BIRBHUM INSTITUTE OF ENGINEERING & TECHNOLOGY 11801322017_CE(PC)504.pptx

BIRBHUM INSTITUTE OF ENGINEERING & TECHNOLOGY

1. Birbhum institute of engineering & technology Name_ SOMENATH MANDAL Department _ civil engineering Roll no_1180132201 7 Reg no_ 221180120133 Semester_5 th Session_2022_23

2. Presentation details Class assesment_1 Subject_ soil mechanics Subject code_ CE(pc)504 Topics name_“ compaction and consolidation a comparative study”

3. Soil Soil, also commonly referred to as earth, is a  mixture  of  organic matter ,  minerals ,  gases ,  liquids , and  organisms  that together support  life  of plants and soil organisms. Some scientific definitions distinguish  dirt  from  soil  by restricting the former term specifically to displaced soil. Soil consists of a solid phase of minerals and organic matter (the soil matrix), as well as a  porous  phase that holds  gases  (the soil atmosphere) and  water  (the soil solution). [1] [2]  Accordingly, soil is a three- state  system of solids, liquids, and gases. [3]  Soil is a product of several factors: the influence of  climate ,  relief  (elevation, orientation, and slope of terrain), organisms, and the soil's  parent materials  

4. Physical properties of soil The physical properties of soils, in order of decreasing importance for ecosystem services such as  crop production , are  texture ,  structure ,  bulk density ,  porosity , consistency,  temperature ,  colour  and  resistivity . [58]  Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates:  sand ,  silt , and  clay . At the next larger scale, soil structures called  peds  or more commonly  soil aggregates  are created from the soil separates when  iron oxides ,  carbonates , clay,  silica  and  humus , coat particles and cause them to adhere into larger, relatively  stable  secondary structures. [59]  Soil  bulk density , when determined at standardized moisture conditions, is an estimate of  soil compaction .

5. Soil  water content  can be measured as volume or  weight . Soil moisture levels, in order of decreasing water content, are saturation,  field capacity ,  wilting point , air dry, and oven dry. Field capacity describes a drained wet soil at the point water content reaches equilibrium with gravity. Irrigating soil above field capacity risks percolation losses. Wilting point describes the dry limit for growing plants. During growing season, soil moisture is unaffected by functional groups or specie richness. Available water capacity  is the amount of water held in a soil profile available to plants. As water content drops, plants have to work against increasing forces of  adhesion  and  sorptivity  to withdraw water.  Irrigation scheduling  avoids  moisture stress  by replenishing depleted water before stress is induced.

6. Compaction

7. Laboratory test

8. Procedure

9. Compaction and consolidation

10. Shear strength of soil

11. Defination

12. Mohr circle/ theorey

13. Stress distribution in soil

14. Site investigation

15. Standard penetration test

16. Reference Help from internet following website Have been used in the completion of this class assesment The main topics of this assesment are Types of soil Soil and its component Origin of soil Penetration test Soil formation Etc Following books are used to have an idea of this assesment

17. Thank you.