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NASSCO's intent is to research, train and educate members and non-members on rehabilitation of underground utilities using trenchless technology. Ultimately, NASSCO is committed to set the "industry standards for the rehabilitation of underground pipelines, and to assure the continued acceptance and growth of trenchless technologies". [2]
Mechanicsville is a neighborhood of Atlanta, Georgia. It sits just south of downtown Atlanta. The neighborhood is bounded by: I-20 on the north, across which is Castleberry Hill and Downtown Atlanta; the I-75/I-85 Downtown Connector on the east, across which are Summerhill and Peoplestown; the Southern Railway lines on the southwest, across ...
Location by these technical means is necessary because maps often lack the pinpoint precision needed to ensure proper clearance. In older cities, it is especially a problem since maps may be very inaccurate, or may be missing entirely. A few utilities are permanently marked with short posts or bollards, mainly for lines carrying petroleum ...
Pipe bursting is a trenchless method of replacing buried pipelines (such as sewer, water, or natural gas pipes) without the need for a traditional construction trench. "Launching and receiving pits" replace the trench needed by conventional pipe-laying.
Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. Directional boring offers significant ...
Pipe replacement by pipe bursting. Trenchless rehabilitation includes such construction methods as spiral wound lining, sliplining, thermoformed pipe, pipe bursting, shotcrete, gunite, cured-in-place pipe (CIPP), grout-in-place pipe, mechanical spot repair, and other methods for the repair, rehabilitation, or replacement of existing buried pipes and structures without excavation, or at least ...
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(It is possible to insert the liner from a downstream access point, but this is more risky). CIPP is considered a trenchless technology, meaning little to no digging is typically required, for a potentially more cost-effective and less disruptive method than traditional "dig and replace" pipe repair methods. The liner is inserted using water or ...