红旗泡水库冰层变形及护坡破坏现象成因分析

Causal analysis on ice layer deformation and slope protection damage of Hongqipao Reservoir

根据2008～2009年和2009～2010年冬季在红旗泡水库开展的冰层变形和护坡以及附属结构物破坏现象的现场观测,发现水库冰层有两次爬坡。第一次爬坡发生在入冬封库之后;第二次爬坡发生在开春快速升温时。两次爬坡的机理不同,分别对应水库结冰体积膨胀和冰层升温热膨胀,两次爬坡对护坡和附属结构物所产生的破坏程度也不同。文中给出冰层爬坡对护坡破坏程度的描述,并利用冰层生消过程和冰晶体结构的差异对冰层变形、爬坡原因和破坏能力做出分析。

According to the in-situ observation on the deformation of the iee layer and the damage of both the slope protection and the ancillary structures of Hongqipao Reservoir during the winters of 2008 - 2009 and 2009 - 2010, two times of ice ride-ups are found per winter. The first one occurred after the formation of ice cover in the early winter; the second one occurred during the rapid-rise of ice temperature in the early spring. Corresponding to the volume expansion from ice freezing and thermal expansion from ice temperature rise, the two times of ice ride-ups have different mechanisms, and then the damages from them on the slope protection and the ancillary structures are different as well. The damages from the ice ride-ups on the slope protection are described herein, furthermore, the deformation of the ice layer, the causation of the ice ride-up and its damage capability are analyzed in accordance with the processes of ice freezing and melting, and the differences among ice crystals.