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为研究温度因素对膨胀土裂隙发展的影响,以宜昌某地膨胀土为例,利用称重拍照系统和Matlab编写图像处理程序,进行了100、75、50℃三种环境下的湿干循环试验。结果表明,除试样的水分蒸发量之外,蒸发速度和含水率梯度也是影响裂隙发展的关键因素;试样表层蒸发速度比里层蒸发速度快,温度越高,裂隙发展的就越快,试样被裂隙切割的越破碎;在不同的温度环境下,裂隙率的差异会随着循环次数的增加而增加。研究结果为膨胀土边坡稳定性研究提供了依据。
In order to study the influence of temperature on the development of expansive soil fissures, taking the expansive soil in Yichang as an example, the image processing program was prepared by using the weighing and photographing system and Matlab, and the wet-dry cycle test under three environments of 100, 75 and 50 ℃ . The results show that in addition to the amount of water evaporation, the evaporation rate and water content gradient are also the key factors affecting the fracture development. The surface evaporation rate of the sample is faster than the evaporation rate of the inner layer. The higher the temperature, the faster the fracture development, The more fractured the specimen, the more the fracture rate increases with the number of cycles. The results provide the basis for the stability of expansive soil slope.