Kefirnimada Kordhinta iyo Qiimaha
Kefirka ugu wanaagsan ee krah iyo maayinta aasaasiga ah ayaa siiya faa'iidooyin dhaqaanle aad u weyn oo ka dhigaya inay noqdaan xul ah si loo doorado naashaysiyo iyo maamulka mashruucaska ku arka midhaha saxda leh ee bilawga aasaasiga. Qudhmin krenka krah, kaarka ugu yar 70% ka qalabnka iskuulka, ayaa si fiican ka buuxiya khaladka guurida iyo helitaanka isticmaalka qiimi ah, jilicsan, iyo fagaareed si loo sameeyo. Mugga qalabkaas waxa uu kala bixiyaa khalad guurida laabta, ka qaadashada biyaha, iyo helitaanka in lagu guuro qaanso badan karta baraf, si kale haddaba in lagu dhergeliyo muddada mashruuc, ka saara khaladka aysaan lahayn. Kooxdayna laga sameeyo krah iyagoo isticmaalaya qiimi caadiga ah ee jilicsiinta, kadib marka la doonayo qiimi dheegtaran, ka saarista khaladka qiimaha, iyo kororimaadka kooxda naashaysiyo kahor inay sameeyaan shaqada. Jilicsinka kreh waxa uu kala saara taliska diginka, ka jeedinaya aasaasiga hore, ka saarina khaladka dib-u-habarka ka dib mashruuc. Sidaas daraaddeed, hababka digitaanka (trenchless) waxa uu noqdaan mid la heli karo krah sababo jilicsinkooda iyo khatarteedka khatarkooda, sidoo kale inay sameeyaan hoos jidkaha, jiidkaha reer, iyo aasaasiga muhiimka ah kale mana saarin dhibaatada. Hababka kala jaro krah ayaa ka saara in la baahan tahay shaqo gaar ah ama alaab gaar ah, si kale haddaba inay sameeyaan shaqo badan, ka saarina shaqsiin, iyo fursado kala badan ee khaladka shaqada. Xaqiijinta aamininta shaqada waxa loo wanaajiya sababo in ay tahay sidaas oo kala duwan, iyo hababka kala jaro caadiga ah, si kale haddaba inay ka saarto waqtiga tijaabinta, iyo inay hubiso in nidaamku shaqeeya si fiican. Horumarinta kala duwan ee krah waxa uu kala saara hababka caadiga ah ee jilicsiinta, sidoo kale inuu yeesho jilicsin si loo sameeyo shaqo gaar ah, ka saarina waqtiga horumarinta, iyo shaqada si fudud. Faaiidooyinka daaweynta ugu dambaysa waxa ay ku celiya in khaladka dib-u-eegista way yar yihiin sababo in krah ay leeyihiin iman la'aanta kiimikada iyo jilicsinka, ka saarina in la baahan yahay dib-u-eegista mararka qaar ama bedelka hore loo yaqaan oo kale ay leeyihiin. Mudda khasabka krah, kaarka ugu yar 50 sano, ayaa siiya fududid aad u weyn, iyo ka saaraysta khaladka daaweynta si joogto ah, ka dib marka loo eego midab kale oo baahna inay beddesho mararka qaar ama shaqo weyn.
