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- Q1137413 subject Q8360137.
- Q1137413 abstract "Inflatable rubber dams are cylindrical rubber fabrics placed across channels, streams and weir or dam crests to raise the upstream water level when inflated. The membrane is a multi-layer fabric made of synthetic fibre (usually nylon) and rubberised on one or both sides. The fabric is quite flexible and yet exhibits good wear-resistance characteristics. A layer of stainless steel mesh or ceramic chips can be embedded in the surface layer to reduce or prevent vandal damage.The inflatable flexible membrane dams (IFMD, or rubber dams) were developed in the early 1950s - Flexidam - Imbertson. They are installed in stream and river beds, generally being bolted into a concrete foundation. They are used to divert water for irrigation, temporarily raising existing dams, flood control, water retention for aquifer recharge, reducing or preventing salt water intrusion into fresh water areas, protect low-lying coastal areas from tidal flooding, enabling fish passage past diversion works, by deflation, and for sewage retention/separation during flood events.Inflatable dams can be filled with water, air or both. They are low pressure - typically 4 to 10 psi. The present trend suggests an increased use of air-filled membranes because they can be deflated or inflated more rapidly, and they are little affected by freezing conditions. Characteristic dimensions cover typically lengths of about 100 m with specially-made membranes up to 200-m wide, dam heights usually less than 5-m but some special designs might be up to 10-m high. The membrane is usually deflated for large overflows. It is however common practice to allow small spillages over the inflated dam. During overflows greater than 20% over-topping, vibrations might result from fluid-structure interactions, and the instabilities might damage or destroy the rubber membrane. Several failures were experienced (e.g. CHANSON 1996). In practice, a deflector (i.e. fin) is installed on the downstream face of the rubber dam to project the nappe away from the membrane, hence preventing rubber membrane vibrations.There are more than 2000 inflatable rubber dams around the world. Durability can be excellent: recently, a 35-year-old dam in eastern Ontario, Canada was replaced, and while still functional in both freezing winter conditions when it was air filled, and water filled in summer, it was deemed to have served its useful life, and was replaced.".
- Q1137413 wikiPageExternalLink view.php?pid=UQ:9257.
- Q1137413 wikiPageExternalLink UQ:9331.
- Q1137413 wikiPageExternalLink www.huachenrubber.com.
- Q1137413 wikiPageExternalLink www.rubberdam.cn.
- Q1137413 wikiPageWikiLink Q1066997.
- Q1137413 wikiPageWikiLink Q11453.
- Q1137413 wikiPageWikiLink Q1180828.
- Q1137413 wikiPageWikiLink Q1187059.
- Q1137413 wikiPageWikiLink Q1187968.
- Q1137413 wikiPageWikiLink Q12323.
- Q1137413 wikiPageWikiLink Q15452092.
- Q1137413 wikiPageWikiLink Q17.
- Q1137413 wikiPageWikiLink Q1739879.
- Q1137413 wikiPageWikiLink Q177941.
- Q1137413 wikiPageWikiLink Q179433.
- Q1137413 wikiPageWikiLink Q2002254.
- Q1137413 wikiPageWikiLink Q2145217.
- Q1137413 wikiPageWikiLink Q231763.
- Q1137413 wikiPageWikiLink Q2670986.
- Q1137413 wikiPageWikiLink Q27538.
- Q1137413 wikiPageWikiLink Q2867077.
- Q1137413 wikiPageWikiLink Q4271952.
- Q1137413 wikiPageWikiLink Q46.
- Q1137413 wikiPageWikiLink Q4679868.
- Q1137413 wikiPageWikiLink Q55.
- Q1137413 wikiPageWikiLink Q6965114.
- Q1137413 wikiPageWikiLink Q7496568.
- Q1137413 wikiPageWikiLink Q8360137.
- Q1137413 comment "Inflatable rubber dams are cylindrical rubber fabrics placed across channels, streams and weir or dam crests to raise the upstream water level when inflated. The membrane is a multi-layer fabric made of synthetic fibre (usually nylon) and rubberised on one or both sides. The fabric is quite flexible and yet exhibits good wear-resistance characteristics.".
- Q1137413 label "Inflatable rubber dam".