严寒地区水位变化区域护坡维修技术研究

Study of slope maintenance technique about water level change area in cold region

坝坡破坏最严重的部位多发生在水位变化区。辽宁省地处严寒地区,经分析认为,土石坝迎水坡处于水位变化区,由于冰推力、冻胀作用,冰层融化时风浪形成动冰撞击等因素,造成了上游护坡局部或大面积破坏。经大量的现场试验,提出了适合北方地区土坝水位变化区的六种复合型护坡结构。

The most serious damage of slope often occurred in water level change area.The Liaoning province is located in the cold region.Through the analysis,the paper obtains that upstream slope of earth-rock dam is in the water level change area,the part or large areas of upstream slope are destroyed by factors such as ice thrust,frost heaving and the impact of dynamic ice formed by wind wave while ice layer melting,etc,then puts forward six compound slope structures for water level change area of earth dam in north area by lots of field tests.