粘时变Bingham流体在砂性地层中的渗透扩散机理研究与应用

Study on Permeation and Diffusion Mechanism of Viscous Time-varying Bingham Fluid in Sandy Formation

由于砂性地层存在大量的孔隙管道,管道孔径也并不相等,浆液的流变性除了与水灰比有关之外,还与外加剂、时间等有关,不能仅以初始粘度作为判断流变性的唯一指标,为使注浆材料扩散机理更加符合砂性地层实际扩散情况,对粘度时变性的宾汉姆流体在不均匀管组中的柱形扩散机理进行深入研究,并将此扩散机理应用至掺入工业废渣的新型注浆材料研究中,获得新型注浆材料在砂性地层中的理论扩散范围,为该注浆材料在实际工程中的应用提供参考。

Due to the existence of a large number of porous pipes in sandy strata,the diameters of the pipes are not equal,and the rheology of the grout is related not only to the water-cement ratio,but also to admixture and time,etc.Initial viscosity cannot be used as the only index to judge rheology.In order to make the diffusion mechanism of grouting materials more in line with the actual diffusion situation of sandy strata.In this paper,the cylindrical diffusion mechanism of Bingham fluid with viscosimetric time-varying in non-uniform tube sets is studied,and the diffusion mechanism is applied to the study of a new grouting material mixed with industrial waste slag.Finally,the theoretical diffusion range of the new grouting material in sandy stratum is obtained,which provides a reference for the application of this grouting material in practical engineering.