Prestressed reinforcement reinforced freeze-thaw-resistant canal with stable structure and preparation method of freeze-thaw-resistant canal

Abstract

The invention discloses a pre-stressed reinforcement reinforced freeze-thaw resistant canal with a stable structure and a preparation method, the pre-stressed reinforcement reinforced freeze-thaw resistant canal comprises a canal main body, and is characterized in that the canal main body is a modified concrete layer provided with pre-stressed reinforcements; a drainage structure is arranged below the canal main body; the drainage structure comprises a plurality of drainage pipelines laid in the water channel direction. The canal main body comprises a vertically arranged side wall and a flat bottom; the side walls on the two sides and the parallel bottom form a rectangular open water tank, and prestressed steel bars are arranged on the side walls and the bottom. In the aspect of structural reinforcement of the canal structure, the prestressed reinforcements are additionally arranged, and the prestressed reinforcements completely penetrate through the whole canal section. In the actual operation environment, especially in the northern area, the frost heaving phenomenon in winter can generate strong stress resistance to the canal, and the prestress generated by the prestressed steel bars can exactly and effectively offset the stress resistance, so that the occurrence probability of canal cracks is greatly reduced. And moreover, the length of each section of water channel is ingeniously increased through the design, and in the hydraulic engineering construction process, the construction difficulty can be remarkably reduced, the construction time can be greatly shortened, and the engineering efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, in particular to a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars and a preparation method thereof. Background Art

[0002] In the scope of water conservancy projects in the cold northern regions, the construction and maintenance of freeze-thaw resistant canals are caught in a very unique and complex background environment. With the continuous changes in the global climate, the frequency and intensity of extreme cold weather are on the rise, which undoubtedly makes the freeze-thaw problem of canals more severe and eye-catching. In cold regions, the temperature frequently drops below freezing point. Once the water in the canal freezes, it will expand in volume, exerting strong pressure on the canal structure. When this pressure changes periodically, that is, when it undergoes a freeze-thaw cycle, the concrete or masonry structure used in ordinary canals is prone to cracks, looseness, and even collapse, which has an extremely adverse and serious impact on the water conveyance efficiency and structural stability of the canal.

[0003] The design concept of traditional canals mostly focuses on the water transportation function, and there are great deficiencies in their adaptability to the special environment of cold regions. Its construction materials and construction techniques are difficult to effectively resist the frequent freeze-thaw effects. With the complexity and changeability of the climate, the scope of cold regions continues to expand, and the degree of freeze-thaw damage to canals continues to increase, which will not only cause the loss of precious water resources and greatly reduce the transportation efficiency, but also lead to rising maintenance costs. In addition, the conventional steel bar configuration of traditional canals has obvious limitations in resisting freeze-thaw stress and cannot meet the actual needs of its long-term and efficient operation.

[0004] It is precisely based on such severe situations and urgent needs that prestressed steel bar technology has emerged. Through the unique method of pre-stressing steel bars, the tensile and crack resistance of canal structures can be significantly and effectively enhanced. Looking back at the early anti-freeze-thaw technical means, it is not difficult to find that they are relatively simple. From the perspective of material selection, high-performance and environmentally friendly materials suitable for canal construction in cold areas are extremely scarce, and traditional antifreeze additives may also cause pollution and damage to the soil and water environment. From the perspective of construction technology, there was a lack of refined standards and quality control systems specifically formulated for cold environments at the time, which caused many canals to have the seeds of freeze-thaw hidden dangers in the early stages of construction. Furthermore, the geographical and geological conditions in cold areas are complex and diverse. In some areas, the groundwater level is high and the soil is extremely frozen and heaving, which further exacerbates the potential risk of freeze-thaw damage to the canal. At the same time, it also greatly increases the difficulty coefficient of the design and construction links, posing an uninterrupted and severe challenge to the performance and stability of existing freeze-thaw-resistant canals.

[0005] Therefore, the full development of canals with excellent and efficient anti-freeze and thaw performance has become a core key issue that urgently needs to be solved in the field of water conservancy engineering. This requires us to comprehensively consider many key factors such as the material's own characteristics, structural design optimization plans, and the effective application of new protection technologies, so as to ensure that the canals can achieve long-term and stable operation under low temperature conditions. Summary of the invention

[0006] In view of this, the object of the present invention is to provide a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars and a preparation method thereof, wherein the structure improves the freeze-thaw resistant function of the water channel by arranging prestressed steel bars in modified concrete.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a freeze-thaw resistant water channel with a stable structure reinforced with prestressed steel bars, comprising a water channel main body, wherein the water channel main body is a modified concrete layer provided with prestressed steel bars; a drainage structure is provided below the water channel main body; the drainage structure comprises a plurality of drainage pipes laid along the water channel direction.

[0009] Furthermore, the water channel body includes vertically arranged side walls and a flat bottom; the side walls on both sides and the flat bottom form a rectangular open water trough, and the side walls and the bottom are provided with prestressed steel bars.

[0010] Furthermore, the water channel body is composed of a segmented water channel body, and each segment of the water channel body is connected by prestressed steel bars; the prestressed steel bars are arranged along the laying direction of the water channel unit.

[0011] Furthermore, a rubber waterstop is provided between each section of the water channel body, the rubber waterstop is provided along the cross-section side of the water channel body, and the rubber waterstop is provided on the outer side and the inner side of the water channel unit cross-section respectively.

[0012] Furthermore, the drainage structure is used to drain the accumulated water at the bottom of the canal; the drainage pipe is laid in the middle position of the bottom of the canal.

[0013] Furthermore, the outer layer of the drainage pipe is provided with a thin layer of geotextile water-permeable material.

[0014] Furthermore, the drainage pipe is provided with a plurality of water-permeable channels, and the water-permeable channels are used to allow accumulated water to enter the drainage pipe.

[0015] Further, the modified concrete layer is prepared according to the following steps:

[0016] Obtaining raw materials for preparing freeze-thaw resistant concrete, the raw materials comprising: silicate cement, solid antifreeze agent, admixture, mineral admixture, denitrifying bacteria, fiber material and water;

[0017] The preparation is carried out according to the following steps. The specific process is as follows:

[0018] First, put the prepared silicate cement and mineral admixtures into the mixer and mix the dry materials thoroughly by stirring.

[0019] Then add the solid antifreeze and admixtures into the mixer in sequence, and stir to ensure that these materials are evenly distributed in the dry material mixture;

[0020] Then slowly add the fiber material into the mixer, increase the stirring speed while adding the fiber material, then slowly add the denitrifying bacteria solution into the mixer, start adding water at the same time, and stir to make the concrete form a uniform mixture, controlling the water-cement ratio within 0.45;

[0021] Finally, adjust the mixer speed back to medium speed and continue stirring to homogenize the concrete mixture.

[0022] The method for preparing a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars provided by the present invention comprises the following steps:

[0023] S1: Select raw materials and prepare the machinery required for construction;

[0024] S2: Earthwork construction, foundation construction: excavation of earthwork according to the designed depth and bottom width;

[0025] S3: Anchoring device, main structure construction: processing and installation of steel bars, embedding in sections, running through each section, and connecting each section;

[0026] S4: Concrete pouring: gravel layer is laid, modified concrete is prepared according to the mix ratio, and after being transported to the site, it is poured in layers by chute, pumping, etc.

[0027] S5: Install permeable materials on the outer layer, and auxiliary construction: install water stop strips and drainage pipes. Install water stop strips and drainage pipes after concrete pouring;

[0028] S6: Concrete curing and quality inspection;

[0029] S7: Water flow test and acceptance: After the quality is qualified, a water flow test will be carried out and the product will be put into use after passing the test.

[0030] Further, the modified concrete is prepared according to the following steps, and the specific process is as follows:

[0031] The preparation is carried out according to the following steps. The specific process is as follows:

[0032] First, put the prepared silicate cement and mineral admixtures into the mixer and mix the dry materials thoroughly by stirring.

[0033] Then add the solid antifreeze and admixtures into the mixer in sequence, and stir to ensure that these materials are evenly distributed in the dry material mixture;

[0034] Then slowly add the fiber material into the mixer, increase the stirring speed while adding the fiber material, then slowly add the denitrifying bacteria solution into the mixer, start adding water at the same time, and stir to make the concrete form a uniform mixture, controlling the water-cement ratio within 0.45;

[0035] Finally, adjust the mixer speed back to medium speed and continue stirring to homogenize the concrete mixture.

[0036] The beneficial effects of the present invention are:

[0037] The present invention provides a prestressed steel bar reinforced anti-freezing and thawing water channel with a stable structure, including a water channel body, characterized in that: the water channel body is a modified concrete layer provided with prestressed steel bars; a drainage structure is provided below the water channel body; the drainage structure includes a plurality of drainage pipes laid along the water channel direction. The water channel body includes a vertically arranged side wall and a flat bottom; the side walls on both sides and the flat bottom constitute a rectangular open water trough, and the side walls and the bottom are provided with prestressed steel bars; in terms of structural strengthening, the water channel structure is provided with prestressed steel bars, which are completely throughout the entire water channel. In the actual operating environment, especially in the northern region, the frost heave phenomenon in winter will produce strong anti-stress to the water channel, and the prestress generated by the prestressed steel bars can effectively offset this part of the anti-stress, thereby greatly reducing the probability of cracks in the water channel. In addition, this design cleverly increases the length of each water channel section, which can significantly reduce the construction difficulty, greatly reduce the construction time, and improve the engineering efficiency during the construction of water conservancy projects.

[0038] The modified concrete of the present invention has excellent impermeability, can effectively reduce the loss of water resources and ensure the water conveyance efficiency of the canal; its good frost resistance enables the canal to maintain structural stability in cold areas or in winter, avoiding cracking and peeling of concrete due to freeze-thaw cycles, thereby extending the service life of the canal; its strong wear resistance can resist long-term scouring of water flow and abrasion of solid particles such as mud and sand carried in the water; its excellent corrosion resistance can resist erosion and damage to the canal structure by chemicals, microorganisms, etc. in the water.

[0039] The prestress of the prestressed steel bar of the present invention can effectively offset part or all of the tensile stress that the canal may bear during use, greatly enhance the tensile strength of the canal structure, and significantly reduce the possibility of cracks caused by tensile stress on concrete, thereby improving the anti-seepage performance of the canal, avoiding leakage loss of water resources, and ensuring water delivery efficiency. From the perspective of structural stability, it can make the structure more stable, better resist interference from external factors such as water flow impact, soil side pressure, and temperature changes, reduce the risk of structural deformation or even damage, greatly extend the service life of the canal, and reduce maintenance and reconstruction costs.

[0040] The drainage pipe of the present invention can quickly remove water from the bottom of the canal, reduce water retention time, and reduce the risk of damage such as leakage and collapse of the canal due to long-term water accumulation. In addition, in the winter in the north, the thermal conductivity of the drier soil is relatively small. The drainage pipe can slow down the transfer of heat, make the soil temperature at the bottom of the canal relatively stable, and reduce the frequency and intensity of freeze-thaw.

[0041] In terms of drainage function optimization, two drainage pipes are carefully laid vertically in the middle of the bottom of the canal. These pipes are properly wrapped with permeable materials, and many small holes are evenly distributed on the pipes. In this way, the accumulated water at the bottom of the canal can be drained away promptly and quickly, effectively lowering the water level. During the freeze-thaw cycle in the north, the canal is not prone to serious structural damage such as displacement and collapse, which effectively guarantees the stability and durability of the canal.

[0042] The rubber waterstop of the present invention has excellent elasticity and deformation ability, can effectively adapt to the deformation of the canal connection caused by temperature change, foundation settlement or water pressure, tightly fit the gap, prevent leakage, ensure the water tightness of the canal, reduce the loss and waste of water resources, and ensure water delivery efficiency. Its good aging resistance can maintain a stable water-stopping effect under long-term sunlight, humid environment and various water erosion, greatly extending the waterproof life of the canal connection and reducing the cost of frequent maintenance and replacement.

[0043] Compared with traditional right-angle channels, the rounded corner structure design of the channel of the present invention can make water flow more smoothly and reduce energy loss; the rounded corners can make the water flow evenly distributed, reduce the generation of dead water areas, reduce the possibility of siltation, and avoid excessive scouring caused by excessive local water flow speed, thereby extending the life of the channel; at the same time, compared with channels with sharp inner angles, the rounded corner design has no hard-to-reach corners, making it easier to clean and maintain.

[0044] The present invention cleverly uses prestressed steel bars to penetrate two sections of the canal to connect them. In terms of materials, the present invention uses rubber waterstops. With its excellent sealing performance, rubber waterstops can effectively prevent water leakage. This feature plays a vital role in alleviating the freeze-thaw cycle phenomenon of the canal in extremely cold weather, effectively avoiding a series of freeze-thaw damage problems caused by leakage, and further improving the overall freeze-thaw resistance of the canal.

[0045] Compared with traditional canals, the innovative freeze-thaw resistant canal with prestressed steel bars of the present invention has been deeply expanded and extended in dealing with the settlement problem. By using prestressed steel bars to tighten each section of the canal, the integrity and stability of the canal structure are significantly enhanced. In response to extreme weather conditions in the north, bold innovations have been made in the field of freeze-thaw protection from both the material and structural aspects. Not only that, there have also been breakthroughs in drainage. Taking into account the significant damage that groundwater may cause to the canal bed, drainage pipes are innovatively laid under the gravel cushion layer, which can absorb gravel and groundwater in time, thereby effectively reducing common problems such as cracks and deformation caused by freeze-thaw cycles, comprehensively improving the performance and service life of the canal, and providing a solid and reliable guarantee for the stable operation of water conservancy projects in complex environments.

[0046] The innovative water channel carefully built by the present invention for anti-freezing and thawing actively adopts a variety of cutting-edge and advanced technical means. For example, the concrete mix ratio is deeply optimized, and high-performance antifreezing admixtures are added to comprehensively enhance the inherent antifreezing ability of concrete itself; prestressed steel bars are cleverly used to strengthen the integrity and density of the water channel structure, thereby effectively improving the antifreezing and thawing performance of concrete; drainage technology is rationally used to efficiently drain groundwater and accumulated water in a timely manner, thereby minimizing the serious damage to the water channel structure caused by freezing and expansion of water in a low-temperature environment. The organic and comprehensive application of these technologies has laid a solid and reliable foundation for the in-depth research and development and successful construction of new anti-freezing and thawing water channels. Its core purpose is to properly solve the problem of freezing damage to water channels in cold areas, comprehensively improve the reliability and service life of water conservancy facilities, and provide strong technical support and solid guarantee for water conservancy projects in cold northern regions.

[0047] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for explanation.

[0049] Figure 1 This is a three-dimensional schematic diagram of a new type of freeze-thaw resistant canal structure constructed based on prestressed steel bars.

[0050] Figure 2 Side view of a new freeze-thaw resistant canal structure constructed based on prestressed steel bars.

[0051] Figure 3 Detailed diagram of a new freeze-thaw resistant canal structure based on prestressed steel bars.

[0052] Figure 4 This is the distribution diagram of prestressed steel bars for the new freeze-thaw resistant canal structure constructed based on prestressed steel bars.

[0053] Figure 5 Schematic diagram of the drainage pipeline.

[0054] Figure 6 Detail of the drainage pipe.

[0055] Figure 7 This is the construction process flow chart of freeze-thaw resistant canals constructed based on prestressed steel bars.

[0056] In the figure, 1 represents prestressed steel bars, 2 represents drainage pipes, 3 represents rubber waterstops, 4 represents water-permeable material films, and 5 represents water-permeable channels. DETAILED DESCRIPTION

[0057] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0058] Example 1

[0059] like Figure 1 and Figure 2 As shown, the anti-freezing and thawing water channel with a stable structure reinforced by prestressed steel bars provided in this embodiment includes a water channel body; the water channel body is a modified concrete layer provided with prestressed steel bars;

[0060] A drainage structure is provided below the main body of the water channel; the drainage structure comprises a plurality of drainage pipes laid along the direction of the water channel;

[0061] The water channel body comprises vertically arranged side walls and a flat bottom; the side walls on both sides and the flat bottom form a rectangular open water trough, and the side walls and the bottom are provided with prestressed steel bars;

[0062] The water channel body in this embodiment can also be composed of segmented water channel bodies, and the segments of the water channel bodies are connected by prestressed steel bars; the prestressed steel bars are arranged along the laying direction of the water channel unit; Figure 3 and Figure 4 shown.

[0063] The red part of the prestressed steel bars in the figure is distributed on each unit channel. When the prestressed steel bars are tensioned, the steel bars will be pre-stretched and produce elastic retraction force, which enhances the bearing capacity of each section of the channel structure; the green part of the prestressed steel bars in the figure are arranged in sections on two sections of the channel, which plays a connecting role in terms of structure. The prestressed steel bars are set in sections of the channel and ensured to play a prestressing role after connection, mainly through the connection structure design method:

[0064] 1. Use threaded connectors at the steel bar connections to tightly engage the steel bars through the threads to ensure the continuity of force transmission, allowing each section of the steel bar to work together to maintain the overall prestressed state.

[0065] 2. Reasonably design anchoring devices at the sections to firmly fix the steel bars in the concrete structure. Different anchoring devices should be selected according to the construction conditions of the canal. Anchors can use sleeve anchors, straight thread sleeve anchors and tapered thread sleeve anchors. Large canal structures generally use straight thread sleeve anchors, which are straight cylinder-shaped with a smooth outer surface and threads engraved on the inner surface to match the threads of the steel bars. The anchoring device can transfer the force of the prestressed steel bars to the concrete. The force generated by the tension of the prestressed steel bars is transferred to the concrete through the contact interface between the anchor and the concrete, causing the concrete to generate pre-compression stress, ensuring that the entire canal structure can resist external forces as an organic whole when subjected to stress.

[0066] A rubber water stop is arranged between each section of the water channel body, and the rubber water stop is arranged along the cross-section side of the water channel body, and the rubber water stop is arranged on the outside and inside of the water channel unit cross-section respectively;

[0067] The drainage structure in this embodiment is used to drain the accumulated water at the bottom of the canal; the drainage pipe is laid in the middle of the bottom of the canal;

[0068] The outer layer of the drainage pipe is provided with a thin layer of geotextile water-permeable material; Figure 5 shown.

[0069] The drainage pipe is provided with a plurality of water-permeable channels, and the water-permeable channels are used to allow the accumulated water to enter the drainage pipe; Figure 6 shown.

[0070] The modified concrete layer in this embodiment is prepared according to the following steps:

[0071] Obtaining raw materials for preparing freeze-thaw resistant concrete, the raw materials comprising: silicate cement, solid antifreeze agent, admixture, mineral admixture, denitrifying bacteria, fiber material and water;

[0072] The modified concrete in this embodiment is prepared according to the following steps, and the specific process is as follows:

[0073] First, put the prepared silicate cement and mineral admixture into the mixer and stir at a low speed (30-60 revolutions per minute) for 1-2 minutes to fully mix the dry materials.

[0074] Then add the solid antifreeze and admixtures into the mixer in sequence, and continue stirring at medium speed (60-90 revolutions per minute) for 2-3 minutes to ensure that these materials are evenly distributed in the dry material mixture.

[0075] Then slowly add the fiber material into the mixer. To prevent the fiber from agglomerating, increase the stirring speed to 90-120 rpm while adding the fiber material. Then slowly add the denitrifying bacteria solution into the mixer and start adding water at the same time. Add water at a moderate speed and stir for more than 5 minutes to form a uniform mixture of concrete and control the water-cement ratio within 0.45.

[0076] Finally, return the mixer speed to medium and continue mixing for 2-3 minutes to give the concrete mixture a final homogenization.

[0077] The modified concrete provided in this embodiment uses sodium nitrite antifreeze as a solid antifreeze agent, which can prevent rust while preventing freezing; uses waterproofing agent and fly ash to block or fill the pores inside the concrete, which can resist the erosion of concrete by water pressure for a long time; adds denitrifying bacteria to the recycled aggregate to prevent water from entering the pores, reduces the absorption of free water inside the concrete, and can produce calcium carbonate crystals to gradually fill the gaps, greatly enhancing the ability of the concrete to resist water freezing expansion;

[0078] The dosage of the fiber material in this embodiment is 0.6-1.2kg / m^3;

[0079] Concrete; the mineral admixture content is 20%-40% of cement;

[0080] The dosage of admixture is 5%-8% of cement;

[0081] The dosage of solid antifreeze agent is 3%-5% of cement;

[0082] The volume dosage of denitrifying bacteria is 0.5%-2% of cement;

[0083] Cement: mineral admixture: fiber material: admixture: solid antifreeze agent: denitrifying bacteria: water = 1: 0.6: (0.04-0.1): (0.25-0.4): (0.15-0.25): (0.025-0.1): (0.3-0.6)

[0084] The freeze-thaw resistant canal constructed based on prestressed steel bars provided in this embodiment has excellent integrity and high compactness in terms of structural characteristics, and has significant advantages. On the one hand, it can effectively deal with the settlement problem that is very easy to occur under the cold climate conditions in the north, and on the other hand, it can effectively ensure the water tightness between the sections of the canal. At the same time, by cleverly adding drainage pipes, the irreversible damage caused by the freeze-thaw cycle to the canal bed is successfully reduced, thereby comprehensively improving the stability and durability of the canal in harsh environments.

[0085] This embodiment uses modified concrete, and the freeze-thaw resistant concrete includes the following raw materials: silicate cement, solid antifreeze, admixture, mineral admixture, denitrifying bacteria, fiber material and water. In the preparation of modified concrete: Raw materials: silicate cement is selected as the basic material. Solid antifreeze: sodium nitrite antifreeze, which can also play a role in rust prevention while preventing freezing. Admixture: waterproofing agent, used to block the pores inside the concrete to form a waterproof layer. Mineral admixture: fly ash, the hydration products generated by its volcanic ash activity reaction can fill the pores of concrete and can resist the erosion of concrete by water pressure for a long time. Use of bacteria: adding denitrifying bacteria to recycled aggregates can effectively prevent water from entering the pores, reduce the absorption of free water inside the concrete, and can produce calcium carbonate crystals, which can gradually fill the gaps and greatly enhance the ability of concrete to resist water freezing expansion. Fiber material: polypropylene fiber, these fibers can play the role of bridging cracks and prevent further expansion of cracks. At the same time, it can reduce the shrinkage of concrete, make the concrete structure denser, reduce the possibility of water intrusion, and thus enhance the anti-freeze and thaw performance.

[0086] Among them, the dosage of fiber material is 0.6-1.2kg / m 3 Concrete; the amount of mineral admixtures is 20%-40% of cement; the amount of admixtures is 5%-8% of cement; the amount of solid antifreeze is 3%-5% of cement; through the all-round optimization and innovative combination of raw materials, the antifreeze performance of concrete is effectively improved from the fundamental source, laying a solid foundation for the stable operation of the canal in cold environment.

[0087] The canal structure provided in this embodiment utilizes prestressed steel bars, so that the length of each section of the canal can be increased, which effectively reduces the construction difficulty and greatly shortens the construction time, and significantly improves the efficiency of engineering construction; at the same time, the prestress generated by the prestressed steel bars can accurately offset a part of the anti-stress caused by frost heave, greatly enhancing the integrity and density of the canal structure, reducing the infiltration of water, thereby effectively reducing the frequency and degree of damage of freeze-thaw cycles, and ensuring the long-term stability of the canal structure.

[0088] In this embodiment, two drainage pipes are carefully laid in the middle of the bottom of the canal. The pipes are densely covered with small holes, and the outside of the pipes are tightly wrapped with permeable materials. The laying of drainage pipes is of great significance. On the one hand, it can drain the accumulated water at the bottom of the canal in a timely and rapid manner, effectively reduce the serious damage to the canal structure caused by the freezing and expansion of water in a low temperature environment, and significantly reduce the possibility of cracks, deformation and other problems caused by freeze-thaw cycles; on the other hand, the drainage pipes can also regulate the temperature of the soil around the canal to a certain extent, and further optimize the external environment of the canal. In addition, timely discharge of accumulated water and lowering of the water level can effectively reduce the pressure on the canal structure, making it less likely for the canal to suffer structural damage such as displacement and collapse during the freeze-thaw process, effectively extending the service life of the canal and ensuring that it always maintains a good performance state during long-term operation.

[0089] In this embodiment, rubber waterstops are precisely installed at the joints of each section of the canal. With its good elastic properties and excellent water-stopping ability, rubber waterstops can flexibly adapt to the deformation of concrete structures caused by temperature fluctuations, foundation settlement and other complex factors, and can still maintain good sealing after deformation, effectively preventing water leakage, successfully solving the problem of water resource loss, and significantly improving the efficiency of water transportation, ensuring the efficient and stable operation of the canal water delivery function.

[0090] Example 2

[0091] like Figure 7 As shown, the method for preparing a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars provided in this embodiment comprises the following steps:

[0092] S1: Raw material selection, construction preparation: review design drawings; purchase required materials; prepare construction machinery; measure and lay out, that is, use professional measuring instruments and methods to determine the location and direction of the canal on the ground. Accurately measure distance, angle, height difference, and lay out the line based on these data, using wooden stakes, lime powder and other materials to mark the center line of the canal, slope opening line and other key lines on the ground;

[0093] S2: Earthwork construction, foundation construction: excavate the earthwork according to the designed depth and bottom width, set up intercepting ditches at the location adjacent to the hillside and the canal to prevent the water flow on the hillside from carrying mud and other impurities into the canal. Set up drainage ditches to remove excess water near the canal. Repair the canal bottom and slope to treat the weak foundation;

[0094] S3: Anchoring device, main structure construction: Process and install the steel bars, embed them in sections, cut the steel bars into appropriate lengths (i.e. sections) according to the length of the canal, design requirements, etc. Then place (embed) these sectioned steel bars into the concrete structure of the canal one by one, connecting each section;

[0095] S4: Concrete pouring: gravel layer is laid, modified concrete is prepared according to the mix ratio, and after being transported to the site, it is poured in layers using chutes (trough-shaped structures to guide water flow or transport concrete, sediment, etc.) and pumping methods;

[0096] S5: Install permeable materials on the outer layer, and auxiliary construction: install water stop strips and drainage pipes. Install water stop strips and drainage pipes after concrete pouring;

[0097] S6: Concrete curing, quality inspection: visual inspection of concrete for cracks;

[0098] S7: Water flow test and acceptance: After the quality is qualified, a water flow test is carried out to observe whether there is leakage or deformation, and it is put into use after passing the test;

[0099] The modified concrete in this embodiment is prepared according to the following steps, and the specific process is as follows:

[0100] First, put the prepared silicate cement and mineral admixtures into the mixer and stir at a low speed (30-60 revolutions per minute) for 1-2 minutes to fully mix the dry materials.

[0101] Then add the solid antifreeze and admixtures into the mixer in sequence, and continue stirring at medium speed (60-90 revolutions per minute) for 2-3 minutes to ensure that these materials are evenly distributed in the dry material mixture.

[0102] Then slowly add the fiber material into the mixer. To prevent the fiber from agglomerating, increase the stirring speed to 90-120 rpm while adding the fiber material. Then slowly add the denitrifying bacteria solution into the mixer and start adding water at the same time. Add water at a moderate speed and stir for more than 5 minutes to form a uniform mixture of concrete and control the water-cement ratio within 0.45.

[0103] Finally, return the mixer speed to medium and continue mixing for 2-3 minutes to give the concrete mixture a final homogenization.

[0104] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars, comprising a water channel body, characterized in that: The main body of the water channel is a modified concrete layer provided with prestressed steel bars; a drainage structure is provided below the main body of the water channel; the drainage structure comprises a plurality of drainage pipes laid along the direction of the water channel.

2. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The water channel body comprises vertically arranged side walls and a flat bottom; the side walls on both sides and the flat bottom form a rectangular open water trough, and the side walls and the bottom are provided with prestressed steel bars.

3. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The water channel body is composed of a segmented water channel body, and each segment of the water channel body is connected by prestressed steel bars; the prestressed steel bars are arranged along the laying direction of the water channel unit.

4. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 3, characterized in that: A rubber water stop is arranged between each section of the water channel body. The rubber water stop is arranged along the cross-section side of the water channel body. The rubber water stop is respectively arranged on the outer side and the inner side of the water channel unit cross-section.

5. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The drainage structure is used to drain the accumulated water at the bottom of the canal; the drainage pipe is laid in the middle position of the bottom of the canal.

6. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The outer layer of the drainage pipe is provided with a thin layer of geotextile water-permeable material.

7. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The drainage pipe is provided with a plurality of water-permeable channels, and the water-permeable channels are used to allow accumulated water to enter the drainage pipe.

8. The freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars as claimed in claim 1, characterized in that: The modified concrete layer is prepared according to the following steps: Obtaining raw materials for preparing freeze-thaw resistant concrete, the raw materials comprising: silicate cement, solid antifreeze agent, admixture, mineral admixture, denitrifying bacteria, fiber material and water; The preparation is carried out according to the following steps. The specific process is as follows: First, put the prepared silicate cement and mineral admixture into the mixer and mix the dry materials thoroughly by stirring; Then add the solid antifreeze and admixtures into the mixer in sequence, and stir to ensure that these materials are evenly distributed in the dry material mixture; Then slowly add the fiber material into the mixer, increase the stirring speed while adding the fiber material, then slowly add the denitrifying bacteria solution into the mixer, start adding water at the same time, and stir to make the concrete form a uniform mixture, controlling the water-cement ratio within 0.45; Finally, adjust the mixer speed back to medium speed and continue stirring to homogenize the concrete mixture.

9. A method for preparing a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars, characterized in that: The following steps are involved: S1: Select raw materials and prepare the machinery required for construction; S2: Earthwork construction, foundation construction: excavation of earthwork according to the designed depth and bottom width; S3: Anchoring device, main structure construction: processing and installation of steel bars, embedding in sections, running through each section, and connecting each section; S4: Concrete pouring: gravel layer is laid, modified concrete is prepared according to the mix ratio, and after being transported to the site, it is poured in layers by chute, pumping, etc. S5: Install permeable materials on the outer layer, and auxiliary construction: install water stop strips and drainage pipes. Install water stop strips and drainage pipes after concrete pouring; S6: Concrete curing, quality inspection; S7: Water flow test and acceptance: After the quality is qualified, a water flow test will be carried out and the product will be put into use after passing the test.

10. The method for preparing a freeze-thaw resistant water channel with a stable structure reinforced by prestressed steel bars according to claim 9, characterized in that: The modified concrete is prepared according to the following steps, and the specific process is as follows: The preparation is carried out according to the following steps. The specific process is as follows: First, put the prepared silicate cement and mineral admixture into the mixer and mix the dry materials thoroughly by stirring; Then add the solid antifreeze and admixtures into the mixer in sequence, and stir to ensure that these materials are evenly distributed in the dry material mixture; Then slowly add the fiber material into the mixer, increase the stirring speed while adding the fiber material, then slowly add the denitrifying bacteria solution into the mixer, start adding water at the same time, and stir to make the concrete form a uniform mixture, controlling the water-cement ratio within 0.45; Finally, adjust the mixer speed back to medium speed and continue stirring to homogenize the concrete mixture.

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