Flexible sleeve reinforcing device and pier reinforcing construction method

Abstract

The invention belongs to the technical field of pier reinforcement, and particularly relates to a flexible sleeve reinforcement device and a pier reinforcement construction method. The device comprises a flexible steel plate, the flexible steel plate is curled to form a barrel-shaped structure, the barrel-shaped structure is arranged on the side wall of the damaged pier in a surrounding mode, the flexible steel plate comprises a first surface and a second surface, the first surface is the inner side face of the barrel-shaped structure, and the first surface is provided with a first reinforcing component and a second reinforcing component; and concrete is arranged between the cylindrical structure and the damaged pier. The reinforcing device adopts the flexible steel plate as a formwork for concrete pouring, the flexible steel plate is convenient to wind and transport, does not occupy space, can be quantitatively cut according to the specific perimeter of the pier, and is convenient to operate. The reinforcing component and the second reinforcing component are installed in the flexible steel plate, the strength of the sleeve is improved, after the sleeve is installed on the damaged pier, anti-disturbance concrete is poured between the pier and the sleeve, and finally the anti-disturbance concrete and the pier form an integrated structure to protect the damaged pier.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge pier reinforcement, and in particular relates to a flexible sleeve reinforcement device and a bridge pier reinforcement construction method. Background Art

[0002] At present, the environment where bridges are located covers a variety of topographic units and complex disaster-prone environments. Various natural disasters such as mountain torrents, mudslides, and earthquakes occur frequently along the line. As rescue channels, bridges are restricted by factors such as complex and diverse disaster damage, difficulty in transporting raw materials, and high time requirements for maintaining access. This often leads to serious consequences such as delayed repairs and obstructed rescue, which seriously affects the smooth flow of rescue channels and threatens the safety of people's lives and property. Under the influence of natural disasters, bridge piers are structures that are easily damaged by bridges. When bridge piers are damaged, it is very easy to cause the bridge to collapse and cause secondary disasters.

[0003] Common reinforcement schemes for damaged bridge piers include: increasing the cross-section, adding bridge piers, external steel plates, external carbon fiber cloth, glass fiber sleeve reinforcement, etc. Among them, increasing the cross-section reinforcement is to increase the concrete cross-sectional area by adding steel bars and pouring concrete on the basis of the original bridge piers to improve the stiffness, compression and bending bearing capacity of the bridge piers; adding bridge pier reinforcement is to build new bridge piers next to the original bridge piers. This type of scheme has a good reinforcement effect, but the disadvantages of this scheme include: long construction period (not suitable for the needs of emergency rapid construction), a large proportion of manual construction during the construction process (workers repair bridge piers after disasters, with high safety risks), etc. The scheme with a short construction period and low worker participation has the problem of insufficient reinforcement effect.

[0004] Reinforcement solutions such as external steel plates, external carbon fiber cloth, and glass fiber sleeves have limited reinforcement effects and are suitable for situations where bridge piers are slightly damaged. The damage to bridge piers after the disaster is very serious, and this type of adhesive reinforcement solution cannot meet the reinforcement needs. Summary of the invention

[0005] The purpose of the present invention is to provide a flexible sleeve reinforcement device and a construction method in view of the above-mentioned technical problems existing in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A flexible sleeve reinforcement device includes a flexible steel plate, which is curled to form a cylindrical structure. The cylindrical structure is used to surround the side wall of a damaged bridge pier. The flexible steel plate includes a first surface and a second surface. The first surface is the inner side surface of the cylindrical structure. The first surface is provided with a first reinforcement member and a second reinforcement member. Concrete is poured between the cylindrical structure and the damaged bridge pier.

[0008] In the technical solution of the present invention, a flexible sleeve reinforcement device for damaged bridge piers is proposed. The reinforcement device uses a flexible steel plate as the main body. The flexible steel plate is easy to roll and transport, does not take up space, can be quantitatively cut according to the specific circumference of the bridge pier, and is easy to operate. The main function of the flexible steel plate is to serve as a template for concrete pouring. The reinforcement component and the second reinforcement component are installed in the flexible steel plate to improve the strength of the sleeve. After the sleeve is installed on the damaged bridge pier, anti-disturbance concrete is poured between the bridge pier and the sleeve, and finally an integrated structure is formed with the bridge pier to protect the damaged bridge pier.

[0009] In the technical solution of the present invention, the flexible steel plate is a 1mm stainless steel thin plate. Before being curled into a cylindrical structure, it can be freely rolled up or spread out. The flexible steel plate is prefabricated in a factory. The length of the flexible steel plate does not need to consider the diameter of the specific pier. Before construction, the circumference of the pier is measured on site to obtain the required length, and the required area is cut using metal scissors.

[0010] As a preferred technical solution of the present invention, the first reinforcement component includes a plurality of vertical steel bars and a plurality of positioning steel plates, the plurality of vertical steel bars are arranged at intervals along the circumferential direction of the flexible steel plate, the positioning steel plate is fixedly arranged on the first surface, the positioning steel plate is provided with a limiting hole, the vertical steel bars pass through the limiting hole, and at least two positioning steel plates are sleeved on each of the vertical steel bars.

[0011] As a preferred technical solution of the present invention, the positioning steel plates are arranged at intervals along the height direction of the flexible steel plate, and 3-6 positioning steel plates are sleeved on each of the vertical steel bars.

[0012] As a preferred technical solution of the present invention, the interval between two adjacent vertical steel bars is 3-10 cm.

[0013] As a preferred technical solution of the present invention, the second reinforcement member includes a plurality of steel wire ropes, and the plurality of steel wire ropes are arranged at intervals along the height direction of the flexible steel plate.

[0014] Preferably, the second reinforcement member further includes at least one positioning bar, the positioning bar is vertically arranged, and a plurality of fixing holes are spaced apart along the length direction of the positioning bar, and the fixing holes are used to fix the steel wire rope to the positioning bar.

[0015] Preferably, the positioning bar includes a first positioning bar and a second positioning bar, the flexible steel plate includes a first end and a second end, the first positioning bar is arranged at the first end, the second positioning bar is arranged at the second end, one end of the shear-resistant steel wire rope is fixed to the first positioning bar, and the other end of the shear-resistant steel wire rope is fixed to the second positioning bar.

[0016] Preferably, the intersection of the steel wire rope and the vertical steel bar is fixed with a cable tie.

[0017] Preferably, the second reinforcement member includes a second connecting member, which is used to connect the two ends of the steel wire rope, and the second connecting member includes a sub-buckle and a female buckle, the sub-buckle is arranged on the first positioning strip, and the female buckle is arranged on the second positioning strip.

[0018] Preferably, a sealing strip is provided at the bottom of the first surface, and the sealing strip is used to prevent concrete from leaking out when pouring the anti-disturbance concrete. After the stiffening flexible sleeve is installed, the anti-disturbance concrete is poured between the damaged pier and the stiffening flexible sleeve.

[0019] Preferably, the first end portion and the second end portion are connected by a first connecting member, the first connecting member includes a first folded angle and a second folded angle, the first folded angle and the second folded angle are relatively clamped and fixed, the first folded angle is arranged at the first end portion, the second folded angle is arranged at the second end portion, the first folded angle is formed by bending the flexible steel plate from the first surface to the second surface, and the second folded angle is formed by bending the flexible steel plate from the second surface to the first surface.

[0020] As a preferred technical solution of the present invention, a traction and curling assembly is provided on the second surface. The traction and curling assembly includes at least one stopper, and a winding steel wire rope is inserted into at least one of the stoppers. The traction and curling assembly is used to wind and embrace the flexible steel plate to form a cylindrical structure. During the actual construction process, two ends of the winding steel wire rope are fixed respectively by two mechanical arms, and the two mechanical arms move toward each other around the damaged bridge pier in the circumferential direction, so that the flexible steel plate is wound on the damaged bridge pier.

[0021] A bridge pier reinforcement construction method, which is completed by using the above-mentioned flexible sleeve reinforcement device, comprises the following steps:

[0022] Step 1: Survey all damaged bridge piers of the target line, count the diameter and damage height of the damaged bridge piers, and cut the flexible steel plate according to the diameter and damage height data; and use a robotic arm to roughen the concrete surface; the flexible steel plate is a factory prefabricated part;

[0023] Specifically, the flexible steel plate is a 1mm thick stainless steel plate. Its main function is to position the template and steel bars. It is flexible and easy to transport after rolling up. When cutting a 1mm thick stainless steel plate, a bending length of 10 to 15cm should be reserved, and the thickness of the poured concrete is 10cm. The chiseling of the concrete surface is completed by the robotic arm.

[0024] Step 2, installing a reinforcing member, a second reinforcing member, a first connecting member, and a second connecting member on the flexible steel plate;

[0025] Step 3, hoisting the flexible steel plate to the corresponding damaged pier position, making the first surface close to the side wall of the damaged pier, curling the flexible steel plate by a mechanical traction device, making the flexible steel plate embrace the damaged pier to form a cylindrical structure, first connecting the male buckle and the female buckle of the second connector, and then clamping the first corner and the second corner of the first connector;

[0026] Step 4: pouring concrete into the cylindrical structure.

[0027] In step 2, specifically, a positioning steel plate and a positioning bar are welded on the first surface of the flexible steel plate, and the diameters of the positioning holes on the positioning steel plate and the fixing holes on the positioning bar should be slightly larger than the diameters of the vertical steel bars or steel wire ropes.

[0028] A first angle is made at the first end of the flexible steel plate, and a second angle is made at the second end of the flexible steel plate, wherein the bending angles of the first angle and the second angle should be less than 15°. Vertical steel bars and steel wire ropes are installed, and the intersection of the vertical steel bars and the steel wire ropes is fixed by wire tying; a sealing strip is installed on the first surface side of the flexible steel plate as the bottom.

[0029] The method also includes installing a traction curling assembly on the second surface of the flexible steel plate.

[0030] In step 3, a traction and curling assembly is further provided on the second surface of the flexible steel plate, and the traction and curling assembly includes at least one stopper, and a winding wire rope is inserted into at least one of the stoppers. The traction and curling assembly is used to wind and embrace the flexible steel plate to form a cylindrical structure.

[0031] In step 4, the poured concrete is self-leveling small stone anti-disturbance concrete. The poured concrete has the characteristics of anti-disturbance, fast hardening and early strength, micro expansion, and self-leveling. The concrete can be purchased as commercial concrete.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. The present invention uses flexible stainless steel plates as templates for pouring concrete and positioning devices for steel bars. They are mass-produced in a factory prefabricated manner, transported after winding, and can be cut as needed. The reinforcement device of the present invention has the characteristics of fast construction speed and no need for workers to work under the bridge while ensuring the reinforcement effect. According to calculations, the construction time of a bridge pier is about 1 to 2 hours, which meets the needs of emergency repair projects. At the same time, due to the reduction in construction period and personnel, the safety of the present invention is significantly improved in emergency repair projects compared with the prior art. At the same time, except for cast-in-place concrete, all other parts of this project are prefabricated in the factory, and the construction quality is significantly improved compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An expanded view (first surface perspective) of a flexible sleeve reinforcement device proposed for an exemplary embodiment of the present invention;

[0035] Figure 2 An expanded view of a flexible sleeve reinforcement device according to an exemplary embodiment of the present invention (second surface perspective);

[0036] Figure 3 A schematic cross-sectional structure diagram of a flexible sleeve reinforcement device proposed in an exemplary embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of a second connecting member of a flexible sleeve reinforcement device provided in an exemplary embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the longitudinal section structure of a flexible sleeve reinforcement device provided in an exemplary embodiment of the present invention installed on a damaged bridge pier;

[0039] Figure 6 for Figure 5 The cross-sectional view at II;

[0040] Figure 7 It is a schematic diagram of the overall external three-dimensional structure of a flexible sleeve reinforcement device proposed in an exemplary embodiment of the present invention installed on a damaged bridge pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 100-damaged pier, 200-damaged part of the pier, 1-flexible steel plate, 11-first surface, 12-second surface, 13-first end, 14-second end, 2-vertical reinforcement, 3-positioning steel plate, 4-shear resistant steel wire rope, 51-first positioning strip, 52-second positioning strip, 7-sub-buckle, 71-rod-shaped joint, 72-clamping protrusion, 8-female buckle, 81-annular pin, 82-one-way movable plate, 9-sealing strip, 10-first fold angle, 15-second fold angle, 16-limiting ring, 17-winding steel wire rope, 18-anti-disturbance concrete. DETAILED DESCRIPTION

[0043] In order to more clearly describe the invention purpose, technical scheme and technical effect advantages in the specific implementation case of the present invention, the scheme in the specific embodiment will be described in detail in combination with the drawings of the specification of the present invention. The specific technical scheme involved in the following specific embodiments is only for a clear and complete description of the innovative technical scheme of the present invention. It is only a part of the specific implementation scheme that can be adopted by the present invention, not all embodiments, and should not be understood as a limitation on the innovative scheme of the present invention. Any scheme adopting the same inventive concept of the present invention should be included in the protection scope of the present invention.

[0044] Secondly, the description of the drawings in the specific embodiments of the present invention is only for the convenience of technical personnel to understand the solution of the present invention. The partial details in the drawings are for the convenience of clearly presenting the technical solution. It should not be considered that all technical features in the drawings must be included in the specific implementation cases, and the detailed features in the drawings should not be identified as additional limitations on the innovative technical solution of the present invention. The components in the various embodiments described and shown in the drawings can be combined and arranged according to different configurations, and these changes in combination and arrangement should be identified as part of the entire embodiment of the innovative solution of the present invention and included in the scope of protection of the present invention.

[0045] In summary, the schemes or descriptions presented in the specific embodiments and drawings of the present invention are not intended to limit the scope of protection claimed, but are merely selected embodiments / cases to help technicians understand the relevant innovative solutions. Based on these embodiments, all other equivalent or parallel embodiments obtained by those skilled in the art without creative work are within the scope of protection claimed by the present invention.

[0046] It should be noted that, unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship, such as "up", "down", "left", "right", "center", "inside", "outside", etc., are all based on the expression of the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the invented product / device / apparatus is placed when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0047] In addition, the use of terms such as "horizontal", "vertical", "overhanging", etc. does not mean that the corresponding device / component / element is absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element is set in a specific direction such as "horizontal", "vertical", "overhanging", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0048] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0049] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be 3, 4, 5, 6, 7, 8, 9, etc., or even more than 9.

[0050] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading and other commonly used connection means in the field. This connection can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components.

[0051] For those skilled in the art, when understanding the solutions described in the specific embodiments of the present invention, they can refer to the conventional technical manuals in the field. At the same time, for the places where the above-mentioned terms appear, they can make appropriate understandings or adjustments for reference, and deduce the implementation of the same or similar technical solutions without paying any creative work.

[0052] The above embodiments describe only the basic principles, main features and / or advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the embodiments. The above embodiments and the invention content of the specification only describe the principles or specific cases of the present invention. Without departing from the essence of the innovative idea of ​​the present invention, the innovative scheme of the present invention may be subject to various changes and improvements, and these changes and improvements all fall within the scope of protection claimed by the present invention.

[0053] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] Example 1

[0056] This embodiment provides a construction method for reinforcing a damaged bridge pier 100. The construction method is completed by using the aforementioned flexible sleeve reinforcement device and is applied to a damaged bridge pier 100 reinforcement project of a post-disaster bridge on a highway. Figure 1-Figure 7 shown.

[0057] Step 1: Preliminarily survey all damaged bridge piers of the target line, count the diameter of the damaged bridge piers and the height of 200 of the damaged part of the bridge pier, and cut the flexible steel plate 1 according to the diameter and damage height data; and use a mechanical arm to roughen the concrete surface; the flexible steel plate 1 is a factory prefabricated part;

[0058] Specifically, the damaged bridge piers have diameters of 1.2m and 1.5m, with a total of 46 damaged piers. After being damaged, the piers can still support the weight of the bridge and the passage of small vehicles, but there are safety hazards. Reinforcement construction needs to be completed in a short time to ensure the smooth passage of the emergency rescue. After preliminary on-site surveys, the height of the external concrete package is only 5m.

[0059] According to the needs of the project, a 1mm thick flexible steel plate 1 prefabricated part with a length of 230m was produced in the factory, and the positioning steel plate 3 and the positioning strip were prefabricated. The width of the flexible steel plate 1 was 5m, which corresponds to the height of the flexible steel plate 1 placed vertically to embrace the bridge pier. The flexible steel plate 1 was moderately curled in the factory before being cut to facilitate vehicle transportation. After being transported to the first bridge by vehicle, the flexible sleeve reinforcement device was processed on-site at the bridge head.

[0060] The length of the flexible steel plate 1 to be cut is determined based on the diameter (1.2m) and number (8 piers are damaged) of the damaged piers of the first bridge. The length corresponds to the circumference of the piers. Considering that the thickness of the outer concrete is 10cm, a 10cm angle is reserved for the flexible sleeve reinforcement device. The length of the cut flexible steel plate 1 is 3.14×(1.2+0.2)+0.2m=4.6m. Then use a steel plate bending machine to bend the edge of the flexible steel plate 1. The edge of the flexible steel plate 1 is the edge in the direction of wrapping the pier. Bending the edge of the flexible steel plate 1 is to make the first connecting member. The first connecting member includes a first angle 10 and a second angle 15. The first angle 10 is made at the first end 13 of the flexible steel plate 1, and the second angle 15 is made at the second end 14 of the flexible steel plate 1. The bending angles of the first angle 10 and the second angle 15 should be less than 15°. The first connecting member is used to connect and fix the flexible steel plate 1 after it embraces the pier. Figure 1 shown.

[0061] Step 2, installing the first reinforcing member, the second reinforcing member, the first connecting member and the second connecting member on the flexible steel plate 1; the first reinforcing member includes a plurality of vertical steel bars 2 and a plurality of positioning steel plates 3, the plurality of vertical steel bars 2 are arranged at intervals along the circumferential direction of the flexible steel plate 1, the positioning steel plates 3 are fixedly arranged on the first surface 11, the positioning steel plates 3 are provided with limiting holes 31, the vertical steel bars 2 are arranged to pass through the limiting holes 31, and at least two positioning steel plates 3 are sleeved on each of the vertical steel bars 2.

[0062] Specifically, the positioning steel plate 3 and the positioning bar are welded on the first surface 11 of the flexible steel plate 1, and the diameters of the positioning holes on the positioning steel plate 3 and the fixing holes on the positioning bar should be slightly larger than the diameters of the vertical steel bars or steel wire ropes.

[0063] The positioning bar includes a first positioning bar 51 and a second positioning bar 52, the flexible steel plate 1 includes a first end 13 and a second end 14, the first positioning bar 51 is arranged at the first end 13, the second positioning bar 52 is arranged at the second end 14, one end of the shear-resistant steel wire rope 4 is fixed to the first positioning bar, and the other end of the shear-resistant steel wire rope 4 is fixed to the second positioning bar 52.

[0064] The vertical steel bars 2 and the shear-resistant steel wire ropes 4 are installed, and the intersection of the vertical steel bars 2 and the shear-resistant steel wire ropes 4 is fixed by wire binding; the sealing strip 9 is installed on the first surface 11 side of the flexible steel plate 1 as the bottom.

[0065] like Figure 3 As shown, the first surface 11 is the inner side of the flexible steel plate 1 initially curled during factory transportation, and the outer side is the second surface 12. The positioning steel plate 3 and the positioning strip are arranged in accordance with Figure 1 The arrangement diagram is welded on site to the first surface 11 of the flexible steel plate 1. Specifically, the positioning bar includes a first positioning bar 51 and a second positioning bar 52, the first positioning bar 51 is arranged at the first end 13 of the flexible steel plate 1, the second positioning bar 52 is arranged at the second end 14 of the flexible steel plate 1, and the steel wire rope is horizontally arranged between the two positioning bars.

[0066] Specifically, the length of the positioning strip is 5m, the hole spacing is 0.2m, the height is 8cm, and the thickness is 0.5mm; the lateral spacing of the positioning steel plate 3 is 20cm, the distance between the hole and the first surface 11 of the flexible steel plate 1 is 5cm, the height is 8cm, the thickness is 0.5mm, and the width is 3cm.

[0067] The wire rope limiting device 8 is used to fasten the corner of the 1 mm stainless steel plate 6 by pulling the curling wire rope 2.

[0068] After completing the welding of the positioning steel plate 3 and the positioning bar, the installation of the vertical steel bars 2 and the shear wire rope 4 can begin. Specifically, in this embodiment, the vertical steel bars 2 are preferably HRB400 steel bars with a diameter of 16 mm, and the shear wire rope 4 is a steel wire rope with a diameter of 12 mm. After the vertical steel bars 2 are installed, they should be slightly welded to the positioning steel plate 3. After the shear wire rope 4 is installed, it is tied together with the vertical steel bars 2 with iron wire. The second connecting piece is installed at both ends of the steel wire rope. The second connecting piece is used to connect the two ends of the steel wire rope. The second connecting piece includes a sub-buckle 7 and a female buckle 8. The sub-buckle 7 is set on the first positioning bar 51, and the female buckle 8 is set on the second positioning bar 52.

[0069] More specifically, in the second connecting member, the female buckle 8 is cylindrical as a whole, with a cavity inside, and multiple one-way movable valves are arranged at intervals along the axial direction inside, and the movable direction of the one-way movable valve is from the a end of the female buckle 8 to the b end of the female buckle 8. Specifically, the one-way movable valve includes an annular pin 81, and the end of the annular pin 81 close to the axis is provided with multiple one-way movable plates 82 along the circumference of the annular pin 81. The sub-buckle 7 includes a rod-shaped joint 71, and the rod-shaped joint 71 is provided with multiple clamping protrusions 72, and the clamping protrusions 72 are arranged at intervals along the axial direction of the rod-shaped joint 71. The sub-buckle 7 penetrates from the a end of the female buckle 8 to the b end of the female buckle 8, and the clamping protrusions 72 are clamped and connected with the one-way movable valve.

[0070] The second surface 12 of the flexible steel plate 1 is also provided with a traction and curling assembly, and the traction and curling assembly includes at least one stopper, and at least one of the stoppers is inserted into a winding wire rope 17. The traction and curling assembly is used to wind the flexible steel plate 1 to form a cylindrical structure. In the actual construction process, two ends of the winding wire rope 17 are fixed by two mechanical arms respectively, and the two mechanical arms move toward each other around the damaged bridge pier 100, so that the flexible steel plate 1 is wound on the damaged bridge pier 100. Specifically, as Figure 2 As shown, three groups of limiters are arranged at intervals from top to bottom on the second surface 12 of the single flexible steel plate 1, each group of limiters includes three limit rings 16, and the winding wire rope 17 passes through the three limit rings 16 horizontally in sequence.

[0071] Further preferably, the winding wire rope 17 passes through the limiting ring 16, and an additional length of 10 m is reserved to facilitate the operation of the robot arm.

[0072] Specifically, Figure 3 The figure shows a schematic structural diagram of a second connecting member, wherein the second connecting member is a one-way clamping structure.

[0073] In step 2, a sealing strip 9 is provided at the bottom of the first surface 11, and the sealing strip 9 is used to prevent concrete from leaking out when pouring the anti-disturbance concrete 18. The sealing strip 9 is glued to the bottom of the first surface 11 of the flexible steel plate 1 with a strong quick-drying glue. The sealing strip 9 is a rubber column with a circular cross-section and a diameter of 12 mm to ensure that the bottom of the flexible steel plate 1 is densely filled after closing.

[0074] Step 3: hoisting the flexible steel plate 1 to the corresponding damaged pier position, making the first surface 11 close to the side wall of the damaged pier, curling the flexible steel plate 1 by a mechanical traction device to make it embrace the damaged pier to form a cylindrical structure, and closing the first connector and the second connector;

[0075] Specifically, during the on-site construction process, a mechanical arm or an embracing roughening robot is used to roughen the parts that need to be outsourced to the specifications. The flexible reinforcement device is hoisted to the damaged position of the pier by clamping the curling wire rope through the mechanical arm. Then, the three curved wire ropes 2 are tightened at the same time to further curl and tighten the flexible sleeve reinforcement device. The first end 13 and the second end 14 are connected by a first connecting member. The first connecting member includes a first folded angle 10 and a second folded angle 15. The first folded angle 10 and the second folded angle 15 are relatively clamped and fixed. The first folded angle 10 is set at the first end 13, and the second folded angle 15 is set at the second end 14. The first folded angle 10 is formed by bending the flexible steel plate 1 from the first surface 11 to the second surface 12, and the second folded angle 15 is formed by bending the flexible steel plate 1 from the second surface 12 to the first surface 11.

[0076] Until the first end 13 and the second end 14 of the flexible steel plate 1 are close to each other. At this time, the sealing strip 9 has a 2mm pre-compression, which can effectively ensure the airtightness. At this time, the second connectors at both ends of the shear-resistant steel wire rope 4 are just buckled. And because the sealing strip 9 has the characteristics of flexibility and a certain amount of compression, it can be sealed tightly.

[0077] Step 4: pour concrete into the cylindrical structure. By mixing the anti-disturbance concrete 18 on the bridge deck, the anti-disturbance concrete 18 has the characteristics of anti-disturbance (vibration interference), fast hardening and early strength, micro expansion, and self-leveling. It is pumped into the flexible sleeve reinforcement device. One day after the pouring is completed, the reinforcement goal can be achieved, and the bearing capacity of the damaged bridge pier is restored to the original design state. After the construction is completed, Figure 7 The coiled steel wire rope 17 can be disassembled after the construction is completed and used in the construction of the next damaged bridge pier 100 .

[0078] When the construction of the first bridge pier is completed, the second bridge pier will be started until all the bridge piers of this bridge are completed. Then the construction will be transferred to the next bridge until all the bridge piers of this line are reinforced.

[0079] The construction period of this project is 3 days. The plan of 3 labor services working simultaneously is adopted. The actual construction time is 85 hours (excluding the time of work site transfer, factory prefabrication, etc.), and the average actual construction time is 1.9 hours. In addition, during the construction process, there is no need for personnel to reach the damaged part of the pier, which significantly reduces the construction risk.

[0080] Example 2

[0081] This embodiment is an application solution for bridge piers with larger spans.

[0082] Specifically, the diameter of the bridge pier is 2.5m, and a total of 6 bridge piers are damaged, and the reinforcement length is 12m. Considering the thickness of the outer concrete is 20cm, and the angle is 20cm. After calculation, the required cutting length of the flexible steel plate 1 is 3.14×(2.5+0.4)m+0.4m=9.5m. The length of the positioning steel plate 3 is 12m, the spacing between the openings is 0.2m, the height is 10cm, and the thickness is 0.5mm; the lateral spacing of the steel bar positioning steel plate 3 is 20cm, the distance between the opening and the first surface 11 of the flexible steel plate 1 is 10cm, the height is 18cm, the thickness is 0.5mm, and the width is 3cm. The relevant construction plan is consistent with Example 1. After the construction is completed, Figure 7 shown.

[0083] Example 3

[0084] This embodiment provides a flexible sleeve reinforcement device, and its specific structure refers to the construction method in Embodiment 1.

[0085] Comparative Example 1

[0086] This comparative example provides a method for strengthening bridge piers, in which the bridge piers are reinforced by external concrete. The diameter of the bridge pier is 1.5m, and there are two damaged parts in the whole bridge. A reinforcement scheme with an external concrete thickness of 10cm and an external height of 5m is adopted. The construction content and sequence are: manual roughening of the concrete surface of the bridge pier, drilling holes for planting steel bars in the concrete, planting steel bars, tying steel bars, setting up formwork, pouring concrete, and curing concrete. A total of 8 workers need to arrive at the damaged area for construction, and the actual time used for construction is 4 days (excluding concrete curing). The average construction time for a single pier is 2 days. And construction preparation (material transportation, material processing, etc.) requires 1 day.

[0087] Through comparative analysis, it can be clearly found that the construction method of the patent of the present invention does not require construction workers to carry out construction at the damaged bridge pier position, and the construction speed is significantly faster than the conventional construction period and the construction is more convenient.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible sleeve reinforcement device, characterized in that: The invention comprises a flexible steel plate (1), wherein the flexible steel plate (1) is curled to form a cylindrical structure, wherein the cylindrical structure is used to surround and be arranged on the side wall of a damaged bridge pier, wherein the flexible steel plate (1) comprises a first surface (11) and a second surface (12), wherein the first surface (11) is the inner side surface of the cylindrical structure, and the first surface (11) is provided with a first reinforcement member and a second reinforcement member, and the space between the cylindrical structure and the damaged bridge pier is used to pour concrete.

2. The flexible sleeve reinforcement device according to claim 1, characterized in that: The first reinforcing member comprises a plurality of vertical steel bars (2) and a plurality of positioning steel plates (3), wherein the plurality of vertical steel bars (2) are arranged at intervals along the circumferential direction of the flexible steel plate (1), the positioning steel plates (3) are fixedly arranged on the first surface (11), and a limiting hole (31) is arranged on the positioning steel plate (3), and the vertical steel bars (2) are arranged to pass through the limiting hole (31), and at least two positioning steel plates (3) are sleeved on each of the vertical steel bars (2).

3. The flexible sleeve reinforcement device according to claim 2, characterized in that: Each of the vertical steel bars (2) is sleeved with 3 to 6 positioning steel plates (3), and the positioning steel plates (3) are arranged at intervals along the height direction of the flexible steel plate (1).

4. The flexible sleeve reinforcement device according to claim 2, characterized in that: The interval between two adjacent vertical steel bars (2) is 3-10 cm.

5. The flexible sleeve reinforcement device according to claim 1, characterized in that: The second reinforcement member comprises a plurality of shear-resistant steel wire ropes (4), wherein the plurality of shear-resistant steel wire ropes (4) are arranged at intervals along the height direction of the flexible steel plate (1); It also comprises at least one positioning bar, which is arranged vertically and has a plurality of fixing holes arranged at intervals along the length direction of the positioning bar, wherein the fixing holes are used to fix the shear-resistant steel wire rope (4) to the positioning bar.

6. The flexible sleeve reinforcement device according to claim 5, characterized in that: The positioning strip comprises a first positioning strip (51) and a second positioning strip (52); the flexible steel plate (1) comprises a first end portion (13) and a second end portion (14); the first positioning strip (51) is arranged at the first end portion (13); the second positioning strip (52) is arranged at the second end portion (14); one end of the shear-resistant steel wire rope (4) is fixed to the first positioning strip; and the other end of the shear-resistant steel wire rope (4) is fixed to the second positioning strip.

7. The flexible sleeve reinforcement device according to claim 6, characterized in that: The second reinforcing member comprises a second connecting member, the second connecting member is used to connect the two ends of the shear-resistant steel wire rope (4), the second connecting member comprises a sub-buckle (7) and a female buckle (8), the sub-buckle (7) is arranged on the first positioning strip (51), the female buckle (8) is arranged on the second positioning strip (52), and the sub-buckle (7) is snap-connected with the female buckle (8).

8. The flexible sleeve reinforcement device according to claim 1, characterized in that: The first surface (11) is also provided with a sealing strip (9), and the sealing strip (9) is arranged at the bottom position of the cylindrical structure.

9. The flexible sleeve reinforcement device according to claim 1, characterized in that: The first end portion (13) and the second end portion (14) are connected by a first connecting member, the first connecting member comprises a first folded angle (10) and a second folded angle (15), the first folded angle (10) and the second folded angle (15) are mutually clamped and fixed, the first folded angle (10) is arranged at the first end portion (13), the second folded angle (15) is arranged at the second end portion (14), the first folded angle (10) is formed by bending the flexible steel plate (1) from the first surface (11) to the second surface (12), and the second folded angle (15) is formed by bending the flexible steel plate (1) from the second surface (12) to the first surface (11).

10. A bridge pier reinforcement construction method, characterized in that: The construction method is completed by using the flexible sleeve reinforcement device according to any one of claims 1 to 9, and comprises the following steps: Step 1: Survey all damaged bridge piers of the target line, count the diameter and damage height of the damaged bridge piers, and cut the flexible steel plate (1) according to the diameter and damage height data; the flexible steel plate (1) is a factory prefabricated part; Step 2, installing a first reinforcing member, a second reinforcing member, a first connecting member, and a second connecting member on the flexible steel plate (1); Step 3, hoisting the flexible steel plate (1) to the corresponding damaged pier position, making the first surface (11) close to the side wall of the damaged pier, curling the flexible steel plate (1) by a mechanical traction device, making the flexible steel plate (1) embrace the damaged pier to form a cylindrical structure, first connecting the male buckle (7) and the female buckle (8) of the second connecting member, and then clamping the first folded angle (10) and the second folded angle (15) of the first connecting member; Step 4: pouring concrete into the cylindrical structure.

Images