Study On Temperature Field Effect And Ice Surface Bearing Capacity Of Static Ice

In high latitudes,there is freezing phenomenon.Rivers and reservoirs will freeze and form ice sheet.The ice sheet will contact with hydraulic structures such as dams,piers and slope revetments.When the constrained ice sheet is heated,the internal temperature field will inevitably change,and the ice at different positions will have different strains,which will produce static ice pressure.When the static ice pressure is too large,it will cause damage to hydraulic structures.Therefore,it is necessary to study the variation law of ice temperature field,and then explore the static ice pressure.On the other hand,the ice sheet with increasing thickness has a certain bearing capacity,which can be used for people's activities,but from time to time,pedestrian or vehicle accidents will occur.Therefore,it is particularly important to study the ultimate carrying capacity of ice sheet and provide early warning for ice activities.In this paper,the static ice pressure and ice cap bearing capacity are studied by field measurement,theoretical research and numerical simulation,the specific research contents include the following aspects:(1)This paper studies the influence of wind speed on the distribution of temperature field in the ice layer under the air ice water coupling model,and explores the rationality of the assumption that the upper surface temperature of the ice layer is equal to the atmospheric temperature.(2)The distribution law of steady temperature field of ice layer with different thickness and the distribution law of transient temperature field and stress field of ice sheet with different time,different temperature rise rate,different initial temperature and different ice thickness are studied.(3)The ultimate bearing capacity of ice sheet under different load radius,ice thickness and temperature is studied.By the research of this paper,we can explore the related laws of static ice pressure and ice surface bearing capacity from the perspective of temperature,which most affects the nature of ice,and provide a useful reference for the further study of the effect of static ice pressure on hydraulic structures such as bridge piers and for the early warning of ice activities.