Question

what is the importance of soil consistency
and the methods of improving it

Answer 1

According to Russell and Russell (1950), “Soil consistency designates the manifestations of the physical forces of cohesion and adhesion acting within the soil at various moisture contents including the behaviour towards gravity, pressure, thrust and pull, tendency to adhere to foreign bodies and the sensations

Answer 2

Answer:

Soil consistency is the strength with which soil materials are held together or the resistance of soils to deformation and rupture. Soil consistency is measured for wet, moist and dry soil samples. For wet soils, it is expressed as both stickiness and plasticity, as defined below. Soil consistency may be estimated in the field using simple tests or may be measured more accurately in the laboratory

method of improving soil consistency-

1)In-Situ Deep Compaction of Cohesionless Soils

2)Injection and Grouting

3)Precompression

4)Admixtures

5)Thermal

6) Reinforcements

1. In-Situ Deep Compaction of Cohesionless Soils

-It is a technique used for in-situ densification of cohesive soil deposits by heavy impact, vibration, and blasting. It involves the rearrangement of the cohesionless soil structure from a loose to a dense state.

2. Injection and Grouting- Injecting and grouting improve the strength and stiffness of the soil by high-pressure injection of a cementitious grout mix through a small-diameter casing at a pre-determined depth. This type of soil improvement method is used in the construction of dams, lock structures, and tunnels.

3. Pre-compression- Pre-compression is a ground improvement method that compresses the ground under applied pressure before putting or finishing the structural load.

4. Admixtures- The modification of any one or more of the soil properties improves the strength of soil and decreases shrink-swell soil characteristics by using admixtures such as lime, cement, and cohesive-non-swelling (CNS) layer.

5. Thermal- Thermal soil improvement is carried out in 2 methods-

I)Heating: The removal of heat from the soil, turning its pore water into ice, is a powerful technique that renders the ground impermeable and makes them more robust for unconsolidated materials.

2)Freezing: Applying heat to clays to drive out free pore water and, at higher temperatures, the water adsorbed on particle surfaces creates a tough, durable material, as when making brick or mud building blocks.

6. Reinforcement- Reinforced soil reinforcement is a technique used to improve the stiffness and strength of soil using methods such as reinforced soil, soil nailing, root or micro-piles, slope dowels, and embankment piles.