地下管线在基坑开挖过程中变形规律的分析及关键影响因素研究  

Analysis of Deformation Law of Underground Pipelines During Foundation Pit Excavation and Key Influencing Factors Research

作　　者：陈一鸣 CHEN Yi-ming(China Railway 19th Bureau Group Rail Transit Engineering Co.Ltd.,Beijing 101300,China)

机构地区：[1]中铁十九局集团轨道交通工程有限公司,北京101300

出　　处：《工程建设与设计》2024年第8期19-21,共3页Construction & Design for Engineering

摘　　要：对地下管线在基坑开挖中的变形规律进行分析,采用地基模型改进、管线模型简化和边界条件设置等技术手段进行方法优化。研究结果表明,在地表超载条件下,管线的竖向位移和水平位移都显著增加,分别约为原来的2.6倍和4.4倍,最大竖向位移约为3.1 mm,最大水平位移约为-4.2 mm。同时,竖向和水平弯矩增幅达21.2%和37.8%,表明地表超载对管线的位移和弯矩产生显著影响,尤其是对水平位移和水平弯矩的影响更为明显。The deformation law of underground pipeline in foundation pit excavation is analyzed,and the method is optimized by improving foundation model,simplifying pipeline model and setting boundary conditions.Research results show that under surface overload conditions,both the vertical and horizontal displacements of the pipeline increase significantly,approximately 2.6 times and 4.4 times respectively.The maximum vertical displacement is approximately 3.1 mm,and the maximum horizontal displacement is approximately-4.2 mm.At the same time,the vertical and horizontal bending moments increased by 21.2%and 37.8%,which shows that surface overload has a significant impact on the displacement and bending moment of the pipeline,especially the impact on the horizontal displacement and horizontal bending moment.

关 键 词：地下管线 基坑开挖 变形规律 地表超载 

分 类 号：TU990.3[建筑科学—市政工程] TU470.3