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采用微机控制万能材料试验机,通过轴向压缩、侧向约束的实验方式,以不同水泥砂配比样品作为充填介质,分别研究了同配比和同隙宽条件下的非全充填裂隙的变形模量。实验结果表明:在充填裂隙变形初期充填介质形态开始发生变化,随着应力的增大充填介质进入孔隙,最后直至组织密实,造成变形模量动态变化的特点;变形模量随应力的增大而增大;配制比例1∶2的充填裂隙的变形模量较大,且配制比例1∶2、1∶4、1∶6、1∶8的充填裂隙的变形模量呈现依次减小的趋势;同配置比充填裂隙的变形模量随应力的增大而增大,相同配制比例,不同充填裂隙宽度下,充填裂隙隙宽越大,充填裂隙的变形模量就越小。
By computer controlled universal material testing machine, through axial compression and lateral restraint experiment, different cement sand proportioning samples are used as filling media, and the deformations of non-full filling cracks under the same mixing ratio and same width of gap are studied respectively Modulus. The experimental results show that the shape of the filling medium begins to change at the initial stage of the deformation of the filling fissure, and the filling medium enters the pores as the stress increases, and finally the structure becomes dense, resulting in the dynamic change of the deformation modulus. The deformation modulus increases with the increase of the stress The deformation modulus of the filling fissure with the ratio of 1: 2 is larger, and the deformation modulus of the filling fissures with the ratio of 1: 2, 1: 4, 1: 6 and 1: 8 tends to decrease in turn; The deformation modulus of the fissures with the same configuration increases with the increase of the stress. The same proportion of the fissures, the larger the fissure gap and the smaller the deformation modulus are.