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Dive into the research topics where Kazuhiro Koizumi is active.

Publication


Featured researches published by Kazuhiro Koizumi.


Doboku Gakkai Ronbunshu | 1999

QUALITY EVALUATION OF DEEP CONGLOMERATE CORE SAMPLES BASED ON LABORATORY TESTS

Satoru Kawasaki; Kameichiro Nakagawa; Yoshitake Eto; Akito Nozaki; Kazuhiro Koizumi

地下構造物を大深度礫岩に建設する際には, 礫の影響によりコアの強度および剛性が原位置岩盤よりも過大に評価されたり, 逆に, サンプリングによる乱れの影響によって, 原位置岩盤よりも過小に評価されることが想定される. そこで, 深度600mのボーリングコアを用いた大深度礫岩の室内試験を実施し, 礫岩コアの品質評価を行った. その結果, 礫岩コアの品質に影響を与えるサンプリングによる乱れには, 礫分含有率と方解石含有率の2つが複雑に関与しており, 特に, 方解石含有率が小さく礫分含有率が小さいほど, 礫岩コアがサンプリングによる乱れの影響を受けやすいことがわかった.


Journal of the Japan Society of Engineering Geology | 2002

An Attempt to Estimate Mechanical Properties of Rocks Using the Equotip Hardness Tester

Satoru Kawasaki; Chikaosa Tanimoto; Kazuhiro Koizumi; Masaki Ishikawa


Archive | 2011

Diagnostic method for concrete pipe

Nobutaka Sugita; 信隆 杉田; Kazuhiro Koizumi; 和広 小泉; Toshiaki Nakamura; 敏明 中村


Journal of the Japan Society of Engineering Geology | 1998

An Attempt to Estimate Coefficient of Permeability by Taking Notice of Consolidation Phenomenon on Sedimentary Rock

Satoru Kawasaki; Kameichiro Nakagawa; Kazuhiro Koizumi


Journal of the Japan Society of Engineering Geology | 1993

Consolidation Characteristics on Kazusa Group

Takayasu Hosono; Kazuhiro Koizumi; Nobutaka Sugita; Shohji Ogawa


Journal of the Japan Society of Engineering Geology | 1998

Measurement Method for Gravel Fraction Content of Conglomerate by Image Data Processing

Satoru Kawasaki; Kazuhiro Koizumi


Journal of the Japan Society of Engineering Geology | 1993

Strength and Deformation Characteristics of the Neogene Siltstone, exampled from Middle Formation of Kazusa Group

Takayasu Hosono; Masayuki Nakajima; Kazuhiro Koizumi; Nobutaka Sugita; Shohji Ogawa


PROCEEDINGS OF TUNNEL ENGINEERING, JSCE | 2003

Measurement of the state of tunnel lining and floor by Full-Rotating Laser Scanning Method

Takahiro Sugiura; Osamu Nakano; Kunihiko Sugiyama; Kazuhiro Koizumi; Nobutaka Sugita


Journal of the Japan Society of Engineering Geology | 1998

Evaluation on Scale Effect of Conglomerate Core Sample and Disturbance by Core Sampling

Satoru Kawasaki; Hiroshi Ito; Kazuhiro Koizumi


Journal of the Japan Society of Engineering Geology | 1997

Consideration of Deep Sedimentary Conglomerate Properties by Taking Notice of the Calcite Content

Satoru Kawasaki; Kameichiro Nakagawa; Yoshitake Eto; Akito Nozaki; Kazuhiro Koizumi

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Satoru Kawasaki

Central Research Institute of Electric Power Industry

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Kameichiro Nakagawa

Central Research Institute of Electric Power Industry

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Shohji Ogawa

Nagaoka University of Technology

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Hiroshi Ito

Central Research Institute of Electric Power Industry

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