立井冻结法凿井工程中的热工计算  

Approximate Calculating Method of Some Design Parameters in Drilling Shaft of Artificial Freezing

作　　者：李述训[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所冻土工程国家重点实验室

出　　处：《冰川冻土》1994年第1期20-30,共11页Journal of Glaciology and Geocryology

摘　　要：本文在分析有关实测资料的基础上，应用近似方法求解了二类边界条件下有相变的平面轴对称的热传导方程，给出了人工冻结凿井设计中用以确定冻结壁交圈时间的相邻两冻结管周围冻结土体轴向相交接的时间、冻结壁形成变化规律、冻结壁平均温度和内外冻结壁厚度关系的近似计算公式。将计算结果与实测资料比较表明，文中所给计算方法和公式有较高的精度。In this paper，meheat transfre equation of the plane axisymmetrical problem with phase change is approximately solved under second boundary conditon，based on analysising actual bserved data，and it is obtained that the time linked together freezing soil round the nearest two freezing pipes，characteristic of freezing wall developing，average temperature of freezin-ing wali，and formularizing relation between thickness of inside freezing wall and thickness of outside freezing wall of freezing circle，are used in the freezing design，Calculating results are compared with observed data，and it is shown that the accuacy of results obtained with calcu-lating metheod and formulaes in this paper are high.

关 键 词：竖井井筒 冻结法 凿井 热工计算 

分 类 号：TD265.34[矿业工程—矿井建设]