A method for manufacturing a thermoplastic FRP tendon sheath

Abstract

The application discloses a kind of thermoplastic FRP tendon wheel ridge structure manufacturing method, comprising the following steps: on-site bending multiple thermoplastic FRP tendons, forming multiple U-shaped tendons;U-shaped tendon bending place is daubed with curing agent;Prepared mould is sleeved in the bending place of U-shaped tendon;The mould is connected and fixed;U-shaped tendon is connected to the tendon of the panel of the wheel ridge structure to be installed;First longitudinal tendon is inserted in the bending place of multiple U-shaped tendons respectively, and first longitudinal tendon passes through the first through-hole of mould;The gap between the hole of mould and U-shaped tendon, first longitudinal tendon is sealed by sealant;Grouting is carried out in mould through the open end of mould;The outer surface structure of wheel ridge structure is built using steel formwork, and concrete is poured.The application uses thermoplastic FRP tendon to replace steel bar for ocean engineering construction, which can effectively solve the corrosion problem, greatly improve the service performance and service life of ocean engineering structure, and the economic benefit is very significant.

Description

Technical Field

[0001] This application belongs to the field of thermoplastic fiber-reinforced polymer (FRP) reinforcement technology, specifically relating to a method for manufacturing a thermoplastic FRP reinforcement wheel guard structure. Background Technology

[0002] Traditional reinforced concrete structures are susceptible to corrosion in marine environments, leading to structural performance degradation. Composite reinforcement has begun to be gradually applied in marine engineering to solve the corrosion problem. However, traditional composite reinforcement is mainly composed of thermosetting resin and fiber, which cannot be bent on site. In addition, thermosetting resin matrix also has problems such as high moisture absorption, poor toughness, and easy to exacerbate durability degradation under the coupling of environmental and service loads, which greatly limits the application and promotion of composite reinforcement.

[0003] In comparison, thermoplastic resin-based composite reinforcement has advantages such as repeated molding, high toughness, and good durability, which better meet the needs of marine engineering applications. However, after on-site bending, the performance of thermoplastic resin-based composite reinforcement will decrease at the bending point. To address this, a novel joint reinforcement technology is proposed and applied to the wharf fender structure, forming a method for manufacturing thermoplastic FRP reinforcement fender structures. Summary of the Invention

[0004] In view of the shortcomings or deficiencies of the prior art, the technical problem to be solved by this application is to provide a method for manufacturing a thermoplastic FRP rib wheel guard structure.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] This application proposes a method for manufacturing a thermoplastic FRP ribbed wheel guard structure, comprising the following steps:

[0007] On-site, multiple thermoplastic FRP bars were bent to form multiple U-shaped bars;

[0008] Apply a curing agent to the bend of the U-shaped rib;

[0009] The prefabricated mold is fitted onto the bend of the U-shaped rib;

[0010] Connect and fix the mold;

[0011] Connect the U-shaped ribs to the ribs of the panel on which the wheel guard structure is to be installed;

[0012] First longitudinal ribs are inserted at the bends of the multiple U-shaped ribs, and the first longitudinal ribs pass through the first through hole of the mold;

[0013] The gaps between the hole in the mold and the U-shaped rib and the first longitudinal rib are sealed with a sealant.

[0014] Grout is poured into the mold through the open end of the mold;

[0015] The outer surface structure of the wheel guard structure was constructed using steel formwork, and then concrete was poured.

[0016] Optionally, in the above-described method for manufacturing a thermoplastic FRP ribbed wheel guard structure, the mold includes: a four-sided structure and a plate structure that match each other; the four-sided structure includes: a first side, a second side, a third side, and a bottom surface, wherein the first side, the second side, and the third side are sequentially connected and respectively connected to the bottom surface; the plate structure is matched with the second side; the first side and the third side have first through holes for the first longitudinal rib to pass through; the bottom surface and the plate structure have second through holes for the U-shaped rib to pass through.

[0017] Optionally, in the above-mentioned method for manufacturing a thermoplastic FRP rib wheel guard structure, the mold is made of polyvinyl chloride.

[0018] Optionally, in the above-described method for manufacturing a thermoplastic FRP rib wheel guard structure, the curing agent and / or the sealant includes epoxy resin materials.

[0019] Optionally, in the above-mentioned method for manufacturing a thermoplastic FRP rib wheel guard structure, the grout used for grouting into the mold has a 1-day compressive strength ≥ 50 MPa and a 28-day compressive strength ≥ 150 MPa.

[0020] Optionally, in the above-mentioned method for manufacturing a thermoplastic FRP reinforcing wheel chock structure, the grouting in the mold requires a curing time of more than one day.

[0021] Optionally, in the above-mentioned method for manufacturing a thermoplastic FRP rib wheel guard structure, the open end of the U-shaped rib is further provided with a hook portion for connecting with the second longitudinal rib.

[0022] Optionally, in the above-described method for manufacturing a thermoplastic FRP rib wheel guard structure, the second longitudinal rib is fixedly connected to the U-shaped rib and / or the U-shaped rib is fixedly connected to the rib of the panel by binding.

[0023] Optionally, in the above-mentioned method for manufacturing a thermoplastic FRP rib wheel guard structure, the spacing between adjacent U-shaped ribs is 15-30cm.

[0024] Optionally, the above-mentioned method for manufacturing a thermoplastic FRP reinforced wheel guard structure further includes: curing the wheel guard structure after the steel template has been removed.

[0025] Compared with the prior art, this application has the following technical effects:

[0026] This application fully utilizes the material characteristics of thermoplastic FRP bars, namely their lightweight, high strength, and corrosion resistance, to effectively solve corrosion problems by replacing steel bars in marine engineering construction. This significantly improves the service performance and lifespan of marine engineering structures, resulting in substantial economic benefits. Furthermore, thermoplastic FRP bars can be processed and bent on-site, greatly improving construction efficiency. This application reinforces the joint connection by grouting into the mold at the bend of the U-shaped bar and inserting longitudinal bars. This significantly compensates for the strength loss of the thermoplastic FRP bars due to bending, substantially improving the shear resistance of the joint and enhancing the overall stiffness and durability of the structure. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 : A cross-sectional schematic diagram of a wheel guard structure according to an embodiment of this application;

[0029] Figure 2 : A schematic diagram of the bend of the U-shaped rib in one embodiment of this application;

[0030] Figure 3 : A schematic diagram of a four-sided structure in one embodiment of this application;

[0031] Figure 4 : A schematic diagram of the plate structure in one embodiment of this application;

[0032] In the figure: 1. U-shaped rib; 2. First longitudinal rib; 3. Second longitudinal rib; 4. Four-sided structure; 5. First side; 6. Second side; 7. Third side; 8. Bottom surface; 9. Plate structure; 10. Open end; 11. Panel; 12. First through hole; 13. Second through hole; 14. Hook portion. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figure 1 and Figure 2As shown in one embodiment of this application, a method for manufacturing a thermoplastic FRP ribbed wheel chock structure includes the following steps:

[0035] On-site, multiple thermoplastic FRP bars were bent to form multiple U-shaped bars 1;

[0036] Apply curing agent to the bending point of the U-shaped rib 1;

[0037] The prefabricated mold is fitted onto the bend of the U-shaped rib 1;

[0038] Connect and fix the mold;

[0039] Connect the U-shaped rib 1 to the rib of the panel 11 of the wheel guard structure to be installed;

[0040] First longitudinal ribs 2 are inserted at the bends of the multiple U-shaped ribs 1, and the first longitudinal ribs 2 pass through the first through hole 12 of the mold;

[0041] The gaps between the hole in the mold and the U-shaped rib 1 and the first longitudinal rib 2 are sealed with a sealant.

[0042] Grout is poured into the mold through the open end 10 of the mold;

[0043] The outer surface structure of the wheel guard structure was constructed using steel formwork, and then concrete was poured.

[0044] This embodiment fully utilizes the material characteristics of thermoplastic FRP bars, which are lightweight, high-strength, and corrosion-resistant. Replacing steel bars with conventional steel bars in marine engineering construction can effectively solve corrosion problems, significantly improve the service performance and lifespan of marine engineering structures, and offer substantial economic benefits. Furthermore, thermoplastic FRP bars can be processed and bent on-site, greatly improving construction efficiency. In this embodiment, by grouting into the mold at the bending point of the U-shaped bar and inserting longitudinal bars, a joint connection reinforcement function is achieved. This significantly compensates for the strength loss of the thermoplastic FRP bars due to bending, significantly improves the shear resistance of the joint, and enhances the overall stiffness and durability of the structure.

[0045] Optionally, using E 钢 A 钢 =E FRP筋 A FRP筋 Formula for converting the cross-sectional diameter of thermoplastic FRP bars, where E 钢 Let A be the elastic modulus of the reinforcing steel. 钢 E represents the cross-sectional area of ​​the reinforcing bar. FRP筋 Let be the elastic modulus of the thermoplastic FRP bar. Using the above formula, we can determine the cross-sectional area of ​​the thermoplastic FRP bar required to replace steel bars while maintaining the same stiffness.

[0046] Optionally, the mold is made of polyvinyl chloride and can be directly used as an internal component, which improves the overall rigidity of the structure and reduces the time for mold removal, thereby improving construction efficiency.

[0047] Specifically, the mold includes: a four-sided structure 4 and a plate structure 9 that match each other; the four-sided structure 4 includes: a first side 5, a second side 6, a third side 7 and a bottom surface 8, the first side 5, the second side 6 and the third side 7 are connected in sequence and respectively connected to the bottom surface 8; the plate structure 9 is matched with the second side 6; the first side 5 and the third side 7 have a first through hole 12 for the first longitudinal rib 2 to pass through; the bottom surface 8 and the plate structure 9 have a second through hole 13 for the U-shaped rib 1 to pass through.

[0048] In this embodiment, the U-shaped rib 1 passes through the second through holes 13 of the two sets of bottom surfaces 8 and plate structure 9, respectively located at the two bends of the U-shaped rib 1. Since a curing agent is already present on the U-shaped rib 1 before the mold is installed, the relative position of the mold to the U-shaped rib 1 is fixed after installation. At the same time, the curing agent can also fill the gap between the second through hole 13 and the U-shaped rib 1.

[0049] Specifically, the mold is connected and fixed by fixing the four-sided structure 4 to the plate structure 9, and applying a curing agent at the edge where the four-sided structure 4 and the plate structure 9 are connected, so that the four-sided structure 4 and the plate structure 9 form a five-sided structure with an open end 10.

[0050] Specifically, the open end 10 of the U-shaped rib 1 is also provided with a hook portion 14 for connecting with the second longitudinal rib 3, so as to facilitate a stable connection with the second longitudinal rib 3. The U-shaped rib 1 is connected to the rib of the panel 11 through the second longitudinal rib 3, which can be done by binding.

[0051] Optionally, the spacing between adjacent U-shaped ribs 1 is set to 15-30cm to ensure the strength of the wheel guard structure. In this embodiment, the spacing between the U-shaped ribs 1 is set to 20cm.

[0052] Specifically, after fixing the U-shaped rib 1, the first longitudinal rib 2 is inserted into the first through hole 12 of the mold to reinforce the bend of the U-shaped rib 1. A sealant is then used to seal the gap between the first longitudinal rib 2 and the first through hole 12.

[0053] Optionally, the curing agent and / or sealant includes, but is not limited to, epoxy resin materials.

[0054] In this embodiment, both the curing agent and the sealant are epoxy resin materials. The relative position of the mold on the U-shaped rib 1, the connection between the four-sided structure 4 and the plate structure 9, the sealing of the gap between the first longitudinal rib 2 and the first through hole 12, and the sealing of the gap between the U-shaped rib 1 and the second through hole 13 are all completed using epoxy resin materials. After each work is completed, it is necessary to wait 6 to 12 hours to ensure solidification.

[0055] Specifically, grout is injected into the mold, and the grout used is capable of meeting the conditions of 1-day compressive strength ≥ 50 MPa and 28-day compressive strength ≥ 150 MPa.

[0056] In this embodiment, the grout used is UHPG120 grout from Ugotech, specifically a DSP-modified cement-based grouting material, which can further reinforce the bending points of the U-shaped reinforcement 1. Of course, those skilled in the art can use other suitable grouting materials. The grouting material used in this example requires a curing time of more than one day.

[0057] Specifically, the outer surface structure of the wheel guard is built on the outside of the U-shaped reinforcement 1, the first longitudinal reinforcement 2, and the second longitudinal reinforcement 3 using steel formwork, and concrete is poured. After 3 to 7 days, the steel formwork is removed to form the wheel guard structure, which is then cured for 28 days.

[0058] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0061] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. The preferred embodiments have been described in detail. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A method for manufacturing a thermoplastic FRP (fiberglass reinforced plastic) ribbed wheel guard structure. Its features are, Includes the following steps: On-site, multiple thermoplastic FRP bars were bent to form multiple U-shaped bars; Apply a curing agent to the bend of the U-shaped rib; The prefabricated mold is fitted onto the bend of the U-shaped rib; Connect and fix the mold; Connect the U-shaped ribs to the ribs of the panel on which the wheel guard structure is to be installed; First longitudinal ribs are inserted at the bends of the multiple U-shaped ribs, and the first longitudinal ribs pass through the first through hole of the mold; The gaps between the hole in the mold and the U-shaped rib and the first longitudinal rib are sealed with a sealant. Grout is injected into the mold through the open end of the mold. The grout used for grouting into the mold has a 1-day compressive strength ≥ 50 MPa and a 28-day compressive strength ≥ 150 MPa. The outer surface structure of the wheel guard structure was constructed using steel formwork, and then concrete was poured. The mold includes: a four-sided structure and a plate structure that match each other; the four-sided structure includes: a first side, a second side, a third side, and a bottom surface, the first side, the second side, and the third side are connected in sequence and respectively connected to the bottom surface; the plate structure is matched with the second side; the first side and the third side have a first through hole for the first longitudinal rib to pass through; the bottom surface and the plate structure have a second through hole for the U-shaped rib to pass through.

2. The method for manufacturing the thermoplastic FRP rib wheel guard structure according to claim 1, characterized in that, The mold is made of polyvinyl chloride.

3. The method for manufacturing the thermoplastic FRP ribbed wheel guard structure according to claim 1 or 2, characterized in that, The curing agent and / or sealant includes epoxy resin materials.

4. The method for manufacturing the thermoplastic FRP ribbed wheel guard structure according to claim 1 or 2, characterized in that, The mold needs to be cured for more than one day after grouting.

5. The method for manufacturing the thermoplastic FRP ribbed wheel guard structure according to claim 1 or 2, characterized in that, The open end of the U-shaped rib is also provided with a hook for connecting with the second longitudinal rib.

6. The method for manufacturing the thermoplastic FRP rib wheel guard structure according to claim 5, characterized in that, The second longitudinal rib is fixedly connected to the U-shaped rib and / or the U-shaped rib to the rib of the panel by binding.

7. The method for manufacturing the thermoplastic FRP ribbed wheel guard structure according to claim 1 or 2, characterized in that, The spacing between adjacent U-shaped ribs is 15-30cm.

8. The method for manufacturing the thermoplastic FRP ribbed wheel guard structure according to claim 1 or 2, characterized in that, This also includes: maintaining the wheel chock structure after the steel formwork has been removed.

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