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Geotechnics

Course developer

Prior knowledge

BūvZ6024, Advanced Structural Mechanics

BūvZ6026, Finite Element Method

Course abstract

The study course examines the specifices of design and execution of the foundations in low capacity and frost-sensitive soils; the types of artificial subbase soils and their application, as well as the improvement of the subbase soil by means of soil reinforcement. Foundation settling in time is also examined to design the subbase soil by deformation; the foundation design features of rebuildable buildings and the methods for reinforcing the subbase soil and foundations are explored. Foundation design issues are addressed in line with 7. Eurocode requirements.

Learning outcomes and their assessment

Knowledge: the student gains knowledge of low capacity and frost-sensitive soils and artificial bases; reconstruction of structures foundation and bases. Oral examination. Skills: the student gains the skills of foundation design in low capacity and frost-sensitive soils; designing the foundations of rebuildable buildings. Calculation paper. Competence: the ability to assess the application of different artificial subbase soils in the case of a soft subbase; gains competence in the design of the foundations of rebuildable buildings. Examination (written-oral)

Course Content(Calendar)

1. The objective of the course; content and mastering of the programme. Strength and persistence of the subbase soils.(3h)
2. Soil boundary balancing theory.(3h)
3. Frost-sensitive soils; level of frost sensitivity.(2h)
4. Foundations in frost-sensitive soils; constructive solutions.(3h)
5. Thermal design of foundations.(3h)
6. Rheology processes in subbase soils.(3h)
7. Subbase soil settling in time.(3h)
8. Foundations in soft soils. Types of artificial subbase soils.9(4h)
9. Design measures for the reinforcement of the subbase soils by applying geosynthetic materials.(3h)
10. Mechanical densification of the soil; types and uses of densification.(3h)
11. Physical densification of the soil; methods and applications.(3h)
12. Subbase soil fixing; methods and applications. (2h)
13. Design of rebuildable building foundations; foundation interdependence (4h)
14. Reinforcement of subbase soil; methods and structural solutions.(3h)
15. Reinforcement and replacement of shallow foundations; structural solutions.(4h)
16. Reinforcement and replacement of pile foundations; structural solutions.(2h)

Requirements for awarding credit points

Presentations of two topics must be prepared and presented. After a successful presentation, an exam has to be passed.

Description of the organization and tasks of students’ independent work

1. Presentation on the foundation on low capacity (or frost-sensitive) soils.
2. Presentation on the design of rebuildable building foundations and the reinforcement of foundations (or subbase soils).

Criteria for Evaluating Learning Outcomes

The grade of examination is obtained as an assessment average of the two presentations and of the following discussions.

Compulsory reading

1. Han, Jie. Principles and Practices of Ground Improvement /Jie Han. Hoboken, New Jersey: Wiley, 2015, 418 p.
2. Hoe I. Ling, Dov Leshchinsky, Fumio Tatsuoke. Reinforced Soil Engineering. Advance in Research and Practice.Marcel Dekker, Inc.New York.Bosel.2003. 512 p.
3. Коновалов П. А. Основания и фундаменты реконструируемых зданий. – 2-е изд., перераб. и доп. – Москва: Стройиздат, 1988. – 287 с.
4. Сотников С. Н. и др. Проектирование и возведение фундаментов вблизи существующих сооружений / С. Н. Сотников, В. Г. Симагин, В.П. Вершинин; Под ред. С. Н. Сотникова. – Москва: Стройиздат, 1986. – 96 с.: ил.

Further reading

1. LBN 207-15 Ģeotehniskā projektēšana.
2. Eirokodekss 7: Ģeotehniskā projektēšana 1. Daļa: Vispārīgie noteikumi; [LVS EN 1997-1+AC:2004 (LV)].
3. Eirokodekss 7. Ģeotehniskā projektēšana. 1.daļa: Vispārīgie noteikumi. Nacionālais pielikums [LVS EN 1997-1+AC:2014 (LV)].
4. LVS EN ISO 13793:2003 L. Ēku siltumtehniskās īpašības – Pamatu termiskā projektēšana, lai izvairītos no grunts izcilāšanās salā / EN ISO 13793. Thermal Performance of Buildings – Thermal Design of Foundations to avoid Frost Heave.

Periodicals and other sources

4. Būvinženieris: Latvijas Būvinženieru savienības izdevums. Rīga: Latvijas Būvinženieru savienība. ISSN 1691-9262.

Notes

Professional Master's study programme “Civil Engineering”