CN209745771U - Be used for on-spot monocycle infiltration test device - Google Patents
Be used for on-spot monocycle infiltration test device Download PDFInfo
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- CN209745771U CN209745771U CN201920380724.1U CN201920380724U CN209745771U CN 209745771 U CN209745771 U CN 209745771U CN 201920380724 U CN201920380724 U CN 201920380724U CN 209745771 U CN209745771 U CN 209745771U
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Abstract
The utility model discloses a be used for on-spot monocycle infiltration test device, including trying the ring, the ponding container, the water injection pipe, a water pump, flowmeter and controller, try the ring bottom in the indentation test soil layer, the ponding container passes through water pump and water injection pipe and injects water into trying the ring, the flowmeter is installed on the water injection pipe, try ring inner wall upper portion and be equipped with first water level inductor and second level sensor respectively, the water level of second level sensor response is less than the water level of first water level inductor response, and the water level difference of both responses is within 5mm, first water level inductor, second level sensor and water pump are connected with the controller electricity respectively. The device simple structure, it is easy and simple to handle, improved the precision of monocycle infiltration experiment.
Description
Technical Field
The utility model relates to a geotechnical engineering test instrument technical field, concretely relates to be used for on-spot monocycle infiltration test device.
Background
The single-ring water seepage test is a common simple method for measuring permeability coefficients of a gas-coated zone loose layer and a rock stratum in the field, and is particularly suitable for soil layers such as sandy soil, sand gravel and the like above an underground water level. As described in the chinese patent CN207336316U test apparatus for single-ring water injection in test pit, the existing test apparatus is not always available at the two points of maintaining stable water head and adapting to the soil with large water consumption by adding water into the container.
The CN207336316U test pit single ring water injection test device also provides a corresponding improvement technology, but still has the defects that: 1) the device ensures that the water injection speed can always ensure that a small amount of water overflows from the overflow pipe through manually adjusting the valve so as to control the stability of a water head, the overflow of the small amount of water is not easy to control, in addition, the overflow water seeps into a soil layer and possibly influences the measured permeability coefficient, and the method has certain uncertainty and human errors; 2) the device utilizes and sets up the flowmeter at water injection pipe and warning pipe to measure the water yield that infiltrates in the soil layer, and final infiltration water yield needs the reading calculation of two flowmeters to obtain, and the step is loaded down with trivial details.
Disclosure of Invention
In order to solve the problems existing in the prior art, the utility model provides a be used for on-spot monocycle infiltration test device, the device simple structure, it is easy and simple to handle, improved the experimental precision of monocycle infiltration.
Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:
The utility model provides a be used for on-spot monocycle infiltration test device, including the examination ring, test ring bottom push in test soil layer, still include the ponding container, the water injection pipe, a water pump, flowmeter and controller, the ponding container passes through water pump and water injection pipe and injects water to the examination ring, the flowmeter is installed on the water injection pipe, examination ring inner wall upper portion is equipped with first water level inductor and second water level sensor respectively, the water level of second water level sensor response is less than the water level of first water level inductor response, and the water level difference of both responses is within 5mm, first water level inductor, second water level sensor and water pump are connected with the controller electricity respectively.
the inner wall of the test ring is provided with scales along the axial direction.
Still include the valve, the valve is installed on the water injection pipe.
The top of the water accumulation container is opened.
compared with the prior art, the beneficial effects and advantages of the utility model reside in that:
1. The utility model discloses predetermine water level department at the inner wall of examination ring and be equipped with the water level inductor, can maintain better through the water level inductor and try ring interior water level stable, can guarantee to try ring interior anhydrous overflow, avoided the influence of overflowing to the measuring result of examination ring water-logging.
2. The utility model discloses only just can acquire the infiltration volume through a flowmeter reading in the pipeline, avoided the people for reading the error of ponding container scale and calculate the loaded down with trivial details of a plurality of flowmeter readings.
3. The utility model discloses simple structure easily assembles, and ponding container upper end opening conveniently adds water moreover, can continuously supply water, is applied to the measurement of the soil property of various water consumption in the field betterly.
Drawings
FIG. 1 is a schematic structural diagram of a single-ring water penetration test device used in a field.
Wherein, the test ring is 1, the water accumulation container is 2, the water pump is 3, the water injection pipe is 4, the first water level sensor is 5, the second water level sensor is 6, the controller is 7, the valve is 8, the flowmeter is 9 and the test soil layer is 10.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a structure for on-spot monocycle infiltration test device is shown in figure 1, including test ring 1, ponding container 2, water injection pipe 4, water pump 3, valve 8, flowmeter 9 and controller 7.
The height of the test ring 1 is 200-300mm, the inner diameter is 250-500mm, and the inner wall of the test ring 1 is provided with scales along the axial direction.
The top of the water accumulation container 2 is opened, and water is added into the water accumulation container through the top.
The water accumulation container 2 injects water into the test ring 1 through the water pump 3 and the water injection pipe 4, and the valve 8 and the flowmeter 7 are installed on the water injection pipe 4.
The upper part of the inner wall of the test ring 1 is respectively provided with a first water level sensor 5 and a second water level sensor 6, the water level of the second water level sensor 6 is slightly lower than that of the first water level sensor 5, the water level difference of the first water level sensor and the second water level sensor is within 5mm, and the first water level sensor 5, the second water level sensor 6 and the water pump 3 are respectively electrically connected with a controller 7.
When the water level reaches the preset induction water level of the first water level inductor 5, the first water level inductor 5 sends a signal to the controller 7 to control the water pump 3 to stop supplying water, and when the water level is reduced to the preset induction water level of the second water level inductor 6, the second water level inductor 6 sends a signal to the controller 7 to control the water pump 3 to recover water supply.
The single-ring water seepage test is carried out by using the on-site single-ring water seepage test device, and the steps are as follows:
1) Pressing the test ring 1 into a test soil layer 10 to a depth of 50-80mm, filling the test ring with clay to ensure that the periphery of the test ring is watertight, and then paving 20-30mm thick gravel or crushed stone 11 with a particle size of 5-10mm at the bottom of the test ring as a buffer layer;
2) Filling the water accumulation container 2 with water, sequentially opening the valve 8 and the water pump 3, and then adjusting the valve 8 to fill water into the test ring 1;
3) When the water level in the test ring 1 reaches the preset induction water level (100 mm higher than the test soil layer) of the first water level inductor 5, the first water level inductor 5 sends a signal to the controller 7 to control the water pump 3 to stop supplying water, and at the moment, timing is started;
4) firstly, the water seepage volume is measured for 1 time through the flowmeter every 5 minutes, the water seepage volume is measured for 5 times continuously, then the water seepage volume is measured for 1 time every 20 minutes and at least 6 times are measured continuously, in the process, when the water level in the test ring is lower than the preset induction water level of the second water level inductor 6, the second water level inductor 6 sends a signal to the controller 7 to control the water pump 3 to continue supplying water, when the water level reaches the preset induction water level of the first water level inductor 5, the first water level inductor 5 sends a signal to the controller 7 to control the water pump 3 to stop supplying water, the circulation is carried out, and the water level difference induced by the two inductors is small, so that the water level in the test ring can be basically controlled to be stable. In addition, when the water in the water accumulation container 2 is less, water can be added into the water accumulation container 2 at any time;
5) and recording the volume flow reading of the flowmeter 9 at each time node, calculating the water seepage volume measured every 1 time by difference, finishing the test when the difference of the water seepage volumes measured for 2 times is not more than 10% of the water seepage volume measured for the last time, and taking the water seepage volume measured for the last time as a calculated value.
6) the permeability coefficient of the test soil layer is calculated by the following formula:
In the formula: k is the permeability coefficient of the test soil layer, cm/min; a is the inner diameter area of the test ring 1, cm 2; t is the duration of 1 measurement, min; q is the water penetration volume in 1 measurement, cm 3.
Claims (4)
1. the utility model provides a be arranged in on-spot monocycle infiltration test device, includes the test ring, in the test ring bottom indentation test soil layer, its characterized in that: still include ponding container, the water injection pipe, a water pump, flowmeter and controller, the ponding container passes through water pump and water injection pipe and injects water to the test ring, the flowmeter is installed on the water injection pipe, test ring inner wall upper portion is equipped with first water level inductor and second level sensor respectively, the water level that second level sensor responded to is less than the water level of first water level inductor response, and the water level difference of both responses is within 5mm, first water level inductor, second level sensor and water pump are connected with the controller electricity respectively.
2. The apparatus for in situ single loop water penetration test according to claim 1, wherein: the inner wall of the test ring is provided with scales along the axial direction.
3. The apparatus for in situ single loop water penetration test according to claim 1, wherein: still include the valve, the valve is installed on the water injection pipe.
4. the apparatus for in situ single loop water penetration test according to claim 1, wherein: the top of the water accumulation container is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380724.1U CN209745771U (en) | 2019-03-25 | 2019-03-25 | Be used for on-spot monocycle infiltration test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380724.1U CN209745771U (en) | 2019-03-25 | 2019-03-25 | Be used for on-spot monocycle infiltration test device |
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| Publication Number | Publication Date |
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| CN209745771U true CN209745771U (en) | 2019-12-06 |
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| CN201920380724.1U Active CN209745771U (en) | 2019-03-25 | 2019-03-25 | Be used for on-spot monocycle infiltration test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218842A (en) * | 2021-04-30 | 2021-08-06 | 中建五局土木工程有限公司 | On-site testing method and on-site testing device for unsaturated permeability coefficient |
| CN113607619A (en) * | 2021-07-08 | 2021-11-05 | 江苏澳墨环境科技有限公司 | Water seepage test device and use method thereof |
-
2019
- 2019-03-25 CN CN201920380724.1U patent/CN209745771U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218842A (en) * | 2021-04-30 | 2021-08-06 | 中建五局土木工程有限公司 | On-site testing method and on-site testing device for unsaturated permeability coefficient |
| CN113607619A (en) * | 2021-07-08 | 2021-11-05 | 江苏澳墨环境科技有限公司 | Water seepage test device and use method thereof |
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