Corrosion Research For The Coastal Region Trunk Highway Bridge Pile

Paper for Marina area reinforced concrete bridge pier column by seawater corrosion and pile head itself construction defects reasons, appeared of concrete failure bad of, and pile head concrete off and pile base steel exposed rust, that to bridge structure brings of durability problem, to Shandong province road S315 FuGuo bridge dangerous bridge transformation engineering for background, carried out BinZhou General country province route highway bridge pile column anti-corrosion measures of research. Major research includes:1, and Marina area Highway reinforced concrete bridge more general of exists due to by air, and water and soil in the Cl-, and SO42- ion corrosion and premature failure and deterioration of concrete problems. Through on reinforced concrete bridge of bad of reasons and mechanism for system analysis research; in analysis various concrete raw materials, and reduction agent and activity mix material, of structure composition of based, optimization concrete raw materials, strictly control water rubber than, mixed added efficient reduction agent, and added activity mix material Super fine powder, on FuGou bridge widened new pier column concrete tie for detailed of durability design, to reached improve concrete of dense sex, extended concrete using life of purpose;2, a large number of cases in recent years, coastal and marine environments, splash zone and water level fluctuation zone due to the splash of the waves and erosion is usually wet, poor concrete environment, more prone to corrosion. A simple protective measures have been difficult to ensure that the performance of the concrete structures in corrosive environments. Through analysis common concrete anti-corrosion coating of material composition and compared its advantages and disadvantages, combined anti-corrosion using life, proposed used ring oxygen closed primer+ring oxygen Middle paint+acrylic polyurethane surface paint anti-corrosion system of design combination, design out for FuGou bridge of concrete anti-corrosion coating system, targeted of proposed has construction technology requirements and quality control requirements, made has better of construction effect; through concrete anti-corrosion coating of design and construction, basic solution has simple to improve concrete dense sex mainly of design thought, Extend the life of concrete bridge, a reduced maintenance workload and the maintenance costs of the bridge components has made a good attempt.3, and pile based pile head parts missing vibration pound process of application, General caused pile head parts concrete dense sex poor, especially in Wade bridge in the long time by flow scour, role, easy caused pile head exposed and long-term in wet and dry cycle State, pile based steel rust caused concrete expansion crack off, and further increased steel of rust, even main reinforced rust broken of phenomenon occurred, to bridge structure of security caused huge of hidden. Through rich analysis and research on construction technology for bridge pile foundation bridge widening, BinZhou region sets used in water level fluctuation zone of steel pipe for the first time, to ensure concrete pile foundation pile head against sea erosion, fundamentally solve the pile of pile exposed concrete is not dense, loss caused by exposed steel reinforcements rust affecting the safety of bridge structure caused by disease. Both steel casing for concrete protection layer pile with emphasis on the main stream of the protection, improves the durability of concrete piles.To sum up, the paper province, province road S315 FuGuo theory of anti-corrosion measures of research and field construction technology, combined with the theory of material characteristics, experience and diseases of bridge structure, comprehensive analysis to identify the key, puts forward a practicable solution, and implement, achieve the better technical results and social benefits. Through the design and implementation of more projects for anti-corrosion measures and anticorrosion measures of highway bridges in coastal areas is of great practical significance.