求毕业论文英语摘要,不要工具翻译的,哥也会上网.英语牛人

求毕业论文英语摘要,不要工具翻译的,哥也会上网.英语牛人
延安地区黄土边坡土钉支护的应用研究
虽然土钉支护技术的研究和发展已经进入比较成熟的阶段,然而对于不同特性土体的支护技术的研究仍不完善.陕北过去是欠开发地区,对该地区黄土性能与支护技术的的研究和分析过去很少,随着近几年资源的开发利用并结合国家支持西部发展的政策,城市建筑、铁路与公路建设的规模也越来越大,投资逐年增加.因此,对该地区特殊的土壤条件以及土体边坡支护的研究也越来越紧迫.
本文采用工程实例与数值模拟结合比较的方法,通过对前人研究的总结,探讨了在特殊的延安地区黄土边坡条件下土体的支护问题,提出了土钉支护技术在该地区的应用.总结出了一些结论并结合实际工程提出了一些具体的施工建议.
土钉支护作为一种经济、可靠的新型基坑支护技术,有着美好的发展前景,其相比其他一些支护形式具有更加明显的实用价值.但是,土钉支护技术因为设计考虑的因素多,计算量一般都特别大,因此,合理运用计算机辅助计算和设计,采用有限元分析软件MIDAS GTS对土钉支护进行了分析.
本文先介绍了国内土钉支护技术发展的现状,接着详介绍了土钉支护技术的工作机理,然后采用了有限元计算与数值模拟技术进行了模拟分析,并根据具体的工程实例进行了现场监测与测试.在此基础上,获得了一点结论：
1、土钉与土体通过摩擦作用形成了一个柔性结构体,共同承担基坑变坡滑移和变形,土钉是这种结构体的骨架.
2、土钉变形后被动受拉,应力分散传播于土体之间减缓了应力集中造成的工程危害,使土钉在整个分布区域内剪力减小.
3、土钉支护的空间效应明显,应力在土钉上呈梯形分布,两端小中间大.在开挖区域的上部,具有很强的空间效应.
关 键 词：黄土；边坡；土钉支护；数值模拟；监测
研究类型：应用研究

Although the research and development of soil nailing technology have already entered the matural stage, the supporting technology research of different characteristics soil is still not perfect. In the past Shanbei is a place which lack of development. few research and analysis of Loess property and support technology were made in the past few years, with the development and utilization of resources and the combination of national policy on supporting western development , the scale of city building, railway and highway construction is becoming larger, investment increased year by year.Therefore, the special soil conditions in the region and research of soil slope supporting has become more and more urgent.
This paper adopts the compared method of combining numerical simulation with engineering examples , based on the former research summary, discussed the supporting problem of soil under the condition of loess slope soil in the special region of Yanan , put forward soil nailing technology applied in this area. Summarized some conclusion and put forward some concrete suggestions on construction against actual works
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as a kind of economic, reliable new excavation retaining technology, Soil nailing supporting has good development prospects and a more obvious practical value as compared to some other form of support. However, because the design of soil nailing technology take many factors into account , calculation are general large, therefore,.