The Protection Measures Of Ice Load Attack Of Pier In Luo Po Ling Reservoir

In modern times,bridges destroyed by ice occur frequently due to the lack of necessary protection measures.Therefore,it is necessary to consider the interaction of ice and bridge and take reasonable protective measures to minimize possible damage by ice,when designing and constructing bridges in potentially icy water,which has become a problem urgently needs to be solved in the construction and use of hydraulic structures in cold regions.Based on the bridge piers of Luo Po Ling Reservoir in Beijing Fengtai-Shacheng Railway,aiming at the brigde piers may suffer extrusion and collision from floating ice,analyze the interaction mechanism between ice load and bridge pier,and then evaluate the stability of the pier.According that,three kinds of protection measures are put forward to prevent the pier from being damged by ice and slove the main problems existing in the prior technology.Aiming at the practical engineering,this paper simulates the process of static ice extrusion and ice impact pier through the quasi-static analysis method and the dynamic display analysis method by the universal finite element software ABAQUS,and carries out safety evaluation on the stability of piers under the most unfavorable load combination by the relevant specifications and standards.According to the specific size of the pier,an icebreaker device with high strength level and tip-on ice surface is designed,in order to reduce the damage caused by the ice load to the bridge piers,making up for deficiencies in existing protective measures.The feasibility of the program is proved through theoretical analysis and experimental research.Floating tank type ice-melting device combined with active and passive protection methods and light sleeve device are also designed.The specific implementation method is introduced in detail by combining actual engineering problems.FLUENT numerical simulation software is used to further analyze the influence of different electrical heating layouts in the protection device on the safe ice melting distance,verifying applicability of the scheme which provides theoretical value and guiding significance for research on protective measures of hydraulic structures in cold regions of China.