Cov av ntxhib-grained txhais tau tias yog cov cov av uas lawv cov nplej tau khaws cia rau ntawm No. 200 (0.075 mm) sieve. Cov nplej ntawm qhov loj me no feem ntau tuaj yeem pom ntawm qhov muag liab qab, txawm hais tias lub khob iav tsom iav yuav xav tau qee zaus kom pom qhov tsawg tshaj plaws ntawm cov nplej. Pob zeb thiab xuab zeb yog coarse-grained av.
Dab tsi yog cov khoom ntawm coarse grained av?
Coarse-grained xau muaj kev ua tau zoo compaction, muaj zog permeability, siab filling ceev, siab shear zog, tsis tshua muaj deformation, thiab siab bearing muaj peev xwm.
Cov av coarse thiab nplua-grained av yog dab tsi?
Coarse-grained av tau piav qhia los ntawm nws qhov gradation (zoo lossis pluag), particle shape (angular, sub-angular, rounded or sub-rounded) thiab mineralogical cov khoom. Cov av zoo-grained tau piav nyob ntawm nws lub zog qhuav, dilatancy, dispersion thiab plasticity. Nws muaj qhov zoo ntawm kev thauj khoom zoo.
Yuav ua li cas koj faib cov coarse grained av?
Ntau hom coarse-grained xau yog cais raws li: GW (Well graded Gravel), GP (Poorly graded Gravel), SW (Well graded Sand), SP (Poorly. graded Sand), SM (Silty Sand), GM (Silty Gravel), SC (Clayey Sand), thiab GC (Clayey Gravel).
Dab tsi yog qhov tseem ceeb ntawm coarse grained av?
Vim Coarse grained av muaj zoo heev engineering xws li cov nyhuv compacting zoo, siab permeability, zoo packingntom ntom, siab shear zog thiab kev sib hais haum me me, nws tau ua tiav siv hauv kev sib tsoo hauv ntiaj teb [1, 2], xws li Pob Txheem Ntiaj Teb
