トンネル工学論文集
Online ISSN : 1884-9105
Print ISSN : 1349-5399
ISSN-L : 1349-5399
変換解析システムによるノンコア削孔トンネル切羽前方予測技術
桑原 徹畑 浩二稲川 雄宣平川 泰之
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ジャーナル フリー

2008 年 18 巻 p. 1-10

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The authors propose the new drilling parameter named “Normalized Drilling Velocity Ratio” for evaluation of geological characteristics ahead of the tunnel face, using conversion analysis of non-core drilling parameters. This newparameter, enable to neglect the change of feed pressure which gives large effect to the rock evaluation, is suitable for rock mass classification and also for detecting of fault zone. We showed the relation between the new drilling parameter and tunnel rock mass classification using tunnel excavation data, and also discussed relations among the parameter, geology, groundwater, deformation, and construction methods.

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