A control method for preventing frost heave damage and drought damage to a canal body

Abstract

The present invention provides a control method for preventing frost heave damage and drought damage to a canal body. Along the length of the canal body, a plurality of pipeline system modules are spaced apart in the soil at the bottom of the canal body, and a first main pipeline and a second main pipeline are buried. The first main pipeline is connected to the front end of each pipeline system module through each first branch pipeline, and the second main pipeline is connected to the rear end of each pipeline system module through each second branch pipeline. Before winter, the moisture content of the soil at the bottom of the canal body is reduced; after winter, high-temperature airflow is blown into each pipeline system module to exchange heat between the pipeline system module and the soil, thereby increasing the temperature of the soil at the bottom of the canal body, thereby effectively preventing frost heave damage to the canal body; when drought occurs, water is replenished to the soil at the bottom of the canal body, thereby effectively preventing drought damage to the canal body.

Description

Technical Field

[0001] The present invention belongs to the technical field of water conservancy projects, and in particular relates to a control method for preventing frost heave damage and drought damage to a canal body. Background Art

[0002] In winter in cold regions, the subsoil beneath and around the canal body freezes due to low temperatures, forming permafrost. This causes frost heave, which in turn leads to uneven bulging of the canal foundation, damaging the canal structure and causing cracking, leakage, and even collapse, seriously impacting its service life. In summer, droughts may occur, during which the subsoil beneath and around the canal body loses water and dries out. This can cause the subsoil to shrink (reduce in volume), causing deformation and damage to the canal body. Furthermore, the loss of water and drying of the subsoil, combined with the drying of the canal body itself, creates the risk of cracking and drying out. Summary of the Invention

[0003] The purpose of the present invention is to effectively solve the technical problem of canal damage caused by frost heave of the foundation in winter and drought in summer in cold regions, and to provide a control method for preventing canal damage caused by frost heave damage and drought damage.

[0004] The present invention is achieved through the following technical solutions:

[0005] A control method for preventing frost heave damage and drought damage to a canal body includes a pipeline system module, a first main pipeline, and a second main pipeline; the pipeline system modules are buried in the soil at the bottom of the canal body, and there are multiple pipeline system modules, which are arranged at intervals along the length of the canal body; the first main pipeline is buried in the soil on one side of the canal body, and the first main pipeline is connected to the front end of each pipeline system module through each first branch pipeline; the second main pipeline is buried in the soil on the other side of the canal body, and the second main pipeline is connected to the rear end of each pipeline system module through each second branch pipeline. The control method is as follows:

[0006] 1. Before winter, connect the first and second main pipelines to the water vapor extraction device to generate negative pressure in each pipeline system module, extracting water vapor from the soil at the bottom of the canal, reducing the moisture content of the soil at the bottom of the canal, and preventing frost heave damage to the canal;

[0007] Second, after entering winter, the first trunk pipeline is connected to the hot air generating device as the air inlet pipeline, and the second trunk pipeline is used for air outlet. The hot air generating device is used to blow high-temperature air into each pipeline system module, so that the pipeline system module and the soil can exchange heat, increase the temperature of the soil at the bottom of the canal body, and prevent frost heave damage to the canal body;

[0008] 3. When drought occurs, the first trunk pipeline and the second trunk pipeline are connected to the water supply device to supply water to each pipeline system module to replenish moisture to the soil at the bottom of the canal body to prevent drought damage to the canal body.

[0009] In the above technical solution, the hot air generating device is connected to the first main pipeline, and the second main pipeline is connected to the exhaust device. The two work simultaneously to increase the air flow velocity of the entire system, thereby increasing the heat exchange rate.

[0010] In the above technical solution, the air outlet of the air extraction device is connected to the air inlet of the hot air generating device through a pipeline, thereby forming a circulation, which can utilize waste heat and reduce energy consumption.

[0011] In the above technical solution, the first trunk pipeline and the second trunk pipeline are both led out to the surface through vertical pipelines for connection to external equipment.

[0012] In the above technical solution, the pipeline system module includes a serpentine pipeline, a side inclined vertical pipe and a side horizontal pipe, wherein the serpentine pipeline is laid in the lower soil of the bottom surface of the canal body; the side inclined vertical pipes are laid in the lower soil of both sides of the canal body, and a side inclined vertical pipe is connected to each turning part and the head and tail ends of the serpentine pipeline, and the top of the side inclined vertical pipe is closed; the side horizontal pipe is located in the lower soil of both sides of the canal body, and the side horizontal pipe is connected between two adjacent side inclined vertical pipes to connect the two adjacent side inclined vertical pipes; evenly distributed water holes are provided on the serpentine pipeline, the side inclined vertical pipe and the side horizontal pipe, and filter cloth is wrapped on the serpentine pipeline, the side inclined vertical pipe and the side horizontal pipe to prevent external soil from entering the pipe.

[0013] In the above technical solution, the distance between the serpentine pipe and the bottom surface of the canal body is 10-20 cm, and the serpentine pipe of each pipeline system module has 8-20 turns on one side; the inclination angle of each side inclined vertical pipe is consistent with the inclination angle of the side of the canal body itself, and the distance between the side inclined vertical pipe and the side of the canal body is 10-20 cm.

[0014] In the above technical solution, there are multiple side transverse tubes, which are arranged at intervals between two adjacent side inclined vertical tubes.

[0015] In the above technical solution, the diameters of the serpentine pipeline and the side inclined vertical pipe are equal, and the diameter of the side horizontal pipe is smaller than that of the serpentine pipeline and the side inclined vertical pipe.

[0016] In the above technical solution, fins are provided on the serpentine pipes, the side inclined vertical pipes and the side horizontal pipes of the pipe system module to enhance the heat exchange effect with the soil.

[0017] In the above technical solution, the burial depth of the first trunk pipeline and the second trunk pipeline is greater than the burial depth of the serpentine pipeline of the pipeline system module, so that moisture in the soil enters the pipeline system module and then flows into the first trunk pipeline and the second trunk pipeline.

[0018] The advantages and beneficial effects of the present invention are:

[0019] The present invention installs multiple pipeline system modules in the soil at the bottom of the canal along its length, and buries a first main pipeline and a second main pipeline. The first main pipeline communicates with the front end of each pipeline system module via first branch pipelines, and the second main pipeline communicates with the rear end of each pipeline system module via second branch pipelines. During regulation, the following three functions can be achieved:

[0020] 1. Before winter comes, reduce the moisture content of the soil at the bottom of the canal to effectively prevent frost heave damage to the canal;

[0021] 2. After winter, high-temperature airflow is blown into each piping system module to exchange heat with the soil (fins are installed on the serpentine pipes, side inclined vertical pipes and side horizontal pipes of the piping system module to enhance the heat exchange effect with the soil), thereby raising the temperature of the soil at the bottom of the canal body, thereby effectively preventing frost heave damage to the canal body;

[0022] 3. When drought occurs, water is replenished to the soil at the bottom of the canal, thereby effectively preventing the canal body from being damaged due to water loss and drying of the soil at the bottom of the canal during drought. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the cross-sectional structure of the canal.

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the canal.

[0025] Figure 3 This is a schematic structural diagram of the control pipeline system used in the present invention.

[0026] Figure 4 This is a structural principle diagram of the control pipeline system used in the present invention.

[0027] Figure 5 This is a side view structural principle diagram of the control pipeline system used in the present invention.

[0028] Figure 6 A schematic diagram of an embodiment of a water vapor extraction device.

[0029] Figure 7Schematic diagram of another embodiment of the water vapor extraction device. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

[0031] This embodiment provides a control method for preventing frost heave damage and drought damage to a canal body. The control method is based on a control pipeline system. Figure 1 -Attached Figure 4 The control pipeline system includes: a pipeline system module 3, a first main pipeline 1 and a second main pipeline 2.

[0032] The pipeline system module 3 is buried in the bottom soil of the canal body 7, and there are multiple pipeline system modules 3, which are arranged at intervals along the length direction of the canal body 7; the first main pipeline 1 is buried in the soil on one side of the canal body 7, and the first main pipeline 1 is connected to the front end of each pipeline system module 3 through each first branch pipeline 101; the second main pipeline 2 is buried in the soil on the other side of the canal body 7, and the second main pipeline 2 is connected to the rear end of each pipeline system module 3 through each second branch pipeline 201.

[0033] Furthermore, the water channel body 7 includes, from bottom to top, a sand cushion layer 71, a geotextile layer 72, and a lining layer 73. The water channel body 7 includes a bottom surface and two inclined side surfaces.

[0034] For further information, see the attached Figure 3The pipeline system module 3 includes a serpentine pipeline 31, a side inclined vertical pipe 32 and a side horizontal pipe 33, wherein the serpentine pipeline 31 is arranged in the lower soil of the bottom surface of the water channel body 7. Preferably, the distance between the serpentine pipeline 31 and the bottom surface of the water channel body 7 is 10-20 cm, and the serpentine pipeline 31 of each pipeline system module 3 preferably has 8-20 bends on one side; the side inclined vertical pipes 32 are arranged in the lower soil on both sides of the water channel body 7, and a side inclined vertical pipe 32 is connected to each bend of the serpentine pipeline 31 and the head and tail ends (that is, the bottom end of the side inclined vertical pipe 32 is connected to the bend of the serpentine pipeline 31), the top of the side inclined vertical pipe 32 is closed, and the inclination angle of each side inclined vertical pipe 32 is the same as the inclination angle of the side of the water channel body 7 itself. Consistent, the distance between the side inclined vertical pipe 32 and the side of the canal body 7 is also 10-20 cm; the side horizontal pipe 33 is located in the lower soil on both sides of the canal body 7, and the side horizontal pipe 33 is connected between two adjacent side inclined vertical pipes 32, so that the two adjacent side inclined vertical pipes 32 are connected. Furthermore, the number of side horizontal pipes 33 is multiple, and they are arranged at intervals between two adjacent side inclined vertical pipes 32; evenly distributed water-permeable holes are provided on the serpentine pipe 31, the side inclined vertical pipe 32 and the side horizontal pipe 33, so that the serpentine pipe 31, the side inclined vertical pipe 32 and the side horizontal pipe 33 can interact with the surrounding soil for water and gas, and the serpentine pipe 31, the side inclined vertical pipe 32 and the side horizontal pipe 33 are wrapped with filter cloth to prevent external soil from entering the pipe.

[0035] Furthermore, the diameters of the serpentine pipe 31 and the side inclined vertical pipe 32 are equal, and the diameter of the side transverse pipe 33 is smaller than those of the serpentine pipe 31 and the side inclined vertical pipe 32 .

[0036] Furthermore, fins may be provided on the serpentine pipe 31 , the side inclined vertical pipe 32 and the side horizontal pipe 33 of the pipe system module 3 to enhance the heat exchange effect with the soil.

[0037] Furthermore, the burial depth of the first and second trunk pipelines 1 and 2 is greater than the burial depth of the serpentine pipeline 31 of the pipeline system module 3, so that moisture in the soil enters the pipeline system module 3 and then flows into the first and second trunk pipelines 1 and 2. The diameters of the first and second trunk pipelines 1 and 2 are greater than the diameters of the individual pipelines of the pipeline system module 3.

[0038] For further information, see the attached Figure 5 Both the first trunk pipeline 1 and the second trunk pipeline 2 are led to the surface through a vertical pipeline 5 for connection to external equipment. Preferably, a removable top cover 50 is provided at the top of the vertical pipeline (for example, the top cover and the top of the vertical pipeline are connected by threads). When no external equipment is connected, the top cover is closed and removed when external equipment needs to be connected.

[0039] Furthermore, the control pipeline system of the present invention is preferably arranged at key locations of the channel, for example, the channel locations at the inlet and outlet of the reservoir, the channel locations at the inlet and outlet of the hydropower station, etc.

[0040] Based on the above-mentioned control pipeline system, the control method of the present invention is as follows.

[0041] First, before winter comes (i.e., 2-3 weeks before the soil freezes), the moisture content of the soil at the bottom of the canal body 7 is reduced, thereby effectively preventing the canal body 7 from being damaged by frost heave.

[0042] Specifically, before the soil freezes, the first trunk pipeline 1 and the second trunk pipeline 2 are connected to the water vapor extraction device, so that each pipeline system module 3 generates negative pressure, thereby extracting water vapor from the soil at the bottom of the water channel body 7, reducing the moisture content of the soil at the bottom of the water channel body 7, and thus effectively preventing frost heave damage to the water channel body 7. It should be noted that because the water in the water channel will slowly seep into the soil at the bottom of the water channel body 7 through the tiny gaps in the water channel body 7, the moisture content of the soil at the bottom of the water channel body 7 is relatively high. Therefore, this operation is used to reduce the moisture content of the soil at the bottom of the water channel body 7, thereby effectively preventing frost heave damage to the water channel body 7.

[0043] For further information, see the attached Figure 6 The water vapor extraction device can employ a negative pressure pump capable of both water and air extraction. A suction pipe 61 is inserted into the vertical pipe 5 of the main pipeline, extending to the bottom of the main pipeline. A sealing cap 62 is installed at the top of the vertical pipe 5, creating a sealed connection between the suction pipe 61 and the top of the vertical pipe 5. The suction pipe 61 is connected to the inlet of the negative pressure pump. The negative pressure pump thereby applies negative pressure to the main pipeline and each of the pipeline system modules 3. Under negative pressure, moisture in the soil at the bottom of the canal body 7 flows through the light-transmitting filter cloth and water-permeable holes into each of the pipeline system modules 3. Under the action of gravity, the water in the pipeline system modules 3 flows into the main pipeline, where it is then pumped out by the suction pipe 61.

[0044] For further information, see the attached Figure 7The water vapor extraction device can also be a combination of a vacuum pump and a water pump. Insert a suction pipe 61 into the vertical pipe 5 of the main pipeline, and the suction pipe 61 extends to the bottom of the main pipeline. Install a sealing cover 63 at the top of the vertical pipe 5 to form a sealed connection between the suction pipe 61 and the top of the vertical pipe 5. The suction pipe 61 is connected to the inlet of the water pump. An air extraction interface is also provided on the sealing cover 63. The air extraction interface is connected to the inlet of the vacuum pump through an air extraction pipeline 64, so that the vacuum pump can evacuate the main pipeline and each pipeline system module 3. There is also a vacuum pump on the connecting pipeline between the suction pipe 61 and the inlet of the water pump. A valve 65 is provided. When the vacuum pump is working, the valve 65 is closed and the water pump does not work, thereby ensuring the vacuum pump's vacuuming effect on the main pipeline and each pipeline system module 3. Under negative pressure, the moisture in the soil at the bottom of the canal body 7 passes through the light-transmitting filter cloth and the water-permeable holes and enters each pipeline system module 3. Under the action of gravity, the water in the pipeline system module 3 will flow into the main pipeline; after the vacuum pump has worked for a period of time, the vacuum pump is turned off, the water pump is started and the valve 65 is opened, and the accumulated water in the main pipeline is pumped out by the suction pipe 61.

[0045] Second, after entering winter (i.e., due to the low temperature, the soil freezes), the temperature of the soil at the bottom of the canal body 7 is increased, thereby effectively preventing the canal body 7 from being damaged by frost heave.

[0046] Specifically, the first trunk pipeline 1 is connected to the hot air generating device as an air inlet pipeline (that is, the hot air generating device is connected to the top of the vertical pipeline 5 of the first trunk pipeline 1), and the second trunk pipeline 2 is used for air outlet. The hot air generating device is used to blow high-temperature air into each pipeline system module 3, so that the pipeline system module 3 exchanges heat with the soil (fins are provided on the serpentine pipeline 31, the side inclined vertical pipe 32 and the side horizontal pipe 33 of the pipeline system module 3 to enhance the heat exchange effect with the soil), thereby increasing the temperature of the soil at the bottom of the canal body 7, thereby effectively preventing the canal body 7 from frost heave damage.

[0047] Furthermore, to increase the airflow velocity of the entire system, the hot air generating device can be connected to the first main pipeline 1, while the second main pipeline 2 is connected to the exhaust device. The two devices can operate simultaneously, thereby increasing the airflow velocity of the entire system, that is, increasing the heat exchange rate. Furthermore, the air outlet of the exhaust device can be connected to the air inlet of the hot air generating device through a pipeline, thus forming a loop, which can utilize waste heat and reduce energy consumption.

[0048] Third, when drought occurs, water is replenished to the soil at the bottom of the canal body 7, thereby effectively preventing the canal body 7 from being damaged by drought.

[0049] Specifically, the first trunk pipeline 1 and the second trunk pipeline 2 are connected to a water supply device (a water supply vehicle can be used, the water supply vehicle is connected to the top of the vertical pipeline 5, and then water is supplied to the first trunk pipeline 1 and the second trunk pipeline 2, or a water pump is used to extract water from other areas and send it to the first trunk pipeline 1 and the second trunk pipeline 2), and water is supplied to each pipeline system module 3 to replenish the moisture of the soil at the bottom of the canal body 7, thereby effectively preventing the canal body 7 from being damaged due to water loss and drying of the soil at the bottom of the canal body 7 in a drought.

[0050] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0051] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0052] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A method for preventing frost heave damage and drought damage to a canal, characterized by: It includes a pipeline system module, a first trunk pipeline and a second trunk pipeline; the pipeline system module is buried in the bottom soil of the water canal body, and there are multiple pipeline system modules, which are arranged at intervals along the length of the water canal body; the first trunk pipeline is buried in the soil on one side of the water canal body, and the first trunk pipeline is connected to the front end of each pipeline system module through each first branch pipeline; the second trunk pipeline is buried in the soil on the other side of the water canal body, and the second trunk pipeline is connected to the rear end of each pipeline system module through each second branch pipeline; the pipeline system module includes a serpentine pipeline, a side inclined vertical pipe and a side horizontal pipe, which In the embodiment, the serpentine pipe is laid in the lower soil of the bottom surface of the water channel body; the side inclined vertical pipes are laid in the lower soil of both sides of the water channel body, and a side inclined vertical pipe is connected to each turning part and both ends of the serpentine pipe, and the top ends of the side inclined vertical pipes are closed; the side transverse pipes are located in the lower soil of both sides of the water channel body, and the side transverse pipes are connected between two adjacent side inclined vertical pipes to connect the two adjacent side inclined vertical pipes; the serpentine pipes, the side inclined vertical pipes and the side transverse pipes are all provided with evenly distributed water-permeable holes, and the serpentine pipes, the side inclined vertical pipes and the side transverse pipes are wrapped with filter cloth; The control method is as follows:

1. Before winter, connect the first and second main pipelines to the water vapor extraction device to generate negative pressure in each pipeline system module, extracting water vapor from the soil at the bottom of the canal, reducing the moisture content of the soil at the bottom of the canal, and preventing frost heave damage to the canal; Second, after entering winter, the first trunk pipeline is connected to the hot air generating device as the air inlet pipeline, and the second trunk pipeline is used for air outlet. The hot air generating device is used to blow air into each pipeline system module, so that the pipeline system module and the soil can exchange heat, increase the temperature of the soil at the bottom of the canal body, and prevent frost heave damage to the canal body; 3. When drought occurs, the first trunk pipeline and the second trunk pipeline are connected to the water supply device to supply water to each pipeline system module to replenish moisture to the soil at the bottom of the canal body to prevent drought damage to the canal body.

2. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: The hot air generating device is connected to the first main pipeline, and the second main pipeline is connected to the exhaust device. The two work simultaneously to increase the air flow speed of the entire system.

3. The method for preventing frost heave damage and drought damage to a canal according to claim 2, characterized in that: The air outlet of the air extraction device is connected to the air inlet of the hot air generating device through a pipeline to form a circulation.

4. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: The first trunk pipeline and the second trunk pipeline are both led out to the surface through vertical pipelines for connection to external equipment.

5. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: The distance between the serpentine pipe and the bottom surface of the canal body is 10-20 cm, and the serpentine pipe of each piping system module has 8-20 turns on one side; the inclination angle of each side inclined vertical pipe is consistent with the inclination angle of the side of the canal body itself, and the distance between the side inclined vertical pipe and the side of the canal body is 10-20 cm.

6. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: There are multiple side transverse tubes, which are arranged at intervals between two adjacent side inclined vertical tubes.

7. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: The diameters of the serpentine pipeline and the side inclined vertical pipe are equal, and the diameter of the side horizontal pipe is smaller than that of the serpentine pipeline and the side inclined vertical pipe.

8. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: Fins are provided on the serpentine pipes, side inclined vertical pipes and side horizontal pipes of the pipe system module to enhance the heat exchange effect with the soil.

9. The method for preventing frost heave damage and drought damage to a canal according to claim 1, characterized in that: The burial depth of the first trunk pipeline and the second trunk pipeline is greater than the burial depth of the serpentine pipeline of the pipeline system module.

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