Drainage consolidation method without keeping drainage channel after work of soft soil foundation

Abstract

The invention relates to a drainage consolidation method without keeping drainage channel after work of a soft soil foundation, which can be recycled by a system. The method comprises the following steps of: impacting to form a hole by using a high pressure gun; pressing and burying a vertical drain filter pipe into the hole; connecting a flexible seepage filer pipe with the vertical drain filter pipe; connecting the other end of the flexible seepage filter pipe with a horizontal branch drain; connecting the horizontal branch drain with a horizontal main drain; paving geotextiles, and paving vacuum films on the geotextiles; connecting the horizontal main drain with a vacuum pump for vacuumizing; and detaching the parts, filling left holes, filling slag, excavating gutters, and impacting and compacting the slag layer by using impact compactor. The method overcomes the respective defects of the pile foundation technology, composite foundation technology and consolidated drained technology. In the method, recyclable vertical drainage filter pipe and horizontal main and branch drain structures are adopted, the construction cost is reduced, the field settlement after work is decreased, the transmission channel for vacuum pressure is widened, and the consolidation speed of the reinforced soil is improved.

Description

technical field [0001] The invention relates to a soft soil foundation treatment method, in particular to a drainage consolidation method which does not leave a drainage channel after construction of the soft soil foundation which can be recycled. Background technique [0002] In recent years, the development and construction of coastal areas has accelerated, and tidal flats are becoming the main source of construction land in various places. The soil quality of tidal flats is mainly silt soil and cohesive soil, and its overall characteristics are high water content, strong compressibility, poor permeability, low bearing capacity, and deep distribution of soft soil layers. The natural elevation of tidal flats is generally relatively low, so it is first necessary to fill the site to a certain height for development and construction to meet flood control requirements. In recent years, the rich silt soil and cohesive soil resources of tidal flats have been often used, and the ...

AI Technical Summary

Problems solved by technology

In the foundation treatment, there are drainage channels to speed up the consolidation of the soft soil site; but after the construction, there are also drainage channels remaining in the soft soil, and the pore water in the underlying deep soft soil layer is continuously discharged through the drainage channels, and the pore water The pressure drops, and the site soil continues to undergo secondary consolidation and settlement after construction, causing damage to the upper foundation and structure, reducing the design life of buildings, municipal pipelines, and road surfaces, and resulting in high maintenance costs

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