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岩土工程中治理边坡不稳定性的技术研究
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作者 聂靖枫 《中文科技期刊数据库(全文版)工程技术》 2021年第9期362-362,364,共2页
我国地形复杂多样,大部分地区地层岩性复杂,新构造运动活动强烈,地震、滑坡等灾害频繁,受复杂脆弱的地质环境条件和不利的气候条件影响,岩土工程边坡地质灾害防灾减灾难度进一步凸显。本文对岩土工程中治理边坡不稳定性的技术进行了探讨... 我国地形复杂多样,大部分地区地层岩性复杂,新构造运动活动强烈,地震、滑坡等灾害频繁,受复杂脆弱的地质环境条件和不利的气候条件影响,岩土工程边坡地质灾害防灾减灾难度进一步凸显。本文对岩土工程中治理边坡不稳定性的技术进行了探讨,文章从阐述确保边坡稳定性的重要性入手,进一步分析了治理边坡不稳定性的基本技术手段,最后提出了全面保证岩土工程边坡稳定的综合措施。 展开更多
关键词 岩土工程 边坡不稳定性 岩土勘察 边坡支护 自然灾害防患
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降雨期间径流和渗透对水库边坡稳定性的影响分析
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作者 曹秋丽 《水利科技与经济》 2024年第3期1-4,共4页
为了分析降雨期间径流和渗透对边坡破坏的影响,考虑径流、渗透和边坡失稳之间的关系,提出地表径流和土壤水流的耦合模型。结果表明,径流深度较大会增加渗透,导致沿斜坡坡面的侵蚀;地表径流和土壤水流的耦合模型,可用于评估降雨-径流引... 为了分析降雨期间径流和渗透对边坡破坏的影响,考虑径流、渗透和边坡失稳之间的关系,提出地表径流和土壤水流的耦合模型。结果表明,径流深度较大会增加渗透,导致沿斜坡坡面的侵蚀;地表径流和土壤水流的耦合模型,可用于评估降雨-径流引起的边坡不稳定性;径流对边坡的破坏有显著影响,低渗透性的沥青层可有效阻止降雨的渗透,限制边坡的破坏规模。 展开更多
关键词 地表径流 土壤水流 边坡不稳定性 局部安全系数
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青海玉树藏娘佛塔震后场地稳定性的研究
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作者 赵殿有 陆清有 《中国勘察设计》 2011年第4期66-69,共4页
根据灾后重建工作的需要,通过对藏娘佛塔场地震后稳定性的分析评价,以及对场地北、东两侧临岸边坡稳定性的初步研究和评价,从而得出边坡稳定性对古建筑场地的影响,提出对其进行加固防护的建议。
关键词 震后玉树藏娘佛塔 场地的稳定性 边坡不稳定性
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Post-earthquake Rainfall-triggered Slope Stability Analysis in the Lushan Area 被引量:4
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作者 YANG Zhi-hua LAN Heng-xing +4 位作者 LIU Hong-jiang LI Lang-ping WU Yu-ming MENG Yun-shan XU Liang 《Journal of Mountain Science》 SCIE CSCD 2015年第1期232-242,共11页
The "4.20" Lushan earthquake in Sichuan province, China has induced a large amount of geological hazards and produced abundant loose materials which are prone to post-earthquake rainfall- triggered landslides. A det... The "4.20" Lushan earthquake in Sichuan province, China has induced a large amount of geological hazards and produced abundant loose materials which are prone to post-earthquake rainfall- triggered landslides. A detailed landslide inventory was acquired through post-earthquake emergent field investigation and high resolution remote sensing interpretation. The rainfall analysis was conducted using historical rainfall records during the period from 1951 to 2010. Results indicate that the average annual rainfall distribution is heterogeneous and the largest average annual rainfall occurs in Yucheng district. The Stability Index MAPping (SINMAP) model was adopted to assess and analyze the post- earthquake slope stability under different rainfall scenarios (light rainfall, moderate rainfall, heavy rainfall, and rainstorm). The model parameters were calibrated to reflect the significant influence of strong earthquakes on geological settings. The slope stability maps triggered by different rainfall scenarios were produced at a regional scale. The effect of different rainfall conditions on the slope stability is discussed. The expanding trend of the unstable area was quantitatively assessed with the different critical rainfall intensity. They provide a new insight into the spatial distribution and characteristics of post- earthquake rainfall-triggered landslides in the Lushan seismic area. An increase of rainfall intensity results in a significant increase heterogeneous distribution strongly correlated with of unstable area. The of slope instability is the distribution of earthquake intensity in spite of different rainfall conditions. The results suggest that the both seismic intensity and rainfall are two crucial factors for post- earthquake slope stability. This study provides important references for landslide prevention and mitigation in the Lushan area after earthquake. 展开更多
关键词 Lushan earthquake RAINFALL Slopestability SINMAP DEM
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Study on high and steep slope stability of surface mine based on RFPA-SRM 被引量:2
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作者 WANG Dong CAO Lan-zhu +2 位作者 PIAO Chun-de XUE Ying-dong WANG Meng 《Journal of Coal Science & Engineering(China)》 2011年第2期119-123,共5页
The instability and failure mechanism of high and steep slopes in surface mines, and the basis for some reasonable landslide prevention measures were provided using the RFPA-SRM. Based on the actual progress of the Pi... The instability and failure mechanism of high and steep slopes in surface mines, and the basis for some reasonable landslide prevention measures were provided using the RFPA-SRM. Based on the actual progress of the Pingzhuang Western Surface Mine and based on strength reduction method, the dynamic instability processes of the top high and steep slope was simulated. Also, the landslide mode was determined, the characteristics of the displacement distribution, the deformation, failure, and the stress distribution in the slope were demonstrated, and the stability was calculated. Conclusions can be drawn as follows: the landslide or failure of high and steep slopes on a surface mine is a gradual process, in which the slope undergoes the generation, expansion, and connection of the fractures and the displacement increases until landslide occurs; a small portion of the upper rocks fail due to the tension and the lower rocks fail due to the shear; the potential sliding surface is combined and the essential cause of the landslide is the shear stress concentration. 展开更多
关键词 strength reduction method high and steep slope slope stability landslide mechanism RFPA-SRM
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Study of Slope Reinforcement Force Based on FLAC 被引量:8
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作者 HUANG Xian-wu MAO xian-biao +1 位作者 MIAO Xie-xing CHEN Zhan-qing 《Journal of China University of Mining and Technology》 EI 2006年第2期123-127,共5页
A slope will slide if the unbalanced force does not tend to zero when the stability of the slope is analyzed with the help of FLAC. Thus the ultimate reason of slope sliding is the unbalanced force determined by FLAC.... A slope will slide if the unbalanced force does not tend to zero when the stability of the slope is analyzed with the help of FLAC. Thus the ultimate reason of slope sliding is the unbalanced force determined by FLAC. The slope will remain stable if the unbalanced force is counterbalanced by a reinforcement force which is produced by a suitable reinforcement method. In this paper, the stability of the slope was analyzed by using FLAC, and the unbalanced force of the slope was obtained through the FISH function in FLAC. According to the equilibrium conditions, the relationship between the reinforcement force and unbalanced force was derived and accordingly the reinforcement force was determined. The reinforcement design was adopted by using pre-stressed anchor bars on the basis of the reinforcement force. An example is used to show that the effect of slope reinforcement based on the reinforcement force is safe and economical. The method doesn't need to suppose a sliding surface to obtain the reinforcement force, and it is also clear in physical meaning. So this method realized the organic unification of the stability analysis and the slope reinforcement. 展开更多
关键词 slope reinforcement reinforcement force unbalanced force stability analysis pre-stressed anchor bar.
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A New Approach to Plane Failure of Rock Slope Stability Based on Water Flow Velocity in Discontinuities for the Latian Dam Reservoir Landslide 被引量:3
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作者 Morteza AHMADI Majid ESLAMI 《Journal of Mountain Science》 SCIE CSCD 2011年第2期124-130,共7页
The stability of slopes is always of great concern in the field of rock engineering. The geometry and orientation of pre-existing discontinuities show a larger impact on the behavior of slopes that is often used to de... The stability of slopes is always of great concern in the field of rock engineering. The geometry and orientation of pre-existing discontinuities show a larger impact on the behavior of slopes that is often used to describe the measurement of the steepness, incline, gradient, or grade of a straight line. One of the structurally controlled modes of failure in jointed rock slopes is plane failure. There are numerous analytical methods for the rock slope stability including limit equilibrium, stress analysis and stereographic methods. The limiting equilibrium methods for slopes under various conditions against plane failure have been previously proposed by several investigators. However, these methods do not involve water pressure on sliding surfaces assessments due to water velocity and have not yet been validated by case study results. This paper has tried to explore the effects of forces due to water pressure on discontinuity surfaces in plane failure through applying the improved equations. It has studied the effect of water flow velocity on sliding surfaces in safety factor, as well. New equations for considering water velocity (fluid dynamics) are presented. To check the validity of the suggested equations, safety factor for a case study has been determined. Results show that velocity of water flow had significant effect on the amount of safety factor. Also, the suggested equations have higher validity rate compared to the current equations. 展开更多
关键词 Plane Failure Limit Equilibrium Safety Factor Water Velocity
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Coupled Numerical Analysis of the Stability Behaviour of Unsaturated Soil Slopes Under Rainfall Conditions
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作者 王成华 THOMAS H R 《Transactions of Tianjin University》 EI CAS 2003年第3期184-188,共5页
The stability behaviour of unsaturated soil slopes under rainfall conditions is investigated via a parametric finite element analysis, which is a fully coupled flow and deformation approach linked to a dynamic program... The stability behaviour of unsaturated soil slopes under rainfall conditions is investigated via a parametric finite element analysis, which is a fully coupled flow and deformation approach linked to a dynamic programming technique for determining the minimum factor of safety as well as its corresponding critical slip surface based on the stress fields from the numerical computation. The effects of rainfall features, soil strength parameters and permeability properties on slope stability are studied. The analyses revealed that the soil matric suction decreased during rainfall, especially in slopes with high permeability and/or with high suction angles of unsaturated soils. The influence of rainfall conditions on such slopes is quite obvious, and soil suction drops rapidly, which leads to a consequent quick reduction in the factor of safety. 展开更多
关键词 slope stability unsaturated soils matric suction RAINFALL finite elements factor of safety
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Determination and stability analysis of ultimate open-pit slope under geomechanical uncertainty 被引量:10
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作者 Ali Moradi Afrapoli Morteza Osanloo 《International Journal of Mining Science and Technology》 SCIE EI 2014年第1期105-110,共6页
In open-pit mines,pit slope as one of the important parameters affects the mine economy and total minable reserve,and it is also affected by different uncertainties which arising from many sources.One of the most crit... In open-pit mines,pit slope as one of the important parameters affects the mine economy and total minable reserve,and it is also affected by different uncertainties which arising from many sources.One of the most critical sources of uncertainty effects on the pit slope design is rock mass geomechanical properties.By comparing the probability of failure resulted from deterministic procedure and probabilistic one,this paper investigated the effects of aforesaid uncertainties on open-pit slope stability in metal mines.In this way,to reduce the effect of variance,it implemented Latin Hypercube Sampling(LHS)technique.Furthermore,a hypothesis test was exerted to compare the effects on two cases in Middle East.Subsequently,the investigation approved high influence of geomechanical uncertainties on overall pit steepness and stability in both iron and copper mines,though on the first case the effects were just over. 展开更多
关键词 Safety factor Probability of failure Geomechanical property uncertainty Overall pit slope Stability analysis
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