Dolenco Drain

Permanent Drainage Solution for Slope Stabilization Lining in Road Projects   For road projects in challenging terrains with water ingress in soil base, Dolenco Drain is a specialized solution for enhancing durability of concrete lining used for slope stabilization. A unique drainage mesh which is installed between shotcrete layers to form a monolithic slope - covering or supporting - layer which improves water management. Dolenco Drain is installed without anchors, which saves time, reducing initial costs, which is ideal for road projects where time is essential. Embedded within shotcrete layers, Dolenco Drain’s drainage channels effectively divert water, preventing water buildup and prevents the impact of hydrostatic pressure on the final facing or structural lining. This reduces risks associated with water pressure, including potential cracking and degradation over time, especially in high-rainfall or freeze-thaw conditions. Dolenco Drain is applied as a stand-alone solution or combined with strip drains placed behind the initial shotcrete layer. This configuration creates a dual drainage system, permanently preventing water pressure and protecting the final shotcrete lining from moisture-related deterioration, thus extending the lifespan of the slope support structure significantly. Being manufactured from 100% recyclable materials, Dolenco Drain is designed to support sustainable construction practices without sacrificing performance. The flexible design allows it to follow the contours of a wavy surface, accommodating irregular rock masses or soft soil slopes without additional surface leveling. This reduces the need for preparatory work and enables efficient water diversion across varied geological conditions.   #SlopeStabilization #CivilEngineering #RoadConstruction #DolencoDrain #WaterManagement #Shotcrete #SustainableInfrastructure

Space-Saving and Sustainable: The Dolenco Drain Solution for Tunnels Engineered for modern underground construction, Dolenco Drain is an innovative, slim drainage solution that reduces structural water pressure while minimizing the need for large installation spaces. With a thickness of just 14 mm, it’s ideal for both new builds and refurbishment projects, even under challenging wet conditions. Made from 100% recyclable materials with an impressive 120-year design life, Dolenco Drain represents a long-lasting and sustainable choice, effectively cutting maintenance costs and environmental impact. Key benefits include: ✔ Slim profile: Just 14 mm thick, saving valuable tunnel space. ✔ Monolithic structure: Achieves adhesion of shotcrete layered lining across 70% of the surface, creating a robust, integrated barrier. ✔ Simplified installation: Overlapping, anchor-free setup for faster, safer installation. ✔ Quick repair: Easy to refurbish after physical damage and potential blockage of the drainage space, keeping downtime minimal. ✔ Significant savings: Reduces construction costs by up to 40% and overall costs by around 55%. With its modular, monolithic design, Dolenco Drain is setting a new standard in efficiency, durability, and environmental responsibility for underground water management. #InfrastructureInnovation #SustainableConstruction #TunnelEngineering #DolencoDrain #Tunnelling #DrainageSolution

How do you improve the sustainability of shotcrete coatings for slope stabilization? Soil and rock slope stabilization issues is a significant part of civil engineering, traffic and industrial mining projects. The main problem which engineers face in designing and operating of slopes is ground stabilization due to geology, hydrogeology, soil and rock conditions, erosion, different climates, rainfall, humidity, freeze-thaw and snow conditions. Over the years, the use of shotcrete for slope stabilization has increased substantially. In today`s interesting article from Shotcrete magazine of American Shotcrete Association, Mike Ballou and Matthew Niermann are elaborating on their experience in using fibres in shotcrete for slope stabilisation. https://lnkd.in/dKmZ6Yca The creation of a layer of shotcrete lining prevents the free discharge of groundwater, which can lead to the accumulation of moisture behind the supporting layer of concrete. If shotcrete has high permeability and/or the groundwater pressure is significantly elevated, water may penetrate the shotcrete structure and this can lead to degradation of the cement matrix and loss of lining strength. A gradual decrease in the strength and integrity of concrete leads to corrosion of the reinforcement, which greatly reduces the durability of the stabilization solution. When including Dolenco Drain into the design, mounted between two layers of shotcrete or even directly onto the rock surface, and subsequently covered by a final shotcrete layer, Dolenco Drain permanently prevent water pressure on the shotcrete, prevent humidity in the final lining and increases longterm durability. #slopestabilization #sprayedconcrete #shotcrete #waterproofing #infrastructure #sustainability

How do you optimise secant pile design durability?   Secant piles are an engineering method used to create retaining walls and deep foundations as a support temporary or permanent excavations in soft and water-saturated soil. This technique involves drilling overlapping concrete piles (with or without reinforcement) into the ground, providing both structural support and groundwater control. Ideal for projects in urban settings, secant piles are commonly employed in basement excavations, tunneling, and other civil engineering applications. However, while secant piles are effective in reducing water ingress, risks related to impermeability can arise. If not designed or constructed properly - such as microcracks in injection concrete due to hardening and the influence of active soil and water pressure during excavation, issues in the area of overlapping due to deviations in the verticality of the piles, or the distance of the groundwater level to the deepest excavation - these piles may fail to create a watertight barrier, leading to seepage, leaking, or even flooding and structural instability of the retaining construction. This can result in uncomfortable use of underground space and costly repairs through injection and ongoing maintenance. To mitigate these risks, thorough geotechnical investigations and meticulous construction and waterproofing practices are essential. However, it is practically impossible to ensure 100% water resistance of secant pile walls in water-saturated soils using conventional waterproofing solutions. To create the optimal design for secant pile walls in water-saturated soils Dolenco Drain is placed between the secant piles and the final shotcrete layer. Thus permanently prevent water pressure on the shotcrete and facilitate the application of a spray membrane, if included in the design. Preventing or minimizing post-injections and repairs, Dolenco Drain is quick and simple to install and comprises a safe and permanent solution. It prevents water pressure and leaking, keeping the underground space dry, and once installed, Dolenco Drain does not have a limited lifespan, and thus it improves the secant pile walls durability. #secantpile #sprayedconcrete #shotcrete #waterproofing #infrastructure

At Dolenco Drain, we continuously keep ourselves updated on the latest knowledge, technology, and research in tunneling. We do this, among other things, by regularly attending conferences around the world🌍 On October 8-9, we will be heading to the UK's largest tunneling conference and exhibition BTS 2024 organised by British Tunnelling Society. BTS 2024 Conference and Exhibition is a meeting place for everyone involved in the design, construction, and operation/maintenance of today's underground infrastructure. Johnny Poulsen and Kseniya Onopko are looking forward to the event to see you at booth #20🤞🏻 https://lnkd.in/dWAsAXeA #infrastructure #tunnelling #BTS2024 #BritishTunnellingSociety #undergroundconstruction #sprayedconcrete #shotcrete #waterproofing

Congratulations to Hatch and everyone involved with the delivery of a succesfull Réseau Express Métropolitain Project and with the Top Project Award for 2024 in the Megaprojects category from FIDIC - International Federation of Consulting Engineers👏👏👏. We are happy to have made a small contribution with Dolenco Drain to secure the spray membrane against incoming water, so work could proceed as planned, without further delays from repairs. Read more https://lnkd.in/gguz_8sK

Shotcrete as a solution to a wide range of construction problems. Since 1995, Land Transport Authority (LTA) Singapore has been working on expanding the underground rail and road transport systems. The development has largely relied on the use of Sprayed Concrete Lining (SCL), which has been a key engineering solution to the many challenges typically encountered in tunneling projects within an urban environment. In this insightful article from World Tunnel Congress 2024 (WTC 2024), the authors Alvin Sim, Kin Boon Chang, Massimo Marotta, Chee Keong Poh & Mohd Mohiadeen evaluate how modern methods like SCL can be applied to tunneling projects in urban settings. SCL is a highly versatile and adaptable tunneling method that, if designed and applied correctly, can be used to address a wide range of construction issues in an urban environment. ☝By including Dolenco Drain in the SCL (Sprayed Concrete Lining) method, you enhance the structure and effectively address a broader range of construction issues by permanently preventing water pressure behind the inner lining. It is the only solution capable of doing this using a thin layer of shotcrete. Dive into the article for a comprehensive assessment of these critical factors⬇ #TunnelConstruction #EngineeringExcellence #DolencoDrain #Shotcrete #DoubleShellLining #CivilEngineering #SCL #Sprayedconcrete

Probably the most durable solution on the market Dolenco Drain is designed to permanently prevent water pressure, there by ensuring a longer lifespan of the structure and lower maintenance costs. The low life cycle costs when using Dolenco Drain make the solution cost-effective, and it improves tunnel durability. Once installed, the solution is permanent, with lifespan over 120 years, which also represents a significant reduction in energy consumption compared to alternative solutions on the market. So, what makes the LCC (life cycle costs) so low with Dolenco Drain? ☂It is a quick and simple solution against pressure and leakage, keeping the tunnels dry. 🥽Inspection is simple and non-destructive. ⛏Repair after physical damage is safe and quick, requiring only short downtime of the tunnel. ⚓The drainage elements are installed without anchors. 👷🏻The slim and monolithic design can be installed even when very little space is available. 🌱The design is made from recycled material and can be recycled again.   Contact us to find out how we can help optimize your project design: Phone: +45 4752 4752 E-mail: info@dolencodrain.com #sprayedconcrete #shotcrete #waterproofing #infrastructure #tunnelling #lining #liquidmembrane

How to optimize tunnel design with Dolenco Drain, permanently preventing water pressure. Make slim structures, save concrete, injection work and maintenance. If you did not get a chance to meet us in person in conferences and company presentations, this is your chance: Join our webinar 7. August at 10 am Mexico City time, 6 pm Copenhagen time. Ask questions and get new ideas. With simultaneous spanish translation. Happy to see you!

Geotechnical Design Requirements for NATM The New Austrian Tunneling Method (NATM) relies on the surrounding rock mass to act as the primary load-carrying structure for tunnel stability. Establishing the characteristic ground-support reaction curve is crucial for optimizing this load-carrying capacity. Below are the essential geotechnical design requirements: Strength of the Ground: Tensile, Shear, and Compressive Strength: These properties determine how the ground material will react to stress and strain during and after excavation. Stand-up Time: The time the excavated section of the tunnel can remain stable without support is critical for planning the sequence and timing of support installation. Pore Water and Drain Conditions: Understanding groundwater conditions is essential to prevent water ingress, which can weaken the rock mass and cause instability. Homogeneity and Non-linearity of the Ground: Variations in rock or soil types, and their non-linear behavior under stress, need to be accounted for in the design. Time-reliance or Creep Behavior: The long-term deformation characteristics of the rock mass, known as creep, must be considered, particularly in soft rock or soil. Major Joint-Discontinuities: The presence of joints, faults, and other discontinuities can significantly impact the stability of the tunnel and must be mapped and analyzed. Earth Pressure at Rest: The lateral pressure exerted by the ground at rest influences the design of support systems and the overall tunnel stability. Magnitude of Overburden Pressure: The weight of the material above the tunnel (overburden) affects the stress distribution and the necessary support requirements. Additional Geotechnical Design Parameters: For a comprehensive preliminary design of excavation patterns and geometry, the following parameters should also be selected appropriately: Modulus of Elasticity: Indicates the rock mass's ability to deform elastically. Poisson’s Ratio: Describes the ratio of lateral strain to axial strain in the rock mass. Cohesion and Angle of Internal Friction: Critical for understanding the shear strength of the ground. Density of the Ground: Influences the overburden pressure and overall load on the tunnel. Rock Mass Rating (RMR) and Q-System: Classification systems used to assess the quality and stability of the rock mass. The effectiveness of NATM depends on a thorough understanding of these geotechnical properties. Properly assessing and incorporating these factors into the design ensures that the ground-support reaction curve is optimized, providing a stable and secure tunnel environment. By considering these comprehensive geotechnical design requirements, engineers can effectively implement NATM in diverse geological conditions, ensuring safety and efficiency in tunnel construction. Sources Rock Mechanics and Rock Engineering International Journal of Rock Mechanics and Mining Sciences TunnelTalk #NATM #TUNNEL