简介：摘要：随着高速公路建设技术越来越成熟完善，原来在建设过程中遇到的各种问题，我们一直在寻求更具有优势的设计方案来替代传统的设计方案，其中近几年发展迅速的一种结构，桩板结构，本文主要介绍该结构的优势，并对其优势进行分析并对其应用的远景进行分析。

简介：如果你对世界足坛稍有了解的话。相信你一定会熟知大牌球星，像贝克汉姆、罗纳尔多、齐达内等：还有那些你喜欢的出名的或不出名的球员。可是，对贝利，这个被称为“球王”的巴西人，你对他的了解有多少呢？

简介：为了与僵硬学习负担转移机制和混合堆积的适用的能力，核心(MPSC)被插入预制增强的具体堆积(PRCP)形成，在原处测试与不同长度，直径，水水泥比率和PRCP包含MPSC，水泥混合了堆积，并且钻洞堆积，被执行。限制适用的能力，负担解决曲线和MPSC的压力分发，混合堆积被获得。在水泥土壤和PRCP之间的负担转移被有限元素方法分析(女性)。测试结果和女性的分析证明MPSC充分从从外部顶装进转移内部水泥的PRCP的混合堆积和高压缩强度玷污的水泥利用了大磨擦，并且那插入进混合堆积的PRCP改变混合堆积的压力分发并且改进在混合堆积和土壤之间的摩擦抵抗。长度和MPSC的节区域onPRCP两个都有最佳价值。采用MPSC在改进软土壤地面的适用的能力是有效的。

简介：Inthispaper,thenonlinearcollapseoftheBOHAI-8pilefoundationjacketplatformhasbeenanalyzed.Theultimateloadandcollapseprocessoftwocomputationalmodelsofthestructurearegiven.Onemodelisoffixedsupportwhoselengthiseighttimesthepilelegdiameterandtheotherconsid-ersthenonlinearityofthesoil-pileinteraction.

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简介：Inthispaper,severalmathmaticalmodelsforthepile-soilinteractionareoutlined.TheBoundaryElementMethodisoneoftheveryeffectivemethodsforthereasonablemodelsofelasticityandelastoplasticity.ThemajorofthispaperisconcernedwiththeBoundaryElementMethodforthepile-soilinteraction,includinggeneralmethodsandcalculatingformulationofstaticanddynamicanalysisofthepileandpilegroups.Someresultsofanalysisarealsogiven.

简介：一系列调查被进行学习适用的能力和混合的使硬的深水泥(SDCM)的负担转移机制堆积。实验试验包括六个标本被进行调查在具体核心和thecement土壤之间的摩擦抵抗。二模型堆积和24照原尺寸的堆积被测试检验单个堆积的适用的行为。实验室和模型测试结果显示连贯的力量足够大保证在核心堆积和外部水泥土壤之间的相互作用。full-scaletest结果证明SDCM堆积展出类似的适用的行为到无聊并且cast-in-placeconcrete堆积。一般来说，与合理合成结构，SDCM堆积能有效地播送应用负担，并且由于更生硬的核心的增加，SDCM堆积拥有高适用的能力。基于这些试验性的调查和理论分析的调查结果，一个实际设计方法被开发预言SDCMpile的垂直适用能力。

简介：当设计一个堆积基础时，否定皮肤磨擦(NSF)是重要问题之一。然而，为堆积基础在dragload和downdrag上装载顺序的影响很少被学习。在这份报纸，一个三维的数字模型用FLAC3D被建立。与模型测试的结果相比，确定的模型能被用来学习堆积基础的NSF。影响因素包括堆积的长度直径比率和堆积头负担和超载的装载顺序被讨论。病历用FLAC3D被分析。计算结果在对测量结果的好同意。dragload和downdrag被堆积头负担和超载的装载顺序显著地影响，这被结束。dragload和downdrag在堆积头负担以后在超载的条件下面到达最大的价值。

简介：-Generallythetoeofthebankslopeinfrontofthepile-supportedpierhastobedredgedtomeettherequirementsofwaterdepthfortheberthofships,whilethetopoftheslopeinrearofthepiermustbebackfilledandelevatedtomakeconnectionswithlandtransportation.Thenthenaturalstateofequilibriumoftheslopeisdestroyed,andsomedeformationanddisplacementareunavoidablyinducedinthesoilmasswhichwillexertanundesirableinfluenceonthepilefoundationofthepier.Thisisatypicalproblemoftheinteractionbetweentheso-called"passivepile"andsurroundingsoil,andhasbeenscarcelystudiedintheliteratureofgeotechnicalengineering.Inthispaper,fieldobservation,modeltestsandnumericalanalysisconductedbytheauthorstostudytheinteractionbetweenpile-supportedpierandbankslopearebrieflydescribedandsomepreliminaryresultsarepresented.

简介：到进堆积的无弹性的行为的获得卓见，在干燥的沙嵌入并且使遭到了到周期的侧面的装载的垂直堆积的反应在在Laboratoire中央desPontsetChaussées进行的离心机测试试验性地被学习。周期的装载的三种类型被使用，二不对称并且关于卸掉的堆积对称的。有深度的土壤僵硬的一个近似方形根的变化从间接飞行中的密度大小，重新组成的样品上的实验室测试，和生长得很好的实验关联被获得。测试用一个周期的非线性的Winkler春天模型被模仿，它描述无弹性的现象的完整的范围，包括堆积从并且到土壤的分离和重新附件。模型由能够复制的三个数学表达式组成许多单音的补品和周期的试验性的p-y弯。参数图形地被解释的关键模型并且与土壤行为有关的物理意思。有离心机测试结果的比较表明捕获堆积土壤相互作用的几个特征的模型和它的能力的一般有效性，包括：在装载的一个早阶段玷污plastification，在堆积，和僵硬和力量的上面的部分附近由于一个松驰地区的形成“拧”行为由于周期的装载变化。从里斯等的古典曲线的曲线从测试结果和建议模型导出的p-y的比较，以及那些。(1974)为沙，也被介绍。

简介：ThelevelicethicknessandcompressivestrengthatthefourmeasuringstationsintheLiaodongBayareinferredaccordingtothehydrologicandmeteorologicdatathere,thentheyearlyextremeiceforcesonasolitarypilearecalculatedbytheuseofappropriateformulaoficeforcesanditsprobabilisticdistributionisdetermined.Generally,theyearlyextremeiceforcefollowsWeibulldistributionbestascomparedwithNormal,Lognormal,andExtremeValueIdistribution.Ontheotherhand,theshort-termdistributionoficeforcesonasolitarypileisobtainedfromthemodelexperimentdataanalysis:ItdoesnotrefuseExtremeValueIdistribution.

简介：题目：水下板桩叶片对移动河床的影响研究　　目的：比较板桩叶片和简单的平板叶片在控制河床沉积物再分配时的效率。　　方法：1.在不受当地侵蚀现象影响的接近障碍物和下游区域的直线水道中研究河床的形态；2.使用不同的实验装置测试简单几何形状的平板叶片和复杂形状的603K叶片的性能；3.在不同的叶片迎角和浸没参数下，测试与其面积接近的结构和在远场中的河床形态。　　结论：1.叶片的形状和迎角影响其对河床形态所产生的作用，尤其是对于较大的淹没参数而言；2.平板叶片和板桩叶片对下游河床的重塑作用相似；3.随着迎角的增加，平板叶片将造成更深的冲刷孔。这可能归因于与平板叶片相关的马蹄形涡流增加的侵蚀能力，而板桩叶片的不均匀表面可减轻该涡旋的侵蚀强度。

简介：Thisstudyconsidersthetorsionalvibrationofapipepileinatransverselyisotropicsaturatedsoillayer.BasedonBiot’sporoelastictheoryandtheconstitutiverelationsofthetransverselyisotropicmedium,thedynamicgoverningequationsoftheouterandinnertransverselyisotropicsaturatedsoillayersarederived.TheLaplacetransformisusedtosolvethegoverningequationsoftheouterandinnersoillayers.Thedynamictorsionalresponseofthepipepileinthefrequencydomainisderivedutilizing1Delastictheoryandthecontinuousconditionsattheinterfacesbetweenthepipepileandthesoils.ThetimedomainsolutionisobtainedbyFourierinversetransform.Aparametricstudyisconductedtodemonstratetheinfluenceoftheanisotropiesoftheouterandinnersoilonthetorsionaldynamicresponseofthepipepile.

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简介：Sprayingtestwereconductedtwicebeforesteelslabswereputintothefurnaceandtheeffectsoftheoxidationresistancecoatingwereinvestigatedandverified.Bycomparingthechangeofslabweight,rollingforceoftheroughingmill&finishingmill,thicknessofoxidefilmonthesurfaceslabsbyanXL-30SEMandacidpicklingspeedofslabswithandwithoutcoating,itwasfoundthattheoxidizationwasteinthefurnacedecreasedby40percentwiththeuseofthecoatingandthecorrespondingyieldcapacitycouldincreaseby0.2percentatleast.Besides,thethicknessofoxidescalefilmonhotrolledproductswasreducedby1.44micrometersandtheacidpicklingtimewasshortenedby6swiththecoatingtechnology,whilethetotalrollingforceofRM&FMdidnotchanged.Furthermore,theapplicationprospectofthistechnologywasalsodiscussedinthispaper.

简介：Thecenterlinesegregationincontinuouscastingsteelisknowntobeformedbytheinterdendriticenrichedliquidflowatthesolidificationendinstrand.Atpresent,severalmethods,suchasthermalsoftreduction,electromagneticstirringanddynamicsoftreduction,areavailabletoreducethecentersegregationandtoimprovetheinternalquality.Althoughsomemethodscouldalleviatecentersegregationtosomeextent,theycanalsogiverisetonewproblems.Forinstance,thermalsoftreductioncanleadtosurfacecrackingduringcastingofsomesteelsandelectromagneticstirringcanresultinwhiteband.Dynamicsoftreductionisaneffectivetechnologyfortheimprovementofstrandqualityincontinuousslabcasting.Inthispaper,thekeyparametersofdynamicsoftreductiontechnology,suchassoftreductionregion,thetotalreductionamount,forlowcarbonsteelhavebeenstudiedbasedonexperimentalandtheoreticalanalysis.Thesoftreductionregionwasrelatedtothesegregationofchemicalcomposition,slabbulgingofnarrowsideandavoidinginternalcrackofslab.Thetotalreductionamountwascomposedofnaturalthermalshrinkageandactualreductionamountdependingoncriticalstrain.Forlowcarbonsteelwithslabdimensionof(950-1950)mm×170mm,thesolidfractionrangeinsoftreductionregionwasrecommendedfrom0.4to0.8,thetotalreductionamountwas2.0-2.8mm,andtheoptimizedreductionratewas0.4-1.2mm/min,respectively.Furthermore,adynamicsoftreductionsystemincontinuousslabcasting,VisualCast-Dynamic,hasbeendevelopedbymultithreadingmethod.Itdemonstratedthatthedynamicsoftreductionmodelinthisstudywascorrectwiththeabilityofonlinecontrol.

简介：TheSENforthinslabcon-castingiseasytobreakanddamagebecauseoftheoxidationduringpreheatingandapplication.TheenamelcoatingmaterialisgenerallyappliedonthesurfaceofSENtoavoidtheoxidation.Thecoatingmaterialwithbornglassandsiliconasmainstartingmaterialsandsilicasolasbinderwasstudied.ZrO2-CandAl2O3-Cmaterialscontaining15%carbonwereisostaticpressed,andheatedat600℃,900℃,1200℃,1500℃for2h,respectively.Theresultsshowthatthecoatingmaterialwith70%ofboronglassand30%ofsiliconbondedbysilicasolcanformdenserprotectionlayerintheabovementionedmaterialsattherangeof600-1500℃.Theoxidationarearatioandweightlossratiowiththecoatingaremuchlowerthanthosewithoutthecoating.

简介：Thevibrationproblemofapileofarbitrarysegmentswithvariablemodulusunderexcitingforceisestablished,inwhichtheinfluenceofthesoilunderpiletoeandthesurroundingsistakenintoaccount.WithLaplacetransforms,thetransmitfunctionsforvelocityanddisplacementofpilearederived.Furthermore,intermsoftheconvolutiontheoremandinversedLaplacetransform,ananalyticalsolutionforthetimedomainresponseofapilesubjectedtoasemi-sineimpulseisdeveloped,whichisthetheoreticalbasisofthesonicmethodinpileintegritytesting.Basedonthesolution,thevibrationpropertiesofpilewithsharporcontinuousmodulusarestudied.Thevalidityofthisapproachisverifiedthroughfidddynamictestsonsomeengineeringpiles.Itshowsthatthetheoreticalpredictionandtheresponseofthepileareingoodagreement.

简介：Thisworkpresentsanewanalyticalmethodtoanalyzetheinfluenceofreactionpilesonthetestpileresponseinastaticloadtest.Inourmethod,theinteractiveeffectbetweensoilandpileissimulatedusingindependentspringsandthesheardisplacementmethodisadoptedtoanalyzetheinfluenceofreactionpilesontestpileresponse.Moreover,theinfluenceoftheshelteringeffectbetweenreactionpilesandtestpileonthetestpileresponseistakenintoaccount.Twocasesareanalyzedtoverifytherationalityandefficiencyofthepresentmethod.Thismethodcanbeeasilyextendedtoanonlinearresponseofaninfluencedtestpileembeddedinamultilayeredsoil,andthevalidityisalsodemonstratedusingcentrifugemodeltestsandacomputerprogrampresentedintheliterature.Thepresentanalysesindicatethattheproposedmethodwillleadtoanunderestimationofthetestpilesettlementinastaticloadtestiftheinfluenceofthepresenceofreactionpilesonthetestpileresponseisneglected.

简介：这篇论文研究平板波导然后匹配的效率在之间的结束衍射远地并且它的Gaussian近似的地被分析导致分叉一半角度的一个新定义。最后，远地的罐头为什么被Gaussian功能接近，根据横梁繁殖因素的特征被介绍。