The effect of irregular shape of ground surface on surface wve-based geotechnical survey

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420505
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Hiroshima University
• Principal Investigator: Ichii Koji 広島大学, 工学(系)研究科(研究院), 准教授 (70371771)
• Co-Investigator(Kenkyū-buntansha): Hata Yoshiya 大阪大学, 工学研究科, 助教 (80463561)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 表面波探査 / せん断波速度 / 盛土 / 矢板式岸壁 / 含水比 / ＦＥＭ解析

Outline of Final Research Achievements

The purpose of the study is to revail the applicability of geotechnical survey using surface-wave on the earth-structure with irregulra shape. First, the variation of the ground condition due to infiltaration of small particle in the ground and variatioj of water content in the ground is verified by laboratory tests. And the variaon of shear wave velocity profile in the ground were successfully measured in the sea-wall under tidal effect.
Then, FEM simulation of surface-wave propagation and field measurements were carried out at a sheet-pile type sea wall and an embankment. The irregulrat shape of sea wall (The gap of the heigh between sea side and ground side) have minor effect on the measurement restuls; however, the irregulra shape of embankment apparent ly affect the measurement results. This is related to the position of measuement line (sensors layout), and the computed results of different measurement lines can be used as possible correction factors.

Free Research Field

地盤工学