地下厂房岩壁吊车梁施工与运行期全过程数值仿真分析  

NUMERICAL EMULATION ANALYSIS OF ROCK BOLT CRANE IN UNDERGROUND POWERHOUSE BEAM DURING CONSTRUCTION AND RUNNING PERIODS

作　　者：曾静[1] 盛谦[1] 杨昌定[2] 

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071 [2]安徽省水利水电勘测设计院,安徽合肥230022

出　　处：《岩石力学与工程学报》2006年第z1期3051-3056,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2002CB412708);中国科学院武汉岩土力学研究所前沿领域基金项目(Q220304)

摘　　要：以佛子岭抽水蓄能电站地下主厂房为背景,采用数值仿真分析软件Phase2对地下厂房岩壁吊车梁建造与运行期全过程进行数值仿真分析,探讨轮压荷载施加时机、地应力场、围岩力学特性对地下厂房与岩壁吊车梁受力特征的影响。分析结果表明:(1)吊车梁结构合理,支护参数可行,只要围岩自身的稳定性得到保证,则岩壁吊车梁是稳定的;(2)厂房开挖过程中,施加轮压荷载可以使岩壁吊车梁提前进入运行期,加快施工进度;(3)构造应力对吊车梁内锚杆应力影响显著,使锚杆应力大大增加,但是考虑构造应力可以适当减小吊车梁内最大拉应力量值;(4)吊车梁变形及其锚杆应力主要受围岩性质的影响。Numerical emulation analysis of rock bolt crane beam in the underground powerhouse in Foziling Power Station during the construction and running periods is carried out by using elasto plastic finite element program Phase2.The influences of some factors on the underground powerhouse and the rock bolt crane beam are discussed,such as the time when the wheel loading is applied the in-situ stress field,and the mechanical characteristics of surrounding rock,Analytical results show that:(1) the crane beam has rational structure and feasible supporting parameters.The rock bolt crane beam will be stable so long as the surrounding rock is steady by itself;(2) the rock bolt crane beam can be in running period in advance and the construction schedule can be quicken when the wheel loading is applied during the construction of the powerhouse;(3) the tectonic stresses has prominent influences on bolt stresses of the crane beam,which can be greatly increased,while the maximum tension stresses in crane beam can be decreased relevantly considering the tectonic stresses;and(4) the deformation of the crane beam and the stresses of the bolt are mainly controlled by the mechanical parameters of surrounding rock.

关 键 词：岩石力学 吊车梁 侧压力系数 材料参数 锚杆应力 变形 

分 类 号：TU45[建筑科学—岩土工程]