AC-20
粗粒式沥青混凝土
AC-25
7
1000
0.23
二灰结石
30
1500
0.32
二灰土
？
750
0.09
土基
-
30
-
7、确定二灰土层厚度（换算成三层体系）
h
1
=4cm E
1
=1400Mpa → h
1
=4cm E
1
=1600Mpa
h
1
=6cm E
2
=1200Mpa
h
1
=7cm E
3
=1000Mpa
h
1
=30cm E
4
=1500Mpa H=? E
2
=1200Mpa
h
1
=? E
5
=750Mpa
E
0
=30Mpa E
0
=30Mpa
路表容许回弹弯沉值
L
R
=[l]=1.1α
r
α
s
/
N
0.2
=1.1×1.2×1.0/24000000
0.2
=0.044cm
路表回弹弯沉综合修正系数
F=A
F
=φ
1
=1.47 （ [l] E
n
/
（
2p
t
r））
0.38
=1.47×=0.585
α
L
==αn
1
n
2
==3.531
h=h
1
=4cm
E
1
=1400Mpa
H=H
2
+
E
2
=1200Mpa
∴查表得α=6.3
∴查表得K
1
=1.52
∴K
2
===0.369
∴查表得：=5.6
∴H=6.5δ=6.5×10.65=59.64cm
根据
H=H
2
+
69.22=6+7×+30×+ h
1
∴h
1
=17.307cm 取h
1
=18cm
8 弯拉应力验算
A点 细粒式沥青混凝土层底
h
1
=4cm E
1
=1400Mpa → h=4cm E
1
=1400Mpa
h
1
=6cm E
2
=1200Mpa
h
1
=8cm E
3
=1000Mpa
h
1
=30cm E
4
=1500Mpa H=? E
2
=1200Mpa
h
1
=18cm E
5
=750Mpa
E
0
=30Mpa E
0
=30Mpa
H==6+8×+30×+18×=60.83
5cm
38
.
0
0
2
δ
P
E
L
R
38
.
0
65
.
10
7
.
0
2
30
044
.
0
×
×
×
F
P
E
L
d
δ
2
1
585
.
0
65
.
10
7
.
0
2
1400
022
.
0
×
×
×
×
4
.
2
2
1
3
E
E
h
k
n
k
k
∑
−
=
=
=
=
=
86
.
0
1400
/
1200
/
38
.
0
65
.
10
/
4
/
1
2
E
E
h
δ
=
=
=
=
025
.
0
1200
/
30
/
38
.
0
65
.
10
/
4
/
2
E
E
h
n
δ
1
K
L
α
α
52
.
1
3
.
6
531
.
3
×
δ
H
4
.
2
2
1
3
E
E
h
k
n
k
k
∑
−
=
4
.
2
1200
1000
4
.
2
1200
1500
4
.
2
1200
750
9
.
0
1
1
2
+
−
=
∑
i
k
n
k
k
E
E
h
9
.
0
1200
1000
9
.
0
1200
1500
9
.
0
1200
750