Neuner Matthias, Schreter Magdalena, Unteregger David, Hofstetter Günter
Unit for Strength of Materials and Structural Analysis, Institute of Basic Sciences in Engineering Science, Innsbruck University, Technikerstr. 13, Innsbruck A-6020, Austria.
Materials (Basel). 2017 May 25;10(6):577. doi: 10.3390/ma10060577.
The aim of the present paper is to investigate the influence of the constitutive model for shotcrete on the predicted displacements and stresses in shotcrete shells of deep tunnels. Previously proposed shotcrete models as well as a new extended damage plasticity model for shotcrete are evaluated in the context of 2D finite element simulations of the excavation of a stretch of a deep tunnel by means of the New Austrian Tunneling Method. Thereby, the behavior of the surrounding rock mass is described by the commonly used Hoek-Brown model. Differences in predicted evolutions of displacements and stresses in the shotcrete shell, resulting from the different shotcrete models, are discussed and simulation results are compared to available in situ measurement data.
本文的目的是研究喷射混凝土本构模型对深埋隧道喷射混凝土衬砌中预测位移和应力的影响。在采用新奥地利隧道施工法对一段深埋隧道开挖进行二维有限元模拟的背景下，对先前提出的喷射混凝土模型以及一种新的喷射混凝土扩展损伤塑性模型进行了评估。其中，围岩的行为采用常用的Hoek-Brown模型进行描述。讨论了由不同喷射混凝土模型导致的喷射混凝土衬砌中位移和应力预测演变的差异，并将模拟结果与现有的现场测量数据进行了比较。
