Research on the displacement response ratio of groundwater dynamic augment and its application in evaluation of the slope stability

• Published in: Environmental earth sciences Vol. 74; no. 7; pp. 5773 - 5791
• Main Authors: Keqiang, He, Zhiliang, Wang, Xiaoyun, Ma, Zengtao, Lee
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2015; Springer Nature B.V
• Subjects: Biogeosciences; Canyons; Deformation; dynamic load; Earth and Environmental Science; Earth Sciences; Environmental Science and Engineering; Geochemistry; Geology; groundwater; Groundwater flow; Groundwater levels; hydrologic models; Hydrology/Water Resources; Landslides; Landslides & mudslides; monitoring; motivation; Original Article; prediction; Prediction models; Slope stability; Terrestrial Pollution; water table; China, People's Rep., Sichuan Prov., Changjiang R., Three Gorges Dam; Xintan landslide; Displacement response ratio; Groundwater dynamic augment; Evaluation of slope stability
• ISSN: 1866-6280; 1866-6299
• DOI: 10.1007/s12665-015-4595-0

On the basis of systematic analysis on the motivation and mechanism of displacement and destabilization of the water-induced landslides, this paper completes a study on the relationship between groundwater dynamic effect laws and displacement response characteristics in the process of the colluvial landslide stability evolution. It is found that the displacement and destabilization of landslide are directly controlled by the underground water level variation and also there exists one-to-one corresponding relation between the deformation of landslide and the groundwater level variation. On the basis of the results above, the underground water level increment and the corresponding deformation variation are taken to be as the dynamic load parameter of landslide and the dynamic incremental displacement response parameter, respectively. Then the displacement dynamic appraisal parameter and prediction model of the groundwater dynamic incremental displacement response ratio are determined in term of the basic principle of elastic–plastic mechanics in this paper. Meanwhile, taking the typical colluvial landslide in the Three Gorges Reservoir Area—Xintan landslide as an example, the values and changing rule of the groundwater dynamic incremental displacement response ratio parameter of the A₃ and B₃ monitoring points on this landslide are obtained by means of the groundwater dynamic incremental displacement response ratio prediction model, finding that the change rule of the dynamic incremental displacement response ratio-time curve is consistent basically with the dynamic stability evolutional law of the actual slope. The research results show that the groundwater dynamic incremental displacement response ratio prediction model can be used to forecast the kinetics of displacement for this slope, and this method has widely theory and extensive practicality.