Vacuum prepressing method having alternating type air exhaust

Abstract

The invention discloses a vacuum prepressing method having alternating type air exhaust. Each drain board is connected with corresponding drain branch pipes through bowknots, wherein all the drain branch pipes are arranged side by side; a first row of the drain branch pipes is set to be 1, a second row of the drain branch pipes is set to be 2, and the rest can be done in the same manner. The vacuum prepressing method is characterized in that two main pipes arranged side by side are adopted, wherein one of the main pipes is a first main pipe, and the other one is a second main pipe; the drain branch pipes in an odd number are connected with the first main pipe; the drain branch pipes in an even number are connected with the second main pipe; and two main pipes are respectively connected with different jet pumps, so that the situation of alternating type air exhaust of two jet pumps is realized through utilizing a controller. According to the vacuum prepressing method disclosed by the invention, the situation that the drain boards are silted untimely can be avoided.

Description

technical field [0001] The invention relates to a vacuum preloading method for alternate pumping Background technique [0002] With the rapid development of my country's national economy and the integration of the global economy, domestic coastal cities urgently need a large number of ports and waterways. There was an upsurge of reclamation and land reclamation, and the dredging land formed by channel dredging was often used as the foundation for land reclamation. [0003] The foundations of most artificial ports are deep dredging and filling ultra-soft soil formed by dredging silt. The clay content of particles with a particle size of less than 0.005mm is between 30% and 50%. It has high water content, large void ratio, low strength, High compressibility, low permeability and rheological properties. This kind of dredger fill foundation cannot meet the basic conditions required for engineering construction, and the consolidation of supersoft soil under its own weight will t...

AI Technical Summary

Problems solved by technology

[0009] (1) Although the design of the filter membrane can improve the clogging effect to a certain extent, it cannot fundamentally solve the clogging problem

[0010] (2) The air pressure splitting method is analyzed in principle to prevent the silting of the drainage plate to a certain extent, but in engineering practice, it is not sure in what depth range the air pressure splitting is performed on the soft soil foundation, and the anti-silting effect is the best Good, still in the exploratory stage

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