A Slip-Line Analysis for the Bearing Capacity of Farm Land on a Sole Pan (Part 3)

Bearing Capacity of Track

Abstract

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.