六、墙后土压力计算已知信息
水的重度γ:10.25KN/m 3
9.8
N/kg α
0码头后填料:块石
17KN/m 3
填料水下重度10
4.445
m
Kan ==
0.172沉箱顶面以下考虑δ=φ/3=
15
°
tg δ=0.267949
Kan =
Kax ==0.15455Kay ==
0.04141
E H
=
(e n1+e n2)h n /2cos α
E V =E H tg δcos α=1
<1>码头后填料土压力1.极端高水位
e 4.5=0.00e 3.68= 2.39kpa
0.98061e 1.4= 6.30kpa 9.91266e 1.4’=
5.68kpa
e -18
=32.14kpa
366.804
土压力引起的水平向作用
E H =377.70KN/m M EH =2951.605825E V
=101.20KN/m M EV
=
1862.147258
2.设计高水位
e 4.5
=0.00e 2.64= 5.43kpa 5.04537e 1.4=7.55kpa 8.04622e 1.4’=
6.80kpa
e -18
=34.87kpa
404.222
土压力引起的水平向作用
E H =417.31KN/m M EH =3308.788109E V
=111.82KN/m M EV =
2057.466053
2.设计低水位
e 4.5
=0.00E H
e 1.4
=
9.04kpa
14.0149
矩形仓的横截面内缘的最大边长L:tg 2(45°-φ/2)0.16Kancos(δ+α)重力加速度g:填料重度γ:e n2=
e n1=(一)码头后填料土压力
e 1.4’=8.14kpa e 0.2=
11.30kpa
11.6653e -18
=39.43kpa
461.577
土压力引起的水平向作用
E H =487.26KN/m
M EH =3929.227519E V
=
130.56KN/m
M EV
=
2402.305048
e 4.5~1.4=8.578644kpa
e 1.4~-18=7.727407kpa 水平作用176.5055KN/M
26.59379566149.9116882
竖向作用
Eq V =47.2945KN/M 倾覆力矩
M EH =
3465.427KN.m M EV =
870.2188KN.m
(二)堆货荷载土压力Eq H
=
(三)门机荷载土压力
°
KN/m3填料内摩擦角φ:45°
KN.m
KN.m
KN.m
KN.m
KN.m KN.m