Wednesday, November 16, 2005

Trenchless Technology - Tecnología sin Zanjas

Lately it would seem that for some people -specially for the "deregulacionists", the R&D in an industry such as the electrical one begins and finishes with the study of the regulatory theories, which origins certainly are in the development of the railroad in the United States in the middle of the XIXth century. Those who still believe that still " there is life " beyond the " exterior borders of the regulatory world ", and they preserve their curiosity for the exploration of new frontiers of the engineering, will find below a collection of links on " trenchless technology ". For sure there are a lot of pedestrians that would be delighted with the advance of technologies such as this one, more prosaic than regulation, but more practical as well.

Últimamente parecería que para algunos, especialmente para los "deregulacionistas", la I+D+i de un sector industrial como el eléctrico empieza y acaba con el estudio de las teorías regulatorias, cuyos orígenes por cierto están en el desarrollo del ferrocarril en los Estados Unidos a mediados del siglo XIX. Aquellos que aún creen que "hay vida" más allá de los "confines exteriores del mundo regulatorio", y conservan su curiosidad por la exploración de nuevas fronteras de la ingeniería, encontrán abajo una colección de links sobre "tecnología sin zanjas". Seguro que son muchos los peatones que estarían encantados con el avance de ´tecnologías como esta, más prosaicas que la regulación, pero también más prácticas.

Key words
HDD (Horizontal Directional Drill),
Dry directional drilling,
Términos
Tuneladora, tunelera, tunelería guiada, topo, perforación horizontal dirigida,

A REAL CASE OF A POWER UTILITY
Horizontal Directional Drilling Used to Install Electrical Cable
To increase service capacity, National Grid needed to install two 115-KV underground cables through congested portions of Quincy and Dorchester in the greater Boston area. Connecting two electrical substations, (Dewar Street substation in Dorchester to North Quincy substation on Spruce Street in Quincy), the 3-mi-long transmission lines include two 8-in.-diameter pipe-type cables, welded joint steel conduits, and two 4-in.-diameter communication conduits. The transmission lines cross beneath the Neponset River, a 1,200-ft-wide tidal river that separates Dorchester and Quincy, at the mouth of the river where it empties into Boston Harbor. The lines also cross beneath a portion of an Interstate I-93 embankment, an I-93 on-ramp, and twice underneath the Massachusetts Bay Transit Authority's Red Line rail system.
In the planning phase, an extensive geotechnical exploration program was undertaken to assist in evaluating trenchless construction alternatives in an area where cut-and-cover trenching could be problematic. The use of HDD for construction of the cables underneath the river was recommended, because it offered significant benefits. For example, HDD did not require mobilization of any marine equipment; and, therefore, did not impact shipping traffic or sensitive marine life. Also, a lengthy permitting process was avoided. A 1,600-ft-long bore was used at this river crossing with approximately a 26-in.-hole diameter. The cables were bundled and pulled back directly through the bore in one single operation.
HDD was also used to construct a 600-ft-long portion of the alignment that is adjacent to the toe of the 20-ft-high, I-93 highway embankment, and beneath an I-93 on-ramp embankment. A curved horizontal alignment was used for this section. Using HDD for this section eliminated impacts on vehicular traffic on the highway and on-ramp, and avoided the need to pass under a structure owned by an adjacent property owner. These two applications of HDD avoided the need for permitting and right-of-way acquisitions processes, which enabled construction to be completed in significantly less time than would have been required by trenching methods

A REAL PROJECT OF A POWER UTILITY
The Connecticut Light & Power Co. Glenbrock Cables Project

LINKS
CANADA
Une première au Québec : Réhabilitation sans tranchée d’une conduite d’aqueduc de 300 mm

Centre d'expertise et de recherche en infrastructures urbaines

Fiche descriptive RC-02 - Techniques sans tranchée Réhabilitation par chemisage, gaine insérée par tirage

Subsurface Utility Engineers

FRANCE

Comite Francais des Travaux Sans Tranchée

Ville sans Tranchée

Societe Francilienne de Travaux

"Réhabilitation de canalisations dassainissement sans tranchée" echniques d'Ingénieur

Societe des Eaux du Nord
"Travaux Exceptionels de Technique Sans Tranchée Pour le Renovellement d'une Conduite d'Eau Potable Rue de Paris a Lille"

No Trenches in Town/Pour Une Ville Sans Tranchee Proceedings of the International Conference NO-DIG 92 Paris, 1992.

Telerep France

AFG _ Association Française du Gaz
Programme des conférences du salon « Ville sans tranchée 2005 » Junio 2005

Le Magazine de la Ville de Cergy. Avril 2005:
"Sans tranchée" c'est mieux.

Project National RERAU

SPAIN

Asociación Ibérica de Tecnología sin Zanja

Sistemas y tecnologias sin zanja Presentación en Power Point de APLES

UNITED KINGDOM

The Institute for Energy Research and Policy of the Birmingham University
Research on "Trenchless distribution systems"
The fololwing reports can be unloaded from the Trenchless Technology Network of the Birmingham University

  • Underground Mapping, Pipeline Location Technologies and Condition Assessment (March 2002)
  • Research Needs for New Construction Using Trenchless Technologies (August 2003)
  • Renovation Techniques and Materials for Pressure and Non-Pressure Pipes (May 2004)
  • Research Needs for On-line Replacement Techniques (November 2004)

UNITED STATES OF AMERICA

Emerging Construction Technologies

North American Society for Trenchless Technology

Trenchless Information Center

Microtunneling

UndergroundInfo

Internet Links

REVIEWS AND OTHER SOURCES

Trenchless Technology Magazine

Tunnelling and Underground Space Technology Incorporating Trenchless Technology Research

What Lies Beneath—Improving Underground Utility Locating Technologies

"Utility Locating Technologies" Project - Statement of Need

Journal of Cosntructyion Engineers and Management - March/April 2004
Evaluation of an Emerging Market in Subsurface Utility Engineering

North Carolina State University, Construction Automation & Robotics Laboratory The Economic Impact of Underground Utility Damages(1998)

Common Ground Alliance

PPI Handbook of Polyethylene Pipe

TT Technologies "Innovators in Trenchless"

23 th iternational Conference No-Dig (19-21 september 2005)



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