大型地下洞室群施工期围岩力学参数多维动态反演及应用  

Multidimensional Dynamic Inversion and Application of Surrounding Rock Mechanical Parameters during Construction of Large Underground Caverns

作　　者：黄鹏 狄圣杰 刘静[1,2] 张莹 HUANG Peng;DI Shengjie;LIU Jing;ZHANG Ying(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China;State Key Laboratory of Ecological Water Resources in Northwest Arid Region,Xi'an 710065,China;High Slope and Geological Disaster Research and Management Sub-Center,National Energy and Hydropower Engineering Technology Research and Development Center,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065 [2]西北旱区生态水利国家重点实验室西北院分室,西安710065 [3]国家能源水电工程技术研发中心高边坡与地质灾害研究治理分中心,西安710065

出　　处：《西北水电》2022年第5期138-144,共7页Northwest Hydropower

摘　　要：岩体力学参数是影响地下洞室围岩稳定性的重要因素,随着地下洞室开挖对围岩的扰动,岩体的力学参数将发生一定程度的劣化。根据水利水电工程地下厂房三大洞室群施工分期开挖支护进度情况、岩体卸荷松弛程度及地质编录信息,进行均匀设计和优化算法融合,提出了一种地下洞室开挖过程中围岩力学参数多维动态反演方法,并以某水电站工程为例,对其地下厂房洞室群施工期围岩力学参数进行分阶段、分部位、分期次、分区域进行多维实时反演,结果表明:反演参数的计算位移值与监测实测值吻合,验证了其合理性,可为地下洞室支护方案优化提供依据。Mechanical parameter of rock mass is an important factor affecting the stability of surrounding rock of underground caverns.With the disturbance of surrounding rock by underground cavern excavation,the mechanical parameters of rock mass will deteriorate to a certain extent.Based on the progress of excavation and support,the degree of unloading relaxation of rock mass and the geological catalog information of the three caverns for underground powerhouse of water conservancy and hydropower projects,using the fusion technology of uniform design and optimization algorithm,a multidimensional dynamic inversion method for the surrounding rock mechanical parameters during the underground cavern excavation is proposed.Taking a hydropower station as an example,multidimensional real-time inversion is carried out in different phases,locations,periods and areas for the surrounding rock mechanical parameters of the underground powerhouse caverns during the construction period.The results show that the calculated displacement values of the inversion parameters are consistent with the monitoring and measured values,which verifies its rationality,and provides a basis for optimizing the support plan.

关 键 词：地下洞室 施工期 力学参数 多维动态反演 优化设计 

分 类 号：U453.2[建筑科学—桥梁与隧道工程]