地盤調査に求められている課題 : 信頼設計に基づいた地盤定数の設定(<小特集>地盤調査・計測における先端技術)

概要

論文の詳細を見る
Design methods based on reliability have been gradually applied to geotechnical design, instead of specified requirement. However, the outline of reliability analysis has been developed on steel or concrete material, which are manufactured under strict quality control. Since properties of natural ground are completely different from these materials, it is anticipated that many problems may be caused when the reliability analysis is directly applied to geotechnical design. In this paper, four case histories are presented: two for clay, one for medium soil and sandy ground. These case histories indicate importance of geotechnical consideration for determination of design parameters. In addition, the paper insists importance human error due to lack of sampling technique, employment of unsuitable laboratory testing for evaluation of design parameters. Cone penetration test (CPT) has great possibility to provide geotechnical parameters for reliability analysis, because of nearly freedom from human error and continuity of measured value to depth.
2007-11-01