【作者】 侯伟宁；

【导师】 郑黎明；

【作者基本信息】 西南交通大学 ， 地质工程， 2012， 硕士

【摘要】 随着交通建设的快速发展,沿河流、水库修建的高速公路、铁路越来越多,库岸路基稳定性问题引起广泛的关注。内六铁路位于横江伏龙口水电站左岸上,水库正常蓄水292m。水库蓄水后路堤边坡的自然平衡状态将被改变,在这种情况水岩相互作用可能会使内六铁路路基失稳破坏。它不仅影响到水库的正常运作和高速公路运营安全,还直接影响到当地居民的生命财产安全。本文以内六铁路路基边坡为研究对象,根据岸坡岩体的结构特征、物质组成、以及铁路与蓄水位的关系,将库岸分为五个区段进行研究。首先对内六铁路五个区段的地形地貌、地质构造、地质岩性、坡体特征等工程地质条件调查；用卡丘金方法对五个区段进行塌岸预测,结果表明第四区段路基塌岸最严重,所以该路基段作为重点研究路段。其次,对选出重点研究路基段来分析其失稳模式及稳定状况,建立稳定性计算模型,用极限平衡条分法对路基边坡稳定性进行计算。运用传递系数法确重点定路基边坡在不同工况下的安全系数。采用运用plaxis有限元数值模拟对铁路路基稳定性进行模拟。结果分析表明：本文对重点路段K143+970～K144+060段进行数值模拟,结果表明该段路基边坡在初始水位状态是稳定的。水库蓄水路基边坡是不稳定。数值模拟结果和计算结果相一致。该路基边坡的研究,对今后类似路基边坡的分析和加固工作具有一定借鉴意义。更多还原

【Abstract】 Nowday, with the development of our country’s railway, many railways were built along rivers, lakes and reservoir. The nei liu railway is located in the left bank of Reservoir area of heng jiang River’s fulongkou power station. Library normal storage level elevation is about292meters.The natural balance of embankment slopes is changed after the impoundment.The interaction between water and rock makes slope instability and failured in special conditions. not only it affects the normal operation of hydropower stations and the highway operating safety, but also directly relates the safety and property of the local residents.This paper mainly studies the railway roadbed slope which of the nei liu railway in the fulongkou reservoir area. It will be divided into five segments of roadbeds, According to the bank slope rock mass structure characteristics, material composition, as well as the railway and water level of reservoir bank. First of all, through field existing data, identify stratum lithology, physiognomy, geological formation, meteorological and hydrological condition; Using the Cacho method to prediet recycling width of water impact on reservoir banks embankment slope.the results show that the fourth section roadbed bank collapse is the most serious.Therefore, it is Correct that we should choose fourth sections focus on road. Secondly,based on the characteristics about the nei liu railway roadbed slope distribution and the stability of the slope, choose the focus on roadbed of the instability mode and stable situation, the model of stability calculation is established to analyze the stability of slope by the limit equilibrium slice method.The safety factors at the different working condition for roadbed slope can be determined by the transfer coefficient method.Last but not least, utilizing the software of PLAXIS completes simulation of the roadbed slope’stability.The analysis and calculation results indicated:This paper focuses on the K143+970K144+060sections are numerically simulated, the results show that the roadbed slope at the initial water level state is safe.however, After a reservoir was filled with water, the roadbed slope is unstability.The numerical simulation results and the calculation results are consistent. The qualitative calculation the study of the roadbed slope might be used for referenee to the similar engineerings.更多还原