Maple Ridge River Road Spring 2019

This was the final part of the contract that was started in 2017 with 5 of 8 Sections completed by PW Trenchless starting in 2015. This project was also the first time PW Trenchless had tried to replace a 200mm pipe with 450mm pipe, an upsize of 2.5 Times the flow for the pipe. This was certainly in the experimental stages for this type of upsizing and the pipe was fairly new PVC which although still having many serviceable years left, the increase of population density was overwhelming the pipe.

A special cutter was used to split the PVC pipe to aid the burst. A bentonite lubricant was also used to lessen the friction of the ground surrounding the pipe and was pumped into the interior of the new HDPE pipe and inserted into the void right behind the bursting head. The head was also comprised of three piece including two various sizes to compress the surrounding material as well as the cutter.

The first sections were burst through Kanaka Creek park and PW Trenchless was very concerned with environmental conditions including high water levels and the presence of the public visiting the park. The park was not closed at any time due to the work performed by PW Trenchless.
 

Recent Pipebursting Projects

Maple Ridge Sewer Replacement

In early 2017, The City of Maple Ridge put out to tender a contract for an "Experimental" pipe burst in an environmentally sensitive area of Maple Ridge and through part of Kanaka Creek Park. The host pipe was 375mm (15 …

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Pemberton Street North Vancouver

The District of North Vancouver had a 900mm CSP storm sewer that had been failing for 10 years. Numerous efforts to clean the pipe had resulted in the bedding, surrounding the pipe, migrating into the pipe when cleaning efforts were …

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New Westminster 2015 Sewer Rehabilitation Program – Pipe Bursting

A prime example of the less invasive nature of trenchless construction in action. Intricate work zones accurately positioned throughout densely tree-lined streets allowed for the replacement of deteriorating sewers. Up-sized to exceed current capacity requirements, providing results long into the …

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Design - Build

An alternate tendering process where the contract is awarded to one entity which comprises both engineering and contracting.

Because PW Trenchless Construction offers such innovative solutions for underground utilities, it is often beneficial for the owner to request solutions based on a performance specification. This allows PW Trenchess to offer unique solutions while working with equally innovative engineering companies. Learn more about design - build here!

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New Installation

New installation methodologies include HDD & traditional open cut Learn more about new installation here!

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Pipe Replacement & Rehabilitation

In this day & age of pipe systems reaching the end of their projected lifespan, pipe replacement and pipe rehabilitation have become major fields of engineering.

PW Trenchless Construction provides viable options such as pipe bursting, loose fit lining and internal pipe re-construction whether partial & fully circumferential. Learn more about pipe replacement & rehabilitation here!

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Culvert Rehabilitation

The aging culverts under roads and highways in many case have reached the end of their engineered life-span. We consider the rehabilitation or replacement of these culverts to be vital to our built environment.

PW Trenchless has been a pioneer in working with MOTH, railway companies and municipalities in developing rehabilitation methodologies for the hundreds of thousands of culverts that currently exist in BC. We have offered solutions in both procurement and construction from design-build to sliplining, invert rehabilitation and full circumferential relining. Learn more about culvert rehabilitation here!

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Point Repairs

Often pipe failure can be concentrated to one section, for various reason, leaving the rest of the pipe in good condition. The repair of these localized failures are know as external point repairs (EPR's).

EPR's demonstrate PW's ability to work as both a trenchless and civil contractor, completing EPR contracts using our civil contracting skills and assisting other pure trenchless contractors who only have the capacity to work in an existing pipe. Learn more about point repairs here!

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Pipe Upsizing

Pipe upsizing is the fundamental concept of pipe bursting.

The vast majority of pipes are less than or equal to 200mm in diameter, but with today's densification practices of urban design, there is a major demand to increase current capacity to handle extra flow. Pipe bursting provides the ideal solution to this issue, particularly in an urban setting. Learn more about pipe upsizing here!

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Horizontal Directional Drilling

Horizontal Directional Drilling is a low impact Trenchless construction service where pipe is installed in a shallow arc along a bore path which has been created by a drilling rig. Often the terms Horizontal Directional Drilling (HDD) and Directional Boring are used interchangeably, but in our industry we use the word “boring” when we utilize smaller sized drilling rigs with small diameters for short crossings in the hundreds of feet, and we use the word “drilling” when we utilize larger rigs with large diameters for long crossings in the thousands of feet. Learn more about horizontal directional drilling here!

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Primus Lining

Primus Line® is a flexible sliplining solution for the trenchless rehabilitation of pressure pipes. The system consists of a flexible Kevlar® reinforced liner and specially developed end fittings. Primus Line® is not bonded to the host pipe and is self-supporting. An annulus remains between Primus Line® and the host pipe.

Developed by experienced engineers, the system is suitable for different media as well as various application needs and has already proven itself in numerous projects.Learn more about primus lining here!

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When you join PWT, you become part of a community of people who are engaged in the most innovative practices in the Trenchless Industry. We have been instrumental in setting up a scientific method for cities to gain carbon offsets/credits from their use of trenchless construction. This system has been reviewed by the BC Government and has been approved as of December 2018. We expect to see it in common use shortly.

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