Denlok Jacking Pipes

Until recently, city administrators and planners believed that the use of construction techniques involving surface trenching was the only option for the construction and repair of utility services. It was assumed that existing services were in good condition unless there was evidence to the contrary. In reality, gradual deterioration went unnoticed and failures occurred without warning, in many cases requiring an urgent response. Over the last 25 years, it became apparent that little was known about existing utility services. Installation drawings, where they existed, gave little information on pipe capacity or materials used. Furthermore, the condition of the pipe linings was unknown, leakage and infiltration were unmeasured and related health issues were often not addressed.


Denlok Jacking Pipes
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Denlok Jacking Pipes- click here for full details

Installation Options:

The two installation options currently available for access to underground utility services are Open Cut and Trenchless.

For access by open cut there are four stages:-

Excavation of the trench, removal of spoil and temporary support of other services.

  • Laying and jointing the product pipe.

  • Refilling the trench and compacting the selected spoil or filling material.

  • Restoring above ground infrastructure.

All four stages are characterised by the amount of physical work to be undertaken. Typically, 50 times the amount of spoil to be occupied by the product pipe has to be moved once during excavation and again in refilling. Much of the work in all four stages is labour intensive, involving different skills that require coordination between several companies and authorities. A large project can extend over a long period and be very disruptive in social, economic and environmental terms. Access using trenchless techniques also requires surface work, but not on the scale needed for an open cut approach.

Trenchless technology projects require careful consideration of the existing condition of the underground pipes and ground conditions in order to select the most appropriate technique. The technology and approach must be determined and the surface work must be conducted using an existing access or by digging access pits.

 

The determination of the technique, location of the access pits and the route for a new pipe requires an initial survey. This is often viewed as an additional expense in comparison to open cut techniques. However, the cost of the initial survey stage of a trenchless project is usually offset by a shorter time on site.

Trenchless technologies present a number of unique advantages. With new installations, engineers can install pipe in the most favourable stratum, irrespective of depth. For gravity sewers, significant savings can be realised by retaining gravity flow and avoiding pumping stations.

Quality Assurance:

Naylor Drainage manufactures its products under the control of an approved Quality Assurance System complying with the requirements of BS EN9002: 2008. Naylor Drainage Ltd is a Registered Firm of Assessed Capability (BSI Certificate No. FM1420).

Denlok is Third Party Certified by:

BSI Quality Assurance under Licence No 20173.
CE07 in accordance with Directive 93/68/EC.
MPA NRW Germany - Licence No 210001169-01-01
PSB Singapore - Licence No 02235
CPRU Brunei - Licence No STD3/003

Component Specification:

All Denlok pipes and assemblies are manufactured in accordance with

BS EN295-7

â€ËœRequirements for vitrified clay pipes and joints for pipe jackingâ€â„¢.

Denlok pipes and joint assemblies are manufactured in accordance with BS EN12889: 2000

â€ËœTrenchless construction and testing of drains and sewersâ€â„¢.

CE Conformity:

Naylor Drainage Vitrified Clay Pipe conforms to European Standard: EN 295-10.

Major advantages of Denlok Vitrified Clay Jacking Pipes are:

  • Denlok is covered by and fully certified to EN295, the international standard for clay jacking pipes.

  • High-axial strength for jacking force assurance.

  • High crushing strength for load bearing capabilities.

  • Smooth wall surface with very minimal frictional resistance.

  • Excellent chemical resistance, Denlok handles domestic, industrial and chemical effluents.

  • Accurately machined pipe ends for easy load transference of jacking force.

  • EPDM elastomer sealing components and particle board thrust rings factory fitted. Particle board

  • components tested as best material for load transference.

  • Wide range of diameters available.

  • Worldwide international project-supply references.

  • International Technical and Commercial support.

  • Accurately machined pipe ends for easy load transference of jacking force.

  • EPDM elastomer sealing components and particle board thrust rings factory fitted. Particle board components tested as best material for load transference.

  • Wide range of diameters available.

  • Worldwide international project-supply references.

  • International Technical and Commercial support.


N.B. The information contained in this entry is provided by the above supplier, and does not necessarily reflect the views and opinions of the publisher