摘要
以新疆某典型水电工程引水隧洞为研究对象,在详细分析其工程地质条件的基础上,建立三维数值模型,对施工和运营条件下隧洞围岩的稳定性进行计算,并与实际监测结果进行了对比。结果表明,初期支护后,支护结构承受部分围岩压力,围岩应力得到改善,隧洞围岩变形明显减小,隧洞全断面二次支护对围岩的变形和应力能起到一定的改善作用。而正常运行时,围岩的竖向位移随时间有少量的增长。计算结果与监测数据相比具有相同的变化规律,表明了三维数值计算的合理性。
Based on the detailed analysis of the engineering geological conditions of the diversion tunnel of a typical hydropower project in Xinjiang,a three-dimensional numerical model is established to calculate the stability of the surrounding rock under construction and operation conditions,and the results are compared with the actual monitoring results.The results show that after the initial support,the support structure can bear part of the surrounding rock pressure,the surrounding rock stress is improved,and the deformation of the surrounding rock is obviously reduced.The secondary support of the tunnel can play a certain role in improving the deformation and stress of the surrounding rock.During normal operation,the vertical displacement of surrounding rock increases slightly with time.Compared with the monitoring data,the calculated results have the same variation rule,which shows that the three-dimensional numerical calculation is reasonable.
作者
李俊美
LI Jun-mei(Guangdong Chenghua Engineering Consulting Co.Ltd.,Guangzhou 510000,China)
出处
《工程建设与设计》
2023年第14期55-57,共3页
Construction & Design for Engineering
关键词
水电站
引水隧洞
施工期
运行期
稳定性
模拟分析
hydropower station
diversion tunnel
construction period
operation period
stability
simulation analysis
作者简介
李俊美(1978-),男,湖北石首人,工程师,讲师,从事水利工程设计与研究。
