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1、钢护筒长度计算书0#台:0#台的12根桩直径为1.2m,采用内径为1.5m的钢护筒,壁 厚 1mm。每延米自重为:W=0.02466 x (D-t) x t=0.02466 x 10 x (1520-10)=297.89Kg/m ;采用下面的公式(人民交通出版社的桥涵)计算:钢护筒的入土深度 L=( H + h )r -Hr /( r-r )=( 2.73x11-1.13I、一L/ w 0 d w, x10 )/(16.83-11) = 3.21m.安全系数取 2.0 钢护筒的实际长度为:L=3.21x2.0=6.43m 注:h = 1.0+0.6=1.6m;(水头+潮差)H=0.8+0.33
2、 = 1.13m;(水均高潮差+海底高差)淤泥的饱和容重:rd= ( +e )x r0/ ( 1+ e ) = ( 2.58+1.501 )x 10/(1+1.501) = 16.32KN/m3;砂土的饱和容重:rd= ( +e )x r0/ ( 1+ e ) = ( 2.65+1.0 )x 10/(1+1.0) = 18.25KN/m3;平均容重:rd=( ridL/2 L.)= (16.32*13.47+18.25*4.8)/(13.47+4.8) = 16.83 KN/m3; 其中:淤泥的厚度为:13.47m ;砂土厚度为:4.8m ;护壁泥浆比重取1.1钢护筒的总长:L=1.6+0.3
3、3+6.43=8.36m1#墩:1#墩的6根桩直径为1.2m,采用内径为1.5m的钢护筒,壁厚 1mm。每延米自重为:W=0.02466 x (D-t) x t=0.02466 x 10 x (1520-10)=297.89Kg/m ;采用下面的公式(人民交通出版社的桥 涵)计算:钢护筒的入土深度 L=( H + h)r -Hr/(r-r )=( 3.84x11-2.24 w 0 d wx10 )/(17.07-11) = 3.27m.安全系数取 2.0钢护筒的实际长度为:L=3.27x2.0=6.53m注:h = 1.0+0.6=1.6m;(水头+潮差)H=0.8+1.44=2.24m;(水
4、均高潮差+海底高差)淤泥的饱和容重:rd= ( +e )x r0/ ( 1+ e ) = ( 2.58+1.501 )x 10/(1+1.501) = 16.32KN/m3;砂土的饱和容重:rd= ( +e )x r0/ ( 1+ e ) = ( 2.65+1.0 )x 10/(1+1.0) = 18.25KN/m3;平均容重:rd= (2ridLi/2L.) =(16.32*8.76+18.25*5.6)/14.36= 17.07 KN/m3;其中:淤泥的厚度为:8.76m ;砂土厚度为:5.6m ;护壁泥浆比重取1.1钢护筒的总长:L=1.6+1.44+6.53=9.57m2-10#墩 桩
5、直径为1.2m采用内径为1.5m的钢护筒壁厚10mm , 每延米自重为297.89Kg/m。墩位于深水中并且淤泥层很厚,淤泥的饱和容重:rd=(A+e )xr0A 1+ e)=( 2.58+1.501 *10/(1+1.501) = 16.32KN/m2#墩:采用下面的公式(人民交通出版社的桥涵)计算:护筒的入土深度:L=(H + h)rw-Hr0/(rd-rw)=3.97m钢护筒的实际长度为:L=3.97x2.0=7.95m钢护筒的总长:L=1.6+3.54+7.95 = 12.29m3#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) =4.22ml w0dw钢
6、护筒的实际长度为:L=4.22x2.0=8.43m钢护筒的总长:L=1.6+4.83+8.43.=14.06m4#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) =4.29ml w0dw钢护筒的实际长度为:L=4.29x2.0=8.58m钢护筒的总长:L=1.6+5.21+8.58=14.59m5#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) =4.33ml w0dw钢护筒的实际长度为:L=4.33x2.5=8.66m钢护筒的总长:L=1.6+5.43+8.66=14.89m6#墩:护筒的入土深度:L=(H + h)rw-Hr0/(
7、rd-rw)=4.29m钢护筒的实际长度为:L=4.29x2.0=18.58m钢护筒的总长:L=1.6+5.21+8.58=14.59m7#墩:护筒的入土深度:L=(H + h)rw-Hr0/(rd-rw)=4.21m钢护筒的实际长度为:L=4.21x2.0=8.43m钢护筒的总长:L=1.6+4.82+8.43 = 14.05m8#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) = 3.98m l / w 0 d w钢护筒的实际长度为:L=3.98x2.0=7.96m钢护筒的总长:L=1.6+3.98+7.96=12.33m9#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) = 3.76m l / w 0 d w钢护筒的实际长度为:L=3.76x2.0=7.5m钢护筒的总长:L=1.6+2.38+7.05 = 10.69m10#墩:护筒的入土深度:L= ( H + h ) r -Hr / ( r-r ) = 3.52m l / w 0 d w钢护筒的实际长度为:L=3.52x2.0=7.05m钢护筒的总长:L=1.6+1.15+7.05=9.0m钢护筒共计:856.60钢护筒总重为:856.0x297.89=255180Kg=255.18t