Cohesion variation during instability evolution of disaster medium in mud inrush of mountain tunnel

Yang, Teng; Zhang, Qingsong; Zhang, Xiao; Li, Xianghui; Zhang, Jiaqi; Sun, Yuxue; Li, Zhuang

doi:10.1007/s11629-019-5651-0

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…Figure 10 shows that the value of the void ratio in cracked soil does not affect the value of the friction angle. This is appropriate with [13], which states that the main variable for cohesion derivatives is the void ratio; if cohesion is lost, the void ratio does not affect the friction angle. Therefore, the empirical correlation that can be made is the relationship between the liquid limit and the friction angle.…”

Section: High None Nonementioning

confidence: 99%

Physics and Shear Strength Parameter Correlation Using Modified Direct Shear in Cracked Soil

Irdiana

Mochtar

2022

Journal of Civil Engineering

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Cracked soil is a theory about the landslide due to cracks on the surface of the slope. Several studies about the shear parameters of cracked soil have been carried out. The latest research was about physical and shear strength parameters correlation of cracked soil upon soft to stiff consistency. The soil conditions in that research were less representative of the slope soil consistency that can be very stiff. Therefore, further research for medium to very stiff consistency was conducted. Cracked soil test specimens were tested using the modified direct shear test with the same total pressure and various water pressure. The results showed that water pressure had no significant effect on the cracked soil. Thus, the other cracked soil samples were tested using direct shear without water pressure in the crack to know the shear parameters correlation of the soil. In cracked soils, the cohesion was lost and friction angle was not affected by the void ratio of the soil. The empirical formula of cracked soil shear parameters correlation at medium to very stiff consistency were for LL < 50%; Ø = 22˚ and LL ≥ 50%, Ø = -0.0024 LL 2 + 0.2062 LL + 17.514.

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Section: High None Nonementioning

confidence: 99%

Physics and Shear Strength Parameter Correlation Using Modified Direct Shear in Cracked Soil

Irdiana

Mochtar

2022

Journal of Civil Engineering

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“…Liang et al [38] and Zhang et al [39] analyzed the changing rules of stress and displacement as well as the coupling effects of failure and leakage during tunnel excavation and divided the process of water and mud inrush into several stages. Yang et al [40] showed that the essence of water and mud inrush is that when the cohesion of soil decreases gradually with the increase of pore ratio, until the movement of soil particles cannot be restricted, the soil particles and groundwater form mud and flow out. Zhao and Zhang [41] carried out a series of experimental studies using a rotating viscometer and a simulation model.…”

Section: Introductionmentioning

confidence: 99%

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

et al. 2020

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When mountain tunnel passes through completely weathered granite strata, water and mud inrush is easy to occur, causing casualties and economic losses. Grouting is a common and effective treatment method for water and mud inrush disaster. The current existing researches focus on theoretical analysis, numerical simulation, and laboratory test, and the researches based on the field of engineering application are few. Based on the fully weathered granite tunnel of Junchang tunnel in Guangxi, this paper studies the grouting treatment of water and mud disaster in the fully weathered granite tunnel. This paper first introduces the geological and hydrological conditions of Junchang tunnel in order to understand the causes of water inrush and mud inrush. Then, the treatment method of full-section curtain grouting is introduced. During the grouting, the combination of exploration and injection is adopted. According to different hydrological conditions, different kinds of grouting materials are adopted. After grouting is completed, Transient Electromagnetic Methods, water inflow analysis, borehole investigation, and P-Q-T method are used to evaluate the grouting effect. According to the reaction of the detection results, the weak part of grouting can be supplemented to improve the grouting quality. The results show that the curtain grouting is effective for the treatment of water-mud inrush disaster in the fully weathered granite tunnel. This study provides a reference for the treatment of water and mud inrush in other similar tunnels.

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Analytical solution for steady seepage into a circular deep-buried mountain tunnel with grouted zone in anisotropic strata

et al. 2022

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Cohesion variation during instability evolution of disaster medium in mud inrush of mountain tunnel

Cited by 5 publications

References 18 publications

Physics and Shear Strength Parameter Correlation Using Modified Direct Shear in Cracked Soil

Physics and Shear Strength Parameter Correlation Using Modified Direct Shear in Cracked Soil

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

Analytical solution for steady seepage into a circular deep-buried mountain tunnel with grouted zone in anisotropic strata

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