1. 福建工程学院土木工程学院∥福建省土木工程新技术与信息化重点实验室,福建,福州,350118
2. 安徽理工大学矿山地下工程教育部工程研究中心,安徽,淮南,232001
3. 中国科学院寒区旱区与环境工程研究所∥冻土工程国家重点实验室,甘肃,兰州,730000
纸质出版日期:2016,
网络出版日期:2016-7-25,
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陈军浩, 夏红兵, 李栋伟. 多圈管冻结壁温度场发展及冻结管偏斜影响[J]. 中山大学学报(自然科学版)(中英文), 2016,55(4):56-62.
CHEN Junhao, XIA Hongbing, LI Dongwei. Multi-circle-tube frozen wall temperature field development and deviation pipes influence[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(4):56-62.
人工多圈管冻结是深厚地层井筒掘砌的最有效方法,为进一步了解冻结壁温度场发展特性,以某冻结井筒为原型,开展了室内多圈管冻结模型试验,同时借助有限元软件对冻结管无偏斜以及随机偏斜两种条件下冻结壁温度场发展特性进行了分析比较。得出冻结管布置圈径对冻结壁环向扩展速率影响较小;冻结管偏斜对井帮温度、冻结壁有效厚度影响较小,但对不同位置冻结壁交圈时间及对径向方向冻结壁平均温度影响较大;同时冻结管偏斜会使冻结壁内部产生更多的密闭未冻承压水仓,引起冻结壁内部冻胀力增大,对冻结壁整体稳定性产生不良影响。在冻结造孔时,要严格控制冻结管偏斜。
It is well known that artificial multi-circle-tube freezing method could provide better experiences on shaft excavation in deep stratum. For further researching on evolution of the thermal field
the analogy model simulation was carried on
and the temperature field characteristics in frozen wall without freezing tube deviation were analyzed as well as it in random deviation of freezing tube. Comparing the results
it was concluded that the radius of the circular distribution of freezing tube poses slight effects on the annular expanding velocity of the frozen wall
and freezing tube deviation has minor influences on the temperature distribution of the shaft wall and the effective thickness of the frozen wall as well. It has important impacts on the time of frozen wall circle-crossing in different positions and the average temperature distribution in radial direction. In addition
it could result more enclosed confined water storage within the inner of the frozen wall
thereby increasing the heave force inside the frozen wall with negative effects on the stability of the frozen wall. As a result
the freezing tube deviation should be controlled strictly as drilling freezing holes.
多圈管冻结壁温度场模型试验冻结管偏斜
multi-circle-tubefrozen walltemperature fieldmodel testdeviation pipes
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