La Grana Collector

Recovery of the public hydraulic domain in the Arroyo de las Flores stream.

The project of the sewerage collector in La Granja de San Ildefonso (Segovia) consisted of the construction of a subway infrastructure to improve drainage and water channeling in the Arroyo de las Flores area. The work was carried out with the use of an Hidroshield DN2500 shielddesigned to traverse abrasive granite terrain.

General project details

Location: La Granja de San Ildefonso, Segovia, Spain
Main objectiveRecovery of the hydraulic public domain through the canalization of the Arroyo de las Flores.
Geological conditionsAbrasive granite.
Technology usedHydroshield DN2500.
Total tunnel length: 170 meters.
Drilling sections:
- 100 meters on rock.
- 70 meters on rock.

Technical specifications

Nominal diameter: 2,500 mm.
Method usedExcavation with Hidroshield shield.
Digging face pressure control to guarantee stability in hard terrain.

Logistics and technical challenges

This project presented challenges due to the harsh terrain, which required the use of advanced technology and constant monitoring during excavation.

Project highlights

Excavation in abrasive granite terrainwith specialized tools to guarantee the efficiency of the process.
Optimization of the drainage systemimproving the channeling of the Arroyo de las Flores.
Use of Hidroshield technology to control excavation in high-strength soils.

Environmental and social impact

The sanitation collector in La Granja de San Ildefonso improves water management capacity in the area, ensuring an efficient and sustainable infrastructure.

Reduction of environmental impactThe system is based on controlled excavation and efficient water channeling.
Modern and sustainable infrastructuredesigned to optimize water flow and prevent erosion.
Improved drainage networkThe project will benefit the local community and reduce the risk of flooding.

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