岩土力学2011，Vol.32Issue(5)：1568-1574,7.
大型地下洞室群开挖支护弹塑性损伤优化研究
Study of support optimization of large underground cavern group excavation using elastoplastic damage finite elements
摘要
Abstract
The geological conditions of large underground cavem group are complicated, of which the support project affects stability of surrounding rock So it is important to study the support optimization of large underground cavem group excavation.In order to simulate rock mass veritably and analyze its damage in construction the elastoplastic damage model and damage evolution equation are presented on the basis of the irreversible thermodynamics theory.The 3D elastoplastic damage finite element code D-FEM is programmed by using Fortan language.which has the capabilities of simulating excavation and support.computing quickly and group function.3D numerical model of underground cavern group is established, input initial geostress is inversion of field stress measurement.The cavern group excavation by different support projects is simulated by D-FEM.The stress, displacement and damage of surrounding rock under three different cases are analyzed.The effect of No.2 support project is best and so is proposed Considering damage evolvement, damage zones compared to plastic zones of FLAC3D, damage zones in side wall of cavem group increase remarkably.So the elastoplastic damage finite elements can analyze stability of underground cavem engineering.关键词
弹塑性损伤模型/三维有限元/地下洞室群/支护优化/稳定性分类
交通工程引用本文复制引用
岳晓蕾,王汉鹏,郑学芬,史向荣..大型地下洞室群开挖支护弹塑性损伤优化研究[J].岩土力学,2011,32(5):1568-1574,7.基金项目
国家自然科学基金青年基金项目(No.50904043). （No.50904043）
