The following methods are undertaken for the enhancement of the ground :-
Replacement of soil, Precompression of soil, Densification of soil, Reinforcement of Techniques, Grouting techniques, Stabilization using admixture, Geo textiles, Electro osmosis method.
Replacement of soil: Under this method, the unacceptable soil is uncovered and they are replaced with compacted fill. It is a standard method to rectify the issues with compressible soils. Evacuation and substitution is normally judicious just over the ground water table.
Pre-compression of soil: It is particularly suitable in soft clay and sandy or mud soils since the static weight of the fill motivates them to consolidate, thus making both settlement and strength properties superior.
Pre-compression offers the following benefits:
1. The method provides a long track record of success.
2. Any grading contractor will be able to execute the work.
3. The cost is moderately low, provided that soil for preloading is instantly available.
Densification of soil: The stability and firmness of the soil remains greater when the particles are stuffed in a dense configuration. It is very suitable for making the characteristics of the soil better.
It can be done in the following manners : VIBRO TECHNIQUES and DYNAMIC COMPACTION
Reinforcement of Techniques: The shear strength under the structures is raised with the utilization of stone columns. The method comprises of developing vertical holes in ground which are stuffed with compacted crushed stone, gravel and sand or a mixture.
PERMEATION GROUTING - Stopping leaks in below-grade structures, Stopping leaks in below-grade utilities, Excavating support of non-corrosive soils
JET GROUTING: Jet grouting applies a special pipe that is provided with horizontal jets to inject grout into the soil at high pressure.
Stabilization with admixture: SOIL STABILIZATION: It is the method of engineering characteristics of soil with the inclusion of some binding agents to join the soil particles. Soil stabilization is categorized as follow :-
1. Mechanical stabilization
2. Chemical stabilization
Geo textiles: Geotextiles stand for permeable fabrics manufactured products and there are other materials like polyester, poly-ethylene, polypropylene and poly vinyl chloride, nylon, fiber glass and different mixtures of these.
Electro osmosis method: The electro osmosis method is utilized to improve the shear strength and decrease the compressibility of soft clay and sandy soils underneath foundation, electro osmosis with or without electrochemical hardening is taken into consideration only for special occasions where the substitute of piling cannot be embraced.