路基路面课程课设(某高速公路沥青及水泥混凝土路面设计)道路桥梁方向

0《路基路面工程》课程设计任务书目录1设计资料······································································································11.1工程概况································································································11.2设计资料·······························································································11.3设计目的任务·····················································································12交通量分析··································································································23沥青路面设计·····························································································24水泥混凝土路面设计··············································································114.1混凝土路面设计基准期·····································································114.2标准轴载及轴载当量换算·································································114.3拟定路面结构······················································································124.4方案一的计算(手算)··········································································134.4.1确定材料参数···········································································134.4.2计算荷载疲劳应力·····································································144.4.3计算温度疲劳应力·····································································154.6接缝设计································································································175方案比选········································································································186总结体会········································································································197参考文献········································································································1911设计资料1.1工程概况拟设计路面属某段高速公路..路段位于平原微丘区,公路自然区划为Ⅱ2区,地震烈度为六级,设计标高240.50m,地下水位1.45m。1.2设计资料所经地区多处为粘性土。根据最新路网规划,预测使用初期2012年平均日交通量见下表：表1-1交通组成及交通量表车型双向交通量小客车SH—130912大客车SH—141173跃进牌NJ—130647东风牌EQ—140344黄河牌JN—150420日野KB22286太894交通量年平均增长率脱拉13（％）7.21.3设计目的任务（1）根据所给资料,利用HPDS2006公路路面设计程序系统进行路面结构的设计(沥青路面水泥路面至少各2种不同的路面结构各，其中水泥路面结构手工完成一个方案的计算)。(2)进行水泥混凝土路面及沥青路面结构,厚度设计,水泥混凝土路面级构组合设计、板厚度设计、接缝设计等，并比选按方案。22交通量分析·《公路工程技术标准》规定：四车道高速公路应能适应将各种汽车折合成小客车的年平均日交通量25000-55000辆六车道高速公路应能适应将各种汽车折合成小客车的年平均日交通量45000-80000辆八车道高速公路应能适应将各种汽车折合成小客车的年平均日交通量60000-100000辆表2-1交通量及换算系数车型小客车SH-130大客车SH-141跃进牌NJ-131东风牌EQ-140黄河牌JN-150日野KB222太脱拉138交通量（辆/日）8761694722702708177换算系数1.02.02.02.02.02.02.0换算交通量（pcu/d）9121736473444208694将上表折成小客车，对所给交通量进行换算：N=912+173×1.5+（647+344+420+86+94）×2=4353.5,设计年限为30年时，N=Nd=N0×(1+γ)n-1远期交通量32690辆，故设计为四车道高速公路即可满足交通量要求。3沥青路面设计⑴设计年限内车道的累计轴次根据《公路沥青路面设计规范》规定..路面设计以双轮组单轴载100KN为标准轴载。标准轴载的计算参数按表3-1确定表3-1标准轴载计算参数标准轴载名称BZZ-100标准轴载名称BZZ-100标准轴载P（KN）100单轮当量圆直径d（mm）21.30轮胎接地压强P（Mpa）0.70两轮中心距（cm）1．5d①轴载换算（弯沉及沥青层弯拉应力分析）当以设计弯沉值设计指标及沥青基层层底拉应力验算时，凡前、后轴轴载大于25kN的各级轴载iP的作用次数in均换算成标准轴载P的当量作用次数N。335.4211)(ppnCCNiiKi式中：N—以设计弯沉值和沥青层层底拉应力为指标时的标准轴载的当量次数；in—被换算车型的各级轴载换算次数（次/日）；P—标准轴载（kN）；iP—各种被换算车型的轴载（kN）；C1—轮组系数，单轮组为6.4,双轮组为1.0,四轴组为0.38；C2—轴数系数。K—被换算车型的轴载级别。当轴间距离大于3m时，按单独的一个轴载计算；当轴间距离小于3m时，双轴或多轴的轴数系数按下面公式计算：111.21Cm式中：m—轴数。则其设计年限内一个车道上的累计量轴次eN：1[(1)1]365teNN式中eN—设计年限内一个车道的累计当量次数；t—设计年限，由材料知，t=15年；1N—设计端竣工后一年双向日平均当量轴次；—设计年限内的交通量平均增长率，由材料知，γ=0.072；—车道系数，由材料知η=0.45。则：次383949445.032.3986072.0365]1)072.01([365]1)1([151NNte次②轴载换算（半刚性层弯拉应力分析）验算半刚性基层层底拉应力的累计当量轴次时，凡轴载大于50KN的各级轴载iP的作用次数in均按下式换算成标准轴载P的当量作用次数'N。8'21'1')(ppnCCNiiKi式中：'N—以设计弯沉值和沥青层层底拉应力为指标时的标准轴载的当量次数；4in—被换算车型的各级轴载换算次数（次/日）；P—标准轴载（kN）；iP—各种被换算车型的轴载（kN）；'1C—轮组系数，双轮组为1.0，单轮组为18.5，四轮组为0.09。'2C—轴数系数；则其设计年限内一个车道上的累计量轴次'eN为：295506945.054.11411072.0365]1)072.01([365]1)1([151NNte次。⑵确定路面等级和面层类型路面等级、面层类型应与公路等级、交通量相适应。路面等级、面层类型的选择应根据公路等级与使用要求、设计年限内标准轴载的累积当量轴次、筑路材料和施工机械设备等因素按下表确定。⑶土基回弹模量的确定路段位于平原微丘区,公路自然区划为Ⅱ2区,地震烈度为六级,设计标高240.50m,地下水位1.45m。由《公路沥青路面设计规范》JTGD50-2004附录F知此高度为H2（2.0），属于中湿路基⑷路面结构方案设计①方案一***************************新建路面设计成果文件汇总***************************一、轴载换算及设计弯沉值和容许拉应力计算序号车型名称前轴重(kN)后轴重(kN)后轴数后轴轮组数后轴距(m)交通量1交通SH14125.5555.11双轮组1732跃进NJ13120.238.21双轮组6473东风EQ14023.769.21双轮组3444东风KM34049101.61双轮组6005表3-2车型载重一个车道上大客车及中型以上的各种货车日平均交通量Nh=503,属轻交通等级当以设计弯沉值和沥青层层底拉应力为指标时:路面营运第一年双向日平均当量轴次:916设计年限内一个车道上的累计当量轴次:3839494属中等交通等级当以半刚性材料结构层层底拉应力为设计指标时:路面营运第一年双向日平均当量轴次:705设计年限内一个车道上的累计当量轴次:2955069属轻交通等级路面设计交通等级为中等交通等级公路等高速公路公路等级系数1面层类型系数1路面结构类型系数1路面设计弯沉值:28.9(0.01mm)表3-3劈裂强度容许拉应力层位结构层材料名称劈裂强度(MPa)容许拉应力(MPa)1细粒式沥青混凝土1.40.552中粒式沥青混凝土1.00.403粗粒式沥青混凝土0.80.324水泥稳定碎石0.60.335级配碎石0.35黄河JN15045.1101.51双轮组4206日野KB22250.2104.31双轮组867太脱拉13851.4802双轮组394设计年限15车道系数0.4566粗砂0二、新建路面结构厚度计算新建路面的层数:6标准轴载:BZZ-100路面设计弯沉值:28.9(0.01mm)路面设计层层位:5设计层最小厚度:150(mm)表3-4厚度计算层位结构层材料名称厚度(cm)抗压模量(MPa)(20℃)抗压模量(MPa)(15℃)容许应力(MPa)1细粒式沥青混凝土4140020000.552中粒式沥青混凝土6120016000.43粗粒式沥青混凝土1290012000.324水泥稳定碎石15150015000.335级配碎石?5505506粗砂1501001507新建路基15036按设计弯沉值计算设计层厚度:LD=28.9(0.01mm)H(5)=150mmLS=30.6(0.01mm)H(5)=200mmLS=28(0.01mm)H(5)=182mm(仅考虑弯沉)按容许拉应力计算设计层厚度:H(5)=182mm(第1层底面拉应力计算满足要求)H(5)=182mm(第2层底面拉应力计算满足要求)H(5)=182mm(第3层底面拉应力计算满足要求)H(5)=182mm(第4层底面拉应力计算满足要求)路面设计层厚度:H(