Structural durability design parameters of reinforced concrete in estuary ship lock affected by salt water intrusion
During the service process,the estuary ship-lock was affected by the downstream seawater intrusion,coupled with the frequent irrigation and discharge of water during the operation of the ship-lock,the ship-lock structure is subject to a higher frequency of drying-wetting alternations based on the mixed salt water than that of marine tidal environment.The reinforced concrete(RC)structure of ship-lock is susceptible to corrosion under the complex environment of high frequency drying-wetting alternations of mixed salt water,and the structural durability issues is prominent.However,the durability design parameters of estuary ship-lock RC structure have not been specified in standards.Therefore,for this paper′s investigations,the corrosion degrees of environmental water corrosion factors on the ship-lock structure after the ship-lock engineering complete were deduced on the basis of field measurements.Combined with the current design standards related to RC durability in China,the durability design parameters of estuary ship-lock RC structure are preliminarily determined,including the concrete strength grade,water-binder ratio,cover layer thickness,etc.On this basis,considering the engineering quality problems caused by hydration and heat release of mass concrete during the construction process and relying on the relevant design data of existing projects,the proposed values of RC structural durability design parameters for estuary ship-lock affected by salt water intrusion are put forward.The findings of this paper can provide data reference and technical support for practical engineering design.
万方数据
维普
