岩质边坡楔体稳定分析与临界滑面有哪些信誉好的足球投注网站-中仿科技.PDFVIP

32 1 Vol.32 No.1 2013 1 Chinese Journal of Rock Mechanics and Engineering Jan. 2013 12 2 2 12 (1. 430072 2. 430072) Hoek-Bray Hoek-Bray P 642 A 2013 WEDGE STABILITY ANALYSIS FOR ROCK SLOPE AND SEARCH FOR CRITICAL SLIP SURFACES 12 2 2 12 JIANG Qinghui LIU Xianhua WEI Wei ZHOU Chuangbing (1. School of Civil and Architectural EngineeringWuhan UniversityWuhanHubei 430072China 2. State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanHubei 430072China) Abstract In the stability analysis of rock wedgejudgment for sliding modes of the wedge is very important for stability assessment of rock slope and design of excavation and support schemes. This paper discusses the problem of sliding modes of the wedges and analyzes the causes of resulting in false sliding modes in Hoek-Bray method. An improved method for wedge stability analysis is proposed by employing the kinematical conditions for wedge failures to modify Hoek-Bray method. Considering the scatter in the dip and dip direction measurementsone set or two sets of discontinuities forming the wedges are not determined. This paper developed an optimal approach for undetermined wedge blocksin which the genetic algorithm is used to locate the critical sliding surfaces and search for the wedge which has the minimum factor of safety. The method provides a lower bound solution with conservative advantage and the stability of rock slope can be assured. Key words slope engineering rock slope stability of rock wedge failure modes locating critical fa