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扁铲侧胀试验中贯入过程会对土体产生扰动,采用在Drucker-Prager模型基础上修正的双线性弹性各向同性模型,对扁铲贯入引起的土体变化进行了有限元分析.结果表明:(1)贯入后扁铲测头梢端尖部土体发生受拉破坏,扁铲梢尖端转折处土体发生受压破坏,铲尖斜面上土体被剪拉破坏;(2)扁铲侧胀试验贯入过程引起的水平扰动范围在距离扁铲测头35 cm左右.
In the flat dilatometer test, the penetration process will disturb the soil. Based on the bilinear elastic isotropic model modified on the basis of Drucker-Prager model, finite element analysis The results show that: (1) The soil at the tip of the flat shovel probe suffered tensile failure after penetrating, the soil at the tip of flat shovel tip was damaged by compression and the soil at the tip - 2) The horizontal disturbance caused by the flat shovel test penetration process is about 35 cm away from the flat shovel probe.