Dilatometer Test in Geotechnical engineering an over view .pptx

Dilatometer Test

1. Dilatometer Test in Geotechnical Engineering Overview and Analysis of DMT Parameters and Correlations Presented by: [Your Name/Team Name] Date: [Date]

2. Abstract The Dilatometer Test (DMT) is a modern in-situ testing device, enhanced by seismic dilatometer capabilities. Primary Indices: - Material Index (ID) - Horizontal Stress Index (KD) - Dilatometer Modulus (ED) Purpose: Soil type identification and parameter determination.

3. Introduction Origin: Developed by Dr. Sylvano Marchetti in 1975, Italy. Apparatus Details: - Stainless steel blade with expandable steel membrane. Test Process: - Blade penetration and pressure readings (A, B, C) for soil assessment. Applications: - Shear wave velocity measurement with seismic dilatometer.

4. Intermediate DMT Parameters Key Parameters: - Material Index (ID): Differentiates soil types (e.g., clays, silts, sands). - Horizontal Stress Index (KD): Indicates stress history and soil's resistance to volume changes. - Dilatometer Modulus (ED): Provides insights into soil modulus. Equation Highlights: - ID, KD, and ED are derived empirically.

5. Correlations Soil Identification: - Chart based on ID and ED to categorize soil types. Over-consolidation Ratio (OCR): - Relationship with KD for clays and sands. Shear Strength and Friction Angle: - Derived using ID, KD, and ED values.

6. Summary Overview: - DMT as a reliable tool for in-situ soil characterization. - Significant contributions to understanding soil stiffness and stress history. Applications: - Geotechnical engineering designs, settlements, and stress predictions.