摘要
随着长江经济带的发展,葛洲坝3号船闸已经不能满足通航能力要求,拟拆除扩建。针对拆除部位距保护对象较近,且所处位置地质条件复杂,爆破拆除可能引发振动破坏的问题,采用数值模拟和工程类比相结合的方法,研究了葛洲坝3号大型钢筋混凝土船闸的拆除方案,分析了各保护对象的爆破振动响应特性及爆破振动控制措施。提出了以爆破拆除为主、机械拆除为辅的拆除方案,总体上将船闸结构分为设施设备及框架结构、大体积柱状钢筋混凝土结构、板状钢筋混凝土结构3部分进行拆除。数值计算结果表明:爆破拆除施工中,3号船闸保留的右侧闸墙、冲沙闸、防渗帷幕受爆破振动响应较大,施工时应加强这些部位的振动监测,并提出了相应的爆破振动控制标准及措施。研究成果可为类似工程的爆破拆除施工提供参考。
With the development of the Yangtze River Economic Belt,the No.3 ship lock of Gezhouba hydro-junction has been unable to meet the requirements of navigation capacity and is planned to be demolished and expanded.Aiming at the problems that the demolition site is close to the protected object,complex geological condition and vibration damage caused by blasting demolition,the demolition scheme was studied by numerical simulation and engineering analogy method,and the blasting vibration response characteristics of each protected object and the control measures of blasting vibration were analyzed.A demolition scheme with blasting demolition as the main part and mechanical demolition as the auxiliary part was put forward.On the whole,the ship lock structure was demolished in three parts:facility and frame structure,large volume column reinforced concrete structure and slab reinforced concrete structure.The numerical calculation results showed that during demolition blasting,the blasting vibration response of reserved right side gate wall,sand discharge sluice and impervious curtain of No.3 ship lock was large.The vibration monitoring of these parts should be strengthened during construction,and the corresponding control standards and measures for blasting vibration were proposed.The research results can provide reference for blasting demolition construction in similar projects.
作者
孙颖
苏利军
陈明
董恒
魏东
SUN Ying;SU Lijun;CHEN Ming;DONG Heng;WEI Dong(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;Changjiang Surevy,Planning,Design and Research,Co.,Ltd.,Wuhan 430010,China)
出处
《人民长江》
北大核心
2020年第4期184-190,共7页
Yangtze River
基金
国家重点研发计划项目(2016YFC0402008)
国家自然科学基金资助项目(51779193)。
关键词
爆破拆除
爆破振动
数值模拟
工程类比
葛洲坝3号船闸
blasting demolition
numerical simulation
engineering analogy
blasting vibration
No.3 ship lock of Gezhouba hydro-junction
