Burnaby grew fast after the 1950s, swallowing farmland and steep slopes for subdivisions and towers. That expansion hit a geotechnical wall: glacial till over soft marine clays, with water tables shifting near Burnaby Lake and the Deer Lake basin. We have designed grouting programs here for decades, from seepage cutoffs under Metrotown high-rises to void filling beneath aging infrastructure on the hillsides. Before any injection design we run a permeability test at the site to map flow paths. That data decides whether we use permeation grouting or jet grouting. The local geology does not forgive shortcuts.
Grouting design in Burnaby must account for till boulders that can block injection points and soft clay that can fracture under high pressure.
Service characteristics in Burnaby
- Dual-packer systems for targeted permeation grouting in till lenses.
- High-pressure pumps for jet grouting columns in soft clay zones.
Typical technical challenges in Burnaby
The most common mistake we see in Burnaby is pumping grout at full pressure straight into the upper clay crust. That blows out the formation. You get surface heave and zero penetration into the target zone. We always start with a step-rate injection test on the first hole. That tells us the fracture pressure of that specific layer. For sensitive clays near the Fraser River floodplain we also require real-time monitoring with inclinometers. Without that, a grouting program can destabilize adjacent utilities. Our team has seen it happen twice in Brentwood alone. The fix costs more than the original design.
Our services
We offer two main grouting design services tailored to Burnaby's subsurface conditions. Both include field supervision and post-treatment verification.
Permeation Grouting Design
For granular till lenses and sand seams below the water table. We calculate injection radii using the permeability log, design the hole spacing, and specify the grout mix. Typical application: seepage cutoffs below building excavations in Burnaby's glacial till.
Jet Grouting Design
For soft sensitive clays and organic layers. We design the column diameter, nozzle parameters, and air/water ratios to achieve the target strength. Used to stabilize foundations for mid-rise buildings on Kingsway or to underpin existing structures near the Skytrain alignment.
Frequently asked questions
What is the difference between permeation grouting and jet grouting?
Permeation grouting fills existing voids or pores in granular soil without displacing the soil structure. Jet grouting uses a high-pressure fluid jet to erode and mix soil with cement, creating a new column of treated ground. In Burnaby, permeation works best in clean sands and tills; jet grouting handles soft clays and organic layers.
How much does grouting design cost in Burnaby?
A typical grouting design package for a small to medium project in Burnaby ranges between CA$1.630 and CA$5.540. This includes site visit, permeability testing, mix design, injection layout, and a supervision plan. Larger projects with multiple stages or deep injections cost more.
Do I need a grouting design for a single-family home foundation?
Usually not. Standard spread footings on Burnaby's glacial till do not require grouting. You need it if you are building on fill, soft clay, or organic deposits, or if you need to stop groundwater seepage into a basement excavation.
Can grouting fix settlement in an existing building?
It depends on the cause. If settlement comes from loose granular soil or voids under the foundation, compaction or permeation grouting can lift and stabilize. If the settlement is due to ongoing consolidation of soft clay, grouting alone will not stop it. We always do a settlement analysis first.
What standards apply to grouting design in Burnaby?
We follow CSA Z768 for grouting work and the NBCC 2020 for seismic design. The ASCE Grouting Committee guidelines provide the framework for quality control. Our laboratory holds ISO 17025 accreditation for the related soil and grout testing.