Vacuum preloading reinforcement mechanism
The vacuum preloading method uses atmospheric pressure as a preloading load. Firstly, a layer of water-permeable sand cushion is laid on the surface of the soft soil to be reinforced, and then several layers of air-tight plastic film or rubber cloth are covered thereon, which are sealed around the atmosphere and isolated from the atmosphere.
A drainage pipe is buried in the sand cushion layer, and then communicated with the vacuum pump to perform air pumping, so that the water permeable material maintains a high degree of vacuum, and a negative pore water stress is generated in the pore water of the soil, and the pore water and air in the soil are gradually sucked out. Thereby consolidating the soil.
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