The rate of bedrock weathering by frost action: Field measurements and a predictive model
The rate of bedrock weathering by frost action: Field measurements and a predictive model
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霜冻作用导致基岩风化的速率：现场测量和预测模型
DOI：
10.1002/esp.3290150108
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发表时间：
1990
影响因子：
3.3
通讯作者：
N. Matsuoka
中科院分区：
文献类型：
--
作者：
N. Matsuoka
在日本阿尔卑斯山的四个岩壁地点测量了破碎率、表面温度、含水量以及基岩的物理和强度特性。五年观测表明，10月至次年5月冻融期基岩破碎率通常远高于6月至9月无霜期。这表明霜冻作用是最重要的破碎过程，尽管夏季异常的暴雨也是造成破碎的原因。结合最近实验室实验得出的一些经验关系，得出了霜冻破碎率的预测模型。该模型表明，年破碎率取决于岩石表面年冻融频率以及岩体的饱和度和抗拉强度。模型中涉及的系数是使用现场数据确定的。
Shattering rate, surface temperature, moisture content, and the physical and strength properties of bedrock were measured in four rockwall sites of the Japanese Alps. Five-year observations revealed that the bedrock shattering rate was usually much higher in the freeze-thaw period from October to next May than in the frost-free period from June to September. This indicates that frost action is the most important shattering process, although unusual heavy rainstorms in summer are also responsible for the shattering. A combination of some empirical relationships derived from recent laboratory experiments leads to a predictive model of the frost shattering rate. This model shows that the annual shattering rate is dependent on the annual freeze-thaw frequency on the rock surface, and the degree of saturation and tensile strength of the rock masses. The coefficients involved in the model were determined using the field data.