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评价了中国主要的冻胀压力分析模型,在存水空间模型的基础上,分析了冻胀水体的形变约束特征,提出了冻胀压力类似于气体压力的约束冻胀模型,并给出了相应的理论分析公式;计算分析了冻胀压力的作用位置、冻胀水体尺度、围岩和衬砌刚度等对衬砌结构安全度的影响及分布规律。结果表明:该模型表现了冻胀压力为局部荷载的特征,同时考虑了衬砌和围岩刚度对冻胀压力的影响,并可模拟存水空间内的冻胀水体为任何多面体形状;增加衬砌刚度仍是提高衬砌抗冻能力的有效措施。
The main frost heave pressure analysis model in China was evaluated. Based on the reservoir space model, the deformation restraint characteristics of frost heave water bodies were analyzed, and the frost heaving model with frost heave pressure similar to the gas pressure was proposed. Correspondingly, The influence of frost heaving pressure, the scale of frost heaving water, the rigidity of surrounding rock and lining on the safety of lining structure are analyzed and analyzed. The results show that the model shows the characteristics of frost heave pressure as local load, considering the influence of lining and surrounding rock stiffness on frost heave pressure and simulating the shape of frost heaving water body as any polyhedron, and increasing the lining stiffness It is still an effective measure to improve lining antifreeze ability.