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Erschienen in:
2018 | OriginalPaper | Buchkapitel
A Simple Equation for Predicting Freezing Point of Saline Soft Clay
verfasst von : Qinze Wang, Songhe Wang, Jilin Qi, Fengyin Liu, Peng An
Erschienen in: Proceedings of China-Europe Conference on Geotechnical Engineering
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Abstract
Brine leakage due to pipe fracture is threatening the safety of frozen wall in artificial freezing facilitated engineering and the performance of the produced frozen soils will be deteriorated with salt inclusion. This paper takes the frequently soft clay in Wujiang District as the study object and five levels of calcium chloride solutions were supplemented to produce saline specimens. The soil freezing point for specimens at various water-salt combinations was measured by the thermocouple. Results indicate that the freezing point exhibits nonlinear increase at higher water contents and a critical value may exist close to the liquid limit, beyond which the gradient of freezing point to the water content lowers. An approximately linear decrease with the saline content was observed. By fitting experimental data, an empirical equation was proposed for the freezing point affected by both water and saline contents. The results may provide guidance in engineering design and numerical modeling in frozen ground engineering.