Foundation treatment method for reclamation project combined with layered drainage method

Abstract

The invention discloses a foundation treatment method for a reclamation project combined with a layered drainage method, comprising a mud blow filling layer, a sand blowing layer, a sand bedding layer, a rotary spray rod, a virtual drainage channel and a virtual drainage direction. The construction steps are as follows: blow filling sand with the thickness being 1-1.5m to a to-be-filled site, blowfilling the mud with the same design height; after standing still for 2-3 months, pumping the surface bleeding, preparing for vacuum pumping, paving geotechnical cloth, bedding a sand cushion with the thickness being 30-50cm, covering a sealing film, pumping, uncovering the sealing film, and carrying out the treatment of layered drainage method. Combined with the foundation treatment method of the layered drainage method, the invention has the advantages of vertical drainage water passing through three layers of foundation structures, namely the sand blowing layer, the mud blow filling layerand the sand bedding layer, so that the drainage distance of the foundation soil layer is shortened and a double-face drainage structure is formed. The foundation soil layer is cut into multiple horizontal drainage channels by the layered drainage method, so the drainage rate of the foundation is greatly quickened, the construction period is shortened and the project cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of sea reclamation and land reclamation, and in particular relates to a foundation treatment method for sea reclamation and land reclamation combined with a layered drainage method. Background technique [0002] Reclaiming land from the sea is an important means of solving construction land in coastal areas. The land area is usually formed by using the traditional sea reclamation land filling technology, but the dredger fill area has poor soil quality, high water content, low foundation bearing capacity, and settlement is not yet stable. Therefore, foundation treatment is required for the dredge fill area. Commonly used The ground treatment methods of eating and filling include dynamic compaction method and vacuum preloading method. The dynamic compaction method is suitable for sandy soil, and the vacuum preloading method is preferred for clay and silt geology. The conventional vacuum preloading method uses ...

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Problems solved by technology

The land area is usually formed by the traditional land reclamation technology, but the dredger fill area has poor soil quality, high water content, low foundation bearing capacity, and settlement is not yet stable. Therefore, foundation treatment is required for the dredger fill area. The foundation treatment methods of filling land include dynamic compaction method and vacuum preloading method. The dynamic compaction method is suitable for sandy soil, and the vacuum preloading method is preferred for clay and silt geology. The conventional vacuum preloading method adopts the surface layer of sand and plastic The membrane is vacuumed, the drainage time is relatively long, and the efficiency of foundation treatment is low

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