单排管冻土帷幕平均温度控制参数敏感性分析  

Sensitivity Analysis of Control Parameters for Average Temperature of Single-Row-Pipe Frozen Soil Wall

作　　者：杨波[1,2] 丁文其[1,2] 胡向东[1,2] 刘鹏[1,2] 

机构地区：[1]同济大学土木工程学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《地下空间与工程学报》2012年第6期1208-1214,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(No.50578120)

摘　　要：在冻土帷幕平均温度计算中,控制参数的变化直接影响到计算结果。以单排管冻土帷幕温度场的巴霍尔金解析解为基础,使用近似积分和有限元模拟方法计算直线形单排管冻土帷幕的整体平均温度。针对基于巴霍尔金模型的平均温度计算公式中的冻结管外表面温度、冻结管间距及冻土帷幕边界到冻结管中心的距离与冻结管间距的比值3个参数对冻土帷幕整体平均温度影响的敏感性进行分析。得到以下结论:(1)冻土帷幕整体平均温度与冻结管外表面温度成正比;(2)在相同的偏差下,冻结管间距越小,对整体平均温度影响越大;(3)随着冻结发展,冻土帷幕厚度逐渐增大,其误差对整体平均温度计算的影响逐渐降低。Control parameters directly affect the results of average temperature calculation of single-row-pipe frozen soil wall.On the base of Bakoldin＇s analytical solution for temperature field in single-row-pipe frozen soil wall,approximate integral and FEM numerical simulation method were used to calculate average temperature of the wall.The sensitivity analysis was conducted about three parameters,including outer surface temperature of frozen pipes,spacing of frozen pipes and the ratio of half the width of frozen soil wall to spacing of frozen pipes.The conclusions can be drawn as follows：（1）the average temperature of frozen soil wall is proportional to outer surface temperature of frozen pipes,（2）at the same deviation,the smaller the spacing of frozen pipes,the greater the impact on the average temperature.（3）with the development of freezing,the width of frozen soil wall increases,the impact of errors on the average temperature decreases.

关 键 词：单排管冻结 冻土帷幕 平均温度 巴霍尔金解 敏感性 

分 类 号：TU475[建筑科学—结构工程]