BIH Bau & Handels GmbH

Geotechnic, Tunnels & Underground Spaces

We believe that sustainable development in infrastructure and underground spaces is inevitable and is one of the pillars of the modern world. We strive to adapt infrastructure growth to environmental challenges.
We provide various services such as design, consulting and supervision on tunnels, underground spaces and deep excavations and foundations. We specialize in the monitoring of Infrastructure Projects (provide a comprehensive report of monitoring procedures of displacements and unusual settlements).
Our scope of activity includes the following:
  • Geology/Geotechnics
  • Tunnel boring machine (TBM) and conventional tunneling (NATM) in subway, urban tunnels, road tunnels, railway tunnels, and utility tunnels
  • Underground spaces
  • Civil structures
  • Route construction
  • Cavern constructions for the power industry
  • Water supply and disposal networks
  • Alignment design
  • Rehabilitation of infrastructures
  • Mechanical-Electrical design and ventilation for tunnels

Team Members

Dipl.-Ing. Aidin Eivazi Adli
Aidin is a graduate of the Montan University of Leoben - Austria, bringing more than 20 years of project manager, construction site manager, consultancy, and construction experience in urban tunnels, caverns, metro stations, shaft and deep foundation design (structural analyses), and seismic retrofitting and geotechnical investigation in 12 different countries. He is a member of ITA (International Tunneling and Underground Space Association), ISRM (International Society for Rock Mechanics), and OeGG (Austrian Society Geomechanics).
Dr. Arya Assadi Langroudi
Arya (BS Hons, MSc, PhD, FGS, SFHEA) is Associate Professor in Geotechnical Engineering at University of East London, Royal Society Visiting Scholar at Central University of Technology South Africa, Principal Investigator for the Royal Academy of Engineering, Director of Engineering at University of East London, Director of Emerging Geohazards Laboratory and chair of the international Nature-inspired Solutions for the Built Environment (NISE). He brings >15 years of design and independent consultancy experience in foundation engineering, earthworks, ground improvement, basement and environmental impact assessment.
Dipl.-Eng. Babak Mohammadalizadeh Rafie

Babak has more than 17 years of professional experience in civil engineering in the field of performing braced urban excavation, stabilization of  retaining walls such as nailing, anchoring and in-situ piles. Also, experience in the field of construction of tunnels, underground subway stations, offshore piling, injection of cutoff walls under the dams and injection to improve subgrades and track beds.

Reference Projects

Tunnel Chain Granitztal, Carenthia (Austria, April 2015 - January 2018)

The length of tunnel is about 6.1 km (double track railway tunnel in NATM/shotcrete lining method) a part of Austrian high-speed train network.
Tunnel is constructed in 3 parts:
  • Tunnel Deutsch Grutschen 2,5 km
  • Tunnel Langer Berg 2,9 km in hard rock (neogenic sediments: conglomerate and silt-sandstone and Permo-mesozoic: siltstone and fine sandstone)
  • 700 m Cut and Cover in soft soil, extreme geotechnical situation like lake sediments, called Granitztaler beds
In tunnel Langer Berg was the excavation encountered with unexpected swelling anhydrit layer in sulphate rock mass. That caused to adjustment of design and implementation during construction. Long term monitoring in this part is going on.

Baran building pit project (2008-09)

Foundations for new builds and  deep basement solutions
  • Top-down supported excavation
  • Excavation through troubled grounds
  • Submerged excavation
  • Excavation through artesian layers
  • 322,048 m² building space, 30 floor levels above the ground, 9 floor levels below the ground
  • 28 m vertical cut, 14.5m submerged
  • 12 m to adjacent 6-storey residential buildings
  • GW drops 1 to 2 m in every 10 m run perpendicular to project line, hence seepage
  • 18m of calcareous alluvium overlying clay overlaying cemented gravel
  • Soil nail system Plus active dewatering/drainage scheme
  • Image showing FE deterministic analysis for various hydraulic gradients & GWL

N1 building pit project (2009)

Deep basement solutions
  • Top-down supported excavation
  • Submerged excavation
  • Excavation through artesian layers
  • Excavation through troubled grounds
  • 21,450 m2 surface area
  • 30 m deep cut, no bench
  • 12,400 m2 of soil nailed wall
  • 2,900 m2 of king pile – CIP wall
  • LE - FE analysis
  • Confirmatory DE analysis using commercial code Flac 2D

ISOICO Dry Dock - Steel Complex (2004 - 08)

Static Pile load test to control tensile and compression capacity of driven piles and in-situ piles in coastal, structural and heavy industrial projects
Over 300 piles with various sizes (Diameter 40 ~200 cm)
  • The maximum load in the compressive test has been 1050 tons
  • The maximum load for the tensile test was 400 tons
  • Design to x2 working load

Retrofitting tests of 13 hospital buildings, seven bridges, and the central railway station (2008 - 09)

Retrofitting investigation of the existing buildings based on the earthquake spectrum and the required target for the building to reach a satisfactory level of performance and operation
  • The expected performance level for structures is defined based on many factors such as the age of the buildings, importance, urban location, and economic issues
  • Geotechnical works
  • Non-destructive testing
  • Testing the strength of the material

Ring foundation system for LPG tanks (2007)

Infrastructures, Tank farms - Jetty
  • [reporting to WEIR, UK] raft footings to support 3x45,000m³ Propane/Butane double wall tanks, prediction of total/differential settlements under working loads in 50 years’ time (SIGMA/W-PLAXIS)
  • Four exploratory boreholes per tank, 35 to 65m deep;
  • GWL from 8.6 to 9.2 mbgl
  • A layer of CORAL, 4.1-6 m think, overlaying a hard to vert hard clay and silty, followed by saturated very hard clay to the end of the boring
  • Stiffness determined through PLT, seismic (downhole) test, and pressuremeter (Menard)
  • Broad range of laboratory tests
  • Ring foundation

Wisma GP Hotel, Sabah project (2018)

Foundations for building extensions 
  • Wisma GP sub-structure integrity for future renovations and construction purposes
  • Existing 5-storey building 20 years of age,
  • Available architecture drawing but no structural drawing
  • Commissioned to:
    (i) comment on the state of the foundations
    (ii) Scopes to vertical expansion, from 5-storey, to 11-storey
  • Piled foundation
  • Liquifiable sand overlying active clayey loamy soils of moderate plasticity overlying Shale with silt inclusions and interbedded shale-sandstone
  • Design and construction of a rigid piled raft through micro-pile installation (self-drilling anchors), and sequenced removal of pile cap, CFA piling (6-12m deep), also staged compaction grouting (@70-250cm C/C @2-5bar, 3 passes) in summer within the top 0.6-0.9m subgrade

22-storey Hyatt Hotel Project, Kota Kinabalu, Sabah (2018-19)

Deep basement solutions 
  • Top-down supported excavation
  • Submerged excavation
  • Excavation through artesian layers
  • Excavation through troubled grounds
  • Secant piling and staged excavation
  • Bored piles Ø 1200 mm, 29 m long
  • Rock socketing
  • Design to x2 working load
  • Static pile load testing using YJACK
  • 11.3 MN working load, 22.60 MN test load stage 1, 28.25 MN test load stage 2

5-star hotel Project, Corobrik quarry, Bloemfontei (South Africa 2017-18)

Stabilisation of soil slopes
Coupled CFA piling - EK ionic treatment
  • Top-down supported excavation
  • Submerged excavation
  • Excavation through artesian layers
  • Excavation through troubled grounds
  • Discarded quarry since 1997
  • Filled with water through upward GW seepage
  • Dispersive soils with severe piping and erosion problem
  • Calcareous weathered mudstone of the Ecca Group, Karoo Supergroup
  • 2.8 km circumference, 50 m depth
Slope stabilisation for transition of site into
  • c.100 ha mixed-use development
  • 1500 residential flats overlooking the lake
  • Targeted coupled CFA piling - EK ionic treatment

Pedestrian bridge Project, London (UK 2021)

Infrastructures, Runways - Bridges
  • Hybrid Crane type Cable Stayed Bridge
  • RC Piled foundation in London Clay
  • RCC block to counterbalance the extra tension in cables; The anchor lock designed to lie next to the foundation
  • steel Truss deck designed for unsupported spans of 10m
  • Tension cables
  • Crane boom
  • View deck (+3m above deck level i.e., RC pier, crane boom intersection)

A487 to Pwll March Tunnel, Newgale (Wales 2017)

Stabilization of rock slopes - Rockbolt
  • Top-down supported excavation
  • Submerged excavation
  • Excavation through artesian layers
  • Excavation through troubled grounds    
  • Bearing fixed at 84 - 264°
  • The tunnel passes through layers of Argillaceous rocks, sandstone, and mudstone