Northwest Boring Co. Inc. (NWB) nke Woodinville, Washington, bụ Shoreline Construction nyere ya n'okpuru maka nnọchi mberede nke Obodo Mill Creek dara 36-in.ọkpọkọ ọkpọkọ mmiri ozuzo igwe gbajiri agbagọ nke nọworo na-ebute idei mmiri na mpaghara ime obodo, dị nnọọ n'ebe ugwu Seattle.
Mkpa maka ịrụzi sistemu mmiri mmiri ozuzo pụtara ìhè mgbe mmiri mmiri pụtara na Disemba 2017, n'etiti mpaghara Sweetwater Ranch na Douglas Fir.A rụrụ ọrụ nrụzi nwa oge, ma ebe a na-adọba mmiri dị n'otu ebe ahụ ka otu ọnwa gachara.Mgbe nyochachara, e kpebisiri ike na onye mmekọ dara ada na mmebi nke 36-in.ọkpọkọ bụ ihe kpatara ya.N'ihi na Obodo Mill Creek ekwupụtala nke a ọrụ mberede yana mmefu ego na-erughị $300,000, a chọghị usoro ntinye aka ọha.Ahọpụtara Shoreline Construction dị ka onye ọrụ ngo, bụ nke nyefere ọrụ na-enweghị ọrụ na NWB.
A na-edobe nhazi a na-ahazi maka nnọchi n'ime ebe dị warara dị n'etiti ụlọ abụọ na omimi 11-ft na ala siri ike.N'inwe obere ala na ụlọ, omimi nke nrụnye na ọnọdụ ala, NWB maara na usoro na-agwụ ike nke Akkerman ga-abụ nhọrọ nrụnye dị mma maka njikọ mmiri mmiri ọhụrụ.
NWB were Akkerman GBM 4800 Series Jacking Frame ya na ihe nkwụnye ihe nkwụnye ọkụ dị elu maka ihe na-agwụ ike.Nchikota mere ka o kwe omume ịwụnye pilot tube ngafe na 10-ft ọkpọkọ ọkpọ na torque na jacking ike nke auger na-agwụ ike igwe ma n'ime a obere ogwe.Nhazi ahụ jiri otu oghere igba egbe malite ịgba ọsọ site n'akụkụ abụọ ahụ nke na-ebelata mmebi ihe onwunwe nke ndị bi ma chekwaa na ụgwọ ọrụ.
Ọnọdụ ala dị ugbu a bụ glacial ruo na nkume, nke a na-ahụkarị maka mpaghara a.Enweghi ike ibugharị ala a site na isi isi ụgbọ mmiri ọkọlọtọ nke mere NWB mere ndokwa iji ngwá ọrụ pụrụ iche maka ala 12,000 psi UCS.Nhọrọ nke nhọrọ, Rock Drill Adapter na TriHawk drill bit, duuru tube pilot na-agafe nke mebere 140- na 110-lf alignments na akara dị mkpa na ọkwa maka ike ndọda.N'otu oge ahụ, a na-etinye usoro mmanye mmanye nke ala kwesịrị ekwesị iji wụsa osisi ndị e gwupụtara n'ala azụ n'osisi mmalite maka iwepụ.
Ndị ọrụ jikere wee duzie jakị 110- na 140-lf, 36-in.ígwè casing.N'ihu nke mkpuchi ahụ, NWB weputara mkpanaka ntụ ntụ nwere 36-in.cutterhead nke dabara na 36-in.dayameta casing.Akụkụ swivel nke ngwá ọrụ ahụ na-etinye uche na ntụgharị auger mgbe onye na-egbu anụ, nke nwere ngwá ọrụ carbide gage cutter na-adịgide adịgide, gwupụtara ala ahụ siri ike.Emechara ngafe nke abụọ a site na mkpanaka swivel nke nwere cutterhead maka akụkụ abụọ mmiri ozuzo.
Emechara nhazi ahụ na nkeji iri abụọ na asaa.Vylon na-ebu ọkpọkọ etinyere n'ime casing tupu emee njikọ na akụrụngwa ndị dị ugbu a.Site na mmalite ruo n'isi, arụchara ọrụ ahụ niile n'ime ihe na-erughị otu ọnwa, na-edozi nsogbu obodo ahụ n'oge na obere ntinye aka na ndị bi.
Oge nzipu: Nov-04-2019