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Title :耕盤のある圃場における支持力のすべり線解析(第3報) : 履帯に対する支持力
Title alternative :A Slip-Line Analysis for the Bearing Capacity of Farm Land on a Sole Pan (Part 3) : Bearing Capacity of Track-
Authors :鹿内, 健志
久木田, 徹
橋口, 公一
上野, 正実
Authors alternative :Shikanai, Takeshi
Kukita, Toru
Hashiguchi, Koichi
Ueno, Masami
Issue Date :1-Jan-1999
Abstract :一般に圃場は硬い耕盤の上に軟弱な作土が存在する2層構造を呈し,均質半無限地盤とは異なる支持力特性を示すと考えられる。本研究では,履帯の合理的な設計指針を得るため,耕盤を有する圃場の履帯に対する支持力を,無限個の近接する荷重が剛盤(耕盤)上の摩擦性剛塑性体(作土)に作用する平面ひずみ問題として理想化し,すべり線法により理論解析を行なった。荷重間隔が小さい場合,すべり線場の干渉を生じ,また,作土厚が小さい場合すべり線域が制限されるが,荷重幅,荷重間隔および作土厚に応じて4種のすべり線場に分類できることを明らかにし,可容な速度場が成立する正解すべり線場を提案した。また,それぞれのすべり線場に基づいて支持力を算定し,荷重幅,荷重間隔および内部摩擦角に応じた支持力の推移状況を明らかにした。
Bearing capacity of farm land which generally consists of soft soil on hard sole pan differs from that of homogeneous semi-infinite ground. In this study a track is idealized as infinite adjacent loads penetrating into rigid-perfectly plastic solid with internal friction (soil) on rigid sole pan in plane strain. The bearing capacity of farm land for the track is theoretically analyzed by the slip-line method in order to establish a reasonable designing guidelines for the track. Interfering slip-line field is appeared with small load interval. The slip-line field is restricted within shallow limits when the soil depth is small. Four types of the slip-line field that satisfy the admissible velocity field are proposed for variation of soil depth, load width and its interval. Then, the variation of the bearing capacity is discussed in relation to internal friction angle of soil, load width and its interval.
Type Local :雑誌掲載論文
ISSN :0285-2543
Publisher :農業食料工学会
URI :http://hdl.handle.net/20.500.12000/37089
Citation :農業機械学会誌 = Journal of the Japanese Society of Agricultural Machinery Vol.61 no.1 p.75 -80
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Agriculture)

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