岩土工程学报2016，Vol.38Issue(10)：1889-1894,6.DOI:10.11779/CJGE201610019
高压力作用下深部黏土冷却过程及其特征研究
Effects of high pressure on cooling process of clays in deep alluvium
摘要
Abstract
Considering thatlarge earth pressure will influence the strength and the stability of frozen wall by means of changing soil frozen temperature and its cryo-structure, a series of cooling process tests on clays from the deep stratum with different water contents and applied pressures prior to freezing are performed to study their cooling process characteristics. The aim of the tested samplessubjected toa certain pressureis to simulate the earth pressureofthe freezing ground. In order to reduce the error of thetesting system,theinitial temperatures of the tested samples prior to being frozen are 5°C, and the ultimate temperatures after being frozen are–10℃. The results show that the frozen temperature, initial frozen temperature and super-cooling degree closely relate to thesufferedapplied pressureofthe tested soils.No matter the soils are saturated the frozen temperature decreases with the increase of the applied pressure, while the initial frozen temperature shows a fluctuation with the change oftheapplied pressure. Applying the crystallization theory of materials,it is concluded that the freezing processof soilsmainly relates to the phase-change process of void free water. The applied pressure will change the adsorption capacity of soil particles to water molecules to influence the amount of free water in soils, and further change their latent heat releasing during crystallization. As a result,the applied pressure in freezing process of soils in fluences theircryo-structure.关键词
深部黏土/冻结过程/高压力/冻结温度/过冷度Key words
deepclay/freezing process/high pressure/frozen temperature/supercooling degree分类
建筑与水利引用本文复制引用
王大雁,马巍,王永涛,温智..高压力作用下深部黏土冷却过程及其特征研究[J].岩土工程学报,2016,38(10):1889-1894,6.基金项目
国家自然科学基金面上项目（41671069）；国家自然科学基金项目（41630636）；冻土工程国家重点实验室基金项目 （）
