| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
A geomechanical method for estimating size of ancient pillar-supported structures is developed in this study to improve precision of current empirical estimation using radius and spacing of the pillar holes. As the past maximum stress history would be reflected on the current density and particle size distribution of the ground at the bottom of pillar holes, the developed method consists of field observation of the density and particle size distribution of the ground around pillar holes, laboratory tests on compressibility and crushability of the ground material and numerical back calculation. In this study, a constitutive model incorporating the effects of variations of density and particle size distribution is firstly developed and its validity is checked by comparing with past experimental evidences. A finite element code based on the proposed model is then developed and applied to back calculate the maximum load which used to act on the bottom ground of the pillar hole.
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