Tunnelling

Modern tunnelling technologies are required to address many of today’s municipal challenges including stormwater collection, combined sewer separation and flood protection. The science behind these technologies involves an understanding of several overarching engineering disciplines including municipal engineering, geotechnical engineering, structural engineering, hydrologic/hydraulic engineering, and hydrogeology. KGS Group’s interdisciplinary tunneling group provides a complete suite of services to address the unique challenges of each tunneling project. Our services include:

• district wide hydraulic/hydrologic assessment and design
• geotechnical and groundwater investigations
• selection of tunnelling technique (with consideration of soil/rock conditions, groundwater conditions, pipe diameter, drive length, alignment and curvature, laydown area, and construction timelines). Tunneling techniques include:
  • conventional tunnelling
  • pipe jacking
  • microtunnelling
• preparation of geotechnical baseline reports
• evaluation of utility conflicts and development of crossing options
• analysis of anticipated settlement and impacts on utilities, structures and other infrastructure
• structural assessments of adjacent infrastructure (to tunnelling alignment)
• risk and constructability assessments
• identification of construction laydown requirements
• procurement strategies to ensure qualified contractors
• public engagement to address long construction timelines
• contract administration and resident inspection services (all disciplines)