常用大管桩规格、型号和力学指标表表J=大管桩型号D1200A3-1*D 1200A 3-2D1200B1-1*D1200B1-2*D1200B2-1D1200B2-2D1200C11*D1400B3-1*D1400B3-2D1400C31*大 管桩 外径 D（mm）1200120012001200120012001200140014001400大 管桩 内径 d（mm）940940910910910910910110011001100桩 截面 积A（m2）0.4370.4370.4810.4810.4810.4810.4810.5890.5890.589单 位长 度重 量T（kN/ m）111.3611.3612.5012.5012.5312.5312.6215.3215.3215.47桩截面惯性矩J（m4）0.06510.06510.07060.07060.07090.07090.07180.12100.12100.1232预 留孔 数20201616181816202020预 留孔 直径32324040404040404040(mm)钢绞线股数51122223223股钢绞线直径(mm)15.25.215.215.25.25.215.215.25.215.20钢 绞线 抗拉 强度 标准 值ptk (MPa1570860157018605708601570157086015701混凝土有效预压应力O pc(MPa5.96.18 78.6410.419.741.7312.808.810.6213.052不含混凝土抗拉强度的开裂弯64678 710171224151386153215248362298矩设计值(kN?m)3混凝 土抗 拉强 度的 开裂 弯矩 设计值(kN?m)1032164143616445728071959213945029234破 坏弯 矩设 计值(kN?m)I2300300 225982597639 2638 227603783781 34022