某水库大坝保护范围内爆破开挖对大坝结构安全性影响分析  

Analysis on the Impact of Blasting Excavation within the Protection Range of a Reservoir Dam on Dam Structural Safety

作　　者：孔宇田 李艳娜 孙卫 鲍伟 李永 KONG Yutian;LI Yanna;SUN Wei;BAO Wei;LI Yong(Power China Guiyang Engineering Corporation Limited,Guiyang 550081,China;Guizhou Equipment Manufacturing Polytechnic,Guiyang 551400,China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081 [2]贵州装备制造职业学院,贵州贵阳551400

出　　处：《云南水力发电》2024年第5期58-61,66,共5页Yunnan Water Power

摘　　要：当爆破开挖施工距离大坝较近时,爆破振动必然会对大坝的结构安全性产生一定程度的不良影响。分析爆破振动对大坝结构安全性的影响范围和影响程度,并对爆破开挖方案和施工期大坝安全防护提出合理建议是设计和施工中必须考虑的一个重要问题。结合南一水库大坝保护范围内左岸新建取水口及隧洞工程,建立混凝土重力坝爆破振动响应数值模型,对大坝在爆破振动过程中的应力特征和坝体振速进行分析,评价爆破振动对大坝结构安全性的影响,对类似爆破开挖工程有一定的参考价值。When the blasting excavation construction is close to the dam,the blasting vibration will inevitably have a certain degree of adverse impact on the structural safety of the dam.Analyzing the impact range and degree of blasting vibration on the safety of dam structures,and providing reasonable suggestions for blasting excavation schemes and dam safety protection during construction are important issues that must be considered in design and construction.Based on the construction of a new water intake and tunnel on the left bank within the protection range of Nanyi Reservoir Dam,a numerical model of the blasting vibration response of a concrete gravity dam is established.The stress characteristics and vibration speed of the dam during the blasting vibration process are analyzed,and the impact of blasting vibration on the safety of the dam structure is evaluated,which has certain reference value for similar blasting excavation projects.

关 键 词：爆破开挖 大坝结构安全 坝体动应力 坝体振速 影响分析 

分 类 号：TV698.11[水利工程—水利水电工程]