DONGShun,LIAOJiajie,HUANGSheng,et al.Design of Drainage Pipeline Rehabilitation Using Spray Lining Technology Based on Liner Thickness Calculation Theory[J].China Water & Wastewater,2026,42(12):1-8.
基于内衬壁厚计算理论的排水管喷涂修复设计
- Title:
- Design of Drainage Pipeline Rehabilitation Using Spray Lining Technology Based on Liner Thickness Calculation Theory
- Keywords:
- drainage pipelines; spray lining technology; liner thickness; rehabilitation; mechanical properties; structural ductility
- 摘要:
- 针对排水管道在长期服役过程中普遍出现的腐蚀老化、裂缝扩展及结构抗力下降等问题，传统砂浆喷涂修复方法中内衬壁厚的确定缺乏科学设计与验证。本研究通过对比分析砂浆喷涂修复前后排水管道的力学性能，探究基于内衬壁厚计算理论的足尺排水管道结构性能影响规律。结果表明，内衬壁厚的优化对提升管道承载能力与耐久性至关重要。当内衬壁厚由33 mm增至45 mm时，排水管道的极限承载力从60.54 kN提高至93.83 kN，增幅达55%。此外，引入的内衬壁厚计算理论能够更为系统地反映修复后排水管道的实际承载能力，为非开挖修复技术提供科学的设计依据。
- Abstract:
- Addressing the common issues of corrosion aging, crack propagation, and the gradual reduction of structural resistance in drainage pipelines during long-term service, the traditional mortar- spraying rehabilitation method lacks a scientific design and validation for determining the liner thickness. This study examines the impact of liner thickness on the structural performance of full-scale drainage pipelines by comparing the mechanical properties before and after mortar-spraying rehabilitation. The findings highlight the critical importance of optimizing liner thickness to enhance the load-bearing capacity and durability of the pipelines. Specifically, increasing the liner thickness from 33 mm to 45 mm raised the ultimate load capacity of the drainage pipelines from 60.54 kN to 93.83 kN, representing an increase of 55%. Furthermore, the introduced calculation theory of liner thickness could provide a more systematic reflection of the actual load capacity of the drainage pipelines after rehabilitation, offering a scientific basis for trenchless repair techniques.
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