研究者詳細 - 西村　伸一

論文 - 西村　伸一

分割表示 163 件中 21 - 40 件目／全件表示 >>

確率的感度解析による最適追加調査位置の決定法査読

今出和成, 西村伸一

地盤と建設 39 ( 1 ) 2020年

Evaluation of liquefaction probability of earth-fill dam over next 50 years using geostatistical method based on CPT 査読

Kazunari Imaide, Shin-ichi Nishimura, Toshifumi Shibata, Takayuki Shuku, Akira Murakami, Kazunori Fujisawa

Soils and Foundations 59 ( 6 ) 1758 - 1771 2019年12月

平成30年7月豪雨における岡山の土構造物及び斜面の災害招待

西村伸一, 柴田俊文, 珠玖隆行, 竹下祐二, 小松満, 金秉洙

地盤工学会誌 67 ( 7 ) 18 - 21 2019年7月

地質統計手法に基づくため池堤体強度の空間分布評価査読

今出和成, 西村伸一, 柴田俊文, 珠玖隆行

農業農村工学会論文集 87 ( 1 ) II_29 - II_38 2019年6月

Evaluation of strength distribution at cut slope of decomposed granite with the use of sounding method and geophysical exploration method 査読

Tatsuya Ueta, Shin-Ichi Nishimura, Kazunari Imaide, Toshifumi Shibata, Takayuki Shuku

Paddy and Water Environment 17 ( 2 ) 291 - 297 2019年4月

Prediction of long-term settlement and evaluation of pore water pressure using particle filter 査読

Toshifumi Shibata, Takayuki Shuku, Akira Murakami, Shin-ichi Nishimura, Kazunori Fujisawa, Noritaka Hasegawa, Satoshi Nonami

Soils and Foundations 59 ( 1 ) 67 - 83 2019年2月

スパースモデリングとクリッギングを用いた空間分布推定手法の基礎研究査読

吉田郁政, 田崎陽介, 西村伸一, 今出和成

土木学会論文集A2（応用力学） 75 ( 1 ) 1 - 11 2019年

ため池堤体の特性および構造招待

西村伸一

水環境学会誌 42(A) ( 2 ) 70 - 74 2019年

弾粘塑性FEMと観測データに基づいた斜面の変形挙動評価査読

二木重博, 西村伸一, 珠玖隆行, 柴田俊文

農業農村工学会論文集 306 II_9 - II_18 2018年

応答曲面法による豪雨時のため池破堤に関する信頼性設計

西村伸一, 水間啓慈, 珠玖隆行, 柴田俊文

地盤工学会誌 66 ( 4 ) 8 - 11 2018年

粒度の異なる材料が混合されたため池堤体におけるコーン貫入抵抗の空間分布評価査読

今出和成, 西村伸一, 柴田俊文, 珠玖隆行

土木学会論文集C（地圏工学） 74 ( 2 ) 213 - 224 2018年

CPT結果とせん断波速度の合成による地盤強度の空間分布に対する換算誤差の影響査読

植田起也, 西村伸一, 今出和成, 柴田俊文, 珠玖隆行

土木学会論文集 A2(応用力学) 74 ( 2 ) I_95 - I_104 2018年

サウンディングと地球統計学を利用した地盤調査招待

西村伸一

地盤と建設 36 ( 1 ) 9 - 16 2018年

河川堤防の弱点箇所を抽出する空気圧による連通試験手法の開発査読

新村卓也, 藤吉秀彰, 舘川逸朗, 斉藤雅彦, 珠玖隆行, 小松満, 西村伸一, 西垣誠

地盤と建設 36 ( 1 ) 71 - 78 2018年

Geostatistical Analysis for Identifying Weak Soil Layers in Dikes 査読

S. Nishimura, T. Shibata, T. Shuku, K. Imaide

GEO-RISK 2017: GEOTECHNICAL RISK ASSESSMENT AND MANAGEMENT ( 285 ) 529 - 538 2017年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：AMER SOC CIVIL ENGINEERS

The spatial distribution of the strength inside river dikes is generally identified through sounding tests. In this research, the electric Cone Penetration Test (CPT) is employed, and spatially long- and short-interval tests are mixed to efficiently evaluate the piping risk to a dike. The Indicator Simulation (IS) method is used as the geostatistical method to simulate the N value distribution and to predict the weak area inside the dike. The synthesized approach of the CPT and the Surface Wave Method (SWM), which is one of the geophysical methods, is proposed to compensate for the shortcoming of each approach when conducting the IS. Consequently, the correlation structure inside the dike can be identified accurately, the high resolution of the spatial distribution of the N values can be visualized, and the piping risk to the dike can be discussed based on the results of the investigation.

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アントコロニー最適化手法による土木施工の効率化査読

原田文仁, 珠玖隆行, 西村伸一, 柴田俊文

地盤と建設 35 ( 1 ) 213 - 218 2017年

模型実験結果を利用した圧密逆解析手法の検証

柴田俊文, 西村伸一, 珠玖隆行

地盤工学会誌 65 ( 10 ) 22 - 25 2017年

Diagnosis of earth-fill dams by synthesised approach of sounding and surface wave method 査読

Shin-Ichi Nishimura, Toshifumi Shibata, Takayuki Shuku

Georisk 10 ( 4 ) 312 - 319 2016年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Taylor and Francis Ltd.

The spatial distribution of the strength inside the earth-fill is identified by the sounding tests. In this research, the Swedish weight sounding (SWS) is employed, and the spatial high-density test is performed to identify the spatial correlation structure. Furthermore, the synthesised approach of the SWS and surface wave method, which is one of the geophysical method, is proposed to compensate the shortage of each approach. Consequently, the correlation structure of an earth-fill could be identified accurately, and the high resolution of the spatial distribution could be visualised based on the survey results.

DOI： 10.1080/17499518.2016.1197406

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その他リンク： http://www.tandfonline.com/doi/pdf/10.1080/17499518.2016.1197406

Reliability-based design of earth-fill dams to mitigate damage due to severe earthquakes 査読

Shin-Ichi Nishimura, Takayuki Shuku, Toshifumi Shibata

Georisk 10 ( 1 ) 83 - 90 2016年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Taylor and Francis Ltd.

ABSTRACT: This paper deals with a strategy for the maintenance of geotechnical structures such as earth-fill dams. Standard penetration test (SPT) N-values are frequently used to determine the soil parameters. For this purpose, a statistical model for the N-values is firstly determined from sounding test results. In this research, however, Swedish weight sounding (SWS) tests are employed as they are simpler than SPTs. The identification of spatial correlation of the soil parameters is very difficult, since the number of sampling points is very limited to model the spatial variability. SWS is advantageous, compared with other major sounding method to identify the spatial correlation structure inside the geotechnical structures, since it makes spatially short-interval exams possible due to its simplicity and compactness. Based on the statistical model for the N-values, the shear strength parameters are derived through the empirical relationships. Then, a reliability analysis of the embankments is conducted considering the variability of the internal friction angle and the seismic hazard. Consequently, the probability of damage to the earth-fill over the next 50 years is calculated, and the effect of improving the earth-fill is evaluated based on this probability.

DOI： 10.1080/17499518.2015.1124123

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Numerical Simulation of Embankment Failure due to Overflow by Moving Particle Semi-implicit Method 査読

SHUKU Takayuki, FUJISAWA Kazunori, NISHIMURA Shin-ichi, SHIBATA Toshifumi

農業農村工学会論文集 84 ( 301 ) I-31 - 38 2016年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人農業農村工学会

Recently, the evaluation of the failure potential of earth-filled dams has become important because of the increasing occurrence of storm rainfall. Although most instances of earth-filled dam failure are caused by overflow, in-depth knowledge of the mechanism of the erosion and failure process of embankments due to overflow is still lacking. This paper presents a numerical method for simulating an embankment erosion and failure process by the moving particle semi-implicit (MPS) method. To reasonably simulate the erosion and failure process of an embankment due to overflow, a simple erosion model whose parameters can be determined through erosion tests on embankment materials was newly incorporated into the original MPS method. An embankment erosion and failure process observed in a model test was simulated by the proposed MPS method to confirm its practicability. Although the simulation accuracy for the erosion rate is slightly low at the beginning of the erosion, the average simulated values of the erosion rate are almost the same as the experimental values. The proposed MPS method can be a useful tool in embankment design practices to simulate embankment erosion due to overflow and to discuss remedial measures against overflow.

DOI： 10.11408/jsidre.84.I_31

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その他リンク： https://jlc.jst.go.jp/DN/JLC/20020753557?from=CiNii

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