冻结井壁混凝土温度场本构模型研究及应用
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摘要
冻结井壁温度场分布情况复杂,并且受到井筒内空气、冻结壁等周围环境等因素的影响。考虑井筒内空气、冻结壁以及井壁厚度等影响因素,通过改进混凝土绝热模型,引进λ,m和n等参数,建立了混凝土井壁温度场本构模型。以营盘壕井壁温度实测数据为例,进行混凝土井壁温度场模型参数反演,并将得到的预测值与实测值进行对比分析,得出冻结井壁温度场分布以及随龄期的变化规律。研究成果对冻结井壁设计与施工有参考价值。
A distribution condition of the temperature field in a mine freezing shaft liner was complicated and was affected by the air in the mine shaft,freezing wall and surrounding environment as well as other factors.In consideration of the air in the mine shaft,freezing wall,thickness of the shaft liner and other influence factors,with the improved concrete insulation model,introduction ofλ,m,nand other parameters,the constitutive model of the temperature field in the mine concrete shaft liner was established.Based on the measured temperature data of Yingpanhao mine shaft liner as the case,aparameter inversion was conducted on the temperature field model of the concrete shaft liner.A comparison was conducted on the obtained predictive value and the measured value.The temperature field distribution of the freezing shaft liner and the variation law with the curing time were obtained.The research results would have the reference value to the design and construction of the mine freezing shaft liner.
A distribution condition of the temperature field in a mine freezing shaft liner was complicated and was affected by the air in the mine shaft,freezing wall and surrounding environment as well as other factors.In consideration of the air in the mine shaft,freezing wall,thickness of the shaft liner and other influence factors,with the improved concrete insulation model,introduction ofλ,m,nand other parameters,the constitutive model of the temperature field in the mine concrete shaft liner was established.Based on the measured temperature data of Yingpanhao mine shaft liner as the case,aparameter inversion was conducted on the temperature field model of the concrete shaft liner.A comparison was conducted on the obtained predictive value and the measured value.The temperature field distribution of the freezing shaft liner and the variation law with the curing time were obtained.The research results would have the reference value to the design and construction of the mine freezing shaft liner.
引文
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[6]龚有常,郭垒,陈红蕾,等.富水厚软弱砾石层冻结壁与井壁温度场实测研究[J].建井技术,2016,37(5):34-37.
[7]Meinhard K,Lackner R.Multi-phase hydration model for prediction of hydration-heat release of blended cements[J].Cement&Concrete Research,2008,38(6):794-802.
[8]胡向东,邓声君,汪洋,等.人工地层冻结稳态温度场解析解研究进展[J].建井技术,2015,36(5):1-9.
[9]张红亚.冻结深立井钢筋混凝土井壁温度场与温度应力研究[D].合肥:合肥工业大学,2013.
[2]Hillerborg A,Modéer M,Petersson P E.Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements[J].Cement&Concrete Research,1976,6(6):773-781.
[3]朱伯芳.大体积混凝土温度应力与温度控制[M].北京:中国电力出版社,1999:144-145.
[4]潘家铮.水工建筑物的温度控制[M].北京:水利电力出版社,1990:202-203.
[5]朱伯芳.考虑温度影响的混凝土绝热温升表达式[J].水力发电学报,2003(2):69-73.
[6]龚有常,郭垒,陈红蕾,等.富水厚软弱砾石层冻结壁与井壁温度场实测研究[J].建井技术,2016,37(5):34-37.
[7]Meinhard K,Lackner R.Multi-phase hydration model for prediction of hydration-heat release of blended cements[J].Cement&Concrete Research,2008,38(6):794-802.
[8]胡向东,邓声君,汪洋,等.人工地层冻结稳态温度场解析解研究进展[J].建井技术,2015,36(5):1-9.
[9]张红亚.冻结深立井钢筋混凝土井壁温度场与温度应力研究[D].合肥:合肥工业大学,2013.