Maintenance Status of Foreign Highway Tunnels

What is the tunnel maintenance, tunnel maintenance management to control what, rely on what conservation management ... ... around the tunnel management and management of the subject, object and purpose of the basic elements of management activities, PIARC (World Road Association) carried out a large number of basic research. In fact, the above issues in the world of the current provisions and understanding are not the same.

For conservation management purposes, several countries in Europe define it as "a series of actions that maintain or restore tunnels to a given state or take measures to provide a definite service", and Quebec, Canada, "The purpose of tunnel maintenance is to ensure that the tunnel users to achieve the original design of the provisions of the safety level." PIARC concluded that the goal of tunnel maintenance is to ensure the safety of the public by keeping the tunnel in the design of safety standards; to riskless investment in the surrounding and maintenance workers;
For the content of conservation management, the PI ARC conducted a survey of some European countries (see Table 1) in 2005 and conducted similar investigations in 31 countries in Europe in 2012. The results show that for the traffic monitoring and management, the vast majority of countries are classified as "operational" areas; for the management of electromechanical facilities, part of the "conservation" category, part of the "operating" category;
It is divided into preventive maintenance and tunneling conservation conservation, in which preventive maintenance is divided into periodic conservation and state conservation. Preventive maintenance can keep the tunnel facilities in a safe and safe state, or avoid costly maintenance. According to the results of different conservation test evaluation, corrective maintenance work in the event of disease, according to suspend maintenance and immediate maintenance for processing. The maintenance work is divided into six levels according to the technical level: structural cleaning, equipment cleaning, testing, calibration, measurement, planned intervention, unplanned intervention, refurbishment.
It also suggested that a tunnel management system should be established and that functions such as maintenance or operational work plans, cost analysis, optimization of conservation work and technical feedback should be undertaken. As Europe and the United States and Japan and other countries focus on the construction of highway infrastructure are earlier, the tunnel operation has lasted 50 years, or even more than 100 years, has accumulated a wealth of conservation technology experience and research results, mainly in the following areas: Most countries have a clear positioning of the purpose of conservation, the conservation of various types of institutions and their staff responsibilities are clearly defined, and ultimately from the system to effectively implement the "management, support, transport" separation.
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Concept: to promote the concept of preventive conservation, some countries in the accumulation of years of historical data, and then analyze and master the various types of facilities in the tunnel life and deterioration of the law on the basis of the development of specific measures.In the aspect of assessment, a method of assessing the technical status of a combination of qualitative and quantitative indicators is established for the civil structure, and a technical condition assessment method for multi-dimensional and multi-index is established for electromechanical facilities.Means: the general implementation and implementation of mechanization, rapid detection means, information technology, intelligent management tools, standardized, standardized means of work and other advanced means.Economic aspects: Facing the balance between conservation earnings and closure operations, focusing on the balance between preventive maintenance and corrective conservation, focusing on the balance between conservation inputs and tunnel safety, and advocating cost control under life-sustaining scientific conservation plans.