The test report of the geosynthetics vertical permeation instrument includes the following contents - Huaqiang Electronic Network

Test - uppercase JPG - memory 146K

According to JTGE50-2006, the standard development and design of the in-plane water flow of geosynthetics. Applicable to the vertical penetration measurement of various geotechnical materials, stable performance, convenient and practical.

Technical Parameters:

1. Sample size: Ñ„80mm

2. Dimensions: 600X750X1900

3. Machine weight: 150Kg

Instructions

1. Place the sample in water containing humectant and soak for at least 12 hours until saturated and remove air bubbles. The humectant used 0.1% V/V sodium alkyl benzene sulfonate.

2. Remove the high pressure chamber (see Figure 12 between the instruments). Install the test piece (5) on the holder (6). The sample requirements: the sample should be clean, the surface is free of dirt, no visible dirt or creases. Fold and place on a flat surface with no load applied. Then install the high pressure chamber and tighten the high pressure cylinder nut in equilibrium.

3. Open the water valve (3) and (1) inject the clean water source into the high pressure water tank (2). Until the water level on both sides reaches a head difference of 50mm (11). Turn off the water supply. If the water heads on both sides of the sample are not balanced within 5 minutes, look for unclean air. Open (13) the exhaust valve to re-vent. And noted in the test report.

4. Adjust the water flow so that the head difference reaches 70mm ± 5mm and record this value. Accurate to 1mm. After the head is stable for 30s, the drum is collected in the specified time period (8). The permeate water collection tube passes through the instrument's permeate water volume, the volume is accurate to 10mL, the time is accurate to s, and the permeate water volume is 1000mL, and the time is at least 30s.

5, respectively, the maximum head difference of 0.8, 0.6, 0.4 and 0.2 times the head difference. Repeat the procedure in 2.3.4 above, starting with the highest flow rate and ending with the lowest flow rate, and record the corresponding amount of permeate and time.

6. Record the water temperature to the nearest 0.2 °C.

7. Calculate the results according to the corresponding standards of T1141-2006.

After the test is completed, open the drain valve (4) and drain all parts of the water. Clean the surface of the instrument.

experiment report

The test report should include the following:

(1) Sample name, specification model and status description;

(2) a description of the state of the sample;

(3) the date of the test;

(4) Permeation gauge specifications and main technical indicators;

(5) The effective water area of ​​the sample;

(6) A set of flow rate versus head loss curves for each sample when determining total permeation performance;

(7) The flow velocity index (VI50) when the head difference is 50 mm, such as the vertical permeability coefficient and the water permeability;

(8) Water temperature range;

(9) Water supply method and dissolved oxygen value;

(10) Any detailed description of the deviation from the prescribed procedure.