Ngwaọrụ oscillators casing bụ ngwaọrụ enyemaka pụrụ iche eji na owuwu mgbidi diaphragm omimi na mgbidi secant iji mee ka ntinye na iwepụ nke casings ígwè nke oge na-achịkwa. Ọrụ ha bụ isi bụ itinye mmegharị oscillatory ngwa ngwa (na-agbanwe) kwụ ọtọ ma ọ bụ kwụ ọtọ na osi casing, na-ebelata friction n'etiti casing na ala gbara ya gburugburu, bentonite slurry, ma ọ bụ ngwugwu kọntaktị n'oge ndị dị mkpa nke owuwu mgbidi. Dị ka akụkụ dị mkpa nke usoro ntọala omimi nke oge a, casing oscillators na-eme ka arụmọrụ dịkwuo mma, na-ebelata oge usoro, na-ebelata mmebi ihe owuwu na panel mgbidi e wuru. Na owuwu mgbidi diaphragm, a na-ejikarị casing oscillators na oge iwepụ casing mgbe etinyere kọntaktị. N'oge ntinye mgbidi secant, ha na-enyere na ntinye casing mbụ na iwepụ ikpeazụ, na-ezere adhesion na ihe omume bridging nke nwere ike ime mgbe casings na-ejikọta site na friction ma ọ bụ suction. A na-ejikwa ngwaọrụ a na ọrụ cutoff curtain na jet grouting ebe a na-achọ ka casing strings na-emegharị na-achịkwa nke ọma na-enweghị ịtụgharị ma ọ bụ mgbanwe na-achịkwa nke nwere ike imerụ ihe ngwugwu slurry ma ọ bụ ngwugwu grout ọhụrụ. Usoro ọrụ na-adabere na mmegharị na-agbanwe ngwa ngwa—na-emepụta oscillations 10 ruo 60 kwa nkeji, na amplitudes stroke na-agbanwe site na 50 ruo 150 millimeters—na-emepụta cycles tension na compression na interface casing-ala. Oscillation a na-emebi njikọ adhesive n'etiti elu mpụta casing na ihe gbara ya gburugburu, na-ebelata resistance friction na ịkwado mmegharị elu ma ọ bụ ala. Oscillation synchronized na ọsọ iwepụ ma ọ bụ itinye na-achịkwa na-eme ka mmegharị casing dị mfe, na-ebelata oghere na pour kọntaktị, na-echebe panel mgbidi e wuru na mbụ pụọ na mmegharị lateral ma ọ bụ cracking ihe owuwu. Casing oscillators nke oge a bụ ngwaọrụ hydraulic, na-etinye ozugbo na onye ndu ma ọ bụ Kelly bar nke igwe drilling/wallmaking bụ isi. Ha nwere cylinder hydraulic nwere piston pụrụ iche nke na-emepụta mmegharị oscillatory, nke na-arụ ọrụ site na circuit hydraulic nke igwe na-arụ ọrụ na nrụgide na-adịkarị n'etiti 200 na 280 bar. Ụfọdụ nhazi gụnyere vibratory oscillators na-ejikọta mmegharị rotational na linear oscillatory maka arụmọrụ iwepụ ka mma na ọnọdụ ala siri ike nwere cohesion dị elu ma ọ bụ clay layers. Nhọrọ nke casing oscillators dabere na diameter na thickness mgbidi nke casings ga-enyocha, mkpa oscillation frequency na amplitude, ike hydraulic dị, ọnọdụ ala (cohesive vs granular, ịdị adị nke stabilization fluid), na depth nke ntinye. A ga-ejikọta ngwaọrụ ahụ na ikike ibu nke igwe na nkọwa usoro hydraulic; oscillators dị obere na-egosi na ha adịghị arụ ọrụ nke ọma, ebe units dị ukwuu nwere ike ibute ike lateral dị ukwuu na-emebi panel ndị ọzọ. Ihe ndị na-emetụta gburugburu gụnyere ọnọdụ mmiri ala, ike ala, na ihe ndị chọrọ pụrụ iche na-eme ka nhọpụta ahụ dịkwuo mma. Ike ọrụ nke casing oscillator na-achịkwa site na ụkpụrụ ISO, DIN, na EN kwesịrị ekwesị nke na-ekpuchi ngwaọrụ ntọala omimi, karịsịa EN 1538 (Nrụpụta ọrụ geotechnical pụrụ iche—Mgbidi diaphragm), ISO 6934 (Igwe eriri ígwè maka elevators), na DIN 4124 (Excavations na earthworks—Iwu nchekwa). A ga-enwerịrị asambodo ngwaọrụ, akwụkwọ nyocha ihe owuwu, na usoro ọrụ ka ha kwekọọ na iwu ụlọ mpaghara na nkọwa nhazi geotechnical nke ọrụ pụrụ iche nke a kpụpụtara n'oge usoro engineering zuru ezu.
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