地形平坦开阔,地层由第四系全新冲积层,第四系上更新统冲层组成,局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25~50m,岩性主要为黏土、粉质黏土、粉土、粉砂、细砂;第四系上更新统冲积层厚度大于50m,岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为:粉土、黏土、粉质黏土,局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Duetothecouplingboltsinaccordancewithhingeholescorrespondingtothediameterofthescrewholesonebyoneafterprocessing,processingbackboltinstallationlocationcannotbechanged,soaccordingtoboltaftertheactualweightdifferenceofnutandlockwashertomatch.Generalrequirementsforcouplingtwosymmetricaldiameterbolt,nutandlockwasher'stotalweightdifferenceshouldnotbegreaterthan10gandknocksstampedmark.(SeeFigure18)Thecouplingboltsapplylubricant,andthengentlywithcopperhome,nottoolooseortootight.BoltAssemblyisfinished,symmetricaltighteningallboltsto30%,50%,70%,100%force,andcheckthecouplingflutterandbeforeconnectingthecirclegraduallychangesitsvalueshouldbelessthan0.02mm.Tighteningtorqueofthecouplingboltsshallcomplywiththetechnicalrequirementsmanufacturersdrawings,withadynamometricwrenchorlogtensiontools.Threewheelrotorswingtestcouplingconnectionsshouldbechecked:takingleave,第一章地球和地图1.1地球和地球仪1.地球的形状:地球是一个两极稍扁,赤道略鼓的不规则。2.地球的表面积约平方千米,平均半径为,最大周长为千米。3.能在地球仪上认识地轴、北极、南极、经线和纬线。(书本第5页图1.4)4.经线和纬线的比较纬线经线形状特征(除极点外)指示方向指示方向指示方向长度特点不同的纬线长度,赤道最长,向南北两极递减,最后成一点等长数量无数条无数条5.经度和纬度的比较纬度经度度数范围0°—0°—起始纬线起始经线赤道(0°纬线)本初子午线(0°经线)度数的划分赤道为0°,向南北两极递增,南极点纬度90°S,北极点纬度90°N。本初子午线为0°,向东西方向递增至180°。半球的划分南北半球是以来划分的,赤道以北为北半球,以南为南半球东西半球是以和来划分的。经纬度表示方法北纬用,南纬用东经用,西经用6.低纬地区是指0°—30°;中纬地区是指30°—60°;高纬地区是指60°—90°。7.重点中重点:利用经纬网定位。赤道以北为北纬(N),赤道以南为南纬(S);向北递增的为北纬、向南递增的为南纬0°经线以东为东经(E),以西为西经(W);向西递增的为西经、向东递增的为东经要会利用经纬网读出某点经纬度,确定两点相对方向,如下图:分析内容A地B地纬度经度属于南、北半球属于东、西半球属于五带中的哪一带1.2地球的运动8.地球自转与公转地形平坦开阔,地层由第四系全新冲积层,第四系上更新统冲层组成,局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25~50m,岩性主要为黏土、粉质黏土、粉土、粉砂、细砂;第四系上更新统冲积层厚度大于50m,岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为:粉土、黏土、粉质黏土,局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Duetothecouplingboltsinaccordancewithhingeholescorrespondingtothediameterofthescrewholesonebyoneafterprocessing,processingbackboltinstallationlocationcannotbechanged,soaccordingtoboltaftertheactualweightdifferenceofnutandlockwashertomatch.Generalrequirementsforcouplingtwosymmetricaldiameterbolt,nutandlockwasher'stotalweightdifferenceshouldnotbegreaterthan10gandknocksstampedmark.(SeeFigure18)Thecouplingboltsapplylubricant,andthengentlywithcopperhome,nottoolooseortootight.BoltAssemblyisfinished,symmetricaltighteningallboltsto30%,50%,70%,100%force,andcheckthecouplingflutterandbeforeconnectingthecirclegraduallychangesitsvalueshouldbelessthan0.02mm.Tighteningtorqueofthecouplingboltsshallcomplywiththetechnicalrequirementsmanufacturersdrawings,withadynamometricwrenchorlogtensiontools.Threewheelrotorswingtestcouplingconnectionsshouldbechecked:takingleave,2绕什么转运动方向周期地理意义地球自转24小时或产生和地球公转形成,昼夜长短的变化,太阳直射点的位置移动和地球自转从极上空看:自西向东且时针;从极上空看:自西向东且时针(会画图)9.四季变化(南半球与北半球季节相反)名称日期太阳直射点位置北半球季节日3月21日前后赤道春季(3、4、5)夏至日前后北回归线夏季(6、7、8)秋分日9月23日前后赤道秋季(9、10、11)冬至日12月22日前后冬季(12、1、2)两分两至日全球各地昼夜情况春、秋分夏至冬至北半球昼夜平分昼夜,北极圈以内出现极现象昼夜,北极圈以内出现极现象赤道昼夜平分昼夜平分昼夜平分南半球昼夜平分昼短夜长,南极圈以内出现极夜现象昼长夜短,南极圈以内出现极昼现象10.五带的划分(要知道五带的名称、范围以及各带的天文气候特征)(自己画简图记忆)1.3地图的阅读11.地图基本要素:、、(也是地图的语言)12.比例尺(1)比例尺公式:北回归线南回归线北极圈南极圈热带南温带北温带北寒带南寒带23.5°N23.5°S66.5°N66.5°S天文特征气候特征有太阳直射现象有极昼极夜现象有极昼极夜现象无太阳直射无极昼极夜现象无太阳直射无极昼极夜现象终年炎热四季分明四季分明终年严寒终年严寒地形平坦开阔,地层由第四系全新冲积层,第四系上更新统冲层组成,局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25~50m,岩性主要为黏土、粉质黏土、粉土、粉砂、细砂;第四系上更新统冲积层厚度大于50m,岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为:粉土、黏土、粉质黏土,局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfact