咸阳塬试坑浸水试验研究

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中图分类号：TU42 文献标志码：A 文章编号：2095-2945（2025）18-0062-05

DOI：10.19981/j.CN23-1581/G3.2025.18.013

Abstract：Forthepurposeoffinelyevaluatingthetypesofcolapsiblityinloess tableland，representativesiteswereselected foron-siteimmersiontest.Theexperimentalresultsshowthattheresearchareaiscollpsibleloesssiteunderoverburden presureintrialperiod，thelowerlimitdepthofthecollpsibleunderoverburdenpresureistakenfromthebottominterfaceof the Q3 paleosol layer;Thecharacteristicofloesscolapseunderoverburdenpressuredeformation hasbn determinedtobe"fast （6d）→relativelyuniform（38d）→fast（5d）→stable"，withthemaximumsetlementatthecenterpointofthetestpit;Duringthe processof waterinfiltration，infiltrationzonesimilartoaninvertedfunnelisformedradially，withanangleofabout 35∘ between thefunnelboundayandverticaldirectionoftestpitdge；Thesoilqualitycorectioncoeffientofcalculatingcollasevalue underoverburdenpresureβOisdeterminedtobeO.6O;Inrecoveryperiodafterthecompletionoftheexperimentitwasfound thatthesitehadbeendriedfor256days，andthefoundationsoilcontainedhighwatercontent，whichhadpoorenginering propertiesandwasnotconducivetoprojectconstruction;Aftertheimmersiontest，thecolapsibilityoftheupprsoillayer（above 17mbelowtheground）canbesignificantlyreduced，andthecollpsibilityofthedeepsoillayer（elow17mundertheground） canbeeliminated.Thisstudycanprovidebasisfordeterminingareasonable foundationtreatmentplanandconstructiondateof the testing site，and also provide reference and guidance for other construction projects in the region.

Keywords：loess tableland; collapsible loess； field immersion test； trial period;recovery perioc

黄土广泛分布于我国中西部地区，约占我国国土面积的1/6，以其具有强烈的水敏性而被归类为特殊性土。（剩余5439字）