Abstract
The countermeasure method against liquefaction by decreasing the saturation degree of soil has the features of low cost, simple procedure and environment friendly. Although it is well known that the soil resistance to liquefaction increases as the saturation degree of soil decreases, it has been difficult to lower the saturation degree of ground homogeneously. A technique using micro-bubbles can be expected to solve these problems because the micro-bubbles can easily permeate into the voids among sand particles.
A series of tests for saturated sand injected with the water mixed with micro-bubbles was conducted. Based on these test results, factors influencing on decreasing the saturation degree of ground were examined and the feasibility of the micro-bubble injection method was studied in this paper.
