| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for readily visualizing stress acting on the ground for understanding the stress. SOLUTION: A pressure-sensitive color developing section 5 formed by encapsulating a dye or pigment into a plurality of types of microcapsules 8, having different rupture strengths is provided on the outer circumferential surface of a rigid body 4 having a spherical shape to form a pressure-sensitive color developer 3. The pressure-sensitive color developer 3 is buried in the ground. The stress acting on the ground is visualized three-dimensionally by the color developing region and the color-developing density of the pressure-sensitive color developing section 5 that develops color, by having the microcapsules 8 broken, according to the stress acting on the ground. COPYRIGHT: (C)2011,JPO&INPIT
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