The International Society for Trenchless Technology

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1. Drill Bits
(Glossary)
Tools that excavate soil or rock and faciliate steering at the face of the bore. Common types of drill bits used in HDD include slant-face bits, slanted-face rock bits, rotary rock bits, and percussive ...
2. Drilling Fluid
(Glossary)
Largely comprised of water, drilling fluids usually include bentonite and if warranted other additives such as soda ash, polymers, and detergents to address water and soils properties that could compromise ...
3. Jacking Shaft
(Glossary)
An excavation from which trenchless technology equipment is launched for the installation or removal of a pipeline, conduit, or cable. May include a thrust wall to spread reaction loads to the ground. ...
That part of a project, usually before renovation work on a pipeline, that includes preparatory cleaning and internal inspection. ...
5. Pipe Jacking & Microtunneling
(News/Guidelines)
... include a hydraulic jacking system to advance the MTBM and pipe string, a closed loop slurry system to transport the excavated spoils, a slurry cleaning system to remove the spoil from the slurry water, ...
... (4) a tank for mixing and holding drilling fluid; and (5) a pump for circulating the drilling fluid. Other components of an HDD operation include bits, reamers, swivels and pulling heads. Larger ...
7. CIPP Lining
(News/Guidelines)
... gravity or other applied pressure. The resin includes a chemical catalyst or hardener to facilitate curing. The outermost layer of the liner tube is coated with a polymer film to protect the liner during ...
8. Cement mortar Liner
(News/Guidelines)
... of the coating to ensure good adhesion between the liner and the pipe wall. Cleaning techniques include high-pressure water jetting, scraping, pigging, rack-feed boring, and mechanically-driven devices ...
9. Vacuum Excavation Potholing
(News/Guidelines)
... propelled or mounted on trailers. The basic components of a vacuum excavation system include a slurry or debris tank capable of storing spoils until they are discharged off-site; a suction hose and pump ...
10. CCTV
(News/Guidelines)
... systems. The basic CCTV system includes the camera and transport, connecting cables, recording equipment, monitor, and software. The camera begins its survey with the distance counter set at zero corresponding ...
11. Potholing
(News/Guidelines)
... propelled or mounted on trailers. The basic components of a vacuum excavation system include a slurry or debris tank capable of storing spoils until they are discharged off-site; a suction hose and pump ...
12. Potholing for Local Repair
(News/Guidelines)
... propelled or mounted on trailers. The basic components of a vacuum excavation system include a slurry or debris tank capable of storing spoils until they are discharged off-site; a suction hose and pump ...
13. Join ISTT
(Uncategorised Content)
Anyone or any organization that is a member of a national or regional society affiliated with ISTT and who is included in the Affiliated Society’s ISTT membership rolls is automatically a member of ISTT, ...
14. The ISTT Team
(Uncategorised Content)
... engineer in National Expressway Engineering Bureau of Taiwan, then join National Chung-Hsing University as a professor. His specialties include rock mechanics/engineering, trenchless technologies, and ...
15. Programs and Activities
(Uncategorised Content)
... Trenchless Education and Training includes the annual International No-Dig Conference and Exhibition (No-Digs), and subject matter trenchless seminars and courses (Specialized Training Seminars). No-Digs ...
16. Organization
(Uncategorised Content)
... The ESC includes the three Officers of ISTT, i.e., Chairman, Vice Chairman and Immediate Past Chairman, and seven individuals, who are members of ISTT and nominated by their Societies. The ISTT has an ...
... 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 ...
18. Lifetime Service Award
(Uncategorised Content)
... sewer and water utilities to include the gas, and telecommunications industry, as well as other underground utility industries. As Chairman of JSTT, Mr. Matsui diligently promoted the application of new ...
19. 2011 ISTT No-Dig Award Winners
(Uncategorised Content)
... course on the Science of Trenchless Engineering (STE), which is offered to both undergraduate and graduate students. The course structure includes lectures, laboratories, and tutorials on all aspects ...
20. 2015 ISTT No-Dig Award Winners
(Uncategorised Content)
... time to enhance employee job skills without interrupting the job.    Each DICATT module includes comprehensive course assessments in “Test Yourself” sections. A completed assessment is sent to ...
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