Superficial soft soil foundation rapid dynamic solidifying technology

Abstract

The present invention relates to a ground quick dynamic consolidation technique suitable for application on shallow soft soil. Said invention makes the dynamic consolidation theory be combined with vacuum water-reducing technique, and adopts an active water discharge mode of specially-made vacuum water-reducing system, etc. to accelerate the dissipation of excess hydrostatic pore-water pressure and discharge of pore-water before and after compaction and in the course of compaction, and combines the dynamic characteristics of saturated soft clay and strength-increasing law to improve the construction process and technical parameters of traditional compaction method so as to effectively raise consolidation effect and depth of the soil body.

Description

technical field [0001] The invention relates to a building construction method, in particular to a shallow soft soil foundation rapid dynamic consolidation technology. Background technique [0002] The traditional dynamic ramming method to strengthen the foundation mainly uses the powerful impact energy generated by the ramming hammer to generate strong vibration and stress inside the soil, resulting in the compression of pores in the soil, local liquefaction of the soil, and cracks around the ramming point, forming a good Drainage channels, pore water overflows smoothly, and the soil quickly consolidates, thereby achieving the purpose of reducing settlement and improving bearing capacity. It is generally believed that this method is especially suitable for the reinforcement of coarse-grained soil such as sandy soil, collapsible loess, and low-water content fill and clayey soil. For unfavorable soils such as saturated soft clay with large porosity, high water content, low p...

AI Technical Summary

Problems solved by technology

Under the construction technology of the traditional dynamic compaction method, the strong impact generated by the compaction will not only severely damage the original structure of the saturated soft clay, greatly reduce the strength of the original structure, but also lead to a significant decrease in its permeability, so that the pores The water pressure is difficult to dissipate and remains high, and the phenomenon of "rubber soil" appears in the upper soil, which makes the reinforcement fail

Therefore, the main reason for the phenomenon of "rubber soil" in saturated soft clay is that the ultra-static pore water pressure induced by tamping cannot be dissipated in time, and the tamping process of the traditional dynamic compaction method does not match the engineering characteristics and strength growth regularity of saturated soft clay.