Installation of drainage piping at Jarosa Dam

Eurohinca has carried out a project for the installation of drainage piping at Jarosa DamThis is a reservoir of great importance for water regulation in the area. The intervention was carried out in a technically demanding environment, with the dam completely full of water and an outlet point at 35 meters deep. For this purpose, the Hydroshield DN800 tunnel boring machineThe new system guarantees precise and safe excavation.

Location and context of the project

The project was developed in the Jarosa DamThe dam is a key infrastructure for water supply and flow control in the region. The purpose of the work was to install a subway conduit that would allow the controlled evacuation of water from the bottom of the reservoir, optimizing its operation without compromising the structural stability of the dam.

Characteristics of the work

Construction method: Hydroshield DN800 remote-controlled thruster
Depth of the outlet: 35 meters below water level
Type of dam: Concrete
Geology of the terrain: Rock and compact formations
Environment: Hydraulic infrastructure with access restrictions and high precision requirements

Technical challenges

The main challenge of this project was the execution of the pile-driving in an environment that was completely submergedThe borehole had to ensure that the borehole could be drilled in the same direction as the pipeline, where any deviation in the trajectory could jeopardize the operation of the pipeline. The borehole had to guarantee the total impermeability to prevent unwanted seepage and ensure the stability of the surrounding soil.

Another challenge was the installation logisticsThe equipment and materials had to be transported and operated in an area of difficult access, with structural limitations for heavy machinery.

Solutions implemented

To meet the challenges of the project, Eurohinca implemented the following strategies:
✔️ Use of Hydroshield DN800 tunnel boring machinespecially designed for excavations in high-pressure conditions and submerged environments.
✔️ High-precision trajectory control systemsensuring the exact alignment of the drainage duct.
✔️ Advanced sealing methodsThe waterproofing of the tunnel and the avoidance of uncontrolled seepage.
✔️ Optimized logistics planningThe system allows the mobilization of equipment and materials in an environment with access restrictions.

Results and benefits

The project was successfully completed, allowing the installation of the drainage conduit without affecting the dam structure or its operational capacity. The application of advanced technologies allowed the excavation of the safe, accurate and efficientoptimizing the flow control of the Jarosa dam.

This project demonstrates that the remote-controlled pile driving is an effective solution for the modernization of hydraulic infrastructuresThis allows the improvement of evacuation systems in dams and reservoirs without affecting their operability.

References of executed works

In Eurohinca we are specialists in the execution of tunnels for pipelines with tunnel boring machines. Since its foundation in 1996 Eurohinca has executed different types of works:

International Experience