SPAIN | CIVIL ENG. AND CONSTRUCTION
Structural and hydraulic parameter monitoring system
Udalaitz Tunnel
PROJECT OBJECTIVE
Structural monitoring
The project consisted of the development of the Udalaitz tunnel, with a total length of 3,185 m between KP 1+215 and 4+406. Of these, 1,020 m crossed a karstic aquifer in the Udalaitz hydrogeological subunit. The excavation was carried out almost entirely with the New Austrian Method (NATM).
The support systems, classified from ST-I to ST-V, included gunite and bolts (ST-I to ST-III); gunite, bolts and trusses (ST-IV); and micropile umbrellas together with gunite, bolts and trusses (ST-V).
The 1,020 m section near the Vitoria mouth crossed the karst aquifer and had a watertight section to prevent seepage into the tunnel.
Date of execution:
2017
Location:
Udalaitz, Spain.
Sector:
Civil Engineering and Construction
Client:
How we made it happen
Load testing
OUR CONTRIBUTION
Some of our products and services applied to this project
Service
Technology consulting
We advise on the best technological solution to apply according to the needs of each project. Learn more about our technology consulting.
Service
Infrastructure process monitoring
We obtained a continuous monitoring system for structural and hydraulic parameters. Learn more about our monitoring service.
RESULTS AND ACHIEVEMENTS
Reliable system
A system for continuous monitoring of structural and hydraulic parameters during the different load states was implemented, with real-time visualization of the data compared to predefined thresholds and control over the solenoid valves.
This system made it possible to regulate the water table affecting the lining, demonstrating reliability in parameter control and load management during the test. It also validated the project calculations in extreme scenarios , such as the possible failure of the tunneldrainage system.
7
states of variation of the water table
50m
above the tunnel key
OUR EXPERIENCE
