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针对当前水土压力计算中很少考虑土自身性质对其影响的研究现状,以自制试验槽为研究工具,通过使用3种不同渗透性土样进行的支挡结构上水土压力测试研究,对比了水土压力实测值和由水土压力分算、水土压力合算得到的理论计算值,分析了孔隙水压力和土压力的变化规律。由试验结果可以得到,由水土压力合算得到结果偏小,但在一定条件下尚可以接受,在发生主动位移情况下墙后土体会产生负超孔压,渗透系数影响着负超孔压的消散和孔隙水压力的传递程度,并进一步影响支挡结构上水土压力的分布情况。由试验结果推知,当土体渗透系数小到一定程度时,水土压力合算的方法是合理的。
In view of the current research status of soil-water pressure calculation, which seldom consider the influence of soil’s own property on it, the self-made test trough is taken as the research tool. Through the soil-water pressure test on the support structure using three kinds of different permeable soil samples, The measured value of pressure and the calculated theoretical value obtained from the calculation of soil-water pressure and water-soil-pressure, and analyzes the variation of pore-water pressure and earth pressure. From the test results, we can get the conclusion that the result is small by the sum of soil and water pressure, but it is acceptable under certain conditions. Under the circumstances of active displacement, the negative soil pore pressure will produce negative excess pore pressure and the permeability coefficient will affect the dissipation of negative pore pressure And pore water pressure transmission degree, and further affect the distribution of soil and water pressure on the support structure. According to the test results, when the soil permeability coefficient is small to a certain extent, the method of water and soil pressure cost-effective is reasonable.