喷锚支护与隧道自承拱的机理

Mechanism of grouted rockbolting and self-supporting arch of tunnels

为了使岩石隧洞拱部稳定,喷锚支护被广泛用于地下隧洞的支撑设计中。正确的喷锚支护设计应该基于对喷锚支护加固的特性和洞顶岩石拱结构的机理两方面都有一个清楚的认识。为此,以三峡工程地下厂房拱顶设计为例,研究洞顶岩石拱结构形成及加固机理。

To stabilize roof arches of rock tunnel,grouted rockbolts were wid ely used in the designs of supports of the underground tunnels. A proper design o f rockbolts should be based on a clear understanding of both the features of roc kbolt reinforcement and the mechanism of the rock roof arch structure. For this purpose the mechanism of forming a rock tunnel roof arch and reinforcement will be illustrated with the underground powerhouse in The Three Gorges Project.