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1、（一）.特重交通（ 不包括高速公路）城市快速路、货运主干路 Ne=45*106 (次/车道) E0 =30MPa fr =5.0MPa EC = 31GPa 基层 h1 =20cm 二灰碎石 E1=1400MPa (6:14:80) 底基层 h2 =20cm 二灰砂砾 E2=1200MPa (7:13:80) Ex=E1h12+E2h22/ h12+h22 =(1400*0.22+1200*0.22)/(0.22+0.22) =1300 a=6.221-1.51（1300/30）-0.45=4.497 b=1-1.44(1300/30)-0.55=0.819 Dx=(E1h13+E2h23)/
2、12+(h1+h2)2/4*(1/h1E1+1/h2E2)-1 =(1400*0.23+1200*0.23)/12+0.42/4*(1/0.2*1400+1/0.2*1200)-1 =6.903 hx=(12Dx/Ex)1/3=(12*6.903/1300)1/3=0.3994 Et=ahxb* E0(Ex/E0)1/3=4.497*0.39940.819*30(1300/30)1/3=223.520 砼板相对刚度半径 r=0.537h(Ec/Et)1/3 设板厚 h=25cm r=0.537*0.25(31000/223.520)1/3=0.695 PS =0.077r0.6*h-2=0.0
3、77*0.6950.6*0.25-2=0.9903 kr=0.87 kf=Ne0.057=2.730 kc=1.25 Pr =kr*kf*kc*PS=0.87(45*106)0.057*1.25*0.9903=2.941 设板长 L=5m L/r=7.2 查图B.2.2 Bx=0.63 北京地区最大温度梯度按城市道路设计规范表10.2.8 Tg=80/m tm =(10-5*EC*h* Tg*Bx)/2=(10-5*31000*0.25*80*0.63)/2=1.953 按公路水泥混凝土路面设计规范表B.2.3 回归系数 a=0.828 b=0.041 c=1.323 kt= fr/tma(t
4、m / fr)c-b=5/1.9530.828(1.953 /5)1.323-0.041 =0.5062 tr=kt*tm =0.5062*1.953=0.989 可靠度系数根据公路水泥混凝土路面设计规范表3.0.3采用1.23 1.23（0.989+2.941）=4.834 MPafr =5.0 MPa 可（二）.特重交通高速公路 Ne=45*106 (次/车道) E0 =30MPa fr =5.0MPa EC = 31GPa 基层 h1 =20cm 二灰碎石 E1=1400MPa (6:14:80) 底基层 h2 =20cm 二灰砂砾 E2=1200MPa (7:13:80) Ex=E1h
5、12+E2h22/ h12+h22 =(1400*0.22+1200*0.22)/(0.22+0.22) =1300 a=6.221-1.51（1300/30）-0.45=4.497 b=1-1.44(1300/30)-0.55=0.819 Dx=(E1h13+E2h23)/12+(h1+h2)2/4*(1/h1E1+1/h2E2)-1 =(1400*0.23+1200*0.23)/12+0.42/4*(1/0.2*1400+1/0.2*1200)-1 =6.903 hx=(12Dx/Ex)1/3=(12*6.903/1300)1/3=0.3994 Et=ahxb* E0(Ex/E0)1/3=
6、4.497*0.39940.819*30(1300/30)1/3=223.520 砼板相对刚度半径 r=0.537h(Ec/Et)1/3 设板厚 h=27cm r=0.537*0.27(31000/223.520)1/3=0.7505 PS =0.077r0.6*h-2=0.077*0.75050.6*0.27-2=0.8892 kr=0.87 kf=Ne0.057=2.730 kc=1.30 Pr =kr*kf*kc*PS=0.87(45*106)0.057*1.30*0.8892=2.746 设板长 L=5m L/r=6.662 查图B.2.2 Bx=0.57 北京地区最大温度梯度按城市道
7、路设计规范表10.2.8 Tg=76/m tm =(10-5*EC*h* Tg*Bx)/2=(10-5*31000*0.27*76*0.57)/2=1.813 按公路水泥混凝土路面设计规范表B.2.3 回归系数 a=0.828 b=0.041 c=1.323 kt= fr/tma(tm / fr)c-b=5/1.8130.828(1.813 /5)1.323-0.041 =0.4836 tr=kt*tm =0.4836*1.813=0.877 可靠度系数根据公路水泥混凝土路面设计规范表3.0.3采用1.33 1.33（0.877+2.746）=4.819 MPafr =5.0 MPa 可（三）
8、.特重交通（ 不包括高速公路）城市快速路、货运主干路 Ne=35*106 (次/车道) E0 =30MPa fr =5.0MPa EC = 31GPa 基层 h1 =20cm 二灰碎石 E1=1400MPa (6:14:80) 底基层 h2 =20cm 二灰砂砾 E2=1200MPa (7:13:80) Ex=E1h12+E2h22/ h12+h22 =(1400*0.22+1200*0.22)/(0.22+0.22) =1300 a=6.221-1.51（1300/30）-0.45=4.497 b=1-1.44(1300/30)-0.55=0.819 Dx=(E1h13+E2h23)/12+
9、(h1+h2)2/4*(1/h1E1+1/h2E2)-1 =(1400*0.23+1200*0.23)/12+0.42/4*(1/0.2*1400+1/0.2*1200)-1 =6.903 hx=(12Dx/Ex)1/3=(12*6.903/1300)1/3=0.3994 Et=ahxb* E0(Ex/E0)1/3=4.497*0.39940.819*30(1300/30)1/3=223.520 砼板相对刚度半径 r=0.537h(Ec/Et)1/3 设板厚 h=24cm r=0.537*0.24(31000/223.520)1/3=0.667 PS =0.077r0.6*h-2=0.077*
10、0.6670.6*0.24-2=1.0485 kr=0.87 kf=Ne0.057=2.692 kc=1.25 Pr =kr*kf*kc*PS=0.87(35*106)0.057*1.25*1.0485=3.069 设板长 L=5m L/r=7.495 查图B.2.2 Bx=0.64 北京地区最大温度梯度按城市道路设计规范表10.2.8 Tg=82/m tm =(10-5*EC*h* Tg*Bx)/2=(10-5*31000*0.24*82*0.64)/2=1.952 按公路水泥混凝土路面设计规范表B.2.3 回归系数 a=0.828 b=0.041 c=1.323 kt= fr/tma(tm
11、 / fr)c-b=5/1.9520.828(1.952 /5)1.323-0.041 =0.506 tr=kt*tm =0.506*1.952=0.988 可靠度系数根据公路水泥混凝土路面设计规范表3.0.3采用1.23 1.23（0.988+3.069）=4.990 MPafr =5.0 MPa 可（四）.特重交通高速公路 Ne=35*106 (次/车道) E0 =30MPa fr =5.0MPa EC = 31GPa 基层 h1 =20cm 二灰碎石 E1=1400MPa (6:14:80) 底基层 h2 =20cm 二灰砂砾 E2=1200MPa (7:13:80) Ex=E1h12+
12、E2h22/ h12+h22 =(1400*0.22+1200*0.22)/(0.22+0.22) =1300 a=6.221-1.51（1300/30）-0.45=4.497 b=1-1.44(1300/30)-0.55=0.819 Dx=(E1h13+E2h23)/12+(h1+h2)2/4*(1/h1E1+1/h2E2)-1 =(1400*0.23+1200*0.23)/12+0.42/4*(1/0.2*1400+1/0.2*1200)-1 =6.903 hx=(12Dx/Ex)1/3=(12*6.903/1300)1/3=0.3994 Et=ahxb* E0(Ex/E0)1/3=4.4
13、97*0.39940.819*30(1300/30)1/3=223.520 砼板相对刚度半径 r=0.537h(Ec/Et)1/3 设板厚 h=26cm r=0.537*0.26(31000/223.520)1/3=0.7227 PS =0.077r0.6*h-2=0.077*0.72270.6*0.26-2=0.9374 kr=0.87 kf=Ne0.057=2.6916 kc=1.30 Pr =kr*kf*kc*PS=0.87(35*106)0.057*1.30*0.9374=2.854 设板长 L=5m L/r=6.918 查图B.2.2 Bx=0.587 北京地区最大温度梯度按城市道路
14、设计规范表10.2.8 Tg=78/m tm =(10-5*EC*h* Tg*Bx)/2=(10-5*31000*0.26*78*0.587)/2=1.845 按公路水泥混凝土路面设计规范表B.2.3 回归系数 a=0.828 b=0.041 c=1.323 kt= fr/tma(tm / fr)c-b=5/1.8450.828(1.845 /5)1.323-0.041 =0.489 tr=kt*tm =0.489*1.845=0.902 可靠度系数根据公路水泥混凝土路面设计规范表3.0.3采用1.33 1.33（0.902+2.854）=4.995 MPafr =5.0 MPa 可（五）.重交通城市快速路、城
