How Stabilized Soil Mixers Work

The main function of the Stabilized Soil Mixer is to crush the soil and evenly mix the soil with the Stabilizer. This process is done in a working chamber consisting of a rotor casing, through the rotation of the rotor. According to the different operating objects (ie, soil hardness), the rotation direction of the selected rotor is also different: When the mixing is performed on a soft soil layer, the forward rotation method is generally adopted; when the solution is mixed on a hard soil layer Or when the old asphalt concrete pavement is milled, the reverse method is often used. The following is an analysis of the operation of the Stabilized Soil Mixer when the stabilizer has been spread on the soil. as the picture shows.

(1) Forward operation process

When the rotor rotates in the forward direction, the cutter rotating at a high speed cuts a very thin crescent-shaped soil chip from the soil layer and throws it to the hood. This is the cutting process; the thrown soil hits the hood wall with a certain force. Afterwards, they scattered around and scattered a part of the soil particles to be crushed; some of the soil particles collided with the tool again or collided with each other. This process was called secondary crushing; another part collided with the cover and then dispersed. The soil particles and the sinking soil shells are picked up by the cutter and thrown into the upper part of the rotor wall in the enclosure wall B. Some of the soil particles gradually move forward and are placed in zone A and form the former strip earth mound; The soil in Zone A will again be impacted and cut by the rotor tool. The above process was repeated several times. The figure caused the particles to be broken very finely, and evenly mixed with the stabilizer. Finally, most of the soil particles were lost on the ground due to the loss of speed. At this time, the volume of the soil was increased due to looseness, and A circular mound is formed in the lower C area of ​​the rear wall of the cover, and is scraped and shaped by the lower edge of the cover drag plate to form a stable earth belt layer having a certain thickness and a flat surface.

(2) Reverse rotation process

When the rotor rotates in reverse, the cutter rotating at a high speed cuts the soil upward from the bottom of the ditch, and throws the cut soil forward in the forward direction of the machine, forming a front long strip mound in front of the rotor; in the same working state, the long soil The size of the pile will remain substantially constant and will continue along the soil treatment section; a significant portion of the soil that has been cut will be thrown into Zone C, a portion of which will be thrown upwards and hit the front wall, and the soil particles that collide with the enclosure will be It will scatter around, and the soil particles that collide with the tool will be thrown toward the back wall of the housing in the direction of rotor rotation. It can be seen that the soil to be treated is basically thrown from the top of the rotor to the C zone by means of a mixing knife, and is leveled and reshaped by the lower edge of the cover dragging plate to form a stable soil zone.

From the above analysis of the working principle, we can see that the entire mixing process is divided into two stages of cutting and mixing, but the two stages are not absolutely separate, but are intertwined and often occur at the same time.

Modern stable soil mixers are almost all single-rotor working devices. They are usually mixed on the same operation belt twice, and some even three or four times. This depends on the mechanical properties and the nature of the project.