市政排水管抗震計算分析研究
范雪美，許爍楷
（廣州市設計院集團有限公司，廣州 510620）
摘 要：市政排水管由于其線性延伸的特性，穿越不同的地質條件和城市區域，在地震作用下易遭受損傷，進而導致城鎮排水系統癱瘓，并引起一系列次生災害。本文以筆者參與設計的道路工程為例，通過引用《建筑與市政工程抗震通用規范》（GB55002-2021）等多個工程設計規范，計算驗證管道的抗震達標性，并從管材、接口性質、接頭總數、管徑、管道基礎等不同角度分析管道抗震能力的影響因素。結果呈現在相同埋設條件下，管道抗震能力球墨鑄鐵管＞鋼筋混凝土管＞HDPE雙壁波紋管，抗震變位分別優于規范規定的下限2mm和7mm；柔性連接＞剛性連接98mm；16個接頭＞6個接頭64mm；大管徑＞小管徑0.1-1.4mm；柔性基礎＞剛性基礎2.4mm。為提高市政排水管抗震能力，本文建議工程設計時擇優采用以上抗震較強值。
關鍵詞：抗震；市政排水管
中圖分類號：TU991 文獻標識碼：A 文章編號：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
