水泥混凝土搅拌桩沉降计算公式

项目名称：武汉至蔡甸高速公路工程计算孔号：SZK23里程桩号：1.基本参数输入：路堤设计高度路堤设计顶宽度路堤边坡坡度路面结构层厚度mmm22466.67%0.75地基软土层含水率水泥土无侧限抗压强度掺灰比由fu28换算fu90w/%fu28/Mpa%经验系数500.9140.752.搅拌桩复合土层的沉降计算结果：复合体层顶附加应力值复合体层底附加应力值桩长搅拌桩复合土层的压缩模量Pz/kPaPzl/kPaL/mEsp/kPa53.1825.041472750.48s1s2SZK260.0080.02110.028626069路面结构层重度路堤填料重度超载值超载分布宽度kN/m3kN/m3kPam221814.1817.9水泥土无侧限抗压强度fu90/Mpa1.20搅拌桩复合土层的沉降S1/m0.0083.搅拌桩复合土层的压缩模量计算：序号地基土层层厚/H地基土压缩模量/Esifcu90搅拌桩压缩模量mMPaMPa经验系数12-14.302.71.20110231.9081.2011032-11.402.71.20110431.4581.2011054-14.652.61.2011064-30.30121.20110加固深度内按土层厚度加权平均后复合土层的压缩模量/Esp（MPa）搅拌桩压缩模量/Epi置换率搅拌桩复合土层MPam压缩模量Espi/MPa132.000.53662772.09132.000.53662774.54132.000.53662772.09132.000.53662774.54132.000.53662772.04132.000.53662776.4072.75加固深度内按土层厚度加权平均后复合土层的压缩模量/Esp（MPa）4.复合土层顶底面附加应力计算：计算附加荷载组合厚度重度边坡坡率路基顶宽路基底宽应力位置H/mγ/kN/m3L1/mL2/m路面结构层0.752266.67%2425.00路堤埴料1.251866.67%25.0026.67汽车荷载***************叠加荷载Pz/kPa***************路面结构层0.752266.67%2425.00路堤埴料1.251866.67%25.0026.67汽车荷载***************叠加荷载Pzl/kPa***************复合体层顶z=0复合体层底z=L均布荷载部分大三角形荷载小三角形荷载计算深度大三角形荷载P1/kPaP/kPaP2/kPam引起的附加应力σ/kPa16.50412.5396.000412.522.50360337.500360*********0******************16.50412.5396.0014191.4022.50360337.5014174.41*********14******************小三角形荷载梯形荷载引起的附加应力超载分布宽度引起的附加应力σ2/kPaP3/kPam39616.5***337.522.5******14.1817.9***53.18***183.757.66***163.5110.90******6.4817.9***25.04***K1+620地基土层层厚/H管桩外径桩截面周长U桩截面面积侧摩阻端阻单桩承载力单桩承载力KN桩身折减系数η90天抗压强度fcmmmm2kPakPakN1150.401467.002-14.300.501.570.1963533.7731.900.501.570.19632574.612-11.400.501.570.1963511.0031.450.501.570.19632556.941.8764-14.650.501.570.19631073.04桩长/m13.70249.36复合承载力桩间距面积置换率单桩竖向承载力特征值桩面积桩间土折减系数桩间土承载力fspk(KPa)b(m)mRa(KN)Ap(m2)βKpa122.01534751.30.1341567581150.1963495410.51000.1963431.96964.79535桩截面面积Ap0.1963K1+620地基土层层厚/H管桩外径桩截面周长Ummm2-14.300.501.5731.900.501.572-11.400.501.5731.450.501.574-14.650.501.57桩长/m13.70复合承载力桩间距面积置换率单桩竖向承载力特征值fspk(KPa)b(m)mRa(KN)125.83158191.30.134156758162桩截面面积侧摩阻端阻单桩承载力单桩承载力KN桩身折减系数ηm2kPakPakN1620.330.1963533.770.19632574.610.1963511.000.19632556.940.19631073.04249.36桩面积桩间土折减系数桩间土承载力Ap(m2)βKpa0.1963495410.257090天抗压强度fc桩截面面积Ap2500.000.19631.876