Ngwá ọrụ ịkụ drilling rotary nke etinyere Jet Grouting

Ngwaọrụ ịkụ mmiri rotary nke ejiri jet grouting bụ ụdị pụrụ iche nke ngwa ọrụ injinia ntọala nke a na-eme ka ọ rụọ ọrụ jet grouting nke nwere nrụgide dị elu na nrụpụta ntọala miri emi na ọrụ mmezi ala. Ụlọ ọrụ ịkụ mmiri a na-ejikọta ikike ịkụ rotary na usoro jet grouting iji mepụta ihe owuwu ala-cement nke na-eme ka ọ dịkwuo mma, na-eme ka ọ sie ike, ma na-eme ka mmiri ghara ịbanye na ala. Njikọta nke ọrụ ịkụ na jet grouting nwere nrụgide na-enye ndị ọrụ ọrụ ohere ịbanye n'ala geological n'otu oge ma tinye ihe na-eme ka ọ dịkwuo mma, na-eme ka igwe a bụrụ ihe dị mkpa maka nsogbu ntọala siri ike na ọnọdụ ala na mmiri. Ngwaọrụ ịkụ mmiri nke ejiri jet grouting na-arụ ọrụ n'ọtụtụ ngwa ntọala miri emi gụnyere owuwu mgbidi diaphragm, mkpuchi mkpuchi, mgbidi secant na tangent, na mmezi slopes na oghere ala. Ngwaọrụ a na-eme nke ọma na ịmepụta ogige ala-cement kwụ ọtọ ma ọ bụ dị nso na kwụ ọtọ nke na-eme ka ikike ibu dịkwuo mma, na-ebelata permeability, ma na-enye nkwụsi ike n'akụkụ. Na njikwa mmiri, mkpuchi jet grouting na-egbochi mmiri ịbanye na ala ma na-ebugharị ihe na-emebi site na aquifers nke emebere. Maka ọrụ ntọala na ndozi, usoro ndị a na-abanye na mpaghara ndị dị weak nke ihe owuwu dị adị ma tinye ihe na-ejikọta na-enweghị mkpa ịkụ ala ma ọ bụ mebie ihe owuwu dị adị. Usoro ọrụ nke jet grouting na-ejikọta ịkụ rotary na ntinye mmiri nwere nrụgide dị elu. A na-eme ka mast ịkụ rotary na-abanye na pipe grouting pụrụ iche n'ime ala ruo na ọkwa a chọrọ. A na-apụ apụ mmiri grouting nwere nrụgide—n'ozuzu cement slurry ma ọ bụ ngwọta kemịkal—site na jets na njedebe nke pipe na nrụgide dị n'etiti 200 na 600 bar (20 ruo 60 MPa). Ndị jets nwere ọsọ dị elu a na-eri ma na-eme ka ala na-apụ n'ala, na-ejikọta ya na ihe na-ejikọta a na-etinye. Ka a na-ewepụ pipe ịkụ mgbe a na-edebe nrụgide jet na ike ịkụ, a na-emepụta ihe owuwu ala-cement kwụ ọtọ. Usoro erosion jet, jikọtara na njirimara njikọ nke grout, na-emepụta ihe owuwu na njirimara geotechnical ka mma nke ukwuu karịa ala ọhụrụ. Nhazi ngwa ọrụ n'òtù a na-ejikarị gụnyere usoro mmiri otu (ebe a na-etinye naanị cement slurry), usoro mmiri abụọ (na-ejikọta mmiri na cement maka ịbawanye iru na nkwụsi ike), na usoro mmiri atọ (na-ejikọta mmiri, ikuku, na cement maka ịbawanye ala displacement na nhazi ogige). Ngwaọrụ a na-agbanwe site na obere, trailers nke a na-etinye n'ala nke dabara adaba maka ohere saịtị dị oke njọ ruo na nnukwu, igwe na-emegharị nke nwere ike iru ọkwa karịrị 60 mita na ọrụ jet grouting nke ọtụtụ nzọụkwụ. Ihe ndị bụ isi na-emetụta ịhọrọ ngwa ọrụ gụnyere ike ịkụ rotary (n'ozuzu 50–200 kW), ikike ịkụ ala, nrụgide na ọsọ mmiri, nha pipe ịkụ, na akara nkwụsi ike maka profaịlụ ala na ọnọdụ mmiri dị iche iche. Ndị ọrụ na-ahọrọ igwe ịkụ jet grouting na-enyocha ihe a chọrọ, ike ala a tụrụ anya, nha na spacing nke ogige a chọrọ, ọnọdụ mmiri, ihe mgbochi ohere saịtị, na ọnụego mmepụta. Ngwaọrụ ga-emezu akara nrụgide nke EN 12716 (Jet Grouting), EN 1537 (Ground Anchors), na ISO 13374 maka usoro grouting. Imezu DIN 4090 na iwu ụlọ obodo na-enyere aka na-eme ka ihe owuwu dị mma na nchekwa ndị ọrụ n'oge ọrụ grouting nwere nrụgide dị elu.