| CN218813526U (en) | Bridge buffer stop based on flexible composite structure | |
| CN214497147U (en) | Sea area bridge buffer stop | |
| CN219547697U (en) | Bridge buffer stop suitable for little water head | |
| CN216783788U (en) | Floating traffic platform device of getting on or off people on sea | |
| Conway | Protective works: An overview | |
| CN114934481A (en) | Ship collision prevention method for integrating three piers in wading | |
| CN219280617U (en) | Bridge anti-ship collision device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 450000 Zhengzhou Transportation planning Survey, Design and Research Institute Co.,Ltd. Patentee after: Zhengzhou Transportation planning Survey, Design and Research Institute Co.,Ltd. Address before: No.91, Longhai Middle Road, Erqi District, Zhengzhou City, Henan Province, 450000 Patentee before: ZHENGZHOU COMMUNICATIONS PLANNING SURVEY & DESIGN INSTITUTE |