Stability of earth dam contaminated by chemical transport

✍ Scribed by Ahn, Taebong; Desai, Chandra S.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 207 KB
• Volume: 23
• Category: Article
• ISSN: 0363-9061
• DOI: 10.1002/(sici)1096-9853(19991225)23:15<1893::aid-nag25>3.0.co;2-4

✦ Synopsis

When chemicals are introduced into the oil, they a!ect soil properties such as hydraulic conductivity and stress}strain behavior. In this study, several chloride concentrations are varied from 0 to 20 per cent to analyse the e!ect of chemicals on soil properties. A series of laboratory triaxial tests are performed on the cylindrical specimens of sand}bentonite mixture with di!erent sodium chloride contents (5, 10, 15 per cent) by Nannapaneni. Deformation (elastic modulus, E) and strength (cohesion, c, and angle of friction, ) parameters are obtained from the triaxial tests as functions of con"ning pressure and sodium chloride concentrations, and variations of parameters are incorporated into stability analysis.

The stress}strain}strength behaviour based on the above strength parameters is introduced in a "nite element procedure with a modi"ed residual #ow procedure (RFP). By integrating a slope stability procedure in the "nite element method, the stability with time of earth dam contaminated by sodium chloride is examined. It is found that increasing sodium chloride concentration for the soil considered increases stability. However, the procedure is general and can allow stability analysis under the in#uence of other chemical which may lead to decrease in stability.