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You are here: Home / Soil Mechanics 2 / Types of Earthen dams | Rock fill earth dams | Earth rock dams

Types of Earthen dams | Rock fill earth dams | Earth rock dams

May 29, 2012 by admin Leave a Comment

Types of Earth dams

There are following types.

Rock fill earth dams

Rock fill dams are special types of earth dams that is made of cobble to boulder size rock fragments.

There is an internal concrete wall acting as the impervious barrier.

Earth rock dams

Earth rock dams are a hybrid that use rock fill shells and a compacted soil core.

Homogeneous dams

For dams of medium to low height, these are made. The entire embankment is made of the same material. Low dams are always constructed as homogeneous dams.  Because by making zones, cost will increase due to complication in construction.

Zoned dams

In zoned dams, generally, the well drained materials such as sand, gravel etc., are placed in the outer shells whereas the clay soil is placed in the central zone. This will increase the water tightness of the dam. The shells provide main strength to the dam embankment.

Earth rock dam is an example of zoned dam. Their shells are filled with rock and central core is filled with compacted soil.

Reference :

Geotechnical engineering principal and practices by Donald P Coduto

Fundamentals of soil mechanics by Dr. Aziz Akbar and M.Siddique Qureshi

 

Filed Under: Soil Mechanics 2

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