Rubber dam


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Rubber dam

  1. 1. •             Advantages of Rubber dam. What is rubber dam Construction of Rubber dam Operation mechanism(Automatic control mechanism) Use of a rubber dam in hydropower plant Selection of a Rubber dam site New types of rubber dams Rubber dam: New hope for farmers? Rubber Dam Applications Rubber dam manufacturers Future plan of work in India Conclusion References
  2. 2.   Easy installation Lower investment cost ( about 40%) than the conventional gated regulating structure  Ground re-charging  4733 Increase of per capita water storage capacity and water use efficiency Other purposes: irrigation, water supply, power generation, tidal barrier ,environmental improvement. Russia China 1964 1111 207 6103   India’s per capita water storage Better control of flood and draught. Australia India USA
  3. 3.  Basically rubber dams are fabric reinforced rubber bags, which can be inflated or deflated by water or air. The fabric gives the necessary strength where as rubber acts as a shock absorber and water proofing material. • It function as a reliable crest-adjustable water gate.  Construction of Rubber dam  Concrete base slab & side walls Anchorage Dam bag /Membrane Water or air filling & draining system/Control system   
  4. 4. Rubber dam Concrete structure Anchoring This figure shows how rubber body is secured to a concrete foundation by its anchor line.
  5. 5. Concrete Base Slab:  Concrete slab is provided as a base for rubber construction.  The side walls of the dam should be vertical or inclined Anchorage:  Dams are secured to the concrete foundations using a single or dual core clamping plates  Plates are clamped to the membrane using anchor bolts
  6. 6. Dam bag /Membrane:   The rubber dam body is a membrane of rubberized fabric, which is composed of layers of synthetic rubber and layers of synthetic fiber reinforcement that are firmly bonded together by vulcanization. Physical-mechanical properties of the dam membrane are given by  tensile strength  elasticity and flexibility  ozone-resistance  high-temperature and low-temperature resistance  abrasion-resistance  weather-resistance  specific life strength
  7. 7. Inflation: An air blower or water pump and ancillary devices such as valves are used to inflate the air or water filled dam respectively. Deflation: There are three types of deflation systems: bucket, float, and electrical. Safety systems: An air blow-off tank(air-filled dam) and siphon pipe(water-filled dam) can be used as a safety device in case principal deflation mechanism fails
  8. 8.     A pressure sensor is used to monitor the inner pressure of the dam body. The inlet of air/water to the dam body is cut off automatically when inner pressure reaches the preset level. A laser height measuring device can be installed inside the dam body. A sensor monitors water level. The exhaust valve is opened automatically as deflation level is reached.
  9. 9. Bridgestone Inflatable /Deflated Dam on Susquehanna River at Sunbury, Pennsylvania
  10. 10. Water filled rubber dam: Air filled rubber dam: Advantages  The weight of the water-filled dam prevents vibrations.  The entire height of the dam rises or lowers evenly. Weaknesses  More expensive construction: a wider concrete sill, more expensive water pumps, more expensive pipelines due to a bigger diameter of pipes.  Manipulation takes more time (filling up and emptying the weir).  Freezing of the weir (the possibility of water freezing in the system).  Vandalism (puncturing, cutting). Advantages  Faster lowering and raising of the weir.  Cheaper construction.  Lower power consumption. Weaknesses  Vibrations of the weir.  Uneven emptying of the weir (sinking of the centre of the weir).  Vandalism (puncturing, cutting).
  11. 11. Measures to reduce vibration › Fin structure › Semi-circle shape › Double-line anchoring › Hose Spacers
  12. 12.  In the site selection following condi -tions should be considered:        Straight section Smooth Flow Riverbed and Bank slopes are stable. Geological Hydrologic Meteorological hydraulic conditions • It is better to carry out the construction of civil works related to the rubber dam in a dry season
  13. 13. Power of a hydroelectric power plant depends also on the speed of the river and that the power expressed in percentage increases more at the rivers where the fall is smaller. The percentage of the increase of the power is calculated in the following way: %P = the percentage of the increase of power in a hydroelectric plant h2 = the height of the increase of the fall in a hydroelectric power plant h1 = the initial height of the fall in a hydroelectric power plant
  14. 14. Tin Shui Wai Rubber Dam Hong Kong Janjhavathi Rubber Dam (India) irrigates 24,000 acres Rubber weirs at the river Sava in Kranj Rubber Dam ,Bhubaneshwar, Orissa
  15. 15.  Rubber dam with inspection gallery: Some large dams of Bridgestone and Sumitomo have an inspection gallery . An access door and air-lock system are provided to allow entry into the dam when its in the inflated mode.  Rubber dams with different deflation modes: New types can deflate in both the upstream and downstream directions according to the direction of flow or deflate directly onto the foundation.  Innovative fish-way: The rubber dam can be incorporated into a fish-way.
  16. 16.  Impact of Rubber Dam on crop productivity of summer vegetables at Baghamari,Orissa. S.NO. Productivity(t/ha) Before Installation of Rubber Dam(2009) 1. After installation of Rubber Dam (2010 ) 2.873 4.67
  17. 17. HYDRO POWER Project: Rainbow Dam Country: USA Size: 3.66Hx67.7L WATER SUPPLY Project : Gubeng Dam Country : Indonesia Size : 2.85Hx12.0L GROUND RECHARGING Project : Alameda Country : USA Size : 3.96Hx88.8L TIDAL BARRIER Project : Naruse River Country : Japan Size : 2.3Hx42.1L
  18. 18. Purpose Dam/Project Name Country Height (m) Width (m) Groundwater recharge Sonoma Dam USA 3.3 36.9 Hydropower Glenford dam Canada 1.7 74.7 Irrigation Lamchi Muang Ling Dam Thailand 4 73 Increasing reservoir capacity Mirani Weir Australia 1.8 107.3 Navigation Tsudae Dam Japan 1.5 20 Recreation Shin Chon Dam Korea 1.5 50.65 Rehabilitation Vaca Dam Philippines 2.0 13.3 Drinking water Altoona Dam USA 1.53 35.7 Flow control (sewerage) Ichioka Sewerage Plant Japan 1.1 6.5 Flood control Shing Chu River Dam Taiwan, China 1.6 8 Tidal barrier Naruse River Japan 2.3 42.1
  19. 19. Trelleborg Queensland Rubber (Australia) Satujo (France) htm Bridgestone (Japan) Rubena (Czech) ml Hydroconstruct (Austria) Superior Dam LLC (USA) Qingdao Hua Chen Industrial Technology Co.(China) Indian Rubber Manufacturers Research Association (India) Thane, Maharastra
  20. 20.  Gujarat's first rubber dam to be built over Tapi at Rundh. 8, 2010, 10.40pm IST  Expert team inspects site for rubber dam in Pampa River. 2007.   Source: The times of India, Surat. Jun Source: The Hindu Kerala.July 28, First rubber dam in India is being built in Andhra Pradesh, over the Janjhavathi river in Vizianagaram district. SEVERAL STATES including Jharkhand and West Bengal, have shown interest in rubber dams. Jharkhand Water Resources Department officials said that they have approached Hydroconstruct to build a dam. Source: August 28, 2010, Issue 34 Volume 7.    Installation and evaluation of Rubber Dams at various watersheds at Bhubaneshwar, Orissa. The steel industrial kerala limited a public sector company, has entered into an agreement with an australian firm(hydro construct) for the construction of rubber dams in kerala. Source: The times of India, Thiruvananthapuram. Mar 3, 2002, 11.40pm IST Many more……
  21. 21. A flexible way to manage water? Hi-tech rubber dams could be the answer.
  22. 22.     •  P. Roy Choudhury, S. K. Chakraborty, Manasi Nath, “Rubber Dam a novel approach for control of water flow in watershed management for agricultural growth of India” published in Rubber India, vol LX, No 8, pg 49, August 2008 Bridgestone Corporation. 1997. Rubber dam: inflatable rubber weir. Tokyo, Japan. P. Roy Choudhury, Manasi Nath, Bhagabat Bhuyan “ Design and Development of Rubber Dam – a farmer friendly Rubber reservoir”, published in Rubber Chem Review, vol XXXVII No 6, pg 29, July- August 2008. X Q Zhang, P W.M Tam, W Zheng ,Construction, operation and maintenance of rubber dams , Canadian Journal of Civil Engineering Volume 29, Number 3, June 2002. Karl-Heinz John, Michael Tiegelkamp, IEC 61131-3:Programming Industrial Automation Systems, Springer.
  23. 23. Thank You