Multiple pressurizing fast consolidated compacting soft earth foundation treatment method

Abstract

The invention in a technical sphere of soft soil ground treatment in geotechnical engineering relates to a soil ground treatment method in the areas along the sea, the river and the lake. The invention combines a vacuum drainage, a compaction via vibration supercharging, and a compaction via dynamic consolidation supercharging, wherein a higher kinetic head gradient which is consisted of a positive pressure of excess pore water by vibration excitation and a vacuum negative pressure firstly discharges the water in soil and increases the water content in the soil, thereby compacting the soil to a certain extend, and then the dynamic consolidation action is proceeded to improve the excess pore water pressure and form the higher kinetic head gradient thereby draining and compacting the soil. All the steps are proceeded many times to eliminate the settling of the worked deep layer soft soil and to improve surface consolidation degree, intensity, and stiffness until up the design requirement. Compared with the present method, the invention not only has a short time for a project, lower manufacturing cost and settling after work, and a good effect of consolidating and compacting, but also is extensive used in the soft soil ground treatment of various projects in the area along the sea, the river, or the like.

Description

technical field [0001] The invention belongs to the technical field of soft soil foundation treatment in geotechnical engineering, and in particular relates to a method for treating soft soil foundation along rivers, rivers and lakes. Background technique [0002] (1) Soft ground treatment has broad application prospects [0003] With the reduction of available land in cities and the enhancement of people's awareness of environmental protection, in recent years people have increased the number of soft foundation projects along the coast, rivers and rivers (for example: Qingdao Hercy Bay Beihai Shipyard, Shenzhen Airport Expansion, Shanghai Nanhui District Lingang New City, Shanghai Changxing Island Shipbuilding Base, Tangshan Caofeidian Shougang Relocation Project, etc. are all constructed on soft foundations). Most soft soils usually have high water content, high compressibility, and poor permeability, so they must be treated to meet the requirements of use. From the persp...

AI Technical Summary

Problems solved by technology

The surcharge preloading method refers to temporarily filling soil and rocks on the site, loading preload on the foundation treatment, so that the foundation settlement can be completed in advance, and the foundation bearing capacity is improved through foundation soil consolidation, and the preload is removed after reaching the requirements This method has three deficiencies: first, it requires a large amount of earth and rocks nearby, and the cost is relatively high; second, if the piled-up height is too high, it will cause slope stability problems; and third, the construction period is relatively long.

The advantage of this method is that the construction period is short and the strength is significantly improved, but it is generally only suitable for non-cohesive soil, miscellaneous fill soil, unsaturated cohesive soil, etc., and it is not suitable for soft soil with high water content and extremely low strength.

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