【作者】 邹新特；

【导师】 刘朝晖； 秦志斌；

【作者基本信息】 长沙理工大学 ， 道路与铁道工程， 2012， 硕士

【摘要】 随着我国高速公路的快速发展，越来越多的高速公路不断往山区延伸和发展，在山区复杂的地形、地貌和地质条件下建设技术标准要求高的公路，路基工程中势必会存在大量的深挖路堑工程。山区公路高边坡失稳问题关系着人的生命安全、财产安全和公路的修建效率以及通车后公路的正常通车、运营效率。虽然边坡坡体在自然状态下一般处于稳定状态，但是在雨水或人类活动等外界其他因素的影响下，边坡会发生失稳破坏，所以为了人们的生命安全和财产安全，在边坡刚发生失稳或者失稳之前必须采取可靠的处治措施，以阻止失稳破坏的继续发展。因此，进行山区公路路堑边坡处治研究意义重大。本文针对南岭山区地形条件变化大、地层岩性和地质结构复杂的地质特点，开展了典型路堑边坡滑坡处治研究。通过实地调查和相关文献资料的查找总结了南岭山区的工程地质条件，实地调查南岭山区已建和在建的公路路堑边坡，分析了在该地区修建公路路堑边坡的特点；以在建的湖南炎汝高速公路为依托，选取了K19+190~K19+320段右侧高边坡和K127+800~K127+900段右侧高边坡两个典型滑坡边坡，分析了边坡的滑坡特征以及滑坡产生的原因；结合南岭山区的工程地质情况、路堑边坡的特点以及施工条件等提出了适合南岭山区边坡滑坡处治的包括刷方减载、强支护、弱支护，并与坡面防护、排水措施和坡体灌浆等相结合的综合处治措施，并对炎汝高速公路两个典型路堑边坡滑坡提出了详细的处治方案。最后用FLAC3D软件对K19+190~K19+320段右侧高边坡进行了滑坡处治前后的数值模拟分析和对K127+800~K127+900段右侧高边坡的两种处治方案进行了数值模拟分析，分析结果为：K19+190~K19+320段右侧高边坡的安全系数由滑坡处治前的0.57提高到了滑坡处治后的1.50，处治后最大位移明显减小；K127+800~K127+900段右侧高边坡的两种处治方案都能满足边坡稳定性要求，而且最大位移也基本相等，所以从经济性、施工工艺等方面来比较两种处治方案，方案一比方案二节省费用241.7万元，施工可操作性方面方案一也优于方案二，所以最终选择了方案一进行处治。目前，K19+190~K19+320段右侧高边坡已经施工完了抗滑桩和锚索地梁支护，K127+800~K127+900段右侧高边坡已经基本卸载完成，从施工现场和监测数据可以看出这两个边坡现处于稳定状态，说明处治效果良好。更多还原

【Abstract】 With rapid development of our country’s expressways, more and moreexpressways continuously extended to mountain areas. There will certainly existplenty of deep digging cutting engineering in roadbed engineering if we want to buildsome roads at a high level under so complex topography, landforms and geologyconditions in mountain areas. The high-slop instability of roads in mountain areas isclosely related to life safety, property safety, construction efficiency and operationefficiency. Although the slope is stable under natural conditions, the stability of theslope will be damaged by other external factors such as rainwater and humanactivities. In order to keep people’s life and property safe, some treatment measuresmust be taken before or just after the instability so that we can stop the consequencesof instability from keeping on expanding. Therefore, carrying out researches intothe treatment of the slope’s instability has a great significance.This paper does researches into the treatment of the typical road slope in the lightof geological characteristics such as changeable topography, rock stratum andcomplex geology structure. This paper summarizes the geology condition according toexperimental analysis and document data, investigates the road slope having built orbeing built and analyzes the characteristics of the road slope in this area. SinceK19+190~K19+320 and K127+800~K127+900 are parts of Hunan Yanru Expressway;what’s more, these two parts are typical landslides. Therefore, both of them areselected to be studied to analyze the characteristics of the landslide and the causes ofthe slide. The paper poses the comprehensive treatments contain cutting slope andreducing load, strong supporting, short supporting and them combined with slopeprotection, drainage measure, slope grouting and so on for the cutting slopes inNanling as well as the detailed ways for the above two mentioned typical cuttingslopes, which is based on the characteristics of geological conditions in Nanling andconstruction requirements. This paper does a pre-numerical-simulation analysis and apost-numerical-simulation analysis for K19+190~K19+320 and two treatmentschemes analysis for K127+800~K127+900 respectively. The results are safety factorincreased to 1.50 after treatment from 0.57 and the displacement reduces obviously ofK19+190~K19+320. The two treatment schemes can meet the requirements ofstability and the maximum displacement are almost equal of K127+800~K127+900. So compared with the two treatment schemes from economy and constructiontechnology, etc. Compared with the second scheme, the first scheme can save 2.417million yuan, construction technology also better. Therefore, this paper chooses thefirst program.Anti-slide pile and anchor rope ground beam retaining have been constructed ofK19+190~K19+320 at present. Earthwork have already unloaded of K127+800~K127+900. Now the two slope are at the state of stability from construction site andmonitoring data. So we can think that the treatment results are well.更多还原