黄土地区铁路隧道围岩支护参数多目标优化探讨  

Exploration of Multi-objective Optimization of Surrounding Rock Support Parameters for Railway Tunnels in Loess Areas

作　　者：梁宇[1] LIANG Yu(The Second Engineering Co.,Ltd.,China Railway 18th Bureau Group,Tangshan 064000,Hebei,China)

机构地区：[1]中铁十八局集团第二工程有限公司,河北唐山064000

出　　处：《路基工程》2025年第1期184-189,共6页Subgrade Engineering

摘　　要：提出基于变异算子优化粒子群的黄土地区铁路工程隧道围岩支护参数多目标优化,以围岩压力作为外部荷载,将受力施加于梁单元,建立荷载结构模型,根据计算模型与优化约束条件,构建支护优化参数模型,调整搜索最优参数,基于变异算子优化粒子群,将粒子分为基础群与综合群;引入变异算子,对惯性权重参数进行调整,对围岩支护压力、二次衬砌厚度、喷层厚度等参数进行迭代计算,得到优化后的围岩支护参数。优化后围岩喷层厚度最高由26 cm减少到12 cm,支护压力最高由65 kPa增加到253 kPa,二次衬砌厚度最高由58 cm减小到30 cm,优化效果较好。A multi-objective optimization of surrounding rock support parameters for railway engineering tunnels in loess areas based on mutation operator optimized particle swarm optimization is proposed.Using the surrounding rock pressure as the external load,the force is applied to the beam element,and a load structure calculation model is established.Based on the calculation model and optimization constraints,a support optimization parameter optimization model is constructed.Adjust the search of optimal parameters,based on mutation operators optimized particle swarm optimization,the particles are divided into basic groups and comprehensive groups.Mutation operators are introduced to adjust the inertia weight parameters and iterative calculations are carried out on the surrounding rock support pressure,secondary lining thickness,spray layer thickness,etc.to obtain optimized rock support parameter.The maximum thickness of the surrounding rock spray layer is reduced from 26 cm to 12 cm,the maximum support pressure is increased from 65 kPa to 253 kPa,and the maximum thickness of the secondary lining is reduced from 58 cm to 30 cm,with a good optimization effect.

关 键 词：黄土隧道 变异算子 支护参数 结构计算 多目标优化 

分 类 号：U455[建筑科学—桥梁与隧道工程]