Jacking force is a controlling factor in design and construction of pipe jacking. To date, there is few researches focused on prediction of jacking force in frozen ground. Therefore, this paper investigates the main geotechnical issues, including the jacking force and pipe-soil interaction of pipe jacking in frozen ground. Firstly, a series of numerical simulations and comparative analyses with theoretical solutions were conducted to discuss the surface friction force. Then, a new calculation model of jacking force under different pipe-soil interactions and characteristics of the frozen ground was proposed by considering the impact of temperature and the static friction rather than sliding friction. Finally, compared with the measured data obtained from pipe jacking operation in frozen ground in Japan, the jacking force predicted by using the proposed calculation model agreed well with the measured data. The new calculation model can simulate the jacking force in frozen ground more precisely than the conventional ones. The conclusions of this paper would provide reference for prediction of pipe jacking force in frozen soil area.

顶升力是顶管设计和施工中的一个控制因素。目前，针对冻土顶升力预测的研究较少。因此，本文研究了主要的岩土工程问题，包括冻土顶管的顶进力和管土相互作用。首先，通过一系列数值模拟和与理论解的对比分析来讨论表面摩擦力。然后，通过考虑温度和静摩擦而不是滑动摩擦的影响，提出了不同管土相互作用和冻土特征下顶升力的新计算模型。最后，与日本冻土顶管作业实测数据对比，使用提出的计算模型预测的顶升力与实测数据吻合良好。新的计算模型可以比传统模型更精确地模拟冻土中的顶升力。本文的研究结论可为冻土地区顶管力的预测提供参考。