The B 212n is planned as a non-cultivated road outside of built-up areas. The total length of the extension is approximately 13.8 km (12.3 km of Lower Saxony and 1.5 km Bremen).

The installation is to be carried out as a 2+1 cross-section with mutual overtaking options (RQ15.5) with 4 interchanges and 14 bridge structures. Agricultural transport and cycling are carried out by separate routes. The route runs flood free on a dam, so all intersections with water bodies and roads are passed through the B212n.

As further planning steps for the approved preferred variant 1B, the design plans are currently being developed as the next step of the required planning depth. A preliminary and approval design for the entire route is currently being prepared and a planning approval procedure is requested.

As part of this award, services for a geotechnical design report (line appraisals and civil engineering structures) will be awarded without digestion work with a length of 10.85 km.

As part of the soil study, there are restrictions on natural stewardship in some areas.

The planned route runs on unloadable subsoil. In the case of road construction, such construction measures must be classified in the geotechnical category GK 3 according to DIN 4020, which means that an expert in geotechnical engineering is always required.

1.1 Clarification of the task (track and BW), list of investigation programs:

1.1.1 Clarifying the task, defining and presenting all possible services: building site exploration, laboratory tests, etc.

1.1.2 Clarify the precise approaches to utilities, coordination and coordination with utilities representatives. view the existing documents,

1.1.3 Geotechnical study programme as required, registration of the outcrops to be carried out in location and profile plans, taking into account areas of protection:

— Core drilling: attachment points, depth,

— Progors: starting points, depth,

— pile core probing,

— Ramming probes,

— peak pressures.

1.1.4 Field Trials Program:

— arrangement of groundwater measuring points taking into account areas worthy of protection,

— arrangement of large-scale tests for the installation and compaction of certain earth masses,

— order whether or, if so, which further information is required in the area of landfills still operated or former.

1.2 Preparation of the public. call for tenders and participation in the award of the digestion work.

For the preparation and implementation of the necessary digestion work according to VOB (drilling), including the digestion concept and estimation of the costs of the digestion work, by a drilling company to be commissioned separately, the contractor shall prepare the tender documents (in accordance with VOB with STLK). The documents must be agreed with the client. The following services are required for this:

1.2.1 Preparation for the award of digestion work

— Identify quantities as a basis for setting up LVs,

— taking into account the present aerial survey with regard to digestion work (taking up performance positions for support by appropriately trained specialists),

— Establish the SOW with specifications,

- cost estimate.

1.2.2 Participation in the award of the digestion work:

— compilation of procurement and contract documents,

— to participate in negotiations with tenderers,

- Participation in placing the order.

1.3 Field investigation monitoring:

During the completion of the digestion work according to VOB (drilling) by the separately commissioned drilling company, the contractor supervises the digestion work to be carried out. For this purpose, the following services are to be provided:

— preparation (absence of ordnance, drill indicator, grant agreements),

— geotechnical and soil-related construction supervision of the explorations,

— monitoring of drilling work, including travel costs and construction diary (according to HVA b-StB),

— control of depths and sampling by type, number and quality,

— allowance of possible (corridor) damage caused by exploratory measures,

— Review of daily reports,

— joint measurement of building site construction work,

— consultation with residents, management and other stakeholders,

— examination of the mass statements for digestion work carried out,

— audits of the invoice of the drilling company.

Expenditure estimated 100 days (duration 20 KW, 5 AT each)

1.4 Laboratory tests:

1.4.1 Soil mechanical laboratory tests with evaluation of results,

1.4.1.1 Determination of particle size distribution according to DIN 18123, wet screening,

1.4.1.2 Order of particle size distribution according to DIN 18123, sludge analysis,

1.4.1.3 Order of particle size distribution according to DIN 18123, combined sieve/slurry analysis,

1.4.1.4. Contest. of the density according to DIN 18125 T1 (new: DIN EN ISO 17892-2),

1.4.1.5 Set of shear parameters according to DIN 4094-4, DIN EN ISO 17892-7, DIN 18137-1, DIN EN ISO 17832-9,

1.4.1.6 Set of Shear Resistance Coinded Ground Triaxal Device (UU) DIN 18137 T2,

1.4.1.7 Best Shear strength, rough soil, triaxal device (CU) DIN 18137 T2,

1.4.1.8. Order of water content according to DIN 18121 T1,

1.4.1.9 Exiting the flow and roll-out limit according to DIN 18122-1,

1.4.1.10 Set of storage density according to DIN 18126,

1.4.1.11 Order of organic components according to DIN 18128,

1.4.1.12 Part of the stiffener module (incl. timing) to DIN EN 17892-5,

1.4.1.13 Best of water permeability according to DIN 18130, DIN 18130-2, TP BF-StB, Part C 9,

1.4.1.14 levels of abrasiveness according to NF P 18-579;

1.4.1.15 Order of grain density according to DIN 18124,

1.4.1.16 Proctor test according to DIN 18127.

1.4.2 Chemical analysis of soil/rubble:

1.4.2.1 Determination of lime content according to DIN 18129,

1.4.2.2 Analysis of GW sample for concrete aggressiveness DIN 4030,

1.4.2.3 Subs GW sample for steel aggressiveness DIN 50930,

1.4.2.4 ABSTR. of soil sample of the original substance and eluate according to LAGA,

1.4.2.5 Chemical analysis of soil samples (lying subsoil) according to LAGA according to Table II. 1.2-1, solid,

1.4.2.6 Chemistry analysis of soil samples (horizontal subsoil) according to LAGA according to Table II. 1.2-1, eluate,

1.4.2.7 Chemistry analysis of soil samples (lying subsoil) according to LAGA according to Table II. 1.2-1, eluate without heavy metals,

1.4.3 PASS analysis with regard to the sulphate acidic properties of organic soils (Geofacts 25),

1.4.3.1 Humus content according to DIN ISO 10694 (DIN 1996) or annealing loss according to DIN 19684-3 (DIN 1977b),

1.4.3.2 pH value according to DIN ISO 10390 (DIN 2005) and current limescale requirements according to DIN 19684-1 (DIN 1977a),

1.4.3.3 Carbonate content according to DIN ISO 10693 (DIN 1997)

1.4.3.4 Acid-forming sulphur.

— from jarosite and pyrite according to Fig & Leisen (1973) or DIN 19684-9 (DIN 1977c, pyrite only),

— from pyrite according to DIN 51724-2 (DIN 1999) or Gröger, Hamer & Blankenburg (2009).

1.4.3.5 Dry bulk density according to DIN ISO 11272 (DIN 2001),

1.5 Geotechnical design report (line and BW 01 to 08).

— Expert report including presentation at the AG,

— preparation of the geotechnical report (earthworks/structures GK 3) in accordance with the lb. on the basis of the requirements of the M PU,

— Final report in accordance with service description 3 times in paper form (if applicable in colour), digital as PDF file,

— presentation and evaluation of the field tests, if necessary photographic documentation,

— presentation, evaluation and evaluation of the results of laboratory tests,

— Indication of allocation classes and waste codes, identification of the way of disposal.