Tau kawg, nws yog me dua qhov chaw ntawm lub tsev pheeb suab hauv qab los yog muaj ntau ntau cov pob zeb riprap nyob hauv qab los ntxuav. Qhov xwm txheej no yog qhov nyuaj thiab yuav tsum tau hloov pauv raws li qhov xwm txheej ntawm thaj chaw nyob rau lub sijhawm ntawd.
a.Yog tias hauv qab tsis sib npaug thiab tsis muaj cov ntaub pua tsev tuab, nws yooj yim rau puncture cov nuj nqis phem hauv qab. Feem ntau, koj tuaj yeem pom cov nyom tuag lossis nplooj kom kis tau rau hauv qab thiab sau nws.
b.Yog tias thaj chaw nyob me me dhau lawm thiab tsis tuaj yeem ntxuav tau, tsis muaj txoj hauv kev los ua. Tib txoj kev uas yuav ua tau yog nthuav tawm lub tsev pheeb suab ntaub thiab pw qhov twg koj xav tau. Qhov tseem ceeb yog tsis txhob ncua lub hauv qab ntawm lub tsev pheeb suab kom tsis txhob tsoo cov ntaub hauv qab.
c.Qhov xwm txheej no tshwj xeeb heev. Muaj ib zaug, kuv mus pw saum ib lub roob. Kuv tshawb nrhiav ib ncig thiab pom ib thaj av tiaj tus. Nyob rau hauv nruab nrab, ib lub pob zeb loj protruded, thiab nrog ib rab riam, nws coj hauv paus hauv qab. Kuv pab tsis tau tab sis pw tsaug zog. Obviously, yog tias koj nias lub tsev pheeb suab ncaj qha mus rau lub pob zeb, daim ntaub dai tuaj yeem tawg tau yooj yim.
Txoj kev siv yog kom nruj lub tsev pheeb suab ntaub kom ntau li ntau tau thaum txhawb lub tsev pheeb suab ntaub. Koj tuaj yeem pom ob peb lub pob zeb los nias lub tsev pheeb suab ncej kom nws khoov tau dav dua. Yog li ntawd, daim ntaub nyob rau hauv qab ntawm lub tsev pheebsuab yog tsis stretched xoob thiab yuav tsis vau nruj nreem thaum nias rau ntawm lub pob zeb hauv qab no.
Thaum ntawd, thaum kuv pw nrog kuv cov phooj ywg, cov pob zeb tau muab tso rau hauv nruab nrab, thiab ob leeg pw ib sab. Tau kawg, yog tias qhov curvature loj dhau rau kev ntshai ntawm kev tawg lub tsev pheeb suab ncej, koj tuaj yeem hloov nws nrog cov ceg zoo li saum toj no.
