Dry-sand preconsolidation vibrating foundation reinforcing method

Abstract

The invention relates to the technical field of foundation reinforcing treatment, in particular to a dry-sand preconsolidation vibrating foundation reinforcing method. The dry-sand preconsolidation vibrating foundation reinforcing method comprises the following steps of backfilling loose dry sand on a construction site, conducting water filling soaking on backfilled loose dry sand which is arranged below the surface layer in a layered mode, guaranteeing that water filling soaking is not conducted on surface-layer backfilled loose dry sand, embedding a tube well simultaneously, arranging the intervals of vibroflotation points, selecting a vibroflot to conduct vibro-densification and solidification on the backfilled sand, conducting water discharging on the backfilled sand after vibro-densification is conducted, conducting roller compaction densification through a high-power vibratory roller, and conducting water discharging on multiple well points. The dry-sand preconsolidation vibrating foundation reinforcing method improves the bearing capacity of the backfilled loose dry sand, effectively reduces the deformation amount of a foundation, improves the usable value of the surface-layer backfilled loose dry sand, and reduces production cost.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement treatment, in particular to a dry sand pre-densification vibration foundation reinforcement method. Background technique [0002] At home and abroad, for the foundation reinforcement of backfilling loose dry sand in large-area deep and thick layers, according to the traditional construction technology, vibrating compaction method or layered backfill rolling method is generally used. In recent years, watertight method has appeared in coastal areas, but each The construction technology has its deficiencies in the treatment of the above-mentioned backfill soil layers. The strength of the foundation surface in the range of 1-1.5m treated by the vibrating compaction method is low, and the surface soil needs to be excavated when the upper part is designed; the layered backfill rolling method is greatly affected by the rainfall weather, and after the rainfall, the backfilled sand needs t...

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Problems solved by technology

[0002] At home and abroad, for the foundation reinforcement of backfilling loose dry sand in large-area deep and thick layers, according to the traditional construction technology, vibrating compaction method or layered backfill rolling method is generally used. In recent years, watertight method has appeared in coastal areas, but each The construction technology has its deficiencies in the treatment of the above-mentioned backfill soil layers.

The strength of the foundation surface in the range of 1-1.5m treated by the vibrating compaction method is low, and the surface soil needs to be excavated when the upper part is designed; the layered backfill rolling method is greatly affected by the rainy weather, and the backfilled sand needs to be dried after the rain Construction can only be done after a certain period of time, otherwise it will affect the compactness of the backfill sand, the construction period will be longer, and the cost will be higher; the watertight construction requires a large amount of water

At present, there is no foundation reinforcement method that mainly uses loose dry sand as the backfill material, which has high surface strength, is less affected by rainfall, and requires less water.

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