Disaster prevention measures in the buried pipeline based on the extraction damage analysis result of mechanical joints caused by the earthquake

2015 Fiscal Year Final Research Report

• Project/Area Number: 25282118
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Nagoya University
• Principal Investigator: KITANO Tetsuji 名古屋大学, 減災連携研究センター, 寄附研究部門教授 (90644849)
• Co-Investigator(Kenkyū-buntansha): KATAGIRI Shin 摂南大学, 理工学部, 教授 (10554412) ; MIYAKOSHI Jun'ichi 名古屋大学, 減災連携研究センター, 寄附研究部門准教授 (00393570) ; NONAKA Toshihiro 名古屋大学, 減災連携研究センター, 寄附研究部門助教 (40644852)
• Research Collaborator: YASUI Motoyoshi ; TERASHIMA Takanori ; FUJITA Shusuke ; OGURA Hitoshi ; KUZE Shinichiro
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 埋設管・鋳鉄管 / メカニカル継手 / 損傷メカニズム / 被害統計分析 / 液状化地盤 / ライフライン / スラストブロック / 数値解析

Outline of Final Research Achievements

Water and city gas is an important lifeline is to supply water and gas by using a buried pipeline. Among a wide variety of buried pipeline, cast iron mechanical joint pipe is used in important trunk line to transport the water to the far region from the important bases.
In the case that the withdrawal break of this mechanical joint occurred, the impact of the damage is spread to the entire supply network. So by focusing on the joint withdrawal damage of mechanical joints, specific damage occurred conditions based on damage data in the previous earthquake and the construction of a pipeline damage discriminant from the statistical analysis were performed. In addition, by applying the results of this research in Aichi Prefecture 250 mesh areas, it was to identify the areas where damage may occur. It was further clarified by using a numerical analysis for the development process and damage mechanism of joint withdrawal damage.

Free Research Field

ライフライン地震工学、パイプライン工学