复杂支护结构软弱地层深竖井施工过程仿真分析  

Simulation Analysis of Construction Process of Deep Shaft in Soft Stratum with Complex Support Structure

作　　者：濮奇浩 骆晓锋 徐磊[2] 张磊[3] PU Qihao;LUO Xiaofeng;XU Lei;ZHANG Lei(Fujian Xiamen Pumped Storage Corporation Limited,Xiamen 361107,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Department of Structures and Materials,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]福建厦门抽水蓄能有限公司,福建厦门361107 [2]河海大学水利水电学院,江苏南京210098 [3]中国水利水电科学研究院结构材料研究所,北京100038

出　　处：《人民黄河》2022年第3期144-148,159,共6页Yellow River

基　　金：国家自然科学基金资助项目(U1765204,51739006,51979092)。

摘　　要：在软弱地层中修建深竖井工程存在围岩失稳坍塌与支护结构破坏等施工安全风险,而合理可靠的开挖支护施工方案是软弱地层深竖井工程施工期围岩稳定与支护结构安全的重要保障。针对某抽水蓄能电站软弱地层排风深竖井工程,建立考虑其复杂支护结构体系的施工全过程仿真分析模型,分析设计开挖支护方案下软弱地层围岩-支护结构体系的应力变形状态,并对施工期围岩稳定性与支护结构安全性进行了评价。在此基础上,通过对比不同开挖层厚、不同衬砌施作时机条件下的软弱地层围岩-支护结构体系施工力学性态,给出针对设计开挖支护方案的合理调整建议。Construction of deep shaft engineering in the softstratum faces risks such as unstable collapse of surrounding rock and destruction of supporting structure,and a reasonable and reliable excavation and support construction scheme is an important guarantee for the stability of surrounding rocks and the safety of the support structure during the construction of deep shafts in the soft stratum.Firstly,for a deep air outlet shaft project in the soft stratum of a pumped storage power station,a simulation analysis model of the entire construction process considering its complex supporting structure system was established in this paper;secondly,the stress and deformation of the surrounding rock⁃supporting structure system in the soft stratum under the design excavation and support scheme was analyzed,and the stability of the surrounding rock and the safety of the supporting structure during the construction period were evaluated.Based on this,by comparing the construction me⁃chanical behavior of the weak rock surrounding rock⁃supporting structure system under the conditions of different excavation layer thicknesses and different construction time of lining,the design excavation and support scheme was reasonably adjusted.

关 键 词：软弱地层竖井 施工仿真 支护体系 优化设计 

分 类 号：TV314[水利工程—水工结构工程]