考虑渗透性的水-土压力计算方法

Methods for calculating soil-water pressure considering permeability

在弱渗透性黏性土中,水–土压力的计算采用"水土分算"还是"水土合算"一直是学术界和工程界有争论的问题。上述两种土压力计算方法只考虑了极端情况,没有充分考虑土体的物理特性,计算结果差异很大。笔者根据不同土具有不同渗透性这一基本物理特性,提出考虑渗透性的水–土压力计算方法,该方法概念明确,适用范围更广,可以实现从无黏性土到黏性土的水–土压力计算且具有连续性,最后通过算例验证了该方法的合理性。

There are two methods to calculate soil-water pressure in low permeability clay, soil-water pressure calculated jointly and soil-water pressure calculated separately. Which one to be taken to apply in engineering is controversial in academic and engineering circles. The two methods can only consider the extreme case, and the results are quite different. This is mainly because both methods do not fully take into account different physical properties of soils. A unified water-soil calculation formula considering the permeability of soils is proposed. This method is appropriate for most kinds of soils from sandy soil to clays and it ensures the continuity of earth pressure calculation. The concept of the method is very clear and the calculation can be used widely. Finally, the proposed method is validated by an example.