公路隧道排水系统结构病害分类及适用性检测分析

Classification of Structural Defects and Applicability Analysis of Detection Methods for Highway Tunnel Drainage Systems

为了系统性研究排水系统结构病害,按排水构件类型进行病害调研统计,分析病害的特征并设计常见的排水系统病害示意图,提出准确高效的排水系统病害记录方式,同时,综合考虑检测条件和常用检测方式,为不同的排水构件给出针对性检测建议。研究结果表明:混凝土构件功能性病害为结晶、沉积、障碍物,其结构性病害为起伏、错口;高分子构件功能性病害有结晶、沉积,其结构性病害为变形、破裂、起伏;排水系统检测存在排水系统为隐蔽工程,排水构件检测窗口设计尚未规范统一,检测窗口布设间距大,长距离检测难度大,排水构件的布设方式、管径、构造和材质上具有多样性,单一检测手段难以实现所有构件的检测等难点;内窥镜适用于环向盲管检测、推杆式CCTV适用于纵向盲管检测、内窥镜加探地雷达辅助适用于横向盲管检测、自行式CCTV加探地雷达辅助适用于侧式暗沟和中央排水沟的检测。

To systematically study the structural defects in drainage systems,a survey and statistical analysis of defects 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.