TBM组装洞室锚杆长度优化研究

Research on TBM assembly cavern anchor length optimization

本文以大伙房输水工程TBM组装洞室为工程背景,利用有限元分析法对开挖支护中锚杆长度对围岩稳定性的影响展开研究。研究中主要选取围岩的位移、应力、塑性区和能量释放总量作为锚杆长度优化的指标,通过多指标综合评价,最终确定了该洞室锚杆的合理长度。

In the paper,Dahuofang Water Conveyance Project TBM assembly cavern is adopted as the engineering background.Finite element analysis method is utilized for studying the influence of anchor length in excavation support on the stability of surrounding rock.In the study,surrounding rock displacement,stress,plastic zone and total energy release are mainly selected as anchor length optimization indexes.Rational length of the anchor bolt of the carven is determined finally through the comprehensive evaluation of many indexes.