Development and Application of Leakage Treatment Technology for Aging Drainage Culverts in Urban Cities
Drainage culverts are essential municipal infrastructures in urban areas,serving critical functions such as flood control,rainwater and sewage collection,and transportation.However,aging drainage culverts have many leakage defects due to extended service life,substandard construction quality,and inadequate maintenance.These defects lead to soil erosion around the structures,creating voids that can cause road collapse and pose significant risks to urban safety.Combined with engineering practice,this study classifies leakage issues in drainage culverts into three main types according to their characteristics.Conventional single-method approaches often fail to provide long-term leakage prevention or meet the design requirements.To address these challenges,a targeted combined water-stop and leakage prevention technology was proposed,which has been successfully applied to the Huangxiaohe drainage culvert repairing project.The engineering application demonstrated that by utilizing the combined technology with suitable grouting materials and appropriate grouting pressure,a plugging success rate of 97.2％was achieved.This effectively resolved the leakage problem of aging drainage culverts and eliminated potential road collapse hazards.
drainage culvertsleakage defectswater-stop and seepage-stop
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