Impact of Crack on Stability of Slope with Linearly Increasing Undrained Strength

Li, Bing; Zhang, Fei; Wang, Di

doi:10.1155/2018/1096513

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…As shown in Figure 4, all the tilt sensors except sensor A are located in the unstable area which is bordered by a tension crack. The presence of the tension crack can also decrease the stability of a slope (Li et al 2018). Therefore, the slope movement at the Tachiyama area were monitored using this slope monitoring system.…”

Section: Monitoring Slope Movementmentioning

confidence: 99%

Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

Putra

Toda

Hafidz

et al. 2021

J Civil Struct Health Monit

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A simple monitoring method for observing slope movement and deformation can be performed with tilt sensors.A more efficient monitoring method, using a type of wireless communication called LPWA (Low Power Wide Area) network technology, has also recently become available. In the present study, a monitoring system was developed that combines tilt sensors and LPWA network technology for measuring the movement of slopes and sending the information through wireless communication. Firstly, radio wave propagation experiments were conducted to find the proper location for the gateway device of the monitoring system. Then, in March 2018, the developed system that consists of tilt and water-level sensors and the wireless communication of LPWA was installed at an observation site. Since the installation, the data from the tilt sensors have been successfully collected through LPWA, and a slope failure was unexpectedly observed at the observation site during the Heavy Rain Event of July 2018, which caused severe disasters, particularly from western Japan to the Tokai region. Using the data from the tilt sensors, the rainfall data, and the groundwater level, the slope failure was analysed. A site investigation was conducted, and the shear strength parameter was examined using back analysis method. In conclusion, the developed system using sensors and LPWA has continued to efficiently monitor the movement of the targeted slope, but the collection of additional data will be required to increase the reliability of the system.

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Section: Monitoring Slope Movementmentioning

confidence: 99%

Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

Putra

Toda

Hafidz

et al. 2021

J Civil Struct Health Monit

View full text Add to dashboard Cite

show abstract

“…Knowledge on the known depth of the crack, H 1 , brings in an additional equation about θ e , which can be obtained by combining equation (13) and the geometry in Figure 1(a) so that the following constraint is found:…”

Section: Definition and Formulation Of Problemmentioning

confidence: 99%

“…Baker [11] described the procedure of the limit equilibrium method with variational extremization for the evaluation of the effect of tensile cracks of the cohesive-frictional soil slope. After this, other researchers also developed the variational limit equilibrium methods to obtain the factor of safety for giving fissured slopes [12,13]. Another approach to analyzing the stability of fissured slopes is to use the upper bound theorem of limit analysis (LA).…”

Section: Introductionmentioning

confidence: 99%

Influence of Anisotropy and Nonhomogeneity on Stability Analysis of Fissured Slopes Subjected to Seismic Action

Liu

Zhang

Chen

et al. 2020

Mathematical Problems in Engineering

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Based on the upper bound theorem of limit analysis, this paper presents a procedure for assessment of the influence of the soil anisotropy and nonhomogeneity on the stability of fissured slopes subjected to seismic action. By means of a mathematical optimization procedure written in Matlab software codes, the stability factors NS and λcφ are derived with respect to the best upper bound solutions. A series of stability charts are obtained in this paper, and then the critical locations of cracks are determined for cracks of known depth. The results demonstrate a significant influence of the soil anisotropy and nonhomogeneity on the stability of the fissured slopes and the location distribution of the cracks. In addition, the procedures for getting the factor of safety are put forward. It is shown that a decrease in the nonhomogeneity coefficient n0 and an increase in the anisotropy coefficient k could lead to the fissured slopes becoming unsafe. Finally, this article also illustrates the variation in the safety factor of fissured slopes under the impact of three factors (Kh, H1/H, and λ).

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“…Baker [9] employed variational extremization for the assessment of the impact of the tensile crack of the cohesive soil slope. Since then, Leshchinsky [21] and Li et al [22] also extended this variational LE method to obtain the factor of safety for fissured slopes. Zhou et al [23] presented an extension of the variational analysis of slope stability with a tension crack considering seismicity.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Stability of Fissured Slopes Reinforced with Anchor Cables under Seismic Action

Zhang

Jiang

et al. 2021

Mathematical Problems in Engineering

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Based on the upper bound theorem of limit analysis (UBLA) combined with the pseudostatic methods, this paper elaborates on a calculated procedure for evaluating fissured slope stability under seismic conditions reinforced with prestressed anchor cables. An existing simple slope case is presented as a case study in this work. The comparison is given to verify that the solution derived from this study is correct and feasible. By means of a numerical optimization procedure, the critical location of the crack is determined from the best upper bound solutions. The results demonstrate a significant influence of the depth of crack and seismic acceleration coefficient on the critical location distribution of the cracks. Meanwhile, the axial force of anchor cables is investigated via parametric studies. It is shown that the variation of the crack depth has little effect on the axial force of anchor cables. Moreover, this paper also illustrates the variation in the axial force of anchor cables under the impact of five marked factors (crack depth, anchor arrangement, anchor inclination angle, slope angle, and seismic conditions). Finally, the required critical length of the free section of anchor cables is determined to ensure the stability of fissured slopes subjected to seismic action.

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Impact of Crack on Stability of Slope with Linearly Increasing Undrained Strength

Cited by 6 publications

References 27 publications

Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

Influence of Anisotropy and Nonhomogeneity on Stability Analysis of Fissured Slopes Subjected to Seismic Action

Investigation on the Stability of Fissured Slopes Reinforced with Anchor Cables under Seismic Action

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