摘要
以上海某防汛墙桩基施工对既有穿河倒虹管影响为例,采用有限元方法建立了桩-土-倒虹供水管相互作用的动力分析模型,研究振冲沉桩施工距离对管道的影响规律,并分析群桩施工顺序对管道的综合影响。研究结果表明:打桩振动对管道的影响以竖向位移为主;随着桩基与倒虹供水管的水平净距增大,打桩振动对管道的影响逐渐减小;桩群施工时,管道周边桩基采用由毗邻管道处向两侧交替施打的施工顺序对管道影响较小。
Taking the influence of pile foundation construction for a flood control wall in Shanghai on the existing cross-river inverted siphon as an example, this paper establishes a dynamic analysis model of pile-soil-inverted water-supply siphon interaction by the finite element method, studies the influence rule of construction distance of vibroflotation pile sinking on the pipes, and analyzes the comprehensive influence of pile group construction sequence on the pipes. The study results show that the influence of pile driving vibrations on pipes is mainly vertical displacement. With the increase of horizontal distance between pile foundation and inverted water-supply siphon, the influence of pile driving vibration on pipes gradually decreases. In pile group construction for the surrounding pile foundation of pipe, the construction sequence of both-side alternating driving at the adjacent pipelines has little influence on the pipeline.
出处
《城市道桥与防洪》
2019年第12期108-111,M0012,共5页
Urban Roads Bridges & Flood Control
关键词
振冲沉桩
穿河倒虹管
动力有限元分析
群桩施工顺序
vibroflotation pile sinking
cross-river inverted siphon
dynamic finite element analysis
pile group construction sequence
