Damage evolution mechanism of rock-soil mass of bedrock and overburden layer slopes based on shaking table test

Tong, Xin-hao; Lian, Jing; Zhang, Liang

doi:10.1007/s11629-022-7403-9

Cited by 18 publications

(7 citation statements)

References 39 publications

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“…In order to study the compaction state and acceleration propagation law of the filling soil under different vibration parameters of the roller, we designed tests under different parameters in the working process of vibratory rollers and used one round as a compaction test to obtain the acceleration time-history curve under different working conditions. For acceleration time-course data, the method of processing the data is quite important [ 28 , 29 ]. The sampling frequency is the number of test data collected by the acceleration sensor per second.…”

Section: Test Results and Analysismentioning

confidence: 99%

Wave Propagation Characteristics and Compaction Status of Subgrade during Vibratory Compaction

Yao

Mao

et al. 2023

Sensors

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Vibratory compaction status has a significant influence on the construction quality of subgrade engineering. This study carried out field experiments to study the propagation characteristics of the vertical vibration wave in the soil field along the traveling direction of the vibratory roller. The propagation coefficients of the peak acceleration at different positions and compacting rounds are compared in both the time and frequency domains. The compaction status is estimated in the form of dynamic modulus of deformation (Evd) obtained by plate load tests. The experiment results show that the propagation coefficient of peak acceleration is affected by the traveling speed, excitation amplitude, and frequency of the vibratory roller, as well as the compacting rounds. An exponential relationship between the wave amplitudes of the fundamental mode and higher-order modes is revealed. The amplitude of the fundamental wave is maximum at the speed of 3 km/h, whereas the amplitudes of higher-order waves have a maximum of 1.5 km/h. The influences of compaction rounds on the average value of Evd are also investigated to provide a practical reference for engineering construction.

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Section: Test Results and Analysismentioning

confidence: 99%

Wave Propagation Characteristics and Compaction Status of Subgrade during Vibratory Compaction

Yao

Mao

et al. 2023

Sensors

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“…Meanwhile, some natural products such as curcumin and resveratrol have shown better effectiveness and safety in improving NAFLD [ 26 ]. Ginsenosides have been reported as natural products in the treatment of NAFLD [ 27 ] as well as hepatocellular carcinoma [ 28 ]. Other researchers have indicated that ginsenoside Rh4 had significant effects on the treatment of colon cancer and the improvement of the intestinal tract and metabolic products [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Ginsenoside Rh4 Improves Hepatic Lipid Metabolism and Inflammation in a Model of NAFLD by Targeting the Gut Liver Axis and Modulating the FXR Signaling Pathway

Yang

Duan

Zhang

et al. 2023

Foods

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Non-alcoholic fatty liver disease (NAFLD) is a series of disorders of liver metabolism caused by the accumulation of lipids in the liver, which is considered the main cause of hepatocellular carcinoma. Our previous study demonstrated the promising efficacy of ginsenoside Rh4 in improving the intestinal tract and its related metabolites. Meanwhile, many studies in the literature have investigated the gut microbiota and its metabolites, such as bile acids (BAs) and short-chain fatty acids (SCFAs), which play a key role in the pathogenesis of NAFLD. Therefore, this study focused on whether Rh4 could achieve therapeutic effects on NAFLD through the gut–liver axis. The results showed that Rh4 exhibited sound therapeutic effects on the NAFLD model induced by the Western diet and CCl4 in mice. In the liver, the degrees of hepatic steatosis, lobular inflammation levels, and bile acid in the liver tissue were improved after Rh4 treatment. At the same time, Rh4 treatment significantly increased the levels of intestinal SCFAs and BAs, and these changes were accompanied by the complementary diversity and composition of intestinal flora. In addition, correlation analysis showed that Rh4 affected the expression of proteins involved in the farnesoid X receptor (FXR) signaling pathway in the liver and intestine, which modulates hepatic lipid metabolism, inflammation, and proteins related to bile acid regulation. In conclusion, our study provides a valuable insight into how Rh4 targets the gut–liver axis for the development of NAFLD, which indicates that Rh4 may be a promising candidate for the clinical therapy of NAFLD.

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Section: Methodsmentioning

confidence: 99%

“…In this study, the macroscopic qualitative analysis was processed by the geological exploration method [28,29], the slope stability and the sliding thrust were quantitatively analyzed by the limit equilibrium method, and the sensitivity analysis was calculated and conducted on its shear strength parameters by laboratory tests and a field large shear test. Based on the actual situation of an unstable slope, the transfer coefficient method [30,31] in the limit equilibrium analysis method [32,33] was used to analyze and calculate the stability of five engineering geological profiles of an unstable slope (Figure 3), numbered as Model 1 to Model 5, to select the third, fourth, and fifth profiles for the stability analysis and calculation of the first level steep slope below the slope, numbered as Model 6 to Model 8 (Figure 4). The exploration methods adopted in this survey were surface survey, surveying, drilling, well exploration, trough exploration, pit seepage test, the field shear test, and laboratory sample test, and the exploration means met the relevant provisions of the technical requirements of this survey.…”

Section: Methodsmentioning

confidence: 99%

Stability Analysis of an Unstable Slope in Chongqing Based on Multiple Analysis Methods

Li¹,

Hu³

et al. 2023

Processes

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The failure of an unstable slope has the characteristics of sudden disaster, rapid sliding speed, and a wide range of influence. This study selected an unstable slope in Chongqing as the evaluation object, divided it into the strong-deformation zone and weak-deformation zone, and analyzed its formation mechanism and deformation failure mode. Macroscopic qualitative analysis was processed by the geological exploration method, the slope stability and the sliding thrust were quantitatively analyzed by the limit equilibrium method, and the sensitivity analysis was calculated and conducted on its shear strength parameters by laboratory tests and a field large shear test. The historical formation process of the slope was deduced, and suggestions for the prevention and control of unstable slopes were proposed. Studies show that the deformation mechanism of an unstable slope is a push type, its deformation is mainly concentrated in the southern area of the rear edge, and the width of the slope ground tensile crack is 1~30 cm, with a visible depth of 3~30 mm and an extension of 3~12 m. The shear strength of potential sliding zone soil in the weak-deformation zone is: cpw = 35.70 kPa, φpw = 14.80°, and in the strong-deformation zone it is: cps = 32.54 kPa, φps = 13.54°. The results show that the formation of a steep cliff by the artificial mining of sandstone is the main cause of slope deformation, the action of groundwater is the main triggering factor for slope deformation, and the inclined rock mass at the front edge is the key block for the deformation. The strong-deformation zone of the slope is in an unstable state under rainstorm, and the weak-deformation zone of the slope is basically-stable under rainstorm. Unstable slopes are prone to slide during a rainstorm period, which threatens the lives and properties of the residents and road traffic safety around the slope. The research results provide an important theoretical basis and data support for the accurate judgment and stability analysis of instability failure modes and for the further effective prevention and control of unstable slopes.

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Damage evolution mechanism of rock-soil mass of bedrock and overburden layer slopes based on shaking table test

Cited by 18 publications

References 39 publications

Wave Propagation Characteristics and Compaction Status of Subgrade during Vibratory Compaction

Wave Propagation Characteristics and Compaction Status of Subgrade during Vibratory Compaction

Ginsenoside Rh4 Improves Hepatic Lipid Metabolism and Inflammation in a Model of NAFLD by Targeting the Gut Liver Axis and Modulating the FXR Signaling Pathway

Stability Analysis of an Unstable Slope in Chongqing Based on Multiple Analysis Methods

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