摘要
采取弹塑性有限元程序,在考虑施工爆破、岩体节理影响的条件下,对常张高速公路重点边坡的施工过程进行了模拟,分析了开挖过程中,岩体的变形和应力状态及屈服状态,并用降低材料强度储备的有限元强度折减法,根据边坡岩体单元的屈服连通程度和关键部位的位移变化对高边坡的整体安全系数进行了研究。通过对重点边坡K123的分析表明,边坡在其施工过程中是稳定的。
The simulation of stage excavation for the high slope of ChangZhang highway is carried out by using two-dimensional elastoplastic finite element method with consideration of the influence of blasting and rock joint. The rock mass deformation, stresses and yielding state in the excavation process are analyzed respectively . The integral safety of the high slope is discussed by using the method of lowering the material~ strength safety factor and in light of the yielding rate of the slope＇s rock mass element and variation of displacements of the key parts. After the research of important slope K123, a conclusion can be drawn that the slopes would be stable in construction process.
出处
《地下空间与工程学报》
CSCD
2007年第2期350-355,共6页
Chinese Journal of Underground Space and Engineering
关键词
岩质边坡
施工过程模拟
弹塑性有限元
稳定性分析
安全系数
rock slope
simulation of stage excavation
elasto - plastic finite element
stability analysis
safety factor
