CN216560182U - Device capable of automatically measuring and reading permeability coefficient of geotextile - Google Patents
Device capable of automatically measuring and reading permeability coefficient of geotextile Download PDFInfo
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- CN216560182U CN216560182U CN202122836901.2U CN202122836901U CN216560182U CN 216560182 U CN216560182 U CN 216560182U CN 202122836901 U CN202122836901 U CN 202122836901U CN 216560182 U CN216560182 U CN 216560182U
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Abstract
The utility model discloses a device capable of automatically measuring and reading permeability coefficient of geotechnical cloth, which comprises: the device comprises a permeator, a filter and a controller, wherein a geotextile sample is arranged in the middle of the permeator to divide the permeator into an upstream chamber and a downstream chamber, the upstream chamber is communicated with a water source, and an overflow port is arranged on the downstream chamber; one end of the upstream water level pipe is communicated with an upstream water level communication port on the upstream cavity, and the other end of the upstream water level pipe is provided with an upstream water level sensor; one end of the downstream water level pipe is communicated with a downstream water level communication port on the downstream cavity, and the other end of the downstream water level pipe is provided with a downstream water level sensor; one end of the water outlet pipe is arranged below the overflow port, the other end of the water outlet pipe is communicated with the water outlet pipe, and a flow sensor for measuring the water flow velocity passing through the geotextile sample is arranged in the water outlet pipe; and the intelligent controller is respectively connected with the upstream water level sensor, the downstream water level sensor and the flow sensor.
Description
Technical Field
The application relates to the technical field of geotechnical cloth vertical permeability coefficient detection, in particular to a device capable of automatically measuring and reading geotechnical cloth permeability coefficient.
Background
Geotextiles, also known as geotextiles, are water permeable geosynthetic materials made of synthetic fibers by needling or weaving. The geotextile mainly plays various functions of reverse filtration, drainage, isolation, reinforcement, protection, containment and the like in engineering, wherein the main index for determining the drainage performance is a vertical permeability coefficient, and the vertical permeability coefficient of the geotextile refers to the water flow passing through the geotextile in unit area under unit time and unit hydraulic gradient, and the unit is cm/s. The calculation formula is as follows:
in the formula, k20The vertical permeability coefficient at 20 ℃ of the sample is cm/s; v is the amount of permeated water in cm3(ii) a Delta is the sample thickness, cm; a is the water passing area of the sample in cm2(ii) a Δ h is the head difference, cm; t is the time for measuring the water volume V, s; eta is the water temperature correction coefficient.
According to the formula, relevant parameters such as upstream and downstream water levels, water permeation amount, water measurement time and the like are required to be measured when the vertical permeability coefficient of the geotextile is detected.
In the process of implementing the utility model, the inventor finds that at least the following problems exist in the prior art:
according to the relevant provisions of the geosynthetic test protocol (SL235), a curve relating the permeation flow rate to the hydraulic gradient is prepared, and the test results in the linear range are taken, so that 5 sets of data are required to be determined for a single sample. And taking the average value of the test values of the 5 samples as the vertical permeability coefficient of the geotextile. At present, the vertical permeability coefficient of the geotextile is obtained by manually reading the upstream and downstream water levels and measuring the amount of water permeating in a certain time by using a measuring cylinder and a stopwatch. Therefore, the detection process involves recording and processing of a large amount of original data, and is extremely complicated, error-prone and extremely low in detection efficiency.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims to provide a device capable of automatically measuring and reading permeability coefficients of geotextiles, so as to solve the technical problem that a large amount of original data needs to be manually recorded and manually calculated in the related technology.
According to a first aspect of the embodiments of the present application, there is provided an apparatus for automatically measuring and reading permeability coefficient of geotextile, comprising:
the device comprises a permeator, a filter and a controller, wherein a geotextile sample is arranged in the middle of the permeator to divide the permeator into an upstream chamber and a downstream chamber, the upstream chamber is communicated with a water source, and an overflow port is arranged on the downstream chamber;
one end of the upstream water level pipe is communicated with an upstream water level communication port on the upstream chamber, and the other end of the upstream water level pipe is provided with an upstream water level sensor;
one end of the downstream water level pipe is communicated with a downstream water level communication port on the downstream cavity, and the other end of the downstream water level pipe is provided with a downstream water level sensor;
one end of the water outlet pipe is arranged below the overflow port, the other end of the water outlet pipe is communicated with a water outlet pipe, and a flow sensor for measuring the water flow velocity passing through the geotextile sample is arranged in the water outlet pipe; and
and the intelligent controller is respectively connected with the upstream water level sensor, the downstream water level sensor and the flow sensor.
Further, still include steady flood peak water tank, steady flood peak water tank includes inner tube and urceolus, the top of inner tube with the urceolus is linked together, the water source with the input of inner tube is linked together, the output of inner tube with the upper reaches cavity is linked together, the output of urceolus with the drain pipe is linked together.
Further, the water source is communicated with the input end of the inner barrel through a water inlet at the top of the inner barrel.
Further, the output end of the inner cylinder is communicated with the upstream cavity through a water inlet pipe.
Further, the output end of the outer barrel is communicated with the drain pipe through a tail water pipe.
Further, the geotextile test sample lifting device further comprises a lifting platform used for changing the upstream and downstream water level difference of the geotextile test sample.
Further, one end of the upstream water level pipe is communicated with the upstream water level communication port through an upstream water level communication pipe.
Further, one end of the downstream water level pipe is communicated with the downstream water level communication port through a downstream water level communication pipe.
Furthermore, a water receiving funnel used for receiving the water of the overflow port is arranged at one end of the water outlet pipe.
Further, the water level measuring device further comprises a graduated scale used for displaying the water levels in the upstream water level pipe and the downstream water level pipe.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the embodiment, the geotextile sample is arranged in the middle of the permeator, the permeator is divided into the upstream cavity and the downstream cavity which are communicated with a water source, water in the downstream cavity flows into the water outlet pipe through the overflow port, and the flow sensor in the water outlet pipe measures the water flow velocity passing through the geotextile sample; the upstream cavity and the downstream cavity are respectively communicated with an upstream water level pipe and a downstream water level pipe, and an upstream water level sensor and a downstream water level sensor for measuring water levels are respectively arranged in the upstream water level pipe and the downstream water level pipe; the intelligent controller receives data measured by the flow sensor, the upstream water level sensor and the downstream water level sensor and calculates the permeability coefficient of the geotextile sample, so that the automatic calculation of the vertical permeability coefficient of the geotextile is realized, the operation is simple and convenient, and the detection efficiency and the result accuracy can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram illustrating an apparatus for automatically measuring permeability coefficient of geotextile according to an exemplary embodiment.
The reference numerals in the figures include:
100. a permeator; 110. a geotextile sample; 120. an upstream chamber; 130. a downstream chamber; 140. an overflow port; 200. an upstream water level pipe; 210. an upstream water level communication port; 220. an upstream water level sensor; 230. an upstream water level communicating pipe; 300. a downstream water level pipe; 310. a downstream water level communication port; 320. a downstream water level sensor; 330. a downstream water level communicating pipe; 400. a water outlet pipe; 410. a flow sensor; 420. a water receiving funnel; 500. an intelligent controller; 600. a drain pipe; 700. a water stabilizing head water tank; 710. an inner barrel; 711. a water inlet; 712. a water inlet pipe; 720. an outer cylinder; 721. a draft tube; 800. a lifting platform; 900. a graduated scale.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Fig. 1 is a schematic structural diagram illustrating an apparatus for automatically measuring and reading permeability coefficient of geotextile according to an exemplary embodiment, as shown in fig. 1, the apparatus may include a permeator 100, an upstream water level pipe 200, a downstream water level pipe 300, a water outlet pipe 400, and an intelligent controller 500, the middle of the permeator 100 is provided with a geotextile sample 110, the permeator 100 is divided into an upstream chamber 120 and a downstream chamber 130, the upstream chamber 120 is communicated with a water source, and the downstream chamber 130 is provided with an overflow port 140; one end of the upstream water level pipe 200 is communicated with an upstream water level communication port 210 of the upstream chamber 120, and the other end of the upstream water level pipe 200 is provided with an upstream water level sensor 220; one end of the downstream water level pipe 300 is communicated with a downstream water level communication port 310 on the downstream chamber 130, and the other end of the downstream water level pipe 300 is provided with a downstream water level sensor 320; one end of the water outlet pipe 400 is arranged below the overflow port 140, the other end of the water outlet pipe 400 is communicated with a water outlet pipe 600, and a flow sensor 410 for measuring the water flow rate passing through the geotextile sample 110 is arranged in the water outlet pipe 400; the intelligent controller 500 is connected to the upstream water level sensor 220, the downstream water level sensor 320 and the flow sensor 410, respectively.
As can be seen from the above embodiments, the present application arranges the geotextile sample 110 in the middle of the permeator 100 and divides the permeator 100 into the upstream chamber 120 and the downstream chamber 130 which are communicated with the water source, the water in the downstream chamber 130 flows into the outlet pipe 400 through the overflow port 140, and the flow sensor 410 in the outlet pipe 400 measures the flow rate of the water passing through the geotextile sample 110; the upstream and downstream chambers 120 and 130 are respectively communicated with the upstream and downstream water level pipes 200 and 300, and the upstream and downstream water level sensors 220 and 320 for measuring water levels are respectively provided in the upstream and downstream water level pipes 200 and 300; the intelligent controller 500 receives the data measured by the flow sensor 410, the upstream water level sensor 220 and the downstream water level sensor 320 and calculates the permeability coefficient of the geotextile sample 110, thereby realizing the automatic calculation of the vertical permeability coefficient of the geotextile, being simple and convenient to operate, and improving the detection efficiency and the result accuracy.
Specifically, the intelligent controller 500 is connected to the upstream water level sensor 220, the downstream water level sensor 320 and the flow sensor 410 respectively, so as to automatically measure and read the upstream and downstream water levels of the geotextile sample 110 and the water flow passing through the sample in unit time.
In one embodiment, the water from the water source enters the permeator 100 through the bottom of the permeator 100 and the water passes from bottom to top through the sample and the permeator 100, so the upstream chamber 120 is the chamber below the geotextile sample 110 that is in communication with the water source and the downstream chamber 130 is the chamber above the geotextile sample 110.
Specifically, the upstream water level pipe 200 and the downstream water level pipe 300 respectively display the upstream and downstream water levels of the geotextile specimen 110 by using the principle of a communicating vessel.
Specifically, the upstream water level communication port 210 is disposed on the sidewall of the upstream chamber 120 at a predetermined distance from the geotextile sample 110, the downstream water level communication port 310 is disposed on the sidewall of the downstream chamber 130 at a predetermined distance from the geotextile sample 110, and the diameters of the upstream water level communication port 210 and the downstream water level communication port 310 are the same, so that the head loss along the way in the water level measurement process is uniform.
In one embodiment, the upstream water level communication port 210 and the downstream water level communication port 310 are both 5cm away from the geotextile sample 110 and 10mm in diameter. Too large distance can increase the on-way head loss and influence the accuracy of water level measurement; if the distance is too small or the diameter of the communication opening is too large, the stability of water flow near the sample is influenced, and the laminar flow state is damaged; when the diameter of the communication opening is too small, bubbles are attached to the inner wall of the pipe, and the accuracy of a detection result is affected.
Specifically, the device may further include a head stabilizing water tank 700, where the head stabilizing water tank 700 includes an inner cylinder 710 and an outer cylinder 720, the top of the inner cylinder 710 is communicated with the outer cylinder 720, the water source is communicated with the input end of the inner cylinder 710, the output end of the inner cylinder 710 is communicated with the upstream chamber 120, and the output end of the outer cylinder 720 is communicated with the drain pipe 600.
In one embodiment, the side length and the height of the water stabilizing head tank 700 are both not less than 50cm, and the temperature change is not more than 1 ℃ per hour. So as to ensure that the water flow in the water stabilizing head water tank 700 is stable and in a laminar flow state, and the water temperature change amplitude meets the requirement of 20 +/-2 ℃ required in the specification.
Specifically, the water source is communicated with the input end of the inner barrel 710 through the water inlet 711 at the top of the inner barrel 710, and in one embodiment, the water source enters the inner barrel 710 through a water pipe arranged at the water inlet 711, and the water pipe extends below the overflow elevation of the inner barrel 710 to ensure that the water tank always keeps an overflow state and the water head is stable.
Specifically, the output end of the inner barrel 710 communicates with the upstream chamber 120 through an inlet pipe 712.
Specifically, the output end of the outer cylinder 720 is communicated with the drain pipe 600 through a draft tube 721.
Specifically, the lifting platform 800 is used for changing the difference between the upstream water level and the downstream water level of the geotextile sample 110, and specifically, the lifting displacement of the lifting platform 800 is not less than 50 cm. In a specific implementation, the difference between the upstream and downstream water levels of the sample can be changed by the ascending or descending of the lifting platform 800, the upstream and downstream water levels are automatically measured and read by the upstream water level sensor 220 and the downstream water level sensor 320, the water flow rate passing through the geotextile sample 110 is automatically measured and read by the flow sensor 410, so that the water flow rate passing through the sample under different hydraulic gradients is obtained, and the vertical permeability coefficient of a single sample is calculated.
Specifically, one end of the upstream water level pipe 200 communicates with the upstream water level communication port 210 through an upstream water level communication pipe 230.
Specifically, one end of the downstream water level pipe 300 communicates with the downstream water level communication port 310 through a downstream water level communication pipe 330.
In one embodiment, the inner diameters of the inlet pipe 712, the outlet pipe 400, and the draft pipe 721 are 20mm, the inner diameters of the upstream water level communication pipe 230, the downstream water level communication pipe 330, the upstream water level pipe 200, and the downstream water level pipe 300 are 10mm, and the diameter of the inlet 711 is 30 mm. The diameter of the water inlet 711 is larger than that of the water inlet pipe 712 and the water outlet pipe 400, so that the water stabilizing head water tank 700 is always kept in an overflow state and the water head is stable. The diameter of the water inlet pipe 712 should not be too large, so as to control the water flow rate and ensure the water flow to be in a laminar state. The upstream and downstream level tubes 300 should not be too large to reduce head loss on the way.
In one embodiment, the top plate of the surge tank 700, the top end of the upstream water level pipe 200, the top point of the downstream water level pipe 300 and the overflow port 140 of the permeator 100 are level when the elevating platform 800 is raised to the top point, and when the elevating platform 800 is raised to the top point, water does not flow and does not overflow the upstream and downstream water level pipes 300; when the lifting platform 800 is lowered from the highest point downwards, the flow speed of water passing through the sample is gradually increased, the water flow is still in a laminar flow state, and the water level in the water stabilizing head water tank 700 is always kept constant.
Specifically, a water receiving funnel 420 for receiving the water of the overflow port 140 is disposed at one end of the water outlet pipe 400, and the structure of the water receiving funnel 420 can reduce the loss of the water of the overflow port 140 in the receiving process.
Specifically, the apparatus may further include a scale 900 for displaying the water levels in the upstream and downstream water level pipes 200 and 300, and in a specific implementation, the scale 900 may be used to verify the accuracy and precision of the upstream and downstream water level sensors 220 and 320 after manually reading the data.
Specifically, the working process of the device capable of automatically measuring and reading the permeability coefficient of the geotextile provided by the application comprises the following steps:
the thickness is delta (cm) and the water passing area is A (cm)2) The geotextile sample 110 is placed in the middle of the permeator 100 and the water source is passed through the water pipe provided with the water inlet 711In the inner cylinder 710, the left lower side of the inner cylinder 710 is communicated with the water inlet pipe 712 and guides the water flow into the downstream chamber 130 of the permeator 100, and the water flow vertically flows through the geotextile sample 110, passes through the upstream chamber 120 of the permeator 100, then flows out from the overflow port 140, passes through the water outlet pipe 400, then flows into the tail water pipe 721 and is discharged. The flow sensor 410 in the water outlet pipe 400 can measure the water flow velocity v in real time, and the water level difference delta h can be obtained by measuring the upstream and downstream water levels through the water level sensors in the upstream and downstream water level pipes 300 according to the principle of the communicating vessel, and the intelligent controller 500 can measure the water flow velocity v and the water level difference delta h according to the formula and the thickness delta and the water passing area A of the geotextile sample and the formula
Calculating to obtain a vertical permeability coefficient k20Wherein
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. An apparatus for automatically measuring and reading permeability coefficient of geotextile, comprising:
the device comprises a permeator, a filter and a controller, wherein a geotextile sample is arranged in the middle of the permeator to divide the permeator into an upstream chamber and a downstream chamber, the upstream chamber is communicated with a water source, and an overflow port is arranged on the downstream chamber;
one end of the upstream water level pipe is communicated with an upstream water level communication port on the upstream chamber, and the other end of the upstream water level pipe is provided with an upstream water level sensor;
one end of the downstream water level pipe is communicated with a downstream water level communication port on the downstream cavity, and the other end of the downstream water level pipe is provided with a downstream water level sensor;
one end of the water outlet pipe is arranged below the overflow port, the other end of the water outlet pipe is communicated with a water outlet pipe, and a flow sensor for measuring the water flow velocity passing through the geotextile sample is arranged in the water outlet pipe; and
and the intelligent controller is respectively connected with the upstream water level sensor, the downstream water level sensor and the flow sensor.
2. The device of claim 1, further comprising a head stabilizing water tank, wherein the head stabilizing water tank comprises an inner cylinder and an outer cylinder, the top of the inner cylinder is communicated with the outer cylinder, the water source is communicated with the input end of the inner cylinder, the output end of the inner cylinder is communicated with the upstream chamber, and the output end of the outer cylinder is communicated with the drain pipe.
3. The apparatus of claim 2, wherein the water source communicates with the input end of the inner barrel through a water inlet at the top of the inner barrel.
4. The apparatus of claim 2 wherein the output end of the inner barrel communicates with the upstream chamber through an inlet tube.
5. The apparatus of claim 2 wherein the output end of the outer barrel communicates with the drain pipe through a draft tube.
6. The apparatus of claim 1 further comprising an elevator station for varying the upstream and downstream water head of the geotextile specimen.
7. The apparatus according to claim 1, wherein one end of the upstream water level pipe communicates with the upstream water level communication port through an upstream water level communication pipe.
8. The apparatus according to claim 1, wherein one end of the downstream water level pipe communicates with the downstream water level communication port through a downstream water level communication pipe.
9. The device of claim 1, wherein a water receiving funnel is provided at one end of the water outlet pipe for receiving water from the overflow port.
10. The apparatus of claim 1 further comprising a scale for displaying the water level in the upstream and downstream water level tubes.
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| CN202122836901.2U CN216560182U (en) | 2021-11-18 | 2021-11-18 | Device capable of automatically measuring and reading permeability coefficient of geotextile |
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| CN202122836901.2U CN216560182U (en) | 2021-11-18 | 2021-11-18 | Device capable of automatically measuring and reading permeability coefficient of geotextile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054311A (en) * | 2023-08-15 | 2023-11-14 | 上海勘测设计研究院有限公司 | Geotextile vertical penetration testing device |
| CN117054311B (en) * | 2023-08-15 | 2024-05-24 | 上海勘测设计研究院有限公司 | Geotextile vertical penetration testing device |
-
2021
- 2021-11-18 CN CN202122836901.2U patent/CN216560182U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054311A (en) * | 2023-08-15 | 2023-11-14 | 上海勘测设计研究院有限公司 | Geotextile vertical penetration testing device |
| CN117054311B (en) * | 2023-08-15 | 2024-05-24 | 上海勘测设计研究院有限公司 | Geotextile vertical penetration testing device |
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