Journal of the Japan Society of Engineering Geology

On the Effects of Slaked Lime Pile Based on the Experimental Studies

Kazuo Suzuka, Kaigo Iwai

1972 Volume 13 Issue 1 Pages 1-7
Published: March 01, 1972
Released on J-STAGE: June 04, 2010

DOIhttps://doi.org/10.5110/jjseg.13.1

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As a method of soil stabilization, the effects of quick lime pile have been reported by many investigators. This method makes use of the chemical properties of quick lime, but these properties are unstable.Therefor, works by using quick lime and the preservation of it are difficult.For this reason, the writers have made experimental studies on the effects of slaked lime pile.As the results, the effects of pile diameter and pile density have been made clear.

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Geological Character of Mutsu-Ogawara Area Aomori Prefecture

Zenkichi Onuma

1972 Volume 13 Issue 1 Pages 8-22
Published: March 01, 1972
Released on J-STAGE: June 04, 2010

DOIhttps://doi.org/10.5110/jjseg.13.8

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Mutsu-Ogawara area, Aomori Prefecture is hopeful about the future as large industrial base. We serveyed this area to fit from geology and ground for industrial site.
In conclusion, we found that this ground is quite good when compared with some other areas.

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Land Subsidence Phenomena in the Southern Part of Saitama Prefecture During Recent Years (1968-1971)

Rokuro Morikawa

1972 Volume 13 Issue 1 Pages 23-28
Published: March 01, 1972
Released on J-STAGE: June 04, 2010

DOIhttps://doi.org/10.5110/jjseg.13.23

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Formerly, subsidence area over 100 mm were almost restricted in Kawaguchi and Nakagawa lowlands, but recently such remarkable subsidence has been observed in Musashino and Kitaadachi uplands and attained 200mm near Asaka city. This phenomenon may be related the compaction of delvial deposits.

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Quantitative Analysis of Landslides in Respect to Terrestrial Features

Seiken Ogata

1972 Volume 13 Issue 1 Pages 29-34
Published: March 01, 1972
Released on J-STAGE: June 04, 2010

DOIhttps://doi.org/10.5110/jjseg.13.29

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As the movement of failured detritus of land slump in the steeper mountain slope is more rapid than in the gentle one, land slumps have distinguished between landslides and landcreeps.Analysis of terrestrial properties in respect to landslides is made in this paper.
A process of landsliding begins with the grow out of failure, developes with expansion of failured area and ceases with diminution of unstable portion and recovering of the vegitation.In a certain terrain, it contains some landslides of various age in the sequence of a process and numbers of landslides n (t) successively changes as following function
where U is a increment numbers of landslides a year and K is a decrement ratio of landslides a year.
The ultimate numbes of landslides in a certain terrain leads to U/K, as equilibrium numbers which is defined in this paper.
The average length of the landslide life v is given, using K, as follows
Terrestrial features involing stability against landsliding and volume estimation of failured detritus can be evaluated using U, K and z, for they are constant in a certain terrain which depend on multiple factors of geological, topographical and climatic conditions.
The variation of constant concerning different geological factors in two terrains in which granite and volcanic rocks underlain, is discussed.

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