Geotechnical Engineering Syllabus Diploma in Civil Engineering, Regulation 2010
- To enable to understand of the origin, composition, classification and properties of soil.
- To assist in understanding the plasticity characteristics and hydraulic properties of soil.
- To assist in understanding the consolidation characteristics of soil.
- To assist in understanding the lateral earth pressure of soil.
- To provide understanding of the site investigation and method of sample collection.
- To provide basic field skill for collection of soil sample.
- To provide basic laboratory skill required to determine soil properties and to perform the relevant calculations.
Introduction to geotechnic ; Preliminary definition and simple tests; Particle size of soil; Plasticity characteristic of soil; Hydraulic properties of soil; Consolidation characteristics of soil; Subsurface investigation; Lateral earth pressure; Bearing capacity of soil.
INTRODUCTION TO GEOTECHNIC
- Understand the basic concept of geotechnic.
1.1 Define rock, soil and soil engineering.
1.2 Describe origin and formation of soil.
1.3 Describe historical origin and formation of soil of Bangladesh.
1.4 Explain limitation of soil engineering.
1.5 Mention the soil classification system.
1.6 State textural, AASHO and unified ASTM system.
1.7 State field identification test such as; dilatancy, toughness, dry strength test.
1.8 List general properties of soil.
PRELIMINARY DEFINITION AND SIMPLE TESTS
- Understand preliminary definitions and simple test soil.
2.1 Define the following terms: void ratio, porosity, degree of saturation, percentage of air voids, air content, water content, bulk unit wt, dry unit wt, saturated unit wt, submerged unit wt, unit wt. of solids, specific gravity of solids, density index.
2.2 Explain three-phase diagram in terms of void ratio.
2.3 Explain three-phase diagram in terms of porosity.
2.4 Solve problems on soil properties.
2.5 Explain oven drying method of water content determination.
2.6 Explain specific gravity determination by pycnometer method.
PARTICLE SIZE OF SOIL
- Understand the particle size of soil.
3.1 Define index properties of soil.
3.2 State mechanical analysis of soil.
3.3 Describe sieve analysis.
3.4 Mention and derive stokes law.
3.5 Describe particles size analysis by hydrometer.
PLASTICITY CHARACTERISTICS OF SOIL
- Understand the plasticity characteristics of soil.
4.1 Define: plasticity of soil, Atterberg limit, liquid limit, plastic limit, shrinkage limit, plasticity index, liquidity index, consistency index, flow index and toughness index.
4.2 State the method of measurement of consistency.
4.3 Define the terms: sensitivity and thixotropy.
4.4 List the uses of consistency (Atterberg) limits.
HYDRAULIC PROPERTIES OF SOIL
- Understand the hydraulic properties of soil.
5.1 Define the following: Permeability of soil, hydraulic head, piezometric head, position head and Darcy’s law.
5.2 State the meaning of constant head and variable head permeability test for determination of co-efficient of permeability.
5.3 Describe the pumping out tests for determination of coefficient of permeability.
5.4 Compute effective pressure and pore water pressure.
5.5 List the factors affecting permeability of soil.
5.6 Define seepage pressure, seepage velocity, equipotential line and flow net.
CONSOLIDATION CHARACTERISTICS OF SOIL
- Understand the consolidation characteristics of soil.
6.1 Define consolidation and initial, primary and secondary consolidation.
6.2 State behavior of saturated soil under pressure.
6.3 Draw consolidation characteristics of preloaded deposits.
6.4 Identify triaxial compression test apparatus.
6.5 Interpret the results of triaxial tests.
6.6 Explain unconfined and confined compression test.
6.7 Differentiate between consolidation and compaction.
6.8 State standard proctor test of compaction and standard proctor moisture density curve for material.
- Understand the purpose of subsurface investigation.
7.1 State the meaning of subsurface investigation of soil.
7.2 Mention the stages in subsurface explorations.
7.3 Mention the purposes of subsurface investigation of soil.
7.4 Compute the depth and lateral extent of explorations.
7.5 Describe the open excavation methods of explorations.
7.6 Describe auger boring, wash boring, rotary drilling, percussion drilling and core boring.
7.7 Identify various types of soil samples.
7.8 Identify split barrel sampler, spring core catches, scraper bucket and piston sampler for collecting samples.
7.9 Describe the method of standard penetration test.
7.10 State the procedure of writing subsoil investigation report.
LATERAL EARTH PRESSURE
- Understand the aspect of lateral earth pressure.
8.1 State the meaning of at-rest pressure, active earth pressure and passive earth pressure.
8.2 explain active and passive earth pressure of Rankine’s theory with non-surcharge.
8.3 State the formula of active earth pressure of Rankine’s theory with surcharge.
8.4 State the fundamental assumptions of Coulomb’s wedge theory.
8.5 State the formula of active earth pressure of Coulomb’s theory with surcharge.
BEARING CAPACITY OF SOIL
- Understand the bearing capacity of soil.
9.1 Define bearing capacity of soil.
9.2 Correlate between penetration resistance and unconfined compressive strength for cohesive soil.
9.3 Correlate between penetration resistance and angle of shearing resistance for cohesion less soil.
9.4 Explain the bearing capacity from Standard Penetration Test (SPT).
9.5 List the causes of foundation settlement.
- Determine the water content of soil by oven drying method.
- Determine the specific gravity of soil by pycnometer method.
- Determine the particle size of soil by sieve analysis.
- Determine the particle size of soil by hydrometer analysis.
- Determine the liquid limit of soil by casagrand’s apparatus.
- Determine the plastic limit of soil.
- Determine the co-efficient of permeability of soil by constant head test.
- Collect the sample of soil by wash boring method.
- Determine the bearing capacity of soil from Standard Penetration Test (SPT).
- Determine the amount of compaction and the water content by standard proctor test.
- Determine the shear characteristics of soil by unconfined compression test.
12. Perform the consolidation test.