Tunnelling
Ground Control
In order for construction, renovation and tunneling to advance, the ground has to meet the needs of the project design. Ground suitability is an extremely important component of any underground project, and that is where Minova can provide the support required.  Minova offers a full line of ready-to-use cementitious grouts, chemical grouts, and chemical resins. Proven performance, reliability and quality manufacturing ensure that these solutions are effective and economical. Minova’s technical team can support these solutions on-site with training, support and consultation for the best approach to the problem.
Engineering Challenges
- Ground Consolidation and Stabilisation – solutions designed to ensure fast, effective control of fractured ground and unstable conditions.
- Soil Stabilisation – a complete range of innovative injection solutions for controlling high-mobility soils and sands while maintaining environmental quality and safety.
- Water Ingress – chemical and cementitious grouts designed to resolve nuisance water, stop high-volume water intrusion, and improvement of water control issues.
Cavity Filling
Minova offers solutions that can provide fast, economical and durable results when faced with a common challenge: Void Filling. Encountering voids in construction is a problem, and Minova has two innovative ways to fix unplanned or unknown voids while tunneling, drilling shafts, and controlling subsidence of structures. Depending on site conditions, access, and urgency, Minova is a partner in Void Filling with technologies that are innovative, proven and safe. Whether large or small, voids and cavities in underground construction can cause schedule delays, safety challenges and production issues.
Engineering Challenges
- Poly-Urea Silicate based technologies that provide consistent, predictable and safe results with an emphasis on speed and difficult access to the void.
- Foaming Cement technologies that can be pumped long distances, provide immediate results, and offer speed and ease of installation.
- Thixotropic Cementitious grouts that provide strength, durability and cost reduction while enhancing safety.
Water Control
Minova has a complete set of solutions for water control. Water-related problems take many forms, including nuisance seepage in tunnels, active high volume leaks in shafts and tunnels, saturated soils and sands, and invasive intrusion into assets and structures including around shafts, tunnels, stations and foundations. Minova has created a full menu of solutions to solve problems when encountering water in advance of, during, or after construction has been completed.
Engineering Challenges
- Single and dual-component polyurethane resins for water-stopping in low volume or high volume water ingress with high pressures.
- Dual-component poly-urea silicate resins that are non-foaming for grouting to stop water, repair ground in underwater conditions, and to enhance safety in certain conditions.
- Environmentally friendly mineral grouts including colloidal silica and sodium silicate technologies that provide ultra-dry tunnels, shafts and improve soil stability.
- Acrylic (acrylate) grout solutions for mitigating and stopping nuisance water intrusion, soil stabilisation and permanent water protection around underground infrastructure.
- Admixtures to enhance the performance of OPC and LC Grouts to provide stability and anti-washout performance to strengthen grout and reduce waste/loss of grout.
- Micro-cement technologies to improve the ground conditions when pre-excavation grouting and to improve ground around shafts and tunnels.
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Our experts work closely with you to understand your unique needs and provide hands-on guidance — from first consultation to project completion.