A construction method of vacuum preloading consolidation drainage

Abstract

The invention relates to a vacuum preloading solidification drainage construction method. Adopted drainage channels comprise a plurality of upper drainage pipelines and a lower drainage pipeline, the adjacent drainage pipelines are connected in a sealed mode, and holes used for drawing water are formed in the lower drainage pipeline. The construction method comprises the steps that a cushion layer is laid on a sludge layer on site, and a thin film is laid on the cushion layer; the first lowermost upper drainage pipeline of the drainage channels is connected with the lower drainage pipeline in a sealed mode, pipe shoes are arranged, the pipelines are vertically inserted into a hole of the thin film to reach the height allowing to be connected with the next pipeline conveniently, and it is guaranteed that the whole drainage pipelines are vertical; the second upper drainage pipeline and the first upper drainage pipeline are connected in a sealed mode; pipe inserting continues to be carried out, and the other upper drainage pipelines continue to be connected in a sealed mode until the depth required by the design is met; the upper drainage pipeline at the upper end and a water filter pipe are connected, and water drainage is carried out through a vacuum pump combined with negative pressure. According to the method, water drainage solidification can be carried out a soft foundation with the high water content, and the problem that horizontal bending deformation happens to a drainage plate in the drainage construction process can be effectively solved.

Description

Technical field [0001] The invention belongs to the technical field of vacuum preloading consolidation drainage, and relates to a vacuum preloading consolidation drainage construction method. Background technique [0002] The vacuum preloading method is to lay a sand cushion on the surface of the soft ground that needs to be reinforced, then bury the vertical drainage pipe (drainage board), and then use an airtight sealing film to isolate it from the atmosphere. The suction pipe buried in the cushion is pumped by a vacuum device to form a vacuum. At this time, the pore water in the muddy soft soil will seep due to the pressure difference generated, and the water will be discharged from the drainage pipe. As the water content decreases, the effective stress of the foundation increases, and the silty soil will consolidate. [0003] At present, the conventional drainage board is composed of a plastic core board and a filter membrane jacket. Although the application of this co...

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Problems solved by technology

[0004] In order to solve the problem of the bending deformation of the drainage plate and the rapid decrease of the negative pressure value with the depth in the conventional vacuum preloading consolidation drainage construction process, the present invention provides a construction method of pulling out the consolidation drainage plate

The construction method provided by the invention can not only well consolidate the drainage of the soft ground with high water content, but also effectively solve the problem of horizontal bending and deformation of the drainage board during the drainage construction process

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