巻号一覧
9 巻 (1968)
- 4 号 p. 147-
- 3 号 p. 105-
- 2 号 p. 66-
- 1 号 p. 1-
9 巻, 1 号
選択された号の論文の3件中1～3を表示しています
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大西 千秋1968 年 9 巻 1 号 p. 1-36
発行日: 1968年
公開日: 2010/06/04
ジャーナル フリー本論文は, 瀬戸内花崗岩体に属する中国四国連絡送電線高鉄塔基礎地盤について, 次の緒言に示された著者の行なった各種調査のうちで, 特にその地盤を構成する風化花崗岩いわゆる真砂体の外力に対する変形特性を見出すために, 4か所において表面下深度2mから最大深度13mまでの間の数階のレベルにおける自由表面で載荷実験と最終深度における繰返し載荷実験とを行なって得られた結果と, その解析およびそれらに対する考察を述べたものである。
載荷実験をかくの如く数階のレベルで行なったのは, 鉄塔基礎の許容支持力地盤が現われるレベルを見出すためである。また繰返し載荷実験は風圧の変化により鉄塔が傾動し, これが基礎地盤におよぼす繰返し荷重に対処するための基礎資料を提供する目的を持つものである。抄録全体を表示PDF形式でダウンロード (4204K) -
笠間 太郎, 秋元 宏, 平野 昌繁1968 年 9 巻 1 号 p. 37-50
発行日: 1968年
公開日: 2010/06/04
ジャーナル フリーThe Rokko Tunnel built up in April 1967 is 2843m in length and combines Kobe with the Sanda basin in lesser distance. During its construction, geological survey with datailed mapping in scale of 1/100 was attempted and the results are summarized as follows:
The wall of the tunnel consists of the quartz diorite, granite and rarely lithoidite. The mutual relation between the quartz diorite and the granite can be observed in the tunnel and its adjacent area. The quartz diorite is cut by the granite and is transformed into hybrid rocks in some cases. The lithoidite occures as dyke which is intruded into the quartz diorite and the granite.
Major faults observed in the tunnel are located at 370 m and 530 m points from the southern entrance and the both have crushed zoned of ca. 10m in thickness with much outflow of water, respectively. A number of minor faults are also recognized along the mapped route.
The fractures in rocks often show the same characteristics as those accompanied by the conjugate set due to that stress distribution under which the strike slip faults are expected. It may also be assumed that they are in connection with the tectogenesis by which the faulting is resulted.
Though the zones of the velocity lower than 3 km/ sec., checked by seismic prospecting prior to the construction, were generally assumed to be corresponding to faults and crushed zones, this is not always the case and they seem rather closely related to the direction and or spacing of fractures in parts.抄録全体を表示PDF形式でダウンロード (1344K) -
日高 稔1968 年 9 巻 1 号 p. 51-61
発行日: 1968年
公開日: 2010/06/04
ジャーナル フリーOn the basis of data obtained from boring and surface survey to Quaternary sediments in the district under consideration, has it become clear that thickness of the alluvium is less than 15m. and early to middle Pleistocene formations lie under the Alluvium.
Besides standard penetration test to these sediments indicates that N value of Alluvial fine to medium sand and silt is not more than 10 at shallower than 5m. underground, while that of Diluvial sand is more than 25 at deeper than 15m. But as for gravel, their N value is not always in proportion to depth where they 1ie.
The Alluvium is composed mostly of shallow sea sediments, on the other hand, the Diluvium contains very often tuffs, and lacustrine materials in the lower part and bay ones in the upper.抄録全体を表示PDF形式でダウンロード (963K)
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