Proper mon­i­tor­ing sys­tem needed for tun­nels

Bhutan Times - - Home - Sonam Pen­jor

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.

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