人民长江2024，Vol.55Issue(6)：194-203,10.DOI:10.16232/j.cnki.1001-4179.2024.06.027
旭龙电站尾水调压室洞间岩柱围岩宏细观特性分析
Macro and micro characteristics of surrounding rock of rock pillar between tail-race surge chamber caverns in Xulong Power Station
摘要
Abstract
To couple continuous and discontinuous analysis methods for the stability analysis of surrounding rock in underground power stations,a rapid calibration method for mesoscopic parameters based on a soft-hard mixed parallel bond model was imple-mented.This method can quickly correspond to the given rock macroscopic mechanical parameters to PFC model mesoscopic con-tact parameters.A three-dimensional discrete continuous coupling analysis model for the tail-race surge chamber of Xulong Power Station based on the coupling of particle discrete element PFC 3D and finite difference FLAC 3D was constructed.The mac-ro-micro deformation and failure characteristics of rock pillars between tail-race surge chamber caverns during excavation were studied,as well as the impact of lateral water pressure on the rock pillar stability.The results showed that the deformation and stress increment of surrounding rock caused by the water pressure in the surge chamber under maintenance condition were mini-mal,but there was a plastic penetration zone at the height of 22.7 m in the upper half of the rock pillar between the caverns,with poor local stability.Thus it is necessary to carry out a special support scheme study on the plastic penetration zone of the tail-race surge chamber and tail-race branch tunnel rock piers during the construction period to ensure the safe construction and op-eration of the Xulong Power Station project.关键词
尾水调压室/洞间岩柱/FLAC 3D/离散-连续耦合/塑形贯通区Key words
tail-race surge chamber/rock pillar between caverns/FLAC 3D/discrete-continuous coupling model/plastic penetration zone分类
建筑与水利引用本文复制引用
李冬冬,陈捷平,吴秋波,孙海清..旭龙电站尾水调压室洞间岩柱围岩宏细观特性分析[J].人民长江,2024,55(6):194-203,10.基金项目
国家自然科学基金项目(52079097) （52079097）
