海上锤击沉桩过程对既有引桥影响研究  

Influence of sinking piles with hammer at sea on the existing approach bridge

作　　者：薄其睿 李成川 尚文昌 高昌 刘俊伟[1] BO Qirui;LI Chengchuan;SHANG Wenchang;GAO Chang;LIU Junwei(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;Qingdao Port Construction Management Center Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266525 [2]青岛港建设管理中心有限公司,山东青岛266000

出　　处：《交通科学与工程》2025年第2期86-96,共11页Journal of Transport Science and Engineering

基　　金：国家自然科学基金面上项目(42277135);泰山学者工程专项经费资助项目(tsqn202211176);国家自然科学基金-山东联合基金项目(U2006225)。

摘　　要：【目的目的】探讨海上大直径开口钢管桩锤击沉桩对邻近既有引桥的影响,确保施工安全与质量,维护引桥稳定。【方法方法】采用高精度现场监测技术,对沉桩过程中引桥的振动、水平位移进行实时监测。【结果结果】既有引桥主要受竖直方向的振动和顺桥方向水平位移的影响,尤其是振源附近的桥墩,其响应更为显著。通过多元线性回归分析,揭示了振动速度峰值与打桩距离、贯入深度之间的关系。具体来说,在振源附近,打桩距离和贯入深度的回归系数分别为-0.635和0.568,表明振动速度随着打桩距离的增大而减小,随着贯入深度的增大而增大。相反,在远离振源的区域,打桩距离和贯入深度的回归系数分别为0.678和-0.422,表明振动速度随着打桩距离的增大而增大,随着贯入深度的增加而减小。此外,引桥的水平位移也随着打桩距离的增大而减小,尤其是在振源附近的桥墩,其水平位移更为显著。水平位移随贯入深度的增加呈先增大后减少的变化趋势,特别是在桩基入岩时,水平位移达到了峰值。【结论结论】揭示了土层-结构相互作用下位移与振动的复杂性,可为海上沉桩施工提供实时数据支持,也可为类似工程的安全控制与质量保障提供科学依据。[PurposesPurposes]This study aims to explore the influence of large-diameter open-ended steel pipe sinking piles with hammers at sea on adjacent existing approach bridge,ensuring construction safety and quality while maintaining the stability of the approach bridge.[MethodsMethods]High-precision on-site monitoring technology was employed to real-time monitor the vibration and horizontal displacement of the approach bridge during the pile sinking process.[FindingsFindings]The existing approach bridge is mainly affected by vertical vibration and horizontal displacement in the bridge direction,especially the bridge piers near the vibration source,where the response is more significant.Through multiple linear regression analysis,the complex relationship between the peak vibration velocity and the pile driving distance and penetration depth is revealed.Specifically,near the vibration source,the regression coefficients for pile driving distance and penetration depth are-0.635 and 0.568,respectively,indicating that the vibration velocity gradually decreases with increasing pile driving distance while increasing correspondingly with increasing penetration depth.Conversely,in the area far away from the vibration source,the regression coefficients of pile driving distance and penetration depth are 0.678 and-0.422,respectively,indicating that the vibration velocity increases with the increase in pile driving distance and decreases with the increase in penetration depth.In addition,the horizontal displacement of the approach bridge also decreases with the increase in pile driving distance,especially for the bridge piers near the vibration source,where the horizontal displacement is more significant.The horizontal displacement exhibits a trend of first increasing and then decreasing with penetration depth,reaching its peak when the pile foundation enters the rock.[ConclusionsConclusions]This study reveals the complexity of displacement and vibration under soil-structure interaction,providing real-time data support for offshor

关 键 词：锤击沉桩 大直径开口管桩 现场监测 既有引桥影响 多元线性回归 

分 类 号：TV221[水利工程—水工结构工程]