小直径钢管排桩锚固深度的确定及验算

结合抗拔和受弯曲条件共同确定钢管桩的理论锚固深度,并建立了锚固深度的验算模式。以广巴(广元—巴中)高速公路一工点为例,确定了小直径钢管排桩的理论锚固深度为5 m。采用K法计算锚固段的内力和变形并采用理论锚固深度对钢管桩锚固段进行抗拔、抗压、水平抗力和最大弯矩验算,均能满足验算条件,确定出最终锚固深度为5 m。运用数值分析的方法验证该最终锚固深度是合理的。

Determination and Checking of Anchorage Depth of Small-diameter Steel Pipe Piles

The theoretical anchorage depth of steel pipe piles was determined by combining with pull-out and bending conditions,and the checking model of anchorage depth was established.Taking Guangyuan-Bazhong expressway as an example,the theoretical anchorage depth of small-diameter steel pipe piles was determined to be 5 m.K method was used to calculate the internal force and deformation of the anchorage section,the theoretical anchorage depth was used to check the pull-out,compression,horizontal resistance and maximum bending moment of the steel pipe pile anchorage section,which can satisfy the checking condition,and the f inal anchorage depth was determined to be 5 m.The numerical analysis method,which is used to verify the f inal anchorage depth,is reasonable.