Page 205 - 《水资源与水工程学报》2024年第5期
P. 205

!35 "!5 #                         & ' ( ) & * + , -                               Vol.35No.5
               2024 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2024

            DOI:10.11705/j.issn.1672-643X.2024.05.24


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                                       1,2       2         1          1       1        1,2
                                :;< , = > , ?@A , BCD , E F , G H
                    (1. PsF[=&'…PsFGHI[5›ŠÍVHz{|}, Ps tP 330029;2. s.OQ&@I'
                                      RÃO1[è`awxyHz{|}, Ss éT 712100)
                 H I: {°èU\[öa–PÄOP, ŽVUÃ[è5›Ï–、 /nWX8WkøWàWE<H¨¬­。cXY
                 ‰‘+ÿèU[cqrPÄP얕¬W‰, tVUè\[ü€¤ýVlZ, fycXY‰hÝ̜PV\[
                 öa+ÿÅÁ‹[。vö}˜¹ºèUS\¤Mä]–PR\[öa, ¬üG‘â‰(TDR) OY4̎, |§
                 cXYW‰PVèU\[öa–Ìœr, Ù(ŠèUlZýV%ŽfycXY‰–ðñ。¼½Ò›: ./èU
                                                                                        -8
                                                                                            2
                 \[, èUcÝt K¸Z 1.8W/(m·K) àáM 1.1W/(m·K), cÀwt α¸Z 1.0×10 m /s çèM3.0×
                                                                8
                                           8
                   -8
                      2
                10 m /s, zc^ C¸Z 1.8×10 J/(kg·K) àáM 0.4×10 J/(kg·K); `cÝt H¸./èU\[E<Ý
                 êcÆÈq¢, ŠèUñ[tÆÈåt–²#_¡; Š TDRPV¼½#z,MAE¤ RMSE¸¾òY 1.66 ¤ 1.94
                         2
                   3
                      3
                 cm /cm,R ¸Y 0.96; fycXY‰h*+õ}–VUè\[öaPV¼½, q H¸–ÆÈh•¢èUlm–
                 ýV, õYèUä`EÍöa、 öa¤bcUVr–ÏdOP*+@™¤–—Ëd。
                 JKL: VUè; \[öa; cXYW‰; ñ[t; fy
                 MNOPQ:S152.8   RSTUV:A    RWXQ:1672643X(2024)05020108
              Monitoringofredsoildehydrationprocessbysingleprobeheatpulsemethod
                                                                                 1
                                                                                           1
                                              2
                               1,2
                                                                1
                   WEIHaoyan ,GENGNing,CHENGJingqing,KONGQiongju,HUYou,LIMin                        1,2
                (1.KeyLaboratoryofPoyangLakeWaterResourcesandEnvironmentofJiangxiProvince,JiangxiAcademyofWaterScience
                  andEngineering,Nanchang330029,China;2.KeyLaboratoryofAgriculturalSoilandWaterEngineeringinAridand
                          SemiaridAreasofMinistryofEducation,NorthwestA&FUniversity,Yangling712100,China)
                 Abstract:Theinsitumonitoringofsoildehydrationprocessisofgreatsignificanceforsoilandwaterre
                 sourcesmanagement,naturaldisasterwarning,anddisasterpreventionandreductioninredsoilareas.
                 Theheatpulsemethodiscommonlyusedforinsitumeasurementofsoilwaterandthermalcharacteris
                 tics ;however,cracksarelikelytooccurwhenredsoilloseswater,itisstillunclearwhetherthesingle
                 probeheatpulsemethodcanaccuratelymonitorthedehydrationprocess.Thisstudysimulatedthecontin
                 uousdehydrationprocessofsoilfromsaturationtodryingbylaboratoryexperiments ,andusedtimedo
                 mainreflection(TDR)methodasastandardtoverifytheaccuracyofheatpulsemethodinmonitoring
                 soildehydrationprocess.Inthemeantime ,theinfluenceofsoilcrackgenerationontheperformanceof
                 singleprobeheatpulsemethodwasevaluated.Theresultsshowedthatwithsoildehydration ,thesoil
                 thermalconductivity (K)decreasedfrom1.8to1.1W/(m·K),thethermaldiffusionrate( α )in
                                             -9
                                  -9
                                                 2
                 creasedfrom10×10 to30×10 m /s,andthespecificheatcapacity(C)decreasedfrom180×10         6
                         6
                 to40×10 J/(kg·K).Inaddition,thecontactthermalconductivity(H)exhibitedasteplikevariation
                 characteristicwithsoildehydration ,whichwasconsistentwiththeturningpointsofsoilwatercontent
                 changerate ,andtheHvalueindicatedtheformationofsoilcracks.ComparedwiththeresultsofTDR,
                 theMAEandRMSEvaluesofthesoilwatercontentduringthedehydrationprocessmonitoredbythesin

                !"#$:20240319; %&#$:20240507
                '()*: PsFGHI[5›ŠÍVHz{|}AJ()*+(2021SKSH07); "E/n&'()*+ (42307392); "
                        EHz0B9G*+(2021YFD1900700)
                +,-.: KÈL(1997—), M, mt•[T, #$0FV, 0FWXYVd[Ÿ。
                /0+,: Á @(1985—), M, ~/­T, #$, MwN, #$VÝj, 0FWXYO1[è5›=¬。
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