Method suitable for changing ice layer displacement in high and cold reservoir area

Abstract

The invention discloses a method suitable for changing ice layer displacement in a high and cold reservoir area. An isolation floating belt is arranged at the position 50-100m away from a building ina reservoir, the two ends of the isolation floating belt are fixed to the two sides of the reservoir correspondingly, and a fixing device is arranged on the isolation floating belt and used for fixingthe isolation floating belt to ensure that the isolation floating belt extends along a straight line. The method has the beneficial effects that the method suitable for changing ice layer displacement in the high and cold reservoir area can generate certain intervention on an ice layer fracture zone, an ice layer is fractured in the set direction, side pushing stress generated by the ice layer isgenerated in a concentrated manner in the set direction, so that deformation of the building in water can be effectively avoided, and the building in water is safely used in the reservoir area; and according to the method suitable for changing ice layer displacement in the high and cold reservoir area, a floating barrel belt can be arranged at a time according to the water surface width of the reservoir area, and therefore the ice layer fracture zone is changed, and repeated operation is avoided.

Description

technical field [0001] The invention belongs to the technical field of water building maintenance, and in particular relates to a method suitable for changing the displacement of ice layers in alpine reservoir areas. Background technique [0002] The bridge project is located in the mid-temperate continental monsoon climate, the climate is cold, and the number of days in winter (minimum temperature) below -20°C is as long as 90-100 days; the annual average frost-free period is 60-130 days, and the first frost is in mid-September. The last frost is in mid-May, the maximum freezing depth is 2.65 meters, and the maximum ice thickness is 0.65-1.74m. The project spans a local reservoir, the reservoir is 560m long, and the water depth is 12-15m. In the water, there are steel trestle bridges and bridge permanent building pile foundations and caps. If effective measures are not taken before the water in the reservoir area freezes, the bridge structure will Under the action of load,...

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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