DR. SPANG INGENIEURGESELLSCHAFT FÜR BAUWESEN, GEOLOGIE UND UMWELTTECHNIK MBH

Renewal of Wittighausen tunnel
on section 4120

Developer

DB Netz AG, Frankfurt

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PDF, 851 KByte

Project

• Renewal of the Wittighausen tunnel, built using mining methods in 1865/1866, located south of Würzburg on section 4120
• The 2-track electrified tunnel, approx. 138 m long, and the adjacent support walls are in a poor condition
• Renovation no longer makes economic sense

Our services

• Planning, invitation to tender and technical monitoring of subsoil investigations
• Soil and rock-mechanical laboratory tests
• Preparation of a geotechnical and tunnel engineering expert report
• Advising the client on geotechnical and tunnel engineering issues in the preliminary planning stage

Renewal of Cornberg tunnel

Developer

DB Netz AG, Frankfurt

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PDF, 823 KByte

Project

• Renewal of the Cornberg tunnel, built using mining methods in 1872-1875, on section 3600 between km 177.814 and km 178.534 on the Bebra-Göttingen section
• The 2-track electrified tunnel, approx. 719 m long, is in a poor overall condition and renovation no longer makes economic sense
• Options for analysis include widening the existing tunnel with continuing operation, building a new 1-track tunnel alongside in combination with the 1-track expansion of the existing tubes and building a new 1 or 2-track replacement tunnel with subsequent abandonment of the existing tunnel

Our services

• Evaluation of investigative measures already performed
• Planning, invitation to tender and technical monitoring of supplementary subsoil investigations
• Soil and rock-mechanical laboratory tests
• Preparation of a geotechnical and tunnel engineering expert report
• Advising the client on geotechnical and tunnel engineering issues in the preliminary planning, design and approval planning stages

Renewal of Pforzheim tunnel

Developer

DB Netz AG, Regional Project Management, Stuttgart

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PDF, 652 KByte

Project

• Relocation of the L570 Königsbacher Landstraße in order to clear the site
• A new 2-track tunnel approx. 900 m long will be built parallel to an existing tunnel built using mining methods and still in operation on track section 4200 between Karlsruhe Hbf and Mühlacker
• The existing tunnel will be backfilled following the opening of the new tunnel

Our services

• Expert services during construction for geotechnology, tunnel engineering and waste engineering
• Planning and technical support for supplementary investigative works
• Sampling and analysis for declaration of the excavated material
• Supplementary soil mechanical laboratory analyses
• Preliminary inspection of execution planning
• Technical support for tunnel driving
• Monitoring of the existing tunnel, inc. safeguarding services
• Groundwater monitoring
• Technical support for soil stabilization on the L570
• Distometer measurements

Katzenbühl tunnel, northern portal

Developer

DB Netz AG, Nuremberg

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PDF, 1018 KByte

Project

• DB track section 5903 runs through the 471 m-long Katzenbühl tunnel from km 88.2 to km 88.7 of the section
• There have long been problems with the ingress of water in the vicinity of the northern portal, leading to significant icing in winter and cause considerable maintenance expense

Our services

• Core borings with expansion to groundwater measuring point
• Analysis of the tunnel inner shell by means of core borings
• Preparation of a geotechnical expert report to determine the damage
• Renovation proposals

New tunnel at Herne
intersection for 6-lane widening
of the A43 motorway

Developer

NRW Road Construction Service, Ruhr regional office, Bochum

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PDF, 819 KByte

Project

• Redevelopment of the Herne intersection of the A42/A43 motorways, km 32.360
• Traffic in the heavily used south-west direction (Bochum towards Duisburg) will be directed to the A42 through a new 560 m-long tunnel with 2-lane widening
• The motorway intersection has a "modified windmill" shape

Our services

• Technical monitoring of the drilling works on site
• Geotechnical drilling coring
• Field and laboratory analyses
• Determination, technical monitoring/control and inspection of the laboratory tests
• Preparation of geotechnical expert report and tunnel engineering expert report

Stuttgart 21, planning approval section 1.5, tunnel from main railway station to Bad Cannstatt

Developer

DB Projektbau GmbH, Stuttgart 21 project

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PDF, 578 KByte

Project

• As part of the Stuttgart 21 project a new intercity and an urban railway tunnel will be built from the main railway station to Bad Cannstatt in planning approval section 1.5
• The tunnels are approx. 3.5 km and 2.6 km long
• They link the main railway station to the Neckar bridge that is to be built
• The tunnel will link the new main railway station with the intercity and urban railway lines in the Filstal and Neckartal valleys and the new sidings in Untertürkheim

Our services

• Geotechnical support during construction
• Evaluation of weekly reports and working face recordings on the foundation conditions of the client's contractors
• Supplementary working face recordings
• Assessment in weekly reports of the geological conditions encountered in the individual driving operations

Armannsberg tunnel

Developer

DB Netz AG, Nuremberg

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PDF, 762 KByte

Project

• The two-track, non-electrified DB track section 5903 runs through the 840 m-long Armannsberg tunnel at approx. km 108.115
• In 1990 the tunnel was fully stabilized with a proven shotcrete shell in the roof
• Intrados drains were also installed
• These intrados drains have become clogged up at 25 locations
• The shotcrete shell shows signs of age-related damage
• The abutments have open gaps in 50 blocks

Our services

• Inspection to determine the need for fundamental repair

Building project B10/B14, Leuze connection

Developer

City of Stuttgart, civil engineering and municipal drainage department, Stuttgart

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PDF, 683 KByte

Project

• Construction of a 3rd tube in the Leuze tunnel in the cut-and-cover method as a water-impermeable concrete structure
• Lengthening of all three Leuze tunnel tubes inc. merging exit from the Berger tunnel at the eastern portal of the B10/B14 by about 70 towards the east
• Preparation of a ramp up to the König Karls bridge
• Transition to the B14 into the city through the short Bergersprudler tunnel
• Road adjustments will be required following completion of the project

Our services

• Geotechnical and geological support during construction
• Environmental support and coordination during construction
• Analysis of contamination and sampling of debris, pit dredgings and the material obtained from bored piling works
• Waste management
• Declaration analysis of filling material and soils
• Environmental requirements, landfill regulations, disposal of excavated road material
• Examination of disposal routes and records

Renewal of the Rieneck and Ruppertsberg tunnels

Developer

Deutsche Bahn AG, Frankfurt

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PDF, 1056 KByte

Project

• Renewal of the Ruppertsberg tunnel including support walls immediately before and after the Ruppertsberg tunnel on DB section 3825 from Flieden Hbf to Gemünden in accordance with regulations currently in force
• Renewal of the Rieneck tunnel
• A new tunnel built parallel to the Rieneck tunnel is under consideration

Our services

• Subsoil evaluation and foundation works consulting
• Invitation to tender and monitoring of all laboratory and field tests
• Geological and geotechnical expert reports
• Tunnel engineering expert reports
• Geotechnical consultancy

Hirschhagen tunnel, A44 motorway

Developer

Hessen Mobility, Roads and Traffic Management department, Kassel

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PDF, 627 KByte

Project

• Construction of a new motorway tunnel with two tubes for the eastward lengthening of the A44 motorway
• 4,100 m long
• Excavation cross-section up to 120 m²
• Ventilation galleries using the mining method
• Geology: mottled sandstone approx. 300 m in length
• Adjoins vibration-sensitive developments with overburden < 15 m in places (Lossetal valley)
• A well gallery will be built in the Losse meadow
• A subrosion depression will be driven through

Our services

• Geotechnical and tunnel engineering consultancy during construction
• Material transport simulation in the feed area of the expanded well gallery
• Risk assessments pursuant to soil protection and water management legislation
• Analysis of pollution with TNT derivatives in the watercourses
• Analysis of vibration measurements

Construction and rehabilitation
of Rudersdorf tunnel

Developer

DB International GmbH, Duisburg

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PDF, 685 KByte

Project

• Completed in 1915, the tunnel is located between km 117.630 and 120.282 on the heavily used, two-track electrified Hagen-Haiger section
• The length of the tunnel is 2,652 m
• The following options will be examined in the preliminary planning phase:
  • renewal of the existing tunnel for 2-track operation
  • construction of a new 1-track tunnel running alongside and renewal of the existing tunnel for 1-track operation
  • construction of two new 1-track tunnels running in parallel

Our services

• Planning, invitation to tender for drilling and investigation programmes for the existing tunnel and the new tunnel
• Expert technical support for drilling and investigation programmes
• Analysis of laboratory and field tests
• Geotechnical and tunnel engineering report pursuant to RiL 853 and DIN 4020
• Geotechnical and tunnel engineering consultancy in the preliminary and design planning phases

Construction of new
flood diversion tunnel from the Freiberg basin to the Mulda high-water retaining basin

Developer

Freiberg basin / Zschopau dam and reservoir services, Lengefeld

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PDF, 992 KByte

Project

• Construction of the new grade tunnel as part of the construction of the high-water retaining basin above the village of Mulda in the Chemnitzbach valley
• Length of flood diversion tunnel approx. 4,350 m
• Round cross-section between 3.89 and 4.49 m
• The overburden is no more than approx. 120 m, in the middle approx. 80 m

Our services

• Specialist supervision of geotechnical investigation
• Subsoil evaluation and foundation works consultancy pursuant to HOAI §§ 91 ff
• Tunnel engineering expert report
• Project specifications and schedule of works for the invitation to tender for the field investigation

S21 northern ring connection
at Potsdamer Platz, 2nd construction phase from Berlin main railway station to Potsdamer Platz

Developer

Deutsche Bahn AG through OBERMEYER PLANEN + BERATEN GmbH

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PDF, 347 KByte

Project

• Construction of a new underground two-track suburban railway line (section 6071) approx. 1.2 km long from Berlin main railway station to Potsdamer Platz
• Crossing underneath the Spree and Spreebogenpark
• Passing under the underground Bundestag access building
• Passing over the underground railway
• Connection to the crossing structure with the S21 at the “Heuboden” railway facility

Our services

• Investigation concept
• Invitation to tender for the subsoil analyses
• Geotechnical site management for the boring works
• Subsoil assessment and foundation works consultancy for the planning
• Tunnel engineering expert report
• Analyses and recommendation for the tunnel construction
• Rough and detailed concept for soil utilization and disposal

Replacement of track
in Stadtwald tunnel

Developer

DB Netz AG, Structural Engineering, Duisburg

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PDF, 338 KByte

Project

• Renewal of track in the already repaired Stadtwald tunnel, section 2161 (Essen-Werden - Essen-Stadtwald)
• A new side drainage system will be established on the right of the track during the replacement
• The existing section 2161 is a 2-track electrified section that runs through the tunnel as a single track
• The Stadtwald tunnel has a length of 247 m

Our services

• Expert report to ascertain the condition for further planning of the tunnel drainage
• Mapping when the track is not in use
• Investigation of the existing shotcrete shell through measurements and boreholes
• Stability analysis

Schwerte tunnel

Developer

DB Netz AG, Structural Engineering, Duisburg

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PDF, 333 KByte

Project

• Built in 1912, the tunnel at km 5.569 to km 6.364 on track section 2113 (Dortmund-Hörde - Schwerte) is subject to increasing deterioration
• The length of the tunnel is 795 m
• The tunnel is not electrified

Our services

• Archive research
• Inspection and mapping of the damage when the track is not in use
• Photograph recording of the condition
• Status report with expert evaluation
• Mapping
• Preparation of an investigation programme
• Stability analysis and evaluation

Rehabilitation of
Schlossberg tunnel

Developer

Tübingen Regional Administrative Authority, section 43

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PDF, 348 KByte

Project

• The tunnel is being rehabilitated with the full closure of one tube at a time
• 2 tubes each with 2 lanes and a centre gallery
• Length: approx. 265 m
• Built in 1979 using mining methods
• Cross-section form: pipe arch

Our services

• Damage survey
• Planning services for tunnel rehabilitation
• Elaboration of the planning documents through to readiness for tendering, with schedule of works
• Description of construction works and cost estimate
• Project planning pursuant to HOAI 2009 § 42, service phases 2, 3 and 6

Tunnels 1 and 2, Erbil, Kora-Shaqlawa-Qandeel Highway Project, Iraq

Developer

General Roads and Bridge Construction department of the regional government of Kurdistan through Al Muhandis Consulting Engineers and RRI, Rhein Ruhr International GmbH, Dortmund

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PDF, 270 KByte

Project

• Construction of a new 30 km highway in the north of Kurdistan
• The highway project includes 2 tunnels, each comprising two separate tubes
• Tunnel 1 has a length of 935 m
• Tunnel 2 has a length of 380 m

Our services

• Local site survey
• File research in Iraq, Erbil site
• Expert report on the need for base reinforcement / sealed base
• Static proofs using the finite element method to assess whether a base for the inner shell is required, including earthquake stress and parameter study

Construction of new road
underpass, Iselshausen

Developer

Calw District Authority, Highways Office

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PDF, 290 KByte

Project

• Construction of a new road underpass through a railway embankment approx. 25 m high using mining methods
• Length approx. 60 m
• Construction of a new cycle path underpass through the embankment
• Construction of new roadside support walls for the new approx. 800 m long link road

Our services

• Subsoil investigation with corings, trial pits and soundings
• Subsoil evaluation and foundation works consultancy
• Services pursuant to HOAI § 92 (1), phases 1 to 3, for the road tunnel, the cycle path underpass, the road construction and the supporting structures
• Support for the developer in geotechnical and tunnelling aspects during construction

Black Forest Railway,
Ostelsheimer Kurve tunnel

Developer

Calw District Authority and Böblingen District Authority

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PDF, 819 KByte

Project

• Reactivation of the Calw-Weil track section shut down 20 years ago, length approx. 23 km
• The current loop around the Hackstberg mountain is to be shortened by an approx. 400 m long tunnel
• Two-track cross-section with max. overburden of approx. 12 m
• Location in nature conservation area

Our services

• Geotechnical analysis with core drilling and soundings
• Soil and rock-mechanical and mineralogical laboratory analyses
• Determination of stratum and fissure orientation with bore hole scans
• Geotechnical expert report for tunnel and cutting options
• Preliminary tunnel engineering expert report with initial geo-logical, hydrogeological and tunnel engineering evaluation
• Planning services for the tunnel pursuant to HOAI, § 55 (1), phase

Retrofitting of
Reutherberg tunnel

Developer

Freiburg Regional Administrative Authority

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PDF, 903 KByte

Project

• The Reutherberg tunnel is a 1256 m long, single-tube road tunnel on the 294 trunk road
• The tunnel is part of the Wolfach bypass in the Black Forest
• Construction of a new rescue gallery in order to improve road safety

Our services

• Geotechnical advice during construction
• Geological and hydrological supervision of tunnel driving works, inc. mapping of the drive face

Salvage excavation, Cologne Waidmarkt

Developer

City of Cologne, Mayor, Office for Bridge and Urban Railway Construction

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PDF, 596 KByte

Project

• Following the collapse of the municipal archive, an excavation pit is being dug at Waidmarkt in Cologne to retrieve the buried archives
• The pit is protected on three sides by a bored pile wall, the fourth side is formed by the diaphragm wall of the passageway for changing platforms
• At the transition from the bored pile wall to the diaphragm wall there is still an opening for system reasons that is sealed off by an ice guard

Our services

• Inspection of the execution plans for the ice guard in respect of geotechnical and static aspects

Major project VDE 8th Nuremberg-Berlin, Nuremberg-Ebensfeld section, 2nd freight train section exploratory programme

Developer

DB ProjektBau GmbH, Nuremberg

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PDF, 880 KByte

Project

• Planning and upgrade of project section 13, freight train line
• The section includes the two-track Pegnitz tunnel
• Project section 13 (freight train tunnel) includes the two project sections 13 (freight train tunnel), km 4.935 to km 13.500, and 16 (Fürth north), km 13.500 to km 15.144

Our services

• Specialist site management and construction supervision for the 2nd exploratory programme
• Preparation of a geological engineering, hydrogeological and water management report based on the findings of the 2nd exploratory programme and the findings of the completed line determination investigations (1992) and the 1st exploratory programme (1993)
• Expert report on construction of the freight train tunnel, L=8,300m

Feasibility study for the B240 crossing the Ith

Developer

Regional Roads and Traffic Authority, Hanover

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PDF, 814 KByte

Project

• To improve the flow of traffic on the B 240 trunk road between Fölziehausen and Eschershausen, a new route is planned
• 5 tunnel options were elaborated in a feasibility study

Our services

• Archive research
• Establishment of an exploratory programme
• Preparation of the tender documents for award of the exploratory works contract
• Specialist monitoring of the drilling works and core drilling survey
• Geological report on the findings
• Preliminary geological report for the regional planning process

New Kohlberg tunnel

Developer

DEGES Deutsche Einheit Fernstraßenplanungs– und Baugesellschaft mbH, Berlin

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PDF, 286 KByte

Project

• Construction of a new Kohlberg tunnel to bypass the village of Pirna as part of the construction of the new B 172
• The tunnel is 300 m long, the overburden up to 25 m
• The tunnel has 3 lanes and emergency footpaths on both sides
• The road cross-section is 13.55 m
• The tunnel is being driven in alternating sandstone-maristone layers (rag) and the overburden consists largely of sand and disintegrated sandstone and maristone

Our services

• Static investigation for a bored tunnel construction
• Execution of 2 sections as 2D FE calculation
• Structural engineering planning pursuant to HOAI 2009 § 49, stages 1 to 3, for the bored tunnel construction method

New Wendlingen - Ulm road, project section 2.2 Boßler tunnel, Steinbühl tunnel, Filstal bridge

Developer

DB ProjektBau GmbH, Stuttgart

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PDF, 390 KByte

Project

• The new Wendlingen-Ulm road climbs up the Schwäbisch Alb mountains
• The main structures are the 490 m long Filstal bridge, the 4,850 m long Steinbühl tunnel and the 8,800 m long Boßler tunnel
• Geotechnically the project section is dominated by brown and white jura
• Karst
• Swelling rock
• High groundwater levels
• Some pressure-exerting rock

Our services

• Contractual, content and formal examination of the available expert reports and information about geology, hydrogeology, geotechnics and tunnel construction techniques
• Plausibility review of the conclusions and recommendations of the expert reports

Renovation of Neckartailfingen tunnel as part of the B 297

Developer

Stuttgart Regional Administrative Authority

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PDF, 506 KByte

Project

• Trunk road tunnel approx. 250 m in length
• Adjacent troughs on both sides
• Built in cut-and-cover construction in 1992
• Location approx. 5 m parallel to the Neckar
• Considerable damage since 1997
• Road surface raised
• Water ingress into shafts and block joints
• Spalling on walls

Our services

• Damage survey
• Exploratory excavation at the block joints
• Expansion of control levels beside the tunnel in order to ascertain a possible relationship between the groundwater level and the ingress of water
• Determination of causes of the damage
• Preparation of a tunnel volume
• Renovation concept of preliminary planning nature

Hahnenkamp tunnel, Bad Oeynhausen

Developer

NRW Roads Service, East Westphalia-Lippe regional office

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PDF, 688 KByte

Project

• Construction of new A30 as northern bypass of Bad Oeynhausen
• Cut-and-cover construction of Hahnenkamp tunnel
• Considerable below-grade portion with cuttings up to 10 m deep
• Tunnel length approx. 450 m with 2 tubes, each 2-lane

Our services

• Subsoil expert report and foundation work consultancy pursuant to § 92 HOAI, part XII, stages 1 to 3
• Drilling support
• Field investigation
• Laboratory tests

Darmsheim tunnel

Developer

Stuttgart Regional Administrative Authority, Ludwigsburg

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PDF, 654 KByte

Project

• Construction of new Darmsheim tunnel as northern bypass of Darmsheim, rural road 1182
• Tunnel with a length of approx. 498 m
• Moderate overburden of approx. 20 m
• 2-lane cross-section with an excavation area of 90 m²

Our services

• Geotechnical and tunnel engineering works consultancy
• Subsoil assessment and foundation works consultancy with the basic services pursuant to HOAI, § 92, part XII
• Tunnel engineering expert report
• Invitation to tender for the field investigation and laboratory and field tests

Construction of new Bühl tunnel, trunk road B 62n / investigation of current situation of the Niederschelden tunnel

Developer

NRW Roads Service, Siegen regional office

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PDF, 73 KByte

Project

• Construction of a new road tunnel with curve
• Both accesses cross the 2-track electrified Betzdorf-Siegen railway line
• Tunnel and preliminary cuttings are to be driven by explosives
• Investigation of the of the current situation of the Niederschelden tunnel (railway)

Our services

• Documentation on the condition of the 350 m long, two-track railway tunnel
• Investigation of the existing situation and the mountain with 26 corings from the railway tunnel while services continued
• Assessment of the condition, operational safety and stability with and without facework influences

Nittel tunnel

Developer

DB Netz AG, Frankfurt am Main Projektleitung: DB ProjektBau GmbH, Frankfurt am Main

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PDF, 759 KByte

Project

• Renewal of a railway tunnel 574 m in length
• Conversion from two-track to single track route
• Construction of a new arch
• Floor made deeper
• Tunnel extended by approx. 30 m
• Erection of trough structures in front of the entrances

Our services

• Preparation of an investigation concept
• Obtaining approvals for the investigation
• Invitation to tender for the investigative measure
• Monitoring and evaluation of the investigation
• Geotechnical assessment of the mountain and tunnel shell
• Recommendations for design and execution

Construction of new flood diversion tunnel from the Freiberg basin to the Mulda high-water retaining basin

Developer

Freiberg basin / Zschopau dam and reservoir services, Lengefeld

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PDF, 688 KByte

Project

• Construction of a new flood diversion tunnel as part of the construction of the high-water retaining basin in the Chemnitzbach valley
• Length approx. 4,350 m
• Round cross-section between 3.89 and 4.49 m
• 810 m bore with depths up to 135 m

Our services

• Drafting of project specifications and schedule of works for the invitation to tender for the field investigation
• Invitation to tender for the works
• Specialist supervision of the geotechnical investigation
• Tunnel engineering expert report

New construction of the Metro 4 underground

Developer

DBR Metro Project, Budapest

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PDF, 669 KByte

Project

• Underground rail connection between south-west and north-east Budapest
• 14 stations over a distance of 10.5 km
• Shield driving method applied in clay and sand up to 31 m below the site surface
• bis zu 31 m unter GOK
• 5.2 m tunnel cross-section
• Danube crossing

Our services

• Panel of experts
• Geotechnical advice during execution
• Advice on tunnel construction during execution
• Risk analysis
• Assessment and acceptance of amendments to contract

Johannesgraben Tunnel, Stuttgart

Developer

Stuttgart Regional Council, Department 43

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PDF, 83 KByte

Project

• Single tunnel pipe, within which the lanes in each direction are separated by a central wall
• Approx. 200 m long
• Constructed in the late 1970s using open-type construction
• Damage found in the area of the block joints and in the bearing and springer area

Our services

• Identifying the damage and reporting, in advance of planning renovation works
• Camera run along drainage pipelines
• Mapping of tunnel damage
• Status report and status assessment

DB Nordbahntrasse,
change of use of a former rail
section approx. 22 km long
as a pedestrian and cycle path

Developer

Wuppertal City Council, Dept. for Road Maintenance and Engineering

Download the project description
PDF, 109 KByte

Project

• Tesch Tunnel (523 m)
• Dorp Tunnel (488 m)
• Dorrenberg Tunnel (175 m)
• Engelnberg Tunnel (171 m)
• Rott Tunnel (364 m)
• Fatloh Tunnel (85 m)
• Schee Tunnel (2 x 722 m)

Our services

• Tunnel investigation (drilling works)
• Status investigation and documentation
• Report on tunnel renovation
• Approximate statics calculation for CURRENT status
• Status assessment / Renovation concept
• Cost estimate
• Preliminary planning
• Processing as an engineering group

Stuttgart urban railway, U15, 27. Zuffenhausen section

Developer

Stuttgart City Authorities, Underground Civil Engineering Dept.

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PDF, 472 KByte

Project

• Extension of the U 15 underground rail section in an inner-city location
• Section length 1,380 m
• 2 tunnel sections in open-type construction, approx. 248 m and 48 m long, including subterranean operating rooms
• Tunnel worked systematically, approx. 581 m long
• Construction of an escape stairwell with approx. 25 m deep shaft design
• Subterranean stop in Kirchtalstrasse, approx. 186 m long
• Two stops in the inclined area at the start and end of the section, Rathaus (town hall - approx. 70 m long) and Salzwiesenstrasse (approx. 94 m long), including platforms and access facilities

Our services

• Execution planning of the construction element and support framework planning for the systematically worked tunnel section, HOAI § 55, Lph. 5, and § 64, Lph. 4 and 5, in engineering group
• Technical processing
• Technical record-keeping for the engineering group
• Creating plans for shell and strengthening

New construction of the Losenberg Tunnel, Olsberg bypass

Developer

Landesbetrieb Straßen NRW, Meschede

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PDF, 151 KByte

Project

• New construction of an inner-city tunnel as part of the B 480n through the Losenberg
• Single-pipe tunnel worked systematically
• 153 m long
• In the entrance area, a main road with am overcovering of just 1.5 m with regular traffic is undercut, protected by a 20 m long shield-driven pipe

Our services

• Technical processing
• Proofs of safe status, including 3D FEM simulation of driving
• Execution planning pursuant to HOAI § 55, Lph5, § 64 Lph 4 and 5
• Geotechnical charting of the driving site, and support during construction

New construction, Schmücketunnel, BAB A 71, Heldrungen

Developer

DEGES, Berlin

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PDF, 915 KByte

Project

• New construction of a road tunnel as part of the BAB A 71
• Length 1,725 m, 2 pipes each with 2 carriageways, cross-section RQ 26 t, 5 cross cuts
• Entrance cuttings with pinned sprayed concrete walls (construction time-related) and pinned floor (permanent)
• Entrance area over 80 m length with rear-anchored support walls up to approx. 3 m height

Our services

• Geotechnical advice to support construction
• Geotechnical mapping of the four advances to be worked simultaneously
• Engineering geology documentation
• Check on geotechnical plans

New construction of the BAB A 46 between AS Hemer and the B 7

Developer

Landesbetrieb Straßen.NRW, Nl Südwestfalen, Hagen

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PDF, 717 KByte

Project

• Extension of the A 46 in Sauerland from the existing AS Hemer to the B 7
• Overall length of route approx. 7,500 m
• The open-air section is approx. 5,200 m long
• Multiple-section bridge approx. 750 m long
• Two tunnel constructions: Bemberg Tunnel approx. 300 m, Stübecken Tunnel , approx. 1250 m

Our services

• Assessment of subsoil, advice on foundations and tunnel engineering advice
• All service phases covered by the HOAI, § 92 such as field investigations, monitoring of field investigations, surveying the dead works and carrying out lab and field tests as part of the investigation, taking into account DIN 4020

Tunnel Hirschhagen, BAB A44

Developer

Kassel Office for Roads and Transport

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PDF, 641 KByte

Project

• Construction of a motorway tunnel with two tubes, length 4.100 m, cross sectional area 120 m², as well as a ventilation gallery, driving by drilling and blast technique, partly situated beneath a military arsenal

Our services

• Design of exploration schedule
• Obtaining clearance for exploration
• Tendering, supervision and evaluation of subsoil exploration
• Evaluation of subsoil
• Recommendations for design and construction of the tunnel
• Consultancy for tunnel construction

Burgholz Tunnel, new construction
of the L418 Southern Ring Road Wuppertal

Developer

NRW Land Road Construction Division, Essen Branch

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PDF, 784 KByte

Project

• New construction of an expressway tunnel with two tunnel pipes, 1,865 m and 1,787 m long
• Excavation corss-section up to 119 m² with 6 crosswise galleries
• Systematically worked
• Installation of two operating buildings, one bridge construction and seven supporting and sound insulating walls

Our services

• Geotechnical advice to support construction
• Determining the definitive calculation key ratios
• Geological mapping
• Geological engineering documentation of the tunnel
• Advice on foundation works
• Formal recording of hydrogeological evidence

New construction of an S-Bahn
tunnel in Leipzig city centre
between Leipzig Hbf. and the Bayerischer Bahnhof Developer

Developer

DEGES, Berlin

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PDF, 378 KByte

Project

• Underground electrified S-Bahn section, length 3.5 km, of which 2.6 km was systematically worked; two single-track tunnel pipes, external diameter 9 m, spacing 0.5 to 1 diameter; 4 stations in open-type construction
• Subsoil in loose and mixed-particle soils (glacial terraces, base moraines), overwhelmingly fine gravels, coarse clays and clays
• Incorporating the construction works up to 18 m into several, partly highly permeable groundwater aquifers, diagonally to crosswise to the direction of flow; influence on natural groundwater regimes during construction and permanently

Our services

• Subsoil report
• Tunnel construction engineering/geological report
• Report on hydrogeology
• Advance planning of tunnel with mechanical advance
• Expert advice to developer during tendering (HOAI Part XI)
• Expert advice to developer during execution (HOAI Part XI)
• Expert and detailed planning on request from the developer
• Expert monitoring of construction during the build
• Groundwater monitoring

Tunnel Frillendorf, Germany

Developer

Landesbetrieb Straßen.NRW

Download the project description
PDF, 583 KByte

Project

• Construction of federal motorway (BAB) A 52 between AD Essen - Ost (A 40) and AK Essen - Nord (A 42) .
• Undercut of BAB 40 and several railway tracks
• Length 680 m lang, adjacent open gallery of 410 m
• North - east connections to motorway junction by tunnel ramps of 340 m and 400 m.

Our services

• Tendering of exploration drillings
• Supervision of exploration survey
• Laboratory and field tests
• Subsoil evaluation
• Geotechnical consultancy

Coschütz Tunnel, BAB A17
Dresden - Prague

Developer

Walter Bau-AG, Nuremberg

Download the project description
PDF, 155 KByte

Project

• New construction of 2 twin-pipe motorway tunnels
• Length 2,332 m
• Standard cross-section RQ 29t

Our services

• Geotechnical investigation of rock outcrop in the Plaunscher Grund area
• Execution planning for the entrance blocks up to 18 m behind the stop walls of both tunnels
• Rock securing for rock outcrops on both stop walls
• Design of construction elements and structural frameworks for tunnel entrance and rock securing
• Expert geotechnical monitoring of construction for tunnel entrance and rock securing
  
  

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