【作者】 胡小林；

【导师】 张可能； 羊春华；

【作者基本信息】 中南大学 ， 地质工程， 2009， 硕士

【摘要】 高陡边坡是公路建设常遇到的问题,有效的治理好高陡边坡是保证公路建设和运营顺利关键之一。至目前为止,治理高陡边坡支挡结构体系有挡土墙、抗滑桩、锚索及预应力锚索抗滑桩等,工程实践表明,预应力锚索抗滑桩已发展成为高陡边坡加固的一种有效的手段。但由于桩体系与滑坡体之间的相互作用的复杂性,目前锚索抗滑桩的计算方法还仍是工程设计的难点问题之一。本文首先探讨了抗滑桩和预应力锚索的受力特点和计算方法,对各种方法存在的优缺点及该类支档结构在工程中所存在的问题等进行了系统讨论,进而分析了预应力锚索抗滑桩的抗滑机理,并假定预应力锚索抗滑桩体系变形协调,对抗滑桩的内力、锚索内力及锚索预应力的设计计算等进行了研究,对锚索自由段长度影响锚索拉力及抗滑桩内力进行了分析,在此基础上,根据体系的实际受力状况,提出了一套抗滑桩内力、锚索内力及锚索预应力的的设计原则以及设计计算方法,并根据预应力锚索抗滑桩施工特点,提出动态设计更加符合实际情况。此外,提出预应力锚索抗滑桩最优化组合设计以达到设计更加经济、合理。论文还针对预应力锚索抗滑桩施工复杂,技术要求较高等特点,具体分析了施工过程中主要问题、注意事项及施工质量监控方法等,结合湖南石门中军渡水电站进场公路边坡开挖引起的滑坡治理工程,进行优化设计,实践表明预应力锚索抗滑桩治理公路高陡边坡是既经济又有效的方法。更多还原

【Abstract】 It is one of key problems that the high-steep slopes remediate will be inevitably met during the construction of road in the western china, which resolved reasonably is one of cruxes to ensure the road construct smoothly and work smoothly. The retaining structures to remediate the high and steep slopes such as retaining wall, retaining piles, anchor and the anti-slide piles with pre-stressed anchor and so on, are often be applied in the projects of the high and steep slopes during the construction of highway from now on, one of which that the piles with pre-stressed anchor have been proved to be more effective to the problem with the practice. The big complexity of the interaction between the retaining structure system and the slope system that results in the design methods and theory of the piles with pre-stressed anchor still unreasonable to the practice.First, the mechanic characteristics of the anti-slide piles and the pre-stress anchored structure are brought into account, the same as the calculation ways. Meanwhile, the advantage and disadvantage of the calculation ways and a serial questions existed in the projects are systemically discussed. Farther the mechanism of the anti-piles with pre-stress anchored is analyzed. Based on the assumption that the consistent deformation of the system of the anti-piles with pre-stress anchored, the internal force of the anti-piles and the anchors, the pre-stress of the anchors and the free length of the anchors are deeply discussed. The retaining mechanism is researched from the factors the reasons of application, mechanical characteristics on the condition that the slope stability is analyzed on the base of digital model, at the same time, analyzing the design principle and methods of the anti-slide piles with pre-stressed anchor and bringing forward the concept of dynamic design according to the characteristics of construction of the anti-slide piles with pre-stressed anchor anchors. In addition, the optimum assembled design of the anti-slide piles with pre-stressed anchor have been set forth for the reason of more economical during the construction.The key problems and construction attentions and monitoring methods of construction are analyzed in details in the paper because of the complication of construction and the demands of construction technique. An example is given in the end of the paper, which shows the viewpoint that the anti-slide piles with pre-stressed anchor applied to remediate the high and steep high slope is an effective and economical method.更多还原