Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Lowland Technology International
Shigenori Hayashi
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Engineering Transportation

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
FIELD DISPOSITION OF THE MARGINAL STRIP OF THE RIVER DIKE UTILISING WOODEN RAFT AND PILE FOUNDATION ON SOFT CLAY Suman Manandhar; Daisuke Suetsugu; Hiroyuki Hara; Shigenori Hayashi
Lowland Technology International Vol 16 No 2, Dec (2014)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Full scale field experimentations were incorporated along the downstream of the Chikugo River, Saga, Japan in order to observe the effect of wooden raft and pile foundation on the soft clay. In this study, the wooden raft and pile foundation was utilised for the marginal strip to understand the disposition of vertical settlements and lateral displacements of the ground. Cypress wood was taken into consideration in order for constructing raft and pile. Two different types of wooden raft and pile foundations with same dimensions were installed in the ground. The wooden raft installed with single-sided assemblages of wooden piles was configured as Case I. While, the same raft with both-sided assemblages of wooden piles was configured as Case II. A new embankment was constructed embedded with the existed ones on the river dike. The study was carried out for 136 days span of time from the beginning of the embankment construction. The results showed that both side assemblages of wooden piles were more effective to prevent the lateral displacement, reduce the vertical settlement and local deformation of the dike and the surrounding ground with compared to the single-sided installed piles of the similar foundation structure. The test results confirmed that the river dike supported by the wooden raft and pile foundation can be anticipated as more stable on sand layer of the soft ground within the depth of pile length.
CONTAMINANT ADSORPTION CHARACTERISTICS OF KYUSHU REGIONAL SOILS Yan Jun Du; Shigenori Hayashi; Takenori Hino; Kenta Tanaka
Lowland Technology International Vol 2 No 2, Dec (2000)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Four types of Kyushu regional soils, Ariake clay, Haido, Akaboku, and Diatom earth were selected to evaluate their capacities of contaminant adsorption. The contaminants presented in this study are there types of single-salt solutions, KCL, NaCL, and CaCL2 respectively. A batch-type test was performed for each soil and Freundlich model was adopted to plot adsorption isotherms. It was found that among the tested soils. Ariake clay has the highest adsorption capacity in the case of K+ and Ca2+ ions, whereas Diatom earth fails to adsorb any cation. Based on the adsorption isotherms, the cation selectivity of each soil was given. It is concluded that the contaminant adsorption capacity of clay soil is significantly affected by the soil cation exchange capacity (CEC). For a given soil, it seems that the mobility of the cation of the interested species when it transports through soil is mainly controlled by the cation replaceability, its initially adsorbed concentration and nature of the soil, provided that the other conditions remain constant.
ANALYSIS OF SOFT GROUND REINFORCED BY NON-HOMOGENEOUS GRANULAR PILE-MAT SYSTEM Jagdish T. Shahu; Shigenori Hayashi; Madhira R. Madhav
Lowland Technology International Vol 2 No 2, Dec (2000)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Due to differences in compaction characteristics and overburden stresses, modulus of the deformation of granular piles shows variation with depth and granular piles may be considered as non-homogeneous. A simple theoretical approach to analyze soft ground reinforced by non-homogeneous granular piles with granular mat on top is represented. The proposed model is validated by comparison with other numerical models and field test results. A non-homogeneous grnular pile is found to be more beneficial than the homogeneous one. For the case of non-homogeneous granular piles, due to increase in granular pile modulus with depth, shear stresses between the granular pile and the surrounding soft soil and the total settlement reduce by a significant amount. The variation of stress concentration factor with depth tends to become more uniform as the rate of variation of granular pile stiffness with depth increases. The reduction in shear stresses due to non-homogeneity of granular pile is found to be very high at low values or area ratio. This is highly desirable for stabilization of soft soils having low shear strength.
Co-Authors Daisuke Suetsugu Hiroyuki Hara Jagdish T. Shahu Kenta Tanaka Madhira R. Madhav Suman Manandhar Takenori Hino Yan Jun Du