Submerged Structures On Lakeshore-Analysis And Prevention Of Freezing Damage In Deep Water Berth

Many submerged structures are distributed in the vast cold regions of China.When it comes to the cold period,the submerged structures with high pile caps are easy to suffer from freezing damage due to their light weight.In order to explore and control the freezing damage of submerged structures with high pile cap structure in low temperature environment.In this paper,the deep-water slipway,a typical submerged structure with high pile cap structure,is taken as an example to design the vertical displacement observation experiment and field temperature observation experiment of deep-water shipway.SPSS software is used to analyze the experimental data and summarize the relationship between the vertical displacement of deep-water berth and air temperature.Based on the experimental data,the curves are drawn,and the measured data are analyzed combined with the characteristics of ice and the principle of static ice pressure.The mechanism of freezing damage and the law of lifting and lowering of deep-water berth are deeply analyzed,and the anti freezing measures are put forward.The contents of this paper are as follows:(1)During the cold period,the vertical displacement of 5 independent slipways of No.3 slipway group in Nanhu Park was measured accurately,and the temperature change data during the cold period was recorded synchronously.(2)SPSS software is used to describe the data of vertical displacement and temperature of deep-water slipway,and then the correlation analysis and regression analysis are carried out.Finally,the functional relationship between vertical displacement and temperature is obtained.(3)The vertical displacement data and temperature data of each slipway are plotted.Combined with the principle of static ice pressure and curve chart,the freezing damage mechanism of deep-water slipway is analyzed.It is concluded that the freezing damage of deep-water slipway is mainly related to ice expansion force,ice temperature expansion force and drawing force in static ice pressure.It is concluded that the lifting law of deep-water shipway presents "nearly sinusoidal curve" attitude fluctuation and is verified.(4)Based on the analysis of the freezing damage mechanism of deep-water berth,the comparison of different structural forms of deep-water berth,and the comparison between deep-water berth and open-pit berth,the conclusions of the three are put forward,two anti freezing design concepts and two anti freezing structural measures are put forward,and they are extended to the submerged structures with high pile cap structure.