以礼河四级电站复建工程地下厂房开挖围岩变形监测分析  

Monitoring and Analysis of Deformation of Surrounding Rock During Excavation of Underground Powerhouse in the Reconstruction Project of Yili River Fourth Level Hydropower Station

作　　者：巩海根 周武 张毅博 曾大洋 GONG Haigen;ZHOU Wu;ZHANG Yibo;ZENG Dayang(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Electrical and Mechanical Installation Branch,Kunming 650032,China;Power China Zhongnan Engineering Corporation Limited,Changsha 410014,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041 [2]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《云南水力发电》2025年第2期34-37,共4页Yunnan Water Power

摘　　要：以礼河四级电站复建工程地下厂房共分为6层进行开挖,开挖方法均为中导洞先掘进(中间拉槽)、两侧扩挖跟进。主厂房整体地应力较低,爆破开挖后浅层围岩应力释放较快,在开挖过程中由于系统支护与局部加强支护均比较及时,多点位移计安装及投入使用及时,监测数据采集分析上报及时,开挖支护专业与安全监测专业密切配合,最终将围岩位移变形控制在合理范围内。围岩位移变形持续增长的时间较短,通过对厂房开挖过程中的监测数据分析,得出了在低地应力、破碎岩体中开挖地下洞室时围岩变形的整体规律。The underground powerhouse of the Yili River fourth level power station reconstruction project is divided into six layers for excavation,and the excavation method is to excavate the middle guide tunnel first(middle groove) and expand the excavation on both sides.The overall ground stress of the main factory building is relatively low,and the stress release of the shallow surrounding rock is fast after blasting excavation.During the excavation process,due to timely system support and local reinforcement support,multi-point displacement meters were installed and put into use in a timely manner,monitoring data collection and analysis were reported in a timely manner,and the excavation support profession closely cooperated with the safety monitoring profession to ultimately control the displacement and deformation of the surrounding rock within a reasonable range.The duration of continuous increase in displacement and deformation of surrounding rock is relatively short.By analyzing the monitoring data during the excavation process of the factory building,the overall deformation pattern of the surrounding rock during the excavation of underground caverns in low stress and fractured rock masses was obtained.

关 键 词：地下厂房 围岩变形 低地应力 变形控制 时间较短 数据分析 整体规律 

分 类 号：TV223[水利工程—水工结构工程]