支挡结构上的水土压力特性试验研究

发布时间：2018-08-05 19:20

【摘要】：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。
[Abstract]:In view of the fact that the influence of soil properties on soil and water pressure is seldom considered in the calculation of soil and water pressure at present, the soil and water pressure on retaining structure with three kinds of permeable soil samples is tested and studied by using self-made test tank as the research tool. The variation of pore water pressure and soil pressure is analyzed by comparing the measured values of soil and water pressure with the theoretical values obtained from the calculation of soil and water pressure and the calculation of soil and water pressure. It can be obtained from the test results that the results obtained from the calculation of soil and water pressure are small, but acceptable under certain conditions. When the active displacement occurs, the soil behind the wall will produce negative excess pore pressure. The permeability coefficient affects the dissipation of negative superpore pressure and the transfer of pore water pressure, and further influences the distribution of soil and water pressure on the retaining structure. It is inferred from the test results that when the soil permeability coefficient is small to a certain extent, the method of water and soil pressure is reasonable.
【作者单位】：湖南大学岩土工程研究所;
【分类号】：TU432

【参考文献】