Reinforcing method for demixing sole weight, prepressing water discharge concretion combination dynamic consolidation soft ground base

Abstract

A dynamic compaction soft foundation reinforcing method by combing layered dead weight and pre-pressing drain concretion includes: filling a water-isolation cofferdam; a water collecting well is arranged in the middle of the cofferdam; a sand layer of 0.5m to 0.8m is filled by hydraulically filled or manually filled on the original water-drained ground; a horizontal drain pipe is embedded in the sand layer to carry out first earth hydraulic filling; a drain pump is arranged in the water collecting well to continuously drain water; when the thickness of hydraulic filling reaches the designed elevation of the first layer, the hydraulic filling is stopped; when the surface of the hydraulic filling earth forms a hard shell layer with a thickness of 30m to 40m under the actions of vaporizing and dead weight drain, the hydraulic filling to a second layer and a third layer are carried out according to the steps; even a required hydraulic filling height is designed; finally hill-skill soil or mixed backfill soil and sandy soil are back filled on the layers; dynamic compaction is carried out after leveling. The invention has the technical economic indexes of fast speed, saving investment, small settlement after construction and high surface layer bearing capacity, etc., and has remarkable technical advantages on lower ground elevation and the projects of polder reclamation by hydraulically fill the soft soil like silt.

Description

technical field [0001] The invention relates to the field of foundation treatment of construction engineering, in particular to a soft soil foundation reinforcement method combined with multiple foundation reinforcement methods. Background technique [0002] With the implementation of my country's port development plan and sea reclamation plan and the continuous development of economic construction in the east coast, the scale of land reclamation from sea reclamation will increase day by day. In order to quickly develop these new lands, the rapid reinforcement of the saturated soft soil foundation filled by dredging has attracted the attention of domestic engineering circles. [0003] At present, the conventional reinforcement treatment methods for saturated soft soil, especially the newly filled silt soil with extremely high water content, such as vacuum preloading method, surcharge preloading method, vacuum-surcharge combined preloading method, and even patented Technolog...

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Problems solved by technology

[0005] The invention provides a soft soil foundation reinforcement method combined with layered self-weight, preloading drainage consolidation and dynamic tamping, the main pu...

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