Prestressed tiebacks sune muhimman abubuwa a cikin geotechnical engineering na zamani, suna aiki azaman tsarin ƙarfafawa na ƙasa da ƙasa mai ƙarfi don ƙarfi na tensile da kuma bayar da ƙarfi na gefe a cikin yanayin ƙasa mai ƙarfi. Waɗannan systems galibi suna ƙunshi steel tendons na ƙarfi ko stress-relieved seven-wire strands waɗanda aka shigar da su cikin predrilled holes, grouted a wurin, sannan aka ƙarfafa su zuwa matakan mai da mai da aka tsara don kai matsayin ayyukan in-service. Tsarin ya ƙunshi bonded strand anchors, cement-based grout formulations, da anchorage hardware da aka tsara don rarraba ƙarfi daidai a kan sassa na ɗaukar mai yayin da ake riƙe da ƙarfi na dogon lokaci da ƙarfi na korosi.
Strands suna da abubuwan ƙarfin gaske na steel wire waɗanda aka tsara musamman don amfani a cikin ground anchorage da prestressed tieback systems a cikin deep foundation da geotechnical engineering applications. Wanda aka yi daga steel wires na ƙarfi mai ƙarfi da aka buga a cikin helical formation, waɗannan abubuwan da ke da karfi suna samun ƙarfin tensile wanda ke kusa daga 1,770 zuwa 1,960 MPa, wanda ke yi su da kyau don raba ƙarfin jujjuyawar mai ƙarfi a cikin geological layers. Kayan halittar strand materials, gami da ƙarfin gaske, ƙarfin rage, da tabbataccen halin stress-strain, suna tabbatar da su a matsayin abin da ke da mahimmanci a cikin modern ground support da earth retention strategies da ake amfani da su a fannonin gine-gine, ma'adinai, da injiniya na farar hula.
Anchor head shi ne abin da ke da karfi mai ɗaukar ƙarfi a cikin prestressed tieback systems, suna aiki a matsayin hanyar haɗi tsakanin prestressed cable ko strand da tsarin ƙasa. Wanda aka yi daga high-strength steel, anchor head yana aiki a matsayin bearing plate wanda ke raba ƙarfin tensile mai ƙarfi a kan fata mai faɗi, hana ƙarfin ɗaukar ƙarfi na yanki da lalacewa na kayan. Abin ya da tsarin don jure ƙarfin ɗaukar ƙarfi na dogon lokaci yayin da yake riƙe da haɗin gwiwa tare da surface na ƙasa da aka daure ko tsarin amsa na concrete mai ƙarfi. Geometry da bayanai na anchor heads anan da aka kiyasta su kwa ƙarfin ƙarfin da aka yi hasaba, tabbatar da raba ƙarfin daidai da aikin gaba a cikin geotechnical applications da ke da wahala.
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