Tenders Are Invited For Site Preparation And Clearance Work – New Building For The Professional Fire Brigade ... in Germany

Work Detail

Site Preparation And Clearance Work – New Building For The Professional Fire Brigade Nord, Darmstadt. An Aerial Photo Evaluation By The Kmrd Hesse Is Available For The Area. There Is A Suspicion Of Explosive Ordnance Caused By Air Attacks (Explosive And Incendiary Bombs) Across The Entire Area. According To The Kmrd, The Horizon Of Suspicion For Dropped Ordnance Extends To A Depth Of 5 M Below Gok. There Is No Evidence Of The Use Of Long-Term Detonators. As Part Of A Preliminary Clearance Measure, A Technical Exploration Was Already Carried Out On Most Of The Area Using A Combination Of Tdem And Ferromagnetics. Due To The Heterogeneous Backfilling, Which Was Heavily Contaminated With Interfering Bodies, Only Small Parts Of The Area Could Be Processed Using A Selective Ground-Encroaching Kmr. A Total Of 4 Anomalies Resulted In The Discovery Of Explosive Ordnance (1 X Inc4, 1 X Drop Container With 63 Inc4), And The Suspicion Of Explosive Ordnance Was Therefore Confirmed. Due To The Continued High Density Of Disruptive Objects Even After The Evacuation, No Explosive Ordnance Clearance Was Granted For The Areas. Furthermore, 7 Test Fields Were Created And Cleared Using Volume Clearance To A Depth Of 0.5 M And Gok. No Further Explosive Ordnance Was Found. The Clearing Target For The Total Area Is 2.0 M And Gok. In The Sub-Areas In Which Deeper Subsurface Interventions Are Planned, The Clearance Target Must Be Adjusted To A Maximum Of 5.0 M And Gok. The Area-Related Clearance Requirements Can Be Found In The Clearance Concept And Appendices Attached To The Tender Documents. In Order To Clear The Construction Site, Due To The High Density Of Obstructions, The Total Area (Approx. 30,000 M²) Should Be Worked On As Part Of A Volume Clearance Up To A Depth Of 0.50 M And Gok. The Resulting Excavated Material Must Be Made Available In The Form Of Heaps For Waste Sampling And, After Presentation Of The Test Results, For Disposal. Subsequently, Bed Probing Must Be Carried Out Using A Combination Of Tdem / Ferromagnetics. The Area Is Then Secured By A Solid Construction Fence. This Is Provided By A Third Party. If No Probing Level Is Reached At 0.50 M And Gok, The Respective Areas Must Be Processed By Means Of Volume Clearance In Coordination With The Client And The Construction Management For Explosive Ordnance Clearance Until A Probing Level Is Achieved. After Reaching A Level That Can Be Probed, The Clearance Of Explosive Ordnance Must Be Continued To The Respective Clearing Target Using A Ground-Interacting Kmr. For The Areas In Which Interventions Of Up To 5 M And Gok Into The Subsoil Are Planned, Preliminary Deep Soundings Should Be Carried Out Using A Vertical Gradiometer. Suspicious Anomalies Must Be Removed In Coordination With The Construction Management For Explosive Ordnance Clearance To A Depth Of 5.0 M And Gok. The Dismantling Of The Existing Dn1000 Combined Sewer Must Be Carried Out As Part Of An Explosive Ordnance Clearance During Construction. This Can Only Be Done As Part Of The Sewer Measure And Is Time-Consuming

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