Dear reader in last part we have learned about some measures to control failure of slope of soil mass in natural or man-made excavation slope. The rest measures are:
f. Retaining walls and sheet piles can be constructed to increase stability of slope by providing lateral support. But when economy is concerned these are very expansive measure. In construction of these structures care should be taken to provide adequate drainage, otherwise such massive structure may collapse.
g. In specific zone of earth slope application of grouting and injecting cement or similar compounds also help to increase stability of slope.
h. For cohesive soil expelling out of water by consolidation is also a measure to increase stability of soil mass at slope. In this purpose we can use surcharge, electro-osmosis and any other method that consolidate soil.
i. In case of cohesionless soil we can increase shear strength of soil by densification of soil mass. We can use here
- Terra probe
The increase is shear strength obviously increase stability of soil slope.
Application of explosive was discussed in this blog. Vibroflotation is a method to compact soil up to 30 m depth. The vibrofloat have a rotating mass placed eccentrically which results horizontal vibration when sunk is desired depth. It is generally applicable to sandy soil. Terra probe is a similar method of vibroflotation techniques but less effective than vibroflotation method.
Of these measures, considering economy, if possible, relatively less expansive methods like drainage control and flattening of slope control are usually preferred.