Ngwá ọrụ oscillators casing

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.