DR. SPANG INGENIEURGESELLSCHAFT FÜR BAUWESEN, GEOLOGIE UND UMWELTTECHNIK MBH

Project

• DB section 2801 is a two-track section.
• Following a 2004 report on the mining and geotechnical situation and with regard to stability of the surface, there is a high likelihood that the section of track between km 24.000 and km 24.770 is susceptible in places to risks of sinkholes, subsidence and settling

Our services

• Establishment of basis of the project
• Investigative and stabilization concept
• Invitation to tender
• Expert support for the investigative and stabilization measures
• Final documentation

Project

• In accordance with legislation on dealing with the after-effects of war, areas in the Doggerstollen tunnel system in the Houbirg at Happurg that are at risk of collapse will be permanently stabilized

Our services

• General establishment of basis of the project
• Performance of project and structural engineering planning pursuant to HOAI § 43 and HOAI § 49 for stages 1 - 2
• Examination of options and agreement of the project goals with the general public parameters in the form of a decision paper for construction (ES-Bau)
• Landscape management support plan
• Special species protection assessment
• FFH impact assessment

Project

• The shallow mine of the "Hauptflöz" layer in the vicinity of the properties at Zum Sportplatz 10-14 in Sprockhövel was investigated and stabilized on behalf of Alte Haase Bergwerks-Verwaltungs-Gesellschaft mbH, Dortmund
• According to official figures the mine extends over a distance of approx. 160 m
• It is located in the vicinity of a school, a kindergarten and below the "Zum Sportplatz" road.

Our services

• Planning and invitation to tender for the investigative and stabilization measures
• Expert support for the investigative and stabilization measures

Project

• Expert report on the rock cutting of DB track section 2854, km 19.864 in the vicinity of the village of Winterberg following the appearance of a sinkhole over a former mine gallery

Our services

• Clarification of the cause of the damage
• Inspection of mine plans and elevations
• Study of the stabilization options
• Technical support

Project

• Restoration of the "Neu Glück" pit
• The town of Plettenberg has been using the galleries of the former "Neu Glück" pit on Weidenstraße for guided tours since 2008
• The galleries show localised fissures, giving rise to fears of significant detachment

Our services

• Geotechnical survey
• Stability investigations
• Proposals for stabilization
• Pit visits

Project

• Hollows have been dug in the rock walls in the municipal gardens and in the adjacent Grundgraben in Überlingen for a variety of purposes since the Middle Ages.
• The gardens contain what is known as the Kneipp cellar.
• Size approx. 8 m x 3 m, up to approx. 3 m high
• The Grundgraben contains the rock-cut cellar used by the town gardeners as a store, approx. 50 m long, up to approx. 8 m high and with a span of approx. 6 m

Our services

• Geotechnical analyses of stability
• Consulting services
• Study of various stabilization options

Project

• 3 former mineshafts in Mühlheim are being examined with regard to risk management for Arnsberg District Authority

Our services

• Expert support for the investigative and stabilization measures
• Analysis of the mine plans and elevations and the mining documents Preparation of the analys
• Preparation of tender documents

Project

• Cracks and damage on a 1.5-storey residential building on a hillside in Minden
• The cracks might be caused by near-surface coal mining

Our services

• Inspection of mine plans and elevations
• Preparation of an investigation concept
• Preparation of tender documents
• Expert support for the investigative and stabilization measures
• Final documentation

Project

• A sinkhole has appeared on Zechenstraße in Dortmund, near a former air raid shelter

Our services

• Subsoil investigations through soundings
• Preparation of a more detailed investigation concept
• Preparation of the tender documents for the investigative and stabilization measures
• Technical site management of the mining investigations and the backfilling and compaction works
• Final report

Project

• Sinkhole in a vineyard on the edge of the Rhine rift valley as a result of an old iron ore mine
• Diameter approx. 25 m, depth also approx. 25 m

Our services

• Inspection of mine plans and elevations
• Inspection of mine
• Assessment of stability
• Expert report for the court

Project

• Construction of a new supermarket on the premises of a former car workshop
• On the grounds is an abandoned surface shaft opening (Crone shaft: diameter ≈ 2.8 m, depth ≈ 44 m), that is neither filled in nor secured

Our services

• Subsoil assessment
• Subsoil evaluation and foundation work consultancy
• Risk assessment
• Inspection of mine plans and elevations
• Investigation of mine condition
• Safety coordination
• Expert support for the filling/compaction works on mine cavities (former Crone shaft)

Project

• Investigation and inspection of two former lunettes in Dortmund-Hörde
• According to official figures the shafts have a vertical depth of approx. 18 m and 20 m

Our services

• Inspection of mine plans and elevations
• Preparation of the investigation concept
• Preparation of tender documents
• Supervision of works
• Specialist support
• Evaluation of the stability of the shafts

Project

• Danger of a cave to the surface caused by workings of a vein
• Downfall zones were discovered in several offset holes drilled under Benninghofer Straße

Our services

• Access holes in the area of Benninghofer Straße
• Construction support for access and fill holes
• Specialist support
• Supervision of works

Project

• Partially cellared, mainly 5-storey business premises with penthouse
• Footprint approx. 70 m x 33 m
• Reinforced concrete structure with supporting brickwork

Our services

• Soil classification, geostatic calculations
• Subsoil investigation, foundation works consultancy
• Inspection of mine plans and elevations
• Mine inspection because the land is located within the Lower Rhine-Westphalia hard coal and ore mining region

Project

• Investigation of the sloping Friedrich shaft
• Depth 61 m
• The shaft was immediately adjacent to a public road

Our services

• Preparation of the investigation concept
• Supervision of works / expert support
• Evaluation of exploratory/investigative works
• Concluding report and documentation

Project

• New construction of 2-storey, full-basement residential property with a footprint of approx. 150 m²
• The property is situated close to the former mining site of the Witten coal mine (Geitling hard coal stratum)

Our services

• Investigation and assessment of the subsoil in accordance with DIN 4020
• Recommendations on foundations
• Geothermal report
• Assessment of drainage capacity
• Inspection of plans and elevations for mines
• Tender for investigation of mines and expert support and evaluation of the results from drillings
• Planning and tendering for in-filling of the former mine
• Support during construction

Project

• Constructing a residential facility with 16 semi-detached units on a former industrial site
• Total area 5,700 m²
• Measures for redevelopment of a former mining area
• Restoration of the subsoil

Our services

• Concept for demolitions works, reinstatement concept including on-site support during construction
• Investigation and assessment of the subsoil in accordance with DIN 4020
• Recommendations regarding foundations
• Investigation of inherited pollution
• Inspection of plans and elevations for mines at the Arnsberg district authorities
• Expert examination and report on in-filling of mining works

Project

• Hotel complex with 7 upper storeys in Essen City, covering an area of 4,000 m²
• Previous development was destroyed during WW2

Our services

• Examination of the subsoil
• Report on foundations for the new building, taking account of influences from mining
• Initial assessment of inherited pollution
• Inspection of plans and elevations for mines, risk assessment
• Support for investigative, infilling and compaction drilling to secure the empty chambers left over from mining

New construction of a residential facility,
Dachsweg, Dortmund

Developer

Kaefer GmbH, Bremerhaven

Download the project description
PDF, 112 KByte

Project

• New construction of a 3 ½ storey semi-detached house on a sloping site
• Site over a former mining works

Our services

• Inspection of plans and elevations for mines
• Risk assessment
• Tendering for investigative measures
• Expert monitoring of investigative drillings for shafts and mining chambers
• Assessment of the current safety of the site
• Expert monitoring of infilling and compaction works to fully secure the site

New construction of a dental-biomedical R&D centre( ZBZ) ,
Karl-Herrhausen-Str., Witten

Developer

ZBZ - Witten GmbH

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PDF, 161 KByte

Project

• New construction of a dental-biomedical R&D centre (ZBZ)
• 5-storey building comprising 4 round towers
• Given the sloping site, the cellar level was below the site surface level on the side to the road

Our services

• Assessment of subsoil
• Advice regarding foundations
• Percolation report
• Taking account of influences from mining

New construction of residential housing, Project Strontianitstraße, Ahlen-Vorhelm

Developer

Bendix, Ahlen

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PDF, 111 KByte

Project

• Planned development on an area covering 12,000m² in Ahlen-Vorhelm
• Site above a former vertical face for mining of strontianite
• Shown as an area at risk from mining in the spatial use plan

Our services

• Inspection of plans and elevations for mines
• Risk assessment
• Tendering for investigative measures
• Geotechnical recording of excavator prospecting works to determine the site of the course of strontianite
• Expert monitoring of investigative drillings for a shaft and mining chambers
• Assessment of the current safety of the site

Prometheus, Ruhr-Universität
Bochum

Developer

rubitec GmbH, Bochum

Download the project description
PDF, 143 KByte

Project

• Sinking two drill holes to a depth of 4,000 m
• Obtaining geothermal energy on the site of FH Bochum
• Size of drilling site 7,500 m²
• At a depth of around 1,000 m there are production caverns established in former mining chambers.

Our services

• Investigation of the subsoil, assessment of subsoil and advice on foundations for the drilling site
• Inspection of plans and elevations for mines
• Inspection of the archive of air protection facilities
• Risk assessment

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