Snow and ice melting system for arch ring of through arch bridge

Abstract

The invention belongs to the field of bridge engineering, and relates to a snow melting and deicing system and a snow melting and deicing method for an arch ring of a half-through arch bridge. The snow and ice melting system for the half-through arch bridge arch ring comprises a carbon fiber heating unit arranged on the side portion of the arch bridge arch ring along the axis of the arch bridge arch ring, and a multi-mode ice and snow detection unit and an intelligent power supply device which are both arranged on the arch bridge arch ring. The intelligent power supply device is connected with the carbon fiber heating unit and the multi-mode ice and snow detection unit. The snow melting and deicing system and the snow melting and deicing method for the half-through arch bridge arch ring are high in deicing efficiency, high in safety degree, energy-saving and environment-friendly.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering, and relates to a snow-melting and ice-melting system and a snow-melting and ice-melting method for an arch ring of a mid-through arch bridge, and in particular to a snow-melting and ice-melting system and a snow-melting and ice-melting method for an arch ring of a mid-through arch bridge using carbon fiber heating. Background Art

[0002] As a long-span transportation infrastructure, mid-and-under arch bridges are prone to the formation of hanging icicles on their arch rings in cold climates due to low temperatures, rain, and snow condensation. These icicles, when melted naturally or caused by external forces, can pose a serious threat to vehicles and pedestrians passing under the bridge, as well as the safety of the bridge structure itself. In recent years, traffic accidents and casualties caused by falling icicles in the arch rings have become a key issue in winter bridge operation and maintenance. Therefore, how to achieve efficient, energy-saving, and environmentally friendly snow and ice melting in the arch rings of mid-and-under arch bridges in cold environments has become a technical challenge to be solved in the field of bridge engineering.

[0003] Currently, the common methods for melting snow and ice on the arch rings of mid- and bottom-supported arch bridges mainly include manual de-icing, chemical de-icing, and mechanical de-icing. Among them, manual de-icing involves manually knocking and removing icicles from the arch ring. However, this method is labor-intensive and has high operational risks, posing significant safety risks and maintenance costs. Chemical de-icing uses de-icing agents or anti-icing coatings to lower the freezing temperature of ice and snow. Although this method can inhibit ice formation in the short term, long-term use may cause corrosive damage to the bridge structure and surrounding environment, affecting the durability of the bridge and the ecological environment. Mechanical de-icing uses mechanical methods such as high-pressure water flow, shock waves, and scraping devices to forcibly remove ice. Although this method can improve removal efficiency, the equipment investment cost is high and there is a risk of damage to the arch ring, making it unsuitable for large-scale promotion and application.

[0004] In summary, existing snow and ice melting technologies for arch rings of mid-through arch bridges have limitations such as low efficiency, high cost, environmental issues or safety hazards, and cannot meet the actual needs of safe bridge operation. Summary of the Invention

[0005] In order to solve the above technical problems existing in the background technology, the present invention provides a snow-melting and ice-melting system and snow-melting and ice-melting method for the arch ring of a mid-through arch bridge with high deicing efficiency, high safety, energy saving and environmental protection.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A snow-melting and ice-melting system for the arch ring of a mid-and-low-supported arch bridge is characterized in that: the snow-melting and ice-melting system for the arch ring of a mid-and-low-supported arch bridge comprises a carbon fiber heating unit arranged on the side of the arch ring along the axis of the arch ring, and a multimodal ice and snow detection unit and an intelligent power supply device both arranged on the arch ring; the intelligent power supply device is respectively connected to the carbon fiber heating unit and the multimodal ice and snow detection unit.

[0008] Preferably, the carbon fiber heating unit includes a first carbon fiber heating unit and a second carbon fiber heating unit, and the first carbon fiber heating unit and the second carbon fiber heating unit are symmetrically arranged on both sides of the arch ring along the axis of the arch ring.

[0009] Preferably, the structure of the first carbon fiber heating unit is exactly the same as that of the second carbon fiber heating unit. The first carbon fiber heating unit is composed of at least two groups of U-shaped carbon fiber heating wires in parallel, and the carbon fiber heating wires are arranged on the arch ring in a nonlinear spacing manner from the arch soffit area to the arch back area of the arch ring.

[0010] Preferably, the density of the carbon fiber heating wires placed in the soffit area of the arch ring of the arch bridge is greater than the density of the carbon fiber heating wires placed in the dorsal area of the arch ring of the arch bridge.

[0011] Preferably, the carbon fiber heating wire includes a 48K carbon fiber tow, a polytetrafluoroethylene insulation layer, a heat-resistant polyethylene protective layer and a stainless steel braided mesh reinforcement layer, which are sequentially sheathed together from the inside to the outside.

[0012] Preferably, the carbon fiber heating units are one or more groups; when there are multiple groups of carbon fiber heating units, the multiple groups of carbon fiber heating units are sequentially arranged along the circumference of the arch ring of the arch bridge.

[0013] Preferably, the multimodal ice and snow detection unit includes a temperature and humidity sensor and an ice thickness sensor; the temperature and humidity sensor is arranged at the upper edge monitoring point of the arch ring of the arch bridge, and the upper edge monitoring point is located in the area with the maximum curvature radius of the arch crown section; the ice thickness sensor is arranged at the middle monitoring point of the arch ring of the arch bridge, and the middle monitoring point is located at the midpoint height of the arch ring of the arch bridge.

[0014] Preferably, the temperature and humidity sensor and the ice thickness sensor are both arranged in a dual-redundant symmetrical manner.

[0015] Preferably, the intelligent power supply device includes a control box, a power supply, a power cord and a programmable logic controller; the power supply and the programmable logic controller are both placed in the control box; the programmable logic controller is respectively connected to the temperature and humidity sensor, the ice thickness sensor and the power supply; the power supply is connected to the carbon fiber heating unit via a power cord; the control box is placed at the arch foot of the arch ring of the arch bridge.

[0016] A method for melting snow and ice for a through arch bridge ring based on the above-mentioned snow and ice melting system for a through arch bridge ring is characterized in that the method for melting snow and ice for a through arch bridge ring comprises the following steps:

[0017] 1) Tie the main reinforcement of the arch ring of the arch bridge;

[0018] 2) Carbon fiber heating units are arranged on the side of the main steel bars along the axis of the arch ring, from the soffit area to the arch back area of the arch ring, ensuring that the carbon fiber heating wires used in the carbon fiber heating units are arranged in a non-linear spacing manner;

[0019] 3) Connecting the carbon fiber heating unit to the intelligent power supply device to form the arch ring of the arch bridge according to conventional processes;

[0020] 4) Install a temperature and humidity sensor at the upper edge of the arch ring, and an ice thickness sensor at the middle of the arch ring. Connect the temperature and humidity sensor and the ice thickness sensor to the intelligent power supply device and send the collected real-time data to the intelligent power supply device.

[0021] 5) The intelligent power supply device regulates the carbon fiber heating wires through the power lines based on real-time data, completing the snow and ice melting of the arch ring of the through-arch bridge;

[0022] Preferably, the specific implementation method of the regulation in step 5) is:

[0023] When the ice thickness sensor detects that the ice thickness exceeds 3mm or the temperature and humidity sensor detects that the ambient temperature is below 0℃ and the relative humidity is above 80%, the programmable logic controller performs gradient heating on the carbon fiber heating wire through the power line;

[0024] When the ice thickness sensor detects that there is no ice layer thickness and the temperature and humidity sensor detects that the ambient temperature is higher than 5°C, the programmable logic controller turns off the power supply;

[0025] Along the arch ring axis, when the thickness of snow on one side of the arch ring is ≥3mm, the programmable logic controller uses the power line to gradiently heat the carbon fiber heating wire on the side of the arch ring with snow;

[0026] When local snow accumulation is detected along the circumference of the arch ring of the arch bridge, the programmable logic controller uses the power line to gradiently heat the carbon fiber heating wires in the arch ring part with snow.

[0027] The advantages of the present invention are:

[0028] This invention aims to address the safety hazards of ice falling from the arch rings of arch bridges in cold climates, as well as the resulting structural load-bearing issues. By organically integrating a carbon fiber heating unit, a multimodal ice and snow detection unit, and an intelligent power supply device into the arch ring, a modular snow and ice melting system with gradient heating and intelligent control is formed. This system achieves efficient de-icing, preventative ice melting, and optimized energy utilization, significantly meeting the safety, energy efficiency, and long-term stability requirements of arch bridge projects in cold regions. This efficient, safe, energy-saving, and environmentally friendly snow and ice melting technology for the arch rings of mid-through arch bridges improves winter operational safety and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the use status of the snow-melting and ice-melting system for the arch ring of a through-type arch bridge provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the three-dimensional layout of the carbon fiber heating unit used in the present invention;

[0031] Figure 3 Schematic diagram of the structure of the carbon fiber heating module used in the present invention;

[0032] Figure 4 This is a partial structural diagram of the carbon fiber heating unit used in the present invention;

[0033] Figure 5 It is a cross-sectional view of the arch structure;

[0034] Figure 6 It is a control flow chart of the intelligent power supply device;

[0035] Among them: 1-arch ring; 2-arch seat; 3-upper edge monitoring point; 4-middle monitoring point; 5-ice thickness sensor; 6-temperature and humidity sensor; 7-control box; 8-carbon fiber heating wire; 9-power cord; 10-T-shaped connector plug-in; 11-top and bottom plates; 12-web plate. DETAILED DESCRIPTION

[0036] See also Figure 1 The present invention provides a snow and ice melting system for the arch ring of a mid-through arch bridge. The system comprises a carbon fiber heating unit positioned along the arch ring axis, a multimodal ice and snow detection unit, and an intelligent power supply connected to the carbon fiber heating unit and the multimodal ice and snow detection unit. The technical solution provided by the present invention primarily addresses the need to prevent ice from falling from the arch structure of a mid-through arch bridge in cold climates. Through thermodynamic optimization, the system achieves intelligent ice melting protection for the arch ring and its ancillary structures.

[0037] See also Figure 2The carbon fiber heating unit includes a first carbon fiber heating unit and a second carbon fiber heating unit. The first carbon fiber heating unit and the second carbon fiber heating unit are symmetrically arranged on both sides of the arch ring along the axis of the arch ring. For example, the structure of the first carbon fiber heating unit is exactly the same as that of the second carbon fiber heating unit. The first carbon fiber heating unit is composed of at least two groups of U-shaped carbon fiber heating wires 8 arranged in parallel. Figure 5 The carbon fiber heating wires 8 are arranged in a nonlinear spacing pattern from the soffit to the transverse region of the arch ring. The density of the carbon fiber heating wires 8 in the soffit region is greater than that in the transverse region. The nonlinear spacing design of the carbon fiber heating wires 8 increases gradually from the soffit to the transverse region, creating a high-density heat field in the soffit region to effectively combat snow and ice accumulation, while achieving preventative ice melting in the transverse region.

[0038] This carbon fiber heating cable (CFHC), specifically designed for the arch rings of mid-span arch bridges, is a multi-layer composite functional material consisting of a carbon fiber reinforced matrix and a protective layer. From the inside out, the following components are present: a core layer of 48K carbon fiber tow, an insulating layer of polytetrafluoroethylene (PTFE), a protective layer of heat-resistant polyethylene (PE-RT), and a stainless steel braided mesh reinforcement layer. The finished carbon fiber heating cable is 14 meters long, contains 48K fiber tows, and has a resistance of 8.57Ω·m. -1 . Compared with ordinary cables, carbon fiber heating wires have higher strength, fatigue resistance, high temperature resistance, wear resistance, and corrosion resistance. At the same time, they have excellent electrical and thermal conductivity, can reach the set temperature in a short time, and maintain long-term stable operation. At the same time, they are weather-resistant and adaptable to extreme cold climate environments, and can meet the requirements of built-in materials in a variety of special environments. When the carbon fiber heating wire 8 is working, its temperature rise distribution causes the power difference between the upper edge area and the lower edge area to cause a temperature difference effect, thereby forming a reverse bending moment. The direction of this bending moment is opposite to the bending moment caused by ice and snow loads, so that the two offset each other, thereby reducing the load impact of the bridge structure. When the carbon fiber heating wire 8 is working, the arch ring 1 is subject to a fixed boundary constraint at the arch seat 2, which limits its radial displacement, so that the thermal expansion is mainly manifested as an axial pressure increment. At the same time, the curvature effect of the arch axis converts the radial expansion component into axial pressure, thereby reducing the generation of lateral bending moment and improving the overall stability of the structure.

[0039] See also Figure 3 The carbon fiber heating unit is one or more groups; when there are multiple groups of carbon fiber heating units, the multiple groups of carbon fiber heating units are sequentially arranged along the circumference of the arch ring of the arch bridge. When there are multiple groups of carbon fiber heating units, they can directly constitute a carbon fiber heating module. For example, in Figure 3The carbon fiber heating module is composed of three groups of carbon fiber heating units. These units are arranged symmetrically along the arch's centerline, each covering a 7-meter arc length around the arch's center. Three units are combined to form a heating module with a total length of 21 meters. This modular design facilitates segmented and gradient heating control, ensuring heating requirements for different areas. Furthermore, by employing nonlinear wiring technology, the wiring spacing increases gradually from the soffit to the transverse arch, creating a high-density thermal field in the soffit to effectively address the risks of snow and ice accumulation and icefall. In the transverse arch, thermal convection provides preventative ice melting.

[0040] Please continue to see Figure 1 The multimodal ice and snow detection unit used in the present invention includes a temperature and humidity sensor 6 and an ice thickness sensor 5; the temperature and humidity sensor 6 is set at the upper edge monitoring point 3 of the arch ring of the arch bridge, and the upper edge monitoring point 3 is located in the area with the maximum curvature radius of the arch section. Due to the gentle curvature of this area, the probability of snow accumulation is higher than other areas; the ice thickness sensor 5 is set at the middle monitoring point 4 of the arch ring of the arch bridge, and the middle monitoring point 4 is located at the midpoint height of the arch ring of the arch bridge, which is used to monitor the thermal field gradient. The temperature and humidity sensor 6 and the ice thickness sensor 5 are both set in a dual-redundant symmetrical manner. The multimodal ice and snow detection unit can monitor the ice and snow status and microclimate conditions on the surface of the arch ring in real time and accurately, providing timely and reliable data support for the intelligent power supply device, and ensuring that the system can respond quickly when the ice and snow accumulation reaches the warning threshold.

[0041] The intelligent power supply device includes a control box 7, a power supply, a power cord 9, and a programmable logic controller; the power supply and the programmable logic controller are both placed in the control box 7; the programmable logic controller is respectively connected to the temperature and humidity sensor 6, the ice thickness sensor 5, and the power supply; the power supply is connected to the carbon fiber heating unit via the power cord 9; the control box 7 is placed at the arch foot of the arch ring of the arch bridge. The intelligent power supply device adopts a modular design and is combined with a multi-modal ice and snow detection unit to achieve segmented and single-sided automatic start and stop control of each heating module. To ensure the safety and stability of power transmission, all power supply interfaces use a high-protection-grade T-shaped connector plug-in 10 and an armored power supply cable to ensure the safe connection of the 220V AC live wire, neutral wire, and ground wire. See Figure 4 , is a partial structural diagram of the carbon fiber heating unit used in the present invention, that is, the power line 9 is connected to the U-shaped carbon fiber heating line 8 through a T-shaped connector plug-in 10.

[0042] The present invention provides a snow-melting and ice-degrading system for the arch ring of a through-arch bridge as described above, and also provides a snow-melting and ice-degrading method for the arch ring of a through-arch bridge based on the system. The snow-melting and ice-degrading method comprises the following steps:

[0043] 1) Tie the main reinforcement of the arch ring of the arch bridge;

[0044] 2) The carbon fiber heating unit is arranged on the side of the main steel bar along the axis of the arch ring, from the soffit area to the arch back area of the arch ring, ensuring that the carbon fiber heating wires 8 used in the carbon fiber heating unit are arranged in a non-linear manner;

[0045] 3) Connecting the carbon fiber heating unit to the intelligent power supply device to form the arch ring of the arch bridge according to conventional processes;

[0046] 4) Install a temperature and humidity sensor 6 at monitoring point 3 on the upper edge of the arch ring, and an ice thickness sensor 5 at monitoring point 4 in the middle of the arch ring. Connect the temperature and humidity sensor 6 and the ice thickness sensor 5 to the intelligent power supply device, and send the collected real-time data to the intelligent power supply device.

[0047] 5) The intelligent power supply device regulates the carbon fiber heating wire 8 through the power line 9 according to real-time data, thereby completing the snow and ice melting of the arch ring of the through-type arch bridge.

[0048] For example, see Figure 6 The specific implementation of the control in step 5) is as follows: when the ice thickness sensor 5 detects an ice thickness exceeding 3mm or the temperature and humidity sensor 6 detects an ambient temperature below 0°C and a relative humidity above 80%, the programmable logic controller (PLC) performs gradient heating on the carbon fiber heating wires 8 via the power cord 9. When the ice thickness sensor 5 detects no ice thickness and the temperature and humidity sensor 6 detects an ambient temperature above 5°C, the PLC shuts off the power supply to ensure efficient ice melting and optimize energy utilization, thereby effectively avoiding unnecessary energy waste. Along the arch ring axis, when the snow depth on one side of the arch ring is ≥3mm, the PLC performs gradient heating on the carbon fiber heating wires 8 on the side of the arch ring with snow via the power cord 9, which is more energy-efficient than the full-power mode on both sides. Along the circumference of the arch ring, when localized snow accumulation is detected, the PLC performs gradient heating on the carbon fiber heating wires 8 in the area of the arch ring with snow via the power cord 9. For example, when the central monitoring point detects snow accumulation, the system automatically activates the heating module in the middle area of arch ring 1. Conversely, when the upper edge monitoring point detects snow accumulation, the heating module in the upper area is activated, thus achieving on-demand, zoned heating. This solution's advantage lies in its spatial adaptability: optimized point placement tailored to the arch's curvature enhances snow detection sensitivity. It also optimizes energy efficiency, with independent control of each zone reducing inefficient energy consumption and improving the system's overall energy efficiency.

[0049] Exemplary installation of the carbon fiber heating unit is as follows: After the main reinforcement of the bridge arch ring 1 is tied, the distributed carbon fiber heating units are first fixedly installed in the steel mesh on both sides of the cross section of the arch ring 1 using a progressive layout method along the longitudinal axis of the arch ring 1. At this time, each carbon fiber heating unit is embedded in the concrete protective layer, thereby meeting the long-term weather resistance and mechanical protection requirements. The power line 9 is then rationally laid out along the lower edge of the arch ring 1 and connected to the intelligent power supply device to ensure the stability of signal transmission and power supply. During the specific layout process, the carbon fiber heating units are installed along the central axis of the arch ring 1 on the bridge deck, with a standard unit set every 7 meters of arc length. Three consecutive standard units (a total of 21 meters) are combined into a heating module, which adopts a modular management strategy to achieve segmented, gradient heating control of each local area. The above construction method clearly describes the technical features and implementation process of the present invention, effectively realizing the layout of the carbon fiber heated mid-under arch bridge arch ring snow and ice melting system. The present invention is technically efficient and energy-saving, has a simple construction process, can adapt to cold climatic conditions, and significantly improves the reliability and economy of the arch bridge arch ring ice melting system.

[0050] For example, the construction data for a concrete arch ring-type half-through arch bridge is as follows: the bridge has a span of 300 meters, a rise of 50 meters, and a rise-to-span ratio of 1 / 6. The cross-sectional dimensions of the arch ring 1 are: 8.5 meters wide, 4.2 meters high, the top and bottom plates 11 are 0.5 meters thick (outer steel plate + inner C60 concrete), and the web 12 is 0.6 meters thick (Q420 steel web).

[0051] The distributed carbon fiber heating unit of the present invention is equipped with four groups of carbon fiber heating cables 8 with a length of 14m. Each heating unit adopts a U-shaped folded parallel topology to optimize the circuit connection method and improve power supply stability and system reliability. The heating area of a single distributed carbon fiber heating unit is 7m long and 4.2m wide. Its horizontal arrangement spacing follows a progressive distribution pattern of 50-100-200cm, focusing on heating the lower edge of the arch while taking into account the ice melting at the upper edge of the arch. This nonlinear spacing design uses a heating cable spacing of 50cm near the lower edge, forming a high-density heat field in this area with severe ice formation, effectively addressing the gravity accumulation effect of the ice layer; while the heating cable spacing is 200cm in the upper area, where there is less ice, which can take into account the ice melting effect and energy saving. The upper carbon fiber heating cable 8 is arranged in the area near the upper edge of the arch 1, which can effectively prevent ice from forming in this area and optimize the ice melting effect.

[0052] The intelligent power supply device of the present invention adopts a modular design, and standardized heating modules are arranged at an arc length interval of 21m along the central axis of the arch ring 1 on the bridge deck, thereby realizing efficient multi-section linkage control. Each group of heating modules is composed of three heating units, which are connected in parallel through the main power line 9. Each heating unit is connected in parallel through the power line and four groups of carbon fiber heating lines 8. The heating coverage range of each unit is 7m, so that the overall heating area of each group of modules is up to 21m long and 4.2m wide. For example, in an application scenario where the arc length of the central axis of the arch ring 1 on the bridge deck is 252m, this area can be evenly divided into 12 heating modules, which are controlled by 12 main power lines. These 12 power lines 9 are uniformly connected to the control box 7, and each heating module is controlled by the control box 7. These modules are evenly arranged along the central axis of the arch ring 1. Specifically, the first 6 modules are respectively arranged on both sides of the lower part of the arch ring 1, and the last 6 modules are arranged in the upper area of the arch ring 1. By employing differentiated control strategies for the upper and lower modules, the system achieves gradient heating of the arch structure, significantly improving snow removal efficiency, reducing energy consumption, and ensuring long-term stable operation while ensuring structural safety and reliability. Furthermore, each power supply interface module is equipped with a high-protection T-shaped connector plug-in 10, ensuring a secure and reliable connection of the 220V AC live, neutral, and ground wires in the carbon fiber heating cable. These technical measures collectively enhance the operational stability and safety performance of the entire system under complex operating conditions.

[0053] The present invention realizes gradient heating and intelligent control in the arch ring structure through the above technical solution, which has the following advantages:

[0054] 1) Efficient de-icing and preventive ice melting: The high-density thermal field formed by nonlinear wiring can effectively eliminate the risk of ice falling caused by ice and snow accumulation in the arch area. At the same time, preventive ice melting measures in the arch area can prevent the initial accumulation of ice and snow.

[0055] 2) Energy utilization optimization: The intelligent power supply device can start and stop the power supply on one side or in sections according to real-time detection data, thereby significantly reducing energy consumption and improving the overall energy efficiency of the system while meeting safety requirements.

[0056] 3) Simple construction process and high reliability: The carbon fiber heating unit adopts a modular design. During installation, it is fixed in the arch ring steel mesh and embedded in the concrete protective layer, which not only ensures long-term weather resistance but also facilitates construction and maintenance. At the same time, high protection measures are taken for each key electrical connection to ensure the safe and reliable operation of the system in complex environments.

[0057] 4) Intelligent monitoring and control: The collaborative work of the multimodal ice and snow detection unit and the intelligent power supply device enables real-time monitoring and precise regulation of the ice and snow status of the arch bridge structure, ensuring that the ice melting strategy can achieve the desired effect in different areas and reducing the risk of the structure being affected by ice and snow loads.

[0058] In summary, the present invention's arch ring snow and ice melting system for mid-through arch bridges, through its scientific wiring design and intelligent control strategy, comprehensively improves the ice melting effect and energy efficiency of arch bridges, demonstrating its high technical application value and promising prospects for widespread adoption. This system is applicable to the ice-fall prevention and safety requirements of various arch bridge projects in cold regions. Its technical solution, implementation method, and optimized structure constitute the key innovations of this invention. Its scope of protection should not be limited to the specific implementation methods described above but should encompass all equivalent improvements within the spirit and principles of this invention.

Claims

1. A snow and ice melting system for the arch ring of a mid-through arch bridge, characterized by: The snow-melting and ice-melting system for the arch ring of a mid-and-bottom-supported arch bridge includes a carbon fiber heating unit arranged on the side of the arch ring along the axis of the arch ring, and a multimodal ice and snow detection unit and an intelligent power supply device both arranged on the arch ring; the intelligent power supply device is respectively connected to the carbon fiber heating unit and the multimodal ice and snow detection unit.

2. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 1, characterized in that: The carbon fiber heating unit includes a first carbon fiber heating unit and a second carbon fiber heating unit, and the first carbon fiber heating unit and the second carbon fiber heating unit are symmetrically arranged on both sides of the arch ring along the axis of the arch ring.

3. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 2, characterized in that: The structure of the first carbon fiber heating unit is completely identical to that of the second carbon fiber heating unit. The first carbon fiber heating unit is formed by at least two groups of U-shaped carbon fiber heating wires (8) arranged in parallel, and arranged along the direction from the arch soffit area to the arch back area of the arch ring of the arch bridge. The carbon fiber heating wires (8) are arranged on the arch ring of the arch bridge in a non-linear spacing manner.

4. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 3, characterized in that: The density of the carbon fiber heating wires (8) placed in the soffit area of the arch ring of the arch bridge is greater than the density of the carbon fiber heating wires (8) placed in the back area of the arch ring of the arch bridge.

5. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 4, characterized in that: The carbon fiber heating wire (8) comprises a 48K carbon fiber bundle, a polytetrafluoroethylene insulation layer, a heat-resistant polyethylene protective layer, and a stainless steel braided mesh reinforcement layer, which are sequentially sheathed together from the inside to the outside.

6. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 5, characterized in that: The carbon fiber heating units are in one or more groups; when there are multiple groups of carbon fiber heating units, the multiple groups of carbon fiber heating units are sequentially arranged along the circumference of the arch ring of the arch bridge.

7. The snow and ice melting system for the arch ring of a mid-through arch bridge according to any one of claims 1 to 6, characterized in that: The multimodal ice and snow detection unit comprises a temperature and humidity sensor (6) and an ice thickness sensor (5); the temperature and humidity sensor (6) is arranged at an upper edge monitoring point (3) of the arch ring of the arch bridge, and the upper edge monitoring point (3) is located in the region of maximum curvature radius of the arch crown section; the ice thickness sensor (5) is arranged at a middle monitoring point (4) of the arch ring of the arch bridge, and the middle monitoring point (4) is located at the midpoint height of the arch ring of the arch bridge.

8. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 7, characterized in that: The temperature and humidity sensor (6) and the ice thickness sensor (5) are both arranged in a dual-redundant symmetrical manner.

9. The snow and ice melting system for the arch ring of a mid-through arch bridge according to claim 8, characterized in that: The intelligent power supply device comprises a control box (7), a power supply, a power line (9) and a programmable logic controller; the power supply and the programmable logic controller are both placed in the control box (7); the programmable logic controller is respectively connected to a temperature and humidity sensor (6), an ice thickness sensor (5) and the power supply; the power supply is connected to a carbon fiber heating unit via a power line (9); and the control box (7) is placed at the arch foot of the arch ring of the arch bridge.

10. A method for melting snow and ice for a through arch bridge ring based on the snow and ice melting system for a through arch bridge ring according to claim 9, characterized in that: The snow-melting and ice-melting method for the arch ring of a mid-through arch bridge comprises the following steps: 1) Tie the main reinforcement of the arch ring of the arch bridge; 2) Arrange the carbon fiber heating unit on the side of the main reinforcement along the axis of the arch ring of the arch bridge, and ensure that the carbon fiber heating wire (8) used in the carbon fiber heating unit is arranged in a non-linear spacing manner along the direction from the arch area to the arch back area of the arch ring of the arch bridge; 3) Connect the carbon fiber heating unit to the intelligent power supply device and form the arch ring of the arch bridge according to conventional technology; 4) A temperature and humidity sensor (6) is provided at a monitoring point (3) at the upper edge of the arch ring of the arch bridge, and an ice thickness sensor (5) is provided at a monitoring point (4) in the middle of the arch ring of the arch bridge. The temperature and humidity sensor (6) and the ice thickness sensor (5) are connected to an intelligent power supply device and the collected real-time data are sent to the intelligent power supply device. 5) The intelligent power supply device regulates the carbon fiber heating wire (8) through the power line (9) according to the real-time data, thereby completing the snow and ice melting of the arch ring of the center-supported arch bridge; Preferably, the specific implementation method of the regulation in step 5) is: When the ice thickness sensor (5) detects that the ice thickness exceeds 3 mm or the temperature and humidity sensor (6) detects that the ambient temperature is lower than 0°C and the relative humidity is higher than 80%, the programmable logic controller performs gradient heating on the carbon fiber heating wire (8) through the power line (9); When the ice thickness sensor (5) detects that there is no ice thickness and the temperature and humidity sensor (6) detects that the ambient temperature is higher than 5°C, the programmable logic controller turns off the power supply; Along the axis of the arch ring, when the thickness of snow on one side of the arch ring is ≥3 mm, the programmable logic controller performs gradient heating on the carbon fiber heating wire (8) on the side of the arch ring with snow through the power line (9); When local snow accumulation is detected along the circumference of the arch ring of the arch bridge, the programmable logic controller performs gradient heating on the carbon fiber heating wire (8) at the arch ring portion where snow has accumulated through the power line (9).

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