C046 Surface shaker for coarse-grained and giant-grained soil
The relative density of non-cohesive free drainage soil was determined. It is suitable for non-cohesive free-draining coarse and large-grained soils with a mass percentage of dry particles passing a 0.075mm standard sieve of not more than 15%. For giant grain soil with a maximum particle size greater than 60mm, due to the limitation of the maximum particle size allowed by the test cylinder, a series of model samples with reduced particle size can be prepared according to a similar grading method.
The compaction of the soil is expressed by the following ratios (1) and (2):
(1) The difference between the porosity ratio of the non-cohesive soil in the loosest state and the specified porosity ratio.
(2) The difference between the porosity of the soil in the loosest and densest state
1. Voltage: 220V ± 10V 380V ± 10V
2. Size surface of shaking table: 0.8m2
3. Vibration frequency: 40Hz, amplitude: 0-2mm
(GB) inner diameter 300mm, height 340mm, volume 24033cm3, sample weight 40-50kg, applicable particle size 60mm;
(Ministry standard) Inner diameter φ280mm, height 300mm, volume 14200cm3, sample weight 40-50kg, applicable particle size 60mm;
5. Sample tube B: (standard) inner diameter 152mm, height 170mm, volume 2800cm3, particle diameter 20mm,
6. Sleeve: It is tightly connected to the sample tube and fastened above the vibrating table, which is convenient for loading and unloading.
7. Heavier cover plate: the thickness of the cover plate is 12mm steel plate, the diameter of the sample tube is slightly smaller, the total pressure of the heavier cover plate and the weight is 18kPa (Ministry standard), and the center should have 15mm to lift off the screw hole.
8. Stylus holder and stylus: stylus graduation value 0.1mm, length 100mm
9. Sleeve: It is tightly connected with the sample tube, 100mm high, and it is placed on the electromagnetic vibration table to facilitate the loading and unloading.
10. Weighted cover plate: The thickness of the cover plate is 12mm steel plate, the sample tube is slightly smaller in diameter, the total pressure of the weighted cover plate and the weighted object is 14kPa (national standard), and the center should have 15mm to lift off the screw hole.
11. Stylus holder and stylus: stylus graduation value is 0.1mm, length is 100mm