Tenders Are Invited For Underground Work Other Than Tunnels, Shafts And Subways – Dreispitzpassage, Claire-Waldoff-Str. 1/3/5, Reinhardstrasse 2, Friedrichstrasse 130 A/B/C In 10117 Berlin, Service: Special Civil Engineering / Jet Blasting Work, Voek 647-25

Underground Work Other Than Tunnels, Shafts And Subways – Dreispitzpassage, Claire-Waldoff-Str. 1/3/5, Reinhardstrasse 2, Friedrichstrasse 130 A/B/C In 10117 Berlin, Service: Special Civil Engineering / Jet Blasting Work, Voek 647-25. As Part Of The Static Upgrade Of The Existing Building, The Existing Foundations Must Be Reinforced Using Jet Blasting. The Work Will Take Place In Sections N (Underground Car Park, Levels 1 And 2) And T (Inner Courtyard). It Is Generally Possible To Set Up The Jet Blasting Devices In The Area Of ​​Component T Because The Ceiling Above This Component Was Previously Demolished. However, In Order To Carry Out The Jet Blasting Work, Core Drilling Is Required In Advance In The Base Plate Of Component T In Order To Be Able To Insert The Drill Pipe Into The Subsurface. There Are Additional Restrictions In Component N: Due To The Insufficient Room Height On Level 2, The Devices Cannot Be Positioned There. The Jet Blasting Work Must Therefore Be Carried Out From Level 1, As The Ceiling Above This Component Was Previously Demolished And The Jet Blasting Devices Have Enough Space At The Top. For This Purpose, Core Drillings Must Be Made In Advance In The Ceiling Between Level 2 And Level 1 As Well As In The Floor Slab Of Level 2. Since There Is Groundwater In The Component Areas, Groundwater Leakage Is To Be Expected During The Jet Blasting Work. To Protect The Areas, Suitable Seals Should Be Installed In The Core Drillings In Order To Reliably Prevent The Ingress Of Groundwater. The Total Area Of ​​The Affected Components N And T Is Approx. 2,800 M². Any Waste, Suspension, Etc. Must Be Completely Picked Up, Transported Away And Disposed Of Properly. The Construction Site Can Be Reached Via The Existing Private Road, Which Is Connected To Claire-Waldoff-Strasse And Reinhardtstrasse. Access For The Fire Brigade Must Be Ensured Throughout The Entire Measure. The Work Is Taking Place Within A Triangular Inner-City Apartment Block And Is Surrounded On Two Sides By 7 To 8-Story Buildings. All Supply Lines Running Along The Outer Walls Of The Underground Car Park Must Be Protected And Kept In Operation During The Work, As They Supply The Existing Building. The Adjacent Buildings Will Remain In Use (Apartments Or Office Space) Throughout The Entire Construction Period.