Abstract
Grouting mechanism is one of the important factors on the grouting effects of practical projects. At present, the vast majority of Newton fluid penetration grouting mechanisms are considering that the viscosity of Newton fluid during the grouting whole process was constant, so the theoretical diffusion radius calculated by them is far greater than the actual measurements in the grouting engineering. Carrying out theoretical analysis and experimental research, the rheological equation and seepage motion equation for Newton fluid of time-dependent behavior of rheological parameters were established; then, the penetration grouting mechanism of them was deduced. What is more, they were validated by means of designing the grouting verifying experiments. Experiment results show that the theoretical diffusion radius calculated by the formula of diffusion radius of penetration grouting mechanism based on Newton fluid of time-dependent behavior of rheological parameters was in accordance with the change regulation of the actual measurement diffusion radius by grouting experiments. Their difference within the range of 15% is far less than about 80% change between the theoretical diffusion radius calculated by the Maag formula and the actual measurement radius. In general, it can reflect the grout infiltration laws that Newton fluid changes with time. Therefore, research achievements may not only be able to provide a strong theoretical basis for perfecting the penetration grouting mechanism but also play a reference guiding role for the theoretical research, design, and construction in the grouting technique.
Highlights
Grouting, as a widely used geotechnical reinforcement and water shutoff technology, has been used in practical engineering fields involving buildings, highways, subways, mines, tunnels, hydropower services, military applications, railways, and stratum treatments [1]
Abundant research achievements have been made with respect to the penetration grouting mechanism based on Newton fluid, which are widely used in practical grouting engineering, such as Maag spherical theory, sleeve valve, and cylinder diffusion models [1]
Jiacai [4] studied the formula for maximum diffusion radius of Newton fluid in the fracture surface; Baker [5] deduced the calculation formula for maximum diffusion radius of Newton fluid in the rock mass fracture; Jinfeng et al [6] explored the diffusion law of Newton fluid in the plane, radial, and circular fracture; Lie
Summary
As a widely used geotechnical reinforcement and water shutoff technology, has been used in practical engineering fields involving buildings, highways, subways, mines, tunnels, hydropower services, military applications, railways, and stratum treatments [1]. The penetration grouting mechanism based on Newton fluid of time-dependent behavior of rheological parameters is studied in this paper to provide theoretical support for actual grouting construction. According to [13,14,15,16], the following assumptions are adopted in this paper while studying the penetration grouting mechanism based on Newton fluid of time-dependent behavior of rheological parameters:. E spherically theoretical diffusion radius of Newton fluid of time-dependent behavior of rheological parameters in the grouted medium can be obtained by formula (19):
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