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Język Polski
Kilka uwag na temat wzorców rozpraszania ciśnienia wody w porach z jednoosiowego badania konsolidacji
DOI:
https://doi.org/10.24425/ace.2022.143031Abstrakt
W artykule omówiono wzorce rozpraszania ciśnienia wody w porach uzyskane w laboratoryjnym badaniu jednoosiowej konsolidacji. Wzorzec rozpraszania ciśnienia wody w porach istotnie wpływa na obliczoną wartość współczynnika konsolidacji. Zasadniczo istnieją dwa typy krzywych rozpraszania ciśnienia wody w porach w przestrzeni półlogarytmicznej. Typ I charakteryzuje się dylatacyjną odpowiedzią rozpraszania na etapie wzrostu ciśnienia. Czas narastania ciśnienia może być znaczny, a obliczona wartość cv z etapu rozpraszania może nie być wartością rzeczywistą. Krzywa typu II wykazuje monotonicznie zmniejszającą się odpowiedź rozpraszania i charakteryzuje się dobrze zdefiniowanym odwróconym kształtem „S” z obecnością punktu przegięcia. Dla monotonicznie malejącej krzywej dyssypacji wartości stopnia dyssypacji w punkcie przegięcia są zbliżone do wartości teoretycznej Uub = 53.4%. W pracy omówiono metodologię interpretacji laboratoryjnych danych rozpraszania ciśnienia pochodzących z badania komorze Rowe'a. W analizie wykorzystano gradientowy algorytm wyznaczania optymalnej wartości współczynnika konsolidacji w celu porównania rozwiązania teoretycznego z wynikami eksperymentalnymi, uzyskanymi dla różnych gruntów drobnoziarnistych. Optymalną wartość współczynnika konsolidacji powiązano z najniższą wartością funkcji błędu, która ocenia dopasowanie między eksperymentalną i teoretyczną krzywą rozpraszania.Bibliografia
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