【作者】 王亮；

【导师】 苏谦；

【作者基本信息】 西南交通大学 ， 道路与铁道工程， 2010， 硕士

【摘要】 近年来,道路与铁道工程的大量建设产生了很多边坡防护工程。随着人们环保意识的提高,边坡防护工程不仅要满足工程方面的要求,而且要重视进行绿色防护,尽量减少人工雕琢的痕迹,使其与周围环境相协调。我国沿海地区的边坡防护工程遇到的一个突出问题就是经常受到强台风、强降雨的影响。强台风、强降雨可以对边坡产生侵蚀,甚至影响线路的正常运营,而目前关于风和雨对边坡作用的研究还很不深入,设计和施工往往依靠以往的经验,照搬固定的模式,带有很大的盲目性,迫切需要进行系统的研究。本文以海南东环铁路的土质路堤边坡的防护为例,采用数值模拟、模型试验和现场试验等方法,对风和雨对路堤边坡的作用和风和雨作用条件下合理的护坡形式等问题进行了研究。(1)研究了在风的作用下路堤边坡迎风面和背风面风场的分布,提出了针对强风情况下路堤边坡护坡植物的选择及养护的一些建议。分析了降雨对边坡土体的侵蚀作用及边坡土层性质对侵蚀的影响。对风和雨共同作用情况下对边坡土体的侵蚀作了一些初步的探讨。(2)详细介绍了植被护坡技术,通过人工模拟降雨试验验证了植被护坡机理,说明植被护坡不仅具有美化环境的功能,更重要的是其具有很强的护坡效果,能有效的降低风和雨对边坡的侵蚀,提出工程防护结合植被护坡的防护形式是合理的强台风、强降雨情况下的护坡形式。(3)进行了现场试验,发现路基边坡病害往往是由于施工质量不合格及不注意日常的养护工作,各种护坡措施未发挥出应有的效能造成的,在护坡工程中应对施工质量及日常的养护工作引起足够的重视,使边坡防护工程能够达到预期目的。更多还原

【Abstract】 In recent years, a large number of road and railway construction projects generate a lot of slope protection works. With the increased awareness of environment protection, slope protection works should not only meet the engineering requirements, but also pay attention to the greening to minimize traces of artificial carving and harmonize with the surrounding environment. A prominent problem encountered of Chinese coastal slope is the impact of heavy rainfall and strong typhoons, which may produce slope erosion, even affect the normal operation circuit, and now studies referring the effects that wind and rain acting on the slope is not that deep, the design and construction tend to rely on previous experience and follow a set pattern with a lot of blindness, so systematic study is urgently needed. In this paper, embankment slope protection of Hainan East Central Railway was taken as an example, by using numerical simulation, model text and field test,issues like the role of the wind and rain acting on the soil subgrade slope and reasonable forms of slope protection under wind and rain conditions were studied.(1) The wind field distribution of the windward and leeward embankment slope under the effect of the wind were studied, recommendations about the choice and protection of embankment slope plants for strong wind case was proposed. Rain and slope soil properties affecting the slope erosion was analyzed. Some preliminary discussion about the slope soil erosion under the interaction of wind and rain was carried out.(2) The biotechnical was particularly introduced and mechanism of biotechnical was verified by artficial rainfall simulation tests, the vegetation slope not only beautified the environment, but more importantly had a strong slope protecting impact, which could effectively reduce the wind and rain erosion on the slope, and the protective form of engineering protection combined with Vegetation Protection was considered reasonable for strong typhoon and heavy rainfall.(3) Field tests were conducted and subgrade slope disease was found due to the substandard construction quality and heedless routine maintenance work, as well as slope protection measures not playing its sufficient performance. Thus in slope protection project, construction quality and routine maintenance work should be regarded seriously enough to achieve the desired results.更多还原