基于功能原理的围岩耗散能计算
首发时间:2013-12-03
摘要:地下工程的建设打破了原有岩体的平衡,因而围岩的稳定性及硐室的安全性成为工程们所重点关注的课题之一。目前的研究中将围岩假定为弹性或者塑性状态,然后进行其应力、应变及其它力学量的计算,进而判断硐室是否安全。本文从开挖过程中围岩的具体变形状态出发,基于功能转化与守恒定律,推导了硐室开挖过程中径向应力与环向应力的表达式,进而得出围岩耗散能的计算公式。以期本文对工程实际有一定的参考价值。
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The Calculation of the rock's dissipation energy base on the functional principle
Abstract:Construction of underground projects break the balance of original rock mass, surrounding rock stability and security is one of the topics that engineers focus on. The former research about stress and energy calculation based on the assumption that surrounding rock is in elastic or plastic state. Calculate the stress, strain and other mechanical quantities, then decide the chanber security. This paper consider the specific rock deformation state during excavation, obtaining the radial and hoop stress expression in view of functional principle and conservation of mass. And then getting the formula of the rock's dissipation energy. Hoping this paper can provide some meaningful guides for engineering practice.
Keywords: functional principle conservation of mass stress expression dissipated energy
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