承载力设计依据公式Quk=Qsk+Qpk=u∑ψsiqsiklsi+ψpqpkAp (5.2.9)《建筑桩基技术规范》（JGJ94-94)根据地质报告桩端极限端阻力标准值qpk：卵石3300Kpa；漂石4000Kpa；砂岩5000Kpa。
桩端极限端大直径桩端桩基扩大头面积阻力标准值阻效应系数qpk（kPa）ψpAp(m2)ψp ＝(0.8/D)^(1/3)单桩竖向极限限承载力设向最大承载承载力标准值单桩竖向极单桩容许竖计值R(KN)力N(KN)扩大头直径D(m)桩身直径d(mm)d≧2(Q/π*fc*ψc)^(1/2)Quk(Kpa)Quk＝ψp *qpk * Ap泥岩3000Ap＝π*D^2/44.524.153.803.463.142.832.542.272.011.771.541.331.130.950.790.640.50R= Quk/λsp (λsp=1.65)N≦R/λ0(λ0=1.1)2.402.302.202.102.001.901.801.701.601.501.401.301.201.101.000.900.801100.001000.001000.001000.00900.00900.00900.00800.00800.00800.00800.00800.00800.00800.00800.00800.00800.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.004000.000.690.700.710.720.740.750.760.780.790.810.830.850.870.900.930.961.0012540.4111681.7010847.5310038.269254.298496.027763.917058.436380.085729.435107.084513.693949.983416.762914.922445.482009.607600.257079.826574.266083.795608.665149.104705.404277.833866.723472.383095.202735.572393.932070.761766.621482.111217.946909.326436.205976.605530.725098.784681.004277.643888.943515.203156.712813.822486.882176.301882.511606.021347.371107.22
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