TST "Travaux Sans Tranchées"

What TST "Travaux Sans Tranchées" does

TST "Travaux Sans Tranchées" is a French trenchless (no-dig) infrastructure services company specializing in the rehabilitation and installation of underground pipe networks for wet (wastewater, stormwater, potable water, industrial water, pressure pipes) and dry utilities. Founded as a dedicated entity in January 2018 (with operations dating back 17 years per company materials), the firm is headquartered in Châtillon-en-Michaille, Auvergne-Rhône-Alpes, and has since January 1, 2025 operated as a subsidiary of the BUESA INVEST group (previously under FAMY).

The company's core technical offering spans the full trenchless spectrum: UV-cured continuous CIPP lining (chemisage continu aux UV) using certified ALPHALINER 500 G, ALPHALINER 1800, and BB 2.5 glass-fiber (PRV) liners for diameters 150–1800 mm; inversion epoxy lining (65–250 mm); the patented QUICKLOCK point repair system; pipe bursting (éclatement); horizontal directional drilling (forage dirigé); pipe jacking and micro-jacking (fonçage/micro-fonçage, 300–3000 mm); robotic milling (PROKASRO); and IBAK/RICO camera inspection. Quality and safety credentials include NF 390 certification (UV continuous lining, extended through 2026) and MASE certification (since 2022), both prerequisites for French public-sector pipe rehabilitation contracts. Membership in FSTT (France Sans Tranchées Technologie) signals industry positioning in the French trenchless sector.

TST operates a project-based B2B/B2G services model, winning work through public procurement tenders (appels d'offres) and direct commercial engagement with infrastructure owners. The customer base is anchored in two verticals: public infrastructure authorities (municipalities such as Bourg-en-Bresse, Montrevel en Bresse, Chancia, Grilly) and highway/railway operators (AREA for the A43 and A48 motorways; SNCF Réseau for the Cravant-Dracy line). The company markets €15M of revenue for 2024 and serves the Auvergne-Rhône-Alpes and Bourgogne-Franche-Comté regions of France through project crews deployed with specialized equipment, with no disclosed pricing model beyond per-project quotes tailored to scope, diameter, length, and ground conditions.

Name

TST "Travaux Sans Tranchées"

Legal name

Travaux Sans Tranchées

Website

https://tst.fr

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

1–10 employees

Short description

TST "Travaux Sans Tranchées" is a France-based trenchless (no-dig) infrastructure services firm specializing in UV-cured CIPP lining, pipe bursting, directional drilling, jacking, and pipe inspection for French municipalities, highway operators (AREA), and railway infrastructure (SNCF Réseau).

Ownership category

akta.pro rank

Product category

Trenchless Pipe Rehabilitation Services

NAICS

Water and Sewer Line and Related Structures Construction (23711)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Tunnel Construction (Road, Rail, Utility) (IMAFAEAC)

akta.pro secondary industry

Cable Installation & Construction Services (trenching, duct banks, HDD, pulling, cable laying) (EUADADAI)

Keywords

• Trenchless pipe rehabilitation
• No-dig pipe installation
• CIPP lining services
• Underground utility rehabilitation
• Horizontal directional drilling

Headquarters

HQ city

Châtillon-en-Michaille

HQ country

France

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Infrastructure Rehabilitation Services: Project-based service revenue from rehabilitating and installing underground pipe networks using trenchless techniques. Revenue is earned through public procurement contracts and direct engagements with municipalities, highway authorities, and industrial clients. Services include continuous UV lining, point repairs, pipe bursting, directional drilling, and jacking.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

TST provides trenchless (no-dig) installation and rehabilitation services for underground pipe networks, including UV cured-in-place pipe (CIPP) lining, inversion lining, point repair, pipe bursting, horizontal directional drilling, pipe jacking, robotic milling, and camera inspection. Services target wet networks (sewage, stormwater, industrial water, drinking water, pressure pipes) and dry networks for municipal, highway, railway, and industrial clients across France. Revenue is earned through project-based contracts awarded via public procurement and direct commercial engagement.

Product overview

TST "Travaux Sans Tranchées" is an independent company specialized for 17 years in the installation and rehabilitation of underground pipe networks using trenchless technology. The company offers a comprehensive portfolio of core rehabilitation services: UV continuous cured-in-place lining (chemisage continu aux UV), inversion lining (chemisage réversion), point repair sleeves (manchette), horizontal directional drilling (forage dirigé), pipe jacking (fonçage/micro-fonçage), pipe bursting (éclatement), robotic milling (fraisage), and camera inspection (inspection caméra). These services address wet networks (wastewater, stormwater, industrial water, drinking water, pressure pipes) and dry networks. The company utilizes specialized materials including ALPHALINER and BB lining products, and operates inspection equipment from IBAK and RICO. Services are applied to pipelines ranging from 50 mm to 3000 mm diameter across municipal, industrial, and infrastructure applications.

Differentiator

Problem solved

Functional benefit

Products and services

• UV Continuous CIPP Lining (Chemisage continu aux UV) Trenchless rehabilitation technique using PRV (glass-fiber) lining cured with UV light for pipelines 150–1800 mm in diameter, applicable to circular and ovoid shapes, restoring structural integrity comparable to new networks.
• Inversion CIPP Lining (Chemisage réversion) Epoxy resin lining technique for pipelines 65–250 mm in diameter via inversion method, suitable for branch connections, difficult-access networks (manholes under 600 mm), and pipes with bends from 15 to 90 degrees.
• Point Repair (Chemisage ponctuel / Manchette QUICKLOCK) Point repair using the patented QUICKLOCK sleeve system for localized defects such as perforations, infiltrations, cracks, and root intrusions in pipelines 150–1800 mm in diameter.
• Horizontal Directional Drilling (Forage Dirigé) Horizontal directional drilling for soft soils, installing PEHD or cast-iron conduits up to 800 mm in diameter and lengths from 10 to hundreds of metres, ideal for crossings under rivers, roads, and railways.
• Pipe Jacking / Micro-Jacking (Fonçage / Micro-fonçage) Pipe jacking and micro-jacking for hard or plastic soils (silty, sandy, marly, or clayey) using steel tubes 300–3000 mm in diameter; micro-jacking enables rapid installation of PEHD liners or small-diameter pipes over short distances up to 15 m.
• Pipe Bursting (Éclatement) Pipe bursting technique for replacing old pipelines (PE, PVC, cast iron, asbestos-cement, concrete, steel) with new PEHD or coated cast iron pipes up to DN 250 mm (or larger depending on configuration).
• Robotic Milling (Fraisage) Robotic milling service using PROKASRO equipment for pipelines 150–800 mm in diameter, removing roots, protruding connections, and deposits, and reopening connections after rehabilitation; includes before/after inspection reports.
• Camera Inspection (Inspection caméra) Camera inspection services using IBAK and RICO systems installed in 3.5-tonne vehicles, capable of diagnostics and work monitoring in pipelines 50–1000 mm in diameter, equipped with 300 m of cable and autonomous battery operation.

Quantifiable outcome

• ~50-year durability for rehabilitated pipes, comparable to new traditional pipe networks
• +4 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Four partnerships are on record, tiered core and minor.

• FSTT (France Sans Tranchées Technologie)coreStrategic or Co-development PartnerTST is a member of the FSTT association, which promotes trenchless (no-dig) technologies for the installation and rehabilitation of underground pipe networks. Membership signals industry leadership and supports knowledge sharing, standards development, and market education for trenchless techniques in France.
• BUESA INVEST (Groupe FAMY)coreStrategic or Co-development PartnerSince 1 January 2025, TST has been a subsidiary of the BUESA INVEST group (previously known as the FAMY group). The FAMY group has operated the rehabilitation sector via TST since 1 January 2018, and the group relationship provides corporate backing and cross-group synergies across pipe rehabilitation and related services.
• FAMY (via FAMY Frébuans agency)minorStrategic or Co-development PartnerTST partnered with the FAMY Frébuans agency to deliver the Vault de Lugny (89) project involving tubage and lining works on the SNCF Cravant-Dracy railway line. The partnership combined TST's trenchless expertise with the local FAMY agency's regional presence.
• QUADRICminorImplementation/ SI/ Consulting PartnerQUADRIC acted as the maîtrise d'œuvre (client's engineering representative) for the A48 motorway project, selecting TST for the trenchless rehabilitation of metallic pipes under the A48 using ALPHALINER 1800 PRV liner. QUADRIC's specification of trenchless methodology was critical to securing the project.

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• Suez Eau France: Large incumbent water and wastewater operator with extensive French network assets and in-house trenchless rehabilitation capabilities; competes for and absorbs significant municipal pipe-renewal work.
• Veolia Eau France: Dominant French water utility with substantial pipeline infrastructure and trenchless rehabilitation services; a major broader incumbent shaping competitive dynamics for smaller specialists.
• Saier (Norvia Group / SAUR): Major French water and sanitation network operator that internally performs and procures pipeline rehabilitation including CIPP lining; a broader incumbent buyer/competitor in TST's core market.

Direct peers

• NGE Fondations: French mid-tier civil works group with active trenchless and underground utilities capability, competing on French municipal and infrastructure rehabilitation tenders similar to TST's target scope.
• Sekisui SPR Europe: European subsidiary of Sekisui Chemical offering spiral-wound and CIPP pipe-rehabilitation technologies; competes with TST in trenchless sewer and stormwater renewal.
• Brandenburger Liner (Brandenburger Group): European CIPP liner manufacturer and installer offering UV-cured glass-fiber liner systems comparable to ALPHALINER; competes for the same UV-lining contracts TST targets.
• RelineEurope: Specialist provider of UV-cured GRP CIPP systems for sewer rehabilitation with European installer network; directly competes with TST in CIPP UV-lining tenders.
• Bessac (Soletanche Bachy / VINCI Construction): French microtunneling and trenchless specialist (subsidiary of VINCI) offering jacking, HDD and pipe-jacking services for utility networks under roads, rail and rivers — closely overlapping TST's forage dirigé and fonçage offerings.
• SADE (Suez Group): French specialist contractor for water, sewer and underground networks, including CIPP lining and trenchless rehabilitation; directly competes with TST for municipal and industrial pipe-renewal tenders across France.

Others

• Saertex: German manufacturer of glass-fiber reinforcement materials used in CIPP liners (including UV-cured systems); an upstream materials supplier/thematic adjacency to TST's ALPHALINER-based services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/FAMY-150272578901755
• LinkedInlinkedin.com/company/tst-travaux-sans-tranch%C3%A9es

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TST "Travaux Sans Tranchées"