手法を比較

	テルツァギの圧密	MODFLOW groundwater modeling	斜面の安定性（ビショップ・ヤンブ法）
分野	土木工学	土木工学	土木工学
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1943	1984 (original release); continuously updated through MODFLOW-6 (2017)	1955
提唱者	Karl Terzaghi	Michael G. McDonald and Arlen W. Harbaugh (U.S. Geological Survey)	Alan Bishop and Nilmar Janbu
種類	Diffusion equation for pore pressure dissipation and soil settlement	Numerical groundwater flow simulation	Limit equilibrium method for slope failure analysis
原典	Terzaghi, K. (1943). Theoretical Soil Mechanics. John Wiley & Sons. ISBN: 0-471-85305-1	Harbaugh, A. W. (2005). MODFLOW-2005, the U.S. Geological Survey modular ground-water model — the Ground-Water Flow Process. U.S. Geological Survey Techniques and Methods 6-A16.	Bishop, A. W. (1955). The use of the slip circle in the stability analysis of slopes. Geotechnique, 5(1), 7-17.
別名	Primary consolidation, Soil settlement, Effective stress	MODFLOW-2005, MODFLOW-6, modular groundwater flow model, USGS groundwater model	Circular slip surface, Limit equilibrium, Factor of safety
関連	3	0	3
概要	Terzaghi consolidation theory describes how water-saturated clay soils compress over time as excess pore water pressure dissipates and effective stress increases. Formulated by Karl Terzaghi in 1943, this foundational theory enables prediction of settlement rates for foundations on compressible soils, a critical design concern in geotechnical engineering.	MODFLOW is the U.S. Geological Survey's open-source, modular finite-difference model for simulating three-dimensional groundwater flow through porous media. First released in 1984 and continuously updated — most recently as MODFLOW-6 — it is the global standard for quantitative hydrogeological analysis, widely used in civil engineering, environmental consulting, water-resource management, and groundwater contamination studies.	The Bishop and Janbu methods are limit equilibrium approaches for analyzing slope stability, computing the factor of safety against shear failure along a potential slip surface. Developed by Bishop (1955) and Janbu (1954), these methods remain the most widely used tools in geotechnical engineering for evaluating cut slopes, embankments, and natural hillsides.