Abstract
The earth pressure shield method can be applied to various kinds of soil, but a certain countermeasure is needed to prevent the gush of water at the gate of soil removal with excavating some types of soils such as granular soil.
The “Silica shield method” uses silica jelly as an additive to solve the above mentioned problem.
This report describes the various effects of silica jelly such as improvement of fluidity of excavated granular soil, the optimum mixing ratio of silica jelly and the safety features.
