鲁地拉水电站地下厂房岩壁吊车梁设计

鲁地拉水电站工程地下厂房吊车梁采用岩壁吊车梁结构。设计时采用《地下厂房岩壁吊车梁设计规范(Q/CHECC 003-2008)》推荐方法对梁体受拉锚杆的截面积、锚固长度以及梁体的抗滑稳定等进行了详细的计算。此外还应用ANSYS程序,采用二维、三维非线性有限单元法,精细模拟了围岩、梁体、锚杆以及岩壁吊车梁与岩体的接触面,对岩壁吊车梁的受力特性进行了系统的计算分析。数值仿真分析结果表明采用接触面单元、锚杆单元,充分考虑了梁体与围岩之间的张开、接触、摩擦以及受拉锚杆与围岩的相互作用,较好地反映了岩壁吊车梁在各种工况下的工作性态及支护机理,对其他工程的岩壁吊车梁的稳定性分析、支护设计有较好的借鉴和指导作用。

Design of Rock Bolt Crane Girder in Underground Powerhouse,Ludila Hydropower Project

The rock bolt crane girder is applied in the underground powerhouse, Ludila Hydropower Project. When the girder is design, the section area and anchoring length of the anchor boh acted by the girder as well as stability of the girder against sliding are calculated in detail according to the methods recommended in Design Specifications for Rock Bolt Crane Girder in Underground Powerhouse, Q/ CHECC 003-2008. Additionally, ANSYS program and both 2D and 3D non-linear finite element methods are applied for detailed simula- tion of surrounding rock, girder, rock bolt and the contact surface between the girder and rock mass. The action features of the rock bolt crane girder are calculated and analyzed systematically. The analyzing result of value simulation shows that application of contact surface unit and rock bolt unit fully considers the factors of opening, contacting and friction between the girder and surrounding rock as well as in- teraction between the acted rock bolt and surrounding rock. They well present the operating conditions and support mechanism of the rock bolt crane girder under various conditions, providing stability analysis and support design of the rock bolt crane girder of other projects with reference and guidance.