Izinto ezilungileyo kunye nembali yokulungiswa kweCIPPumbhobho

Ubuchwephesha bokuphekuza be-CIPP (unyangelwe kwindawo yombhobho) bunoncedo olulandelayo:

(1) Ixesha elifutshane lokwakha: Kuthatha kuphela malunga nosuku olu-1 ukusuka ekusetyenzweni kwemathiriyeli yelinen ukuya ekulungisweni, ukuguqulwa, ukufudumeza, kunye nokunyangwa kwesiza sokwakha.

(2) Isixhobo sithatha indawo encinci: kuphela iibhoyili ezincinci kunye neepompo ezijikelezayo zamanzi ashushu ezifunekayo, kwaye indawo yendlela ayibalulekanga ngexesha lokwakha, ingxolo iphantsi, kwaye impembelelo kwindlela yokuhamba kwendlela incinci.

(3) Umbhobho we-lining uhlala uqinile kwaye usebenza: umbhobho we-lining unenzuzo yokumelana nokugqwala kwaye unxibe ukuxhathisa.Izinto eziphathekayo zilungile, kwaye zinokusombulula ngokupheleleyo ingxaki yokungena kwamanzi aphantsi komhlaba kube kanye.Umbhobho unelahleko encinci yendawo enqamlezileyo, indawo egudileyo, kunye nokunciphisa ukungqubana kwamanzi (i-coefficient ye-friction iyancipha ukusuka kwi-0.013 ukuya kwi-0.010), ephucula umthamo wokuhamba kombhobho.

(4) ukulondoloza okusingqongileyo nokulondoloza ubuncwane: akukho kugrunjwa kwendlela, akukho nkunkuma, akukho ngxinano yezithuthi.

Indlela yokuguqula i-CIPP yaqanjwa e-United Kingdom ngeminyaka yoo-1970 yaza yaqalisa ukusetyenziswa eYurophu nase-United States.Ngo-1983, iziko lophando lwamanzi laseBritani i-WRC (iziko lophando lwamanzi) lakhupha imigangatho yobugcisa yokulungiswa kwesebe kunye nokuhlaziywa kwemibhobho engaphantsi komhlaba kwindawo ephezulu yehlabathi.

Iziko leSizwe loVavanyo lweMathiriyeli lase-United States liqulunqe laze labhengeza iinkcukacha zobugcisa bolwakhiwo lolungiso lwemibhobho engenamasebe kunye nenkcazo ye-atm yoyilo lwesakhiwo ngo-1988, oluyilwa nolawulo lolwakhiwo lobuchwephesha.Ukususela ngo-1990, iteknoloji ye-CIPP isetyenziswe ngokubanzi kwihlabathi jikelele ngenxa yexabiso eliphantsi kunye nefuthe elincinci kwi-traffic.Thabatha iJapan njengomzekelo.Phakathi kweekhilomitha ezimalunga ne-1,500 zemibhobho eye yalungiswa kusetyenziswa ubuchwepheshe obungenamasebe ukususela ngo-1990, ngaphezu kwe-85% yobude bubonke iye yalungiswa kusetyenziswa ubuchwepheshe be-CIPP.Itekhnoloji yendlela yokubhukuqa yeCIPP ikhulile kakhulu.Izinto eziphathekayo kufuneka zinikwe ingqwalasela ephezulu ukuba sisebenzisa umbhobho wensimbi ukubonelela ngamanzi.Kungakhathaliseki ukuba uthenge umbhobho wensimbi ongenamthungo okanye we-ERW, kufuneka ukhangele ukuba izinto zokuqala zenziwe ngombhobho wensimbi.