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土体在地下水迳流的脉动作用下,其微观结构遭到破坏是土洞形成与发展的重要因素之一,确定搬运土体土粒的临界水力梯度可以帮助预测土洞的形成与发展,本文给出了由潜蚀作用形成土洞所需的临界水力梯度计算公式。
Under the pulse action of groundwater turbulence, soil is destroyed by the soil’s microscopic structure, which is one of the important factors for the formation and development of earth holes. Determining the critical hydraulic gradient of the soil particles in the transported soil can help predict the formation and development of soil holes. The formula for calculating the critical hydraulic gradient required for the formation of a hole in the earth by subsurface erosion is given.