论文部分内容阅读
作者曾把喷锚支护的作用原理概括为:在岩洞发生破坏直前,限制围岩的变形与位移,以改善洞体应力状态,提高岩体强度,达到充分发挥围岩的自稳能力。并称支护的这种作用原理为加固概念。后来,被人们称为围岩加固论。围岩加固论,考虑了围岩变形的时间因素,着限于应力场的调整与岩体力学特性的变化。它的实质在于:充分发挥围岩的自稳能力,防围岩破坏于末然。在实际应用时,如何判断岩洞发生破坏直前?如何判断围岩的稳定状态?一般地说,可以通过现场的围岩变形观测来解决。国内
The author once summed up the principle of action of shotcrete-anchor support as follows: Before the rock cave is destroyed, the deformation and displacement of the surrounding rock will be limited to improve the stress state of the cavern and increase the strength of the rock mass, so as to fully exert the self-stability of the surrounding rock. This principle of action, which is called support, is the reinforcement concept. Later, it was called the reinforcement theory of surrounding rock. The reinforcement theory of surrounding rock considers the time factor of deformation of surrounding rock and is limited to the adjustment of stress field and the change of mechanical properties of rock mass. Its essence lies in: Give full play to the self-stability of the surrounding rock and prevent the surrounding rock from destroying it at the end. In practical application, how to judge the immediate damage of the rock cavern and how to judge the stability of the surrounding rock? Generally speaking, it can be solved by the deformation observation of the surrounding rock. domestic