Structure and method for adding a new pier body after surrounding an old masonry foundation with a glass fiber sleeve

Abstract

This application relates to the technical field of pier reconstruction, and specifically discloses a structure and method for adding a new pier body after surrounding and glass fiber sleeves for an old masonry foundation. The structure includes an old pier masonry foundation, a newly added pier body, and a glass fiber sleeve. The old pier masonry foundation is arranged on the riverbed, and the outer wall of the old pier masonry foundation is fixedly connected with the newly added pier body, which is used to increase the cross-sectional area of the old pier masonry foundation. The glass fiber sleeve is fixedly connected with the newly added pier body and is used to reduce the water flow impact on the newly added pier body. This application solves the problem of adding a new structure on the old masonry foundation and has the effect of improving the problem that the existing pier reconstruction lacks surface protection measures.

Description

Technical Field

[0001] This application relates to the technical field of pier reconstruction, and particularly to a structure and method for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve. Background Art

[0002] In the field of bridge engineering, the technology of pier reconstruction and reinforcement has always been one of the key research points. With the continuous increase of transportation loads and the increase of service life, many old piers need to be reconstructed, such as increasing the cross-section, to enhance their bearing capacity and stability.

[0003] Especially when it is necessary to utilize the old masonry foundation to build a new reconstruction structure, the old masonry foundation can only be reconstructed by increasing the cross-section, and then the new reconstruction structure is embedded in the increased cross-section to be stabilized.

[0004] However, the traditional pier reconstruction method mainly directly constructs by increasing the cross-section on the basis of the original pier foundation. For example, the size of the pier is increased by means of concrete pouring, etc. During the construction process, it is necessary to carry out enclosure and drainage construction for the pier. The enclosure and drainage construction of the pier requires a large amount of materials, equipment and labor, such as the construction and demolition of cofferdams, the purchase and operation of drainage equipment, etc., increasing the construction cost of the project. Moreover, if problems occur during the construction process, such as water leakage, blockage, etc., rework and repair are required, further increasing the cost. The thickness after reinforcement by the conventional method of increasing the cross-section is large, which has a great impact on the appearance, will seriously affect the river and drainage and flood discharge capacity, and even affect the waterway navigation transportation.

[0005] Moreover, the conventional reinforcement method is a method that treats the symptoms but not the root cause. Over time, due to the scouring of water flow and the action of dry-wet changes, the same type of diseases will still appear in the newly added superstructure of the bridge, resulting in the need for secondary, tertiary or even more maintenance and reinforcement treatments, consuming relatively high costs. Summary of the Invention

[0006] In order to solve the problem that the old masonry piers cannot be directly anchored with steel bars due to their own brittleness, optimize the method of building and reconstructing structures on the old masonry foundation, and improve the situation that the existing piers lack surface protection measures after reconstruction, this application provides a structure and method for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve.

[0007] In the first aspect, a structure for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve provided by this application adopts the following technical scheme:

[0008] A structure for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve includes:

[0009] The old pier masonry foundation located at the riverbed has a new pier body fixedly connected to the outer wall of the old pier masonry foundation, and the new pier body is used to increase the cross-sectional area of the old pier masonry foundation;

[0010] A fiberglass sleeve, fixedly connected to the new pier body, is used to reduce the water flow impact on the new pier body.

[0011] By adopting the above technical solutions, the new pier body can increase the cross-sectional area of the old pier masonry foundation to provide a steel bar anchorage area for the new superstructure. At the same time, it can improve the stability of the old pier masonry foundation in water, enabling the old pier masonry foundation to better resist the impact of water flow and the collision of floating objects in the water, thereby enhancing the compressive capacity and overall bearing capacity of the old pier masonry foundation and effectively ensuring the stability of the bridge structure; The fiberglass material has high strength, high modulus and good corrosion resistance, which can effectively buffer the direct impact of water flow on the new pier body of the old pier masonry foundation and reduce the risk of damage caused by water flow to the old pier masonry foundation.

[0012] Preferably, the new pier body includes a casting material and a frame net made by welding stirrups, main bars and implanted bars. The casting material is arranged on the outer wall of the old pier masonry foundation and is used to increase the cross-sectional area of the old pier masonry foundation. The frame net is arranged in the casting material and is fixedly connected to the old pier masonry foundation to improve the structural strength of the casting material.

[0013] By adopting the above technical solutions, the casting material is arranged on the outer wall of the old pier masonry foundation, mainly used to increase the cross-sectional area of the old pier masonry foundation and provide a steel bar anchorage area for the new superstructure. At the same time, it can enhance the compressive capacity and overall stability of the old pier masonry foundation, enabling it to better withstand the impact of water flow and the collision of floating objects in the water, effectively protecting the main structure of the old pier masonry foundation. The frame net is arranged in the casting material and is fixedly connected to the old pier masonry foundation. Its function is to improve the structural strength of the casting material, ensure that a firm whole is further formed between the new pier body and the old pier masonry foundation, enhance the durability and corrosion resistance of the old pier masonry foundation, reduce the damage caused by long-term water flow scouring and environmental factors to the old pier masonry foundation, extend the service life of the old pier masonry foundation, and reduce the maintenance cost and potential safety hazards of the bridge.

[0014] Preferably, it further includes a connecting component, and the connecting component is used to connect the old pier masonry foundation and the fiberglass sleeve to make the fiberglass sleeve and the old pier masonry foundation form a whole.

[0015] By adopting the above technical solutions, the design of the connecting component can improve the stability of the whole structure, prevent the fiberglass sleeve from shifting or loosening under the impact of water flow or other external forces, thereby ensuring the effective protection of the fiberglass sleeve for the old pier masonry foundation.

[0016] Preferably, the connecting component includes a fastening belt, which is detachably connected to the side of the fiberglass sleeve away from the newly added pier body. The fastening belt is used to limit the position of the fiberglass sleeve relative to the newly added pier body.

[0017] By adopting the above technical solution, the fastening belt can fix the fiberglass sleeve on the old pier masonry foundation, ensure close cooperation between the two, and jointly bear external loads. At the same time, the fastening belt can improve the stability of the whole structure, prevent the fiberglass sleeve from shifting or loosening under the impact of water flow or other external forces, so as to ensure the effective protection of the fiberglass sleeve on the old pier masonry foundation.

[0018] Preferably, the connecting component further includes a limiter, which is arranged on the side of the fiberglass sleeve close to the old pier masonry foundation. The limiter is fixedly connected to the fiberglass sleeve and the old pier masonry foundation. The limiter is used to limit the position of the fiberglass sleeve relative to the old pier masonry foundation, ensure enough space to insert the steel bar framework net and pour the casting material, and have a certain protective layer thickness.

[0019] By adopting the above technical solution, the limiter can ensure the stability of the fiberglass sleeve during installation and use, avoid displacement or loosening of the fiberglass sleeve caused by water flow impact or other external forces, so as to ensure the close cooperation and coordinated force between the fiberglass sleeve and the old pier masonry foundation, contribute to improving the stability of the whole structure, and enhance the impact resistance and durability of the old pier masonry foundation.

[0020] Preferably, the connecting component further includes a filling material, which is arranged between the fiberglass sleeve and the old pier masonry foundation, used to fill the area between the fiberglass sleeve and the old pier masonry foundation, fix the steel bar framework net and provide a sufficient protective layer thickness.

[0021] By adopting the above technical solution, the filling material can eliminate the gap between the fiberglass sleeve and the old pier masonry foundation, ensure their close fit, improve the stability and sealing performance of the overall structure. At the same time, the filling material can prevent water flow or other sundries from entering the gap, avoid damage to the connection part of the old pier masonry foundation and the fiberglass sleeve caused by water flow scouring or sundry accumulation, and further enhance the durability and corrosion resistance of the structure.

[0022] Preferably, the connecting component further includes a first connecting part and a second connecting part. The first connecting part is arranged at the top of the fiberglass sleeve and is fixedly connected to the newly added pier body. The first connecting part is used to seal the gap between the fiberglass sleeve and the old pier masonry foundation. The second connecting part is fixedly connected to the side of the fiberglass sleeve away from the newly added pier body and is fixedly connected to the riverbed to limit the position of the fiberglass sleeve.

[0023] By adopting the above technical solutions, the first connecting part can prevent water flow, debris, etc. from entering the space between the fiberglass sleeve and the old pier masonry foundation from the top of the fiberglass sleeve, further improving the sealing and corrosion resistance of the entire structure, protecting the connection part between the old pier masonry foundation and the fiberglass sleeve, reducing structural damage caused by water flow scouring or debris accumulation, enhancing the stability and durability of the structure, reducing the maintenance difficulty and cost, ensuring the safe operation of the bridge under various environmental conditions. The second connecting part provides additional support and positioning for the fiberglass sleeve through its fixed connection with the riverbed, preventing the fiberglass sleeve from undergoing horizontal displacement or tilting under the action of water flow impact or other external forces, ensuring that the fiberglass sleeve always closely fits the old pier masonry foundation and maintaining its effective protective effect on the old pier masonry foundation. At the same time, the fixed connection between the second connecting part and the riverbed can also disperse part of the water flow impact force, relieve the stress burden on the old pier masonry foundation, improve the stability of the entire structure, enhance the safety and reliability of the bridge under complex hydrological conditions, and extend the service life of the bridge.

[0024] Preferably, the second connecting part includes a toe protection, a steel plate, and a pipe. The toe protection is fixedly connected to the fiberglass sleeve and the riverbed. The steel plate covers the outer wall of the toe protection, and the steel plate is detachably connected to the fiberglass sleeve and the riverbed. The pipe is fixedly connected to the metal plate and penetrates through the metal plate.

[0025] By adopting the above technical solutions, the toe protection provides bottom support and positioning for the fiberglass sleeve, ensuring the stability of the fiberglass sleeve on the riverbed and preventing it from undergoing displacement or tilting under the action of water flow impact or other external forces. The steel plate covers the outer wall of the toe protection, which can not only further enhance the structural strength of the toe protection but also play a protective role, preventing debris or water flow in the riverbed from damaging the toe protection and the bottom of the fiberglass sleeve. The detachable connection design of the steel plate with the fiberglass sleeve and the riverbed facilitates installation, adjustment, or replacement when needed, improving the flexibility and maintenance convenience of the structure. The pipe is fixedly connected to the steel plate and penetrates through the steel plate, and can be used to inject any material.

[0026] Preferably, it further includes a newly added superstructure. The newly added superstructure is fixedly connected to the old pier masonry foundation, and the newly added superstructure is used for bearing weight to transfer the pressure to the old pier masonry foundation.

[0027] By adopting the above technical solutions, first install a framework net on the old pier masonry foundation, then set a limiter on the outer wall of the old pier masonry foundation. The outside of the limiter is wrapped with a fiberglass sleeve and the fiberglass sleeve is temporarily fixed. Then fill the casting material between the fiberglass sleeve and the old masonry pier and completely cover the steel bar framework net to complete the newly added pier body. Finally, steel bars can be planted on the newly added pier body for the construction of the newly added structure. The newly added superstructure transfers the load to the newly added pier body and finally transfers the load to the old pier masonry foundation.

[0028] In a second aspect, the present application provides a method for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve, and the following technical solution is adopted:

[0029] A method for adding a new pier body after surrounding an old masonry foundation with a fiberglass sleeve includes the following steps:

[0030] Clean the old pier masonry foundation and set a new pier body on the outer wall of the old pier masonry foundation;

[0031] Connect the new pier body and the fiberglass sleeve through a connecting component;

[0032] Set a new superstructure on the top of the old pier masonry foundation.

[0033] By adopting the above technical solution, cleaning the old pier masonry foundation and chiseling out the loose and eroded unstable blocks on the outer wall can provide a reliable and stable foundation for subsequent construction, ensure the effective bonding between the new pier body and the outer wall of the old pier masonry foundation, enhance the stability of the overall structure, setting the new pier body can increase the cross-sectional area of the old pier masonry foundation, improve the compressive capacity and overall stability of the old pier masonry foundation, provide a steel bar anchorage area for the new structure, enhance the durability and corrosion resistance of the old pier masonry foundation, the connecting component connects the new pier body and the fiberglass sleeve and firmly fixes the two together to form a whole, preventing the fiberglass sleeve from shifting or loosening under the impact of water flow or other external forces, ensuring the effective protection of the old pier masonry foundation, setting the new structure, the new structure can be used as a connecting component between the bridge superstructure and the old pier masonry foundation, bear the weight of the bridge superstructure, and safely transfer these loads to the old pier masonry foundation, ensuring the overall stability and bearing capacity of the bridge.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] The new pier body can increase the cross-sectional area of the old pier masonry foundation and provide a steel bar anchorage area for the new superstructure. At the same time, it can improve the stability of the old pier masonry foundation in water, enable the old pier masonry foundation to better resist the impact of water flow and the collision of floating objects in water, thereby enhancing the compressive capacity and overall bearing capacity of the old pier masonry foundation, and effectively ensuring the stability of the bridge structure; the fiberglass material has high strength, high modulus and good corrosion resistance, can effectively buffer the direct impact of water flow on the new pier body of the old pier masonry foundation, and reduce the risk of damage to the old pier masonry foundation caused by water flow;

[0036] The casting material is disposed on the outer wall of the old pier masonry foundation, mainly used to increase the cross-sectional area of the old pier masonry foundation and provide a steel bar anchorage area for the newly added superstructure. At the same time, it can enhance the compressive capacity and overall stability of the old pier masonry foundation, enabling it to better withstand the impact of water flow and the collision of floating objects in the water, effectively protecting the main structure of the old pier masonry foundation. The framework net is disposed within the casting material and is fixedly connected to the old pier masonry foundation. Its function is to improve the structural strength of the casting material, ensure that a firm whole is further formed between the newly added pier body and the old pier masonry foundation, enhance the durability and corrosion resistance of the old pier masonry foundation, reduce the damage caused to the old pier masonry foundation by long-term water flow scouring and environmental factors, extend the service life of the old pier masonry foundation, and reduce the maintenance cost and safety hazards of the bridge;

[0037] Clean the old pier masonry foundation, chisel out the loose and eroded unstable blocks on the outer wall, which can provide a reliable and stable foundation for subsequent construction, ensure the effective bonding between the newly added pier body and the outer wall of the old pier masonry foundation, and enhance the stability of the overall structure. Setting the newly added pier body can increase the cross-sectional area of the old pier masonry foundation, improve the compressive capacity and overall stability of the old pier masonry foundation, provide a steel bar anchorage area for the newly added structure, enhance the durability and corrosion resistance of the old pier masonry foundation. The connecting component connects the newly added pier body and the fiberglass sleeve and firmly fixes the two together to form a whole, preventing the fiberglass sleeve from shifting or loosening under the impact of water flow or other external forces, ensuring the effective protection of the old pier masonry foundation. Set the newly added structure. The newly added structure can be used as a connecting component between the bridge superstructure and the old pier masonry foundation, bear the weight of the bridge superstructure, and safely transfer these loads to the old pier masonry foundation, ensuring the overall stability and load-bearing capacity of the bridge. Description of the Drawings

[0038] Figure 1 is a structural schematic diagram of the structure of the newly added pier body after the old masonry foundation is surrounded by a fiberglass sleeve in the embodiment of the present application;

[0039] Figure 2 is a vertical sectional structural schematic diagram of the structure of the newly added pier body after the old masonry foundation is surrounded by a fiberglass sleeve in the embodiment of the present application;

[0040] Figure 3 is Figure 1 an enlarged view of A in

[0041] Figure 4 is Figure 2 an enlarged view of B in

[0042] Figure 5 is Figure 2 an enlarged view of C in

[0043] Description of the reference numerals: 1. Masonry foundation of the old pier; 11. New pier body; 111. Frame net; 112. Casting material; 12. New superstructure; 2. Glass fiber sleeve; 21. First part; 22. Second part; 23. Bifurcation; 24. Low elastic modulus hydrogenated epoxy glue; 3. Connection assembly; 31. Fastening band; 32. Limiter; 33. Filling material; 331. Underwater cement-based grouting material; 332. Underwater epoxy grouting material; 333. Sealing rubber strip; 34. First connection part; 35. Second connection part; 351. Toe protection; 352. Steel plate; 353. Pipeline. Detailed implementation manners

[0044] The following further describes the present application in conjunction with the Figures 1 - 5 accompanying drawings.

[0045] An embodiment of the present application discloses a structure of a new pier body after the old masonry foundation is surrounded by a glass fiber sleeve. Referring to Figure 1 and Figure 2 , the structure of the new pier body after the old masonry foundation is surrounded by a glass fiber sleeve includes a glass fiber sleeve 2, a connection assembly 3, a new superstructure 12, and an old pier masonry foundation 1 provided with a new pier body 11.

[0046] As Figure 2 shown, the old pier masonry foundation 1 is arranged on the riverbed, and a new pier body 11 fixedly connected to the old pier masonry foundation 1 is arranged on the outer wall of the old pier masonry foundation 1. The new pier body 11 is used to increase the cross-sectional area of the old pier masonry foundation 1; by increasing the cross-sectional area of the old pier masonry foundation 1 through the new pier body 11, a steel bar anchorage area can be provided for the new superstructure 12. At the same time, the stability of the old pier masonry foundation 1 in water can be improved, so that the old pier masonry foundation 1 can better resist the impact of water flow and the collision of floating objects in the water, thereby enhancing the compressive capacity and durability of the old pier masonry foundation 1 and effectively ensuring the stability of the bridge structure.

[0047] In the embodiment of the present application, the newly added pier body 11 includes a casting material 112 and a frame net 111 made by welding stirrups, main reinforcement bars and implanted bars. The casting material 112 is arranged on the outer wall of the old pier masonry foundation 1 for increasing the cross-sectional area of the old pier masonry foundation 1. The frame net 111 is arranged in the casting material 112, and the frame net 111 is fixedly connected to the old pier masonry foundation 1 to improve the structural strength of the casting material 112. The casting material 112 is arranged on the outer wall of the old pier masonry foundation 1, mainly for increasing the cross-sectional area of the old pier masonry foundation 1, thereby enhancing the compressive capacity and overall stability of the old pier masonry foundation 1, enabling it to better withstand the impact of water flow and the collision of floating objects in the water, effectively protecting the main structure of the old pier masonry foundation 1. The frame net 111 is arranged in the casting material 112, and the frame net 111 is fixedly connected to the old pier masonry foundation 1. Its function is to improve the structural strength of the casting material 112, ensure that a firm whole is further formed between the newly added pier body 11 and the old pier masonry foundation 1, enhance the durability and corrosion resistance of the old pier masonry foundation 1, reduce the damage caused to the old pier masonry foundation 1 by long-term water flow scouring and environmental factors, extend the service life of the old pier masonry foundation 1, and reduce the maintenance cost and safety hazards of the bridge.

[0048] As Figure 1 and Figure 3 shown, the fiberglass sleeve 2 is fixedly connected to the newly added pier body 11 for reducing the water flow impact on the newly added pier body 11. Exemplarily, the cross-sectional shape of the newly added pier body 11 is approximately spindle-shaped, the middle section of the newly added pier body 11 is straightly arranged. The fiberglass sleeve 2 includes a first part 21 and a second part 22. The first part 21 is in a sheet shape, and the first part 21 is fixedly connected to the side wall of the newly added pier body 11. The second part 22 is in an arc shape, arranged at the end of the newly added pier body 11, and the second part 22 is detachably connected to the first part 21.

[0049] Exemplarily, one end of the first part 21 close to the second part 22 is provided with a bend, one end of the second part 22 close to the first part 21 is provided with a fork 23, the end of the first part 21 is inserted into the fork 23 of the second part 22, the first part 21 is detachably connected by a screw passing through the end of the first part 21 and the fork 23 of the second part 22, and a low elastic modulus hydrogenated epoxy adhesive 24 is arranged in the fork 23, and the low elastic modulus hydrogenated epoxy adhesive 24 is fixedly connected to the first part 21 and the second part 22.

[0050] Exemplarily, the fiberglass sleeve 2 can also be arranged only on the water-facing side of the newly added pier body 11.

[0051] As Figure 4 and Figure 5As shown in the figure, the connecting component 3 is used to connect the old pier masonry foundation 1 and the glass fiber sleeve 2, so that the glass fiber sleeve 2 and the old pier masonry foundation 1 form an integral whole. It includes a fastening band 31, a limiter 32, a filling material 33, a first connecting part 34 and a second connecting part 35. The design of the connecting component 3 can improve the stability of the whole structure, prevent the glass fiber sleeve 2 from displacing or loosening under the impact of water flow or other external forces, so as to ensure the effective protection of the glass fiber sleeve 2 on the old pier masonry foundation 1.

[0052] In the embodiment of the present application, the fastening band 31 is detachably connected to the side of the glass fiber sleeve 2 away from the newly added pier body 11. The fastening band 31 is used to limit the position of the glass fiber sleeve 2 relative to the newly added pier body 11. Exemplarily, the fastening band 31 is sleeved on the outer wall of the glass fiber sleeve 2, and the glass fiber sleeve 2 is fixed on the newly added pier body 11 by abutting, ensuring a tight fit between the two, enhancing the durability of the newly added pier body 11, and preventing the newly added pier body 11 from being damaged by the erosion of water flow. At the same time, the fastening band 31 can improve the stability of the whole structure, prevent the glass fiber sleeve 2 from displacing or loosening under the impact of water flow or other external forces, so as to ensure the effective protection of the glass fiber sleeve 2 on the newly added pier body 11.

[0053] It should be noted that the limiter 32 is arranged on the side of the glass fiber sleeve 2 close to the old pier masonry foundation 1. The limiter 32 is fixedly connected to the glass fiber sleeve 2 and the old pier masonry foundation 1. The limiter 32 is used to limit the position of the glass fiber sleeve 2 relative to the old pier masonry foundation 1, ensure enough space is reserved to insert the frame net 111 and pour the casting material 112, and have a certain protective layer thickness. The limiter 32 can ensure that the glass fiber sleeve 2 remains stable during installation and use, avoid the glass fiber sleeve 2 from displacing or loosening due to the impact of water flow or other external forces, so as to ensure the tight fit between the glass fiber sleeve 2 and the old pier masonry foundation 1, help improve the stability of the whole structure, and enhance the impact resistance and durability of the old pier masonry foundation 1.

[0054] Exemplarily, the filling material 33 includes an underwater cement-based grouting material 331, an underwater epoxy grouting material 332, and a sealing rubber strip 333; the underwater cement-based grouting material 331 is disposed between the glass fiber sleeve 2 and the old pier masonry foundation 1 to fill the gap between the glass fiber sleeve 2 and the old pier masonry foundation 1, the sealing rubber strip 333 is disposed on the side of the underwater cement-based grouting material 331 close to the riverbed, and the underwater epoxy grouting material 332 is disposed between the cement-based grouting material and the sealing rubber strip 333; the filling material 33 can eliminate the area between the glass fiber sleeve 2 and the old pier masonry foundation 1, fix the frame net 111 and provide a sufficient protective layer thickness to ensure their close fit, improve the stability and tightness of the overall structure. At the same time, the filling material 33 can prevent water flow or other sundries from entering the gap, avoiding damage to the connection part of the old pier masonry foundation 1 and the glass fiber sleeve 2 caused by water flow scouring or sundry accumulation, and further enhancing the durability and corrosion resistance of the structure; moreover, the positioner 32 can limit the position between the glass fiber sleeve 2 and the old pier masonry foundation 1, thereby ensuring the thickness of the filling material 33 and strengthening the non-necking of the cross-section surface.

[0055] Please refer to Figure 4 and Figure 5 As shown in FIGS. and, the first connecting portion 34 is disposed at the top of the glass fiber sleeve 2, and the first connecting portion 34 is fixedly connected to the newly added pier body 11. The first connecting portion 34 is used to close the gap between the glass fiber sleeve 2 and the old pier masonry foundation 1. The second connecting portion 35 is fixedly connected to the surface of the glass fiber sleeve 2 away from the newly added pier body 11, and the second connecting portion 35 is fixedly connected to the riverbed to limit the position of the glass fiber sleeve 2; the first connecting portion 34 can prevent water flow, sundries, etc. from entering the space between the glass fiber sleeve 2 and the old pier masonry foundation 1 from the top of the glass fiber sleeve 2, further improving the tightness and corrosion resistance of the entire structure, protecting the connection part of the old pier masonry foundation 1 and the glass fiber sleeve 2, reducing the structural damage caused by water flow scouring or sundry accumulation, enhancing the stability and durability of the structure, reducing the maintenance difficulty and cost, and ensuring the safe operation of the bridge under various environmental conditions. The second connecting portion 35 provides additional support and positioning for the glass fiber sleeve 2 through its fixed connection with the riverbed, preventing the glass fiber sleeve 2 from undergoing horizontal displacement or tilting under the action of water flow impact or other external forces, ensuring that the glass fiber sleeve 2 always closely fits the old pier masonry foundation 1 and maintaining its effective protective effect on the old pier masonry foundation 1. At the same time, the fixed connection between the second connecting portion 35 and the riverbed can also disperse part of the water flow impact force, reduce the stress burden on the old pier masonry foundation 1, improve the stability of the entire structure, enhance the safety and reliability of the bridge under complex hydrological conditions, and extend the service life of the bridge.

[0056] Exemplarily, please refer to Figure 4 and Figure 5In the embodiment of the present application, the first connecting portion 34 is a slope formed by underwater epoxy capping glue, and the first connecting portion 34 is fixedly connected to the newly added pier body 11 and the fiberglass sleeve 2; the second connecting portion 35 includes a foot guard 351, a steel plate 352 and a pipe 353, the foot guard 351 is fixedly connected to the fiberglass sleeve 2 and the riverbed, the steel plate 352 covers the outer wall of the foot guard 351, and the steel plate 352 is detachably connected to the fiberglass sleeve 2 and the riverbed, the pipe 353 is fixedly connected to the metal plate, and the pipe 353 passes through the metal plate, the foot guard 351 provides bottom support and positioning for the fiberglass sleeve 2, ensures the stability of the fiberglass sleeve 2 on the riverbed, and prevents it from being impacted by water or If displacement or tilt occurs under the action of other external forces, the steel plate 352 covers the outer wall of the foot guard 351, which can not only further enhance the structural strength of the foot guard 351, but also play a protective role to prevent debris or water flow in the riverbed from damaging the foot guard 351 and the bottom of the fiberglass sleeve 2. The detachable connection design of the steel plate 352, the fiberglass sleeve 2 and the riverbed is convenient for installation, adjustment or replacement when needed, which improves the flexibility and maintenance convenience of the structure. The pipe 353 is fixedly connected to the steel plate 352 and passes through the steel plate 352, and can be used to inject any material. After the foot guard 351 is cast, the pipe 353 is removed and the grouting channel on the metal plate is closed.

[0057] like Figure 1 As shown, the newly added superstructure 12 is fixedly connected to the old pier masonry foundation 1. The newly added superstructure 12 can be used to bear the weight and transfer the upper pressure to the old pier masonry foundation 1; the old pier masonry foundation 1 can bear the weight of the upper part and transfer the load to the old pier masonry foundation 1; illustratively, in this embodiment of the present application, the fiberglass sleeve 2 opposite to the newly added superstructure 12 is turned up, and the post-cast foundation is surrounded at the corresponding position.

[0058] The present application also discloses a method for adding a pier body after surrounding an old masonry foundation with a fiberglass sleeve. The method for adding a pier body after surrounding an old masonry foundation with a fiberglass sleeve comprises the following steps:

[0059] S1 , cleaning the old pier stone foundation 1 , and fixing the fiberglass sleeve 2 and the frame net 111 through the fastening belt 31 and the second connecting part 35 .

[0060] Exemplarily, in this step, underwater divers are used to clean weeds and roughen the old interface. Equipment such as ultrasonic detectors and rebound hammers are used to detect the concrete strength and internal defects of the old pier masonry foundation 1, and the parts that need to be key-reinforced are marked. Drill holes on the surface of the old pier masonry foundation 1 and implant reinforcing bars. When drilling, ensure that the hole depth and hole diameter meet the design requirements. Clean the holes before implanting the reinforcing bars, and conduct a pull-out test after implanting the reinforcing bars to ensure the anchoring effect of the reinforcing bars. Select high-strength and durable concrete as the pouring material 112, and strictly control the concrete mix ratio to ensure that its performance meets the design requirements. According to the shape and size of the old pier masonry foundation 1, manufacture and install customized templates. The templates should have sufficient strength and stiffness to prevent deformation during the pouring process. Bind the prefabricated stirrups and main reinforcing bars according to the design requirements to form a steel bar framework, and install it on the outer wall of the old pier masonry foundation 1 and connect it with the reinforcing bars implanted in the old pier masonry foundation 1 to enhance the integrity. Continuously pour concrete to form a new pier body 11 on the outer wall of the old pier masonry foundation 1; cleaning the old pier masonry foundation 1 can provide a clean and flat foundation for subsequent construction, ensure the close fit between the new pier body 11 and the outer wall of the old pier masonry foundation 1, and enhance the stability of the overall structure. Setting the new pier body 11 can increase the cross-sectional area of the old pier masonry foundation 1, improve the compressive capacity and overall stability of the old pier masonry foundation 1, and enhance the durability and corrosion resistance of the old pier masonry foundation 1.

[0061] It should be noted that the structure in this application can support the wet operation method, that is, there is no need to enclose and drain during the construction process, and it can be directly carried out in water. The operation is flexible, the construction process takes less time, the impact on the waterway and / or the surrounding environment is small, and the environmental load is low.

[0062] S2. Then pour the filling material 33 and the new pier body 11.

[0063] Exemplarily, in this step, according to the size and shape of the old pier masonry foundation 1, a fiberglass sleeve 2 of appropriate specifications is cut to ensure that it fits tightly with the new pier body 11 of the old pier masonry foundation 1. The number of layers and thickness of the fiberglass sleeve 2 should meet the design requirements to ensure its protective performance. One end of the fastening band 31 is connected to the side of the fiberglass sleeve 2 away from the new pier body 11, and a detachable connection method is adopted, such as a buckle or a binding band. The tightness of the fastening band 31 is adjusted to preliminarily fix the fiberglass sleeve 2 on the new pier body 11 to prevent displacement during subsequent installation. On the side of the fiberglass sleeve 2 close to the old pier masonry foundation 1, a stopper 32 is installed. The stopper 32 is fixedly connected to the fiberglass sleeve 2 and the old pier masonry foundation 1 by bolts or welding, etc. The position of the stopper 32 is precisely adjusted to ensure that it can effectively limit the position of the fiberglass sleeve 2 relative to the old pier masonry foundation 1 and improve the stability of the structure. Appropriate filling materials 33 are selected, such as underwater cement-based grouting material 331, underwater epoxy grouting material 332, and sealing rubber strip 333, etc. A special device is used to inject the filling material 33 into the gap between the fiberglass sleeve 2 and the old pier masonry foundation 1. During the filling process, it is necessary to ensure that the filling is dense and there are no voids.

[0064] After the filling is completed, the filling material 33 is cured to reach the design strength. The first connecting part 34 forms a slope with underwater epoxy capping glue, which is applied to the top of the fiberglass sleeve 2 and is tightly connected to the new pier body 11 to ensure the sealing and corrosion resistance of the connection; the foot protection 351 of the second connecting part 35 is made of precast concrete blocks or gabion nets, which is installed at the bottom of the fiberglass sleeve 2 and fixedly connected to the riverbed. The outer wall of the foot protection 351 is covered with a steel plate 352. The steel plate 352 is detachably connected to the fiberglass sleeve 2 and the riverbed by bolts or welding. During the installation process, the firmness and stability of the connection should be ensured. The pipeline 353 is fixedly connected to the steel plate 352 and penetrates through the steel plate 352, which can be used to inject other materials to enhance the integrity of the structure; the connecting component 3 connects the new pier body 11 and the fiberglass sleeve 2 and firmly fixes the two together to form a whole, jointly bearing external loads, preventing the fiberglass sleeve 2 from displacing or loosening under the impact of water flow or other external forces, and ensuring the effective protection of the old pier masonry foundation 1.

[0065] S3. Set up a new superstructure 12 on the top of the new pier body 11.

[0066] Exemplarily, when demolishing the old and adding the new superstructure 12, some of the original column steel bars at the top of the old pier masonry foundation 1 can be retained. In this step, using the original column steel bars as the installation position, ensure that the center line of the new superstructure 12 coincides with that of the old pier masonry foundation 1. Use surveying instruments such as total stations for positioning to ensure the accuracy of installation. Use a crane to hoist the prefabricated new superstructure 12 to the top of the old pier masonry foundation 1. During the hoisting process, ensure the verticality of the new superstructure 12 and use guy ropes for adjustment. After the new superstructure 12 is in place, promptly carry out temporary fixation to prevent it from toppling. Connect the new superstructure 12 and the old pier masonry foundation 1 by welding or bolting through the embedded steel bars or connectors to ensure the firmness and reliability of the connection. After the connection is completed, carry out anti-corrosion treatment on the connection part, such as applying anti-corrosion paint, etc., to extend the service life of the structure.

[0067] It should be noted that during construction, the stirrups and interactive steel bars such as main steel bars should pay attention to forming an integral framework by spot welding; only the construction of bonded rebar for interface reinforcement is involved to strengthen the bond of the interface; the bonded rebar should be avoided from being implanted into the mortar joints or edges of the masonry, and should be implanted into the rubble to ensure the quality of the bonded rebar. The bonded rebar of the main beam should be implanted and completed in batches, and the number of implanted bars in each batch should not exceed 10 preferably, and all the bonded rebar should not be drilled at one time.

[0068] Specifically, clean the old pier masonry foundation 1 and chisel off the loose and eroded unstable blocks on the outer wall, which can provide a reliable and stable foundation for subsequent construction, ensure the effective bond between the new pier body 11 and the outer wall of the old pier masonry foundation 1, and enhance the stability of the overall structure. Setting the new pier body 11 can increase the cross-sectional area of the old pier masonry foundation 1, improve the compressive capacity and overall stability of the old pier masonry foundation 1, provide a steel bar anchorage area for the new superstructure 12, enhance the durability and corrosion resistance of the old pier masonry foundation 1. The connecting component 3 connects the new pier body 11 and the fiberglass sleeve 2 and firmly fixes the two together to form an integral body, preventing the fiberglass sleeve 2 from shifting or loosening under the impact of water flow or other external forces, and ensuring the effective protection of the old pier masonry foundation 1. Set the new superstructure 12. The new superstructure 12 can be used as the connection between structures such as bridges and the old pier masonry foundation 1, bear the weight of structures such as bridges, and safely transfer these loads to the old pier masonry foundation 1 to ensure the overall stability and bearing capacity.

[0069] Optionally, in another embodiment of the present application, a frame net 111 is installed on the old pier masonry foundation 1 first, and then a stopper 32 is provided on the outer wall of the old pier masonry foundation 1. A fiberglass sleeve 2 is wrapped around the outside of the stopper 32 and temporarily fixed. Then, a pouring material 112 is filled between the fiberglass sleeve 2 and the old pier masonry foundation 1 and completely covers the frame net 111 to complete the new pier body 11. Finally, steel bars can be implanted on the new pier body 11 to construct the new superstructure 12. The new superstructure 12 transfers the load to the new pier body 11 and ultimately transfers the load to the old pier masonry foundation 1.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A structure for adding a new pier body after surrounding an old masonry foundation with a glass fiber sleeve, characterized in that, Comprising: An old pier masonry foundation (1) located at the riverbed, with a newly added pier body (11) fixedly connected to the outer wall of the old pier masonry foundation (1). The newly added pier body (11) is used to increase the cross-sectional area of the old pier masonry foundation (1) and serve as the steel bar anchorage area for the upper structure; A fiberglass sleeve (2), fixedly connected to the newly added pier body (11), for reducing the water flow impact on the newly added pier body (11); The newly added pier body (11) includes a casting material (112) and a frame net (111) made by welding stirrups, main bars and implanted bars. The casting material (112) is arranged on the outer wall of the old pier masonry foundation (1) to increase the cross-sectional area of the old pier masonry foundation (1). The frame net (111) is arranged in the casting material (112), and the frame net (111) is fixedly connected to the old pier masonry foundation (1) to serve as the connection between the newly added upper structure and the old masonry foundation; It further includes a connection assembly (3). The connection assembly (3) is used to connect the old pier masonry foundation (1) and the fiberglass sleeve (2) so that the fiberglass sleeve (2) and the old pier masonry foundation (1) form an integral body; The connection assembly (3) includes a fastening belt (31). The fastening belt (31) is detachably connected to the side of the fiberglass sleeve (2) away from the newly added pier body (11). The fastening belt (31) is used to limit the position of the fiberglass sleeve (2) relative to the newly added pier body (11); The connection assembly (3) further includes a limiter (32). The limiter (32) is arranged on the side of the fiberglass sleeve (2) close to the old pier masonry foundation (1). The limiter (32) is fixedly connected to the fiberglass sleeve (2) and the old pier masonry foundation (1). The limiter (32) is used to limit the position of the fiberglass sleeve (2) relative to the old pier masonry foundation (1); The connection assembly (3) further includes a filling material (33). The filling material (33) is arranged between the fiberglass sleeve (2) and the old pier masonry foundation (1) for filling the area between the fiberglass sleeve (2) and the old pier masonry foundation (1).

2. The structure of adding a new pier body after surrounding the old masonry foundation with a glass fiber sleeve according to claim 1, characterized in that: The connection assembly (3) further includes a first connection part (34) and a second connection part (35). The first connection part (34) is arranged at the top of the fiberglass sleeve (2). The first connection part (34) is fixedly connected to the newly added pier body (11). The first connection part (34) is used to seal the gap between the fiberglass sleeve (2) and the old pier masonry foundation (1). The second connection part (35) is fixedly connected to the side of the fiberglass sleeve (2) away from the newly added pier body (11), and the second connection part (35) is fixedly connected to the riverbed to limit the position of the fiberglass sleeve (2).

3. The structure of adding a new pier body after surrounding the old masonry foundation with a glass fiber sleeve according to claim 2, characterized in that: The second connection part (35) includes a toe protection (351), a steel plate (352) and a pipe (353). The toe protection (351) is fixedly connected to the fiberglass sleeve (2) and the riverbed. The steel plate (352) covers the outer wall of the toe protection (351), and the steel plate (352) is detachably connected to the fiberglass sleeve (2) and the riverbed. The pipe (353) is fixedly connected to the steel plate (352), and the pipe (353) penetrates through the steel plate (352).

4. The structure of adding a new pier body after surrounding the old masonry foundation with a glass fiber sleeve according to claim 3, wherein: It further includes a newly added upper structure (12). The newly added upper structure (12) is fixedly connected to the newly added pier body (11) through conventional steel bar post-inserted anchoring. The newly added pier body (11) is fixedly connected to the old pier masonry foundation (1) through a frame net (111). The newly added upper structure (12) can be used for bearing weight and finally transmits the pressure to the old pier masonry foundation (1).

5. A method for adding a new pier body after surrounding an old masonry foundation with a glass fiber sleeve, using the structure for adding a new pier body after surrounding an old masonry foundation with a glass fiber sleeve as described in claim 4, characterized in that, It includes the following steps: Clean the old pier masonry foundation (1), and fix the glass fiber sleeve (2) and the frame net (111) through a fastening belt (31) and a second connecting part (35); Then pour the filling material (33) and the newly added pier body (11); Set the newly added upper structure (12) at the top of the newly added pier body (11).

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