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新奥法,对于良好的围岩已制定出标准支护类型并已广泛利用,但对低强度围岩还是一个遗留的课题,不得已试行错误的设计施工。本文以确立低强围岩中新奥法设计方法为目的,建议从围岩特性曲线得到的最小开挖范围为设计的目标及方法,并研究了对实际施工的适用性。为提高该设计方法的通用性利用有限元法是必不可少的,并同时研究了这一课题。
The new Austrian law, for the good surrounding rock has developed a standard type of support and has been widely used, but low-intensity surrounding rock is still a legacy of the project, the trial and error had to try out the design and construction. The purpose of this paper is to establish a new Austrian method for the design of low-strength surrounding rock. It is suggested that the minimum excavation range obtained from the characteristic curve of surrounding rock is the design goal and method, and the applicability to actual construction is also studied. In order to improve the versatility of the design method, it is necessary to use the finite element method, and at the same time to study this subject.