Development of a geomechanical method for estimating size of ancient pillar-supported structure

2014 Fiscal Year Final Research Report

• Project/Area Number: 24650588
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Cultural property science
• Research Institution: Yokohama National University
• Principal Investigator: KIKUMOTO Mamoru 横浜国立大学, 都市イノベーション研究院, 准教授 (90508342)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 掘立柱建物 / 密度 / 粒度 / 粒子破砕 / 構成モデル / 有限要素法 / 数値解析 / 柱穴

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.

Free Research Field

地盤工学、応用力学、文化財科学