Introduction. The article investigates the technological process of restoring culverts on highways using the relining method with corrugated metal structures (CMS). Technical requirements for CMS sections, types of band connections, and sealing materials are analyzed. The sequence of preparatory and main installation works, including the use of special equipment such as mounting trolleys and winches, is described in detail. Quality control criteria and maximum deviations of geometric parameters during construction are determined.
Problem Statement. The main defects requiring repair by the relining method are waterproofness failure and displacement of pipe elements exceeding 3% of its diameter. The main challenge is to restore the structural load-bearing capacity in confined space conditions without stopping road operation, while ensuring sufficient water discharge capacity after the opening narrows.
Purpose. The aim of the study is to substantiate the technological features of using CMS for relining defective pipes, develop a detailed work execution regulation, and determine material requirements that ensure an operational lifespan of the structure up to 50 years.
Materials and methods. The study examines corrugated metal structures made of hot-dip galvanized steel (class Z600) with an optional additional polymer coating (HDPE). Relining methods based on the installation of new sections inside defective pipes followed by band connection and sealing are considered.
Results. It has been established that relining allows for repairs without stopping traffic and reduces the work duration to two days. Optimal types of band connections (flat, corrugated, semi-corrugated bands) are determined depending on the pipe diameter (from 0.3 m to over 0.9 m). An algorithm for assessing the condition of the structure has been formed, which includes field inspection, defect geometry analysis, and hydrological calculations.
Conclusions. The use of the relining method with CMS is an economically viable and technologically efficient way to restore the water discharge capacity and strength of defective pipes. Adherence to technological operations, such as the correct choice of band connections and high-quality sealing, guarantees the long-term reliable operation of transport structures.
