湖区桩基极限挤压冰力计算研究

Calculation of ultimate extrusion ice force of pile foundation in lake area

现行JTS 144-1—2010《港口工程荷载规范》提出了海冰和河冰的极限挤压冰力计算公式,但是规范中没有针对大面积淡水湖区的计算公式。基于实际工程,通过对比分析国内相关行业规范针对极限挤压冰力的计算公式,并结合数值模型实验得出,利用《港口工程荷载规范》的河冰公式计算得出的极限挤压冰力偏小,而海冰公式计算得出的极限挤压冰力偏大,根据现行JTG D60—2015《公路桥涵设计通用规范》得出的极限挤压冰力与数学模型模拟值基本一致。因此对于大面积淡水湖区极限挤压冰力的计算可以参考《公路桥涵设计通用规范》中的计算公式。该研究为计算大面积淡水湖区极限挤压冰力提供一定的依据,为修订规范时提供参考。

The current JTS 144-1—2010 Port Engineering Load Code puts forward the calculation formula for the ultimate extrusion ice force of sea ice and river ice,but there is no calculation formula for large freshwater lake area in the code.Based on practical projects,this paper makes a comparative analysis of the calculation formulas of the ultimate extrusion ice force in relevant domestic industry codes,and combines with numerical model experiments to conclude that the ultimate extrusion ice force calculated by using the river ice formula of Port Engineering Load Code is small,but by the sea ice formula is large.According to the current JTG D60—2015 General Code for Design of Highway Bridges and Culverts,the ultimate extrusion ice force is basically consistent with the simulated value of the mathematical model.Therefore,the calculation formula in General Code for Design of Highway Bridges and Culverts can be referred to for the calculation of the ultimate extrusion ice force in large freshwater lakes.This study provides a basis for the calculation of the limit ice extrusion force in large freshwater lakes,and provides a reference for the revision of specifications.