Product Introduction

Used for measuring horizontal permeability of various geotechnical materials, with stable performance and convenient practicality

Geosynthetics horizontal permeameterScope of application:Used to determine the characteristics of geotextiles and plastic drainage boards in terms of water flow along their plane direction.
Geosynthetics horizontal permeameterCompliant with standards:JTG E50 T1143 SL/T 235-1999
Technical parameters:
1. Effective length of sample: 400mm
2. Head difference: 200mm, hydraulic gradient: 0.5
3. Apply a lateral pressure of 350Kpa to the sample as needed, ranging from 0 to 200Kpa
4. Dimensions: 800 * 720 * 2100mm
5. Weight: 100kg

Operation steps:

1. The test water should be deaerated water or distilled water.

2. Cut 3 samples in the longitudinal and transverse directions respectively. When the sample is thin, 2 or 3 layers of samples should be overlapped to form a group for testing. At this time, 6 or 9 samples should be cut respectively.

3. Wrap the sample in latex film or rubber sleeve, and the sample should be flat and wrinkle free,

There should be no leakage in the surrounding area. For direct loading type, the upper and lower cushion layers of the sample should be carefully installed to ensure that the sample can withstand uniform normal pressure.

4. Apply a pressure of 2-5kpa to position the sample, then inject deaerated water into the water level container to remove any bubbles inside the sample. During the test, the sample should be saturated.

5. Select hydraulic gradient according to site conditions, and when the situation is unclear, select hydraulic gradient not greater than 1.0

6. Select at least three types of normal pressure tests based on site conditions or design requirements, with one pressure slightly higher than the design value and the other slightly lower than the design value. Apply the smallest normal pressure to the sample for 15 minutes. Raise the water level of the container to achieve the required hydraulic gradient. After the water flow stabilizes, measure the time it takes for 500 cubic centimeters of permeate to pass through, or record the amount of water passed within 15 minutes. Three parallel measurements were taken under each hydraulic gradient.

7. Repeat the above steps using a different hydraulic gradient.

8. Increase the pressure in the FA direction and repeat the above steps to complete the tests under the remaining normal pressures.