Search Results 1-20 of 111

  • Unconfined Compression Strength of Grouted Soil Improved with Water Glass Grouting Material Including Kaolin Powder  [in Japanese]

    山口 晶 , 岡田 和成 , 横井 勉 , 金高 鉄次 , 飛田 善雄

    東北学院大学工学部研究報告 = Science and engineering reports of Tohoku Gakuin University, Japan 53(1), 3-9, 2019-02

    IR 

  • COMPRESSION CHARACTERISTIC OF LIGNITE DURING ACCELERATING DECOMPOSITION OF ORGANIC MATTER USING HYDROGEN PEROXIDE  [in Japanese]

    荒牧 憲隆 , ALAM A.K.M. Badrul , 山口 眞司 , 青山 秀夫 , 金子 勝比古

    岩盤力学に関するシンポジウム講演論文集 Proceedings of the Symposium on Rock Mechanics 45, 254-259, 2018-01-15

  • Numerical Study on Impact Testing of Low-Strength Materials Using Flanged Split-Hopkinson Bar Method  [in Japanese]

    TANIGAKI Kenichi , Yamada Hiroyuki

    … <p>In this study, we investigated the effect of flange part on stress wave propagation in the compression test of low strength material using flanged Split Hopkinson Bar method. … Due to the flange with a larger radius than the input/output bar, a pair of reflected waves of compression and tension with apparently different shapes from the one-dimensional reflected wave depending on mechanical impedance mismatch was observed. …

    The Proceedings of The Computational Mechanics Conference 2018.31(0), 331, 2018

    J-STAGE 

  • Estimation of Unconfined Compression Strength of Sand Improved with Super Fine Silica Powder Slurry Materials  [in Japanese]

    YAMAGUCHI Akira , OKADA Kazunari , TOBITA Yoshio

    … <p>The method of estimating the unconfined compression strength of solid ground improved with permeation grouting was discussed in which the adsorption phenomena of powder material among grain particles was considered. … A set of one dimensional permeation tests and unconfined compression tests on the hundreds specimens were conducted. …

    Journal of the Society of Materials Science, Japan 67(1), 53-58, 2018

    J-STAGE 

  • Heat Flux Sensor on Metal Substrate for Engine  [in Japanese]

    NAGASAKA Keisuke , TSUCHIYA Tomohiro , NAKAMURA Yuto , DEJIMA Kazuhito , NAKABEPPU Osamu

    One of the reason of lowering the thermal efficiency is a cooling loss through combustion chamber walls. … Up to the present, heat fluxes measurement test was conducted by the sensor flush with the chamber wall at the Rapid Compression and Expansion Machine (RCEM). … The heat flux was calculated by a one-dimensional transient heat conduction analysis in the sensor substrate using the measured temperature data as boundary conditions. …

    The Proceedings of Mechanical Engineering Congress, Japan 2016(0), J0720102, 2016

    J-STAGE 

  • PROPERTY CHANGES OF SOIL AROUND A ROTARY PRESS-IN PILE WITH WINGS AND LATERAL LOADING BEHAVIOR OF THE PILE  [in Japanese]

    KUZE Naoya , SUEMASA Naoaki , INOUE Namihiko , FUTAKI Mikio

    … In the experiments, the execution of pile installation was managed with constantly maintaining the ratio of s/p in the range of 1.0±0.1, where s is the penetration length of pile rotated by one revolution and p is the helical pitch of its pile wing.<br> The experiments were carried out at two different sites, where one was the site depositing an alluvium clay layer and the other with a diluvial loam layer. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 81(727), 1455-1465, 2016

    J-STAGE 

  • SLAKING PHENOMENA AND DEFORMATION BEHAVIOR OF CRUSHED MUDSTONE  [in Japanese]

    KIKUMOTO Mamoru , FUKUDA Takumi , KYOKAWA Hiroyuki

    乾湿繰り返しに伴う風化現象であるスレーキングを,従来型の促進スレーキング試験と一次元圧縮条件下で湿乾履歴を与える圧縮スレーキング試験により検討した.促進スレーキング試験では,試料によるスレーキング特性の違いや,細粒化に伴う土の力学特性の不可逆な変化について考察した.圧縮スレーキング試験では,圧縮過程での粒子破砕が圧縮性の増加に寄与すること,拘束応力下のスレーキングは土の大圧縮を引き起こすことを示し …

    Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 72(2), 126-135, 2016

    J-STAGE 

  • Influence of shear speed on hydro-mechanical behavior for compacted bentonite

    Nishimura Tomoyoshi

    … This study focuses on hydro-mechanical behavior of compacted sodium bentonite, and three different tests such as swelling test, one-dimensional compression test and constant vertical stress direct shear test were performed with suction control using vapor pressure technique. … Also, a modified direct shear apparatus installed RH air circulation system was used in the direct shear test. …

    Japanese Geotechnical Society Special Publication 2(53), 1837-1840, 2016

    J-STAGE 

  • A microscopic investigation into the breakage behavior of calcareous origin grains in 1D compression

    Shi Yi , Yan W. M. , Mukunoki T. , Sato T. , Otani J.

    … In this study, micro-focused X-ray CT scanned images are used to visualize the development of grain crushing under one-dimensional compression. … Initially uniformly graded carbonate grains are prepared into a tailor-made oedometric cell such that X-ray CT scanned images can be taken at different stages (loading and unloading) of the test. … The void space becomes smaller and varies within a narrower range as the compression continues. …

    Japanese Geotechnical Society Special Publication 2(16), 630-634, 2016

    J-STAGE 

  • Experimental study of the effect of stress level on time dependent deformation of sandy clay soil

    Negahdar A. , Yadegari Sh. , Houshmandi S.

    One-dimensional oedometer single stage and stepwise tests are carried out under single drainage condition on dried and water-saturated sandy clay soil at different stress levels, and the test results are explained using the coefficient of secondary compression (Cα) and compression index (Cc). …

    Japanese Geotechnical Society Special Publication 2(11), 457-460, 2016

    J-STAGE 

  • Fractional calculus-based compression modeling of soft clay

    Zhang Cheng-Cheng , Zhu Hong-Hu , Mei Guo-Xiong , Shi Bin , Cheng Gang

    … This study attempted to analyze the one-dimensional (1D) compression behavior of clay by using fractional calculus. … This model was successfully applied to fit the oedometer test results of Nansha clay, which is widely spread in the Pearl River Delta, China. … It is demonstrated that the fractional derivative-based model was able to characterize the compression behavior of soft clay with fewer parameters than classical rheological models. …

    Japanese Geotechnical Society Special Publication 2(10), 417-420, 2016

    J-STAGE 

  • Effects of time and rate on the stress-strain-strength behavior of soils

    Yin Jian-Hua

    … The oedometer tests include (i) multi-staged loading tests with unloading/reloading and enough time for creep and swelling in 1D straining and (ii) step-changed constant rate of strain compression tests with unloading/reloading in 1D straining as well. … The triaxial tests include <i>K<sub>o</sub></i>-consolidated undrained compression or extension tests with constant (or stepped changed) strain rates. …

    Japanese Geotechnical Society Special Publication 2(10), 440-445, 2016

    J-STAGE 

  • One-dimensional Compression Test Using Discrete Element Method with Rotational Stiffness of Contact Surface of Spherical Elements Based on Contact Theory  [in Japanese]

    SETOUCHI Hideki

    本研究は, 球要素間接触面におけるHertzの応力・変位分布から誘導された接触理論に基づく球要素間接触面回転剛性を個別要素法に適用して, 粒状体の一次元圧縮剛性に与える球要素間, つまり粒子間接触面回転剛性の効果を明らかにしたものである.粒子間接触面回転剛性は, 粒状体の力学剛性を支配する粒子骨格構造の強度を高め, ひいては圧縮剛性を高める効果があることが明らかとなった.また, 粒子間接触面回転剛 …

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 83(4), I_133-I_146, 2015

    J-STAGE 

  • Discrete Element Simulations Using Irregularly-Shaped Sand Grains for Soil Mechanical Tests under High Confining Stress:– Basic Studies of Well Stability for Methane Hydrate Development (Part. 3) –  [in Japanese]

    KATAGIRI Jun , YONEDA Jun , MIYAZAKI Kuniyuki , KAKUMOTO Masayo , TENMA Norio , AOKI Kazuo

    … A series of one-dimensional compression simulations using specimens with various spring constants was performed to optimize the spring constant. … As a result, a compression curve of specimen with 10<sup>5</sup> … N/m spring constant was in good agreement with that obtained in past experiment within about 20MPa normal compression stress where the effect of grain crushing is thought to be still small. …

    Journal of MMIJ 130(5), 138-145, 2014

    J-STAGE 

  • Mechanical properties of charcoal from sewage sludge as geo-material  [in Japanese]

    SHINJO Toshiya , REN Lisha , KOMIYA Yasuaki , UENO Masami , KAWAMITSU Yoshinobu

    下水汚泥は安定して供給されるバイオマス資源である。試作した下水汚泥炭について一次元圧縮試験及び三軸圧縮試験を行い,地盤工学的見地から力学特性を調べた。下水汚泥炭は粒子内に間隙を形成し,乾燥密度も小さく,軽量土として利用できる。下水汚泥炭の圧縮曲線から決定した降伏応力は200~300kN/m<sup>2</sup>であり,その応力以下では粒子破砕はわずかである。また,有効応力 …

    Japanese Geotechnical Journal 8(3), 379-390, 2013

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  • Interpretation of Mechanical Behaviors of Crushed Mudstone Assembly with Slaking Based on Soil Skeleton Structure  [in Japanese]

    NAKANO Masaki , NAKAI Kentaro , SAKAI Takayuki

    … In order to understand the mechanical behavior of Tertiary mudstones used as embankment material, one-dimensional compression tests were carried out for two types of mudstone assembly, having different resistance to slaking. … The test results were also simulated by FEM based on SYS Cam-clay model. …

    地盤工学会誌 = / the Japanese Geotechnical Society 60(7), 6-9, 2012-07-01

    NDL Digital Collections  References (10)

  • Damage Evaluation in Freezing and Thawing Test of Concrete by Elastic-Wave Methods  [in Japanese]

    … In the freezing and thawing test of concrete, the frost damage is nondestructively evaluated by elastic-wave methods. … One is based on the ultrasonic test, which measures the transmission time of the longitudinal wave (P wave) and the other is associated with the resonant frequencies of vibrations. … Concerning the resonant frequencies of concrete samples, a three-dimensional analysis is performed by the boundary element method to identify actual vibrating-modes. …

    Materials and Structures 44(10), 1725-1734, 2011-12

    IR 

  • COMPRESSION INDEX IN BEHAVIORS OF ONE-DIMENSIONAL CONSOLIDATION ANALYSIS TAKING ACCOUNT OF SECONDARY COMPRESSION

    IMAMURA Hiroko , SUGIYAMA Motohiro , TONOSAKI Akira , AKAISHI Masaru

    一次元圧密解析に利用する圧縮指数λは,通常,1日間隔で段階載荷する圧密試験の<i>e</i>-log <i>p</i>曲線から求められるので,圧縮指数λには二次圧密の影響が含まれると考えられる.このノートでは,二次圧密が圧縮指数に与える影響を調べるために,有効応力増分にのみ依存する一次圧密量で定義した圧縮指数&lambda …

    Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 67(2), 210-215, 2011

    J-STAGE 

  • COMPRESSIVE BEHAVIOR DURING THE TRANSITION OF STRAIN RATES

    TSUTSUMI AYATO , TANAKA HIROYUKI

    … In the isotache model, compression curves are not only determined by pressure, but also by strain rate. … However, considerable scatter has been observed in the test results, which show the effects of the strain rate, and questions arise as to whether such scatter is caused by the heterogeneity of the soil samples or by the incompletion of the model. …

    SOILS AND FOUNDATIONS 51(5), 813-822, 2011

    J-STAGE 

  • INFLUENCE OF CURING STRESS ON ONE-DIMENSIONAL YIELDING OF CEMENT-ADMIXED BANGKOK CLAY AT HIGH WATER CONTENT

    JONGPRADIST PORNKASEM , YOUWAI SOMPOTE , MANORAT PICHET , KONGKITKUL WARAT , CHUCHEEPSAKUL SOMCHAI

    … The influence of curing stress on the one-dimensional compression characteristics of cement-admixed clay at high water content is investigated by oedometer tests, with special attention paid to the primary vertical yield stress. …

    SOILS AND FOUNDATIONS 51(2), 351-357, 2011

    J-STAGE 

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