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A Slope Limit Analysis Approach Based on Translation & Rotation Kinematical Field

Author: XiongKai
Tutor: LingDaoSheng；ChenYunMin
School: Zhejiang University
Course: Geotechnical Engineering
Keywords: Slope Playground Stability safety factor Limit Analysis
CLC: TU43
Type: Master's thesis
Year: 2006
Downloads: 133
Quote: 3
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Abstract

Engineering project is the most common form of engineering the landslide problems encountered in engineering is one of the world's three major geological disasters , seriously endangering the safety of human life and property . With the rapid development of China's economic construction , slope instability problems have become increasingly prominent , the study has important implications for slope stability problems . Firstly, the analysis method of slope stability safety factor : limit equilibrium method , finite element strength reduction method , limit analysis method for a simple and summarized , analyzed in detail , respectively, based on the pure rotational ( Chen , 1975 ) and pure translational (Michalowski, 1995) plastic playground safety factor of slope stability maximum limit analysis solution . On this basis, meet plastic flow rule translation plus rotation playground and stability safety factor calculation method . Flat-screen action and pure rotational playground two special cases of the sports model is proposed in this paper . This paper assumes that the sliding surface for the arc , logarithmic spiral and the sliding surfaces of arbitrary shape , using improved Monte Carlo method ( Lee Yuk super , 2005 ) search for the most dangerous sliding surface , and the preparation of the corresponding analytical procedures . Through a large number of numerical analysis , the following conclusions: ( 1) the sliding surface for a given rotational velocity component on the energy dissipation in the inter-strip has a great influence , different rotational speeds corresponding to a different safety factor , rotational speed so that the most likely the sliding face of the minimum safety factor should be stable . (2) compared with flat screen Activity Arenas , gives smaller, more close to the true value of the safety factor for a given sliding surface , the proposed translational plus rotational stadium ceiling solution, the relative difference between the two can even be as high as 20%. (3) for a homogeneous slope , the most dangerous sliding surface is not always such as Chen logarithmic spiral , especially when the soil cohesion small . ( 4 ) based on the associated flow rule , the safety factor to be larger soil internal friction angle calculated safety factor is calculated based on the non- associated flow rule , dilatancy angle . Finally, stability analysis conducted on the the seven sub Mountain landfill expansion project , pointed out that when the landfill body along the sliding base or liner occurred translational destruction .

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