Vacuum preloading foundation treatment method

Abstract

The invention discloses a vacuum preloading foundation treatment method. The method can comprise the steps that a sand cushion is paved on a raw mud face, and a drainage channel is paved on the sand cushion; a film pressing furrow is dug around the sand cushion, and sealing films are paved; a monitoring instrument and a vacuum pump are mounted, and the vacuum pump is used for carrying out air extraction preloading on a foundation in the sealing films; after air extraction preloading reaches the unloading standard, vacuum preloading unloading is carried out, and film pressing furrow replacementis carried out and comprises the steps of draining accumulated water in the film pressing furrow and removing a soil layer in the film pressing furrow; and silt layering replacement is carried out inthe film pressing furrow, and layer-by-layer compaction is carried out. According to the method, the film pressing furrow is subjected to layering replacement and is compacted, the weak zone of the vacuum preloading foundation is eliminated, and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a vacuum preloading ground treatment method. Background technique [0002] There are a large number of soft soil foundations distributed along the coast of my country, mainly composed of silty clay, silty clay and silt. In recent years, with the vigorous development of the port-side economy, a large number of soft soil foundations have been caused by coastal dredging. During the construction process The use of vacuum preloading technology can avoid the transportation of large-scale heaped earthwork, and solve the problems of heaped raw materials, difficulties in finding soil sources, high heaped materials and transportation costs. To avoid the difficulty in transporting a large amount of earthwork after the stacking is completed, it is difficult to find the stacking point for foreign transport, resulting in a large number of problems such as machinery and transportation costs. At...

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Problems solved by technology

[0003] However, after vacuum preloading and unloading, the reinforcement effect of the soil layer below the film ditch bottom is basically the same as that of the soil layer in the area. Without vacuum reinforcement, coupled with long-term immersion in water, it is generally still in the state of silt and silt, which is a weak zone in the entire preloading site and cannot be used directly as a site

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