応用地質

トンネルの機械化掘さくと地質

国鉄北陸本線木ノ浦トンネルにおける, トンネル掘進機の試験

吉川恵也, 田中敏夫, 三沢清扶

1968 年 9 巻 2 号 p. 66-80
発行日: 1968/06/10
公開日: 2010/06/04

DOIhttps://doi.org/10.5110/jjseg.9.66

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We used tentatively a Rock Tunneling Machine on the bottom drift of Konoura Tunnel in Japanese National Railways (double track railway tunnel).
The purposes of the test were the evaluation of suitability of the machine against geological condition and investigation of economical advantage of machine tunneling method.
Rocks in the tunnel are mudstone and tuffacious mudstone which belong to Miocene, Tertiary, and then those compressive strength are 80 to 130kg/cm² and those seismic speeds at the site are 1.8 to 2.2km/sec.
The machine (bore diameter 2.3m) was Robbins type and was being built in the Komatsu Mfg. Co. it was successful on the test excavation. The total length of the excavating by the machine were 987.6m and rates of advance were 24.6m/day at maximum and approximately 350 m/month in average.
This paper describes that:
(1) Relation between cutter type and rock properties.
(2) Relation between advance of excavation and rock properties.
(3) Deformation of ground and surface of the drift after excavation on the machine and ordinary tunneling method.

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泥質岩の含水による強度変化

田中芳則

1968 年 9 巻 2 号 p. 82-93
発行日: 1968/06/10
公開日: 2010/06/04

DOIhttps://doi.org/10.5110/jjseg.9.82

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Many uniaxial and diametrical compression tests have been performed by consecutively decreasing the moisture in the tertiary mudstone, the most typical of the “Nangan”, and the relation between the moisture content and the strength of the mudstone was examined. As a result of the test, it was found that the relation might be classified as coming under a change which systematically corresponds with the specified grouping system and its progress in the lithyfication process.
Moreover, since the internal friction angle is constant for the most part in the moisture content, it can be said that the cohesion giving the constituent grains the strength to bring about the change in the mudstone, has the greater influence on the strength change

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正誤表

1968 年 9 巻 2 号 p. 103-104
発行日: 1968年
公開日: 2010/08/24

DOIhttps://doi.org/10.5110/jjseg.9.2_103

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正誤表

1968 年 9 巻 2 号 p. 104
発行日: 1968年
公開日: 2010/08/24

DOIhttps://doi.org/10.5110/jjseg.9.2_104

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