The vibrating table method experimental device is a professional testing instrument developed according to the highway geotechnical test standard. The vibrating table test device is used to measure the dry density of non-adhesive free drainage coarse soil, giant soil, and (including rockfill). The large density, this product has the advantages of compact structure, convenient use of the vibration table test device, and is widely used in construction field laboratories and scientific research units.
Shaking table method experimental device technical parameters:
★Use inverter, digital control
★ Vibration table size: 600x600mm (road standard) 762 × 762mm (railway standard)
★ Frequency vibration: 0---60HZ adjustable
★Double amplitude: 0---2mm adjustable
★ Weight: 100kg
Shaking table method experimental device test method (dry soil method)
★ Stir the sample thoroughly, even if the particle separation is as small as possible; then roughly divide it into three parts. Determine and record the mass of the empty test tube.
★ Use a spatula or funnel to slowly put any sample into the test tube, and pay attention to make the particle separation degree small (filling should be equal to or slightly lower than 1/3 of the height of the tube) The surface of the sample. Then, the test tube wall can be tapped several times with a rubber hammer or the like to sink the sample.
★ Place a suitable weighted base plate on the surface of the sample and gently turn it a few times to make the weighted base plate conform to the surface of the sample. Remove the weighted base handle.
★ Fix the test tube on the vibration table, install the sleeve, and fix it tightly with the test tube. Place the appropriate weight on the weighted base plate, and the upper part should not touch the inner wall of the sleeve as much as possible.
★ Set the vertical vibration double amplitude of the vibrating table test device at a vibration frequency of 50 Hz to 0.5 mm; or the vertical double amplitude at a vibration frequency of 60 Hz to be 0.35 mm.
The vibration test tube and the sample were vibrated at 50 Hz for 10 min; at 60 Hz for 8 min. After the vibration is removed, the weighting block is removed and the bottom plate is added.
★ Perform vibratory compaction of the second and third layers of samples according to steps 2-5 of this procedure. However, the third layer vibrating the base plate is no longer removed immediately.
★ Remove the sleeve and check whether the weighted bottom plate is in close contact with the surface of the sample. Press the edge of the bottom plate to see if it is lifted. If it is lifted, it should be noted in the test report.
★ Insert the dial indicator rod into each test tube guide sleeve; brush the fine-grained soil accumulated on the top surface of the test tube and on the weighted bottom plate at the measurement position on both sides of the test tube guide tile, and try to avoid These fine-grained soils are brushed into the test cylinders, and then each of the three dialect readings on the top surface of the test-tube (on the centerline) of each side of the test-tube guide is read and recorded, for a total of 12 readings (the average is the end) Dial indicator reading Rf).
★ Remove the weighted base plate and remove the test tube from the surface of the vibrating table test device. In this process, it is avoided as much as possible to increase the fine-grained soil deposited on the bottom plate and along the test tube into the test tube. If the quality of these fine-grained soil exceeds 0.2% of the total mass of the sample, the quality should be determined and indicated in the test report.
★ Determine and record the total mass of the test tube and the sample on a suitable table scale. Deduct the mass of the empty test tube to determine the mass of the sample, or carefully pour all the samples in the test tube into a known quality plate. Calculate the large dry density dmax.
★ Repeat steps 1-10 until a consistent large dry density value (better within 2%) is obtained. If excessive particle breakage or angular gravel, rockfill or weathered weak rock material is found, it is advisable to prepare a sufficient number of representative samples to avoid repeated use of the individual samples. Wet soil method, the results of finishing, compaction index calculation, please refer to the relevant specifications.
★标准筛：60mm; 40mm; 20mm;10mm; 5mm; 0.074mm
Vibration table method experimental device other supporting tools (self-matched by the user)
★ Dial indicator and bracket: the meter scale is at least 50mm, and the index value is 0.025mm.
★ Taiwan scale: measuring range 50Kg, feeling 6g
★ Lifting machine: lifting weight is at least 180Kg
★ Standard sieve: 60mm; 40mm; 20mm; 10mm; 5mm; 0.074mm
★ Other tools: thick bottom handle, oven, metal plate, spatula, large spoon and funnel, rubber hammer, stopwatch, straight steel ruler, test cloth cover, etc.
After the test of the vibrating table method experimental device is completed, please clean the surface of the test tube and the vibrating table test device, and rust-proof treatment, and then cover the dust-proof cover.