岩土工程磁力模型利用电磁力场来模拟重力场进行岩土工程问题的研究,模型中模型尺寸缩小n倍,重力加速度增加n倍,材料的容重、粘聚力、内摩擦角、弹性模量和泊松比等力学参数均可采用原型参数。基于正交实验设计方法研制了一种可用于磁力模型的磁敏性土体相似材料,材料选用石英砂为骨料,膨润土和双飞粉为胶结料,铁氧体为掺料。实验表明,新材料的容重为19～25kN/m2;粘聚力为0～54kPa,内摩擦角7～31°,可在地质力学与岩土工程磁力模型实验中模拟范围较广的土体材料。对相似材料进行力学实验,研究了磁粉含量与材料力学指标的变化关系。
GEO-magnetic model used electromagnetic force field to simulate gravity field to research geotechnical engineering problems. In the models, the acceleration of gravity was amplified with n times, and the geometric dimension were reduced with n times, and other physical parameters like density, cohesion, internal friction an- gle, compressive modulus and Poisson's ratio can using prototype parameters. Based on orthogonal test design method, a new magnetic sensing soil similar material was developed which can be used for GEO-magnetic model test, the materials select quartz sand as main materials, Bentonite and calcium carbonate as glue, ferrite powder as regulator. The new materials had similar level properties with soil, that was, bulk density 19-25kN/m2 , co- hesion 0-54kPa,internal friction angle 7-31°, which can simulation a wide range of soil materials in the field of geotechnical engineering. The relationship between magnetic powder content and the mechanical parameters of materials were studied.
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