The Influence of the Slpoe Stability with Crack Position

• Main Authors: Chi-Li LIN, 林繼立
• Other Authors: Te-Hsing Chang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/94nejg

碩士 === 中原大學 === 土木工程研究所 === 93 === When the soil with cracks in unsaturated slopes affected by rainfall, except that some rainfall becomes the surface runoff, other rainwater will be permeated with the crack under the surface. Because water infiltration besides making the water table rise, also increase the soil-water pressure, increase the glide stress of the soil, and decrease the anti-shear strength of soil, make slope becomes failure and deformation, even make it failure by slip. Generally the analyzed of slope steadily often neglects the influence of the crack, rainfall infiltration. We always let the soil body physical property as definite value in order to analyze its stability, and not considered that the change of crack, water content will influence the anti-shear strength of soil on time’s changing. So we can’t actually know when the collapse will happen by our slope stability analysis, so the analysis of slope depending yet not enough complete at present. This research will combine the method of rainfall, infiltration and slope stability analysis, and consider the slope crack in different position , applies FEMWATER software in simulating the soil moisture content after a rainfall depending on time’s changing, and the increase and decrease of groundwater. Next, there are different soil parameters in different moisture content. Then, it applies the mode of STEDWIN software to count each stage the relations between safety factors of slope and time. After the simulation test , we know that slope factor of safety will change which depends on the position of ceack. The failure will more easy happen when the slope crack in depth position or approaching the slope top, and the behavior of slope failure also will change with crack depth.