A method for treating liquefied foundation by blasting drainage

Abstract

The invention discloses a method for treating a liquefied foundation through explosion and drainage. The method comprises the following steps: arranging a plurality of vertical drainage boards penetrating through a soil layer which is liable to be liquefied at intervals in a liquefied foundation region to be treated; burying explosives in the soil layer which is liable to be liquefied; igniting the explosives, and rearranging the soil structure in the liquefied foundation by utilizing the impact force generated by the explosives; squeezing water out, and discharging the water from the drainage boards. The method disclosed by the invention has the advantages that 1) the method provides vertical drainage channels, the instantaneous impact force generated by explosion can accelerate the dispersion of pore water pressure, so that the water in the foundation is discharged, and the purposes of realizing quick dense sedimentation and eliminating liquefaction are achieved; 2) the construction speed is greatly increased, and the construction period is shortened; compared with the method for treating the liquefied foundation through pile foundations, the method disclosed by the invention is low in cost, simple to operate, and good in liquefaction resisting effect; 3) the application range is extensive, and the method is applicable for general liquefied foundations.

Description

technical field [0001] The invention belongs to the technical field of foundation treatment, and in particular relates to a method for blasting drainage to treat liquefied foundations. Background technique [0002] Earthquake is one of the major threats faced by human beings. It will not only cause huge casualties, but also cause deformation and damage of a large number of buildings, roads, bridges and tunnels, and underground pipelines. Liquefaction is one of the reasons that cannot be ignored. With the frequent earthquake disasters in recent years, the problem of soil liquefaction has been paid more and more attention and researched. [0003] The measures to resist liquefaction mainly include: (1) improving the particle structure of sandy soil, improving the compactness of soil and the stability of particle skeleton; (2) improving the structure of sandy soil. Chemical grouting, pile foundation treatment, etc. [0004] At present, the methods used to deal with liquefied f...

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Problems solved by technology

[0006] (1) It has a certain impact on the compaction of the soil and adjacent buildings, and the noise and vibration are large during construction.

[0007] (2) It is not very effective for the soil layer dominated by fine particles, because the permeability coefficient of fine particle soil is small, and the drainage channels are not smooth, which makes the gaps difficult to compress

[0008] (3) The depth of influence is limited and can only reach about 10 meters

[0011] (1) When the easily liquefied layer is deeply buried or thick, this method loses its meaning;

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