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BASIC ELEMENTS OF A RUBBER DAM

A weir consists of three main parts:

 

1 – concrete foundation
2 – rubber membrane
3 – shaft for dam manipulation.

 

BASIC ELEMENTS OF A RUBBER DAM

binding of metal frames and anchors

binding of metal frames and anchors of lower fixity of a dam prior to concreting

 

1. Concrete foundation of the dam

 

A concrete foundation of the dam is a concrete river bed where pipes for filling the rubber membrane are placed. Elements for fixing the rubber membrane are also anchored in the concrete foundation. The concrete foundation of the dam consists of the following parts:

  • A concrete part, to which the rubber membrane of a dam is attached, consists of a straight central part and slanting parts on the left and right river banks. The concrete part must be at least 450 mm thick, adequately reinforced with concrete iron and made of concrete of a suitable quality.
  • A filling shaft, pipes for filling up and emptying the rubber membrane, and a measuring sound for measuring membrane pressure are also placed in the concrete foundation of the dam. The filling shaft must be moved as close to the inner attachment of the membrane as possible, so it can enable emptying of the membrane. Pipes for air deflation from the upper parts of the dam for complete emptying of the membrane are welded to inner attachment. Filling shaft and pipes are properly set and welded prior to concreting.
  • Profiles of lower parts of the system, used for fixity of the rubber membrane, are also placed in the concrete foundation. The profiles with anchors made of ferroconcrete steel represent additionally anchored concrete foundations of the dam. Prior to concreting they are placed at a proper angle and welded.

1. BetoConcrete foundation of the dam

 

2. Rubber membrane of the dam

 

It is made of quality rubber, highly resistant to ozone, water, oil, crude oil derivatives, chemicals, wear and atmospheric influence. The rubber membrane material is composed of a high quality EE fabric. The inner side of the fabric is rubberized with CD rubber and outer side with CD/CSM rubber. Rubber membrane is 6 mm thick, which means that there is approximately 3 mm of material on each side.


Rubber

CR/CSM rubber provides an exellent resistance against influences of UV raws, ozon and other heavy weather conditions.

 

Fabric
EE (polyester)Fabric coated by CR/CSM provides an exellent resistance against influences of UV raws, ozon and other heavy weather conditions.

 

 

3. Shaft for rubber dam manipulation

 

A shaft for weir manipulation contains all of the systems necessary for operating the weir. These are the following:

  1. Part for charging (electrical installation).
  2. Part for manipulation consists of electronic systems which manage the weir and supervise its functioning. These are the following: electronic panel, steering mechanism, level measuring equipment, equipment for measuring membrane pressure and GSM modem with antenna for reporting trouble or damage.
  3. Installation system for filling or emptying the rubber membrane of the weir.
  4. Safety closing valve (installation system of protection in case of too high waters).

 

Shaft for rubber dam manipulation

Shaft for manipulation of the air-filled rubber dam.

 

 


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