The International Society for Trenchless Technology

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Total: 12 results found.

1. Intersect Method
... measure its position relative to the electromagnetic signal. The rig with the magnetic source tool advances toward the other rig until it intersects the bore and continues through the bore to the other ...
... to drill a pilot bore along a planned path to an exit pit where either the product pipe, reamer or product pipe reamer is attached and pulled back through the bore hole. The process can be relatively simple ...
3. Slip Lining
... the most difficult part of a slip lining job. Grouts that serve only as a filler to restrain the new pipe are relatively low strength grouts with low viscosities. Structural grouts that serve to link liner ...
4. Close-Fit Slip Lining
... application for the rehabilitation of pressure pipes that are relatively straight or have only modest bends, and that have largely maintained their circular profile.   Close-fit slip-lining ...
5. Auger Boring
Auger boring is generally used to install steel casing pipe in relatively soft stable ground conditions such as clay or soils with contained cobbles located above the water table. The auger boring process ...
6. Pipe Ramming
... the soil in the casing minimizes the potential for surface settlement, which allows the casing to be installed at relatively shallow depths and in difficult soil conditions including flowing sands, gravel, ...
7. Cement mortar Liner
... mortar provides two benefits. First and foremost, cement mortar linings are highly alkaline and protect the host pipe against metallic corrosion. In addition, the relatively smooth internal surface of ...
8. Localized Sealing
... repair of relatively small diameter pipes to man-entry pipes. Man-entry joint seals are typically positioned and installed manually. Seals used to repair smaller pipes are positioned at the damaged joint ...
9. 2014 ISTT No-Dig Award Winners
(Uncategorised Content)
... to install a pre-bent the 48” pipe into a hole with a design radius equal to the pre bent pipe. A maxi rig could not be used to make the initial bore due to the very soft soil conditions and the relatively ...
10. 2015 ISTT No-Dig Award Winners
(Uncategorised Content)
... had to be relatively lightweight and yet capable of standing the buckling loads during gravity operations and 2 bar working pressure loads during pressure operations; (2) the logistical complexities of ...
11. The History of the ISTT
(Uncategorised Content)
... methods were still in relative obscurity as a viable option to the underground infrastructure community. Over the years, the ISTT has been instrumental in educating and promoting the benefits of trnchless ...
12. 2017 ISTT No-Dig Award Winners
(Uncategorised Content)
... can handle a maximum cutting size of up to 1 ½” and therefore allows relatively large cuttings compared to conventional HDD.             ...

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