CN215574511U - Permeability coefficient measuring device - Google Patents
Permeability coefficient measuring device Download PDFInfo
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- CN215574511U CN215574511U CN202120916918.6U CN202120916918U CN215574511U CN 215574511 U CN215574511 U CN 215574511U CN 202120916918 U CN202120916918 U CN 202120916918U CN 215574511 U CN215574511 U CN 215574511U
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Abstract
The utility model relates to a permeability coefficient measuring device, which comprises a measuring main body, wherein a pressure measuring port of the measuring main body is connected with a pressure measuring pipe; the permeability coefficient measuring device also comprises an image acquisition component, a data acquisition component and a data processing component, wherein the image acquisition component is used for acquiring image information of the position of a water head in the pressure measuring pipe; a weighing means for weighing the weight of the discharged water discharged from the water outlet of the measuring body; and the measuring host is simultaneously connected with the image acquisition component and the weighing component, and measures the permeability coefficient of the soil body in the measuring main body according to the image information of the position of the water head in the piezometer tube and the water outlet weight of the measuring main body. The permeability coefficient measuring device can accurately measure the dynamic relation between the permeability coefficient and the permeability, thereby measuring the soil body permeability coefficient with higher precision.
Description
Technical Field
The utility model relates to the technical field of permeability coefficient measurement, in particular to a permeability coefficient measuring device.
Background
The permeability coefficient of the soil is an important parameter for researching the properties of the soil, is widely applied to multiple subjects such as geotechnical engineering, environmental engineering, soil engineering and the like, relates to the fields of engineering construction, environment and agriculture, and has a very wide application range. In the engineering field, the permeability coefficient is used for analyzing the water leakage of a channel, the drainage problem during foundation pit excavation, the drainage problem of muddy soil in a coastal region, the problem of influence of precipitation on the stability of a side slope and the like. In the environmental field, permeability coefficients are used to analyze the problems of seepage prevention of hazardous waste landfills, migration of contaminants in the soil, and blockage of bioretention facilities. In the agricultural field, permeability coefficients are applied to analyze the problem of soil moisture loss. In this regard, it is important to design a method or apparatus for accurately and rapidly measuring permeability coefficient.
A permeability coefficient measuring method is provided in the national standard GB/T50123-2019 geotechnical test method Standard, the method calculates the pore water pressure by manually reading the water head positions of pressure measuring tubes at different depths, and calculates the seepage flow rate by reading the permeability through a measuring cylinder. However, in the process of analyzing practical problems, it is found that the permeability coefficient changes along with the permeability, because soil particles (especially fine particles in soil) can migrate along with the action of a water head, so that the permeability coefficient changes along with the permeability. The following difficulties and disadvantages exist in analyzing the change of the permeability coefficient along with the permeability by adopting the existing permeability coefficient measuring method: (1) if the dynamic relation between the permeability coefficient and the permeability needs to be analyzed, the data of all the pressure measuring pipes need to be recorded at the same time (the pressure measuring pipe data is the position data of the pressure measuring pipe water head), but the manual reading has time difference in the process of reading the water heads of all the pressure measuring pipes, and the data of all the pressure measuring pipes can not be recorded at the same time in a strict sense; (2) because the data is read manually, certain errors inevitably exist, and the measurement precision is reduced; (3) the water heads of the piezometer tubes are recorded, and simultaneously, the permeation quantity is required to be recorded, the workload of reading at the same moment is further increased by measuring through a measuring cylinder in the prior art, and the reliability of the dynamic coefficient measuring result is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the problem that the dynamic relationship between the permeability coefficient and the permeability cannot be accurately measured because all pressure measuring pipe data and permeability data cannot be recorded simultaneously in the prior art, and provide a permeability coefficient measuring device which can accurately measure the dynamic relationship between the permeability coefficient and the permeability, thereby measuring the soil body permeability coefficient with higher precision.
In order to solve the technical problem, the utility model provides a permeability coefficient measuring device, which comprises a measuring main body, wherein a pressure measuring port of the measuring main body is connected with a pressure measuring pipe, and the permeability coefficient measuring device is characterized in that: the permeability coefficient measuring device further comprises a filter for filtering the water,
the image acquisition component is used for acquiring image information of the position of a water head in the pressure measuring pipe;
a weighing means for weighing the weight of the discharged water discharged from the water outlet of the measuring body;
and the measuring host is simultaneously connected with the image acquisition component and the weighing component, and measures the permeability coefficient of the soil body in the measuring main body according to the image information of the position of the water head in the piezometer tube and the water outlet weight of the measuring main body.
In one embodiment of the utility model, a water head position identification component is arranged in the piezometer tube.
In one embodiment of the present invention, the water head position identification member is provided as red marking ink that is dropped into the pressure tube.
In one embodiment of the utility model, the piezometric tube is supported on a back plate, and a marking line is arranged on the back plate and positioned around the piezometric tube.
In an embodiment of the present invention, the plurality of pressure measuring tubes included in the measurement main body are all supported on the back plate, and the plurality of pressure measuring tubes are regularly arranged.
In one embodiment of the utility model, the image acquisition component comprises a camera which periodically acquires image information of the position of the water head in the pressure measuring pipe.
In an embodiment of the present invention, the image capturing component further includes a light supplement device, and the light supplement device is configured to project a light source to the direction of the piezometric tube.
In one embodiment of the utility model, the weighing means comprise an electronic scale which continuously weighs the outlet water weight of the measuring body.
In one embodiment of the utility model, the data output interface of the electronic scale is connected with the measuring host, and the measuring host periodically acquires the weighing data of the electronic scale.
In one embodiment of the utility model, the permeability coefficient measuring device further comprises a display component, wherein the display component is connected with the measuring host and is used for displaying the permeability coefficient of the soil body in the measuring body on line.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the permeability coefficient measuring device comprises an image acquisition component, a data acquisition component and a data processing component, wherein the image acquisition component is used for acquiring image information of the position of a water head in a pressure measuring pipe; a weighing member for measuring a weight of the discharged water discharged from the water outlet of the measuring body; the measuring host is connected with the image acquisition component and the weighing component at the same time, the measuring host identifies the position of the water head in the pressure tube according to the image information of the position of the water head in the pressure tube, calculates the seepage quantity and the seepage velocity according to the water outlet weight of the measuring main body, finally calculates the seepage coefficient of the soil body in the measuring main body according to the position of the water head, the seepage quantity and the seepage velocity, and measures the dynamic relation between the seepage coefficient and the seepage quantity. The permeability coefficient measuring device can accurately measure the dynamic relation between the permeability coefficient and the permeability, thereby measuring the soil body permeability coefficient with higher precision.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a block diagram of a permeability coefficient measuring apparatus according to a preferred embodiment of the present invention;
fig. 2 is a structural view of a measuring body in the permeability coefficient measuring apparatus shown in fig. 1.
The specification reference numbers indicate:
2-measuring a main body, 4-a piezometer tube, 6-a water head position identification component;
10-an image acquisition component;
20-a weighing component;
30-a measurement host;
40-back panel, 41-mark line;
50-display means.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The utility model discloses a permeability coefficient measuring device, which is shown by reference to fig. 2 and comprises a measuring main body 2 consisting of a cylinder body, a water inlet mechanism, a water drainage mechanism and a pressure measuring pipe 4, wherein the cylinder body is provided with a water inlet, a water outlet and a side pressure port, soil mass needing to measure the permeability coefficient is filled into the cylinder body, the water inlet mechanism and the water drainage mechanism are respectively connected with the water inlet and the water outlet of the cylinder body, water is drained from the water outlet while water is fed into the cylinder body, the pressure measuring pipe 4 is connected with the pressure measuring port, water permeating into the soil mass enters the pressure measuring pipe 4 under the action of pressure, a hydraulic slope i can be measured according to the position of a water head in the pressure measuring pipe 4, and the hydraulic slope i represents the energy loss on a unit seepage path; the seepage velocity upsilon of the soil body is measured and calculated through measuring the water yield at the drainage port, when the seepage velocity upsilon represents who takes place the seepage in the soil body, the flow of unit seepage cross section flows through in unit time, and after the hydraulic slope drop i and the seepage velocity upsilon are measured and calculated, the soil body permeability coefficient k is calculated based on the following formula 1:
referring to fig. 1, the permeability coefficient measuring apparatus further includes an image collecting unit 10, configured to collect image information of a position of a water head in the pressure tube; a weighing means 20 for weighing the weight of the discharged water discharged from the outlet of the measuring body; the measuring host 30 is connected with the image acquisition component 10 and the weighing component 20 at the same time, and the measuring host 30 measures the permeability coefficient of the soil body in the measuring main body 2 according to the image information of the water head position in the piezometric tube 4 and the water outlet weight of the measuring main body 2.
The permeability coefficient measuring device comprises an image acquisition component 10, a pressure measuring pipe 4 and a permeability coefficient measuring device, wherein the image acquisition component is used for acquiring image information of a water head position in the pressure measuring pipe 4; a weighing means 20 for measuring the weight of the discharged water discharged from the water outlet of the measuring body 2; the measuring host 30 is connected with the image acquisition component 10 and the weighing component 20 at the same time, the measuring host 30 identifies the position of the water head in the pressure measuring tube 4 according to the image information of the position of the water head in the pressure measuring tube 4, calculates the seepage quantity and the seepage velocity according to the water outlet weight of the measuring main body 2, calculates the seepage coefficient of the soil body in the measuring main body 2 according to the position of the water head, the seepage quantity and the seepage velocity, and measures the dynamic relation between the seepage coefficient and the seepage quantity. The permeability coefficient measuring device can accurately measure the dynamic relation between the permeability coefficient and the permeability, thereby measuring the soil body permeability coefficient with higher precision.
The permeability coefficient measuring device is characterized in that the image acquisition part 10 can acquire water head positions of a plurality of groups of pressure measuring pipes at the same time, the weighing part 20 can acquire the water outlet weight synchronously with the image acquisition part 10, the problem of synchronism in the reading process is completely solved, all data are technically guaranteed to be read at the same time, and a way is provided for analyzing the permeability coefficient and the dynamic relation between the permeability coefficient and the permeability. Simultaneously, can satisfy the demand that arranges more piezometric tubes in the measurement process, compare in traditional manual reading, not only reduce experimenter's work load, because experimental data reads through image recognition is automatic moreover, the accuracy is higher. On the other hand, the image acquisition component 10 automatically acquires data, the data reading frequency is higher, namely, the data acquisition rate is improved, and the permeability coefficient measurement under the working condition that the permeability coefficient change is faster is favorably analyzed.
In order to easily identify the water head position, a water head position identification component 6 is arranged in the piezometer tube 4, and the water head position can be quickly and accurately identified through the water head position identification component 6; specifically, the water head position identification component 6 is set as red marking ink, the red marking ink is dripped into the piezometer tube, low-viscosity (placing the ink to be stuck on the wall of the piezometer tube) and low-density (making the ink float on the water surface) red oil are preferably used, and the position of the piezometer tube water head is easy to identify.
Referring to fig. 2, the piezometric tube 4 is supported on a back plate 40, a marking line 41 is arranged on the back plate 40 around the piezometric tube 4, and the marking line 41 is arranged, so that subsequent edge detection, quadrilateral correction and distance reference are facilitated, and the relative position of a water head is accurately obtained. When a plurality of groups of pressure measuring pipes 4 are used, the plurality of groups of pressure measuring pipes are supported on the back plate 40 and are regularly arranged.
Referring to fig. 1, the image collecting component includes a camera and a light supplementing device, the camera periodically collects image information of a water head position in the pressure measuring pipe 4, the image information shot by the camera is transmitted to the measuring host 30, and in one mode, a shooting period of the camera is actively adjusted to periodically collect the image information; in another mode, the camera continuously captures images, and the measurement host 30 periodically records image information to periodically acquire image information. In order to avoid the influence of external ambient light change on image acquisition and image recognition, the image acquisition component 10 further includes a light supplement device, and the light supplement device is used for supplementing light to the projection light source in the direction of the piezometric tube 4.
The weighing part 20 comprises an electronic scale, in the actual use process, the water outlet of the measuring body 2 is connected to a water storage device through a water pipe, the water storage device is arranged on the electronic scale, and the water yield in the water storage device and the change of the water yield are continuously weighed on line. The data output interface of the electronic scale is connected with the measuring host 30, and the measuring host 30 periodically acquires the weighing data of the electronic scale. The period for acquiring the weighing data and the period for acquiring the image information can be controlled to be synchronous and consistent, so that the water head position and the seepage quantity can be synchronously acquired, and higher measurement precision is ensured.
The permeability coefficient measuring device further comprises a display component 50, wherein the display component 50 is connected with the measuring host 30 and is used for displaying the permeability coefficient of the soil body in the measuring main body 2 on line and displaying the dynamic change relation between the permeability coefficient and the permeability on line.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. The utility model provides a permeability coefficient measuring device, includes the measurement main part, the piezometric pipe is connected to the piezometric mouth of measurement main part, its characterized in that: the permeability coefficient measuring device further comprises a filter for filtering the water,
the image acquisition component is used for acquiring image information of the position of a water head in the pressure measuring pipe;
a weighing means for weighing the weight of the discharged water discharged from the water outlet of the measuring body;
and the measuring host is simultaneously connected with the image acquisition component and the weighing component, and measures the permeability coefficient of the soil body in the measuring main body according to the image information of the position of the water head in the piezometer tube and the water outlet weight of the measuring main body.
2. The permeability coefficient measuring apparatus according to claim 1, wherein: and a water head position identification component is arranged in the piezometer tube.
3. The permeability coefficient measuring apparatus according to claim 2, wherein: the water head position identification component is set to be red marking ink, and the red marking ink is dripped into the piezometer tube.
4. The permeability coefficient measuring apparatus according to claim 1, wherein: the pressure measuring pipe is supported on the back plate, and marking lines are arranged on the back plate and positioned around the pressure measuring pipe.
5. The permeability coefficient measuring apparatus according to claim 4, wherein: the plurality of pressure measuring pipes contained in the measuring main body are supported on the back plate and are regularly arranged.
6. The permeability coefficient measuring apparatus according to claim 1, wherein: the image acquisition component comprises a camera, and the camera periodically acquires image information of the position of the water head in the pressure measuring pipe.
7. The permeability coefficient measuring apparatus according to claim 6, wherein: the image acquisition component further comprises a light supplementing device, and the light supplementing device is used for projecting a light source to the direction of the piezometric tube.
8. The permeability coefficient measuring apparatus according to claim 1, wherein: the weighing component comprises an electronic scale which continuously weighs the water outlet weight of the measuring main body.
9. The permeability coefficient measuring apparatus according to claim 8, wherein: and the data output interface of the electronic scale is connected with the measuring host, and the measuring host periodically acquires the weighing data of the electronic scale.
10. The permeability coefficient measuring apparatus according to any one of claims 1 to 9, wherein: the permeability coefficient measuring device further comprises a display component, wherein the display component is connected with the measuring host and is used for displaying the permeability coefficient of the soil body in the measuring main body on line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120916918.6U CN215574511U (en) | 2021-04-29 | 2021-04-29 | Permeability coefficient measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120916918.6U CN215574511U (en) | 2021-04-29 | 2021-04-29 | Permeability coefficient measuring device |
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| Publication Number | Publication Date |
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| CN215574511U true CN215574511U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120916918.6U Active CN215574511U (en) | 2021-04-29 | 2021-04-29 | Permeability coefficient measuring device |
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2021
- 2021-04-29 CN CN202120916918.6U patent/CN215574511U/en active Active
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