CN111595708B - Soil transverse erosion quality measuring method - Google Patents
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- CN111595708B CN111595708B CN202010312021.2A CN202010312021A CN111595708B CN 111595708 B CN111595708 B CN 111595708B CN 202010312021 A CN202010312021 A CN 202010312021A CN 111595708 B CN111595708 B CN 111595708B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- G—PHYSICS
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- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0048—Hydraulic means
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a method for measuring the transverse soil erosion quality, which comprises the following steps: collecting a soil sample through a sampling pipe; transferring the soil sample in the sampling tube into a sample tube, wherein the bottom of the sample tube is provided with a bottom opening, and the side wall of the sample tube is provided with a side opening communicated with the bottom opening; laying a soil transverse erosion quality measuring device, placing a sample tube in the soil transverse erosion quality measuring device, and arranging a pressure sensor below the sample tube; performing wave test on a soil sample in the sample tube through a soil transverse erosion quality measuring device, and acquiring continuous pressure information in the wave test period in real time through a pressure sensor; and calculating the soil transverse erosion rate of the soil sample according to the continuous pressure information. By adopting the method, the soil transverse erosion rate of the coastal wetland and the reservoir area under the action of waves can be accurately quantified.
Description
Technical Field
The invention relates to the technical field of ecological engineering, in particular to a method for measuring the transverse erosion quality of soil.
Background
Under the action of strong hydrodynamic factors such as waves, the front edge of the coastal wetland and the hydro-fluctuation belt of the reservoir and lake form a step-shaped steep-sill landform. With the continuous action or enhancement of power factors, the sediment at the base of the steep bank can be eroded or even collapsed, so that the vegetation front edge is integrally eroded and receded, and the safety of coastal zones and inland water areas is threatened. Sediment erosion means a reduction in vegetation area and a loss of ecological service function. The mature vegetation zone of the coastal wetland has important ecological service functions of wave dissipation, wave reduction, biological diversity maintenance and the like. The stability of the hydro-fluctuation belt of the reservoir is of great significance to the maintenance of the operation safety of the reservoir. Thus, the stability of the sediment under the action of wave erosion plays an irreplaceable role in the safety of the coastal lake ecosystem and the maintenance of the habitat. In recent years, the phenomenon of strong erosion caused by wave washing is generated on salt marsh coasts in Jiangsu, mangrove coast in Fujian Xiamen and Zhanjiang province and bank slopes in hydro-fluctuation belts in three gorges reservoir areas, and negative effects and certain threats are generated on biodiversity and ecological service functions of coastal wetlands and reservoir operation safety. Therefore, the research on the erosion process and the internal mechanism of the sediment caused by the waves has important theoretical and practical significance on the safety of the coastal wetland and the reservoir.
Under the background, in order to explore the tolerance degree of soil to wave erosion, accurate quantification of the wave-induced soil erosion rate is a technical problem to be solved urgently. Because the influence factors of the soil erosion process under the field wave condition are more, and the coupling effect is complex, an indoor control experiment (a wave water tank) is needed for measurement. When the existing wave water tank experiment is used for measuring the soil erosion rate, the vertical soil erosion measurement under the action of waves and currents generally adopts methods for measuring the near-bottom bed critical flow rate, the erosion depth and the like, and the method is only suitable for detecting a light beach with an erosion surface being a low-gradient inclined plane and cannot be suitable for a salt marsh (marsh) leading edge land with a gradient close to the vertical, namely the method for measuring the horizontal soil erosion rate of the vertical surface caused by waves does not exist in the prior art.
In conclusion, the method for measuring the transverse soil erosion quality is designed, and has important significance for realizing the research on the wave-induced soil erosion of the coastal wetland and the reservoir area and slowing down the bank slope erosion.
Disclosure of Invention
The invention aims to provide a method for measuring the transverse soil erosion quality, which can realize the accurate quantification of the transverse soil erosion rate of the coastal wetland and the reservoir area under the action of waves.
In order to solve the technical problem, the invention provides a soil transverse erosion quality measuring method, which comprises the following steps: collecting a soil sample through a sampling pipe; transferring the soil sample in the sampling tube into a sample tube, wherein the bottom of the sample tube is provided with a bottom opening, and the side wall of the sample tube is provided with a side opening communicated with the bottom opening; laying a soil transverse erosion quality measuring device, placing the sample tube in the soil transverse erosion quality measuring device, and arranging a pressure sensor below the sample tube; performing wave test on the soil sample in the sample tube through the soil transverse erosion quality measuring device, and acquiring continuous pressure information in the wave test period in real time through the pressure sensor; and calculating the soil transverse erosion rate of the soil sample according to the continuous pressure information.
As an improvement of the scheme, the step of collecting the soil sample through the sampling pipe comprises the following steps: avoiding the main root position of the arbor, and vertically erecting the sampling tube on the soil surface; knocking the sampling pipe to keep the sampling pipe vertically embedded in the soil; when the depth of the sampling pipe embedded into the soil is larger than the preset depth, excavating the soil around the sampling pipe, and taking out the sampling pipe and the soil sample contained in the sampling pipe.
As an improvement of the scheme, when the sampling pipe is knocked, a horizontal plate is placed at the top of the sampling pipe, and the sampling pipe is kept vertically embedded into soil by knocking the horizontal plate.
As an improvement of the scheme, the step of transferring the soil sample in the sampling tube into the sample tube comprises the following steps: vertically embedding the sample tube into the soil sample of the sampling tube, wherein the embedding depth is greater than a preset depth, and the inner diameter of the sample tube is smaller than that of the sampling tube; placing the sampling tube and the sample tube on a cylindrical table, knocking the sampling tube to enable the sampling tube and a soil sample contained in the sampling tube to move relatively until the sampling tube and the soil sample are separated, wherein the diameter of the cylinder is smaller than the inner diameter of the sampling tube; and intercepting the soil sample with the preset depth in the sample tube to form an erosion plane at the bottom opening and the side opening of the sample tube.
As an improvement of the scheme, the soil transverse erosion quality measuring device comprises a wave water tank, a wave making machine, a wave absorbing device and a pressure sensor; the wave making machine is arranged at one end of the wave water tank in the length direction, the wave absorbing device is arranged at the other end of the wave water tank in the length direction, the sample tube is arranged between the wave making machine and the wave absorbing device, the side opening of the sample tube is arranged opposite to the wave making machine, and the pressure sensor is arranged below the sample tube.
As an improvement of the scheme, the soil transverse erosion quality measuring device further comprises a sample placing frame for supporting the sample tube.
As an improvement of the scheme, the soil transverse erosion quality measuring device further comprises a sample clamping groove used for fixing the sample tube, and the sample clamping groove is fixed on the sample placing frame.
As an improvement of the scheme, the soil transverse erosion quality measuring device further comprises a sliding rail, and the sliding rail is arranged at a gap between the sample clamping groove and the sample tube.
As an improvement of the above solution, the step of performing the wave test on the soil sample in the sample tube by the soil lateral erosion quality measuring device includes: injecting water into the wave water tank until the height of the static water surface in the wave water tank is 1-2cm higher than the height of the bottom of the soil sample in the sample tube; the wave generator generates waves in the wave water tank according to preset wave parameters to wash the soil sample.
As an improvement of the above scheme, the step of calculating the soil lateral erosion rate of the soil sample according to the continuous pressure information comprises: and performing low-pass filtering on the continuous pressure information to remove wave signals and generating a rule that the quality of the residual soil sample in the sample tube changes along with time.
The implementation of the invention has the following beneficial effects:
according to the invention, the sampling tube and the sample tube are combined, and a unique soil sample transfer method is designed, so that the problem of inaccurate quality measurement caused by sample damage caused by carrying and transferring of a soil sample in the traditional wave water tank experiment process is solved, the loss of the sample in the experiment process is avoided, and the measurement accuracy is improved;
according to the invention, the pressure sensor technology is combined with the requirement of quantifying the quality of wave-scoured soil, the pressure sensor arranged below the soil sample is used for measuring the bottom pressure of the soil sample, the quality change of the soil sample in the erosion process is quantified, the problem of complex influence factors of the transverse erosion of the soil caused by waves is solved, and the method has important significance for realizing the wave-induced soil erosion research of coastal wetlands and reservoir areas and reducing the bank slope erosion;
according to the invention, by designing the sample tube with a unique structure, the opening at the side part of the soil sample in the sample tube can be contacted with the straight surface of the wave, so that the front edge land of the salt marsh (marsh) with vertical terrain can be better simulated;
the soil transverse erosion quality measuring device adopted by the invention has the advantages of simple structure, low cost and easy operation, can ensure the measurement precision, has small physical consumption during the measurement period, and is beneficial to batch operation and quick implementation.
Drawings
FIG. 1 is a flow chart of an embodiment of a soil lateral erosion quality measurement method of the present invention;
FIG. 2 is a schematic diagram of the structure of a sample tube according to the present invention;
FIG. 3 is a schematic structural view of a soil lateral erosion quality measuring apparatus according to the present invention;
fig. 4 is a schematic structural diagram of a sample tube, a sample holder, a sample slot, a slide rail and a pressure sensor according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a flow chart of an embodiment of the soil lateral erosion quality measuring method of the present invention, which includes:
and S101, collecting a soil sample through a sampling pipe.
It should be noted that the soil samples were taken from the front edge of salt marshes (swamps) with a slope close to vertical. In order to keep the structure of the soil sample stable in the erosion process, the PVC pipe is used as the sampling pipe, so that the PVC pipe is low in price, easy to obtain, light in weight and convenient for field sampling; meanwhile, in consideration of the sampling amount of the soil sample, the pipe diameter of the sampling pipe is 15cm, and the cylindrical soil sample with the depth larger than the preset depth can be collected, wherein the preset depth is preferably 15cm, but not limited by the preset depth.
Specifically, the step of collecting a soil sample through a sampling tube comprises:
(1) avoid arbor owner root position, erect the sampling pipe in soil surface.
(2) Knocking the sampling pipe to enable the sampling pipe to be vertically embedded into soil; preferably, the striking may be performed by a hammer.
In order to prevent the soil from being extruded and deformed in the knocking process and facilitate force application, a horizontal plate can be placed at the top of the sampling tube, so that the tube wall of the sampling tube is uniformly stressed and is kept vertically inserted into the soil surface downwards.
(3) When the degree of depth in the sampling pipe embedding soil is greater than preset degree of depth, dig out the soil around the sampling pipe, can dig out the soil around the sampling pipe with instruments such as spade, take out the soil sample that holds in sampling pipe and the sampling pipe.
And S102, transferring the soil sample in the sampling tube into the sample tube.
Before the wave test, a soil sample needs to be transferred into a sample tube from a sampling tube; as shown in fig. 2, the bottom of the sample tube is provided with a bottom opening 42 and the side wall of the sample tube is provided with a side opening 41 communicated with the bottom opening 42, and the bottom opening 42 and the side opening 41 are communicated with each other to form an erosion port with an L-shaped cross section. The side opening 41 is arranged towards one side of the wave, and the soil sample in the sample tube can contact the wave through the side opening 41, so that the front edge land of the vertical salt marsh (marsh) in the terrain can be better simulated; accordingly, the width of the side opening 41 may be 10 to 14cm, preferably 12cm, but is not limited thereto.
Specifically, the step of transferring the soil sample in the sampling tube into the sample tube comprises the following steps:
(1) vertically embedding a sample tube into a soil sample of the sampling tube, wherein the embedding depth is greater than the preset depth; the inner diameter of the sample tube is smaller than that of the sampling tube.
Because the sample tube needs to receive wave erosion in water for a long time, the invention adopts a durable and antirust stainless steel tube as the sample tube; meanwhile, one end of the stainless steel pipe embedded into the sampling pipe is sharpened by machining, so that the soil sample is deformed as little as possible in the transferring process. When the sample tube is transferred, the depth of the sample tube which is tightly attached to the inner wall of the sampling tube and vertically embedded downwards is larger than the preset depth, so that the operation is more convenient.
(2) Placing the sampling tube and the sample tube on a cylindrical table, and knocking the sampling tube to enable the sampling tube and a soil sample contained in the sampling tube to move relatively until the sampling tube and the soil sample are separated; the diameter of the cylinder is smaller than the inner diameter of the sampling tube.
(3) And intercepting the soil sample with the preset depth in the sample tube to form an erosion plane at the bottom opening and the side opening of the sample tube.
When a soil sample with the surface depth of a preset depth in the sample tube is intercepted, a cutter can be used for cutting off redundant parts and parts exceeding the opening, so that an erosion plane is formed at the bottom opening and the side opening of the sample tube, and the erosion plane is a plane directly acted by waves.
S103, arranging a soil transverse erosion quality measuring device, placing the sample tube in the soil transverse erosion quality measuring device, and arranging a pressure sensor below the sample tube.
As shown in fig. 3, the soil lateral erosion quality measuring device comprises a wave water tank 1, a wave generator 2, a wave absorption device 3 and a pressure sensor 5; the wave generator 2 is arranged at one end of the wave water tank 1 in the length direction, the wave absorption device 3 is arranged at the other end of the wave water tank 1 in the length direction, the sample tube 4 is arranged between the wave generator 2 and the wave absorption device 3, the side opening 41 of the sample tube 4 is arranged opposite to the wave generator 2, and the pressure sensor 5 is arranged below the sample tube 4.
It should be noted that the pressure sensor 5 is used for measuring the pressure information generated by the soil sample and the sample tube 4 under the action of the waves in real time. Before wave test, the mass of the sample is calculated according to the density and the volume of the soil sample, and then the measuring range and the measuring precision of the pressure sensor are estimated according to the soil erosion amount. In the present invention, a pressure sensor with a measuring range of 0 to 50N and a precision of 0.2N can be used according to the general experience of erosion experiments of clay soil samples, but not limited thereto.
Meanwhile, the wave absorbing device 3 can effectively prevent the wave water tank from generating reflected waves, and prevent the reflected waves and incident waves from being superposed to form standing waves.
As shown in fig. 4, the soil lateral erosion quality measuring device further comprises a sample placing frame 6 for supporting the sample tube 4.
Correspondingly, in order to improve the measuring accuracy, the soil transverse erosion quality measuring device further comprises a sample clamping groove 7 for fixing the sample tube 4, the sample clamping groove 7 is fixed on the sample placing frame 6, the circumferential flow of the sample tube 4 can be effectively prevented, and the measuring accuracy is guaranteed.
Further, the soil transverse erosion quality measuring device further comprises a slide rail 8, and the slide rail 8 is arranged at a gap between the sample clamping groove 7 and the sample tube 4. It should be noted that, by installing the slide rail 8 in the gap between the sample slot 7 and the sample tube 4, the soil sample in the sample tube 4 can be prevented from generating measurement displacement and lateral pressure, and the soil sample can only transmit pressure downwards, so that the measurement accuracy is improved.
Therefore, effective fixation of the sample tube can be realized through the sample placing frame 6, the sample clamping groove 7 and the sliding rail 8, the soil sample in the sample tube 4 is prevented from generating measurement displacement and pressure, and the measurement accuracy is guaranteed.
S104, performing wave test on the soil sample in the sample tube through the soil transverse erosion quality measuring device, and acquiring continuous pressure information in the wave test period through the pressure sensor in real time.
Specifically, the step of performing the wave test on the soil sample in the sample tube by the soil transverse erosion quality measuring device comprises:
(1) and injecting water into the wave water tank until the height of the static water surface in the wave water tank is 1-2cm higher than the height of the bottom of the soil sample in the sample tube.
Before working, water needs to be injected into the wave water tank, so that the height of the static water surface in the wave water tank is 1-2cm higher than the height of the bottom of the soil sample in the sample tube, the bottom of the soil sample is guaranteed to be submerged by water, and the soil sample is exposed under appropriate wave power. Preferably, the height of the still water surface is 1cm higher than the bottom height of the soil sample in the sample tube, but not limited thereto.
(2) The wave making machine generates waves in the wave water tank according to preset wave parameters to wash the soil sample.
When the wave scours the soil sample, continuous pressure information during the wave test is collected in real time by the pressure sensor, and the real-time performance is strong.
And S105, calculating the soil transverse erosion rate of the soil sample according to the continuous pressure information.
It should be noted that, at different flushing moments, the motion of the wave generator is stopped, and the reading of the pressure sensor when the waves are static reflects the quality of the soil sample and the sample tube at the moment; therefore, during the operation of the wave making machine, the law of the change of the quality of the residual soil sample in the sample tube along with the time can be obtained after the wave signals are removed by low-pass filtering according to the continuous pressure information collected by the pressure sensor.
Therefore, the invention combines the pressure sensor technology with the requirement of quantifying the quality of the soil scoured by the waves, and solves the problem of complex influence factors of the transverse erosion of the soil caused by the waves.
The invention is described in further detail below with reference to specific examples:
the method comprises the following steps: and collecting a columnar soil sample with the depth of more than 15cm by using a sampling pipe. Specifically, the method comprises the following steps: vertically erecting the sampling pipe on the soil surface, avoiding the main root position of the arbor, and vertically embedding the sampling pipe into the soil surface; knocking by a hammer to enable the sampling pipe to be vertically embedded into soil, preventing the soil from being extruded and deformed in the knocking process, and placing a horizontal wood plate on the sampling pipe to facilitate force application so as to enable the pipe wall of the sampling pipe to be uniformly stressed and keep vertically downwards inserted into the surface of the soil; when the sampling tube is embedded into soil to a depth of more than 15cm, the soil around the sampling tube is dug by using a tool such as a shovel, and the sampling tube and the soil sample contained in the sampling tube are taken out.
Step two: before the wave test, the columnar soil sample is transferred into a sample tube of a sample placing frame in the wave water tank through a sampling tube. Specifically, the method comprises the following steps: the sample tube is tightly attached to the inner wall of the sampling tube and is vertically embedded downwards by more than 15 cm; placing the whole of the sampling tube and the sample tube on a cylinder with the diameter slightly smaller than that of the sampling tube, and knocking the sampling tube by a hammer to enable the sampling tube and the contained soil to move relatively until the sampling tube and the contained soil are separated; finally, soil is left in the sample tube, soil with the surface depth of 15cm is taken, redundant parts and parts exceeding the opening are cut off by a cutter, so that a vertical plane is formed at the opening of the sample tube, and the plane is a plane on which waves directly act; the side, facing the waves, of the sample tube is 12cm wide, so that the soil in the sample tube is contacted with the waves; and placing the sample tube in the sample clamping groove for fixing.
Step three: and calculating the mass of the soil sample according to the density and the volume of the moist soil sample, and estimating the measuring range and the measuring precision of the pressure sensor according to the soil erosion amount. Specifically, the method comprises the following steps: according to the general erosion experiment experience of clay soil samples, a pressure sensor with the range of 0-50N and the precision of 0.2N is used.
Step four: and setting a wave making machine to generate waves with required parameters, and injecting water into the wave water tank to enable the static water level to be 1cm higher than the base of the soil sample.
Step five: during the operation of the wave making machine, wave signals are removed through low-pass filtering according to continuous pressure measurement values of the pressure sensor, and the change rule of the residual soil quality along with time can be obtained.
Therefore, the problem of soil sample damage possibly caused in the process of carrying and transferring the soil sample in the traditional wave water tank experiment process can be effectively solved, the loss of the soil sample in the experiment process is avoided, and the measurement accuracy is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. A soil transverse erosion quality measurement method is characterized by comprising the following steps:
collecting a soil sample through a sampling pipe;
transferring the soil sample in the sampling tube into a sample tube, wherein the bottom of the sample tube is provided with a bottom opening, the side wall of the sample tube is provided with a side opening communicated with the bottom opening, the bottom opening and the side opening of the sample tube can form an erosion plane through the sample tube, and the soil sample in the sample tube is contacted with a wave straight surface through the side opening to simulate a terrain-vertical salt front edge ground;
laying a soil transverse erosion quality measuring device, placing the sample tube in the soil transverse erosion quality measuring device, and arranging a pressure sensor below the sample tube; the soil transverse erosion quality measuring device comprises a wave water tank, a wave generator, a wave absorption device and a pressure sensor, wherein the wave generator is arranged at one end of the wave water tank in the length direction, the wave absorption device is arranged at the other end of the wave water tank in the length direction, the sample tube is arranged between the wave generator and the wave absorption device, a side opening of the sample tube is arranged opposite to the wave generator, and the pressure sensor is arranged below the sample tube; the soil transverse erosion quality measuring device also comprises a sample placing frame for supporting a sample tube, a sample clamping groove for fixing the sample tube and a sliding rail, wherein the sample clamping groove is fixed on the sample placing frame, and the sliding rail is arranged at a gap between the sample clamping groove and the sample tube;
performing wave test on the soil sample in the sample tube through the soil transverse erosion quality measuring device, and acquiring continuous pressure information in the wave test period in real time through the pressure sensor;
and calculating the soil transverse erosion rate of the soil sample according to the continuous pressure information.
2. The soil lateral erosion quality measurement method of claim 1 wherein the step of collecting a soil sample through a sampling tube comprises:
avoiding the position of a huge platy root of a mangrove forest of a main root of the arbor, and vertically erecting the sampling tube on the surface of soil;
knocking the sampling pipe to keep the sampling pipe vertically embedded in the soil;
when the depth of the sampling pipe embedded into the soil is larger than the preset depth, excavating the soil around the sampling pipe, and taking out the sampling pipe and the soil sample contained in the sampling pipe.
3. The soil lateral erosion quality measurement method of claim 2, wherein a horizontal plate is placed on top of the sampling tube when the sampling tube is knocked, and the sampling tube is kept vertically embedded in the soil by knocking the horizontal plate.
4. The soil lateral erosion quality measurement method of claim 1 wherein the step of transferring the soil sample in the sample tube into the sample tube comprises:
vertically embedding the sample tube into the soil sample of the sampling tube, wherein the embedding depth is greater than a preset depth, and the inner diameter of the sample tube is smaller than that of the sampling tube;
placing the sampling tube and the sample tube on a cylindrical table, knocking the sampling tube to enable the sampling tube and a soil sample contained in the sampling tube to move relatively until the sampling tube and the soil sample are separated, wherein the diameter of the cylindrical table is smaller than the inner diameter of the sampling tube;
and intercepting the soil sample with the preset depth in the sample tube to form an erosion plane at the bottom opening and the side opening of the sample tube.
5. The soil lateral erosion quality measurement method of claim 1, wherein the step of performing a wave test on the soil sample in the sample tube by the soil lateral erosion quality measurement device comprises:
injecting water into the wave water tank until the height of the static water surface in the wave water tank is 1-2cm higher than the height of the bottom of the soil sample in the sample tube;
the wave generator generates waves in the wave water tank according to preset wave parameters to wash the soil sample.
6. The soil lateral erosion quality measurement method of claim 1 wherein the step of calculating the soil lateral erosion rate of the soil sample from the continuous pressure information comprises: and performing low-pass filtering on the continuous pressure information to remove wave signals and generating a rule that the quality of the residual soil sample in the sample tube changes along with time.
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| US6084393A (en) * | 1999-10-15 | 2000-07-04 | U.S. Army Corps Of Engineers As Represented By The Secretary Of The Army | Scour probe assembly |
| CN2869842Y (en) * | 2006-02-17 | 2007-02-14 | 中国科学院遗传与发育生物学研究所 | Farm-field soil-smaple collector |
| CN108344653A (en) * | 2018-04-19 | 2018-07-31 | 三峡大学 | Test the device and method that the soil body resists scouring capability |
| CN109580409A (en) * | 2018-12-03 | 2019-04-05 | 三峡大学 | A kind of device and method for testing the soil body or soft rock resistance wave erosion ability |
| CN109781569A (en) * | 2019-03-15 | 2019-05-21 | 云南大学 | A kind of reservoir drawdown band abrasion monitoring device |
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