Compaction Of Soil

Introduction:-

Soil compaction is the process where soil particles are forced to pack more closely by reducing air voids. This can be achieved by applying some mechanical energy (dynamic or statics) on the soil.

Dynamic:- Repeated application of dead load and this is better for coarse-grained soils.

 Static:-  Steady increase of static load and this is better for fine-grained soils.

Difference between Compaction and Consolidation

 Compaction:-

                     i.            Instantaneous phenomenon

                   ii.            Soil is unsaturated

                 iii.            Reduction in the volume of air voids at given water content

Consolidation:-

                                i.            Time dependent phenomenon

                              ii.            Soil is completely saturated

                            iii.            Volume reduction is due to the expulsion of pore water from voids

                           iv.            it’s occur on account of a load placed on the soil

Advantage of compaction

                              i.            Increase in shear strength of soil

                           ii.            Improve stability and bearing capacity of soil

                        iii.            Reduction in compressibility and permeability of the soil

                         iv.            Increase load-carrying capacity of soil subgrade

                            v.            Prevention of determental settlements

                         vi.            Prevention also, undesirable volume changes through swelling and shrinkage