A PARAMETRIC STUDY ON EVALUATION OF STABILITY OF COLUMN TYPE DM IMPROVED GROUND
The deep mixing method, an in-situ soil stabilization technique using cement and/or lime as a binder, is often applied to improve soft ground. The group column type improvement is extensively applied to stabilize foundation of embankment or lightweight structure. An improved ground design method is established in Japan mainly for reinforcing embankment, in which two failure patterns related to external and internal stabilities are assumed. The author conducted a research project on the failure mechanism and stability of the group column type improved ground subjected to embankment loading. The project involves investigating the failure criteria of two stabilities and the failure mode related to the external and internal stability. These studies have revealed that the current design method may overestimate the stability of improved ground because inadequate failure modes are assumed. However, as far as the author knows, there have been few cases recorded of serious failure or large deformation in the group column type improved ground under embankment loading. This is a discrepancy against the overestimation in the current design method. In this paper, a parametric calculation on evaluation of the stability of column type DM improved ground was carried out to investigate the characteristics of the current and the proposed design methods.
deep mizing soil stabilization design deformation embankment failure soft ground stability
Masaki KITAZUME
Port and Airport Research Institute, Japan
国际会议
International Symposium on Geoenvironmental Engineering(国际环境岩土工程研讨会
杭州
英文
920-925
2009-09-08（万方平台首次上网日期，不代表论文的发表时间）