The International Society for Trenchless Technology

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... along a planned bore path. There are many types of bits designed to navigate through different types of soil, from clays and sands to rock. Most drill bits have a slant-face, the orientation of which determines ...
There are currently almost 1500 papers available in the ISTT database. Papers from the International No Dig (2000 - 2017), North American shows  (2001 - 2007) are available in the PDF format. Abstracts ...
3. Joint Grouting
... surrounding the defects. There are a variety of chemical grouts used for grouting of pipe joints and sewer connections. The grout should be compatible with the pipe materials and soil conditions surrounding ...
4. Pipe Extraction
...  There are several systems that have been developed to remove existing service lines while at the same time replacing them with a new pipe. Most all involve pulling out the existing pipe while simultaneously ...
5. Ground Pentrating Radar
There are a wide range of techniques available to locate buried pipes. Most of these systems use electromagnetic waves or signals transmitted into the ground or from underground utilities. These technologies ...
6. Leak Detection
There are a number of methods for surveying and locating leaks in pressurized pipes. Methods vary from simple hand-held acoustic receivers operated above ground to in-pipe, free-swimming leak detectors. ...
7. Localized Sealing
Localized seals are available to repair pipe defects at joints or over short distances along the pipe, and to seal defective connections between mains and laterals. There are two general types of localized ...
(News/News head home)
Why Dig? When there's a better way   The objective of the ISTT is to "Advance the science, practice and application of trenchless technology for the public benefit, worldwide"  ...
9. Why Trenchless? ('No-Dig')
(Uncategorised Content)
... and people suffer. But wait just a second. Look again. Did you notice those covers in the road? If there are access points to the underground networks why not use them? Here is same repair being undertaken ...
... Illustrations should be inserted to the text (one file per entry). Specify the category of the award from below. There is no template but to include all the necessary information (especially for project ...
11. Awards and Recognition
(Uncategorised Content)
... began to form national and regional societies to promote the science and practice of trenchless technology for the public good. Today, there are approximately 30 Trenchless Societies, affiliated with ISTT, ...
12. Disclaimer
(Uncategorised Content)
... any information provided, including any kind of information which is incomplete or incorrect,will therefore be rejected.All offers are not-binding and without obligation. Parts of the pages or the complete ...
13. 2012 ISTT No-Dig Award Winners
(Uncategorised Content)
... for rehabilitating the Jablunkov tunnel. As with any modeling of this complexity, there are issues that require further refinement and research. However, the research results of this study produced ...
14. 2015 ISTT No-Dig Award Winners
(Uncategorised Content)
... the taper of the host pipe and conformed to the two elbows in the middle and end of the inversion. In addition, there was not enough space to open an exit shaft, so the inversion had to stop just short ...
15. Affiliated Societies no
(Uncategorised Content)
... was formed in 1991 and affiliated in 1992. There are 56 members, including 14 Corporate Members. The Association has published a Handbook on trenchless techniques available in Austria and national events ...
16. The History of the ISTT
(Uncategorised Content)
... all around the globe through its its international and regional conferences, seminars and affiliates. Today there are 25 affiliated societies and 3500 members worldwide carrying the trenchless message. ...
17. Strategic Plan to the Year 2010
(Uncategorised Content)
... at the fore-front in trenchless development and promotion activities worldwide". There are a number of issues which make up the major challenges facing the ISTT for the next four years. These ...
18. 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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