岩土力学2012，Vol.33Issue(6)：1761-1768,8.
隧道水平冻结施工引起地表冻胀的历时预测模型
A duration prediction model of surface frost heave induced by tunnelling with horizontal freezing method
摘要
Abstract
In the process of tunnelling with horizontal freezing method, soil volume expansion caused by freezing can produce the phenomenon of surface frost heave. Multiple frozen pipes are usually used to form frozen wall in the actual engineering. Before the circle-crossing period of frozen wall, surface frost heave is induced by superimposed expansion deformation of multiple frozen columns. After the circle-crossing period of frozen wall, surface frost heave is induced by expansion deformation of the whole frozen wall. In view of this, considering the formation process of frozen wall and based on stochastic medium theory, a duration prediction model of surface frost heave induced by tunnelling with horizontal freezing method is presented. Two value methods of freezing outer front radius and frost heave region outer radius are discussed at the same time. Finally, aiming at two engineering cases, surface frost heave displacements are analyzed by calculation model. Variations of surface frost heave displacements with time are obtained, which are compared with field measured results to verify reliability of the model. The model is applied to surface frost heave displacements prediction at any time of freezing period before tunnelling with horizontal freezing method, and can provide effective reference for reasonable determining freezing implementation scheme.关键词
隧道冻结/地表冻胀/冻结过程/预测模型/随机介质理论Key words
tunnel freezing/ surface frost heave/ freezing process/ prediction model/ stochastic medium theory分类
交通工程引用本文复制引用
蔡海兵,彭立敏,郑腾龙..隧道水平冻结施工引起地表冻胀的历时预测模型[J].岩土力学,2012,33(6):1761-1768,8.基金项目
国家重点基础研究发展973计划(No.2011CB013802) （No.2011CB013802）
住房和城乡建设部科学技术项目(No.2010-K3-16) （No.2010-K3-16）
安徽省自然科学基金项目(No.1208085QE87). （No.1208085QE87）
