Rigs Crawler Jet Grouting

Ngwá ọrụ jet grouting nke etinyere na crawler bụ ụdị ngwá ọrụ pụrụ iche n'ime usoro jet grouting mmiri otu, nke a na-eme ka ọ bụrụ na ọ na-enye injection grout na nrụgide dị elu site na boreholes a na-achịkwa site na monitor maka nkwụsị ala na ngwa ọrụ nchekwa na injinịa ntọala miri emi. Ngwá ọrụ ndị a na-ejikọta ịkwaga, nkwụsi ike, na izi ezi iji rụọ ọrụ jet grouting a na-achịkwa n'ala siri ike ebe ngwá ọrụ a na-etinye na ụgbọ ala adịghị arụ ọrụ nke ọma. Na omume ntọala miri emi, a na-eji ngwá ọrụ jet grouting crawler eme ihe iji mepụta na ịkwado mgbidi mgbochi, ịmechi nkume mgbawa, na imeziwanye àgwà ala tupu piling ma ọ bụ ọrụ excavation. Ihe ndị a na-eji bụ ịmepụta mgbidi diaphragm na curtains cut-off maka njikwa mmiri ala na nrụpụta dam na ọrụ mmanụ, ịmepụta mgbidi secant ma ọ bụ nke na-ejikọta site na boring na-enyere jet na displacement ala, na-akwado slopes dị nso na ebe excavation, na-eme ka ọrụ ngwakọta ala na-emepụta matrices ala-cement, na imepụta ọrụ post-grouting iji mechi oghere na oghere na nkwụsị pile emechara. Ngwá ọrụ crawler bụ ihe dị mkpa na ebe a na-enyere aka na ala na-adịghị mma ma ọ bụ na-adịghị mma ebe ịkwaga na-enye nrụgide ala dị ala na nkwụsi ike ka mma ma e jiri ya tụnyere nhọrọ wheeled. Usoro ọrụ ahụ gụnyere ịkwaga grout site na usoro injection a na-achịkwa iji mepụta jet nke na-ejikọta n'ahịrị perpendicular na axis borehole. Ka monitor na-atụgharị, jet na-atụgharị na-emebi ma na-ewepụ ihe ala, na-emepụta kọlụm grouted cylindrical. Grout—nke a na-ejikarị cement suspensions nwere àgwà rheological a na-achịkwa—na-ejupụta oghere a na-ewepụ, na-emepụta njikọ mechanical na ala gbara ya gburugburu. Nkọwa ngwá ọrụ chọrọ njikwa nke nrụgide jet (nke a na-ejikarị 250–450 bar maka ala cohesive, 350–600 bar maka ihe ndị na-emepụta granular), viscosity grout, na ọnụego injection iji nweta diameter na ike kọlụm a tụrụ aro. Ọsọ iwepụ site na ịdị elu injection na-achịkwa geometry ikpeazụ nke kọlụm na usoro overlap n'etiti kọlụm ndị dị n'akụkụ. Nhazi ọkọlọtọ gụnyere ngwá ọrụ crawler nke nwere monitor otu na usoro nrụgide kwụsie ike ma ọ bụ nke nwere mgbanwe, usoro dual-monitor maka nrụpụta mgbidi ala buru ibu, na usoro jikọtara jet grouting na mmepe casing maka ịkwado displacement ala ka mma na usoro na-adịghị ike. Ngwá ọrụ dị iche iche na obosara track, ike injin (nke a na-ejikarị 50–150 kW hydraulic drive), ịdị elu ọrụ kacha elu (10–50 m), na ikike pump grout (100–300 L/min). Kriteria ịhọrọ na-ejikọta mkpa nke ọrụ: ịdị elu na ogologo mgbidi, nkewa ala na ike compressive na-enweghị njedebe, ọnọdụ mmiri ala, mkpa diameter na geometry overlap nke kọlụm, ohere ebe na ikike ibu ala, na ihe mgbochi oge. Njikọ ibu track na-abụ ihe dị mkpa na ọnọdụ clay saturated ma ọ bụ na-adịghị mma. Nhọrọ n'etiti monitors otu na ọtụtụ na-adabere na spacing kọlụm imewe na mkpa mmepụta. Iwu jet grouting na-achịkwa site na EN 12716 (Ime nke ọrụ geotechnical pụrụ iche—Jet grouting), EN 14199 (Micropiles), na ISO 21477 (Nkọwa na nkewa nke usoro spatial). Ikwesịrị ịkwado ngwá ọrụ na PED 2014/68/EU (Nkwupụta Ngwá Ọrụ Nrụgide) na ụkpụrụ ATEX iji hụ na arụmọrụ nchekwa nke usoro nrụgide.