A large quantity of trench boxes, sheet piles and hydraulic braces from hire specialist Groundforce Shorco has been used to support a 200m-long open trench while a new sewer pipe was installed.rnMain contractor Barhale used 57 trench boxes, with associated handrails, to support the sides of the 1.5m wide, 2m deep trench in poor, made-up ground where the pipe passes through a petrochemical refinery at Harwich in Suffolk.rnThe contractor's task was to install a new 1,000mm diameter polyethylene pipe to replace an existing concrete pipe that had failed and was leakingrntreated effluent into the surrounding ground.
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