黄河小浪底水利枢纽工程地下厂房洞室群块体介质力学模型实验──预应力锚索支护效果

Mechanical Tests of Block Media in the Underground Plant Chambers of the Xiaolangdi Multi-Purpose Dam Project──Effect of Prestressed Anchorage Cable Supports

本文采用块体介质力学模型试验方法，研究了地下洞室群围岩的受力特点，破坏形态和破坏机理；洞室围岩超载能力和开挖步序对围岩稳定性的影响；砂浆锚杆和预应力锚索的不同加固效果；验证喷锚支护设计方案的合理性。

Using the loding method of block medium mechanical model,the stressoing characteristics of the adjoining rock of the underground tunnel and building group are analyzed inthiS paper. The failure type and mechanism,the influences of excess load and excavation step onthe stability of the adjoining rock,and the reinforcement effects of mortar anchor andprestressing anchorage cable are studied.The rationality of the design scheme of shotcreting boltsupport is then verified.