土工布孔徑特征及其與滲透性能關(guān)系研究.pdf

1、摘要I土工布孔徑特征及其與滲透性能關(guān)系研究摘要非織造土工布的水力學(xué)性能是水、土壤和土工布相互作用的重要性能參數(shù)，主要包括孔徑特征和滲透特性。滲透特性表明土工布在過(guò)濾和排水方面的能力，根據(jù)工程需要，或者實(shí)際的土壤情況，土工布必須確定垂直于其平面的滲透特性，例如流速指數(shù)、垂直滲透系數(shù)和透水率等指標(biāo)。土工布的孔徑特征直接影響其滲透性能，研究非織造土工布的孔徑特征的變化規(guī)律與滲透性能相互關(guān)系有很重要的意義。本文在分析孔徑特征與滲透性能的基礎(chǔ)上，

2、對(duì)表征孔徑特征與滲透性能的參數(shù)進(jìn)行了分析對(duì)比，著重選取等效孔徑O95、平均孔徑、垂直滲透系數(shù)三個(gè)參數(shù)以及其測(cè)試方法進(jìn)行了分析討論，確定了測(cè)試方法的選用；試驗(yàn)部分主要為選取了四種有針對(duì)性的樣品，分別為長(zhǎng)絲針刺土工織物、短纖針刺土工織物、機(jī)織土工織物、復(fù)合土工織物（非織造機(jī)織），進(jìn)行了一系列的性能測(cè)試，包括其單位面積質(zhì)量、厚度（不同壓力下）、垂直滲透系數(shù)、等效孔徑O95、平均孔徑、最大孔徑，針對(duì)不同樣品的不同性能之間的相關(guān)性進(jìn)行了深入的分析

3、討論。通過(guò)試驗(yàn)得出一系列結(jié)論：ABATRACTIIISTUDYONTHERALATIONSHIPBETWEENPESIZEACTERISTICSVERTICALPERMEABILITYOFGEOTEXTILEABSTRACTThehydraulicpropertiesofnonwovenfabricisanimptantparameterftheinteractionofwatersoilgeotextile.Thepermeabili

4、tyacteristicsshowthattheabilityofgeotextilefiltrationdrainageaccdingtotheneedsoftheprojecttheactualsoilgeotextilemustdeterminetheverticalintheplaneofthepermeabilityacteristicssuchasexponentialvelocityverticalpermeability

5、coefficientpermeabilityrateindex.Theacteristicsofthepesizeofthesoilisveryimptanttostudytherelationshipbetweenthechangeofpesizepermeabilityofnonwovenfabric.Onthebasisofanalysistheacteristicsofpestructurepermeabilitytoacte

6、rizethepepermeabilityperfmanceparameterswerecomparativeanalysisfocusingonedequivalentapertureO95averagepediameterverticalpermeabilitycoefficientofthreeparametersthetestingmethodareanalyzeddiscussedtodeterminetheionofmeth

7、odsoftestPartoftheexperimentmainlysfourtypeofsamplesacupuncturefilamentgeotextilefabricshtfiberneedlepunchedgeotextilefabricwovengeotextilefabriccompositegeotextilefabric(nonwovenwoven)conductedaseriesofperfmancetestsinc

8、ludingtheunitareaqualitythickness(pressure)verticalpermeabilitycoefficientequivalentapertureO95averagepediametermaximumaperturethecrelationbetweenthedifferentperfmancefdifferentsampleswereindepthanalysisdiscussion.Aserie

9、sofconclusionsaredrawnthroughexperiments:1themethodofdrysievingwasusedtomeasurethepesizein0.1mmthephenomenonofelectrostaticagglomerationwaseasytooccur.Theequivalentpesizewasfoundtohavenoregularitysotherewasnoregularitybe