Journal of the Japan Society of Engineering Geology
Online ISSN : 1884-0973
Print ISSN : 0286-7737
ISSN-L : 0286-7737
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Volume 48, Issue 6
Displaying 1-6 of 6 articles from this issue
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  • Landslides on Ancient Burial Mounds Induced by the 1596 Keicho-fushimi Earthquake
    Toshitaka KAMAI, Akira SANGAWA, Haruo SHUZUI
    2008 Volume 48 Issue 6 Pages 285-298
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.285
    JOURNAL FREE ACCESS
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    Landslides of ancient burial mounds, the Imashiro-zuka and the Nishimotome-zuka, induced by the historical earthquake corresponding to the tectonic movement of the active fault systems from northern Osaka to Kobe were discussed. Obvious interior structures of landslides revealed the deformation process of the landslides, and provided the significant information to discuss the landslide mechanism. The geological conditions of the basement of the mounds, the lithology, stiffness of the basement, and the position to the fault systems, should be significant to collapse of the mounds. Landslides of the embankments (fills) should be unavoidable over a long period of time when any weakness is shown in the basement of the mounds, in other words, the total quality of artificial soil structure much depends on the conditions of its basement. The ancient burial mounds in Kinki district were distributed from coastal region to hills overlapping the modern urban regions. The landslides of the ancient burial mounds indicate the important issues of our modern society.
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  • Risk Analysis of Geologic Survey using 3 Dimensional Modeling
    Yoshitaka HAYASHI, Hidemasa OHTA
    2008 Volume 48 Issue 6 Pages 299-303
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.299
    JOURNAL FREE ACCESS
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    Geologic Model is used to make by engineers on his own carriers based on Geologic principles. On the other hand, 3D automatic geologic modeling softwares are dramatically developed in recent years. The softwares directly generate geologic boundary or rock classification in three dimensional fields from borehole logs that have been classificated by engineers. More over, some of them have GEO-STATISTIC features which indicate statistical probability or uncertainty. Authors present three case studies, 1. Risk analysis on geologic survey, 2. Hierarchy on risk and 3. Risk communication, by using these GEO-STATISTIC features.
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  • Analysis of Disaster Features using Slope Disaster Database of National Roads
    Yoshinori YAJIMA, Yasuhito SASAKI, Toshiyuki KURAHASHI
    2008 Volume 48 Issue 6 Pages 304-311
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.304
    JOURNAL FREE ACCESS
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    We developed a slope disaster database of national road which includes 1, 310 slope disasters information that occurred from 1990 to 2004. And we analyzed relationships among topographical geological properties, rainfall and slope disasters.
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  • Development of Roadside Landslide Hazard Map
    Toshiyuki KURAHASHI, Yoshinori YAJIMA, Yasuhito SASAKI, Shunji KATO
    2008 Volume 48 Issue 6 Pages 312-317
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.312
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    This paper reports a result of roadside landslide disasters along national highways from the year 1996 to the year 2004, and we describe that a roadside landslide hazard map is useful to prevent highways from disasters.
    Ministry of Land, Infrastructure and Transport (MLIT) encountered 477 landside disasters with road traffic closures on national highways in the past fifteen years after the campaign. We divided 477 disasters into groups by both of evaluation ranks and disaster types. It results that half of disasters occurred at non-predictive sites in the former road facility inspection campaign of MLIT.
    In order to solve these problems, we applied a roadside landslide hazard map to a road in a mountain. The hazard map shows weakness in heavy rainfall and countermeasure on roadside at a glance. The hazard map integrated results of road facility comprehensive inspection, daily patrol and disaster records into a map at a scale of 1: 5, 000. Weakness is a causative factor of landslides such as such as rock-fall, slope failure, rock-mass failure, debris flows, and so on. These were recognized as geographical features by air-photo interpretation. In the other hand, countermeasure shows roadside slope stability. These countermeasures are divided into three ranks on a guideline of road facility comprehensive inspection in 1996.
    It resulted that our hazard map newly picked up 8 slopes along the highway. The map was useful to evaluate risks to a highway effectively.
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  • Geological Risk and Decision Making for Project Implementation
    Yoshiki ONOI
    2008 Volume 48 Issue 6 Pages 318-323
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.318
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  • Estimation and Evaluation of Ground-related Disasters due to Earthquakes.
    Case Studies from the 2005 Fukuoka Seiho-oki Earthquake and 2007 Noto Peninsula Earthquake
    Kozaburo FUKUZUKA, Yuji KANAORI
    2008 Volume 48 Issue 6 Pages 324-330
    Published: February 10, 2008
    Released on J-STAGE: March 26, 2010
    DOIhttps://doi.org/10.5110/jjseg.48.324
    JOURNAL FREE ACCESS
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