A Mechanics-Based Procedure for Predicting Groundwater-Rise-Induced Slope Displacements
Journal Title: Open Access Journal of Environmental and Soil Sciences - Year 2018, Vol 1, Issue 4
Abstract
A procedure for predicting cumulative slope displacements induced by groundwater table changes is proposed. The proposed procedure incorporates a back-calculation technique for the soil strength parameter based on the records of slope displacement and ground water table changes. The analytical tool for the back-calculation is a limit-equilibrium-based finite displacement method (FFDM) requiring force and moment equilibrium, displacement compatibility, and a hyperbolic shear stress-displacement constitutive law. The analyzed potential sliding mass is a statically determinate system, providing a closed-form solution for the displacement of the slope. Two well documented case histories of periodic rainfall-induced slope displacements are used to validate the proposed analytical procedures. The hyperbolic soil strength parameters back-calculated from the first event of slope displacement can be used as operational soil strength parameters for predicting subsequent slope displacements caused by rainfall-induced groundwater table elevation changes. The proposed method alleviates possible difficulties associated with the evaluation of soil strength using undisturbed soil sampling of colluviums in foothill areas. The proposed method requires little computer time in deriving useful information of slope displacement which cannot be achieved using conventional limit equilibrium methods or advanced numerical analyses. The proposed analytical procedure is valid only for simulating instantaneous sliding where time-dependent viscous (or creep) deformation is not dominant. A substantial part of the infrastructure damage and remediation budget is used to fix damage caused by slope failures [1,2]. Therefore, analyses for slope failure potential in response to environmental changes, such as intensive rainfall, seismic activities [3] or groundwater level changes [4] is necessary for facilitating maintenance and disaster mitigation programs. Various analytical methods have been developed for slope stability evaluations. In the study of important and large-scale infrastructure such as dams or metropolitan shield tunnels where failures are lifethreatening, sophisticated numerical methods, such as the finite element method (FEM) and the finite difference method (FDM), are desirable [5]. In such cases, sufficient budgets for intensive ground explorations, computer analysis, and skillful computational engineers are needed. In reality, studies on slope stability are frequently time- and budget-limited, and a numerically accurate (or sophisticated) computer analysis often makes numerous assumptions regarding the underground geological or geo environmental conditions. A complete numerical analysis with totally known material properties and underground environmental conditions is rare.
Authors and Affiliations
Ching-Chun Huang
Keywords
Related Articles
- EP ID EP570988
- DOI 10.32474/OAJESS.2018.01.000117
- Views 86
- Downloads 0
Change of Evaporations Leads to Climate Change
The basis of all floods and droughts is water, its excess in some places and lack of it in others. Both here and there the biota dies. Water is the main mediator, means and condition for the existence of life on the plan...
Intellectual Irrigation Management in Mining Frozen Farming in Azerbaijan
This article examines the current state of soil and water resources, farmland t.ch.i Azerbaijan Republic , the problem of progressive water and wind soil degradation , the need for the organization of agriculture , takin...
Panduan Penternakan Burung Puyuh (Malay Version)
Written by Jabatan Perkhidmatan Veterinar Negeri Selangor, this book is about the guide to farming quail. In Malaysia, quail and quail eggs have begun to be known since the 1960s, but the development of this industry is...
Some Aspects of Red Special Wines
Due to increasing environmental radionuclide background, the scientists and specialists constantly face the problem of developing technologies for producing plant-based, therapeutic-purpose foods and food supplements enr...
Water, Electric Energy and Flood
Ways of water conservation in rivers are based on the creation of bulky dams with flooding of large areas and the creation of hydroelectric power plants (HPP). Man-made reservoirs are built on all residential continents,...