What role do tunnels play in water supply and desalination systems?
Tunnels play an essential role in water supply and desalination systems, enabling the efficient and efficient transport of water from one place to another.
Drainage for dams
Eurohinca (Europea de Hincas Teledirigidas, S.A.), Trenchless specialist since 1996 - 14 TBMs and >120 km executed.
We run dam spillways and conduits associated with microtunneling (MTBM), segment tunnel, vertical wells y HDD — precise layout, pressure and leak testing, and minimal impact on civil engineering work.
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Dam drains: How do we ensure water safety?
At Eurohinca, we specialize in the construction of drainage channels for dams, ensuring precise flow control and the structural stability of the project. Thanks to our experience in river crossings y gas pipeline tunnels, we implement solutions that combine safety, durability, and efficiency in every hydraulic project.
Dam spillways: Technology for safe water management
Our systems incorporate methods of excavation using tunnel boring machines and trenchless techniques, reducing environmental impact and optimizing timelines. The experience gained in urban supply systems y drainage works It allows us to offer reliable solutions tailored to each environment.
Service Specifications for Dam Outlets and Water Conveyance Channels
Dam spillways, discharge tunnels, and associated underground conduits require construction technologies that ensure high precision and minimal impact on the dam structure and its surroundings. Trenchless methods allow for the construction of tunnels and pipelines with geometric control, stable tunnel faces, and strict compliance with hydraulic regulations. This service is defined by the following technical parameters:
• Main applications: Bottom drainage tunnels, auxiliary conduits, hydraulic bypasses, drainage galleries, relief conduits, underground crossings beneath abutments or foundations, and connections to valve chambers or sluice gates.
• Construction methods used: Remote-controlled microtunneling, driving steel or concrete pipes, Direct Pipe® for pressure pipelines, and mechanized tunneling in rock when conditions require it. The choice is based on geotechnical conditions, water pressure, and the dam’s location.
• Ground Conditions and Stability: Alluvial deposits, mixed soils, or rock around the reservoir or abutment. Permeability, fracturing, the water table, hydraulic gradients, and potential preferential flow paths are taken into account.
• Structural Safety Requirements: The work must avoid placing additional loads on the dam, interfering with its foundations, or altering the seepage regime. Elevations, depths, and alignments are designed in coordination with the dam engineering team.
• Diameters and working pressures: Steel or concrete pipes designed to withstand the high hydraulic pressures associated with bottom drainage or emergency operations. In accessible tunnels, segmental linings or specific solutions for hydraulic stresses are used.
• Typical section lengths: From short crossings under adjacent structures to tunnels several tens or hundreds of meters long to connect valve chambers, drains, or downstream discharge points.
• Civil works requirements: Tunnel portals and reception chambers located outside the dam's structural influence zone, safe access points, work platforms, a slurry plant, ventilation, and areas for handling steel pipes or lining elements.
• Pressure control and front stability: In saturated soil or where the water table is high, closed shields (EPB or slurry) are used; in rock, specialized drill heads are used to ensure stability and minimize vibrations.
• Quality Control and Regulations: Continuous monitoring of thrust, torque, face pressure, alignment, and excavated volume. Leak testing, CCTV inspection, geometric control, and as-built documentation in accordance with hydraulic regulations and the requirements of the managing agency.
• Safety and Operation: Enhanced HSE protocols in the vicinity of dams, atmospheric monitoring, safe access to wells, pumping management, and ensuring that construction does not affect dam operations or the safety of the infrastructure.
What they think of us
International Experience
Projects around the world
Our international experience includes drainage projects in complex environments, where we tailor our engineering solutions to specific technical and environmental conditions.
You can find out more in the works performed.
Dam Spills: Rapid Response
What Are Dam Spillways?
Dam spillways are structures associated with conduits connected to the water management and drainage at dams, where the design and construction are often influenced by the surrounding environment and by operational and permitting requirements. This type of work may involve submerged applications when work is being performed in an underwater environment.
When to use
They are used when a project requires work to be performed on or intervention in a section associated with a dam that has access limitations, construction restrictions, and requirements set by the owner/operator. For other types of crossings, it may be helpful to review river and watercourse crossings.
Minimum information for a first review
Approximate location and objective (what you want to install or resolve).
Sketch or plan with preliminary layout and start/end points.
Known environmental restrictions (access, occupancy, construction limitations).
Requirements for the owner/operator (if applicable) and any available documentation.
What you get after an initial review
Identification of main conditioning factors.
Short list of missing information (if any) and recommended next steps.
If you want to move forward with a query, you can do so from Contact.
Request for information
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News that may interest you
On the blog of Eurohinca News We share success stories, technical advances, and best practices in hydraulic and underground engineering projects.
How is the construction of submarine outfalls carried out?
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What is a submarine outfall?
Submarine outfalls are an essential part of the sewerage and water management infrastructure in many urban areas.
Frequently asked questions about dam spillways
In the section on frequent questions We answer questions about the materials, maintenance, and durability of spillways, as well as their role in dam safety.
What is a weir outlet and what is its main function?
A dam outlet is a system of pipes or channels designed to control and direct the flow of water from a dam. Its main function is to allow the safe evacuation of water stored in the dam, preventing overflows and managing excess water, especially during heavy rains or snowmelt.
Why is proper construction of spillways in a dam important?
Adequate drainage construction is crucial to ensure the security. y efficiency of the dam. Inadequate design can lead to problems such as overtopping, soil erosion, and structural damage. Well-constructed spillways ensure a controlled flow of water and minimize the risk of failure of the dam structure.
What materials are used in the construction of dam spillways?
Dam spillways are constructed using durable and resistant materials, such as polyethylene pipes, reinforced concrete y stainless steel. These materials are designed to withstand water pressure and extreme environmental conditions, ensuring long life and reliable performance.
How is the installation of a dam outlet carried out?
The installation of a weir drain generally follows these steps:
- Planning and designSite evaluation and dewatering system design.
- ExcavationPreparation of the ground for the laying of pipes or channels.
- ConstructionInstallation of drainage pipes or structures and connection to the dam system.
- Tests and adjustmentsVerification of system operation and necessary adjustments.
- Site rehabilitationFill and restoration of the land around the drainage.
What kind of maintenance do dam drains require?
Dam drains require periodic maintenance to ensure proper operation. This includes:
- Regular inspectionsTo detect signs of wear or damage.
- CleaningRemoval of sediments and obstructions.
- Functional testsVerification of the evacuation capacity and adjustments if necessary.
- Repairs: Fixing of any damage detected during inspections.
What measures are taken to ensure the durability of dam drains?
Solve your doubts in our section of frequent questions.
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