A road construction method with snow melting and ice thawing functions

Abstract

The present invention discloses a road construction method with a snow melting and ice thawing function, which adopts a modular self-heating snow melting and ice thawing device. During construction, the most easily frozen position is selected as the installation point. According to the design elevation, size and shape of the self-heating snow melting and ice thawing device, a mold is installed in the working space, and then subgrade construction is carried out around the mold; then heat diffusion pipes are preset on the subgrade, and heat diffusion pipe joints are reserved, and pavement construction is continued around the mold; after the pavement construction is completed, the mold is removed to form an installation hole, and the self-heating snow melting and ice thawing device is installed in the installation hole, and the snow melting and ice thawing pipeline module is connected to the surrounding heat diffusion pipe joints to complete the road construction. The present invention adopts a self-heating snow melting and ice thawing device, so that the present invention can realize snow melting and ice thawing of the road surface without a high-power heating power supply, which is safe, efficient and low-cost. The present invention adopts modular installation, so that the maintenance cost of the present invention is low, and it has practical engineering application significance.

Description

Technical Field

[0001] The present invention belongs to the field of safe operation of road and bridge, and relates to a road and bridge snow melting and ice melting technology, in particular to a road construction method with snow melting and ice melting functions. Background Art

[0002] Most areas in China are in snowfall areas. Especially in the early winter and early spring seasons, the problem of ice and snow accumulation on the bridge deck is very common. Due to the changes in temperature and vehicle load, thin ice layers are likely to form on the road and bridge surface. When the road surface freezes, the adhesion coefficient decreases rapidly, the bonding force decreases significantly, and the braking stability of the vehicle decreases significantly, often resulting in vehicle braking failure, loss of direction control, and even skidding. At the same time, the braking distance is significantly extended, leading to frequent traffic accidents.

[0003] At present, the widely used snow and ice melting technologies are the deicing agent method and the mechanical deicing method. The deicing agent method is a commonly used ice melting method in most countries. However, it has negative impacts on the surrounding environment, existing buildings, and green vegetation. The main component of the commonly used deicing agent is chloride, and the chloride solution formed after snow melting is highly corrosive to the road surface structure (steel bars, concrete, asphalt, etc.), seriously affecting the durability and safety of road and bridge structures. Mechanical deicing is a method to eliminate the hazards of ice and snow crisis through the direct action of ice and snow machinery. However, in the specific construction process, it is usually restricted by road conditions, thin snow layers, temperature and other conditions. It is extremely difficult to remove snow and ice on different roads with machines. At the same time, traditional mechanical snow removal will affect traffic and damage the road surface, and the maintenance cost is high in the later stage. In addition, the electric heating method for snow and ice melting technology currently under research and promotion is still in the R & D stage. Compared with the mechanical snow and ice removal methods, although the electric heating snow and ice removal technology is an efficient road surface snow removal method, the cost is relatively high. Once the snow melting system fails, it is inconvenient to repair. In addition, for existing roads and bridges, closed construction is required, which affects traffic. Therefore, there is an urgent need for a safe snow melting and ice melting technology with relatively low usage cost and maintenance cost to achieve real application in engineering. Summary of the Invention

[0004] The purpose of the present invention is to provide a road construction method with snow melting and ice melting functions, which does not require a high-power external power supply, is simple in construction, and convenient for maintenance and repair, and solves the deficiencies in the prior art such as corrosion, inconvenient installation and repair, and high cost.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A road construction method with snow melting and ice melting functions, in which a self-heating snow melting and ice melting device is installed on the road. The self-heating snow melting and ice melting device includes a heating pack module, a snow melting and ice melting pipeline module, a water storage tank module, and a water collection tank module;

[0007] The heating pack module includes a number of self-heating packs, and each self-heating pack is provided with self-heating materials that react with water.

[0008] The snow melting and ice thawing pipeline module is connected to each self-heating pack through a heat pipeline, and the heat generated in the self-heating pack is introduced into the road surface to melt snow and ice.

[0009] The water storage tank module is used to store and provide the initial water for starting the self-heating pack.

[0010] The water collection tank module is used to collect the water generated after the snow on the road surface melts and thaws, and return this water to the heating pack module through a pipeline to achieve recycling; The road construction method includes the following steps:

[0011] Step 1: According to on-site survey, select the most easily frozen location as the installation point of the self-heating snow melting and ice thawing device, dig a pit at the installation point to form a working space, and install a mold for forming an installation hole in the working space according to the design elevation, size and shape of the self-heating snow melting and ice thawing device. Then, carry out subgrade construction around the mold until the subgrade reaches the same position as the top of the heating box body.

[0012] Step 2: Preset heat diffusion pipes on the subgrade around the mold, and reserve heat diffusion pipe joints. Continue to carry out subgrade or road surface construction around the mold until the road surface design elevation is reached.

[0013] Step 3: Remove the mold to form an installation hole, install the self-heating snow melting and ice thawing device in the installation hole, and connect the snow melting and ice thawing pipeline module to the surrounding heat diffusion pipe joints to complete the road construction.

[0014] When the ground temperature reaches the freezing point, the water in the water storage tank module is injected into the self-heating pack to react and form steam and hot air. The steam reaches the road surface layer through the heat pipeline, exchanges heat with the surrounding environment, causes the road surface temperature to rise, melts the ice and snow. The melted water is collected by the water collection tank module above the device, and the recycled water is used to replenish the water source required for the reaction of the heating pack in the device. When the road surface temperature rises above the freezing point, the heating device stops working, achieving the purpose of snow melting and ice removal.

[0015] The present invention has the following advantages and effects compared with the prior art:

[0016] The present invention adopts modular hoisting construction. Except for adding a simple mold, it does not change the road construction process in the prior art. During the later maintenance process, it can also be replaced as a whole by hoisting. The failed or malfunctioning self-heating snow melting and ice thawing device can be sent to the factory for centralized repair or disposal, which is convenient and fast, and can reduce the impact on road traffic to the lowest level.

[0017] The present invention uses a chemical reaction between water supply and a heating material to supply heat, eliminating the need for long-term DC power supply. Only a control power source is required, and a battery can be used to maintain long-term operation, without being restricted by inconvenient power supply in remote areas. Compared with traditional mechanical de-icing devices, it does not require a large amount of manpower and machinery, does not affect road traffic, and has less impact on the road structure. Compared with the electrothermal method, it is convenient for installation and maintenance, does not require long-term power supply, has good practical popularization, good economic benefits, and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the installation and distribution of the self-heating snow melting and ice melting device of the present invention on a road.

[0019] Figure 2 Schematic diagram of the completion in Step 1 of the road construction method of the embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the installation of the heat diffusion pipe in Step 2 of the road construction method of the embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the road surface pouring in Step 2 of the road construction method of the embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the pouring after the mold is removed in Step 3 of the road construction method of the embodiment of the present invention.

[0023] Figure 6 Schematic diagram of the completion of the installation of the self-heating snow melting and ice melting device in Step 3 of the road construction method of the embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the structure of a single self-heating snow melting and ice melting device in the embodiment of the present invention.

[0025] Figure 8 Schematic diagram of the snow melting and ice melting pipeline module of the present invention.

[0026] Figure 9 Schematic diagram of the structure of a single self-heating package of the present invention.

[0027] Figure 10 Schematic diagram of the structure of the water collection tank module of the present invention.

[0028] Figure 11 Schematic diagram of the structure of the water storage tank module of the present invention.

[0029] Figure 12 Schematic diagram of the in-use state of the second self-heating package.

[0030] 1 - Self - heating snow - melting and ice - thawing device, 2 - Road surface, 3 - Installation point, 4 - Roadbed, 5 - Mold, 6 - Heat diffusion pipe, 61 - Main heat diffusion pipe, 62 - Branch heat diffusion pipe, 63 - Pipe joint, 7 - Operation gap, 8 - Installation hole; 100 - Modular box structure, 110 - Cover plate, 120 - Heating box body, 200 - Heating pack module, 210 - Self - heating pack, 211 - Water storage container, 212 - Heating pack, 213 - Self - heating material, 214 - Water inlet, 215 - Heat outlet, 216 - Float control valve, 220 - Control water tank, 221 - Top inlet, 222 - Liquid level gauge, 230 - Control valve; 300 - Snow - melting and ice - thawing pipeline module, 310 - Heat exchange pipeline, 311 - Main heat exchange pipe, 312 - Branch heat exchange pipe, 320 - Heat collection pipeline, 400 - Water storage tank module, 410 - Water storage tank, 420 - Water supply control valve, 500 - Water collection tank module, 510 - Water collection pipe, 511 - Main water collection pipe, 512 - Branch water collection pipe, 513 - Outlet pipe, 520 - Water collection tank, 521 - Water storage area, 522 - First - stage grit chamber, 523 - Second - stage grit chamber, 524 - Large - mesh filter, 525 - Medium - mesh filter, 526 - Small - mesh filter, 527 - Baffle, 528 - Make - up water valve, 529 - Circulating water valve, 530 - Water collection inclined plate, 600 - Control module, 700 - Monitoring module. Detailed implementation mode

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following is only an example of the technical solution of the present invention and does not represent the scope of all technical solutions of the present invention. In addition, for the nouns used in the embodiments, if there are clear definitions, they shall be subject to their definitions; if there are no clear definitions, they shall be subject to the general industry interpretations. For the structures or steps not mentioned in the following embodiments, they are all existing and mature technologies.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] As Figures 1 to 6 shown, the present invention provides a road construction method with a snow melting and ice thawing function. An self-heating snow melting and ice thawing device 1 is installed on the road. The self-heating snow melting and ice thawing device 1 includes a heating pack module 200, a snow melting and ice thawing pipeline module 300, a water storage tank module 400, and a water collection tank module 500. The present invention adopts a dot matrix installation method, that is, the road with snow melting and ice thawing requirements is divided into grids, and an self-heating snow melting and ice thawing device 1 is set at every other grid. Each self-heating snow melting and ice thawing device 1 can basically radiate about half of the surrounding blank grids, so as to realize snow melting and ice thawing for the entire road.

[0035] The road construction method includes the following steps:

[0036] Step 1: As Figure 1 shown, according to the on-site survey, select the most easily frozen position as the installation point 3 of the self-heating snow melting and ice thawing device 1. Dig a pit at the installation point 3 to form an operation space. According to the design elevation, size and shape of the self-heating snow melting and ice thawing device 1, install a mold 5 for forming an installation hole 8 in the operation space, and then carry out subgrade 4 construction around the mold 5 until the subgrade 4 is constructed to the same position as the top of the heating box body. The result is as Figure 2 shown;

[0037] Step 2: Preset heat diffusion pipes 6 on the subgrade 4 around the mold 5, and reserve heat diffusion pipe joints 63, as Figure 3 shown; Continue to carry out subgrade 4 or pavement 2 construction around the mold 5 until the design elevation of the pavement 2, as Figure 4 shown;

[0038] Step 3: Remove the mold 5 to form an installation hole 8, as Figure 5 shown; Install the self-heating snow melting and ice thawing device 1 in the installation hole 8, connect the snow melting and ice thawing pipeline module to the surrounding heat diffusion pipe joints 63, and complete the road construction, as Figure 6 shown.

[0039] The present invention adopts a preset mold 5 to carry out integral construction on the self-heating snow melting and ice thawing device 1, and the later replacement and maintenance are also integral replacements, with low cost, fast maintenance speed, and the impact on traffic can be reduced to the lowest level.

[0040] In some embodiments, such as Figure 6 and Figure 7 shown, in order to reduce construction costs and improve project feasibility, the self-heating snow melting and ice melting device 1 of the present invention is modularly designed and encapsulated in the modular box structure 100. During use, only a corresponding space needs to be reserved or excavated on the road surface 2, and the modular box structure 100 can be integrally installed therein. The modular box structure 100 of the present invention includes a cover plate 110 flush with the road surface 2 and a heating box body 120 buried underground and connected to the cover plate 110. The cover plate 110 can be made of a steel structure or a concrete casting structure, and the heating box body 120 can be made of a steel structure or engineering plastic; the snow melting and ice melting pipeline module 300 is buried in the cover plate 110 for melting the ice and snow on the cover plate 110; the heating pack module 200, the water storage tank module 400, and the water collection tank module 500 are all arranged in the heating box body 120.

[0041] In some embodiments, such as Figure 6 shown, the thickness of the cover plate is the same as that of the road surface 2 layer, and the elevation after the subgrade 4 construction in step 2 is the same as the top of the heating box body. In this way, the construction of the subgrade 4 and the road surface 2 can just be layered, which helps to improve the construction speed.

[0042] In some embodiments, when the road surface 2 is constructed in step 2, such as Figure 4 shown, an operation gap 7 for connecting the heat diffusion pipe joint 63 is reserved between the cover plate and the surrounding road surface 2. After the connection between the snow melting and ice melting pipeline module and the heat diffusion pipe joint 63 is completed in step 3, the operation gap 7 is filled according to the road surface 2 layer construction method.

[0043] It should be noted that the heat diffusion pipe 6 buried in the road surface 2 layer around the mold 5 can be a closed pipeline with only an opening at the end, or a pipe body with openings. The material can be a plastic pipe, such as a PPR pipe; when the road surface 2 layer is poured with permeable concrete, the heat diffusion pipe 6 can also be a pipe body with micropores, so that the cold air or condensed water after the hot air or water vapor reaches the road surface 2 layer for snow melting and ice melting can be discharged through the micropores on the pipe and the permeable concrete.

[0044] In some embodiments, such as Figure 3As shown, the heat diffusion tube 6 includes a plurality of main heat diffusion tubes 61 and heat diffusion branch tubes 62. The main heat diffusion tubes 61 are connected to the snow melting and ice thawing pipeline module 300 through pipe joints 63, specifically connected to the end of the heat exchange main pipe 311 of the snow melting and ice thawing pipeline module 300, for transmitting hot air or steam. The heat diffusion branch tubes 62 are connected to each main heat diffusion tube 61, for further dispersing the hot air or steam in the main heat diffusion tubes 61 to melt snow and ice. Generally, if micropores are provided, most of them are provided on the heat diffusion branch tubes 62. Generally, the heat diffusion branch tubes 62 are all distributed perpendicular to the main heat diffusion tubes 61, so as to evenly transfer heat to the road surface 2.

[0045] As Figure 7 and Figure 8 shown, the present invention provides a self-heating snow melting and ice thawing device 1, including

[0046] a heating pack module 200, including a plurality of self-heating packs 210, and a self-heating material 213 that reacts with water is provided in each self-heating pack 210;

[0047] a snow melting and ice thawing pipeline module 300, which is connected to each self-heating pack 210 through a heat pipeline, and conducts the heat generated in the self-heating pack 210 to the road surface 2 to melt snow and ice;

[0048] a water storage tank module 400, for storing and providing the initial water for starting the self-heating pack 210;

[0049] a water collection tank module 500, for collecting the water generated after the snow and ice on the road surface 2 melt, and returning this water to the heating pack module 200 through a pipeline to achieve recycling.

[0050] The present invention provides the initial starting water through the water storage tank module 400. When it is judged that snow melting and ice thawing are needed through manual or other means, the water storage tank module 400 is started, and the initial starting water is injected into the heating pack module 200. After the water enters the heating pack module 200, it chemically reacts with the self-heating material 213 in the self-heating pack 210, generating a large amount of heat. The large amount of heat heats the air, and the hot air rises and enters the snow melting and ice thawing pipeline module 300 through the heat pipeline to melt snow and ice. Of course, a large amount of heat can also generate water vapor at the same time. The water vapor and the hot air carry heat and rise together, and transport the heat to the snow melting and ice thawing pipeline module 300 to melt snow and ice.

[0051] It should be noted that the specific type of the self-heating material 213 in the self-heating pack 210 is not limited and can be strong acids, strong alkalis, oxides of active metals, anhydrous salts, etc. Strong acids generally include concentrated sulfuric acid, perchloric acid, etc.; strong alkalis generally include sodium hydroxide, potassium hydroxide, etc. Oxides of active metals generally include calcium oxide, barium oxide, lithium oxide, etc. Anhydrous salts generally include anhydrous lithium chloride, anhydrous zinc chloride, etc. Of course, considering safety, cost, and operational maintainability, strong acids and strong alkalis are generally not selected. The self-heating pack 210 can generally be set as a water storage container 211, and measures such as a liquid level gauge can be set for the water storage container 211 to monitor the liquid level. The self-heating material 213 can be encapsulated with a water-permeable material and then placed in the water storage container 211. Encapsulation can improve the replacement speed after the self-heating material 213 is used up; the water-permeable material can be such as gauze, a water-permeable plastic film, etc. The water-permeable speed of the water-permeable material is selected according to the severity of the reaction between the self-heating material 213 and water. For example, if the reaction is mild, highly water-permeable materials such as gauze or mesh can be selected, and when water enters the self-heating pack 210, it can quickly come into full contact with the self-heating material 213 and react to release heat; when the reaction between the self-heating material 213 and water is very violent, materials with a low water-permeable rate such as a water-permeable plastic film can be selected, and the severity of heat release is controlled by controlling the contact speed between water and the self-heating material 213 to prevent overheating in the self-heating pack 210 in a short time, thereby causing potential safety hazards.

[0052] When the self-heating material 213 in the self-heating pack 210 is used up, all the self-heating packs 210 can be replaced as a whole, or the self-heating packs 210 can be replaced one by one, which is specifically selected according to actual needs. The replaced self-heating packs 210 are generally sent to the factory for centralized replacement of the self-heating material 213, which is lower in cost and better in safety compared with replacing the self-heating material 213 on-site; of course, in some special cases, the self-heating material 213 in the self-heating pack 210 can also be replaced on-site. At this time, the self-heating pack 210 needs to be designed as a container structure that is convenient to open on-site, which is a specific prior art and will not be elaborated in this invention.

[0053] Such as Figure 7 、 8As shown in FIGS. 9, in some embodiments, the heating pack module 200 further includes a control water tank 220. The top inlet 221 of the control water tank 220 is connected to the water storage tank module 400. A number of self-heating packs 210 are stacked from bottom to top at the inner bottom of the heating box body 120. The control water tank 220 is disposed beside the stacked self-heating packs 210. The water inlet 214 of each self-heating pack 210 is connected to the water outlet at the corresponding height provided on the control water tank 220 through a control valve 230. At the top of each self-heating pack 210 on the side away from the water inlet 214, there is a heat outlet 215. The heat outlets 215 of all the self-heating packs 210 are collected and communicated to the snow melting and ice thawing pipeline module 300 through a heat collection pipeline 320. The water inside the heating box body 120 enters the self-heating pack 210 under the control of the control valve 230, reacts with the self-heating material 213 to generate hot air or steam. The hot air or steam enters the heat collection pipeline 320 through the heat outlet 215, and after being collected by the heat collection pipeline 320, is sent to the snow melting and ice thawing pipeline module 300.

[0054] As Figure 9 shown, the self-heating pack 210 includes a water storage container 211 and a heating pack 212 disposed inside the water storage container 211. The heating pack 212 itself is made of a water-permeable material. The heating pack 212 contains a water-reacting heating material. The water inlet 214 is provided on the right side of the water storage container 211, and the heat outlet 215 is provided on the left side. The water storage container 211 itself can be made of steel material or engineering plastic.

[0055] It should be noted that the control water tank 220 generally does not need to be too large in size, but its height should generally cover all the stacked self-heating packs 210. During use, the starting water entering the control water tank 220 through the water storage tank module 400 first enters the bottommost self-heating pack 210 through the control valve 230. When the self-heating material 213 in the bottommost self-heating pack 210 has reacted and can no longer generate heat, the corresponding control valve 230 is closed, and the control valve 230 between the upper-level self-heating pack 210 and the control water tank 220 is opened to put the second self-heating pack 210 into use. Therefore, it is necessary to ensure that the height of the control water tank 220 covers all the self-heating packs 210. Since the bottommost self-heating pack 210 is started first, only a small amount of water is needed to start. As the snow melting and ice thawing progresses, a lot of water can flow back through the water collection tank module 500. Therefore, there is no need to worry about the water source problem during the subsequent snow melting and ice thawing, and basically no additional water supply from the water storage tank module 400 is required.

[0056] It should be noted that the number of self-heating packs 210 stacked in each heating box body 120 is not limited and can be selected according to actual situations. Considering complexity, 1 - 10 are all acceptable. In this embodiment, 4 self-heating packs 210 are used.

[0057] AsFigure 9 As shown, in some embodiments, a float control valve 216 is provided at each heat outlet 215 of each self-heating pack 210. When the liquid level in the self-heating pack 210 is higher than the heat outlet 215, the float control valve 216 automatically closes the heat outlet 215. The float control valve 216 is a safety measure that can prevent the water in the self-heating pack 210 from entering the heat collection pipe 320. Under normal circumstances, when the water level in the self-heating pack 210 rises to a position almost the same as the heat outlet 215, it also indicates that the self-heating material 213 in the self-heating pack 210 has failed. At this time, the control valve 230 between the corresponding self-heating pack 210 and the control water tank 220 can be closed. However, to prevent inaccurate timing judgment or error in judgment, a float valve is provided at the heat outlet 215 to ensure safety and prevent water from entering the heat collection pipe 320, causing blockage of the heat collection pipe 320.

[0058] As Figure 8 As shown, in some embodiments, the snow melting and ice thawing pipeline module 300 includes a heat exchange pipe 310 buried in the cover plate 110. The heat exchange pipe 310 includes a heat exchange main pipe 311 and a number of heat exchange branch pipes 312 connected to the main pipe. The heat exchange main pipe 311 is connected to the heat collection pipe 320, receives the heat carried by hot air or steam, and disperses it through the heat exchange branch pipes 312 to melt the ice and snow above the cover plate 110.

[0059] It should be noted that the end of the heat exchange branch pipe 312 can be treated in an open manner. Of course, in order to prevent rainwater from entering, the opening should face downwards. It can also be treated in a closed or semi-closed manner. The hot air or water vapor carrying heat from the self-heating pack 210 transfers heat to the cover plate 110 by heat transfer when encountering the lower temperature of the cover plate 110 for snow melting and ice thawing. The hot air becomes cold air, and the water vapor condenses into water. The condensed water and cold air can be discharged from the end of the heat exchange branch pipe 312. A small amount of condensed water condenses in the heat collection pipe 320 and will flow back into the self-heating pack 210 along the heat collection pipe 320 (when the valve at the heat outlet 215 is not closed). On the other hand, due to the water collection function of the water collection tank module 500, the water in the control water tank 220 continuously enters the self-heating pack 210, so that no negative pressure is formed in the self-heating pack 210.

[0060] Generally, the snow melting and ice thawing area of the snow melting and ice thawing pipeline module 300 is the cover plate 110 and its nearby area. As Figure 7 shown, the present invention can be set in a locally ice-prone area on the road for local de-icing, or can be distributed in a scattered dot pattern on the road surface 2 for overall de-icing of the road surface 2.

[0061] As Figure 10As shown, in some embodiments, the water collecting tank module 500 includes a water collecting pipe 510 buried in the inner surface of the cover plate 110 and provided with a large number of small holes, and a water collecting tank 520 arranged in the heating box 120 and located above the heating pack module 200. The water collecting pipe 510 is connected to the water collecting tank 520 or is connected to the water collecting tank 520 after being collected through a main pipe; the bottom outlet of the water collecting tank 520 is connected to the top inlet 221 of the control water tank 220 through a circulating water valve 529.

[0062] As a preferred embodiment, a plurality of water collecting tanks (not shown) can be arranged on the cover plate 110, and the water collecting tanks are covered with a grid plate or a ditch cover plate 110, and the water collecting pipe 510 is arranged in the water collecting tank, and a large number of plum blossom holes are opened around the water collecting pipe 510 for collecting water. In order to improve the water collecting efficiency, the water collecting pipe 510 is divided into a water collecting main pipe 511 and a plurality of water collecting branch pipes 512, and the water collecting branch pipes 512 distributed in the cover plate 110 are collected through the water collecting main pipe 511 and then sent to the water collecting box 520, and of course, there can be multiple water collecting main pipes 511.

[0063] Alternatively, another technical solution may be adopted, for example, the cover plate 110 itself is cast by permeable concrete, and the water collecting pipe 510 is directly pre-buried in the permeable concrete.

[0064] In order to improve the water collection efficiency, the water collection main pipe 511 is provided with multiple water outlet pipes 513 extending into the water collection tank 520, so as to ensure that the water in the water collection main pipe 511 enters the water collection tank 520 in time.

[0065] like Figure 10 As shown, in some embodiments, the bottom of the water collecting tank 520 is divided into a water storage area 521 and a filter area by a partition, and a water collecting inclined plate 530 is arranged above the filter area, and the recovered water entering the water collecting tank 520 is collected into the water storage area 521 through the water collecting inclined plate 530; the filter area is divided into several levels of grit chambers connected in series by a partition vertically arranged at the bottom of the water collecting tank 520, and connecting ports are provided on adjacent grit chambers and on the partitions between the water storage area 521 and the adjacent grit chambers, and the last level of grit chamber is provided with a water collecting tank outlet connected to the outside of the water collecting tank 520, and the water collecting tank outlet is connected to the circulating water valve 529 through a return channel. In this embodiment, the grit chamber has two levels, a large-mesh filter 524 is provided on the first connecting port between the water storage area 521 and the first-stage grit chamber 522, a medium-mesh filter 525 is provided on the second connecting port between the first-stage grit chamber 522 and the second-stage grit chamber 523, and a small-mesh filter 526 is provided at the water outlet of the water collecting tank of the second-stage grit chamber 523. The multi-stage mesh filter design not only improves the filtration efficiency but also extends the service life of the filter.

[0066] As a preferred embodiment, Figure 10As shown in the figure, a plurality of baffles 527 with gradually increasing heights are provided at the inner bottom of the water storage area 521 and the grit chamber along the water flow recovery direction. The water storage area 521 or the grit chamber is divided into multiple sub-grit chambers along the water flow direction by the baffles 527. The water in the water storage area 521 needs to cross the baffles 527 step by step to continue flowing, and the maximum sedimentation effect is achieved through the baffles 527.

[0067] As Figure 11 shown in the figure, in some embodiments, the water storage tank module 400 includes a water storage tank 401. The bottom outlet of the water storage tank 401 is connected to the top inlet 221 of the control water tank 220 through a water supply pipe, and a water supply control valve 420 is provided on the water supply pipe; the return channel of the water outlet of the collection water tank is connected to the water storage tank 401 through a water replenishing pipe, and a water replenishing valve 528 is provided on the water replenishing pipe. It should be noted that the height of the water storage tank 401 can be higher or lower than that of the collection water tank 520; when the height of the water storage tank 401 is higher than that of the collection water tank 520, a power pump should be provided on the water supply pipe to lift the water.

[0068] It can be foreseen that the water storage tank 401 should also be provided with a water inlet pipe for adding water in the initial stage to store the water required to start the self-heating snow melting and ice melting device 1.

[0069] As Figure 7 、 8 shown in the figure, in some embodiments, the self-heating snow melting and ice melting device 1 further includes a monitoring module 700 and a control module 600. The monitoring module 700 includes a plurality of temperature sensors arranged on the cover plate 110 for monitoring whether the cover plate 110 or the road surface 2 is frozen or snow-covered. The control module 600 is connected to each control valve for judging whether to start the corresponding control valve for snow melting and ice melting according to the monitoring situation of the monitoring module 700. The control module 600 can be a PLC controller or an industrial control computer. The specific control valves are selected according to actual needs. For this embodiment, it includes a plurality of control valves 230 between the self-heating pack 210 and the control water tank 220, the water supply control valve 420 at the bottom of the water storage tank 401 entering the control water tank 220, the circulating water valve 529 for the collection water tank 520 to return to the control water tank 220, and the water replenishing valve 528 between the water storage tank 401 and the collection water tank 520; it should be noted that a liquid level gauge 222 can also be provided in the control water tank 220, and the liquid level gauge 222 is connected to the control module 600 through a signal line to collect the water level of the control water tank 220, and control the opening degree of each valve through the water level situation to prevent the water level in the control box from being too high in the initial stage of startup.

[0070] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should all be covered within the scope of the claims of the present invention.

Claims

1. A road construction method with snow melting and ice thawing functions, which installs a self-heating snow melting and ice thawing device on the road. The self-heating snow melting and ice thawing device includes a heating pack module, a snow melting and ice thawing pipeline module, a water storage tank module and a water collection tank module; The heating pack module includes a number of self-heating packs, and each self-heating pack is provided with a self-heating material that reacts with water; The snow melting and ice thawing pipeline module is connected to each self-heating pack through a heat pipeline, and conducts the heat generated in the self-heating pack to the road surface for snow melting and ice thawing; The water storage tank module is used to store the initial water for starting the self-heating pack; The water collection tank module is used to collect the water generated after the snow on the road surface melts and thaws, and return this water to the heating pack module through a pipeline to achieve recycling; and A modular box structure, the modular box structure includes a cover plate flush with the road surface and a heating box body buried underground and connected to the cover plate; the snow melting and ice thawing pipeline module is buried in the cover plate, and the heating pack module, the water storage tank module and the water collection tank module are all arranged in the heating box body; the self-heating snow melting and ice thawing device realizes modular installation in the installation hole by integrally hoisting the modular box structure; It is characterized in that The road construction method includes the following steps: Step 1: According to on-site survey, select the most easily frozen position as the installation point of the self-heating snow melting and ice thawing device, dig a pit at the installation point to form a working space, and install a mold for forming an installation hole in the working space according to the design elevation, size and shape of the self-heating snow melting and ice thawing device. Then, carry out subgrade construction around the mold until the subgrade reaches the same position as the top of the heating box body; Step 2: Preset heat diffusion pipes on the subgrade around the mold, and reserve heat diffusion pipe joints. Continue to carry out subgrade or road surface construction around the mold until the road surface design elevation is reached; Step 3: Remove the mold to form an installation hole, install the self-heating snow melting and ice thawing device in the installation hole, and connect the snow melting and ice thawing pipeline module to the surrounding heat diffusion pipe joints to complete the road construction.

2. The road construction method according to claim 1, It is characterized in that: The thickness of the cover plate is the same as that of the road surface layer, and the elevation after subgrade construction in Step 2 is the same as the top of the heating box body.

3. The road construction method according to claim 2, It is characterized in that: When carrying out road surface construction in Step 2, an operation gap for connecting the heat diffusion pipe joints is reserved between the cover plate and the surrounding road surface. After connecting the snow melting and ice thawing pipeline module and the heat diffusion pipe joints in Step 3, fill the operation gap according to the road surface layer construction method.

4. The road construction method according to claim 1, It is characterized in that: The heating pack module further includes a control water tank. The top inlet of the control water tank is connected to the water storage tank module. A number of self-heating packs are stacked vertically in the heating box body. The control water tank is arranged on the side of the stacked self-heating packs. The water inlet of each self-heating pack is connected to the water outlet at the corresponding height on the control water tank through a control valve. Each self-heating pack is provided with a heat outlet at the top on the side away from the water inlet. The heat outlets of all self-heating packs are collected and connected to the snow melting and ice thawing pipeline module through a heat collection pipeline. The water in the heating box body enters the self-heating pack under the control of the control valve, reacts with the self-heating material to generate hot air or steam. The hot air or steam enters the heat collection pipeline through the heat outlet, and is collected by the heat collection pipeline and sent to the snow melting and ice thawing pipeline module.

5. The road construction method according to claim 4, characterized in that: A float control valve is provided at the heat outlet of each self-heating pack. When the liquid level in the self-heating pack is higher than the heat outlet, the float control valve automatically closes the heat outlet.

6. The road construction method according to claim 4, characterized in that: The snow melting and ice thawing pipeline module includes a heat exchange pipeline buried in the cover plate. The heat exchange pipeline includes a heat exchange main pipe and a number of heat exchange branch pipes connected to the main pipe. The heat exchange main pipe is connected to the heat collection pipeline, receives the heat carried by the hot air or steam, and is dispersed through the heat exchange branch pipes to melt the ice and snow above the cover plate.

7. The road construction method according to claim 6, characterized in that: The water collection tank module includes a water collection pipe buried in the inner surface of the cover plate with a large number of small holes and a water collection tank arranged above the heating pack module in the heating box body. The water collection pipe is connected to the water collection tank or is connected to the water collection tank through a main pipe. The bottom outlet of the water collection tank is connected to the top inlet of the control water tank through a circulating water valve.

8. The road construction method according to claim 7, characterized in that: The bottom of the water collection tank is divided into a water storage area and a filter area by a partition. A water collection inclined plate is arranged above the filter area. The recycled water entering the water collection tank is collected into the water storage area through the water collection inclined plate. The filter area is divided into several stages of sedimentation tanks connected in series by a partition vertically arranged at the bottom of the water collection tank. Communication ports are provided on the partitions between adjacent sedimentation tanks and between the water storage area and adjacent sedimentation tanks. The last stage sedimentation tank is provided with a water collection tank outlet communicating to the outside of the water collection tank. The water collection tank outlet is connected to the circulating water valve through a return channel.

9. The road construction method according to claim 7, characterized in that: The water storage tank module includes a water storage tank. The bottom outlet of the water storage tank is connected to the top inlet of the control water tank through a water supply pipe. A water supply control valve is provided on the water supply pipe. The return channel of the water collection tank outlet is connected to the water storage tank through a make-up water pipe.

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