Boring - Trenchless International

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Underground in North America North America is home to a diverse underground infrastructure industry. Here Trenchless International looks at innovative and record breaking projects, using a range of trenchless techniques, as well as providing an overview of NASTT’s No-Dig 2010. In 2010 NASTT turns 20 – congratulations! The Society’s No-Dig Conference and Exhibition, taking place in Chicago 2–7 May, will celebrate the achievements of the Society and the industry in North America. The event also serves the aims of the NASTT to promote the industry through events such as the Educational Fund Auction and the provision of scholarships and awards. Turn to page 26-29 to find out more about the event. Also in this North American feature; • Auger boring records in Kentucky, Ohio and Oregon • Optically guided, downhole hammers used to expand a substation in rural New York State • HDD crossings in New Orleans in the aftermath of Hurricane Katrina • The diversion of wastewater flows in South Carolina with HDD, using Fusible PVC pipe • An engineer’s perspective on the Peace River Intersect Project in Alberta Canada. For all the latest news, projects and technical article visit www.trenchlessinternational.com north america April 2010 - Trenchless International 23
Under Chicago Chicago, the Windy City, is situated on the south western shores of Lake Michigan and is the capital of Illinois. The city, founded in 1833, has depended on the lake for water and sanitation. Here Trenchless International provides an overview of the development of the city’s water and wastewater networks, as well as looking at current projects. Water works North america April 2010 - Trenchless International Bordering on Illinois, Indiana, Michigan, and Wisconsin, Lake Michigan is the only Great Lake to be located entirely within the United States. It is the second largest Great Lake by volume, with a capacity of 1,180 cubic miles of water, and the third largest by area. The City of Chicago utilises Lake Michigan as its source of drinking water. Water is treated via two plants – the Jardine Water Purification Plant serves the northern areas of the City and suburbs, while the South Water Purification Plant serves the southern areas of the City and suburbs. Water is distributed throughout Chicago via century-old pipes that require ongoing maintenance. The City of Chicago commonly uses trenchless techniques such as sliplining and CIPP, together with CCTV inspection and condition assessment to inspect and maintain the system. In addition, the City has implemented the Tunnel and Reservoir Plan (TARP), also known as the Chicago Deep Tunnel, which aims to reduce flooding of the city and prevent raw sewerage from entering Lake Michigan by diverting the flow to holding reservoirs. In the pipeline – a short sewer history The Chicago Sewers Collection has collated a history of the development of the wastewater network. From the establishment of Fort Dearborn in 1803 along the Chicago River to the present day, water and sanitation have always been crucial to Chicago. Chicago’s low-lying location combined with the livestock and waste of the settlers resulted in a serious waste disposal problem. The Collection states that by 1845, Chicago was facing an environmental crisis and then experienced two cholera epidemics. In 1855, the Chicago City Council employed Boston engineer Ellis S Chesbrough to design the first comprehensive system of underground sewers in the United States. The Board of Sewerage Commissioners adopted Mr Chesbrough’s plan to drain sewage into the Chicago River, in order to limit the cost and extent of the proposed sewer system. The level of Chicago’s streets was raised from six to ten feet to accommodate sewer pipes, gas and water mains. Owners lifted buildings to meet the new street level; in some cases whole blocks were raised at a time. By 1930 Chicago’s sewer system was the most extensive in the world. Today the Chicago Department of Water Management continues to employ new technologies in inspection, materials and maintenance. Planning for future Despite the reversal of the Chicago River and the construction of the largest water treatment plant in the world, polluted combined sewer overflows (CSOs) persisted in Chicago throughout the first half of the 20th century. In 1972, in order to improve the Chicago Area Waterway System (CAWS), the TARP was adopted by the Metropolitan Water Reclamation District of Greater Chicago (MWRD). MWRD explained that construction of Phase 1, primarily for pollution control, began in 1975 and was completed in 2006. The total length is 176 kilometres (109.4 miles) of deep, large diameter, rock tunnels providing 2.3 billion gallons of volume to capture CSOs. The tunnels were bored using tunnel boring machines (TBMs), with pipe diameters ranging from 9–33 feet. MWRD says that the TARP tunnelling work led to major improvements to the TBMs, and pushed them beyond their then-proven capabilities. For example the Mainstream tunnel was mined three times faster than the 0.6 metres per hour that had been estimated in 1975. Mining records were set on many of the TARP contracts. On the last tunnel leg completed on the Calumet system (Little Calumet), the TBM crew broke several world records for a machine of its size. In addition to contributing to an increase the speed of mining, the TARP project has led to improvements in accuracy. The TBM used on the Little Calumet leg used a laser target system to permit continuous steering control and monitoring of line and grade – a huge improvement from the machines used on the first tunnels of the TARP, which had to be adjusted at the end of each push. Phase 2 of the TARP is in construction and is expected to be completed by 2019. In late 2009, Governor of Illinois Pat Quinn and Illinois Environmental Protection Agency (EPA) Director Doug Scott announced grants and loans for environmental projects to improve wastewater quality in Illinois, using funds from the American Recovery and Reinvestment Act of 2009 (ARRA). The recovery program was authorised in 2009 by the United States Congress and President Barack Obama. Illinois EPA receives approximately $US180 million for wastewater projects and $US80 million for drinking water projects through ARRA. The same year the Department of Water Management completed a city-wide computer model of its large auxiliary sewers (42 inches in diameter and larger) and CSOs. This dynamic flow model represents the best available information on the hydrologic and hydraulic characteristics of the sewer system. The model will be used as a planning tool to regulate development and investigate the need for future sewer projects. Chicago’s main sewers convey flow to interceptor sewers. These interceptor sewers are owned and operated by the MWRD. The interceptor sewers convey dry weather flow to MWRD’s treatment plants for treatment and release to local waterways. During storm events, flows in excess of the capacity of the interceptor sewers discharge into the MWRD’s TARP system for storage. Dr A S Paintal, a sewer engineer with MWRD spoke with Trenchless International about maintaining Chicago’s sewer network. MWRD is responsible for approximately 550 miles of the sewer network. Pipe diameters range from approximately 18 inches up to 24 feet, with the majority between 5 and 7 feet in diameter. Dr Paintal explains that, as the sewer network was built in the early part of the 20 th century, the engineering department needs to use trenchless techniques such as slip lining and CIPP to maintain the network. Mayor of Chicago Richard Daley says “We are proud of our efforts to renew Chicago’s infrastructure with the installation of new water and sewer mains.” 1803: Establishment of Fort Dearborn, water is taken from the Chicago River and private wells. 1834: By the order of village trustees a village well is dug – the first attempt at a public water supply. 1836: The Illinois State Legislature grants a 70 year charter for incorporating Chicago Hydraulic Company, a private enterprise, to supply water to the City of Chicago. 1842: Construction is completed on Chicago's first water works. The water mains are made of cedar and the water intake is located about 150 feet into Lake Michigan. 1851: The Illinois State Legislature grants the City a charter to build and operate its own water works system. 1854: The water system, consisting of 8 3/4 miles of cast iron pipe and one iron reservoir, is put into operation. The new intake is made of timber and extends 600 feet into Lake Michigan. 1863: The Chesbrough plan is adopted to construct intake cribs and deep tunnels two miles offshore of Lake Michigan to avoid shoreline pollution. 1867: The “Two-Mile” crib and tunnel are successfully put into operation. 1871: The Great Chicago Fire. 1889: Annexation gives the City two new intakes, two new tunnel sections are dug to serve the northern and southern sections of the City. 1900: The flow of the Chicago River is reversed so water is carried away from Lake Michigan. 1901: The Central Park and Springfield pumping stations are built in conjunction with recently completed northwest land and northeast lake tunnel expansion. 1909: The Blue Island tunnel is put into service; Chicago’s first long, concretelined tunnel. 1911: The Edward F Dunne intake crib for Chicago’s southwest side is put into operation to supply the southwest lake and land tunnel. 1912: Chlorination of Chicago’s water begins on the City’s southwest side. 1918: The Wilson Avenue tunnel and Mayfair pumping station are completed. 1922: Construction begins on the largest tunnel to date, in the City of Chicago, to accommodate the Dever intake crib. 1926: Construction begins on the City’s south side for Chicago's first experimental water filtration plant. 1947: Chicago becomes one of the first cities in the nation to utilise modern state-of-the-art filtration technology when the South Water Plant opens. 1964: The James W Jardine Water Purification plant opens. It is the largest purification plant of its kind in the world. North america April 2010 - Trenchless International 24 25
Page 1: In this issue | Colombia | South Af
Page 4 and 5: Issue 7 - April 2010 Great Southern
Page 6 and 7: World wrap New Orleans rebuilding i
Page 8 and 9: Largest CIPP project in Ireland CIP
Page 10 and 11: Colombian Society digs deep ISTT ne
Page 12 and 13: istt news April 2010 - Trenchless I
Page 16 and 17: NASTT celebrates 20 years by Chris
Page 18 and 19: North america April 2010 - Trenchle
Page 20 and 21: A 20-inch steel pipe is elevated by
Page 22 and 23: gas April 2010 - Trenchless Interna
Page 24 and 25: DN150 liner installed and reverted.
Page 26 and 27: projetcs April 2010 - Trenchless In
Page 28 and 29: Pipe cleaning April 2010 - Trenchle
Page 30 and 31: Robotics April 2010 - Trenchless In
Page 32 and 33: Chemically restoring pipeline posit
Page 34 and 35: the international society for trenc
Page 36: Get your hands dirty... Enjoy Austr

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