A Method Applicable to Alpine Reservoir Areas for Changing Ice Sheet Displacement

Abstract

The method of the present invention that is suitable for changing the displacement of the ice layer in the alpine reservoir area is to set an isolation floating belt at a distance of 50-100m from the buildings in the reservoir, and the two ends of the isolation floating belt are respectively fixed on both banks of the reservoir, and the isolation floating belt is provided with The fixing device is used to fix the isolation floating belt to ensure that it extends along a straight line. The beneficial effects of the present invention are as follows: the method for changing the displacement of the ice layer in the alpine reservoir area can intervene to a certain extent in the ice fault zone, so that the ice layer breaks along the predetermined direction, and the side where the ice layer is generated The pushing force is generated concentratedly along the set direction, which can effectively avoid the deformation of the buildings in the water and ensure the safety of the buildings in the water in the reservoir area; the method for changing the displacement of the ice layer suitable for the alpine reservoir area of ​​the present invention can be based on the water surface of the reservoir area. Width, set the buoy belt at one time, so as to change the ice fracture zone and avoid repeated operations.

Description

technical field [0001] The invention belongs to the technical field of water building maintenance, and in particular relates to a method for changing the displacement of an ice layer in an alpine reservoir area. Background technique [0002] The bridge project is located in the middle temperate continental monsoon climate. The climate is cold, and the number of days in winter (minimum temperature) below -20℃ is as long as 90-100 days; The final frost is in mid-May, the maximum freezing depth is 2.65 meters, and the maximum ice thickness varies from 0.65 to 1.74 meters. The project spans a local reservoir. The reservoir is 560m long and the water depth is 12-15m. There are steel trestle bridges and permanent bridge pile foundations and caps in the water. Under the action of load, the lower structure may suffer damage such as strength damage, high stress fatigue damage, foundation inclination and overturning, thereby reducing the durability and service life of the structure. ...

AI Technical Summary

Problems solved by technology

At present, there is a lack of calculation methods for the state of ice cracking, making it impossible to predict the response of ice cracking to bridges;

[0006] 3. The ice layer of the reservoir acts on the bridge for a long time, and the durability of the concrete structure will be reduced due to long-term cracking. It will also cause the pier to tilt due to plastic deformation of the foundation and concrete creep, and may even cause fatigue damage due to repeated actions.

At present, the existing research results can not meet the needs of design and calculation of deformation, durability and fatigue damage of reservoir bridges in cold regions;

[0007] 4. The newly built bridges in the reservoir area can increase the structural bearing capacity to meet the needs of ice resistance, but at a high price; the old bridges in the newly built reservoirs may need to be reinforced or take anti-icing measures due to insufficient bearing capacity

This type of anti-icing measures can play a good role in drift ice loads. Since the ice layer of the reservoir is thicker, and the static ice load of the reservoir is different from the flow ice of the river, the direction of action is clear, and its action direction is uncertain. Therefore, this type of anti-icing measures Ice measures cannot meet the anti-icing requirements of reservoir bridges

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