• High Speed Mining in Rich Water Boulder Geology in Chengdu, China
• Break-Through under Historic City of Istanbul, Turkey

• In January 2015, the Lendlease Engineering Bouygues Construction Australia joint venture was awarded the contract for the design and construction of the NorthConnex project in Sydney, the deepest road tunnel in the Southern Hemisphere
• As elevated horizontal stress beyond a certain depth is a well-known phenomenon in Sydney Sandstone, the task of constructing the deepest tunnel in the region from the conceptual stage to the execution of the works has been unique
• The paper reviews how the key tunnelling parameters have been defined and translated into design assumptions. The design and construction methodologies will be explained, in particular with regard to the specific challenges associated with elevated horizontal stresses during excavation and support installation

• Since their genesis at the Paris RER Metro in 1964, Earth Pressure Balance machines have been the generalists of the TBM world, able to excavate a wide swath of geologic conditions. Their applications are becoming even more wide-reaching as the design evolves and more tunnels are being built in mixed ground conditions
• Hybrid-type Crossover machines are edging TBMs into new territory by employing design elements from both EPB and Hard Rock Single Shield Machines
• Where multiple machine types might have once been used for different sections of geology, a hybrid, or Crossover, EPB/rock machine can excavate an entire tunnel in vastly different conditions
• The machine type is particularly useful in fractured and faulted weak rock where clay inseams and sections of soft ground may be present
• New designs are making this versatile take on tunnelling more efficient, even at larger diameters of 12 meters or more
• This presentation will explore modern trends in Crossover tunneling through mixed ground conditions, with case study examples from the U.S., Mexico, India, and more

• Outlining of non-circular excavation techniques development of TBM
• Features of non-circular excavation techniques
• Innovative equipment and application
• Future trend of non-circular excavation techniques

Until recently, all rail tunnels in Norway were excavated using drill & blast technology. The Follo Line project is a new 22 kilometers long double track rail line that is currently under construction between Oslo Central Station and Ski. Four double shield hard rock TBMs with an excavation diameter of 9.96 meters excavate a total of about 35 kilometers of predominantly Precambrian gneisses with banding and lenses of amphibolite and pegmatite. Basis of the tunnelling concept is on using four TBMs, two of each operating in opposite directions from two access tunnels that are located at about midpoint of the alignment in a remote, rural location. When finished, the tunnel will be Norway’s longest and largest rail tunnel to date. The paper lights up the project challenges in particular the abrasive and strong rock mass, the large diameter in combination with the possible risk of high water pressures (12 bar) that require a well-adapted TBM concept.

• Specialist Tunnel Excavation- Turnkey Contracting Capability & Tesmec JV Partnership
• Tesmec S.p.A- Range of Surface Miners and rock trenchers
• Grydale scrubber systems & partnership with STE

The client has an significant role in health and safety outcomes for major projects. This presentation will outline the role of the client in delivering positive health outcomes for tunnel workers. Tunnelling will begin on Sydney Metro City & Southwest later this year, with other projects in Sydney, including Sydney Metro West also expected to include tunnelling.

Genex Power is developing a renewable energy hub west of Cairns from the infrastructure left behind at the closed Kidston gold mine. The project is a global first, it integrates Solar, Pumped Storage Hydro and Wind to deliver base load, renewable energy 24/7.