Trenchless Technology

NOV 2018

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W W W.T R E N C H L E S S T EC H N O LO GY.C O M 27 N O R T H A M E R I C A N M I C R O T U N N E L I N G 2 0 1 8 R E V I E W swing , separately acquiring Caldwell Marine International , Huxted Tunnel - ing , and ECI International by 2014. Northeast Remsco has been a lead- er in microtunneling for many years, and completed a landmark project in 2010 – the first planned, curved mi- crotunnel in the United States. As part of the Homestead Avenue Interceptor Extension in Hartford, Connecticut, Northeast Remsco proposed extending the final 310 lf microtunnel an addi- tional 290 lf and incorporating a curve to accommodate a planned 4-degree horizontal deflection. This eliminated the need to construct an intermediate shaft, resulting in time and cost saving. " The principal challenge [at that time] was to overcome the liability concerns associated with curved mi- crotunneling ," said Richard Palm- er, trenchless division manager for Northeast Remsco. " U.S. engineering firms were reluctant to design a proj- ect that required the use of a 'never been done in the U.S.' microtunneling technique. Fortunately, the designer engineer and the owner were receptive to the idea and collaborated on the fi- nal version of that curved microtun- nel . It is interesting to note that the change order authorizing the curved microtunnel included language that shifted all of the risk to the contrac- tor; shedding the risk was paramount to breaking down the barrier." Northeast Remsco is a founding member of the North American Mi- crotunneling Association (NAMA), with Palmer serving on the executive board. NAMA played a role in guid- ing revisions to the recently updated "Standard Design and Construction Guidelines for Microtunneling " pub - lished by ASCE, as well as implement- ing new guidelines in the AREMA standards confirming how microtun- neling can be used successfully on railroad properties across the country. The company continues to set the bar higher for its microtunneling proj- ects. In 2017, the firm broke records for its longest drive as part of the three Broad Creek WWPS Augmenta- tion Projects near Washington, D.C . In fact , Northeast Remsco set the mark three separate times during the course of the projects, with the longest being 1,560 ft of 66-in. casing . "Long drive lengths create a new set of challenges," said Northeast Remsco proj- ect manager Pete Sudkamp. " You need to consider 24-hour-a-day operations to keep the pipe string moving , and you have to manage your jacking loads, in- cluding proper lubrication techniques and the use of interjack stations." LO O K I N G B AC K Despite the advancements, Acosta re- members the early days of the company as he continues forward. " You don't forget that early stuff. I did my home- work on Carmine's plan table. I loved that it had the overhead light and there was an electric eraser. The vendors we still work with today, back then they were walking into the house while I

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