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膨胀土的裂隙性给工程带来了极大的危害,为了解膨胀土的裂隙发育规律,本文对南阳膨胀土做了大量室内试验,制备各种不同的重塑土样,在不同环境下进行脱湿,观测脱湿过程中土样裂隙发育过程,分别研究试样的均匀性对裂隙发育的影响、裂隙发育的温度敏感性、裂隙发育的尺寸效应,得出以下结论:试样愈均匀裂隙发育曲线愈平滑,温度对膨胀土裂隙发育形态有明显影响,不同尺寸试样裂隙发育有所不同,具有明显的尺寸效应,试样愈小表面愈难出现裂隙而主要表现为土的收缩。
The fissure of expansive soil has brought great harm to the project. In order to understand the law of fissure development of expansive soil, a large number of laboratory tests have been done on the expansive soils of Nanyang so as to prepare various remodeled soil samples under different environments Dehumidification and observing the process of soil sample crack development in the process of desorption were studied. The influence of sample homogeneity on the fracture development, the temperature sensitivity of fracture development and the size effect of fracture development were studied. The following conclusions were obtained: The smoother the development curve is, the more obvious the influence of temperature is on the development of fractures in expansive soil. The fractures of different sizes have different development and obvious size effect.