Social impact◼Liabilities◼Negative publicityBLDG 6921Water main break on Pie IX Blvd.(12/08/02)BLDG 6921
6Water main break on Pie IX Blvd.(12/08/02)BLDG 6921Watermain break on Pie IX Blvd.in numbersWater loss : 93 500 000 liters ( 93 500 m3 )Equivalent : 1850 pools (24 ft long)Flow at break : 8 000 litres/sec.Equivalent : to filling a 24 ft pool in 6,25 sec.Equivalent : to simultaneouly opening 150 hydrants22,000 Montrealers affected by loss of water;50,000 Montrealers affected by important loss of water pressure for fire protection;Potable water distribution to population : 1 558 000 litresCity personnel affected by the catastrophy : 450 employees40 houses flooded;102 911calls received (first 8 hours);304 claims against the cityBLDG 6921
7Costs Due to Water Loss and Breaks ( Potential Savings ) HamiltonTorontoOttawaRosemereYear2009200920092005Cost of water ($/m3)1,031,891,260,32Water loss (m3/yr)21,808,75048,000,0003,700,0001,054,270Total cost from water loss$22.6M$90.8M$4,7M$0.3MNumber of breaks27196825133Cost per break$7,500$10,000$7,500$5,000Total costs from breaks$2.0M$9.7M$1.9M$0.2MTotal cost due to water loss and breaks$24.6M$100.5M $6.5M $0.5M CERIU paper - No Dig 2010, Chicago, ILBLDG 6921➢Need to solve hydraulic & or structural problem;➢Need to prolong life of water main;➢Presence of service connections;➢Pipe located in built up urban environment or environmentally sensitive area;➢Newly paved road;➢Require rapid trenchless installation;➢Need to minimize social costs;➢$ savings.What are the Drivers for Trenchless Renewal ?BLDG 6921
8➢Save construction time;➢No need to displace utilities;➢No need to cut down mature trees;➢Preserve life of pavement;➢Continued access to homes, businesses and traffic;➢Provide safe environment;➢Save $.Motivating factors?BLDG 692116What We Are All Trying to AvoidBLDG 6921
9BLDG 6921BLDG 6921
10Liner Classification (AWWA M 28 Manual)Class I LiningsNon StructuralCML, epoxy liningClass II Linings*Interactive & Semi StructuralLinings, sliplining, modified slipliningClass III Linings*Interactive & Semi StructuralLinings, sliplining, modified sliplining,CIPPClass IV LiningsFully Structural or Structurally IndependentCIPP, sliplining, HDD, PB* All loads transferred to host pipeBLDG 6921 CC 21812. Water Main Rehabilitation Technologies and OptionsNon Structural◼In Situ Spray on LiningStructural◼Cured-in-Place Pipe◼Sliplining (will not be presented)◼Sleeves (will not be presented)New Installations◼Pipe Bursting (will not be presented)◼HDD (will not be presented)◼Tunneling techniques (will not be presented)Stabilisation▪Passive and Cathodic (will not be presented)BLDG 6921
11Potable Water Systems:•Distribution systems•150 –300 mm dia•Small diameter services present•CIPP - technology of choice•Transmission systems•> 350 mm dia•No services•Technologies available: •CIPP•Sliplining•Pipe bursting•HDDBLDG 6921Options•Trenchless rehabilitation•Structural CIPP;•Proven technology.
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- Summer '19