混凝土水化热对人工冻土墙温度场分布的影响

Re-distribution of temperature field of artificial ice wall affected by heat of concrete hydration

研究了在人工冻土墙形成并达稳定温度场分布呈非线性后 ,基坑开挖并浇注大体积混凝土衬砌时 ,混凝土水化热对人工冻土墙温度场分布的影响 ,分析得出了受影响区域内冻土墙被融化及重新冻结的过程 .在内衬混凝土水化热的作用下 ,冻土墙温度场会发生非线性的变化过程 ,沿径向受影响冻土墙上的不同点 ,温度变化规律是相似的 ;同时 ,在冻结管所提供冷源的作用下 ,解冻的冻土墙部分又会重新冻结 .

This paper focuses on studies of distribution of temperature field of artificial ice wall affected by heat transfer of concrete hydration while a pit excavating and then pouring mass concrete liner when temperature field of artificial ice wall is forming. The course of thawing and refreezing within the artificial ice wall affected by heat transfer of concrete hydration is analysed. Affected by heat transfer of concrete hydration, the change of temperature field of artificial ice wall is nonlinear and the varieties of temperature are similar along radial of artificial ice wall. At the same time, the thawed artificial ice wall is refreezed by refrigeration tube.