市政排水管抗震计算分析研究
范雪美，许烁楷
（广州市设计院集团有限公司，广州 510620）
摘 要：市政排水管由于其线性延伸的特性，穿越不同的地质条件和城市区域，在地震作用下易遭受损伤，进而导致城镇排水系统瘫痪，并引起一系列次生灾害。本文以笔者参与设计的道路工程为例，通过引用《建筑与市政工程抗震通用规范》（GB55002-2021）等多个工程设计规范，计算验证管道的抗震达标性，并从管材、接口性质、接头总数、管径、管道基础等不同角度分析管道抗震能力的影响因素。结果呈现在相同埋设条件下，管道抗震能力球墨铸铁管＞钢筋混凝土管＞HDPE双壁波纹管，抗震变位分别优于规范规定的下限2mm和7mm；柔性连接＞刚性连接98mm；16个接头＞6个接头64mm；大管径＞小管径0.1-1.4mm；柔性基础＞刚性基础2.4mm。为提高市政排水管抗震能力，本文建议工程设计时择优采用以上抗震较强值。
关键词：抗震；市政排水管
中图分类号：TU991 文献标识码：A 文章编号：1000-4602（XXXX）XX
Seismic calculation and analysis of municipal drainage pipes
Fan Xue-mei Bei1，
(1. Guangzhou Design Institute Group Co Ltd.， Guangzhou 510000）
Abstract:
Municipal drainage pipelines,due to their linear nature and exposure to varying geological/urban conditions,are vulnerable to seismic damage,risking system failure. Using multiple Engineering Design Specifications,GB55002-2021 etc., this study verifies pipeline seismic compliance and evaluates influencing factors such as material and diameter of pipes, number and form of joints, foundation. The results reveal that under identical burial, seismic displacements surpass the lower limit of the specification by 2mm and 7mm respectively in the regards of pipe material: ductile iron > reinforced concrete > HDPE; flexible connections surpass 98 mm than rigid one; 16 of joints surpass 6 of joints by 64 mm; larger diameter surpass minor diameter by 0.1–1.4 mm; flexible foundation surpass rigid one by 2.4 mm. To enhances seismic resilience of municipal drainage pipeline,we propose prioritizing ductile iron,flexible connections, optimized joint counts, larger diameters, and flexible foundations in design.
Key words: drainage pipes； seismic design
