[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa二、单排桩桩基算例设计资料:某直线桥的排架桩墩由2根1.0m钢筋混凝土钻孔桩组成,混凝土采用C20,承台底部中心荷载:[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa,[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa ,[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa。其他有关资料如图所示,桥下无水。试求出桩身弯矩的分布、桩顶水平位移及转角(已知地基比例系数[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa,[ (R)_(a)] =dfrac (1)(2)(usum _(i=1)^n(a)_(i)(q)_(k)+(a)_(r)(A)_(r)(q)_(rk))-|||-=-13.14×0.377(0.7×2.3×45+3.14×0.377(0.7×2.3×45+0.98.6×55+0.6×2.7×53)+0.6×3.+0.6×2.7×53)+0.6×3.14×037-|||-=dfrac (1)(2)[ 1.18times (72.45+425.7+85.86)+147.27] -|||-=418.2kPa)