CN112695620A - Pier anti-collision device with grading and multi-defense-line protection functions - Google Patents
Pier anti-collision device with grading and multi-defense-line protection functions Download PDFInfo
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- CN112695620A CN112695620A CN202011569715.0A CN202011569715A CN112695620A CN 112695620 A CN112695620 A CN 112695620A CN 202011569715 A CN202011569715 A CN 202011569715A CN 112695620 A CN112695620 A CN 112695620A
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- 239000004567 concrete Substances 0.000 claims abstract description 59
- 229920001971 elastomer Polymers 0.000 claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000011381 foam concrete Substances 0.000 claims abstract description 38
- 229920001821 foam rubber Polymers 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 10
- 230000003139 buffering effect Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims abstract 3
- 238000010074 rubber mixing Methods 0.000 claims description 11
- 238000006467 substitution reaction Methods 0.000 claims description 5
- 229920002396 Polyurea Polymers 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000002633 protecting effect Effects 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 40
- 230000006378 damage Effects 0.000 description 11
- 239000012792 core layer Substances 0.000 description 10
- 238000005452 bending Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
- E01F15/145—Means for vehicle stopping using impact energy absorbers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a pier anti-collision device with classification and multi-defense line protection, and belongs to the technical field of bridge collision protection. The device specifically comprises an inner-layer anti-collision steel plate, a rubber foam concrete filled buffering energy-absorbing sandwich layer, an outer-layer prefabricated rubber recycled concrete plate, a connecting piece and a high-strength bolt. The device has synthesized traditional rigidity buffer stop and flexible sandwich buffer stop's advantage, and it is poor to have solved traditional rigidity buffer stop energy-absorbing and protecting effect to and the technical problem that flexible sandwich structure sandwich layer utilization ratio is low. The device advantage can realize grading to the striking, realizes multichannel defence line protection. In addition, the device uses solid waste materials such as waste rubber and recycled concrete in a large number, adopts the prefabricated assembly type construction installation method, is a pier anti-collision device which has the advantages of protection, economy, environmental protection and the like, and has good use prospect and economic benefit.
Description
Technical Field
The invention belongs to the technical field of bridge collision protection, and particularly relates to a pier collision prevention device which is composed of an inner-layer collision prevention steel plate, a rubber foam concrete filled buffering and energy absorbing sandwich layer, an outer-layer prefabricated rubber recycled concrete plate, connecting pieces and high-strength bolts and has grading and multi-defense-line protection functions.
Background
With the continuous promotion of the urbanization construction in China, on one hand, the total amount of the removed construction waste is exponentially increased, which causes great harm to the environment in China. In order to solve the problem, the recycling of the construction waste becomes a research hotspot of scholars at home and abroad in recent years, for example, waste concrete blocks are crushed into coarse aggregates to prepare recycled concrete and other recycling modes, and huge economic and social benefits are brought to China. On the other hand, with the improvement of living standard, the number of people-average cars is increasing day by day, and urban traffic congestion is serious, and in order to solve this problem, the number and height of overpasses on urban roads are increasing constantly, and the vehicle bumps into the pier happens occasionally, and this will cause very big injury to pier and personnel on the vehicle, and the increase of cars also can lead to the junked tire to increase simultaneously, handles the problem that junked tire discarded object has become unable to avoid.
For collision avoidance of piers, two types of protection devices are mainly used at present, one type is traditional rigid protection, but the rigid protection has poor energy absorption and protection effects and can cause great harm to colliders; the other kind is the flexible protector of sandwich, the flexible protection of sandwich though can protect the pier and reduce vehicle damage protection car personnel safety on the car, but its sandwich layer utilization ratio and economic benefits are not high, the reason lies in no matter the size of impact, all can cause the damage to the sandwich layer, have to change the sandwich layer, and the outer steel sheet is easy to take place local deformation when the striking and is leaded to only a small part sandwich layer to play the energy-absorbing effect, sandwich layer utilization ratio is low.
Disclosure of Invention
The invention aims to provide a pier anti-collision device which is protective, economical and environment-friendly, integrates the advantages of a traditional rigid anti-collision device and a flexible sandwich anti-collision device, realizes classification of accidental collision, and adopts multiple defense lines for protection, so as to solve the technical problems that the traditional rigid anti-collision device does not consider the vehicle protection effect and the utilization rate of a sandwich layer of a flexible sandwich structure is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a pier buffer stop that possesses hierarchical and protection of multichannel defence line, is one kind and is equipped with hierarchical and protection of multichannel defence line's pier buffer stop who comprises inlayer anticollision steel sheet, rubber foam concrete filling buffering energy-absorbing sandwich layer, outer precast rubber recycled concrete board, connecting piece and high strength bolt.
In the above scheme, each part of the whole anti-collision device is simply assembled and completed by adopting factory prefabricated components and a construction site. When prefabricating in a factory, firstly, connecting the foot part of the special-shaped three-dimensional lattice framework and the inner-layer anti-collision steel plate by welding; then, supporting a template to pour and fill the rubber foam concrete into the special-shaped three-dimensional lattice framework; after the rubber foam concrete is maintained for a preset age, bonding the rubber foam concrete and the prefabricated rubber recycled concrete plate into a whole by using epoxy resin; the prefabricated anti-collision device is simply assembled on a construction site, and is connected into a whole through the inner layer connecting angle steel and the outer layer connecting angle steel and the high-strength bolt and fixed on the outer surface of the pier; and finally, filling gap filling materials between the inner layer connecting angle steel and the outer surface of the pier, wherein the device can be replaced immediately after being impacted by a vehicle.
In the scheme, the rubber foam concrete filled buffering energy-absorbing sandwich layer is composed of a special-shaped three-dimensional lattice framework and a rubber foam concrete filling material, wherein the special-shaped core body is the framework of the sandwich layer and is composed of a plurality of cells which are distributed in an array and are formed by four arc-shaped steel members. In actual engineering, the combination of rubber foam concrete with different densities and different rubber mixing amounts and special-shaped three-dimensional lattice frameworks with different heights and different radians can be adjusted to adapt to different working conditions so as to exert the optimal performance of the sandwich layer.
In the scheme, when the impact energy is small, the outer-layer prefabricated rubber recycled concrete plate is a main energy-absorbing component, the impact load is resisted mainly through the bending rigidity of the rubber recycled concrete plate, the sandwich layer cannot be damaged, and therefore the sandwich layer does not need to be replaced and belongs to rigid protection; when the impact energy is larger, the outer-layer prefabricated rubber recycled concrete plate and the rubber foam concrete material are filled in the special-shaped three-dimensional lattice framework to cooperatively resist the impact load and absorb the impact energy, and the protection is rigid and flexible.
In the scheme, the prefabricated rubber recycled concrete slab is mainly formed by mixing the waste rubber and crushed stone of the waste concrete test block, so that the construction waste is recycled, and the prefabricated rubber recycled concrete slab has high economic and social values. In actual engineering, the rubber recycled concrete is between the brittleness of common concrete and the toughness of a steel plate, and the bending rigidity and the toughness of the rubber recycled concrete can be changed by adjusting the thickness, the shape, the rubber mixing amount and the recycled aggregate substitution rate of the rubber recycled concrete so as to deal with different working conditions.
Among the above-mentioned scheme, to large-scale striking, the device can have better guard effect. When load acts on the outer rubber recycled concrete plate, on one hand, the rubber recycled concrete has excellent shock resistance, energy consumption and vibration reduction performance, and can weaken the contact rigidity during collision, so that the impact force peak value is reduced, and meanwhile, the high damping characteristic of the rubber recycled concrete material can absorb and dissipate the collision energy input into the sandwich layer; on the other hand, the deformation of the rubber recycled concrete is between the brittle deformation of a common concrete slab and the plastic deformation of a steel plate, the bending rigidity of the rubber recycled concrete slab is large, the local deformation is small, and the transmitted load is uniform, so that most sandwich layers are compressed, the cellular element rod pieces generate plastic bending deformation energy absorption, the cell walls of the rubber foam concrete material generate fracture energy absorption, the impact load peak value is reduced in a synergistic manner, when the load action is prolonged, finally, the impact force is transmitted to the bridge pier from the inner layer anti-collision plate, and the impact load peak value and the impact energy are greatly reduced. It is worth emphasizing that rubber foam concrete undergoes plastic damage rather than brittle damage when impacted.
In the scheme, the outer surface and the inner layer of the prefabricated rubber recycled concrete plate are both sprayed with polyurea elastic materials, so that the durability, the energy absorption capacity and the corrosion resistance of the whole anti-collision device can be improved; on the other hand, the damage to the collided object can be further reduced.
Compared with the prior art, the invention has the technical effects that:
(1) compared with the traditional rigid protection and flexible sandwich protection structures, the pier anti-collision device can realize grading and multi-defense line protection, and has the advantages of protection, economy, environmental protection and the like. When small collision occurs, the invention mainly plays the role of rigid anti-collision of the rubber recycled concrete plate, on one hand, the bending rigidity of the rubber recycled concrete plate is relatively large; on the other hand, the rubber recycled concrete plate can weaken the contact rigidity during collision and reduce the impact force peak value. Therefore, the rubber recycled concrete plate can resist small impact, cannot damage the core layer, and is superior to the traditional flexible protection (the core layer of the flexible sandwich protection structure needs to be replaced no matter the impact force is large or small); when the collision happens, the flexible anti-collision function of the core layer is mainly exerted, but compared with the condition that a steel plate can generate serious local deformation to only compress the local core layer, the rubber recycled concrete plate has uniform load transfer, so that the effect of most of the core layer can be exerted, and meanwhile, the high damping characteristic of the rubber recycled concrete material can absorb and dissipate collision energy input into the core layer, so that the rubber recycled concrete plate is superior to the traditional rigid protection and flexible protection, and the utilization rate of the core layer is improved; when a large impact occurs, most of the impact energy is dissipated through the destruction of the rubber recycled concrete panel and the sandwich layer, and then the innermost polyurea-carrying crashproof steel plate further weakens the impact force to the pier. Through the three-layer protection, the device utilizes rubber concrete slab's rigidity and the flexibility of sandwich layer comprehensively to the energy-absorbing effect of most sandwich layers is played, thereby makes the impact that transmits the pier reduce by a wide margin, can realize more effective protection to the pier, and when meetting rare striking, the structural reliability is superior to traditional rigidity protection and flexible protection.
(2) Compared with the traditional rigid protection and flexible sandwich protection structure, the outer layer of the invention adopts the prefabricated rubber recycled concrete plate, on one hand, the rigidity of the rubber recycled concrete plate is between that of the common concrete plate and the steel plate, the advantages of the common concrete plate and the steel plate can be combined, and the defects of the common concrete plate and the steel plate are reduced. Specifically, compared with a common concrete slab, the rubber recycled concrete slab has strong impact resistance and good toughness, and can weaken the contact rigidity during collision, thereby reducing the peak value of the impact force, dissipating the input energy and reducing the damage to the collided object; compared with a steel plate, the steel plate has high integral bending rigidity and uniform load transmission, thereby playing the role of most of the core layers and improving the utilization rate of the core layers. On the other hand, the prefabricated rubber recycled concrete slab is made of waste rubber and construction waste recycled aggregates, and has extremely high environmental protection value and economic value.
(3) Aiming at different use conditions, the bending rigidity and toughness of the rubber recycled concrete can be changed by adjusting the thickness, the shape, the rubber mixing amount and the recycled aggregate substitution rate of the rubber recycled concrete, and the optimal performance of the sandwich layer can be exerted by adjusting the density of the rubber foam concrete and the combination of the special-shaped three-dimensional lattice frameworks with different heights so as to adapt to different application scenes and different grades of impact force.
Drawings
FIG. 1 is a schematic diagram of a heterogeneous three-dimensional lattice structure cell according to the present invention.
FIG. 2 is a schematic diagram of a prefabricated special-shaped three-dimensional lattice framework structure.
FIG. 3 is a schematic view of a non-filled irregular three-dimensional lattice sacrificial structure according to the present invention.
FIG. 4 is a schematic view of a special-shaped three-dimensional lattice sacrificial structure filled with rubber foam concrete.
FIG. 5 is a schematic cross-sectional view of the rubber foam concrete filled special-shaped three-dimensional lattice anti-collision device in the invention.
Fig. 6 is a schematic view of the overall structure of the present invention.
In all the drawings, the same component numbers indicate the same components or materials, wherein 1 is a reinforced concrete pier, 2 is a gap filling material, 3 is a high-strength bolt, 4 is an angle steel connecting piece, 5 is a rubber foam concrete filled special-shaped three-dimensional lattice framework structure, 6 is a rubber recycled concrete slab, 41 is inner layer connecting angle steel, 42 is outer layer connecting angle steel, 51 is an inner layer impact panel, 52 is a rubber foam concrete filled special-shaped three-dimensional lattice framework core layer structure, 521 is a special-shaped three-dimensional lattice structure, and 522 is a rubber foam concrete filling material.
Detailed Description
In order to make the technical solutions in the present description better understood by those skilled in the art, the technical solutions in the embodiments of the present description will be clearly and completely described below with reference to the specific embodiments and the accompanying drawings.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Among the above-mentioned scheme, the pier buffer stop who possesses hierarchical and protection of multichannel defence line can design according to following step, preparation and installation:
step 1: selecting the thickness, the rubber mixing amount and the regeneration aggregate substitution rate of the proper rubber regeneration concrete slab according to the section size and the application condition of the pier; rubber foam concrete density and rubber mixing amount; the thickness of the inner layer anti-collision steel plate and the height and radian of the special-shaped three-dimensional lattice framework determine the size of the angle steel connecting piece, the model of the high-strength bolt and the position and size of the reserved hole.
Step 2: and performing factory prefabrication in advance according to the selected material mixing amount and the structural parameters, prefabricating the rubber recycled concrete plate with the bolt hole, and performing standard maintenance for a preset age.
And step 3: according to the preset density and the rubber mixing amount of the rubber foam concrete and the height and the radian of the special-shaped three-dimensional lattice framework, the special-shaped three-dimensional lattice framework is prefabricated, the special-shaped three-dimensional lattice framework and the inner-layer anti-collision steel plate are connected into a whole by welding, the rubber foam concrete is poured and filled into the special-shaped three-dimensional lattice framework by a template, and after the rubber foam concrete is cured for a preset age, the rubber foam concrete and the prefabricated rubber recycled concrete plate are bonded into a whole by using epoxy resin, so that the prefabricated anti-collision device can be obtained.
And 4, step 4: and before the anti-collision device is installed, roughening treatment is carried out on the outer surface of the pier. Then fixing the prefabricated anti-collision device on the outer surface of the pier through the inner layer connecting angle steel and the outer layer connecting angle steel and the high-strength bolt; and finally, filling gap filling materials between the inner layer connecting angle steel and the outer surface of the pier.
And 5: and spraying a layer of polyurea material on the outer surface of the rubber recycled concrete plate.
The present invention has been described in connection with the above embodiments, which are intended to be illustrative and not restrictive, and any modifications, equivalents, improvements and the like that come within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The utility model provides a possess pier buffer stop of hierarchical and protection of multichannel defence line which characterized in that: the anti-collision bridge comprises an inner-layer anti-collision steel plate, a middle rubber foam concrete filled buffering energy-absorbing sandwich layer and an outer-layer prefabricated rubber regenerative concrete plate, wherein the inner-layer anti-collision steel plate, the middle rubber foam concrete filled buffering energy-absorbing sandwich layer and the outer-layer prefabricated rubber regenerative concrete plate are sequentially wrapped on the outer surface of a bridge pier.
2. The pier collision avoidance device with hierarchical and multi-defense line protection according to claim 1, characterized in that: the rubber foam concrete filled buffering energy-absorbing sandwich layer consists of a special-shaped three-dimensional lattice framework and a rubber foam concrete filling material; the special-shaped three-dimensional lattice framework is composed of a plurality of cell elements distributed in an array mode, and each cell element is composed of four arc-shaped steel members.
3. The pier collision avoidance device with classification and multi-defense line protection functions and the installation method of the pier collision avoidance device according to claim 1, wherein the pier collision avoidance device is characterized in that: all parts of the whole anti-collision device are prefabricated in a factory and are simply assembled on a construction site. When prefabricating in a factory, firstly, connecting the foot part of the special-shaped three-dimensional lattice framework and the inner-layer anti-collision steel plate by welding; then, supporting a template to pour and fill the rubber foam concrete into the special-shaped three-dimensional lattice framework; after the rubber foam concrete is maintained for a preset age, bonding the rubber foam concrete and the prefabricated rubber recycled concrete plate into a whole by using epoxy resin; the prefabricated anti-collision device is simply assembled on a construction site, and is connected into a whole through the inner layer connecting angle steel and the outer layer connecting angle steel and the high-strength bolt and fixed on the outer surface of the pier; and finally, filling gap filling materials between the inner layer connecting angle steel and the outer surface of the pier.
4. The pier collision avoidance device with hierarchical and multi-defense line protection according to claim 1, characterized in that: for different application conditions, the thickness of the plate, the shape of the plate, the rubber mixing amount and the recycled aggregate substitution rate of the precast rubber recycled concrete plate at the outer layer adopt different design values.
5. The pier collision avoidance device with hierarchical and multi-defense line protection according to claim 1, characterized in that: for different application conditions, the density and the rubber mixing amount of the rubber foam concrete in the rubber foam concrete filling buffering energy-absorbing sandwich layer and the height and the radian of the special-shaped three-dimensional lattice framework can be combined by adopting different design values.
6. The pier collision avoidance device with hierarchical and multi-defense line protection according to claim 1, characterized in that: when the impact energy is small, the energy is absorbed by the outer-layer precast rubber recycled concrete plate, the sandwich layer does not need to be replaced, and the rigid protection is achieved; when the impact energy is large, the outer-layer prefabricated rubber recycled concrete plate and the rubber foam concrete material are filled into the special-shaped three-dimensional lattice framework to resist the impact load in a cooperative mode, the impact energy is absorbed, the anti-collision device can be directly replaced after the impact is finished, and the anti-collision device belongs to 'rigid-flexible parallel protection'.
7. The pier collision avoidance device with hierarchical and multi-defense line protection according to claim 1, characterized in that: polyurea elastic materials are sprayed on the outer surface of the prefabricated rubber recycled concrete plate and the inner layer steel plate.
8. The pier collision avoidance method with classification and multi-defense line protection by using the device of claim 1 is characterized in that: step 1: selecting the thickness, the rubber mixing amount and the regeneration aggregate substitution rate of the proper rubber regeneration concrete slab according to the section size and the application condition of the pier; rubber foam concrete density and rubber mixing amount; determining the size of an angle steel connecting piece, the model of a high-strength bolt and the position and size of a reserved hole according to the thickness of the inner layer anti-collision steel plate and the height and radian of the special-shaped three-dimensional lattice framework;
step 2: performing factory prefabrication in advance according to the selected material mixing amount and the structural parameters, prefabricating the rubber recycled concrete plate with the bolt hole, and performing standard maintenance in a preset age;
and step 3: according to the preset density and the rubber mixing amount of the rubber foam concrete and the height and the radian of the special-shaped three-dimensional lattice framework, the special-shaped three-dimensional lattice framework is prefabricated, the special-shaped three-dimensional lattice framework and the inner-layer anti-collision steel plate are connected into a whole by welding, then the rubber foam concrete is poured and filled into the special-shaped three-dimensional lattice framework by a template, and after the rubber foam concrete is cured for a preset age, the rubber foam concrete and the prefabricated rubber recycled concrete plate are bonded into a whole by using epoxy resin, so that the prefabricated anti-collision device can be obtained;
and 4, step 4: and before the anti-collision device is installed, roughening treatment is carried out on the outer surface of the pier. Then fixing the prefabricated anti-collision device on the outer surface of the pier through the inner layer connecting angle steel and the outer layer connecting angle steel and the high-strength bolt; finally, filling gap filling materials between the inner layer connecting angle steel and the outer surface of the pier;
and 5: and spraying a layer of polyurea material on the outer surface of the rubber recycled concrete plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011569715.0A CN112695620A (en) | 2020-12-26 | 2020-12-26 | Pier anti-collision device with grading and multi-defense-line protection functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011569715.0A CN112695620A (en) | 2020-12-26 | 2020-12-26 | Pier anti-collision device with grading and multi-defense-line protection functions |
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2020
- 2020-12-26 CN CN202011569715.0A patent/CN112695620A/en active Pending
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Application publication date: 20210423 |
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