Proper monitoring system needed for tunnels
The country has the possibility of construction of road connectivity through underground space, but a proper monitoring system and stable underground structures are the must.
The monitoring systems also need to prevent damage to existing structures and utilities.
During the two days training session on “Control and monitoring of construction of tunnels and underground space” last Tuesday, Klaus Rabensteiner, who was a resource person for the training said that while tunneling, monitoring is an essential part to make good structure as building tunnel in material like rock and soil.
He said that we do not know everything in advance, so we need to monitor properly during construction in order to compare the situation with our design and to optimize everything.
“It is a tool for safe construction of the tun- nels.”
Klaus Rabensteiner said that while tunneling without safety measures is risky to the workers as well as to the environment. He said that with safety measure, we can influence construction process, length of the excavation and steep of the excavation and also we can influence the support system.
The risk associated with the tunneling, he said that there are chances of collapse of tunnel and this can cost lots of money to repair and even risk to the workers. “We must do what we can do to avoid it.”
In order to avoid such incidences, Klaus Rabensteiner said that need to have good process for the whole project; we need good investigation prior to the project with drilling and laboratory test and as well geo-physical testing.
Meanwhile, the tunneling process needs well monitoring system as construction of tunnels are done in the underground space.
According to the press release from the Druk Green Power Corporation, the training was mainly to train and equip participants on equipment and typical applications, and monitoring during investigation and study process, conventional tunneling, methods in mechanized (TBM) tunneling, interpretation of monitoring data, role of monitoring, risk management, contractual aspects, monitoring a tunnel in a landslide area, future development in monitoring, and case studies.
During the training it also highlighted on the methods and examples of monitoring of tunnels and underground space, and the effects of tunneling to surrounding ground.
The press release states that monitoring allows the tunnels design and a construction procedure to be adjustable and validated as tunneling takes place.
Lyonchhen Dasho Tshering Tobgay at the closing ceremony said that this training showcases the seriousness and enthusiasm The Druk Green Power Corporation Limited and the entire engineering fraternity has.
“This is the turning point where we are learning to design our own tunnels. We are starting to build our own tunnels,”
He added that as we celebrate ability today with the training in tunneling and underground spaces which would even work to ease the transport and traffic; and connect our valleys.
He said that we must aim high and urged the International Tunnel Association to send our Bhutanese engineers as trainers so that ‘we can operate at the best’.
Lyonchhen spoke on the essence of tunnels in Bhutan, with the example of connecting Paro, Wangdue, Punakha and Haa with tunnels to Thimphu. He explained that tunnels connecting them would mean a greater Thimphu with four absolutely stunning different valleys of varying altitudes, flora and fauna.
Meanwhile, Bhutan became a member of the International Tunneling and Underground Space Association (ITAAITES) at its 39th General Assembly in 2013 at Geneva, Switzerland. As per the ITACET Foundation charter, the member nations have agreed to conduct a training every two years.
Lyonchhen congratulated the 93 participants, Druk Green Power Corporation Limited and partners for contributing invaluable essence and training to the engineers. “This training will add immeasurably to our capacity,” he added.
The two days ‘Control and Monitoring of construction of tunnels & underground space’ was organised by DGPC with support from PHPA-1, PHPA-2, MHPA, THyEL, KHEL, CDCL, HTC and Sandvik Asia Private Limited with participants from hydropower projects, relevant ministries and other stakeholders.
Lyonchhen Dasho Tshering Tobgay said that this training showcases the seriousness and enthusiasm the Druk Green Power Corporation Limited and the entire engineering fraternity has.