Vacuum prepressing method of sand-free cushion layer of secondary circulation line system

Abstract

The invention relates to a vacuum prepressing method of a sand-free cushion layer of a secondary circulation line system. In the method, the steps of superficial layer vacuum quick solidification, superficial layer vacuum secondary solidification and impacting compaction are used for prepressing, and the method specifically comprises the following steps of: distributing geotextile, a vertical plastic drainage short plate, a transverse plastic drainage short plate, a main drainage pipe and a secondary drainage pipe, wherein a vacuum film, a side ditch pressing film and a vacuum pump are arranged on the geotextile; paving a movable track and the vertical plastic drainage short plate; impacting and pressing a slag layer by using an impacting compactor, and the like. The invention overcomes the defects of high water content, low bearing capacity, difficult construction, and the like of vacuum prepressing soft foundation treatment and the defects of high expense, large repeated workload, long construction period, and the like of other methods. The invention has the advantages of strong bearing capacity, relatively simple construction, low expense, reduced workload, short construction period and obvious vacuum prepressing side sealing effect.

Description

technical field

[0001] The invention relates to a treatment method for ultra-soft soil foundation, in particular to a vacuum preloading method for a sandless cushion layer in a secondary circulation pipeline system. Background technique

[0002] With the rapid economic development of my country's coastal areas, using the rich tidal flat resources in coastal areas, the new land-making method of "blowing mud to backfill the site, vacuum preloading and solidifying soft foundation" has achieved certain results and saved a lot of mines And sand resources, protect the environment.

[0003] Before the present invention, it was exposed in the process of land reclamation, especially the vacuum preloading soft foundation treatment: the water content of the dredged silt soil is high, the bearing capacity is low, and the construction machinery and equipment are difficult to enter the site; The site treatment is not deep, the bearing capacity of the site after treatment is low, and the s...

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