摘要
本文对冻粘土试件进行了三轴蠕变试验,得到了复杂应力状态下冻粘土的蠕变方程及蠕变参数的数值。根据冻土的流变理论,探讨了塑粘区的扩展规律,最后推导出了冻结壁厚度计算公式和变形速率公式。同时,又进一步探讨了防止冻结管断裂的有效途径。
The triaxle creep tests of the frozen clay have been carried out so that creep parameters are obtained in the condition of the complex stress states. According to the rhelogical theory of frozen soil,the developing regularity of
the viscoplastic region has been approached and the formulas have been derived to calculate the thickness of the frozen wall and displacement speed. The best effective methods are set forth to prevent the fracture of the frozen pipes at the same time.
关键词
强度
蠕变
冻结壁
厚度
凿井
frozen soil
frozen Wall
frozen pipe
creep
rheological theory
