水下岩巷围岩蠕变Norton-Hoff解法与分析
发布时间：2018-07-16 13:54
【摘要】：富水环境中岩体巷道的长期稳定性与水的渗流、岩体流变等因素紧密相关。文章假设围岩蠕变行为服从Norton-Hoff定律,建立水下岩巷扰动区蠕变的计算模型,并利用Laplace变换以及有效应力原理解答水下岩巷受力与变形的时效问题;在Norton-Hoff解法基础上获得了与时间相关的水下岩巷变形计算式,并对扰动区的蠕变变形进行参数敏感性分析。研究表明:随着岩石黏滞系数的增大,岩巷蠕变变形逐渐减小,呈现非线性特性;水力传导系数仅对深处围岩的时效变形产生影响,增大该系数,岩巷围岩深处任一点位的位移分布增大。该研究可为更复杂的水下岩巷蠕变变形的数值计算提供理论参考。
[Abstract]:The long-term stability of the rock roadway in the rich water environment is closely related to the factors such as water seepage and rock mass rheology. The paper assumes that the creep behavior of the surrounding rock obeys the Norton-Hoff law, establishes the calculation model of the creep in the disturbed area of the underwater rock roadway, and uses the Laplace transformation and the effective stress to understand the time limitation of the stress and deformation of the rock roadway under the water; in Nor On the basis of the ton-Hoff solution, the calculation formula for the time dependent deformation of the underwater rock roadway is obtained, and the parameter sensitivity analysis of the creep deformation is carried out. The study shows that the creep deformation of the rock roadway decreases gradually with the increase of the viscosity coefficient of rock, and the hydraulic conductivity coefficient only affects the aging deformation of the deep surrounding rock. By increasing this coefficient, the displacement distribution of any point in the rock depth of rock roadway increases. This study can provide a theoretical reference for the more complex numerical calculation of creep deformation of underwater rock roadway.
【作者单位】： 西北综合勘察设计研究院;成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金资助项目(41172279)
【分类号】：TU45
本文编号：2126600
[Abstract]:The long-term stability of the rock roadway in the rich water environment is closely related to the factors such as water seepage and rock mass rheology. The paper assumes that the creep behavior of the surrounding rock obeys the Norton-Hoff law, establishes the calculation model of the creep in the disturbed area of the underwater rock roadway, and uses the Laplace transformation and the effective stress to understand the time limitation of the stress and deformation of the rock roadway under the water; in Nor On the basis of the ton-Hoff solution, the calculation formula for the time dependent deformation of the underwater rock roadway is obtained, and the parameter sensitivity analysis of the creep deformation is carried out. The study shows that the creep deformation of the rock roadway decreases gradually with the increase of the viscosity coefficient of rock, and the hydraulic conductivity coefficient only affects the aging deformation of the deep surrounding rock. By increasing this coefficient, the displacement distribution of any point in the rock depth of rock roadway increases. This study can provide a theoretical reference for the more complex numerical calculation of creep deformation of underwater rock roadway.
【作者单位】： 西北综合勘察设计研究院;成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金资助项目(41172279)
【分类号】：TU45
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