Page - 1399 - in Book of Full Papers - Symposium Hydro Engineering

Regulation of the upstream level will take place by means of a probe- controlled system. A self-functioning automatic discharge is installed for emergency release. All steel components are hot-dip galvanized; the piping embedded in concrete is made of PE. All screws and bolts are of stainless material. The control system of the main sections can be operated in manual and automatic mode. Every single section of the rubber dam system can be operated separately. Central control for automatic operation of the rubber dam will be coordinated by means of a PLC and is in a switchboard panel in the control building. 2.4. MAIN DESIGN CONSIDERATIONS Calculation of the membrane forces assuming firmly inflated water inflated rubber dam shape according to the following figure and equation formula. Fig. 6 Inflation pressure coefficient for water filled systems T= 1 4 (2α−1)ρwghs 2 [1] The result of calculation is given in the next following table. The estimated tension force in the membrane has to be held by the membrane and the anchoring system. 1399