岩土工程学报2025，Vol.47Issue(11)：2285-2294,10.DOI:10.11779/CJGE20240629
变化淹没水位下供水管道渗漏诱发砂土流化启动准则解析
Formulation of initiation criterion for sand fluidization induced by water supply pipe leakage under varying inundation levels
摘要
Abstract
Leakage from water supply pipelines can induce fluidization of overlying sand,leading to subsurface voids and ground subsidence.Current experimental and theoretical studies generally focuse on continuously graded saturated sand,neglecting unsaturated and intermittently graded conditions.This study considers factors such as sand particle size,grading,pipeline submergence level,overburden depth,and leakage orifice size.Based on the balance of sand's weight and seepage forces,an analytical formula is derived for the initiation flow rate of sand fluidization under varying submergence levels,Model tests are used to validate this formula.Results show that reducing submergence levels,increasing sand particle size,and overburden depth will decrease the initiation flow rate,while orifice size has no significant impact.In additions considering the practical proposed situation that there is no fixed boundary for pipe lakeage and fludization of overlying sand,empirically modified the Ergun equation is to better describe fluid pressure drop in sand under local pipeline leakage conditions.关键词
供水管道/砂土流化/启动流量/淹没水位/间断级配Key words
water supply pipeline/sand fluidization/initiation flow rate/submerged water level/intermittent grading分类
土木建筑引用本文复制引用
林存刚,彭程,李丁伟,龚婉仪,马保松..变化淹没水位下供水管道渗漏诱发砂土流化启动准则解析[J].岩土工程学报,2025,47(11):2285-2294,10.基金项目
广东省基础与应用基础研究基金项目(2023A1515030243,2024A1515011200) （2023A1515030243,2024A1515011200）
珠海市基础与应用基础课题研究项目(ZH22017003210005 PWC) （ZH22017003210005 PWC）
广东省"珠江人才计划"引进创新创业团队项目(2021ZT09G087) （2021ZT09G087）
国家自然科学基金项目(42477202)This work was financially supported by Guangdong Basic and Applied Basic Research Foundation,(Grant Nos.2023A1515030243 and 2024A1515011200),Zhuhai Basic and Applied Basic Research Foundation(Grant No.ZH22017003210005PWC),Department of Science and Technology of Guangdong Province(Grant No.2021ZT09G087),and National Natural Science Foundation of China(Grant No.42477202). （42477202）
