Author Archives: Namita

Rapid Impact Compaction | Ground Improvement | Advantages

Rapid Impact Compaction Rapid Impact Compaction is a shallow ground improvement and densification technique. This method densifies shallow, granular soils, which repeatedly strike an impact plate on the ground surface using a hydraulic hammer. The energy is transferred to the underlying loose soils and regroups the particles into a denser formation. The impact locations are… Read More »

DEEP SOIL MIXING FOR GROUND IMPROVEMENT

DEEP SOIL MIXING The properties of soft cohesive soils can be improved by mixing of a variety of chemical additives. The addition of lime, fly ash and cement in different combinations can significantly improve the shear strength and compression properties of such soils. Other additives can be used to fix pollutants in place to prevent… Read More »

WICK DRAINS FOR GROUND IMPROVEMENT

Wick drains & Vertical Soil Drains Wick drains, also called Prefabricated Vertical Drains, are installed in soft soils in order to accelerate consolidation of the soil by providing additional drainage paths for pore water to escape. Other names and variations of this technique are: deep drains, sand drains, sand wicks, band drains, pre-fabricated band-shaped drains.… Read More »

GROUND TREATMENT WITH LIME COLUMNS & CEMENT COLUMNS

Lime Columns Method Lime columns method is a variation of deep soil mixing, in which unslaked quicklime is used instead of cement or mixed with cement. The lime columns are suitable at best for stabilization of deep soft clay deposits. A pozzolanic reaction takes place between the lime and the clay minerals resulting in substantial… Read More »

DYNAMIC COMPACTION | GROUND IMPROVEMENT | ADVANTAGES

Dynamic compaction of Soil Dynamic compaction is a ground improvement technique in which a drop weight is used to densify the soils and fill materials. The drop weight is typically made of steel and is lifted by a crane and repeatedly dropped onto the ground surface. The vibrations that are resulted from the repeated drops,… Read More »

Calculation of Lap length in Reinforced Concrete Structures

Lap length in Reinforced Concrete Lap length is one of the important term in the reinforcement. This is usually confused with another important term called development length and anchorage length. In this article, the lap lengths of bars is discussed. During the placement of steel in Reinforced concrete structure, if the required length of single… Read More »

Axial Capacity of Steel Column or Strut

Capacity of Steel Column Columns are those structural elements which predominantly carries axial compression in a structural system. In steel construction, the column is the vertical member which is subjected to axial load and strut is the inclined member subjected to the same. Steel is a very strong material but it does lead to slender… Read More »

Cathodic Protection | Types of Cathodic Protection | Applications

Cathodic Protection Cathodic protection is an approach which is employed to control the corrosion that occurs on the surface of the metal by making it the cathode of an electro-chemical cell. This procedure is quite simple which involves the connection of the metal to be protected, to a more easily corroded metal which is usually… Read More »

Types of Dams | Classification of Reservoirs

Types of Dams A dam is a hydraulic structure or assembly that is constructed across a river to form a reservoir on its upstream side for confining water for various purposes like Hydropower, water supply, flood control, navigation, fishing and recreation, irrigation. Dams are constructed depending on the purpose for which they are used. Different… Read More »