Implenia Spezialtiefbau (Bilfinger heritage 2 Mar 2015) + BAUER Schweiz + Marti Tunnelbau + Frutiger Spezialtiefbau + WALO TerrBohr + Eberhard, BAUER Hirslanden Aarau MIP Jan-Feb 2024, SIA 267 Geotechnik.
Swiss Spezialtiefbau / foundations specialty workforce against Implenia Specialty Foundations (Implenia Spezialtiefbau GmbH; wholly-owned segment of Implenia AG SIX IMPN; acquired from Bilfinger SE on 2 March 2015 — Bilfinger heritage ~130 years; not Bachy-rooted), BAUER Spezialtiefbau Schweiz AG (subsidiary of BAUER Group / BAUER AG — Frankfurt B5A.DE post-2024 delisted; Swiss entity in Baden-Dättwil since 2004; full Spezialtiefbau service — bored piles + slurry walls + diaphragm walls + soil mixing + rock anchors), Marti Tunnelbau AG / Marti Spezialtiefbau (Marti Holding AG private Moosseedorf; foundations + tunnelling integrated capability), Frutiger AG Spezialtiefbau (private Thun; dedicated Spezialtiefbau division — drilling + soil stabilisation + deep groundwork), WALO Bertschinger AG (private 4th/5th-generation family group Dietikon HQ; WALO Spezialtiefbau TerrBohr division in Würenlos; ~2,400 employees globally; EFFC member), and Eberhard Bau AG / Eberhard Group (private holding Kloten ~560 employees; civil engineering + excavation + recycling) — Hirslanden Klinik Aarau extension Mixed-in-Place MIP wall (BAUER Spezialtiefbau Schweiz; counterparty Hirslanden AG; 550 mm thick 17 m deep MIP wall with HEB/double-UPE beams; works January-February 2024 completed on schedule) + Zukunft Bahnhof Bern RBS PostParc micropile retrofit (RBS/SBB counterparty; 36 lateral micropiles per support across four supports; two new transfer beams to protect PostParc building during cavern excavation; Frutiger AG + Marti AG main contractors) + Brüttener Tunnel deep excavation pit (SBB counterparty; Eberhard Bau AG + Marti AG Zurich JV; ~26 m deep construction pit at Bassersdorf access shaft) + Sisikon Tunnel access works specialty-foundations component (within Implenia/Frutiger JV CHF 430 m+ scope). SIA 267 Geotechnik (2013) with corrigenda SIA 267/1-C1:2024 + SIA 267 Register Edition 2026-03 effective 1 April 2026 + EntsG / Voranmeldepflicht 8-day + Solidarhaftung Art. 5 + LMV Bauhauptgewerbe 2026-2031 in force 1 December 2025 + SUVA UVG 2024 max CHF 148,200 + BauAV.
Request Technical BriefingRegulator exposure profile
- SIA 267 + 267/1-C1:202428%
- EntsG + Voranmeldepflicht 8d26%
- LMV Bauhauptgewerbe + ISAB24%
- SUVA UVG + BauAV22%
Implenia + BAUER Schweiz cert architecture per worker.
Swiss foundation-specialty cert convergence against Implenia Spezialtiefbau (Bilfinger heritage 2015) / BAUER Schweiz (Baden-Dättwil 2004) / Marti Tunnelbau / Frutiger Spezialtiefbau / WALO TerrBohr × SIA 267 + EntsG + Voranmeldepflicht + LMV Bauhauptgewerbe.
Tunnelling + diaphragm-wall side
Implenia Spezialtiefbau + BAUER Schweiz
- SIA 267 Geotechnik (2013) Eurocode-7-aligned
- SIA 267/1-C1:2024 corrigenda Anchor testing rules
- BAUER MIP + slurry walls Baden-Dättwil since 2004
Drilling + ground-improvement side
Marti Tunnelbau + Frutiger + WALO
- EntsG Voranmeldepflicht 8d SECO entsendung.admin.ch
- LMV Bauhauptgewerbe 2026-31 In force 1 Dec 2025
- ISAB GAV-Bescheinigung Solidarhaftung relief
Boundary specialty worker
Pre-cleared on SIA 267 + 8-day Voranmeldepflicht + LMV
Named projects in this jurisdiction
- Hirslanden Klinik Aarau extension Mixed-in-Place MIP wall (BAUER Spezialtiefbau Schweiz; counterparty Hirslanden AG; 550 mm thick 17 m deep MIP wall with HEB/double-UPE beams; works January-February 2024 completed on schedule) BAUER Spezialtiefbau Schweiz / Hirslanden AG 2024
- Zukunft Bahnhof Bern RBS PostParc micropile retrofit (RBS/SBB counterparty; 36 lateral micropiles per support across four supports; two new transfer beams to protect PostParc building during cavern excavation; Frutiger AG + Marti AG main contractors) RBS/SBB / Frutiger + Marti
- Brüttener Tunnel deep excavation pit (SBB counterparty; Eberhard Bau AG + Marti AG Zurich JV; ~26 m deep construction pit at Bassersdorf access shaft) + Sisikon Tunnel access works specialty-foundations component within Implenia/Frutiger JV CHF 430 m+ scope SBB / Eberhard + Marti + Implenia + Frutiger
- Implenia Specialty Foundations (Implenia AG SIX IMPN — acquired from Bilfinger SE 2 March 2015) + BAUER Spezialtiefbau Schweiz AG (BAUER Group; Baden-Dättwil since 2004) + Marti Tunnelbau AG (Marti Holding private Moosseedorf) + Frutiger AG Spezialtiefbau (private Thun) + WALO Bertschinger AG (private Dietikon; ~2,400 employees globally; EFFC member) + Eberhard Bau AG (private Kloten) Implenia + BAUER Schweiz + Marti + Frutiger + WALO + Eberhard
Swiss Spezialtiefbau: Implenia Specialty Foundations (Bilfinger heritage 2015; not Bachy-rooted), BAUER Schweiz (Baden-Dättwil 2004), Marti Tunnelbau, Frutiger Spezialtiefbau, WALO TerrBohr, Eberhard. BAUER Hirslanden Aarau MIP wall Jan-Feb 2024 + Zukunft Bahnhof Bern + Brüttener pit ~26 m + Sisikon access. SIA 267 + EntsG 8-day + LMV govern.
01. Pre-pricing — LMV Bauhauptgewerbe 2026-2031
LMV Bauhauptgewerbe 2026-2031 wage floor per worker. Annual CPI indexation 0-2%. AVE allgemeinverbindlich extends to posted-worker employers.
02. A1 + 8-day Voranmeldepflicht + SIA 267 familiarisation
A1 portable document per posted worker. 8-day Voranmeldepflicht via entsendung.admin.ch. SIA 267 + 267/1-C1:2024 corrigenda familiarisation per piling-rig operator.
03. SECO + TPK + ISAB onboarding
SECO administration. TPK cantonal oversight where no PK constituted. ISAB GAV-Bescheinigung as Solidarhaftung due-diligence relief.
04. SECO + SUVA-defensible evidence pack
Minimum pack: Switzerland-bank-traceable remuneration, German/French/Italian-language contract, A1 receipt, Voranmeldepflicht receipt (8d ahead), LMV reconciliation, ISAB GAV-Bescheinigung, SUVA UVG insurance, SIA 267 competency per worker.
05. India and Gulf sourcing corridors — the Switzerland foundations pathway
Indian Larsen & Toubro Heavy Civil + Gulf Saudi Binladin / Six Construct deep-foundation pools route through EntsG + 8-day Voranmeldepflicht + LMV + SIA 267 audit-grade chain-of-custody against Implenia Specialty Foundations, BAUER Schweiz, Marti Tunnelbau, Frutiger Spezialtiefbau, WALO TerrBohr, or Eberhard scopes.