高压物理学报2025，Vol.39Issue(8)：103-113,11.DOI:10.11858/gywlxb.20251025
运河开挖爆破振动作用下桥梁桩基结构的动力响应特性
Dynamic Response Characteristics of Bridge Pile Foundation Structure Subjected to Blasting Vibration of Canal Excavation
摘要
Abstract
Blasting excavation is a critical construction method for enhancing the canal channel expansion efficiency.However,the induced blasting vibration may adversely affect the substructure of existing waterway bridges.To clarify the dynamic response characteristics of the bridge substructure subjected to blasting-induced vibration,this study analyzed the stress and vibration velocity distributions in the adjacent bridge substructure during the Pinglu Canal channel expansion project.A finite element numerical simulation method,validated by field test,was employed to establish the safe vibration velocity threshold for the substructure based on the maximum tensile stress criterion.The results show that the maximum tensile stress occurs at the interface between the bridge pile foundation and the pile cap during canal blasting excavation.The most significant vibrations in the substructure are concentrated in the pile foundation.The allowable vibration velocity for the bridge substructure,with the pile cap as the monitoring point,is 3.2 cm/s.关键词
爆破振动/桥梁桩基/有限元方法/动力响应Key words
blasting vibration/bridge pile foundation/finite element method/dynamic response分类
数理科学引用本文复制引用
何俊辉,程铁军,程晨,刘先林,蒋楠,邵羽,刘杨..运河开挖爆破振动作用下桥梁桩基结构的动力响应特性[J].高压物理学报,2025,39(8):103-113,11.基金项目
国家自然科学基金(42102329,52478525) （42102329,52478525）
湖北省自然科学基金杰出青年项目(2024AFA092) （2024AFA092）
湖北省重点研发计划(2021BAD004) （2021BAD004）
武汉市重点研发计划(2024050802030155) （2024050802030155）
