Numerical Simulation on the Seepage Properties of Soil‐Rock Mixture

Zhao, Ning; Wang, Yingchao; Meng, Bo; Luo, Ning

doi:10.1155/2018/1859319

Cited by 15 publications

(8 citation statements)

References 31 publications

(33 reference statements)

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“…e rock with large size in soil-rock mixture and its engineering properties are between ordinary rock and soil [6,9], and its compaction characteristics and mechanical characteristics determine the safety and stability of pavement [8,9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Yan¹,

Zhan²,

Hu³

et al. 2021

Advances in Materials Science and Engineering

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Soil-rock mixture is a common filling material for earth dam and subgrade. In this study, research concerned on the evolution law of engineering characteristics of soil-rock mixture under different factors and the effect of defect on subgrade strength, and geotechnical tests were carried out to analyze the influence of different factors on engineering characteristics of soil-rock mixture in the study, and the physical model was carried out to analyze the effect of different compaction works on the resilient modulus, and the influence of defect on the strength was explored by manually preset loose body. The test results showed that (1) when the soil-rock mixture was graded, P = 78, the moisture content was 14%, and the engineering characteristics were optimal; (2) there was a positive correlation between compaction times and resilient modulus, and the stress transferred from the subgrade to soil was linearly distributed under the good condition of compactness; and (3) the existence of loose body not only reduces the modulus of resilience but also affects the stress transfer; the larger the loose body, the lower the resilient modulus and the greater the stress transfer.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Yan¹,

Zhan²,

Hu³

et al. 2021

Advances in Materials Science and Engineering

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“…At present, a large number of studies have been conducted on the streaming potential coupling coefficient model of pure rock and soil. SRM as filling material of embankment dam and the seepage characteristics of SRM are mainly affected by structural factors such as rock content, compactness, particle shape, and grading curve [4][5][6]; that means the model of streaming potential coupling coefficient of SRM is different from that of rock and soil. Therefore, the existing streaming potential coupling coefficient model cannot describe the structural characteristics of the SRM.…”

Section: Introductionmentioning

confidence: 99%

A New Modified Model of the Streaming Potential Coupling Coefficient Depends on Structural Parameters of Soil-Rock Mixture

2021

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The streaming potential effect in soil-rock mixture (SRM) is related to the compactness and rock content, but there is no model to quantitatively describe this behavior. In this paper, the Kozeny–Carman (KC) equation is modified by using the compactness and rock content. Then, the modified KC equation is substituted into the equation of streaming potential coupling coefficient. A new modified model of streaming potential coupling coefficient that depends on the compactness, rock content, particle shape, and particle gradation is proposed. The reliability of the new modified model is tested by experiments, and the applicable scope of the model is obtained. The results show that when the rock content is 30%, the permeability coefficient prediction accuracy of the modified KC equation is higher in the range of 85–95% compactness. The new modified model of the streaming potential coupling coefficient represents well the control of the compactness (75–95%) on the coupling coefficient. When the compactness remains 85%, the permeability coefficient calculated by the modified KC equation in the range of 10–70% rock content is consistent with the experimental data. The influence of the rock content (10–90%) on the coupling coefficient is well described by the new modified model of the streaming potential coupling coefficient. The new modified model of streaming potential coupling coefficient is helpful to quantitatively evaluate the internal structure evolution of embankment dam by using streaming potential phenomenon.

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“…As a complementary research method, numerical simulation can be divided into two categories: finite element methods and discrete element methods. Many software such as PFC (Wang et al 2019e), FLUENT (Zhao et al 2018;Wu et al 2019b), andFLAC 3D (Pan et al 2019), have been widely used. During the experiment, the multifield information fusion technology was also used to summarize the evolution of water inrush (Zhang et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Study on the seepage characteristics of deep buried tunnels under variable high-pressure water heads

Wang

Jing

et al. 2020

Bull Eng Geol Environ

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Well-connected seepage channels are the key components of tunnel water inrush. To study the trends of the pore water pressure in the rock mass in a seepage channel, the physical experiment and corresponding numerical model were established. First, in the seepage experiment under excavation disturbance, the propagation rate of the high-pressure water source and the growth rate of the pore water pressure in the rock mass were analyzed by considering the different water pressures. Second, under the same model size, parameters, and working conditions, the finite element method was used to simulate the seepage process of water in the rock mass. From the microlevel, the evolution process of the pore water pressure isosurface was obtained. The results showed that the pressure water head is positively correlated with the pore water pressure in the rock mass, which displays multiple approximate relationships. Moreover, when the water pressure is high, excavation disturbance can significantly increase the pore water pressure in the rock mass. The disturbance caused by the first excavation is larger than the subsequent excavations. In addition, the research results were compared with previous results. Reasonable agreements that would provide a reference for the conditions of high water-pressure disasters in deep buried tunnel construction were obtained.

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Numerical Simulation on the Seepage Properties of Soil‐Rock Mixture

Cited by 15 publications

References 31 publications

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

A New Modified Model of the Streaming Potential Coupling Coefficient Depends on Structural Parameters of Soil-Rock Mixture

Study on the seepage characteristics of deep buried tunnels under variable high-pressure water heads

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