| 摘要 |
PROBLEM TO BE SOLVED: To provide a soil improvement method in which soil improvement by injection of a bubble-containing liquid is achieved economically and easily by comprehending an unsaturation state of the soil in real time.SOLUTION: Soil is made unsaturated by injecting a microbubble-containing liquid into a predetermined region of the soil where liquefaction is predicted so as to prevent liquefaction. The target degree of unsaturation is set, an amount of gaseous air of necessary volume is set, and a microbubble content of the microbubble-containing liquid and/or an injection amount of the microbubble-containing liquid and/or a loss rate are so set as to satisfy the amount of the gaseous air, thereby improving the soil. A gas content of microbubbles in the microbubble-containing liquid is calculated, and an amount of gas of microbubbles is calculated from the injection amount of the microbubble-containing liquid injected into the soil, or further the loss rate is taken into consideration to calculate the degree of saturation of the injection-target soil. |
