CN210954026U - Experimental determination device for soil body disintegration characteristics under different flow velocity conditions - Google Patents
Experimental determination device for soil body disintegration characteristics under different flow velocity conditions Download PDFInfo
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- CN210954026U CN210954026U CN201921810238.5U CN201921810238U CN210954026U CN 210954026 U CN210954026 U CN 210954026U CN 201921810238 U CN201921810238 U CN 201921810238U CN 210954026 U CN210954026 U CN 210954026U
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Abstract
The utility model relates to an experimental determination device of soil body disintegration characteristic under different velocity of flow conditions, including two sets of survey modules, every survey module all includes fixed bolster, graduated flask, porous filter plate, inlet tube, outlet pipe for bearing the weight of the sample, sets up first governing valve and first flowmeter on the inlet tube, sets up second governing valve and second flowmeter, collection container, dynamometry unit and the host computer on the outlet pipe. Adopt the utility model discloses a different water velocity of flow can be simulated to the device, provides the hardware device for the survey of disintegration characteristic.
Description
Technical Field
The utility model relates to a civil engineering design field, especially an experimental determination device of soil body disintegration characteristic under different velocity of flow conditions.
Background
The disintegration property of soil, also called soil wettability, refers to the property of soil disintegration caused by structural connection and strength loss among soil particles after a soil sample is wetted by water, and soil disintegration characteristic curves are generally adopted to measure the time, disintegration speed and disintegration quantity required by soil disintegration.
The disintegration characteristic of the soil body, especially the disintegration characteristic of a large amount of granite sediment soil that the hilly landform of southeast coastal deposition exists, is concerned with the long-term stability of engineering structure and soil body to and form different speed's surface runoff under the typhoon rainfall condition and lead to the large scale volume of surperficial granite sediment soil to disintegrate, and then take place soil body landslide geological disasters.
However, the disintegration characteristics of the soil body cannot be accurately measured due to the problems of difficult field measurement and the like, the existing experimental device has poor reducibility, and cannot keep consistent with the field water flow speed, so that the measurement result is inaccurate.
Disclosure of Invention
In view of this, the utility model aims at providing an experimental determination device of soil body disintegration characteristic under the different velocity of flow condition can provide the hardware device for the survey of disintegration characteristic.
The utility model discloses a following scheme realizes: an experimental determination device for soil body disintegration characteristics under different flow velocity conditions comprises two sets of determination modules, wherein each determination module comprises a fixed support, a measuring cylinder, a porous filter plate for bearing a sample, a water inlet pipe, a water outlet pipe, a first speed regulating valve and a first flowmeter which are arranged on the water inlet pipe, a second speed regulating valve and a second flowmeter which are arranged on the water outlet pipe, a collection container, a force measuring unit and an upper computer;
the force measuring unit is erected above the measuring cylinder through a fixed bracket, the force measuring end of the force measuring unit is connected with the porous filter plate, and the signal output end of the force measuring unit is connected with an upper computer and used for measuring the weight of the porous filter plate and a load of the porous filter plate and transmitting the measurement result to the upper computer;
the first speed regulating valve and the second speed regulating valve are used for keeping the water level in the measuring cylinder fixed according to the set flow rate and completely submerging the sample, and the collecting container is connected with the water outlet pipe and used for collecting experimental wastewater.
Further, the device also comprises a purification device arranged at the bottom of the measuring cylinder.
Further, the purification device is an adsorption material, including but not limited to a reverse osmosis screen or polyacrylamide.
Furthermore, the force measuring units in the two sets of measuring modules are a dynamometer and an electronic balance respectively.
Preferably, the porous filter plate is a circular flat plate, and a circular hole is formed in the circular flat plate.
Based on the experimental determination device for soil body disintegration characteristics under different flow speed conditions, the following determination experiments can be carried out, and the experimental determination device comprises the following steps:
obtaining soil samples of a measuring place, and determining different surface runoff flow velocities V of the measuring place under different rainfall conditions1，V2… … Vn, for each flow velocity ViRespectively adopting two sets of measuring modules to carry out primary measurement, and respectively defining the primary measurement and the secondary measurement;
the first determination is as follows:
the force measuring unit adopts a dynamometer, a soil sample is placed on the porous filter plate, and a change value delta F of the force measuring value before and after the soil sample is placed and a force measuring value F at the beginning of a test after the soil sample is placed are obtained through the dynamometer0(ii) a Opening the first speed regulating valve and the second speed regulating valve, and keeping the upper water surface of the measuring cylinder at a constant water level corresponding to the flow velocity V in the measuring cylinder by regulating the water flow speeds of the first speed regulating valve and the second speed regulating valvei(ii) a According to a certain time interval, the upper computer records the reading F of the dynamometer at the moment t in real timetUntil the soil sample completely passes through the porous filter plate;
calculating to obtain the corresponding flow velocity V of the sample of the soil body at the t moment in the current measuring unitiExperimental disintegration amount of (A)t：
The second determination is as follows:
the force measuring unit adopts an electronic balance, a soil body sample is placed on the porous filter plate, the change value delta M of readings of the electronic balance before and after the soil body sample is placed in the porous filter plate and the reading M of the electronic balance at the beginning of a test after the soil body sample is placed in the porous filter plate are obtained through the electronic balance0(ii) a Opening the first speed regulating valve and the second speed regulating valve, and keeping the upper water surface of the measuring cylinder at a constant water level corresponding to the flow velocity V in the measuring cylinder by regulating the water flow speeds of the first speed regulating valve and the second speed regulating valvei(ii) a According to a certain time interval, the upper computer records the reading M of the electronic balance at the moment t in real timetUntil the soil sample completely passes through the porous filter plate;
calculating to obtain the corresponding flow velocity V of the sample of the soil body at the t moment in the current measuring unitiExperimental disintegration amount of (B)t：
Flow velocity ViThe corresponding soil mass disintegration amount is as follows:
furthermore, an adsorption and purification material is placed at the bottom of the measuring cylinder, on one hand, sewage generated in the experimental process is treated, and on the other hand, the normal work of the speed regulating valve is prevented from being interfered by the blockage of the water outlet pipe by the mud content in water.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a design governing valve and flowmeter on inlet tube and outlet pipe, can be convenient for monitor intake and play water velocity, can provide the hardware device for the survey of disintegration characteristic. And meanwhile, the bottom of the measuring cylinder is provided with an adsorption material, so that sewage can be purified, and the water outlet pipe is prevented from being blocked.
Drawings
Fig. 1 is a schematic structural diagram of a first measurement module according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second measurement module according to an embodiment of the present invention.
In the figure, 1 is a fixed support, 2 is a water inlet pipe, 3 is a first speed regulating valve or a second speed regulating valve, 4 is a first flowmeter or a second flowmeter, 5 is a dynamometer, 6 is an upper computer, 7 is a measuring cylinder, 8 is a soil sample, 9 is a porous filter plate, 10 is an adsorbing material, 11 is a water outlet pipe, 12 is a collecting container, and 13 is an electronic level.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
The embodiment provides an experimental determination device for soil body disintegration characteristics under different flow velocity conditions, which comprises two sets of determination modules, wherein each determination module comprises a fixed support, a measuring cylinder, a porous filter plate for bearing a sample, a water inlet pipe, a water outlet pipe, a first speed regulating valve and a first flowmeter which are arranged on the water inlet pipe, a second speed regulating valve and a second flowmeter which are arranged on the water outlet pipe, a collection container, a force measuring unit and an upper computer;
the force measuring unit is erected above the measuring cylinder through a fixed bracket, the force measuring end of the force measuring unit is connected with the porous filter plate, and the signal output end of the force measuring unit is connected with an upper computer and used for measuring the weight of the porous filter plate and a load of the porous filter plate and transmitting the measurement result to the upper computer;
the first speed regulating valve and the second speed regulating valve are used for keeping the water level in the measuring cylinder fixed according to the set flow rate and completely submerging the sample, and the collecting container is connected with the water outlet pipe and used for collecting experimental wastewater.
In this embodiment, the device further comprises a purification device arranged at the bottom of the measuring cylinder.
In this embodiment, the purification device is an adsorbent material, including but not limited to a reverse osmosis screen or polyacrylamide.
In this embodiment, the force measuring units in the two sets of measuring modules are a force meter and an electronic balance, respectively.
Preferably, in this embodiment, the porous filter plate is a circular flat plate, and the flat plate is provided with a circular hole. The collection container is a plastic container or a glass container. The measuring cylinder is a vertical measuring cylinder. The upper computer is a computer.
The embodiment also provides a method for testing the device based on the soil disintegration characteristics under different flow speed conditions, which comprises the following steps:
obtaining soil samples of a measuring place, and determining different surface runoff flow velocities V of the measuring place under different rainfall conditions1，V2… … Vn (in particular, this embodiment determines the set of flow rates for different hilly terrain surface runoff flow rates based on historical rainfall statistics at the southeast coastal weather station), for each flow rate ViRespectively adopting two sets of measuring modules to carry out primary measurement, and respectively defining the primary measurement and the secondary measurement;
as shown in fig. 1, the first measurement is:
the force measuring unit adopts a dynamometer to obtain the force in the experimental process, a soil sample is placed on the porous filter plate, and the dynamometer is used for obtaining the change value delta F of the force measurement value before and after the soil sample is placed and the force measurement value F when the test is started after the soil sample is placed0(ii) a Opening the first speed regulating valve and the second speed regulating valve, and keeping the upper water surface of the measuring cylinder at a constant water level corresponding to the flow velocity V in the measuring cylinder by regulating the water flow speeds of the first speed regulating valve and the second speed regulating valvei(ii) a According to a certain time interval (30s or 1min), the upper computer records the reading F of the dynamometer at the moment t in real timetUntil the soil sample completely passes through the porous filter plate;
calculating to obtain the corresponding flow velocity V of the sample of the soil body at the t moment in the current measuring unitiExperimental disintegration amount of (A)t：
As shown in fig. 2, the second assay is:
the force measuring unit adopts an electronic balance to obtain the mass in the experimental process, a soil sample is placed on the porous filter plate, the change value delta M of the readings of the electronic balance before and after the soil sample is placed is obtained through the electronic balance, and the test is carried out after the soil sample is placedElectronic balance reading M at the beginning0(ii) a Opening the first speed regulating valve and the second speed regulating valve, and keeping the upper water surface of the measuring cylinder at a constant water level corresponding to the flow velocity V in the measuring cylinder by regulating the water flow speeds of the first speed regulating valve and the second speed regulating valvei(ii) a According to a certain time interval (30s or 1min), the upper computer records the reading M of the electronic balance at the moment t in real timetUntil the soil sample completely passes through the porous filter plate;
calculating to obtain the corresponding flow velocity V of the sample of the soil body at the t moment in the current measuring unitiExperimental disintegration amount of (B)t：
Flow velocity ViThe corresponding soil mass disintegration amount is as follows:
in this embodiment, the bottom of graduated flask is placed and is adsorbed purifying material, and on the one hand will change the sewage that produces in the experimentation, and on the other hand prevents that the mud content in aquatic from blockking up the outlet pipe and disturbing speed valve's normal work.
Preferably, in this embodiment, the porous filter plate is a circular flat plate, and the circular flat plate is provided with a circular hole.
In particular, in this embodiment, the manufacturing of the soil sample specifically includes: the in-situ soil of the hilly landform of the southeast coastal engineering field is taken, and the soil is immediately sealed by a film after sampling, so that the natural characteristics of the soil body are maintained. Cube samples with 5cm side lengths were prepared in the laboratory by means of a soil cutter.
It is worth mentioning that the utility model protects a hardware structure, as for the measuring method does not require protection. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.
Claims (5)
1. An experimental determination device for soil body disintegration characteristics under different flow velocity conditions is characterized by comprising two sets of determination modules, wherein each determination module comprises a fixed support, a measuring cylinder, a porous filter plate for bearing a sample, a water inlet pipe, a water outlet pipe, a first speed regulating valve and a first flowmeter which are arranged on the water inlet pipe, a second speed regulating valve and a second flowmeter which are arranged on the water outlet pipe, a collection container, a force measuring unit and an upper computer;
the force measuring unit is erected above the measuring cylinder through a fixed bracket, the force measuring end of the force measuring unit is connected with the porous filter plate, and the signal output end of the force measuring unit is connected with an upper computer and used for measuring the weight of the porous filter plate and a load of the porous filter plate and transmitting the measurement result to the upper computer;
the first speed regulating valve and the second speed regulating valve are used for keeping the water level in the measuring cylinder fixed according to the set flow rate and completely submerging the sample, and the collecting container is connected with the water outlet pipe and used for collecting experimental wastewater.
2. The experimental determination device for the disintegration characteristics of soil body under different flow speed conditions, according to claim 1, further comprising a purification device disposed at the bottom of the measuring cylinder.
3. The experimental apparatus for determining disintegration characteristics of soil body under different flow rate conditions as claimed in claim 2, wherein said cleaning means is an absorbent material including but not limited to reverse osmosis filter screen or polyacrylamide.
4. The experimental determination device for soil body disintegration characteristics under different flow rate conditions of claim 2, wherein the force measuring units in the two sets of determination modules are a force gauge and an electronic balance respectively.
5. The device for experimental determination of soil disintegration characteristics at different flow rates according to claim 1, wherein said porous filter plate is a circular flat plate with circular holes.
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| CN110632278A (en) * | 2019-10-25 | 2019-12-31 | 福州大学 | Experimental determination device and method for soil body disintegration characteristics under different flow velocity conditions |
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| CN110632278A (en) * | 2019-10-25 | 2019-12-31 | 福州大学 | Experimental determination device and method for soil body disintegration characteristics under different flow velocity conditions |
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