CN212129188U - Freezing liquid stopping device - Google Patents
Freezing liquid stopping device Download PDFInfo
- Publication number
- CN212129188U CN212129188U CN202020272502.0U CN202020272502U CN212129188U CN 212129188 U CN212129188 U CN 212129188U CN 202020272502 U CN202020272502 U CN 202020272502U CN 212129188 U CN212129188 U CN 212129188U
- Authority
- CN
- China
- Prior art keywords
- liquid
- refrigerant
- module
- refrigeration
- freezing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses an among the freezing liquid stopping device, the refrigerant of refrigeration module output is along refrigerant transmission path cyclic transmission, makes liquid on every side solidify and form the freezing liquid stopping layer that separation liquid flows, has avoided the influence of groundwater to the exploitation operation, especially to the soft rock side slope region in open mine, and side slope groundwater is strengthened by structural stability and water proof after freezing greatly. The method adopts a physical method, does not need to consume materials for forming a water-blocking structure, only needs low-power operation when the frozen liquid-stopping layer is completely formed, has low cost but excellent effect, and is particularly suitable for mining operation in high and cold environments. Most importantly, after the exploitation is finished, the water resource can be restored after the liquid-stopping layer is frozen and melted, the water level can not be greatly reduced as the water is drained and reduced, the soil and water are fixed and controlled, the method is a green exploitation operation auxiliary scheme beneficial to ecological sustainable development, and the method has great significance for vegetation protection in grassland areas rich in mineral resources.
Description
Technical Field
The utility model belongs to the technical field of the technique of soil water conservation exploitation and specifically relates to a freezing liquid stopping device is related to.
Background
At the current mining site, water resources which can influence mining operation often exist in soil, for example, underground water resources in a mine are very abundant at the mining operation site of the mine, mining efficiency can be reduced or even mining operation can be stopped when underground water gushes out, potential safety hazards can be caused, particularly, in mining operation of soft rock slope areas of common types in an open-pit mine, terrain damage of the soft rock slope can be easily caused by flowing water, and further dangerous situations can occur.
To solve this problem, the conventional technical solutions in the industry include: the method adopts dredging and dewatering to drain water of an operation site, carries out curtain grouting to form a waterproof curtain, arranges a local concrete waterproof wall and the like, and combines dredging and blocking. However, these technical solutions all have obvious drawbacks, and firstly, for the method of dewatering and dewatering, the water resources at the operation site are often huge, and the method needs to consume large resources, which results in a great increase in operation cost, and affects the water resource distribution in the whole area, and the water level, which will cause serious damage to the local area ecosystem including the surface vegetation, and is not beneficial to ecological sustainable development, and especially, in the grassland area such as inner Mongolia with abundant mineral resources, it is important to implement soil water conservation mining in order to protect the ecosystem of the local grassland; for the curtain grouting method, a large amount of grouting materials are needed to form the water-blocking curtain, the consumption cost is high, the formed water-blocking curtain is limited to an area with low water content, effective blocking is difficult to form in an area with excessive water content, and the grouting materials can also cause adverse effects on the ecological environment; similarly, the local concrete waterproof wall needs a large amount of concrete materials, and is also difficult to form effective barriers in the areas with excessive water, and the formed concrete is difficult to treat and can cause adverse effects on the ecological environment.
Thus, there is a need for a more efficient solution.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the above problem, the present invention adopts the following technical solutions:
the utility model provides a freezing liquid device that ends, freezing liquid device that ends includes refrigeration module, refrigerant transmission path and power module. The two ends of the refrigerant transmission channel are respectively communicated with the refrigeration module and are used for circularly transmitting the refrigerant output by the refrigeration module along the refrigerant transmission channel so as to solidify the liquid in a target area around the refrigerant transmission channel and form a freezing liquid stop layer for blocking the liquid from flowing, and the power module is used for providing power for the transmission of the refrigerant.
Preferably, the refrigerant conveying channel is installed in an installation hole formed in the soil.
Preferably, a heat insulation layer is arranged at an opening of the mounting hole, and the refrigerant transmission channel penetrates through the heat insulation layer.
Preferably, the insulating layer comprises a reflective insulating film.
Preferably, the power module comprises at least one booster pump, and when the plurality of booster pumps are provided, the plurality of booster pumps are uniformly distributed at intervals along the same interval length on the refrigerant conveying channel.
Preferably, the freezing liquid stopping device further comprises a temperature monitoring module, and the temperature monitoring module is used for monitoring and displaying the temperature of the target area.
Preferably, the freezing liquid stopping device further comprises a refrigeration adjusting module, wherein the refrigeration adjusting module is used for acquiring the temperature of the target area measured by the temperature monitoring module, and adjusting the output power of the refrigeration module according to the temperature of the target area and a pre-programmed program.
Preferably, the freezing liquid stopping device further comprises a timing module, and the timing module is used for controlling starting and stopping of the refrigeration module and the power module according to a preset time sequence control program.
Preferably, the refrigerant includes any one of liquid nitrogen, derivatives of methane and ethane, azeotropic solution for refrigeration, and inorganic compound for refrigeration.
Compared with the prior art, the beneficial effects of the utility model include:
a freezing liquid stop layer for blocking underground water is formed by a freezing method, the structural stability and the water-resisting property of the frozen underground water are greatly enhanced, the mining requirement can be completely met, and particularly the requirement of a common soft rock slope area of an open-pit mine field can be met;
the problem of water blocking material residue does not exist even though the material for forming a water blocking structure is not consumed, when the frozen liquid stopping layer is completely formed, the frozen state is maintained only through lower power output, the required cost is lower, the effect is excellent, the economic benefit is high, the method is suitable for mining operation in a low-temperature and high-cold environment all the year round, the frozen liquid stopping layer is easier to realize, and the requirements on the power of a refrigeration module and the like are lower;
the structure is simple and convenient to install, and the transfer device is convenient and fast after the mining of the current area is finished;
after the exploitation operation is completed, the frozen liquid stopping layer can be melted, the water resource in the current region can be restored to the original state again, the phenomenon that the water level is greatly reduced or even is dried due to the dewatering and dewatering scheme in the prior art is avoided, the soil and water control is realized, the ecological system is prevented from being damaged, the ecological sustainable development green exploitation operation auxiliary scheme is facilitated, and the vegetation protection method has great significance for vegetation protection in grassland areas rich in mineral resources.
Drawings
Fig. 1 is a schematic structural diagram corresponding to an embodiment of a frozen liquid stopping device provided by the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the frozen liquid stopping device;
fig. 3 is a functional block diagram of another embodiment of the liquid freezing and stopping device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the same are merely exemplary and the invention is not limited to these embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details that are not relevant are omitted.
With reference to fig. 1 and 2, the utility model provides a freezing liquid stopping device, freezing liquid stopping device includes refrigeration module 1, refrigerant transmission channel 2 and power module 3.
The two ends of the refrigerant transmission channel 2 are respectively communicated with the refrigeration module 1, and the refrigerant transmission channel 2 is used for circularly transmitting the refrigerant output by the refrigeration module 1 along the refrigerant transmission channel 2, so that the liquid in the target area around the refrigerant transmission channel 2 is solidified and forms a freezing liquid stop layer for blocking the liquid from flowing, a freezing circulation system is formed, and the power module 3 is used for providing power for the transmission of the refrigerant.
Therefore, the freezing liquid stopping device is applied to a mining field, a freezing liquid stopping layer for stopping liquid flowing is formed in the mining and tunneling direction, a closed system of an ice wall can be constructed around a mine pit, effective stopping of underground water in soil can be achieved, a safe mining, production and operation field is obtained, and accordingly the influence of the underground water on the mining efficiency is avoided. Especially for soft rock slope areas of common types in open-pit mines, the structural stability and water resistance of the frozen slope underground water are greatly enhanced, and the water resistance requirement and the safety requirement of mining can be completely met. The technical scheme is different from the scheme that curtain grouting is carried out to form a waterproof curtain and a local concrete waterproof wall is arranged in the prior art, the method adopts a physical method, materials for forming a waterproof structure do not need to be consumed, the problem of water-blocking material residues does not exist, when a freezing liquid-stopping layer is completely formed, the freezing state can be maintained only by low power output, the required cost is low, the effect is good, the economic benefit is high, the method is particularly suitable for mining operation in a low-temperature alpine environment all the year round, the freezing liquid-stopping layer is easy to realize, and the requirements on the power of a refrigeration module 1 and the like are low. By adopting the freezing liquid stopping device, after the mining work of the current area is finished, the excavation can be continued to the current direction according to the original scheme, and the freezing liquid stopping device is once put into the movement along the excavation direction in the subsequent mining process to move the device equipment. Most importantly, the freezing liquid stopping layer is formed by temporarily freezing the liquid in the soil, after the mining work of the current area is finished, the freezing liquid stopping layer can be naturally melted or is artificially assisted to be melted, the water resource of the current area can be restored to the original state again after the freezing liquid stopping layer is melted, the phenomenon that the water level is greatly reduced or even is dried up due to the dewatering and dewatering scheme in the prior art is avoided, the soil and water control can be realized, the ecological system is prevented from being damaged, the auxiliary device for green mining operation is favorable for ecological sustainable development, and the auxiliary device has great significance for protecting the vegetation in grassland areas rich in mineral resources.
Of course, the above-mentioned only basic structure necessary for the liquid-stop freezer to form the liquid-stop freezer is described, on the basis of which, the liquid-stop freezer can be further improved, and the specific arrangement of more details can be added, so that more functions can be provided, and more advantages can be obtained, and for detailed examples, refer to the following:
as shown in fig. 2, in a specific embodiment, the refrigerant conveying channel 2 is installed in an installation hole 4 formed in the soil, so that the liquid in the soil around the refrigerant conveying channel 2 is solidified and forms a frozen liquid-stop layer blocking the flow of the liquid. In the actual operation process, in consideration of different stability of soil, the mounting holes 4 can be uniformly drilled in the mining and tunneling direction to arrange the refrigerant conveying channels 2 in the soil. The number of the mounting holes 4 can be set according to the power of the refrigeration module 1 and the refrigeration area of a refrigeration cycle system formed by the refrigerant transmission channel 2.
Further, a heat insulation layer 41 is arranged at an opening of the mounting hole 4, and the refrigerant transmission channel 2 penetrates through the heat insulation layer 41. Through setting up thermal-insulated heat preservation 41 at the opening part of mounting hole 4, can completely cut off the heat exchange of mounting hole 3 and external at its opening part, make the environment that mounting hole 3 is located constitutes a heat preservation system, reaches the effect of guaranteeing the low temperature effect in the mounting hole 4, further saves the energy consumption.
Illustratively, the insulating layer 41 comprises a reflective insulating film. The heat insulation layer 41 includes a reflective heat insulation film to form a reflective system, so that external light can be reflected, temperature rise caused by heat of absorbed light can be prevented, especially, a lasting reflective heat insulation effect can be achieved on infrared heat in a solar spectrum, and further low-temperature effect in the mounting hole 4 can be ensured.
In this embodiment, the refrigeration module 1 may be a conventional refrigeration unit, and the power module 3 may be a conventional refrigerant booster pump, wherein the power module 3 includes at least one booster pump, and when the booster pumps are plural, the plural booster pumps are uniformly distributed at intervals along the refrigerant conveying passage at equal intervals. Illustratively, the power module 3 includes a booster pump 31 externally disposed and sectional booster pumps 32 uniformly spaced along the refrigerant conveying passage 2 at equal intervals. As described above, in an actual mining operation, since a target area where a frozen liquid stop layer needs to be formed to block water is generally wide, the refrigerant transport passage 2 is installed with a large length, and although the output pressures of the different booster pumps are different, the power of only one booster pump 31 is still generally insufficient to push the refrigerant transported over a long distance, so that the plurality of segmented booster pumps 32 are uniformly distributed on each segment of refrigerant transport passage 2, and can function as a relay point, thereby ensuring that the refrigerant in the entire refrigerant transport passage 2 can stably obtain sufficient power to be transported.
As described above, the above-mentioned liquid freezing and stopping device may be further modified, referring to the control signals and connection relationship between the modules shown in fig. 3, for example: as a specific implementation manner, the frozen liquid stopping device further includes a temperature monitoring module 5, and the temperature monitoring module 5 is configured to monitor and display the temperature of the target area. Through the setting of above-mentioned temperature monitoring module 5, can real-time supervision target area's temperature, from this, the user can in time carry out corresponding adjustment to the output of refrigeration module 1 according to target area's temperature, for example when finding that the temperature reaches corresponding threshold value, after freezing the complete shaping of liquid stopping layer, can adjust low power output correspondingly and make and just maintain the frozen state, reach and reduce the energy consumption, further compression operating cost.
Furthermore, the freezing liquid stopping device may further include a refrigeration adjusting module 6, where the refrigeration adjusting module 6 is configured to obtain the temperature of the target area measured by the temperature monitoring module 5, and adjust the output power of the refrigeration module 1 according to the temperature of the target area and according to a pre-programmed program. That is, the refrigeration adjusting module 6 can automatically adjust the output power of the refrigeration module 1 by means of a pre-compiled program according to the target area temperature measured by the temperature monitoring module 5 in real time, so that the adjustment of the power output is more intelligent. The user can automatically consider the influence of factors such as actual environment and the like, and adjust the specific adjusting strategy through programming so as to achieve the optimal adjusting effect.
Illustratively, the freezing liquid stopping device further comprises a timing module 7, and the timing module 7 is configured to control starting and stopping of the refrigeration module 1 and the power module 3 according to a preset time sequence control program. Therefore, the user can start or stop the freezing liquid stopping device at regular time by using the timing module 7, and the operation of the freezing liquid stopping device can be more intelligent by matching with the time arrangement of mining operation.
The refrigerant may be selected according to actual needs, and in this embodiment, the refrigerant includes, but is not limited to, any one of liquid nitrogen, derivatives of methane and ethane, an azeotropic solution for refrigeration, and an inorganic compound for refrigeration. Illustratively, the inorganic compound for refrigerating may be liquid ammonia or carbon dioxide, and the derivative of methane and ethane may be freon.
In the present embodiment, the thickness of the frozen liquid-stop layer is determined by the amount of liquid in the soil, and the thickness of the frozen liquid-stop layer is generally 50 to 100 cm, which can meet the requirements of mining work.
The following is that the utility model provides a freezing liquid stopping device's two practical use cases:
the underground water level of a mining area is 20 meters, the burial depth of the mining area is 100 meters, the mining mode is open-pit mining, the first mining area is frozen in the mining area through the freezing liquid stopping device, the depth of the mounting hole 4 is set to be 105 meters, the mounting hole 4 needs to be subjected to water stopping treatment, one mounting hole 4 is arranged every 30cm, a high-pressure-resistant seamless steel pipe is arranged in the mounting hole 4 to serve as the refrigerant transmission channel 2, the refrigerant is Freon, the mounting hole 4 is arranged, the refrigerant transmission channel 2 is laid, then refrigeration work is started, after the refrigeration work is carried out for 15 days continuously, hydrological holes are drilled in the freezing area, no underground water exists in the holes, the refrigeration effect is good, mining work can be carried out, the freezing area is kept in a freezing state subsequently, and the freezing liquid stopping device moves towards the tunneling direction to continue the refrigeration liquid stopping work after the mineral mining in.
The water level of underground water in a mining area is 30 meters, the burial depth of the mining area is 80 meters, the mining mode is mining in a mine, the first mining area is frozen in the mining area through the freezing liquid stopping device, the depth of the mounting hole 4 is set to be 85 meters, the mounting hole 4 needs to be subjected to water stopping treatment, one mounting hole 4 is arranged every 30cm, high-pressure-resistant seamless steel pipes are arranged in the mounting hole 4 to serve as the refrigerant transmission channels 2, the refrigerant is liquid ammonia, the cooling work is started after the mounting holes 4 are arranged and the refrigerant transmission channel 2 is laid, after the continuous 12-day cooling work, and drilling hydrological holes in the freezing area, finding that no underground water exists in the holes, indicating that the freezing effect is good, carrying out mining operation, subsequently maintaining the temperature in the mine at about-5 ℃ to avoid damage to the freezing liquid stopping layer caused by local high temperature, and moving the freezing liquid stopping device to the tunneling direction to continue refrigerating liquid stopping work after mineral mining of the area is completed.
The utility model also provides a freezing end liquid method, include:
a mounting hole 4 is formed in the target area;
the freezing liquid stopping device is adopted, and the refrigerant transmission channel 2 of the freezing liquid stopping device is installed in the installation hole 4;
and starting a refrigeration module 1 and a power module 3 of the freezing liquid stopping device, so that the refrigerant output by the refrigeration module 1 is circularly transmitted along the refrigerant transmission channel 2, and the liquid in the target area around the refrigerant transmission channel 2 is solidified to form a freezing liquid stopping layer for stopping the liquid from flowing.
The implementation of the above-mentioned liquid freezing and stopping method can refer to the related contents of the above-mentioned liquid freezing and stopping device, and will not be described herein again.
To sum up, the utility model provides a freezing liquid stopping device utilizes the refrigerant of refrigeration module 1 output to follow refrigerant transmission channel 2 circulation transmission to make the liquid in the target area around refrigerant transmission channel 2 solidify and form the freezing liquid stopping layer that the separation liquid flows, structural stability and water proof after groundwater is frozen strengthen greatly, can satisfy the requirement of exploitation completely; the problem of water blocking material residue does not exist even if the material for forming a water blocking structure is not consumed, when the frozen liquid stopping layer is completely formed, the frozen state is maintained only by outputting with lower power, the required cost is lower, but the effect is excellent, and the economic benefit is high; the device has simple structure, convenient installation and convenient transfer; the key point is that after the mining operation is completed, the frozen liquid stopping layer can be melted, the water resource in the current area can be restored to the original state again, the water level can not be greatly reduced or even dried up like the scheme in the prior art, the soil and water control is realized, the ecological system can be prevented from being damaged, and the method is a green mining operation auxiliary scheme which is beneficial to ecological sustainable development. The utility model discloses very be fit for the mining operation that the exploitation scene and the rich grassland area of product resource carry on under the cold environment of microthermal alpine all the year round at the common soft rock side slope region in open-air mine field.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (9)
1. A freezing liquid-stopping device is characterized by comprising a refrigerating module, a refrigerant transmission channel and a power module,
the two ends of the refrigerant transmission channel are respectively communicated with the refrigeration module and are used for circularly transmitting the refrigerant output by the refrigeration module along the refrigerant transmission channel so as to solidify the liquid in a target area around the refrigerant transmission channel and form a freezing liquid stop layer for blocking the liquid from flowing, and the power module is used for providing power for the transmission of the refrigerant.
2. The frozen liquid stopping device as claimed in claim 1, wherein the refrigerant transferring passage is installed in an installation hole formed in the soil.
3. The freezing liquid stopping device of claim 2, wherein an opening of the mounting hole is provided with a heat insulation layer, and the refrigerant conveying channel passes through the heat insulation layer.
4. The frozen liquid stop device of claim 3, wherein the thermal insulation layer comprises a reflective thermal insulation film.
5. The apparatus as claimed in claim 1, wherein the power module comprises at least one booster pump, and when the plurality of booster pumps are provided, the plurality of booster pumps are uniformly spaced along the refrigerant conveying passage at equal intervals.
6. The frozen liquid stop device of claim 1 further comprising a temperature monitoring module for monitoring and displaying the temperature of the target area.
7. The frozen liquid stopping device according to claim 6, further comprising a refrigeration regulating module for obtaining the temperature of the target area measured by the temperature monitoring module, and regulating the output power of the refrigeration module according to a pre-programmed program according to the temperature of the target area.
8. The frozen liquid stopping device according to claim 1, further comprising a timing module for controlling the start and stop of the refrigeration module and the power module according to a preprogrammed timing control program.
9. The freezing liquid-stopping device of claim 1, wherein the refrigerant comprises any one of liquid nitrogen, derivatives of methane and ethane, azeotropic solution for refrigeration, and inorganic compound for refrigeration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020272502.0U CN212129188U (en) | 2020-03-06 | 2020-03-06 | Freezing liquid stopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020272502.0U CN212129188U (en) | 2020-03-06 | 2020-03-06 | Freezing liquid stopping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212129188U true CN212129188U (en) | 2020-12-11 |
Family
ID=73673850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020272502.0U Active CN212129188U (en) | 2020-03-06 | 2020-03-06 | Freezing liquid stopping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212129188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350203A (en) * | 2020-03-06 | 2020-06-30 | 呼伦贝尔东明矿业有限责任公司 | Liquid-stopping freezing device and liquid-stopping freezing method |
-
2020
- 2020-03-06 CN CN202020272502.0U patent/CN212129188U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350203A (en) * | 2020-03-06 | 2020-06-30 | 呼伦贝尔东明矿业有限责任公司 | Liquid-stopping freezing device and liquid-stopping freezing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107524459B (en) | Freezing water stop structure and method for vertical shaft and transverse passage of subway underground excavation station | |
| CN109209449B (en) | Intelligent heat preservation system for railway tunnel in cold region and control method thereof | |
| CN102322276A (en) | Tunneling engineering freeze-proofing structure in seasonally frozen ground region | |
| CN212129188U (en) | Freezing liquid stopping device | |
| CN107245923A (en) | A kind of intelligent bridge floor deicing or snow melting system of utilization shallow layer geothermal energy | |
| CN103205932A (en) | Pile-type anti-freezing system for bridge | |
| CN103938658A (en) | Structure capable of avoiding cold damage to high-temperature and unstable freeze soil area tunnel portal side slope | |
| CN104088652A (en) | Method for horizontal dynamic controlled-freezing water stopping between pipe roofs | |
| CN214366116U (en) | Railway tunnel active anti-freezing system in seasonally frozen soil area | |
| CN109024548B (en) | Local freezer and manufacturing method | |
| US9593868B2 (en) | Horizontal ground-coupled heat exchanger for geothermal systems | |
| CN111350203A (en) | Liquid-stopping freezing device and liquid-stopping freezing method | |
| CN112127945A (en) | Underground heat exchange tube heating system of cold region tunnel water-drainage prevention system by utilizing terrestrial heat | |
| CN111550251A (en) | Structure for realizing freezing of contact channel of shield tunnel of water-rich sand layer and construction process | |
| CN102720465B (en) | Method for forcibly unfreezing frozen hole | |
| CN110080817B (en) | Tunnel aeration cooling system based on phase change cold storage | |
| CN110067588B (en) | Tunnel cold air system based on phase change cold storage | |
| Haß et al. | Application of ground freezing for underground construction in soft ground | |
| CN202250107U (en) | Tunneling anti-freezing structure in seasonally frozen ground district | |
| US6976809B1 (en) | Method of preventing frost heave stress concentrations in chilled buried pipelines | |
| CN216665681U (en) | Device for preventing tunnel fire pipeline in cold area from freezing | |
| CN206174966U (en) | Diversion tunnel's freeze proof bloated structure of heat preservation | |
| CN113339873B (en) | Novel cold-proof and anti-freezing system and method for cold-region high-ground-temperature tunnel | |
| CN113586061A (en) | Anti-frost-heaving system of vertical shaft in cold region and construction method thereof | |
| CN204386651U (en) | Layers In Cold-area Tunnels heat-insulating water outlet structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |