Surface vibration compaction tester

Surface vibration compaction tester

For the determination of the maximum dry density of non cohesive free draining soil, the curve shaped test curve of the compaction test method shows multiple peaks or no significant peaks, indicating that this method is no longer suitable for this type of soilThe experimental method has been established, and the compaction method has been determinedThe 'maximum dry density' is often lower than the results of the vibration compaction test, according to the British standardBS1377, Sweden“SS027109”It is stipulated that the surface vibration compactor method should be used for highly permeable soil. The industry standard of China's Ministry of Transport, "Highway Geotechnical Test Regulations"（JTG3430-2020）Based on the experimental research of the Highway Science Research Institute of the Ministry of Transport, this method has been newly added, which does not produce separation phenomenon during vibration compaction. The vibration table method is complex to operate, and the sample is prone to separation phenomenon during vibration compaction. ThereforeJTG3430-2020It is recommended to prioritize the use of surface vibration compactor method, and this method can also be used for component work such as large triaxial testing of coarse-grained soil, permeability testing, concrete material testing, and base material testing.

Surface vibration compaction tester

1When installing this machine, it is best to pour a concrete base to ensure stable operation of the machine. The cushion should be placed on the concrete base8-10mmRubber sheet to reduce vibration

2This machine has been set upThe "emergency stop" button, when the machine performs any action, pressing the "emergency stop" button will stop all actions

3releaseWhen pressing the "emergency stop" button, rotate in the direction indicated by the arrow at the top of the button90Release the "emergency stop" button when the angle is reached

4During the vibration compaction process, if the depth of descent of the machine's suspension screw is not sufficient, there may be empty vibration. In this case, simply press the buttonPress the "down" button and press the "stop" button when you reach a certain position

5This machine is equipped with a travel switch, which can be pressed when the vibration rises or falls to the top or bottom dead centerStop button, the machine automatically stops

6During normal operation, the top dead center of the large sliding sleeve lifting tool20mmAt this time, you can press the "stop" button. When descending, the hammer head has already touched the soil sample, and the large sliding sleeve is descending50-60mmPress the 'stop' button when needed

7Regularly add lubricating oil and grease to the sliding and buttered parts

8Before each operation experiment, the dust on the outer surface of the column should be eliminated, and mechanical oil should be added（20#）