Abstract To systematically study the structural defects in drainage systems, a survey and statistical analysis of de? fects based on different drainage components were conducted. The characteristics of the defects were analyzed, and common defect diagrams for drainage systems were designed. An accurate and efficient defect recording method was proposed. Additionally, considering inspection conditions and commonly used detection methods, targeted inspection recommendations were provided for different drainage components. The research results indicate that functional defects in concrete components include crystallization, deposition, and obstructions, while structural defects are undulation and joint displacement. For polymer components, functional defects include crystallization and deposition,with structural defects being deformation, cracking, and undulation. Inspection challenges for drainage systems include their hidden nature, the lack of standardized inspection window designs, large spacing between inspection windows, the difficulty of long-distance inspections, and the diversity in layout, diameter, structure, and material of drainage components, making it difficult for a single inspection technique to cover all components. Endoscopy is suitable for circumferential blind pipe inspection, push-rod CCTV for longitudinal blind pipe inspection, endoscopy combined with ground-penetrating radar for transverse blind pipe inspection, and self-propelled CCTV combined with ground-penetrating radar for inspecting lateral drains and central drainage channels.
Abstract：
To systematically study the structural defects in drainage systems, a survey and statistical analysis of de? fects based on different drainage components were conducted. The characteristics of the defects were analyzed, and common defect diagrams for drainage systems were designed. An accurate and efficient defect recording method was proposed. Additionally, considering inspection conditions and commonly used detection methods, targeted inspection recommendations were provided for different drainage components. The research results indicate that functional defects in concrete components include crystallization, deposition, and obstructions, while structural defects are undulation and joint displacement. For polymer components, functional defects include crystallization and deposition,with structural defects being deformation, cracking, and undulation. Inspection challenges for drainage systems include their hidden nature, the lack of standardized inspection window designs, large spacing between inspection windows, the difficulty of long-distance inspections, and the diversity in layout, diameter, structure, and material of drainage components, making it difficult for a single inspection technique to cover all components. Endoscopy is suitable for circumferential blind pipe inspection, push-rod CCTV for longitudinal blind pipe inspection, endoscopy combined with ground-penetrating radar for transverse blind pipe inspection, and self-propelled CCTV combined with ground-penetrating radar for inspecting lateral drains and central drainage channels.
ZHANG Haonan LIU Yuyang TIAN Wei ZHANG Yixiao HAN Siyuan
.Classification of Structural Defects and Applicability Analysis of Detection Methods for Highway Tunnel Drainage Systems[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(5): 243-251
2024, Vol. 61 