阅读说明：本技术 一种自恢复桥墩防护装置 (Self-recovery pier protection device ) 是由 周宏元 吴洁好 王小娟 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种自恢复柔性桥墩防护装置,属于建筑结构防护领域。该装置包括玄武岩柔性纤维层、自恢复柔性纤维颗粒散体吸能层、外部玄武岩纤维型材迎撞层。桥墩外侧玄武岩柔性纤维层包裹,自恢复柔性纤维颗粒散体吸能层连接在其外侧,最外部用玄武岩纤维型材封装。本发明实现了柔性桥墩防撞,既保证了桥墩在受到冲击荷载作用时的防护,又保证了撞击车辆的安全；并且实现了在冲击荷载作用后的防护装置的自然恢复,重复使用,大大降低了加固修复的时间和经济成本。同时吸能层内的颗粒散体来源于建筑固废,实现绿色建筑、可持续发展的理念。(The invention discloses a self-recovery flexible pier protection device, and belongs to the field of building structure protection. The device comprises a basalt flexible fiber layer, a self-recovery flexible fiber particle energy absorption layer and an external basalt fiber profile collision layer. The outer side of the pier is wrapped by a basalt flexible fiber layer, the self-recovery flexible fiber particle energy absorption layer is connected to the outer side of the pier, and the outermost part of the pier is packaged by a basalt fiber section. The invention realizes the anti-collision of the flexible bridge pier, not only ensures the protection of the bridge pier when the bridge pier is under the action of impact load, but also ensures the safety of the collision vehicle; and the natural recovery and the repeated use of the protective device under the action of the impact load are realized, and the time for reinforcing and repairing is greatly reduced, and the economic cost is greatly reduced. Meanwhile, the granular dispersion in the energy absorption layer is derived from building solid waste, and the concepts of green building and sustainable development are realized.)

1. The utility model provides a flexible pier protector resumes which characterized in that: the self-recovery energy absorption layer comprises a basalt flexible fiber layer, a self-recovery flexible fiber particle dispersion energy absorption layer and a basalt fiber profile material impact layer. The basalt flexible fiber layer is wrapped on the outer side of the pier, the self-recovery flexible fiber particle dispersion energy absorption layer is wrapped on the outer side of the basalt flexible fiber layer, and the basalt fiber section bar collision-facing layer is wrapped on the outer side of the self-recovery flexible fiber particle dispersion energy absorption layer.

2. The self-restoring flexible pier protecting device according to claim 1, wherein: the fiber cloth used by the basalt flexible fiber layer comprises basalt fiber, carbon fiber, aramid fiber and PBO fiber high-performance artificial synthetic fiber.

3. The self-restoring flexible pier protecting device according to claim 1, wherein: the fiber section used for the basalt fiber section material collision layer comprises basalt fiber, carbon fiber, aramid fiber and PBO fiber high-performance artificial synthetic fiber.

4. The self-restoring flexible pier protecting device according to claim 1, wherein: the self-recovery flexible fiber particle dispersion energy absorption layer comprises a fiber wrapping material, a self-recovery unit and a solid waste particle dispersion material.

5. The self-restoring flexible pier protecting device according to claim 4, wherein: the single crystal structure forms of the self-recovery flexible fiber particle dispersion energy absorption layer comprise a regular hexahedron, a prism and a cylinder.

6. The self-restoring flexible pier protecting device according to claim 4, wherein: self-recovery flexible fiber particle dispersion energy absorption layer, its characterized in that: the self-recovery unit middle spring form comprises a single spring or a plurality of springs.

7. The self-restoring flexible pier protecting device according to claim 4, wherein: the self-recovery flexible fiber particle dispersoid energy absorption layer, and the solid waste particle dispersoid materials comprise natural sandstone, recycled concrete particles and waste brick slag particles.

8. The self-restoring flexible pier protecting device according to claim 4, wherein: the method comprises the steps of manufacturing a cubic unit cell lattice by using flexible fiber woven cloth, placing a self-recovery unit in the cubic unit cell lattice, filling solid waste particle bulk materials in the cubic unit cell lattice, applying certain pre-pressure to the self-recovery unit, and finally packaging the reserved surface in a sewing mode.

9. The self-restoring flexible pier protecting device according to claim 8, wherein: the cubic single-cell lattice is restrained by the flexible fiber woven fabric and prestressed by an internal self-recovery device, so that the cubic single-cell lattice is maintained in a self-stable state. The self-recovery unit adopts two circular steel plates, the outer contour of the circular steel plate is internally tangent with the cubic unit cell lattice plane, and a compressible spring is arranged at the position with symmetrical circle center between the two circular steel plates. According to the design of pier protection, the number and the positions of the unit cell lattices are arranged and sewn on the basalt flexible fiber layer, so that the self-recovery flexible particle dispersion energy absorption layer and the basalt fiber layer of the unit cell lattices are formed.

10. The self-restoring flexible pier protecting device according to claim 1, wherein: the basalt fiber section bar is prefabricated into pieces in a factory by adopting a piece assembling mode on a collision layer, and the outer part of the self-recovery flexible fiber particle dispersion energy absorption layer in the middle is assembled on site.

Technical Field

The invention relates to the field of building structure protection, in particular to a pier anti-collision device.

Background

In recent years, with the rapid development of socioeconomic performance in China, automobiles are widely popularized, and more automobiles run on roads. The rise of traffic accidents has come with the serious disasters caused by the impact of vehicles on the highway bridge. In order to protect the life and property safety of people, the protection of the pier structure under the vehicle impact (impact load) is necessary. The traditional pier structure anti-collision design often improves the anti-collision performance by increasing the structural rigidity. However, for existing structures, an effective and easily implemented method for improving the impact (shock load) resistance is desired. The invention realizes the required purpose, the outer side of the existing bridge pier is wrapped with the basalt fiber layer, the outer side of the existing bridge pier is connected with the flexible fiber particle energy absorbing layer, and the outer part of the existing bridge pier is packaged by adopting a basalt fiber section bar to serve as an outer collision facing layer. Realize the flexible protection of pier promptly, reduce pier structure and receive the destruction that the car striking brought, protect personnel's in the striking vehicle life safety. The self-recovery of the protective device is realized, the protective device naturally recovers after the pier structure is impacted, the pier structure can be repeatedly used for protecting the pier or has a better protective effect on the pier under continuous impact, and the economic cost of repairing and replacing is reduced.

Disclosure of Invention

The invention provides a self-recovery flexible pier protection device aiming at the impact protection of the existing pier structure. A self-recovery flexible bridge pier protection device wraps the outside of a bridge pier, when a vehicle is impacted (impact load), an impact layer of an outermost basalt fiber section serves as a loaded interface, and the impact load is uniformly transmitted to a self-recovery flexible fiber particle energy absorption layer. The self-recovery flexible fiber particle dispersion energy absorption layer is deformed under the load action. Namely, the load acting time is increased through deformation, and the load peak value is reduced. In the deformation process of the energy absorption layer, a part of energy is converted into internal energy to be consumed in a heat mode, and the rest energy is continuously transmitted to the pier structure. The basalt flexible fiber layer is wrapped outside the pier structure, and the overall rigidity of the pier structure and the integrity after damage are improved by providing hoop restraint. The self-recovery flexible pier protection device fully exerts the characteristic of flexible protection through the combination of self-recovery units and particle dispersions of the energy absorption layer, and greatly reduces the load peak value. When some high-speed impact is encountered, the energy dissipation function of the energy absorption layer is better exerted through the combination effect of the two. After one-time impact is finished, the self-recovery unit of the energy absorption layer restores the protection device to the state before impact, and the next impact is protected. The self-recovery flexible pier protection device realizes bidirectional protection of a pier structure and a vehicle and has a good protection effect under the action of continuous impact (multiple impacts).

In order to achieve the purpose, the basic scheme of the invention is as follows:

a self-recovery flexible bridge pier protection device comprises a basalt flexible fiber layer wrapped outside a bridge pier, a middle self-recovery flexible fiber particle energy absorption layer, an external basalt fiber profile collision layer and related connecting parts in the protection device.

Among the above-mentioned scheme, a flexible pier protector resumes, for convenient construction and environmental protection, adopts the prefabricated mode of mill to make on-the-spot assembly installation. And the basalt fiber layer wrapped outside the pier, the middle self-recovery flexible fiber particle energy absorption layer and the external basalt fiber profile collision facing layer are all prefabricated in a factory.

Firstly, manufacturing a cubic unit cell lattice by using flexible fiber woven cloth, temporarily sealing the reserved surface, placing a self-recovery unit in the cubic unit cell lattice, then filling the cubic unit cell lattice with solid waste particle dispersoids, then applying certain pre-pressure to the self-recovery unit, and finally packaging the reserved surface by adopting a sewing mode. The cubic single-cell lattice is restrained by the flexible fiber woven fabric and prestressed by an internal self-recovery device, so that the cubic single-cell lattice is maintained in a self-stable state. The self-recovery unit adopts two circular steel plates, the outer contour of each circular steel plate is internally tangent to the lattice plane of the cubic unit cell, and the compressible springs are arranged at the positions of the two circular steel plates with symmetrical circle centers. According to the design of pier protection, the number and the positions of the unit cell lattices are arranged and sewn on the basalt flexible fiber layer, so that the self-recovery flexible particle dispersion energy absorption layer and the basalt fiber layer of the unit cell lattices are formed. The basalt fiber section bar is prefabricated into pieces in a factory by adopting a piece assembling mode on a collision layer, and the outer part of the self-recovery flexible fiber particle dispersion energy absorption layer in the middle is assembled on site.

A self-recovery flexible pier protection device can be in the form of adjusting devices with different section forms according to different sizes of pier structures. And adjusting the thickness and the weaving mode of the basalt flexible fiber layer, the thickness, the lattice form and the number of the self-recovery flexible fiber particle energy absorption layer, and the thickness and the material type of the impact layer of the basalt fiber profile according to the requirement of the anti-impact protection level. And adjusting the combination form of the self-recovery units and the particle dispersions in the self-recovery flexible fiber particle dispersion energy absorption layer according to the impact load rate.

In the scheme, basalt fibers are suggested to be adopted in the flexible fiber wrapping layer. The anti-impact device is wound on the outer side of the pier structure, provides circumferential restraint for the pier structure, and improves the overall anti-impact capacity of the structure. When the pier structure is damaged under the action of large impact load, the structure still has good participation bearing capacity due to the constraint of the flexible fiber wrapping layer.

In the scheme, the self-recovery flexible fiber particle dispersion energy absorption layer is used as a main energy consumption part and is connected to the outer side of the flexible fiber wrapping layer. When the self-recovery flexible fiber particle energy absorption layer is impacted, the self-recovery flexible fiber particle energy absorption layer deforms and moves, and on one hand, the impact load action time is prolonged, and the low load action peak value is obtained. On the other hand, part of energy is consumed by changing mechanical energy into internal energy through the movement of the particle dispersion. Therefore, the damage caused by vehicle impact is reduced, and the pier structure is protected. After the striking, can effectively reduce or even eliminate the residual deformation after the structure striking through recovering the unit certainly, make it to resume normal service function fast, effectively protect pier structure to deal with next vehicle striking, time and economic cost that greatly reduced protective structure maintained the rebuild.

In the scheme, the basalt fiber sectional materials are assembled on the construction site through prefabricated sub-pieces facing the collision layer. And connecting the self-recovery flexible fiber particle dispersion energy absorption layer to the outside, and packaging. As a collision layer of the self-recovery flexible bridge pier protection device, after vehicle collision is received, impact load is uniformly applied to the internal self-recovery flexible fiber particle energy absorption layer. And the self-recovery unit of the energy absorption layer can be effectively protected from shear deformation.

In the scheme, the weaving mode and the number of wrapping layers of the basalt flexible fiber layer, the rigidity of the self-recovery units in the self-recovery flexible fiber particle energy absorption layer, the particle size range and the compactness of the solid waste particle dispersion body and the thickness of the collision-resisting layer of the basalt fiber section bar can be adjusted according to the structure form and the collision-resisting capacity of the bridge pier.

The invention has the following advantages:

(1) the device is mainly used for collision avoidance of a pier structure, and a flexible energy absorption layer is formed by combining self-recovery units and particle discrete particles through installation of an existing pier structure. The concept of flexible protection is introduced into a protective structure, and under the action of impact load, the action time of the sacrificial load and the pier structure is replaced by a lower load action peak value. And bidirectional protection is realized for the pier structure and the impacting vehicle.

(2) The self-recovery unit in the self-recovery flexible fiber particle energy absorption layer realizes self-recovery of the pier protection device after vehicle collision, so that deformation caused by vehicle collision is effectively eliminated, and the pier protection device can quickly recover normal use functions. Under the condition of facing to the polar end such as interlink impact, the protection to the pier structure is more effectively provided. And greatly reduces the cost of spot check and maintenance.

(3) The flexible fiber layer is made of basalt fibers, and has the advantages of high temperature resistance, corrosion resistance, greenness, no pollution and low price. The granular dispersion adopts solid waste (waste concrete granules and waste brick slag), gives full play to the solid waste utilization, and realizes the idea of green and environment-friendly building, thereby realizing the sustainable development of building structures.

Drawings

Fig. 1 is a schematic view of a self-restoring flexible pier protector.

Fig. 2 is a schematic diagram of a self-healing flexible fiber particle dispersion energy absorbing layer.

Fig. 3 is a top view of a self-restoring flexible pier guard.

In all the drawings, the same component numbers indicate the same components or materials, wherein 1 is a basalt flexible fiber layer, 2 is a self-recovery flexible fiber particle dispersion energy absorption layer, 3 is a basalt fiber profile collision layer, 21 is a lower fixing steel sheet, 22 is a middle spring, 23 is a particle dispersion filling material, 24 is a fiber wrapping material, 31 is a segment model 1, 32 is a segment model 2, 33 is a segment model 3, and 34 is a segment model 4.

Detailed Description

The invention is described in further detail with reference to the accompanying drawings and the detailed description:

as shown in fig. 1, a self-restoring flexible pier protecting device.

Taking the structure of the urban overpass pier as an example, the diameter of the pier is 1500mm, according to the statistics of road traffic, most vehicles running on the road section are cars and freight-free passenger cars, and therefore, the arrangement height of the pier protection device is 1.5 meters, and the form is shown in figure 1. A self-recovery flexible bridge pier protection device comprises a basalt flexible fiber layer 1, a self-recovery flexible fiber particle energy absorption layer 2 and a basalt fiber profile material collision facing layer 3. Wherein the self-healing flexible fiber particle dispersion energy absorbing layer comprises self-healing units, a particle dispersion filler material 23 and a fiber wrapping material 24. The self-restoring unit is composed of upper and lower fixed steel sheets 21 and a middle spring 22.

The method comprises the following specific implementation steps:

the basalt flexible fiber layer 1, the self-recovery flexible fiber particle energy absorption layer 2 and the basalt fiber profile material impact layer 3 are all assembled in the form of factory prefabricated parts on site.

Factory pre-support component:

the basalt flexible fiber layer 1 is made of bidirectional woven basalt fiber cloth, has the weight of 200g/m ^2 and the width of 750 mm.

The self-recovery flexible fiber particle dispersion energy absorption layer 2 is characterized in that the upper and lower fixed steel sheets of the self-recovery unit are made of Q233 steel, the diameter of each steel sheet is 100mm, and the thickness of each steel sheet is 5 mm. The rigidity of the spring in the middle is k, the length of the spring is 110mm, and the spring is arranged between the upper steel sheet and the lower steel sheet in a circle center symmetry mode. The fiber wrapping material is made into a regular hexahedron structure by adopting bidirectional woven basalt fiber cloth, the size of the hexahedron structure is 100 x 100mm, and the upper part of the hexahedron structure is not sealed temporarily. The self-healing unit was placed in it and the hexahedral structure was filled with solid waste granular dispersion material. The solid waste particle dispersion has a filling compactness of 0.7 and a particle size ranging from 0.3mm to 4.75 mm. And applying a certain pre-pressure to the self-recovery unit to compress the self-recovery unit until the top surface of the upper steel sheet is flush with the upper opening of the fiber-wrapped hexahedral structure, and then packaging the fiber-wrapped hexahedral structure in a sewing manner to form a closed state and a self-stable structure. And sewing the prepared single-cell lattice structure on basalt fiber cloth, wherein the deformation direction of the self-recovery unit is vertical to the fiber cloth surface.

The basalt fiber section bar is made into a duct piece structure by adopting basalt fibers, and the duct piece structure is 100mm thick and 750mm wide. 4 types of pipe pieces are adopted, and the self-sealing ring shell is formed by splicing the pipe pieces in a structural form.

And (3) field assembly construction:

firstly, the surface of the pier structure is cleaned within 1.5 m from the ground, then the pier structure is evenly coated with epoxy resin adhesive, and the basalt fiber layer 1 is slowly and evenly wrapped on the outer side of the pier structure 4 and is wound for one circle. And then, uniformly coating the epoxy resin adhesive on the outer side of the basalt flexible fiber layer 1, wrapping a circle of basalt flexible fiber layer 1, and paying attention to the fact that the joint seam of two circles of basalt fiber layers needs to be subjected to staggered seam treatment, wherein the staggered seam distance is larger than 1 time of width (750 mm). The lapping width of the upper and lower basalt flexible fiber layers is more than 0.5 m. The basalt fiber layer is uniformly wrapped on the outer side of the pier structure, and is free of bulges and defects.

And then, winding the self-recovery flexible fiber particle dispersion energy absorption layer 2 outside the basalt fiber layer by using the same bonding method for one circle.

And finally, splicing the basalt fiber section bar head-on collision layer 3 outside the self-recovery flexible fiber particle dispersion energy absorption layer 2, wherein the splicing sequence of the pipe pieces is 31, 32 and 33, and finally 34 (the sequence of 32 and 33 can be interchanged) to form a closed annular shell. The self-recovery unit of the self-recovery flexible fiber particle dispersion energy absorption layer 2 is pre-pressed in the manufacturing process, and when the packaging of the wrapping fiber is finished, the self-recovery unit can provide outward expansion force by introducing the characteristic of the self-recovery unit, so that the basalt fiber section bar forms a self-stabilization system in a special structural form facing the collision layer 3. When the upper and lower basalt profiles are spliced against the collision layer, the staggered joint treatment is required. The basalt fiber section material collision layer 3 is composed of segment models with different sections, the segment model 1 is a straight edge, the segment model 2 is a straight edge and a bevel edge, the segment model 3 is a straight edge and a bevel edge, and the segment model 4 is two bevel edges.

The present invention is described above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and the above embodiments are only illustrative and not restrictive, and any modifications, equivalents, improvements and the like within the spirit and principle of the present invention should be included in the protection scope of the present invention.