会议专题

EVALUATION OF THE PERMEABILITY FUNCTION OF A DUNE SAND FROM THE ALGERIAN SAHARA

Many geotechnical and geo-environmental problems involve water flow through unsaturated soils. The laboratory procedures for the measurement of the coefficient of permeability for unsaturated soils are tricky, error-prone and time consuming especially for low suction conditions. Indirect evaluation of the unsaturated permeability function of soils can be performed by using several available prediction models. The indirect estimation is desirable over the measurement due regard to its simplicity and low cost provided of course the accuracy of the estimate were acceptable. The objective of the work presented in this paper is to demonstrate the relative merit of some of the well known of these models in estimating the permeability function of a dune sand from the Algerian Sahara. It is shown that the permeability function of the sand under study can be predicted reasonably well by most of the models tested. Likewise, the approach using an unsaturated database querying yielded equally good function predictions. These results lend more support to the capability of indirect methods for the development of the unsaturated soils mechanics practice.

Z.Derriche M.Lamara

National School of Public Works, Algiers, Algeria Civil Eng.Dept., Laghouat university, Algeria

国际会议

第三届亚洲非饱和土学术会议

南京

英文

197-202

2007-04-21(万方平台首次上网日期,不代表论文的发表时间)