Built to spec
Built to your engineered drawings, survey, and the real site conditions, not a one-size-fits-all approach forced to fit.
Commercial & Heavy-Civil Construction
Secant and Tangent Pile Walls
Harrowgate Group performs secant and tangent pile wall construction directly for developers, infrastructure owners, general contractors, and geotechnical engineers across Toronto, the GTA, and Ontario, with field execution, controls, material handling, and closeout managed by one accountable construction team.
- Licensed, Insured & WSIB-Covered
- 20 Years in Business
Get a Quote
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
Get a Quote
Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
20 Years in Business
Licensed, Insured & WSIB-Covered Completed to code & Ontario requirements Completed on site and built to the drawings Performed & installed on site across Ontario
Why Harrowgate Group
What to expect from secant and tangent pile walls
Made to last
Durable materials and methods chosen for the load, traffic, and environment on site.
Quote-ready
Send specs, drawings, or photos and get a free, no-obligation site visit and estimate with no guesswork.
Code-conscious
Installation and site work completed in accordance with Ontario requirements.
Our Process
How we plan and deliver secant and tangent pile walls
Secant and Tangent Pile Walls is a continuous drilled pile wall made from intersecting secant piles or touching tangent piles to provide stiff excavation support where movement, soil loss, and groundwater control matter. Harrowgate Group performs this work directly on commercial, industrial, and heavy-civil sites in Toronto and the GTA, with controlled field execution and documented handoff.
- 01 Send your inquiry, a few photos or a description of the site.
- 02 We come out, assess the site, take measurements, and confirm the scope.
- 03 We complete the secant and tangent pile walls on site, to the load and finish the job needs.
- 04 We install it, finish to grade, and clean up, one accountable crew, start to finish.
Local Context
A closer look at secant and tangent pile walls
Scope
Understanding secant and tangent pile walls
How we perform secant and tangent pile wall construction
We execute secant and tangent pile wall construction through a verified sequence with clear release points between activities. Existing conditions, isolations, access, temporary stability, material destinations, and required inspections are confirmed before production advances. The supervisor keeps each work face in a safe, known state when the crew changes tasks or encounters a variance.
Our working sequence is to build accurate guide walls, drill primary piles on the set sequence, place the specified low-strength or structural mix, drill secondary reinforced piles while primary material has the required cutability, verify overlap or contact, maintain casing and slurry control, then excavate in lifts and add anchors, walers, or braces at design elevations. The sequence is translated into daily work packs with prerequisites, access routes, inspection points, crew assignments, and the condition required at shift handoff.
We select equipment for the real task and working envelope, including high-torque rotary rigs, segmental casing, casing oscillators, cutting tools, cranes, tremie systems, grout and concrete plants, reinforcement cages, guide-wall forms, survey gear, and spoil handling equipment. Equipment capacity is checked against load, reach, ground bearing, headroom, travel route, material characteristics, and the planned production rate. We stage attachments, consumables, containers, backup pumps, and critical spares before a constrained shift or shutdown begins.
Field control is built around guide-wall geometry, pile centre tolerance, verticality, drilling sequence, primary pile age, overlap, concrete workability, reinforcement placement, concrete volume, groundwater observations, spoil return, and immediate engineer review when obstructions or alignment deviations threaten continuity.
Supervisors record progress and conditions at each shift, compare them with the issued plan, and stop advancement when the next prerequisite is not proven. If hidden construction, changed soil, unknown services, unexpected contamination, or an access conflict appears, we stabilize the area and obtain the required direction before changing the method.
Materials, specs, and Ontario standards
Secant and Tangent Pile Walls must follow the issued project documents and the Ontario requirements applicable to the workplace, hazards, materials, and temporary or permanent works. We track dimensions, capacities, tolerances, test values, and acceptance criteria to their approved source, then collect field records that show what was installed, removed, tested, and shipped.
The principal compliance and specification framework includes O. Reg. 213/91 engineered excavation support requirements, OBC adjacent property and structural provisions, CSA A23.1 concrete requirements, applicable CSA reinforcement provisions, OPSS clauses for public infrastructure, and engineer sealed design and installation criteria. We confirm which provisions apply to the project status and scope instead of mixing requirements from unrelated work types.
We check current issued-for-construction drawings, specifications, addenda, permits, utility information, and owner procedures before procurement or installation. Material certificates, concrete or grout tickets, equipment inspection records, calibration information, waste profiles, and test forms are collected as the work requires. A field change is not buried in a daily report. It is identified, reviewed, and recorded against the approved basis.
Ontario requirements depend on whether the location remains an industrial establishment or has become a construction project, and on the hazards actually present. We apply the project’s designated-substance information, confined-space assessment, demolition or shoring engineering, waste classification, excess-soil rules, and municipal discharge conditions as applicable. We never assume that an owner’s internal permit replaces the governing legal or engineering requirements.
Have drawings for secant and tangent pile walls? Send them over and we will scope it.
Finished On Site
Completed on site and built to last
Clean site work and a tidy finish, coordinated with your engineers, the other trades, and the surrounding site conditions, built to the engineered drawings and the applicable codes.
- Coordinated with the surrounding build
- Durable finishes for real-world wear
- Quote-ready support from scope to completion
FAQ
Secant and Tangent Pile Walls FAQ
What information do you need to quote secant and tangent pile wall construction?
We need the site address, current drawings and reports, approximate quantities, required endpoint, access limits, operating restrictions, known hazards, utility status, target schedule, and required records. A site walk lets us verify equipment access, staging, retained assets, public interfaces, and the conditions that will drive the work plan.
How do you plan secant and tangent pile wall construction around an operating facility?
We divide the work into clearly released areas or systems, confirm isolations before each shift, protect emergency routes and retained services, and schedule disruptive activities inside approved windows. Daily coordination covers access, noise, dust, water, traffic, permits, and handback conditions so operations know exactly what changes and when.
Who provides the engineering and technical acceptance criteria?
The owner’s retained engineer or consultant normally defines design and acceptance requirements where professional input is required. Harrowgate coordinates constructability, field measurements, installation records, testing, and requests for direction. We do not alter an engineered sequence or acceptance value informally. Changes are reviewed and documented before the affected work advances.
How are unexpected site conditions handled?
We stop the affected activity, leave the area stable, record the condition with measurements and photographs, and determine what information is missing. The project team can then assess the impact and issue direction. Work continues in unaffected areas where practical, while the changed method, quantity, or destination is resolved and documented.
How do you control waste, water, and removed materials?
We identify each material stream before removal, keep incompatible or differently classified materials separate, select suitable containers and vehicles, and confirm the receiving destination. Water is captured, tested, treated, or transported as the project requires. Tickets, manifests, weights, and load records are reconciled with the originating work area.
What determines the schedule for secant and tangent pile wall construction?
The schedule depends on quantity, access, shift windows, isolation readiness, engineering hold points, equipment reach, material cure or test times, groundwater or residue conditions, hauling capacity, and receiving hours. We build a production sequence only after those constraints are mapped, then use short look-ahead plans to keep prerequisites ahead of field crews.
What closeout records will the project receive?
Closeout is matched to the specification and may include daily reports, photographs, surveys, inspection forms, test results, concrete or grout tickets, equipment records, waste and recycling tickets, monitoring data, and marked-up drawings. We agree on file names and submission intervals early so records remain useful for progress review and final turnover.
Still have a question about secant and tangent pile walls? Ask our team directly.
Explore
Related Harrowgate services
Caisson Walls, drilled pile support.
Excavation Shoring, complete retention systems.
Tiebacks and Soil Anchors, external wall restraint.
Internal Bracing and Rakers, internal wall restraint.
Our Work
View Our Projects See real projects across Toronto & Ontario
Commercial and heavy-civil construction delivered for developers, contractors, property managers, and municipalities.
Get a quote for secant and tangent pile walls
Send drawings, a site plan, or a description of the scope. Harrowgate Group is licensed, insured, and WSIB-covered.
Licensed, Insured & WSIB-Covered, work managed and documented on every job
Send your project details
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
Secant and Tangent Pile Walls Across the GTA
View all service areas →Harrowgate Group provides secant and tangent pile walls, delivered and installed with quote-ready support across Toronto and surrounding Ontario communities.
