ᐅ Cost of Soldier Pile Wall (or Secant Pile Wall)

Hello everyone,

Due to the ongoing bad weather, I am currently considering reinforcing my excavation pit partly with a soldier pile and lagging retaining wall. This would allow construction to start soon despite the wet/slippery soil conditions. The wall would be about 3.5 meters (11.5 feet) high and approximately 30 meters (98.5 feet) long, arranged in a U-shape.
The soil up to 1 meter (3.3 feet) deep consists of soft glacial till, with stiff to firm glacial till below that.

Does anyone have experience with the approximate costs for such a solution? Estimates from those involved (contractor, geologist, architect, etc.) vary widely, ranging from around 5,000 euros to at least 30,000 euros.

Best regards,
Michael

Berlin steel sheet pile wall: 3.50 m (11.5 ft) x 30 m (98 ft) x €220–245/m² (per square meter) x VAT 1.19 = approximately €27,500 to approximately €30,500