Ụkọ prestressed tiebacks ndị a bụ akụkụ mkpa n'ihe ọrụ geotechnical n'oge a, na-arụ ọrụ dịka sistemu mgbago ala na okwu emume ma ọkwa nke na-adịkwa mgbe niile. A mepụtara ha iji igbalịa ụkọ ibu na na-enye ike nchekwa n'akụkụ ebe ala mwere nsogbu dị ike. Sistemu ndị a na-agụnye ígwè ike elu ma ọkwa ígwè asaa na-agbakọ akụkụ na-abanye n'ọnụ ala a ka-akpọrọ ihe mma, wee bulite n'ìru ibu na-akọwaputara karịrị ihe a na-atụ anya n'oge ụlọ na ọrụ. Nhazi ya na-agụnye ígwè mkpọ mma, ihe mma cement-dabere, na akụkụ ibu emepụtara iji eme ibu n'elu ala ma na-edobe ike n'ụtụ oge na ike igbe mkpa.
Strands bụ ihe igwe ndị dị ike nke emere iji maa n'akụ ala na usoro tieback nke akụ n'ime usoro elu akụ na geoteknikọl. E mejuokọrọ ha n'ike igwe ndị dị elu na-agba agba n'ụdụ helical, ihe akwakwọ ndị a na-enweta ike ijikọ nke nwoke na mbadamba nke 1,770 ruo 1,960 MPa, nke na-eme ka ha dị mma maka ibu arọ ndị dị ukwu n'etiti ndụ geological. Ihe ndị dị iche n'strand materials—gụnyere ike yield dị elu, njigide relaxation obere, na ngwungwu stress-strain na-eme ka ha dị ezi ezi—na-etolite ha dịka ihe nkwarụ n'mgbakasị ike akụ na earth retention ngwa ndị emere mma ugbu a n'etiti ụwa akwakwọ, mining, na civil engineering.
Isi nkwụ anchor bụ akụkụ ibu-mma na nnupu n'ụkọ nke sistemu tieback akwado ike, na-eme ka njikọ mma n'etiti eriri ma ọ bụ ije nke akwado ike na ihe ụtụ ala. Ọ na-agawa n'ígwè ibu-ike na-eme nke ike, isi nkwụ na-arụ ọrụ dịka pleit ihube na-esebesu ibu mmeri mma elu ihu karịa, na-egbochi mmebi ihube nso-nso na ibuwa ihe elu. A meere akụkụ a ike igba mmeri elu akwado-axis nke na-akwasa oge ruo oge ebe na-ejide njikọ ihu elu na elu ala gbamgbuo ma naa sistemu beretọn nke akwado ike. Ihe ngosi na ụmụ iwu nke isi nkwụ ndị a a kọrọ nke ọma n'usoro ibu nke a tụrụ anya, na-eme ka esebesu ibu kaachị mma na oru elu ogologo oge n'arụmụka geotechnical dị gburugburu na-achọ ike.
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