Water conservancy surface vibration compaction tester

HTYS-1 typeWater conservancy surface vibration compaction tester

1Overview

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 the most suitable experimental method for this type of soil, and the compaction method determinesThe '* dry density' is often lower than the results of the vibration compaction test, according to British standardsBS1377,SwedenSS027109It is stipulated that the surface vibration compactor method should be used for highly permeable soil. our country*Li BuThe experimental research has added this method and vibration table method as the basic experimental methods for determining the maximum dry density of non cohesive coarse-grained soil and giant grained soil. The surface vibrator method is similar to the vibration compaction working condition, with simple operation and easy separation during the vibration compaction process. Therefore,DL-T5356-2024It is recommended to prioritize the use of surface vibration compactor method, and this method can also be used for component work such as coarse soil triaxial test, permeability test, concrete material test, and base material test.

IITechnical specifications

1Power supply voltage:380V (Three phase four wire, blue wire is neutral wire)

2Motor power:0.75-2.2KW

3vibration frequency45-50HZ

4Excitation force:4.5-5.4KN

5The static pressure exerted by the ramming plate on the surface of the pattern:14Kpa

6Test bucket specification: one steel large bucket, inner diameter505mm.One small bucket, inner diameter305mm.

IIIVibration compaction mechanism

The vibration compaction plate is vertically compacted on the surface of the pattern and propagated from top to bottom. After the particles are cut and crushed, their positions are rearranged and moved to the most stable position corresponding to the geotechnical test specifications and standard conditions

Thus, the soil is compacted, and the instrument is shown in the following figure:

4Experimental steps

1Install a suitable test bucket（According to the standard table of geotechnical testing methods for highways:125.2.1）Tighten the test bucket and take an appropriate amount of soil sample (according to the operating procedures), using the prescribed toolsAccording to the standard table of geotechnical testing methods for highways:125.2.1）Load into the test bucket and roughly scrape the surface of the sample flat

2Confirm that the three-phase power supply is well connected and the power indicator light on the controller panel is on

3Press on the controllerThe "up" and "down" buttons allow the vibration motor and counterweight components to move freely

4When the up switch is pressed and the vibrator actually descends or when the down switch is pressed and the vibrator actually ascends, the power cord should be reversed, otherwise it is easy to damage the machine

5pressThe "descent" button drives the vibrating plate, ramming plate, and ramming plate to descend. When the ramming plate comes into contact with loose soil samples,15~25mmtimeloosen“decline”Press the button to stop the sliding sleeve from descending

6Set the timer on the controller and set the time to6Minutes, (i.e. the black toggle switch is in the middle position, the dial number is)060）

7pressVibration "switch, the vibrator starts to vibrate, the timer displays the vibration time, until6The vibrating plate will automatically stop after minutes

8pressThe "up button" sleeve drives the vibration plate, and the ramming plate rises to the upper end face of the limit block under the gearbox10-15mm，loosen“rise”Press the button to stop the skateboard from rising.

9Add a second soil sample according to the prescribed method and repeat the above steps twice. One sample is considered to have been compacted by vibration

10Remove the test bucket, use a straight steel ruler, place it at the diameter position of the test bucket, measure the data according to the regulations, and weigh it

11Data organization and calculation

Notes:

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

2During the vibration compaction process, if the machine is suspendedsteel wireThe depth of descent is not sufficient, which may result in empty vibration. To achieve this, simply press the following buttonThe 'down' button, after reaching a certain positionloosen“decline”Just press the key

3When tightening the bolts of the hood on the vibration plate, all of them were coated with anti stripping adhesive. If there is a malfunction, a little bit of it is needed to remove them914Glue to prevent bolt from dislodging

4During normal operation, the large sliding sleeve rises from the top dead center10mmWhen, that isloosen“rise”Key, descent means the hammer has already touched the soil sample, and the large sliding sleeve is descending50-60mmYou should press the 'stop' button immediately

5Regularly add lubricating oil and grease to the sliding and buttered parts

6Before each operation test, the dust on the outer surface of the column should be removed and mechanical oil should be added（20#）

HTYS-1 typeWater conservancy surface vibration compaction tester