Heat tracing drainage system in seasonal frozen soil area
By designing the combination of frozen soil drainage pipes, solar panels and electric heating structures in the seasonal frozen soil area, the problem of drainage difficulties after groundwater in frozen soil area is solved, better drainage effect and stability are achieved, and slope Security.
Patent Information
- Application Number
- CN202421172185.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art problems of groundwater level fluctuations and slope stability reduction caused by soil freezing and thawing in the frozen depth range of the seasonal frozen soil area are difficult to achieve continuous drainage after groundwater freeze in winter, resulting in slope instability.
A seasonal frozen soil area heat-tracing drainage system including frozen soil drainage pipes, solar panels and electric heating structures was designed. Solar energy is collected through solar panels and stored in the battery. The electric heating structure is used to maintain the frozen soil drainage pipes without freezing, and Melt the frozen water in the surrounding frozen soil to achieve stable discharge of groundwater.
It improves the water conduction and drainage effect and stability, ensures the stability and safety of the slopes in the seasonal permafrost area, and can effectively discharge groundwater in any weather conditions, reducing the risk of slope instability.
Smart Images
Figure CN222349654U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rock and soil treatment engineering, in particular to a heating and drainage system in seasonal frozen soil areas. Background Art
[0002] In seasonally frozen soil areas, seasonal freezing and thawing of soil within the frozen depth range causes periodic changes in the drainage boundary of the water-rich strata slope, which in turn causes seasonal fluctuations in the groundwater level. Frozen water may reduce the stability of the slope, or even cause instability and landslides. In order to reduce the impact of groundwater level on slope stability, it is necessary to ensure the continuous drainage of groundwater on the slope in winter, adopt appropriate engineering measures for antifreeze treatment, and maintain the stability of the groundwater level to prevent the reduction of slope stability caused by the rise of groundwater level.
[0003] CN219568934U once disclosed a groundwater drainage device for water-rich slopes in seasonal frozen soil areas, the structure of which includes a stainless steel inner tube, a stainless steel outer tube and a high-transmittance organic glass tube, the first end of the stainless steel inner tube forms a tapered tube end, the stainless steel outer tube is sleeved on the outside of the second end of the stainless steel inner tube, the high-transmittance organic glass tube is sleeved on the outside of the stainless steel outer tube, and a plurality of seepage holes are opened on the tube wall of the stainless steel inner tube extending from the stainless steel outer tube. The utility model is used for drainage of groundwater in water-rich stratum slopes in seasonal frozen soil areas, and realizes continuous drainage of groundwater during the freezing period. It has the characteristics of simple structure, energy saving and environmental protection, and wide applicability. The device can be used to improve the stability of water-rich stratum slopes and reduce the occurrence of freezing damage in retaining engineering. However, the device only relies on a section of the heat collection section exposed on the slope to collect solar heat, so the heat collected is less, and it is difficult to easily achieve thawing and drainage of groundwater after freezing, and it is difficult to achieve heat collection and melting water under conditions of less sunlight such as cloudy days. Therefore, there are still defects such as poor drainage effect and poor drainage stability. Utility Model Content
[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide a seasonal frozen soil zone heating and drainage system with better drainage effect and better stability, so as to better ensure the stability and safety of the slopes in the seasonal frozen soil zone.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A seasonal frozen soil area heating drainage system comprises a frozen soil drainage pipe buried obliquely along the outer and lower sides in the frozen soil area slope, the inner end of the frozen soil drainage pipe is buried in the frozen soil area slope and is provided with a water inlet, and the other end is exposed outside the frozen soil area slope and is provided with a water outlet. The system is characterized in that an electric heating structure is also provided on the frozen soil drainage pipe, and a solar cell panel is also installed on the upper surface of the frozen soil area, the solar cell panel is connected to a battery, and the battery is connected to the electric heating structure through a controller.
[0007] On water-rich slopes in seasonal frozen soil areas, the surface layer of the slope is often frozen, but there is still fluid groundwater inside the soil. In this way, the groundwater cannot be discharged in winter. After the accumulated water pressure increases, it is easy to cause the slope to become unstable. Even if a simple retaining structure is set, it is often useless. Therefore, the applicant designed the utility model, so that when the utility model is used, the groundwater inside the frozen soil slope can be discharged by the set frozen soil drainage pipe. At the same time, the solar energy is collected by the solar panel during the day and converted into electrical energy and stored in the battery. Then, when needed, the battery is used to drive the electric heating structure to generate heat, so that the frozen soil drainage pipe itself will not be frozen, and the frozen water in the frozen soil around the drainage pipe is melted, and then discharged by the frozen soil drainage pipe. In this way, the solar energy can be better collected and converted into heat energy to melt the frozen soil, and the groundwater in the frozen soil area can be discharged more stably, and the slope stability can be maintained, which has the advantages of better drainage effect and better stability. During implementation, the frozen soil drainage pipes can be installed in groups at intervals to increase the area of the slope stability maintenance area.
[0008] Furthermore, it also includes a retaining wall arranged at the edge of the slope in the frozen soil area, and the outer end of the frozen soil drainage pipe passes through the retaining wall.
[0009] In this way, relying on the retaining wall, the stability of the slope can be further and better guaranteed.
[0010] Furthermore, a timing switch module is provided in the controller and is connected to the electric heating structure.
[0011] In this way, the electric heating structure can be turned on at a scheduled time to provide heating. It is usually set to be turned on once every 24-72 hours, with each working time of 10-30 minutes, which can better solve the problem of frozen soil drainage.
[0012] As another option, a temperature sensor is buried in the frozen soil inside the slope in the frozen soil area, and the temperature sensor is connected to the controller.
[0013] In this way, the electric heating structure can be turned on to melt water according to the actual detected frozen soil temperature.
[0014] Furthermore, the frozen soil drainage pipe is buried below the groundwater level.
[0015] This way, groundwater can be better drained away.
[0016] Furthermore, the frozen soil drainage pipe is a straight tube made of high thermal conductivity material. One end of the frozen soil drainage pipe forms a water outlet. The end where the water outlet is located has a heating section, and an electric heating tape is wound on the heating section to form an electric heating structure. The other end of the frozen soil drainage pipe is a water collection section, and a number of seepage holes are opened on the surface of the water collection section to form a water inlet.
[0017] In this way, when the frozen soil drainage pipe is used, it is buried obliquely on the edge of the slope in the frozen soil area, the electric heating tape is connected to the power supply to generate heat, and the heat is transferred to the pipe body to reach the water inlet section, so that it can maintain itself from being frozen to discharge the groundwater accumulated inside the slope, and at the same time, the frozen groundwater in the surrounding frozen soil area can be melted and discharged when necessary. Therefore, it has the advantages of simple structure, reliable heat transfer, easy implementation, convenient cost, and can achieve more stable and reliable groundwater discharge.
[0018] Furthermore, the frozen soil drainage pipe is made of stainless steel, which has the advantages of high thermal conductivity and stable quality.
[0019] Furthermore, a thermal insulation layer is provided outside the electric heating cable.
[0020] This can achieve thermal insulation, prevent heat leakage from the heating section, and ensure that more heat is transferred to the water collection section.
[0021] Furthermore, a water filter layer made of water-absorbing material is provided on the outer or inner surface of the frozen soil drainage pipe at the water collection section.
[0022] This can better achieve the infiltration and filtration of groundwater and prevent soil and rocks from entering and clogging the seepage holes.
[0023] Furthermore, a plurality of water-absorbing threads radiating outwards are connected to the outside of the water-collecting section.
[0024] In this way, the groundwater in the surrounding frozen soil can be better absorbed and discharged to the water collection section.
[0025] Furthermore, the interior of the water-absorbing wire is an electric heating wire connected and led out from the electric heating tape, and the exterior is a water-absorbing material wrapped therein.
[0026] In this way, the heating range of the electric heating structure can be greatly expanded, and the frozen groundwater in the permafrost in a larger range can be melted and discharged, greatly improving the use effect of the device.
[0027] In summary, the utility model has the advantages of better drainage effect and better stability, and can better ensure the stability and safety of slopes in frozen soil areas, especially seasonal frozen soil areas. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1This is a schematic diagram of the structure of Example 1 of the utility model.
[0029] Figure 2 for Figure 1 Schematic diagram of the structure of a separate frozen soil drainage pipe.
[0030] Figure 3 for Figure 2 AA section view in.
[0031] Figure 4 for Figure 2 BB section view in.
[0032] Figure 5 This is a schematic diagram of the structure of a separate frozen soil drainage pipe in Example 2 of the utility model. DETAILED DESCRIPTION
[0033] The utility model is further described in detail below in conjunction with specific implementation methods.
[0034] Example 1: See Figure 1-4 A seasonal frozen soil area heating drainage system includes a frozen soil drainage pipe 2 buried obliquely along the outer lower side in the frozen soil area slope, the inner end of the frozen soil drainage pipe is buried inside the frozen soil area slope and is provided with a water inlet, and the other end is exposed outside the frozen soil area slope and is provided with a water outlet 3. An electric heating structure is also arranged on the frozen soil drainage pipe, and a solar cell panel 4 is also installed on the upper surface of the frozen soil area slope, the solar cell panel 4 is connected to a battery 5, and the battery 5 is connected to the electric heating structure through a controller 6.
[0035] In frozen soil areas, especially on slopes in seasonal frozen soil areas, the surface layer of the slope is often frozen, but there is still fluid groundwater inside the soil. In this way, the groundwater cannot be discharged. After the accumulated water pressure increases, it is easy to cause the slope to become unstable. Even if a simple retaining project is set on the slope, it is often useless. Therefore, the applicant has designed the utility model, so that when the utility model is used, the groundwater inside the frozen soil slope can be discharged by the set frozen soil drainage pipe. At the same time, the solar energy is collected by the solar panel during the day and converted into electrical energy and stored in the battery. Then, when needed, the battery is used to drive the electric heating structure to generate heat, so that the frozen soil drainage pipe itself will not be frozen, and the frozen water in the frozen soil around the drainage pipe is melted, and then discharged by the frozen soil drainage pipe. In this way, the solar energy can be better collected and converted into heat energy to melt the frozen soil, and the discharge of groundwater in the frozen soil area can be realized more stably, the stability of the slope can be maintained, and the drainage effect is better and the stability is better. During implementation, the frozen soil drainage pipes can be installed in groups at intervals to increase the area of the slope stability maintenance area.
[0036] The invention also includes a retaining wall 1 arranged at the edge of a slope in a frozen soil area, and an outer end of a frozen soil drainage pipe 2 is arranged to pass through the retaining wall 1.
[0037] In this way, the slope stability can be further and better guaranteed by the set retaining wall. Of course, during implementation, it is also possible to implement it directly on the slope in the frozen soil area without the retaining wall structure.
[0038] Wherein, a timing switch module is arranged in the controller 6 and is connected to the electric heating structure.
[0039] In this way, the electric heating structure can be turned on regularly to supply heat, which can better solve the problem of frozen soil drainage. During implementation, a boost module can be further provided in the controller to boost the voltage to improve the heating efficiency of the electric heating structure.
[0040] As another option, a temperature sensor is buried in the frozen soil inside the slope in the frozen soil area, and the temperature sensor is connected to the controller.
[0041] In this way, the electric heating structure can be turned on to melt water according to the actual detected frozen soil temperature.
[0042] The frozen soil drainage pipe 2 is buried below the groundwater level 7 .
[0043] This way, groundwater can be better drained away.
[0044] Among them, the frozen soil drainage pipe 2 is a straight tube made of high thermal conductivity material. One end of the frozen soil drainage pipe forms an outlet 3. The end where the outlet is located has a heating section, and an electric heating tape 8 is wound on the heating section to form an electric heating structure. The other end of the frozen soil drainage pipe is a water collection section, and a number of seepage holes 9 are opened on the surface of the water collection section to form a water inlet.
[0045] In this way, when the frozen soil drainage pipe is used, it is buried obliquely on the edge of the slope in the frozen soil area, the electric heating tape is connected to the power supply to generate heat, and the heat is transferred to the pipe body to reach the water inlet section, so that it can maintain itself from being frozen to discharge the groundwater accumulated inside the slope, and at the same time, the frozen groundwater in the surrounding frozen soil area can be melted and discharged when necessary. Therefore, it has the advantages of simple structure, reliable heat transfer, easy implementation, convenient cost, and can achieve more stable and reliable groundwater discharge.
[0046] The frozen soil drainage pipe 2 is made of stainless steel, which has the advantages of high thermal conductivity and stable quality.
[0047] The electric heating tape 8 is also wrapped with a thermal insulation layer 10 .
[0048] This can achieve thermal insulation, prevent heat leakage from the heating section, and ensure that more heat is transferred to the water collection section.
[0049] The outer or inner surface of the frozen soil drainage pipe 2 at the water collection section is also provided with a water filter layer 11 made of a water-absorbing material.
[0050] This can better achieve the infiltration and filtration of groundwater and prevent soil and rocks from entering and clogging the seepage holes.
[0051] Example 2, see Figure 5 The difference between the present embodiment 2 and the embodiment 1 is that the structure of the frozen soil drainage pipe 2 is further improved, and the same structures such as the upper water outlet 3, the electric heating belt 8, the water seepage hole 9, the thermal insulation layer 10 and the water filter layer 11 are retained. At the same time, a plurality of water absorbing threads 12 diverging outward are connected outside the water collection section.
[0052] In this way, when the installation conditions are met, the groundwater in the surrounding frozen soil can be better adsorbed to the water collection section and discharged.
[0053] The interior of the water-absorbing wire 12 is an electric heating wire connected and led out from the electric heating belt, and the exterior is a water-absorbing material wrapped therein.
[0054] In this way, the heating range of the electric heating structure can be greatly expanded, and the frozen groundwater in the permafrost in a larger range can be melted and discharged, greatly improving the use effect of the device.
[0055] More specifically, during implementation, the photovoltaic power generation system should be installed in places with sufficient sunshine, and avoid being installed on the shady side of the slope; the time-controlled switch should be set to open at a scheduled time, generally once every 24-72 hours, and each working time should be 10-30 minutes; the installation of the frozen soil drainage pipe should be determined in combination with the slope gradient, seasonal freezing depth, and groundwater depth. The water collection section should be located below the seasonal freezing depth and in an area with enriched groundwater to ensure its water seepage effect and protect it from seasonal freezing and thawing. The outer end of the frozen soil drainage pipe can pass through the slope and extend a certain distance.
Claims
1. A seasonal frozen soil area heating drainage system, comprising a frozen soil drainage pipe buried obliquely in a frozen soil area slope along the outer lower side, the inner end of the frozen soil drainage pipe is buried inside the frozen soil area slope and is provided with a water inlet, and the other end is exposed outside the frozen soil area slope and is provided with a water outlet, characterized in that: An electric heating structure is also arranged on the frozen soil drainage pipe, and a solar panel is installed on the upper slope surface of the frozen soil area. The solar panel is connected to a battery, and the battery is connected to the electric heating structure through a controller.
2. The seasonally frozen soil area heating and drainage system according to claim 1, characterized in that: It also includes a retaining wall arranged at the edge of a slope in a frozen soil area, and the outer end of a frozen soil drainage pipe passes through the retaining wall.
3. The seasonally frozen soil area heating and drainage system according to claim 1, characterized in that: The controller is provided with a timing switch module connected to the electric heating structure; Alternatively, a temperature sensor is buried in the frozen soil inside the slope of the frozen soil area, and the temperature sensor is connected to the controller.
4. The seasonally frozen soil area heating and drainage system according to claim 1, characterized in that: The frozen soil drainage pipe is buried below the groundwater level.
5. The seasonally frozen soil area heating and drainage system according to claim 1, characterized in that: The frozen soil drainage pipe is a straight tube made of high thermal conductivity material. One end of the frozen soil drainage pipe forms a water outlet. The end where the water outlet is located has a heating section, and an electric heating tape is wrapped around the heating section to form an electric heating structure. The other end of the frozen soil drainage pipe is a water collection section, and a number of seepage holes are opened on the surface of the water collection section to form a water inlet.
6. The seasonally frozen soil area heating and drainage system according to claim 5, characterized in that: The frozen soil drainage pipe is made of stainless steel.
7. The seasonally frozen soil area heating and drainage system according to claim 5, characterized in that: The electric heating cable is also wrapped with an insulation layer.
8. The seasonally frozen soil area heating and drainage system according to claim 5, characterized in that: The outer or inner surface of the frozen soil drainage pipe at the water collection section is also provided with a water filtering layer made of water absorbing material.
9. The seasonally frozen soil area heating and drainage system according to claim 8, characterized in that: The outside of the water collection section is also connected to a plurality of water absorbing threads that diverge outwards.
10. The seasonally frozen soil area heating and drainage system according to claim 9, characterized in that: The interior of the water-absorbing wire is an electric heating wire connected from the electric heating tape, and the exterior is a wrapped water-absorbing material.