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Volume 20 (1983 - 198･･･
- Issue 4 Pages 1-
- Issue 3 Pages 1-
- Issue 2 Pages 1-
- Issue 1 Pages 1-
Volume 20, Issue 4
Displaying 1-5 of 5 articles from this issue
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Seiichi GIBO, Aritsune TAKEI, Seiryo KOHAGURA1984 Volume 20 Issue 4 Pages 1-6_1
Published: June 25, 1984
Released on J-STAGE: February 25, 2011
JOURNAL FREE ACCESSThe strength parameters obtained from shear tests are only treated as reference data in the stability analysis of the landslide. In order to increase accuracy of the analysis, these parameters are directly or indirectly necessary for the estimation of design strength parameters.
In the present report, paying special attention to the slickenside and fully softened clay seams in the slip surface and joint surface, the authors pointed out the significance of the relation between the shear stress mobilized along the slip surface and three strengths, namely the residual, peak and fully softened strengths. They also proposed methods to determine the parameters of average shear strength, where the residual strength and other strengths, Mohr-Coulomb equation, and the residual factor R were all introduced into the c'-φ'relationship that was obtained by the back analysis. Last of all, rationality of the abovementioned methods was also confirmed by applying the methods into examples of actual landslides.View full abstractDownload PDF (1060K) -
Bungo TAMADA1984 Volume 20 Issue 4 Pages 7-13_1
Published: June 25, 1984
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis paper describes the experimental results that the angle of internal friction of the landslide clay on the slide surface is not affected very much by grain size distribution, but contens of clay minerals are in flueced considerably and the content of montmorillonite has the greatest influence.
The relationship between the angle of internal friction φ' and the content of montmorillonite Bn is shown as follows.
φ=φ0;exp (-A·Bn)
Bn≤40%
where φ0 and A are the constants determined by the kinds of the minerals contained (excluding clay minerals).
The experimental results can be applied to the exploration of slide surface and the estimated values of angle of internal friction on the slide surface.View full abstractDownload PDF (1086K) -
Toshiaki SHIBAHARA1984 Volume 20 Issue 4 Pages 14-21_1
Published: June 25, 1984
Released on J-STAGE: February 25, 2011
JOURNAL FREE ACCESS -
Take the case of the Oh-ishi landslide areaAtsuo TAKEUCHI, Toshio NINOMIYA, Kazuhiro NAKAMURA, Ikuo UENO1984 Volume 20 Issue 4 Pages 22-27_1
Published: June 25, 1984
Released on J-STAGE: February 25, 2011
JOURNAL FREE ACCESSInvestigating method of one-meter-meter-depth temperature measurment was carried out in the Oh-ishi landslide area belonging to the metamorphic rocks zone for the first time in February 1980. On the basis of the results, groundwater drainage works were carried out. In this time, the investigating method was carried out again in the same area in February 1983 for examining the reproducibility of temperature distribution and the introduced variation by groundwater drainage works.
As the results, next matters were shown:
1) The reproducibility of the temperature distribution was recongnized clearly in a landslide area belonging to the metamorphic rocks zone.
2) The effectiveness of groundwater drainage works was recognized satisfactorily by the observed results of groundwater level and the quantity of drainage in groundwater-vein streams.
3) The possibility of judging the effectiveness of groundwater drainage works was shown by comparingwith the φz=1-y diagrams and the distributing diagrams of underground temperature before and aftergroundwater drainage works.View full abstractDownload PDF (975K) -
[in Japanese], [in Japanese]1984 Volume 20 Issue 4 Pages 28-33
Published: June 25, 1984
Released on J-STAGE: February 25, 2011
JOURNAL FREE ACCESSDownload PDF (1153K)
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