华中科技大学学报（自然科学版）2025，Vol.53Issue(2)：17-24,8.DOI:10.13245/j.hust.250707
地层局部沉陷诱发有压管道渗透侵蚀机制研究
Study on mechanism of seepage erosion of pressure pipeline induced by local subsidence of stratum
摘要
Abstract
In order to study the influence of local subsidence on the flexible interface of pressure pipeline and the seepage erosion process of the surrounding strata after the leakage of the interface,the transparent soil technology and particle image velocimetry technology were combined to obtain the deformation characteristics of the surrounding strata and pipelines under the influence of excavation of foundation pit in a non-intrusive way.An analytical model for the rotation angle and interface opening value of flexible pipelines interface under the influence of local subsidence in the ground was proposed,and a three-dimensional visualization study of the mechanism of seepage erosion in the soil layer around the leakage interface of pressure pipelines was conducted.The results show that the opening value of the pipeline interface caused by the local subsidence of the'spandrel type'stratum is greater than that of the'groove type'stratum.The opening value of the pipeline interface caused by the horizontal displacement difference of the stratum is much larger than that caused by the vertical displacement difference of the stratum.The seepage erosion process is accompanied by the pipe-soil-water coupling effect.According to the evolution characteristics,it can be divided into three stages.The formation erosion damage will further aggravate the pipeline leakage.The research results have high reference value for the prediction and prevention of pipeline leakage caused by stratum subsidence.关键词
地层沉陷/有压管道/柔性接口/渗透侵蚀/三维可视/耦合作用Key words
land subsidence/pressure pipeline/flexible joint/seepage erosion/three-dimension visualization/linked reaction分类
土木建筑引用本文复制引用
倪小东,张宇科,陆江发,崔允亮..地层局部沉陷诱发有压管道渗透侵蚀机制研究[J].华中科技大学学报（自然科学版）,2025,53(2):17-24,8.基金项目
国家自然科学基金资助项目(51779083) （51779083）
城市基础设施智能化浙江省工程研究中心开放基金资助项目(IUI2022-ZD-02). （IUI2022-ZD-02）
