松原市江心岛变截面组合桩抗冻拔技术研究

Study on frost-resistant uplift technology of variable cross-section built-up pile

松原市江心岛采用的变截面组合桩型结构，是强冻胀土地区较型荷载的桩基抗冻拔的一种新的实用桩型本文提出桩基在冬季水位变化条件下的抗冻拔计算方法，及其单位冻切力的取值，为今后同类工程设计提供了依据。

A vriable cross - section built - up pile structure was build in Songyuan city eyot. It is a new practicality pile foundation with lighter load and frost resistant uplift in the strong frost heave soil area. The paper puts forward a calculation method of frost resistant uplift following the change of water level in winter, and gives the choosing value of the unit frost shear force.