CN219977795U - Pipeline sedimentation control test platform based on LNG natural cold energy - Google Patents
Pipeline sedimentation control test platform based on LNG natural cold energy Download PDFInfo
- Publication number
- CN219977795U CN219977795U CN202321695660.7U CN202321695660U CN219977795U CN 219977795 U CN219977795 U CN 219977795U CN 202321695660 U CN202321695660 U CN 202321695660U CN 219977795 U CN219977795 U CN 219977795U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- soil
- test
- lng
- cooler
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 101
- 238000004062 sedimentation Methods 0.000 title claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000000523 sample Substances 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 238000007710 freezing Methods 0.000 abstract description 12
- 230000008014 freezing Effects 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The utility model discloses a pipeline sedimentation control test platform based on LNG natural cold energy, in particular to a test device for researching the whole freezing process of an LNG external transmission pipeline laid on a soft soil foundation. The device comprises a soil body box, a cooler, a water level regulating box, a flexible liquid inlet pipeline, a flexible liquid return pipeline and a water delivery communicating pipe, wherein the test pipeline is connected with the cooler through the flexible liquid inlet pipeline and the flexible liquid return pipeline, and the soil body box is connected with the water level regulating box through the water delivery communicating pipe. The soil body case is internally filled with homogeneous soil, a test pipeline is laid in the middle upper part of the homogeneous soil in the soil body case, and temperature monitoring probes and resistance monitoring probes are uniformly distributed in the lower part of the homogeneous soil in the soil body case. The utility model utilizes the refrigerant medium circulating in the test pipeline to simulate the flow of LNG in the long-distance pipeline. The method can simulate the natural cold energy of LNG to freeze soil around the test pipeline to realize sedimentation control, and provides a theoretical basis for engineering application of natural cold energy sedimentation control of the LNG output pipeline.
Description
Technical Field
The utility model discloses a pipeline sedimentation control test platform based on LNG natural cold energy, in particular to a test device for researching the whole freezing process of an LNG external transmission pipeline laid on a soft soil foundation.
Background
LNG export pipelines are typically located at sea, while surrounding land is typically a man-made reclamation land area, which is a soft foundation. The soft soil foundation generally has the characteristics of small volume weight, large pore ratio, high water content and extremely low strength, and has poor bearing capacity and stability. When uneven settlement occurs, the pipeline laid on the soft foundation of the soil is deformed, distorted or inclined, and even broken accidents occur.
In order to control the settlement of the foundation, conventionally, there are taken measures such as a ramming rolling method, a filling layer changing method, a drainage consolidation method, a composite foundation method and the like. The existing sedimentation control method has the defects of high construction cost, high difficulty and incapability of preventing sedimentation and the like caused by the coupling effect between pipe and soil or environmental change and other factors during the operation of the LNG output pipeline. The utility model provides an external pipeline sedimentation control test platform based on LNG natural cold energy based on a soil freezing bearing capacity lifting principle at low temperature, so as to solve the problem of soft soil foundation pipeline sedimentation control. The principle is that natural cold of LNG is utilized to freeze a soft soil foundation of a natural gas output pipeline, a freezing coating layer is formed, and effective control of sedimentation is realized.
Disclosure of Invention
The utility model can be used for exploring the influence rule of the pipe soil freezing interaction, analyzing the optimal conveying temperature of the LNG external conveying pipeline under different influence factors, and providing a theoretical basis for engineering application of the LNG external conveying pipeline by utilizing natural cold energy sedimentation control.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
the utility model provides a pipeline subsidence control test platform based on LNG nature cold energy, includes soil body case, cooler, water level control box, flexible feed liquor pipeline, flexible liquid return pipeline and water delivery communicating pipe, and test pipeline and cooler pass through flexible feed liquor pipeline and flexible liquid return pipeline to be connected, and the soil body case passes through water delivery communicating pipe and is connected with the water level control box; the soil body case is inside to fill up the homogeneity soil, lays test tube way in the well upper portion of homogeneity soil in the soil body case, and the equipartition has buried a plurality of temperature monitoring probes and a plurality of resistance monitoring probes in the lower part of homogeneity soil in the soil body case, and a plurality of temperature monitoring probes and a plurality of resistance monitoring probes pass through the wire and are connected with data acquisition system, subside the observation window has been seted up to the left and right sides on soil body case upper portion, soil pressure sensor has been buried to the equipartition in the homogeneity soil of test tube way top and below, and test tube way's upper and lower both sides equipartition is fixed with a plurality of resistance strain gauge, and test tube way's front and back both sides equipartition is fixed with a plurality of resistance strain gauge, and soil pressure sensor and resistance strain gauge pass through the wire and are connected with data acquisition system.
Specifically, be equipped with cooler outlet pipe, cooler inlet pipe and cooler temperature regulation knob on the cooler, the cooler outlet pipe links to each other with the entry of test pipeline through flexible feed liquor pipe, and the cooler inlet pipe links to each other with the test pipeline export through flexible liquid return pipeline.
Specifically, a water level observation ruler is arranged on the water level adjusting box, and a water level adjusting valve is arranged on the water level adjusting box.
Specifically, a flow regulating valve, a flowmeter, a pressure transmitter and a temperature transmitter are arranged on the flexible liquid inlet pipeline.
Specifically, the diameter of the test pipeline is 1/10 of the width of the box body, the length-diameter ratio of the test pipeline is smaller than 100, the test pipeline is made of low-temperature-resistant steel, and the test pipeline is horizontally paved at the middle position of the upper part of the soil body box.
Specifically, soil pressure sensor corresponds the setting with resistance strain gauge, and the interval of laying of resistance strain gauge in test pipeline axial direction equals.
Specifically, the flexible liquid inlet pipeline and the flexible liquid return pipeline are respectively connected with the test pipeline through the size conversion head.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model utilizes the refrigerant medium circulating in the test pipeline to simulate the flow of LNG in the long-distance pipeline. The method can simulate the natural cold energy of LNG to freeze soil around the test pipeline to realize sedimentation control, and provides a theoretical basis for engineering application of natural cold energy sedimentation control of the LNG output pipeline.
2. The influence test of different pipe conveying temperatures, soil moisture content and soil grain composition on freezing effect can be realized.
3. The method can evolve the whole process of freezing soil around the test pipeline, explore the influence rule of freezing soil around the test pipeline, and analyze the optimal running temperature of the LNG external transmission pipeline under different factors.
Drawings
FIG. 1 is a schematic illustration of the present utility model;
FIG. 2 is a schematic cross-sectional view of a soil box;
FIG. 3 is a schematic diagram of a test tube;
FIG. 4 is a side view of the internal structure of the soil box;
FIG. 5 is a top view of the internal structure of the soil box;
fig. 6 is a graph showing the positional relationship among the test pipe, the soil pressure sensor, and the resistive strain gauge.
The names of the parts in the drawings are as follows:
1. a water level adjusting tank; 2. a water level observation ruler; 3. a water level regulating valve; 4. a water delivery communicating tube; 5. a size conversion head; 6. a temperature monitoring probe; 7. a resistance monitoring probe; 8. a soil body box; 9. testing the pipeline; 10. a soil pressure sensor; 11. resistance strain gage; 12. a sedimentation observation window; 13. a flexible liquid return line; 14. a flexible liquid inlet line; 15. a flow meter; 16. a pressure transmitter; 17. a temperature transmitter; 18. a flow regulating valve; 19. a cooler outlet pipe; 20. a cooler inlet pipe; 21. a cooler temperature adjusting knob; 22. and a cooling machine.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-6, a pipeline sedimentation control test platform based on natural cold energy of LNG comprises a soil box 8, a test pipeline 9, a cooler 22 and a water level regulating box 1.
The soil box 8 is internally filled with homogeneous soil, a test pipeline 9 is laid in the middle upper part of the homogeneous soil, and a plurality of temperature monitoring probes 6 and a plurality of resistance monitoring probes 7 are uniformly distributed in the lower part of the homogeneous soil. The temperature monitoring probes 6 and the resistance monitoring probes 7 are connected with a data acquisition system through wires, and the temperature and the water content of soil in the soil box 8 are measured by the temperature monitoring probes 6 and the resistance monitoring probes 7.
The left and right sides of the upper part of the soil box 8 are provided with sedimentation observation windows 12. By observing the height of the connection position of the test tube 9 with the flexible liquid inlet line 14 and the flexible liquid return line 13, the sedimentation condition of the test tube 9 can be obtained.
The soil body box 8 is connected with the water level regulating box 1 through the water delivery communicating pipe 4. The water level regulating box 1 is provided with a water level observing ruler 2, and the height of the water level in the water level regulating box 1 is determined through the water level observing ruler 2. The water level regulating box 1 is provided with a water level regulating valve 3. The water level in the water level regulating box 1 can be controlled through the water level regulating valve 3, so that the control of the water level in the homogenized soil in the soil box 8 is realized.
Soil pressure sensors 10 are uniformly distributed and buried in the homogenized soil above and below the test pipeline 9, a plurality of resistance strain gauges 11 are uniformly distributed and fixed on the upper side and the lower side of the test pipeline 9, and a plurality of resistance strain gauges 11 are uniformly distributed and fixed on the front side and the rear side of the test pipeline 9. The soil pressure sensor 10 is arranged corresponding to the resistance strain gauge 11, and the laying intervals of the resistance strain gauge 11 in the axial direction of the test pipeline 9 are equal. The soil pressure sensor 10 and the resistance strain gauge 11 are connected with a data acquisition system through wires. The stress strain of the test pipe 9 and the pressure of the homogenized soil around the test pipe 9 are monitored by means of the soil pressure sensor 10 and the resistive strain gauge 11.
The test pipe 9 and the cooler 22 are connected by a flexible liquid inlet line 14 and a flexible liquid return line 13. The cooler 22 is provided with a cooler outlet pipe 19, a cooler inlet pipe 20 and a cooler temperature adjusting knob 21. The cooler outlet pipe 19 is connected to the inlet of the test pipe 9 through the flexible liquid inlet pipe 14, and the cooler inlet pipe 20 is connected to the outlet of the test pipe 9 through the flexible liquid return pipe 13. The flexible liquid inlet pipeline 14 and the flexible liquid return pipeline 13 are respectively connected with the test pipeline 9 through the size conversion head 5. The temperature of the circulating cooling capacity of the cooler 22 can be controlled by controlling the temperature adjusting knob 21.
The flexible liquid inlet pipeline 14 is provided with a flow regulating valve 18, a flowmeter 15, a pressure transmitter 16 and a temperature transmitter 17. The flow rate, temperature and pressure of the liquid inlet of the circulating cold quantity and the flow rate of the liquid inlet for adjusting and controlling can be measured while the circulating cold quantity is provided for the test pipeline 9.
The cooling machine 22 provides a circulating cooling capacity of about-20 ℃ of the low-temperature fluid. By changing the water level height in the water level adjusting box 1, the control of the water level in the homogeneous soil in the soil box 8 is further realized. By changing the water level in the homogenized soil in the soil box 8, the influence of the change in the water level in the homogenized soil in the soil box 8 on the freezing process of the homogenized soil around the test pipe 9 is detected.
The test pipeline 9 is horizontally paved at the middle position of the upper part of the soil body box 8, the diameter of the test pipeline 9 is 1/10 of the width of the box body, and the length-diameter ratio of the test pipeline 9 is smaller than 100. The test pipeline 9 is made of low-temperature-resistant steel and can work in a low-temperature environment.
For the conventional gasification external transmission process system, the temperature of the external transmission natural gas is above 0 ℃, and the stratum is difficult to freeze, so that the low-temperature natural gas at the upstream of the gasification station is introduced into the external transmission pipeline to freeze the stratum around the pipeline, thereby realizing effective control on the settlement of the soft soil foundation and ensuring the safe operation of the pipeline.
The flexible liquid inlet line 14 and the flexible liquid return line 13 are connected with the test pipeline 9. And circulating cold energy is introduced into the test pipeline 9, so that equivalent simulation of the flow of the low-temperature LNG in the external pipeline is realized. The resistance strain gauge 11 is stuck to the circumference of the test pipeline 9, the soil pressure sensor 10 is laid right above and right below the test pipeline 9, the temperature detection probe 6 and the resistance detection probe 7 are buried in the homogenized soil in the soil body box 8, the temperature detection probe 6 and the resistance detection probe 7 are utilized to monitor the temperature and the water content of the soil body around the test pipeline 9 respectively, the soil pressure sensor 10 is buried in the homogenized soil around the test pipeline 9, the resistance strain gauge 11 is fixed to the circumference of the outer side of the test pipeline 9, and the soil pressure sensor 10 and the resistance strain gauge 11 are utilized to detect the soil pressure around the test pipeline 9 and the stress strain of the test pipeline 9 respectively.
By changing the pipe conveying temperature of the test pipeline 9, the freezing effect of different soil layers in water content and grain grading on the surrounding soil and the corresponding dynamic rule of the pipe soil are explored, and the optimal conveying temperature of the LNG external conveying pipeline under different parameters is analyzed in an emphasized mode.
As shown in fig. 3-5, the test pipeline 9 is buried in the upper center of the soil box 8. According to 1:20 proportion, the center of the Tianjin LNG export pipeline is 2.5m away from the earth surface, so the distance between the center of the test pipeline 9 and the top of the soil box 8 is 0.125m, the distance between the end of the test pipeline 9 and the soil box 8 is 5 times of the pipe diameter of the test pipeline 9, the dynamic influence is ignored, the diameter of the test pipeline 9 is 1/10 of the width of the soil box 8, and the length-diameter ratio of the test pipeline 9 is less than 100.
For better reaction of the yield point and the strain reaction of the test pipe 9, 5 measuring points are arranged on the test pipe 9, each measuring point comprises four detecting points, and the four detecting points are spaced by 90 degrees in the circumferential direction of the test pipe 9. Each detection point is fixed with a resistance strain gauge 11. The strain in the circumferential direction and the radial direction of the test pipe 9 is monitored by a plurality of resistance strain gages 11, so the total number of the resistance strain gages 11 is 20.
In order to monitor the soil pressure around the pipe when the test pipe 9 is settled, soil pressure sensors 10 are arranged on the upper side and the lower side of the test pipe 9, and the change of the soil pressure on the upper side and the lower side of the test pipe 9 in each settlement stage is monitored in real time. 5 soil pressure sensors 10 are respectively arranged in the homogenized soil with the upper and lower sides of the axis of the self-testing pipeline 9 being 20-30mm, and the interval between the soil pressure sensors 10 is 250mm.
In the soil pressure test, the soil pressure sensor 10 cannot be in direct contact with the surface of the test pipeline 9, the soil pressure sensor 10 is lightly pressed into homogeneous soil when the soil pressure sensor 10 is embedded, and the middle induction area of the soil pressure sensor 10 is prevented from being pressed hard in the installation process, so that the test element is prevented from being damaged.
Through simulating and evolving the whole process of freezing soil around the LNG output pipeline, the optimal output temperature of the LNG output pipeline under different influence factors is explored. The problem of uneven settlement of LNG output pipelines in soft soil foundations and the influence mechanism and dynamic response rule of the buried pipeline freezing process are solved.
In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. The utility model provides a pipeline subsides control test platform based on LNG nature cold energy, includes soil body case (8), cooler (22), water level adjustment case (1), flexible feed liquor pipeline (14), flexible return liquid pipeline (13) and water delivery communicating pipe (4), its characterized in that, test pipeline (9) and cooler (22) are connected through flexible feed liquor pipeline (14) and flexible return liquid pipeline (13), soil body case (8) are connected with water level adjustment case (1) through water delivery communicating pipe (4); the soil body case (8) is inside to fill up homogeneity soil, lays test pipeline (9) in the well upper portion of homogeneity soil in soil body case (8), and equipartition has buried a plurality of temperature monitoring probes (6) and a plurality of resistance monitoring probes (7) in the lower part of homogeneity soil in soil body case (8), and a plurality of temperature monitoring probes (6) and a plurality of resistance monitoring probes (7) pass through the wire and are connected with data acquisition system, subside observation window (12) have all been seted up on the left and right sides on soil body case (8) upper portion, soil pressure sensor (10) have been buried to the equipartition in the homogeneity soil of test pipeline (9) top and below, and the upper and lower both sides equipartition of test pipeline (9) is fixed with a plurality of resistance strain gauge (11), and the equipartition of front and back both sides of test pipeline (9) is fixed with a plurality of resistance strain gauge (11), and resistance gauge (11) pass through the wire and are connected with data acquisition system.
2. The pipeline sedimentation control test platform based on LNG natural cold energy according to claim 1, wherein a cooler outlet pipe (19), a cooler inlet pipe (20) and a cooler temperature adjusting knob (21) are arranged on the cooler (22), the cooler (22) outlet pipe is connected with an inlet of the test pipeline (9) through a flexible liquid inlet pipeline (14), and the cooler (22) inlet pipe is connected with an outlet of the test pipeline (9) through a flexible liquid return pipeline (13).
3. The pipeline sedimentation control test platform based on LNG natural cold energy according to claim 1 is characterized in that a water level observation ruler (2) is arranged on the water level adjusting box (1), and a water level adjusting valve (3) is arranged on the water level adjusting box (1).
4. The pipeline sedimentation control test platform based on LNG natural cold energy according to claim 1, wherein a flow regulating valve (18), a flowmeter (15), a pressure transmitter (16) and a temperature transmitter (17) are arranged on the flexible liquid inlet pipeline (14).
5. The pipeline settlement control test platform based on LNG natural cold energy according to claim 1, wherein the diameter of the test pipeline (9) is 1/10 of the width of the soil body box (8), the length-diameter ratio of the test pipeline (9) is smaller than 100, the test pipeline (9) is made of low-temperature-resistant steel, and the test pipeline (9) is horizontally paved at the middle position of the upper part of the soil body box (8).
6. The pipeline settlement control test platform based on LNG natural cold energy according to claim 1, wherein the soil pressure sensor (10) and the resistance strain gauge (11) are correspondingly arranged, and the laying intervals of the resistance strain gauge (11) in the axial direction of the test pipeline (9) are equal.
7. The pipeline settlement control test platform based on LNG natural cold energy according to claim 1, wherein the flexible liquid inlet pipeline (14) and the flexible liquid return pipeline (13) are respectively connected with the test pipeline (9) through a size conversion head (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321695660.7U CN219977795U (en) | 2023-06-30 | 2023-06-30 | Pipeline sedimentation control test platform based on LNG natural cold energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321695660.7U CN219977795U (en) | 2023-06-30 | 2023-06-30 | Pipeline sedimentation control test platform based on LNG natural cold energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219977795U true CN219977795U (en) | 2023-11-07 |
Family
ID=88595054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321695660.7U Active CN219977795U (en) | 2023-06-30 | 2023-06-30 | Pipeline sedimentation control test platform based on LNG natural cold energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219977795U (en) |
-
2023
- 2023-06-30 CN CN202321695660.7U patent/CN219977795U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109781773B (en) | Detection method for realizing layered telescopic type frost heaving detection device | |
| CN107024499A (en) | One-dimensional earth pillar frost-heaving deformation analyzer | |
| CN104697496B (en) | Split type static hydraulic pressure difference settlement monitoring system and installation method thereof | |
| CN107013812B (en) | A kind of THM coupling line leakage method | |
| CN113418647B (en) | Floating force testing device and method for shield segment in surrounding rock | |
| CN103591982B (en) | A kind of monitoring method of electric power tunnel structure problem | |
| CN108773598B (en) | Online monitoring device and method for leakage of buried oil tank | |
| CN113763674B (en) | Remote absolute stress real-time monitoring and early warning system and method | |
| CN102563359B (en) | Automatic monitoring method and system for vertical displacement of oil and gas pipeline in frozen soil area | |
| CN109870477B (en) | Non-contact frost heaving monomer for detecting soil and detection method thereof | |
| He et al. | Temperature tracer method in structural health monitoring: A review | |
| CN219977795U (en) | Pipeline sedimentation control test platform based on LNG natural cold energy | |
| CN109186445B (en) | Test equipment for wirelessly monitoring deformation of carbon rock slope surface and application method thereof | |
| CN110849930B (en) | Experimental device for measuring interaction between frozen soil and buried pipeline and preparation method | |
| CN112254764B (en) | System and method for rapidly positioning and monitoring dam leakage channel | |
| CN113898412A (en) | Freeze-induced expansion force monitoring method based on subway horizontal freezing | |
| CN108571947A (en) | A kind of offshore embankment multi-point settlement monitoring system | |
| RU167623U1 (en) | Device for determining the place of leakage of oil products in the pipeline using removable metal probes | |
| CN109765260B (en) | Flexible non-contact frost heaving monomer for detecting soil, detection device and detection method thereof | |
| CN104131527B (en) | Estuary coast engineering pipe bag dam information-aided construction system | |
| CN113029095B (en) | Coal mine earth surface wide area high-precision online settlement monitoring method | |
| CN112632676B (en) | Concrete dam stress gradient monitoring method | |
| CN105136652B (en) | Frost heave adaptive testing method of the bamboo composite pressure pipe under Frozen-thawed cycled effect | |
| CN113338255A (en) | Intelligent early warning system and method for service performance of transition section of railway road bridge in cold region | |
| CN103105333B (en) | In-situ test measuring system for cross-fault buried pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |