Kev ua haujlwm ntawm vuam chambered pos ntawm cov yeeb nkab lub cev yog los tiv thaiv kev nkag ntawm cov xuab zeb lossis lwm yam khoom los ntawm kev thaiv lub qhov grouting.

Hlau paj yeeb nkab yog txheej txheem txheej txheem nyob rau hauv lub tunneling thiab kev tsim kho txheej txheem ntawm txoj kab nqes txhawb kev tswj qhov project. Nws yog tsuas yog siv rau thaj tsam tsis muaj zog tawg, ntu ntu faus, ntu tsis sib haum ntawm lub qhov tsua nkag, seem xuab zeb, xuab zeb, thiab gravel seem thaum lub sijhawm nws tus kheej ruaj khov. Kev tiv thaiv them ua ntej rau thaj chaw xws li thaj tsam puas tsuaj.

Lub paj yeeb nkab steel yog ib txoj hauv kev tsim kho zoo heev uas tsis muaj chaotic excavation ntawm lub ntsej muag ua haujlwm. Hauv kev tsim kho ntawm cov pob zeb tsis muaj zog thiab tawg, cov kav dej me me tuaj yeem ntxiv dag zog rau cov pob zeb xoob. Tom qab grouting, qhov tsis zoo ntawm cov pob zeb xoob thiab tsis muaj zog nyob ib puag ncig yog txhim kho, uas yog qhov zoo rau kev tsim kho ntawm cov pob zeb nyob ib puag ncig tom qab kev ua tiav ntawm kev khawb thiab thaum lub sij hawm pib kev txhawb nqa Nws yuav tsis chaotic, thiab cov pob zeb ib puag ncig yuav tsis poob stability. los yog vau.