ClassificationofConcreteSleepers（SessionI）土木工程檢測技術(shù)專業(yè)教學(xué)資源庫LearningResourcesforSurveyingTechnologyforCivilEngineeringMajors混凝土枕類型（一）1.Definitionofrailsleepers軌枕定義2.Classificationofrailsleepers軌枕分類3.Featuresofconcretesleepers混凝土枕特點ClassificationofConcreteSleepers混凝土枕類型ThepreviousJingzhangRailwayClassificationofConcreteSleepers混凝土枕類型Lead-in導(dǎo)入：舊京張鐵路新京張鐵路ThepresentJingzhangRailway1.Definitionofrailsleepers軌枕定義ClassificationofConcreteSleepers混凝土枕類型Position:transverselydistributedundertherailsFunction:tomaintainrails&pressuretransferRequirements:firm,durable,&elastic位置：橫向鋪于鋼軌軌底作用：固定鋼軌、傳力要求：堅固、耐久、有彈性2.Classificationofrailsleepers軌枕分類(1)

Byutilities按用途ordinarysleepersClassificationofConcreteSleepers混凝土枕類型橋枕岔枕普通軌枕bridgesleepersturnoutsleepers(2)Bymaterials按材料混凝土枕鋼枕woodensleepersClassificationofConcreteSleepers混凝土枕類型2.Classificationofrailsleepers軌枕分類木枕concretesleeperssteelsleepersClassificationofConcreteSleepers混凝土枕類型3.Featuresofconcretesleepers混凝土枕特點(1)Asheavyinweightandunifiedinsize,concretesleepersofferwell-distributedelasticityandhighlevelstability;自重大，尺寸統(tǒng)一，軌道彈性均勻，軌道的穩(wěn)定性高；(2)Thehighresistanceofthetrackbedisbeneficialtoenhancethelateralstability;道床阻力高，利于提高橫向穩(wěn)定性；(3)Withrichresourcesforrawmaterials,concretesleepersarenotaffectedbyclimate,decay,andworms,andhavelongservicelife.材源豐富，不受氣候、腐朽、蟲蛀等影響，使用壽命長。ClassificationofConcreteSleepers混凝土枕類型3.Featuresofconcretesleepers混凝土枕特點(4)Poorflexibility,complexfasteners,lowinsulationperformance,anduneasytoconductdisplacement.彈性差、扣件復(fù)雜、絕緣性能低、更換較困難等。ClassificationofConcreteSleepers混凝土枕類型1.Definitionofrailsleepers軌枕定義2.Classificationofrailsleepers軌枕分類3.Featuresofconcretesleepers混凝土枕特點3.什么是持力層？什么是下臥層？地基是有一定深度和范圍的，當?shù)鼗蓛蓪蛹皟蓪右陨贤翆咏M成時，通常將直接與基礎(chǔ)底面接觸的土層稱為持力層；在地基范圍內(nèi)持力層以下的土層稱為下臥層（當下臥層的承載力低