A Simplified Solution for Calculating the Phreatic Line and Slope Stability during a Sudden Drawdown of the Reservoir Water Level

Sun, Guanhua; Lin, Shan; Jiang, Wei; Yang, Yongtao

doi:10.1155/2018/1859285

Cited by 11 publications

(3 citation statements)

References 26 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This solution comprehensively incorporated the combined effect of reservoir water level fluctuation and rainfall. Subsequently, an analysis of the analytical solution of the phreatic line was carried out under the combined effect of rainfall and a constant velocity change of the reservoir water level [38][39][40]. Despite the extensive efforts invested by numerous scholars in the analytical investigation of the landslide phreatic line under the joint influence of rainfall and reservoir water level fluctuation, the prevailing models still have the following limitations.…”

Section: Introductionmentioning

confidence: 99%

Phreatic Line Calculation of Reservoir Landslide under Complex Hydraulic Conditions—A Case Study

Zhang,

Ma,

Yuan

et al. 2024

Water

View full text Add to dashboard Cite

A seepage field, influenced by rainfall and reservoir water level fluctuation, is closely associated with the stability of the reservoir landslide. Understanding the phreatic line variation inside the landslide is of significant importance for the analysis and evaluation of slope stability. Currently, most of the boundaries of phreatic line analytical models and the hydrological conditions are simplified, resulting in discrepancies between the outcomes derived from these models and the actual situation. Given this, the newly proposed analytical model is refined by addressing the following two issues. Firstly, the consideration of variable-speed reservoir level fluctuations is incorporated, and secondly, the reservoir bank within the water-level fluctuation zone is treated as non-vertical. Under the combined effect of reservoir water level fluctuation and rainfall, the Boussinesq Differential Equation of unsteady seepage is established and applied to the Majiagou landslide in Three Gorges reservoir area. The results of the analytical solution are basically consistent with the measured groundwater level results, which has demonstrated the accuracy of the proposed model. Consequently, the proposed model can quickly and accurately calculate the groundwater level of landslides, which provides an effective means for the prediction and early warning of reservoir landslides.

show abstract

Section: Introductionmentioning

confidence: 99%

Phreatic Line Calculation of Reservoir Landslide under Complex Hydraulic Conditions—A Case Study

Zhang,

Ma,

Yuan

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

“…Accurate determination of the unknown phreatic line is regarded as one of the most important considerations for affecting the safety of an embankment dam or weirs, since failure of the earth-filled structure occurs because of piping and internal erosion mainly from seepage [1]. The determination of the phreatic line in seepage flow is a nonlinear problem which needs to find the location of the movable surface from the nonlinear boundary conditions [2]. The free surface problems can be solved using mesh-based methods with an adaptive mesh [3][4][5][6] or a fixed mesh [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Method of Fundamental Solutions for Three-Dimensional Nonlinear Free Surface Flows Using the Iterative Scheme

Xiao

Liu

2019

Applied Sciences

View full text Add to dashboard Cite

In this article, we present a meshless method based on the method of fundamental solutions (MFS) capable of solving free surface flow in three dimensions. Since the basis function of the MFS satisfies the governing equation, the advantage of the MFS is that only the problem boundary needs to be placed in the collocation points. For solving the three-dimensional free surface with nonlinear boundary conditions, the relaxation method in conjunction with the MFS is used, in which the three-dimensional free surface is iterated as a movable boundary until the nonlinear boundary conditions are satisfied. The proposed method is verified and application examples are conducted. Comparing results with those from other methods shows that the method is robust and provides high accuracy and reliability. The effectiveness and ease of use for solving nonlinear free surface flows in three dimensions are also revealed.

show abstract

“…A dump is a special engineered rock-soil mass consisting of discarded mixed soil and rock from quarries and created through stacking the materials. The spatial distribution of the dump, slope of the surface, height of slope sediments, strength of mixed materials, depth of slope water, and other factors all affect the stability of the dump slope [4][5][6][7][8][9][10][11]. The main disaster that affects dumps is landslides, and the key for preventing landslides is to control the slope stability of the dump.…”

Section: Introductionmentioning

confidence: 99%

Research on Stability of an Open-Pit Mine Dump with Fiber Optic Monitoring

et al. 2018

View full text Add to dashboard Cite

China has over 1500 open-pit mines and 5000 dumps consisting of waste rock from the mining process. Due to dump instability in an open-pit mine and its diverse foundations, landslides and mudslides frequently occur. Heaped loose waste rock and concentrated heavy rainfalls are the two important factors affecting slope stability of a dump. Using the high Dump II within the Nanfen Open-Pit Iron Mine with a slope height of 300 m as a case study, this paper first proposes a physical model similarity ratio according to the on-site engineering geological survey data. The governing principles of deformation in the shallow dump layers in terms of different heaped loads and rainfall were then determined using fiber optic sensing to conduct an experimental study on the monitoring of the dump stability with an indoor physical model. Experimental results confirm that the amount of rainfall and heaped load has a great impact on the landslide in a dump. With an increase in the amount of material heaped onto the pile, the place between two heaped load points is squeezed and slowly deformed. As rainfall begins, the deformation of the rock-soil mass is significant, and constantly increasing rainfall intensity is accompanied by a dangerous sliding surface. Finally, the FLAC3D method was used to simulate the deformation features in the shallow part of Dump II under different heaped load conditions and verify the experimental results of the indoor physical model. By comparing the physical model experiments and numerical simulation results, we propose monitoring the stability of Dump II using this fiber optic sensing technology and provide the scientific basis for stability monitoring of similar dumps to detect the early warning signs of mudslides or landslides.

show abstract

A Simplified Solution for Calculating the Phreatic Line and Slope Stability during a Sudden Drawdown of the Reservoir Water Level

Cited by 11 publications

References 26 publications

Phreatic Line Calculation of Reservoir Landslide under Complex Hydraulic Conditions—A Case Study

Phreatic Line Calculation of Reservoir Landslide under Complex Hydraulic Conditions—A Case Study

The Method of Fundamental Solutions for Three-Dimensional Nonlinear Free Surface Flows Using the Iterative Scheme

Research on Stability of an Open-Pit Mine Dump with Fiber Optic Monitoring

Contact Info

Product

Resources

About