The Highways Department had two culverts in need of rehabilitation near the Chilliwack Airport. Both cross under the Highway One Freeway and replacing via Open Cut techniques was not a practical solution.
The first culvert to be repaired was located at Upper Prairie Road and the Highway One. The Culvert was only a few metres to the east of the roadway. This Culvert was cleaned and inspected and a repair was decided as opposed to complete Sliplining. The failures were apparent at the bottom 1/3 of the pipe and, with total failure, the top 2/3’s of a culvert can drop and be catastrophic for the Highway.
The decision to use this method allowed for a smaller cofferdam, as full lengths of new culvert pipe were not needed to be lined up and inserted into the existing culvert. The water was diverted using a pump system.
The repair involved welding in place a bed of structural steel rebar and then encase it in concrete. This formed a new “pipe” in the bottom of the existing culvert and was done quickly, and again, with almost no excavation. The lack of excavation around creeks and waterways is very important to preserving a healthy stock of fish, as they need access to the creeks running through the culverts.
The Highways Department had two culverts in need of rehabilitation near the Chilliwack Airport. Both cross under the Highway One Freeway and replacing via Open Cut techniques was not a practical solution. The first culvert to be repaired was located at …See Project
Eagle Creek Culvert in West Vancouver was experiencing severe failure along culvert invert which could potentially cause above ground failure. The project was determined to be high priority due to close proximity residential properties that had been constructed on the …See Project
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
New installation methodologies include HDD & traditional open cutLearn More
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
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
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
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
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
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.