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冰川冻土  1998 

饱水砂层中结构的融沉附加力研究

, PP. 120-123

Keywords: 饱和砂层,冻融,结构,融沉附加力

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Abstract:

在试验研究的基础上,探讨了饱水砂层的竖向冻结及融化过程土中结构切向受力的变化.试验结果表明,冻结饱和砂土融化过程可分为负温升温、相变和自由水温升3个阶段;与此对应,融化沉降过程可分为开始、急降和缓降3个阶段;而模型结构切向应力则经历了上升、陡降和缓降3个过程;最终模型受有切向融沉压缩附加应力.这对于进一步研究季节性冻土中的结构受力、冻结井井壁应力历史以及井壁裂漏颇有意义.

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