A seasonal frost heave foundation treatment method and treatment device

Abstract

The invention discloses a processing method and processing device for a seasonal frost heaving foundation. The processing method includes the steps that drilled holes extending into the bottom of a movable layer of the foundation are drilled in the to-be-processed foundation; a saline solution is injected into the drilled holes; and an electrode is inserted in each of every two adjacent drilled holes where the saline solution is injected, and voltage is applied to the position between every two adjacent electrodes for conducting electrolysis on the portion, between every two adjacent drilled holes, of the movable layer. During electrolysis, every three drilled holes form one construction cycle, each positive electrode is located between two negative electrodes, and in each cycle, the positive electrodes are not moved and the positions of the negative electrodes are changed. Gas generated through electrolysis according to the method is left in soil mass pores for a long time in the form of bubbles or gas channels, original pore water seepage channels are occupied, and therefore the soil mass permeability coefficient is decreased, the moisture supply of a lower water-rich soil layer to a freezing front of the movable layer is blocked, the segregation frost heaving amount is decreased, and the loss caused by the fact that salt in a traditional salinization method seeps along with underground water is weakened.

Description

technical field [0001] The invention relates to a treatment method and device for frost heave hazards of foundations, in particular to a treatment method and device for treating frost heave by combining electrolysis and salinization. Background technique [0002] About 98.9% of my country's area is covered by different types of permafrost. The area of ​​permafrost areas that have a greater impact on engineering construction accounts for 75% of the country's area, while seasonal permafrost accounts for 53.5% of my country's land area. Seasonally frozen soil is a special soil-water system containing ice crystals. Changes in external temperature will cause changes in the state of the soil. There is a seasonally active layer that freezes in winter and thaws in summer. In engineering disasters, the frost heave of the active layer of seasonally frozen soil is generally concerned. question. Frost heave is caused by the freezing of water in the soil and the growth of ice (especiall...

AI Technical Summary

Problems solved by technology

[0005] (1) Refilling has strict requirements on materials, and it may not be possible to obtain local materials, and the construction volume is huge and the cost is too high;

[0006] (2) The effective treatment depth of dynamic compaction is limited, and it is easy to cause vibration damage to nearby existing buildings;

[0007] (3) The heat insulation layer is easily damaged by corrosion and external force, and the treatment effect decays with the number of freeze-thaw cycles;

[0009] (5) Adding hydrophobic substances such as industrial vaseline, residual oil, etc., are industrial raw materials and are not conducive to the environment

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