Filling free vibroflotation method

Abstract

The invention relates to a filing-free vibroflotation method, characterized in setting the following vibroflotation parameters: a. setting the vibroflotation depth to more than differences between the hydraulic sand-filling level and the ground level, and less than differences between the hydraulic sand-filling level and the undisturbed soil level; b. setting the vibroflotation space to 2m-3m, and the vibroflotation hole site is arranged as an equiangular triangle; c. setting the vibroflotation dense current to 20A-25A; d. setting the vibroflotation time to 8s-10s in hole center, and 30s in hole bottom; e. setting the hydraulic pressure to 0KPa-50KPa when vibroflotation; f. setting the vibroflotation descent rate to 0m / min-2m / min, and the lifting rate to 1m / min-2m / min; g. setting the vibroflotation mode to double or triple. Processing powdered sand bed foundation by said method is simple, saves construction costs and has good consolidation effect.

Description

technical field

[0001] The invention relates to a method for stabilizing and reinforcing the foundation, in particular to a vibrating method without filler for treating the foundation of the fine sand layer. Background technique

[0002] At present, the 'filler-free vibrating method' technology used in domestic and foreign projects is only suitable for the treatment of coarse sand foundations and medium sand foundations with a clay content of less than 10%, and is not suitable for the treatment of saturated loose silt and fine sand foundations. Novelty search reports have also found no actual examples of applying the 'filler-free vibrating method' to treat large-area silt-fine sand foundations at home and abroad. Compared with the vibrating method with filler, the vibrating method without filler has the advantages of short construction period and low construction price. Projects such as ports, airports and roads often need to deal with large ar...