人民长江2025，Vol.56Issue(4)：143-148,6.DOI:10.16232/j.cnki.1001-4179.2025.04.019
大型地下厂房顶拱-锚固洞安全距离研究
Research on safe distance between prestressed crown anchor caverns and top arch of large underground powerhouses
摘要
Abstract
Determining the safe distance between prestressed crown anchor caverns and the powerhouse top arch is a prerequi-site for constructing large underground powerhouses in gently inclined stratified rock masses using the"crown anchor caverns+penetrating prestressed anchor cables"excavation and support scheme.The design must ensure minimal disturbance to the sur-rounding rock of the powerhouse crown while maintaining economic efficiency and construction feasibility.To address this,we first employed an engineering analogy approach to analyze the safe distances of crown anchor caverns in numerous existing large under-ground powerhouses and their controlling factors.Subsequently,based on the theory of stable arch,the concept of plastic zones in surrounding rock,and excavation disturbance zones,a systematic method centers on the stable arch range of the powerhouse crown,with the plastic zone and excavation disturbance zone of the surrounding rock as validation criteria,was proposed to deter-mine the safe distance.Finally,the Changyang Pumped Storage Power Station underground powerhouse was modeled and analyzed as a case study.The results indicate that the safe distance of the crown anchor caverns in this project should exceed 30 meters.The findings provide valuable guidance for optimizing excavation and support schemes in underground powerhouses with similar geological conditions.关键词
地下厂房/缓倾层状地层/锚固洞/安全距离/稳定拱/围岩扰动因子Key words
underground powerhouse/gently inclined stratified rock mass/anchor cavern/safe distance/stable arch theory/surrounding rock disturbance factor分类
建筑与水利引用本文复制引用
郭冬云,刘鹏程,韩钢,黄书岭,张雨霆..大型地下厂房顶拱-锚固洞安全距离研究[J].人民长江,2025,56(4):143-148,6.基金项目
国家自然科学基金项目(U2340229) （U2340229）
长江科学院创新团队项目(CKSF2021715/YT,CKSF2023305/YT) （CKSF2021715/YT,CKSF2023305/YT）
