混凝土水化热对深井冻结壁冻融规律影响的实测研究

煤炭工程 ›› 2011, Vol. 1 ›› Issue (10): 80-82.doi:

混凝土水化热对深井冻结壁冻融规律影响的实测研究

余波江¹,汪仁和²,李栋伟²,³

1. 安徽理工大学冻土研究所
2. 安徽理工大学土木建筑学院
3. 中煤南京设计研究院

收稿日期:2010-12-24 修回日期:2011-01-20 出版日期:2011-10-10 发布日期:2011-10-10
通讯作者: 余波江 E-mail:yubojiang0564@163.com

Field Study on Freeze-thaw Rule of Deep Freeze Walls by Heat of Concrete Hydration

Received:2010-12-24 Revised:2011-01-20 Online:2011-10-10 Published:2011-10-10

摘要/Abstract

摘要： 根据冻结井筒大体积混凝土水化热现场实测结果，获得混凝土水化热对冻结壁的影响规律：由于井壁混凝土水化热影响冻结壁融化0.2-0.4m，约为外壁厚度的0.43-0.5倍，重新冻结后产生回冻冻胀力0.45-0.80MPa。结合对实测数据的分析和ADINA有限元程序的数值模拟，得出了冻结壁融化深度与时间的关系曲线，对指导深井冻结壁设计与施工具有重要的指导意义。

关键词: 混凝土水化热, 深井冻结壁, ADINA FEM, 冻融温度场

Abstract: According to the hydration heat measured results of mass concrete in frozen shaft, the influence law of the concrete hydration heat to the frozen wall could be obtained: the sidewall concrete hydration heat affected the melting of frozen wall 0.2-0.4m, about 0.43-0.5 times of the wall thickness, then the refreezing frost-heaving force were emerged after re-freezing, about 0.45-0.80MPa. Combined with the measured data analysis and finite element program ADINA simulation, which Obtained the relation curves between frozen wall melt depth and time, it had great guiding significance in the design and construction of deep frozen wall.

Key words: hydration heat, frozen wall, FEM soft ADINA, Freeze-thaw temperature field