Category: Cofferdams

Braced cofferdams are the sheeting and bracing systems to support walls of an excavation or to exclude water from an excavation. It is mostly used in urban areas. They are frequently used in the construction of bridge piers and abutments, The various components of braced cofferdams are: Laggings – Horizontal timber planks placed by hand as the excavation proceeds. Sheet piling – Timber, steel or concrete sheet piles installed vertically by driving. Soldier beams – Vertical beams of timber or steel for taking reaction from laggings. They are not required…

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A cellular cofferdam is constructed by driving sheet piles of special shapes to form a series of cells. The cells are interconnected to form a watertight wall. These are filled with soils to provide stability against the lateral forces. There are two types of cellular cofferdams, namely diaphragm type cellular cofferdam and circular type cellular cofferdam. Diaphragm Type cellular cofferdam | Cellular Cofferdams | Types of Cellular Cofferdams This type of cellular cofferdam consists of circular arcs at the inner and outer sides, which are connected by straight diaphragm walls. A…

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A cofferdam is a temporary enclosure in a river or lake built around a working area for the purpose of excluding ground water and water above ground level during construction. Types of cofferdams There are various types of cofferdams. They include: Cantilever Sheet Pile Cofferdam Braced Cofferdam Earth Embankment Cofferdam Rockfill Cofferdam Double Wall Cofferdam Cellular Cofferdam Cantilever Sheet Piles | Cofferdams | Types of Cofferdams Cantilever sheet piles are suitable for small head of water about 6 m. They are susceptible to large leakage and flood damage. They can be…

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