start-ver=1.4 cd-journal=joma no-vol=61 cd-vols= no-issue=2 article-no= start-page=271 end-page=282 dt-received= dt-revised= dt-accepted= dt-pub-year=2021 dt-pub=202104 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Reliability-based design for earth-fill dams against severe natural disaster events en-subtitle= kn-subtitle= en-abstract= kn-abstract=The maintenance of geotechnical structures, such as earth-fill dams, is required as a countermeasure against severe natural disasters, particularly earthquakes and heavy rains. The reliability-based analysis introduced here is in response to the recent demand for low-cost improvements.First, a statistical model of N values was determined from Swedish weight sounding (SWS) tests to present the spatial variability of the soil strength. Then, a reliability-based analysis of embankments was conducted by considering the variability of the internal friction angle derived from N value, and the seismic hazard for the Nankai Trough. The next step was to evaluate the probability of the overflow of earth-fills during heavy rains. The rainfall intensity was considered as a probabilistic parameter, and the various rainfall patterns were tested by the proposed method. Finally, the total risk due to both earthquakes and heavy rains was evaluated for an earth-fill site. As a result, the possibility for the practical use of the proposed method in making plans for the maintenance of deteriorated earth-fill dams was verified. en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ShibataToshifumi en-aut-sei=Shibata en-aut-mei=Toshifumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ShukuTakayuki en-aut-sei=Shuku en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= en-keyword=risk evaluation kn-keyword=risk evaluation en-keyword=earth-fill dam kn-keyword=earth-fill dam en-keyword=damage probability kn-keyword=damage probability en-keyword=dam breaching kn-keyword=dam breaching en-keyword=spatial variability kn-keyword=spatial variability en-keyword=spatial variability kn-keyword=spatial variability en-keyword=natural disaster kn-keyword=natural disaster en-keyword=hazard curve kn-keyword=hazard curve en-keyword=fragility curve kn-keyword=fragility curve en-keyword=sounding test kn-keyword=sounding test END start-ver=1.4 cd-journal=joma no-vol=25 cd-vols= no-issue=1 article-no= start-page=1 end-page=4 dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=202003 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Efficient modelling of 3-d finite element mesh formation with use of 3-d topographic survey kn-title=3次元計測を利用した効率的な3次元有限要素モデル化法の提案 en-subtitle= kn-subtitle= en-abstract= kn-abstract= In this decade, 3-dimensional topographic survey has been developed by using the UAV as like drones. With the technique, the complete topographies of the geo-structures can be measured. Although the accurate shapes of the geo-structures can be obtained, the numerical methods as like the finite element method is are not related to the 3-dimensional survey directly. In this research, the finite mesh modelling technique with use of the 3-D topographic survey is developed. The models of the earth-fill embankments formed from measured 3-D data are introduced as the examples. en-copyright= kn-copyright= en-aut-name=KANESHIGEMinoru en-aut-sei=KANESHIGE en-aut-mei=Minoru kn-aut-name=金重稔 kn-aut-sei=金重 kn-aut-mei=稔 aut-affil-num=1 ORCID= en-aut-name=NISHIMURAShin-ichi en-aut-sei=NISHIMURA en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=2 ORCID= en-aut-name=SHIBATAToshifumi en-aut-sei=SHIBATA en-aut-mei=Toshifumi kn-aut-name=柴田俊文 kn-aut-sei=柴田 kn-aut-mei=俊文 aut-affil-num=3 ORCID= en-aut-name=SHUKUTakayuki en-aut-sei=SHUKU en-aut-mei=Takayuki kn-aut-name=珠玖隆行 kn-aut-sei=珠玖 kn-aut-mei=隆行 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学大学院環境生命科学研究科 affil-num=2 en-affil= kn-affil=岡山大学大学院環境生命科学研究科 affil-num=3 en-affil= kn-affil=岡山大学大学院環境生命科学研究科 affil-num=4 en-affil= kn-affil=岡山大学大学院環境生命科学研究科 en-keyword=3-dimensional survey kn-keyword=3-dimensional survey en-keyword=UAV kn-keyword=UAV en-keyword=finite element mesh modelling kn-keyword=finite element mesh modelling END start-ver=1.4 cd-journal=joma no-vol=38 cd-vols= no-issue= article-no= start-page=1 end-page=1 dt-received= dt-revised= dt-accepted= dt-pub-year=2016 dt-pub=201611 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=地球環境問題と環境マネジメント en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=76 end-page=92 dt-received= dt-revised= dt-accepted= dt-pub-year=2014 dt-pub=201406 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Simplified approach to evaluate total external loading to Kojima Lake en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=NISHIMURAShin-ichi en-aut-sei=NISHIMURA en-aut-mei=Shin-ichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OKUBOKenji en-aut-sei=OKUBO en-aut-mei=Kenji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MORITAHidenori en-aut-sei=MORITA en-aut-mei=Hidenori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KOSKIAHOJari en-aut-sei=KOSKIAHO en-aut-mei=Jari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TATTARISirrka en-aut-sei=TATTARI en-aut-mei=Sirrka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil= affil-num=2 en-affil= kn-affil= affil-num=3 en-affil= kn-affil= affil-num=4 en-affil= kn-affil= affil-num=5 en-affil= kn-affil= END start-ver=1.4 cd-journal=joma no-vol=26 cd-vols= no-issue= article-no= start-page=62 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=200411 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=編集後記 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=27 cd-vols= no-issue= article-no= start-page=55 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=200512 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=編集後記 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=193 end-page=198 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199603 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Settlement Prediction Method Using Observed Settlement Velocity en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a new method for prediction of consolidation settlements of soft grounds. The method is based on the theoretical result which shows that the settlement velocity of soft grounds non-improved or improved with sand drains decreases exponentially with time. Final settlements can be easily derived from the regression analysis for the relationship between the elapsed time and the observed settlement velocity. The method has advantages of its simplicity and capability to give the satisfactorily good estimate of the consolidation settlements, and also the support of the theoretical background. en-copyright= kn-copyright= en-aut-name=ShimadaKiyoshi en-aut-sei=Shimada en-aut-mei=Kiyoshi kn-aut-name=島田清 kn-aut-sei=島田 kn-aut-mei=清 aut-affil-num=1 ORCID= en-aut-name=NishimuraSin-ichi en-aut-sei=Nishimura en-aut-mei=Sin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=2 ORCID= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=consolidation kn-keyword=consolidation en-keyword=settlement prediction kn-keyword=settlement prediction en-keyword=soft ground kn-keyword=soft ground en-keyword=sand drains kn-keyword=sand drains en-keyword=one-dimensional consolidation kn-keyword=one-dimensional consolidation END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=181 end-page=192 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199603 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Prediction of Pore Water Pressures in Several Embankment Dams by Normal and Back Analyses en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes the prediction of seepage in the impervious zones of six embankment dams by seepage analysis. In addition, by making use of the available monitored pore water pressure data of the first filling of reservoir, back analysis was carried out to estimate the best fit seepage parameters. The estimated parameters were used for further prediction of pore water pressures in subsequent monitored durations with reasonable accuracy. The accuracy of prediction was evaluated quantitatively by the prediction difference and error index. The results show that the error indices in the upstream sides of the impervious zones are smaller than those in the downstream sides. en-copyright= kn-copyright= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=1 ORCID= en-aut-name=NaritaMutsuya en-aut-sei=Narita en-aut-mei=Mutsuya kn-aut-name=成田睦也 kn-aut-sei=成田 kn-aut-mei=睦也 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ChengChin Thai kn-aut-sei=Cheng kn-aut-mei=Chin Thai aut-affil-num=3 ORCID= en-aut-name=ShimadaKiyoshi en-aut-sei=Shimada en-aut-mei=Kiyoshi kn-aut-name=島田清 kn-aut-sei=島田 kn-aut-mei=清 aut-affil-num=4 ORCID= en-aut-name=NishimuraShinichi en-aut-sei=Nishimura en-aut-mei=Shinichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=5 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OforiEmanual kn-aut-sei=Ofori kn-aut-mei=Emanual aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 affil-num=6 en-affil= kn-affil=岡山大学 en-keyword=Unsaturated soils kn-keyword=Unsaturated soils en-keyword=fill dams kn-keyword=fill dams en-keyword=pore water pressure kn-keyword=pore water pressure en-keyword=back analysis kn-keyword=back analysis en-keyword=FEM kn-keyword=FEM END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=107 end-page=120 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Determination of Crossarm Installation in Fill Dams by Back Analysis en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper discusses a numerical model that can be used to optimize the installation in a zoned type and a homogeneous type fill dam. Before installation in a real dam to evaluate dam behavior, numerical model described in this paper is carried out on a prototype dam to check the optimum installation, using cross arm measurements. Three cross arm installations at the upstream, the core and downstream to measure displacements are considered. The installation options considered are three cross arm combinations for best installation to verify the safety of dams and to reduce cost. Finite element method is used for generating the displecement field in a linear elastic numerical model. The generated data is used as an input data in the back analysis to check the adequacy of each installation option. en-copyright= kn-copyright= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OforiEmmanuel kn-aut-sei=Ofori kn-aut-mei=Emmanuel aut-affil-num=2 ORCID= en-aut-name=ShimadaKiyoshi en-aut-sei=Shimada en-aut-mei=Kiyoshi kn-aut-name=島田清 kn-aut-sei=島田 kn-aut-mei=清 aut-affil-num=3 ORCID= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=145 end-page=151 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=20000229 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Evaluation of Liquefaction Resistance by In-situ Testing and Its Application to Reliability Design kn-title=現場試験による液状化強度の評価と信頼性設計への適用 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A calculation method of probability of liquefaction is proposed in this paper. The spatial variability of soil parameters for the dynamic shear strength, i.e., N-values, median grain size, fines contents, and the statistical characteristics of the earthquake frequency are considered in the analysis. The standard penetration test (SPT) is convenient to estimate the spatial variability of the dynamic shear strength and mainly used in this study. Furthermore the determination of dynamic shear strength based on Swedish weight Sounding test also introduced here, because it is the simpler test than SPT. While the statistical model of the earthquake frequency is determined based on the record of historical earthquakes. Using this method the probability of liquefaction is calculated. The sand compaction pile method is considered for the ground improvement against the liquefaction. Finally, the relationship between the sand replacement rate and the probability of liquefaction is clarified. en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=1 ORCID= en-aut-name=ShimizuHideyoshi en-aut-sei=Shimizu en-aut-mei=Hideyoshi kn-aut-name=清水英良 kn-aut-sei=清水 kn-aut-mei=英良 aut-affil-num=2 ORCID= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=3 ORCID= en-aut-name=ShimadaKiyoshi en-aut-sei=Shimada en-aut-mei=Kiyoshi kn-aut-name=島田清 kn-aut-sei=島田 kn-aut-mei=清 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岐阜大学農学部 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=東京農工大学農学部 en-keyword=probability of liquefaction kn-keyword=probability of liquefaction en-keyword=reliability design kn-keyword=reliability design en-keyword=spatial variability of soil parameters kn-keyword=spatial variability of soil parameters en-keyword=statistical model of earthquake frequency kn-keyword=statistical model of earthquake frequency en-keyword=dynamic shear strength kn-keyword=dynamic shear strength END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=85 end-page=97 dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=20010228 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=One-dimensional Compression Tests of Sludge Cake from Dredged Sludge kn-title=浚渫ヘドロ脱水ケーキの一次元圧縮試験 en-subtitle= kn-subtitle= en-abstract= kn-abstract=One-dimensional compression tests were performed to investigate compression characteristics of sludge cake used as a construction material. The sludge cake is dewatering product of dredged sludge from the bottom of a lake. The test results show following compression characteristics. (1) For the undisturbed samples, e-log p curves show compressibility of overconsolidated clay ordinatily observed. (2) For the disturbed samples, there observed compressibility close to that of ordinary normally consolidated clay. (3) For the recompressed samples, there observed two turning points on e-log p curve. The compression presures(p(c1) and p(c2)) at those points for the unsubmerged tests have a linear correlation with the recompression pressure(p(s)). The submerged tests give very small values of p(c1) and p(c2) compared with the case of unsubmerged test. (4) For the recompressed samples, the first compression index(C(c1)) after p(c) has a linear correlation with the initial void ratio(e(0)), and the second compression index(C(c2)) shows almost constant value. en-copyright= kn-copyright= en-aut-name=WakitaniYoshiaki en-aut-sei=Wakitani en-aut-mei=Yoshiaki kn-aut-name=脇谷芳招 kn-aut-sei=脇谷 kn-aut-mei=芳招 aut-affil-num=1 ORCID= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=2 ORCID= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=3 ORCID= en-aut-name=InoueTakashi en-aut-sei=Inoue en-aut-mei=Takashi kn-aut-name=井上隆司 kn-aut-sei=井上 kn-aut-mei=隆司 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=sludge cake kn-keyword=sludge cake en-keyword=one-dimensional compression test kn-keyword=one-dimensional compression test en-keyword=e〜log p curve kn-keyword=e〜log p curve en-keyword=compression index kn-keyword=compression index en-keyword=void ratio kn-keyword=void ratio END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=55 end-page=74 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020322 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Damage factors analysis for small embankment dams due to the Hyogoken-Nambu earthquake special to Hokudan Town kn-title=兵庫県南部地震による北淡町を中心にしたため池の被害の要因分析 en-subtitle= kn-subtitle= en-abstract= kn-abstract=This study was performed to clarify which factors affected damage to take-ike (small embankment dams for irrigation in Japanese) of Hokudan Town on Awaji Island in western Japan due to Hyogoken-Nambu earthquake. Multivariate and ordinary statistical analysis were carried out using documentary data (181 damaged and 328 undamaged dams), and ordinary one was done for the results investigated in situ. The model for the multivariate analysis was created with 13 items and 94 categories for 4 groups (Location, Geology Structure, and History of Dam). As a result, the factors causing to damage for dam are (1) the nearest fault (Nojima, Mizukoshi and D2), (2) embankment volume (the larger the more), (3) angle of crest axis to epicenter (diagonal and normal), (4) distance to the nearest fault (less than 500 m), (5) distance to the epicenter (8 to 14 km which almost agree to the location of seismic intensity 7 JMA), (6) play view of dam axis (3 or 4 axes), (7) angle of crest axis to nearest fault (diagonal and normal), (8) elevation of dam site (over 100 m), (9) surface geology of dam site (non-cohesive soil), (10) era of construction (prior to 1891), and (11) soil properties of embankment (constructed of sand, smaller penetration resistance). en-copyright= kn-copyright= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=1 ORCID= en-aut-name=KunimasaKana en-aut-sei=Kunimasa en-aut-mei=Kana kn-aut-name=国政華奈 kn-aut-sei=国政 kn-aut-mei=華奈 aut-affil-num=2 ORCID= en-aut-name=NanbaAkiyo en-aut-sei=Nanba en-aut-mei=Akiyo kn-aut-name=難波明代 kn-aut-sei=難波 kn-aut-mei=明代 aut-affil-num=3 ORCID= en-aut-name=YokomizoTakayuki en-aut-sei=Yokomizo en-aut-mei=Takayuki kn-aut-name=横溝隆之 kn-aut-sei=横溝 kn-aut-mei=隆之 aut-affil-num=4 ORCID= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=5 ORCID= en-aut-name=ShimadaKiyoshi en-aut-sei=Shimada en-aut-mei=Kiyoshi kn-aut-name=島田清 kn-aut-sei=島田 kn-aut-mei=清 aut-affil-num=6 ORCID= en-aut-name=HoriToshio en-aut-sei=Hori en-aut-mei=Toshio kn-aut-name=堀俊男 kn-aut-sei=堀 kn-aut-mei=俊男 aut-affil-num=7 ORCID= en-aut-name=NishiyamaTatsuro en-aut-sei=Nishiyama en-aut-mei=Tatsuro kn-aut-name=西山竜朗 kn-aut-sei=西山 kn-aut-mei=竜朗 aut-affil-num=8 ORCID= en-aut-name=WakitaniYoshiaki en-aut-sei=Wakitani en-aut-mei=Yoshiaki kn-aut-name=脇谷芳招 kn-aut-sei=脇谷 kn-aut-mei=芳招 aut-affil-num=9 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 affil-num=6 en-affil= kn-affil=元岡山大学環境理工学部環境管理工学科(現東京農工大学) affil-num=7 en-affil= kn-affil=(株)ウエスコ affil-num=8 en-affil= kn-affil=岡山大学 affil-num=9 en-affil= kn-affil=岡山大学 en-keyword=Earth dam kn-keyword=Earth dam en-keyword=earthquake damage kn-keyword=earthquake damage en-keyword=site investigation kn-keyword=site investigation en-keyword=statistical analysis kn-keyword=statistical analysis en-keyword=case study kn-keyword=case study END start-ver=1.4 cd-journal=joma no-vol=11 cd-vols= no-issue=1 article-no= start-page=83 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20060315 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Characteristics of Dredged Sludges by Desiccation kn-title=乾燥による底泥の性質変化 en-subtitle= kn-subtitle= en-abstract= kn-abstract=To examine the possible reuse of dredged sludge in view of construction material, physico-chemical properties and geotechnical characteristics of desiccated sludge are investigated through laboratory experiments. The consistency test, the pH test, the XRF test and the X-ray diffraction analysis are carried out for physico-chemical proteries, and the conolidation test and the permeability test are made for geotechnical characteristics. It is concluded that the history of desiccation changes the consistency of sludge and affects its permeability and consolidation bahavior. en-copyright= kn-copyright= en-aut-name=TakisawaTomoaki en-aut-sei=Takisawa en-aut-mei=Tomoaki kn-aut-name=滝澤倫顕 kn-aut-sei=滝澤 kn-aut-mei=倫顕 aut-affil-num=1 ORCID= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=2 ORCID= en-aut-name=MurakamiAkira en-aut-sei=Murakami en-aut-mei=Akira kn-aut-name=村上章 kn-aut-sei=村上 kn-aut-mei=章 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=Dredged sludges kn-keyword=Dredged sludges en-keyword=consolidation kn-keyword=consolidation en-keyword=permeability kn-keyword=permeability en-keyword=solidification material kn-keyword=solidification material en-keyword=XRF kn-keyword=XRF END start-ver=1.4 cd-journal=joma no-vol=83 cd-vols= no-issue=1 article-no= start-page=43 end-page=51 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=1994 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Some Considerations on the Accuracy of the Stochastic Finite Element Method kn-title=確率有限要素法の精度に関する2,3の考察 en-subtitle= kn-subtitle= en-abstract= kn-abstract=(1)確率有限要素法の二手法である線形近似法とモンテカルロ法についての定式化を示した.特に,モンテカルロシミュレーションについては,一変数一次元確率場と一変数二次元確率場の乱数発生法について示した. (2)ヤング率の自己相関関数を表現するのに必要な要素分割数について考察を行った.その結果,本解析モデルに関しては,10〜15分割で変位の平均値,標準偏差が収束することが分かった (3)線形近似法とモンテカルロ法の結果の比較を行った.それによると,線形近似法の結果は,ヤング率の変動係数が0.2の場合まではモンテカルロ法の結果とよく一致するという結論が得られた.ただし,変位の平均値における二手法間での相違は,ヤング率の変動係数が大きい場合でも,本研究の例題に関しては実務上無視しても差し支えないほどの大きさであることが分かった. 本研究の数値計算には,岡山大学情報処理センターのACOS2010,SX-1Eを使用した。 en-copyright= kn-copyright= en-aut-name=NishimuraShin-ichi en-aut-sei=Nishimura en-aut-mei=Shin-ichi kn-aut-name=西村伸一 kn-aut-sei=西村 kn-aut-mei=伸一 aut-affil-num=1 ORCID= en-aut-name=FujiiHiroaki en-aut-sei=Fujii en-aut-mei=Hiroaki kn-aut-name=藤井弘章 kn-aut-sei=藤井 kn-aut-mei=弘章 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 en-keyword=確率有限要素法 kn-keyword=確率有限要素法 en-keyword=線形近似法 kn-keyword=線形近似法 en-keyword=モンテカルロ法 kn-keyword=モンテカルロ法 END