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Volume 37 (1996 - 199･･･
- Issue 6 Pages 434-
- Issue 5 Pages 374-
- Issue 4 Pages 247-
- Issue 3 Pages 150-
- Issue 2 Pages 84-
- Issue 1 Pages 2-
Volume 37, Issue 5
Displaying 1-7 of 7 articles from this issue
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Kaname TAJIRI, Hiroshi NAKAYAMA, Shojiro ARAMAKI, Shigeyoshi IMAIZUMI1996 Volume 37 Issue 5 Pages 374-383
Published: December 10, 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSThe engineering objective of statistical evaluation of factors concerning slope failure is to predict failure zones of a particular region by referring to the result of the case study analyses. Therefore, while generalizing those factor categories, maintaining high degree of universality in such evaluations is indispensable. Especially in geological factors, it is vitally important to consider this sufficiency. In this respect, our reserch is aimed at examining the applicability of the intermediate classification of geological factors in statistical analysis and its adequacy as an evaluation tool. Comparison of each analysis based on both minor and intermediate classifications is made, applying quantification method II. The results indicate that, (1) as far as multivariate analysis in slope failure is concerned, the intermediate classification of geological factors is very much justified from a view point of generality in classification and universality in analytical evaluation; and (2) in regions with geological features containing fairly large lava boulders, a classification that takes into account the formation process may be indispensable.View full abstractDownload PDF (1695K) -
The Structure and Origin of Conical Hills on Nirasaki Mudflow, JapanHideo KASAI1996 Volume 37 Issue 5 Pages 384-395
Published: December 10, 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSThe author carried out the VLF-MT survey to investigate the details of the geological structure of the Shimpu Castle Hill, which is located on the Nirasaki mud flow at the southern foot of Mt. Yatsugatake, Yamanashi Prefecture, and interpreted the obtained VLF-MT data on the assumption of two layers, according to the model based upon the distributions of the observed phase angle and resistivity. The upper layer of 700 to 1, 000 ohm meters forms the hill, and the lower one of 250 ohm meters consists of tuff breccia and forms the Nirasaki plateau. Furthermore, a high resistivity zone is observed at the northern part of the hill, and it is a dike rock. These results indicate that the Shimpu Castle Hill is a small volcano.View full abstractDownload PDF (2239K) -
A Case Study of the 1995 Hyogo-ken Nanbu EarthquakeTakahito KUROKI, Kazuya AKIYAMA, Yasuhiko WAKIZAKA1996 Volume 37 Issue 5 Pages 396-409
Published: December 10, 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSBasic problems of a distribution map of the damaged area, caused by an earthquake are the influence of vacant areas of buildings and the strength of extraordinary of buildings in initial distribution maps for each building. We need to remove them to assess the distribution of damaged area by averaging the distribution of each damaged building.
In this study, we discussed the counter method for averaging the distribution. In general, a counter method is a method to make a contour map of separate planes like a bedding plane using a circle window. In this study, a square window is employed as a counter. The method consists of 7 rules for drawing reasonable boundary lines of selected main damaged areas. Because the counter size affects the figure of the boundary line of damaged areas, we must select a suitable counter size for averaging the distribution of damaged buildings. We observed the distribution maps made by various size counter, and compared between the maps and geomorphological maps.
In the case of the distribution map of damaged buildings caused by the 1995 Hyogo-ken Nanbu Earthquake, we could remove the influence of vacant areas and extraordinary buildings by the counter method. Furthermore, averaging a distribution map of damaged areas by the above method clarified our understanding of the relationships between geomorphological and/or geological factors and earthquake hazards.
These results show that the counter method is useful for averaging a distribution map of damaged area.View full abstractDownload PDF (6819K) -
Ryuji KITAGAWA, Hirotsugu NISHIDO, Motoi INOUE, Masayuki MONDO1996 Volume 37 Issue 5 Pages 410-414
Published: December 10, 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSDownload PDF (5012K) -
Aiming LIN, Shinichi UDA, Takao MIYATA, Kenshiro OTSUKI, Jun MINAGAWA1996 Volume 37 Issue 5 Pages 415-419
Published: December 10, 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSAfterslip is the growth of slip on a surface fault at a decaying rate following co-seismic subsurface rupture. Continual measurements of surface slip have been made across the trace of the Nojima Earthquake Fault on the Nashimoto location during 19 January, 1995 to 10 May, 1996, for determining whether afterslip was occurring or not following the main shock. The observed results show that the afterslip was not been detected, which coincides with the previous observation made by GPS and laser wave.View full abstractDownload PDF (1685K) -
1996 Volume 37 Issue 5 Pages 431a
Published: 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSDownload PDF (69K) -
1996 Volume 37 Issue 5 Pages 431b
Published: 1996
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSDownload PDF (69K)
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