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对于隧道支护设计来说,如何确定圈岩对支护的作用力十分重要。由于岩体特性十分复杂,使得数值方法遇到了较大的困难。考虑到位移量测方法较为简便、花费省,且结果较可靠,所以我们提出以支护本身为对象的山岩压力位移反分析方法。 基于一大型模型试验的结果,我们提出了山岩压力位移反分析法的原理和在此基础上编制了PRESS程序。算例表明程序完全可行。 为在工程中应用,本文还建议一些高精度的位移量测仪器。
For tunnel support design, how to determine the impact of the rock on the support is very important. Due to the complex nature of the rock mass, the numerical method encountered greater difficulties. Taking into account the displacement measurement method is relatively simple, cost-saving, and the result is more reliable, so we proposed the back-analysis method of rock pressure displacement with support itself as object. Based on the results of a large-scale model test, we have proposed the principle of rock slope pressure displacement back analysis and compiled the PRESS program on this basis. Examples show that the program is completely feasible. For application in engineering, this article also recommends some high-precision displacement measuring instruments.