地震条件下高路堤边坡稳定性分析及震后检测

发布时间：2018-06-28 22:56

本文选题：高路堤 + 地震　；参考：《北京交通大学》2014年硕士论文

【摘要】：摘要：边坡稳定性问题一直是岩土工程界的一个重要研究内容,它涉及到土木工程的各个领域。随着交通工程的蓬勃发展和规模的不断加大,高路堤边坡不断出现在公路建设中,尤其在广阔的西部地区,有的边坡甚至高达三四十米。暴雨、地震等自然灾害的频繁发生更加加剧了边坡破坏的风险,边坡稳定性分析问题显得很有必要,同时,震后路堤质量的检测是一件繁琐的工作,而地质雷达的出现将会让这一工作变得高效准确,对节省人力、物力、财力具有重要意义。本人在综合考虑各种边坡稳定性分析方法及地震条件下边坡稳定性分析方法的基础上,基于简化的Bishop极限平衡法建立高路堤边坡模型,采用改进的蒙特卡罗技术搜索边坡临界滑动面,该搜索方法与业内人士丰富的实践经验相结合,搜索更加方便,更利于实现程序化。路堤模型基于实际情况,将高边坡分为若干层,每层合理采用实际填料,通过windows窗口应用程序对多层填土高路堤在地震条件下的稳定性系数进行计算。程序可以计算出不同高度边坡,不同坡脚、不同土层组合以及不同地震烈度甚至在浸水条件下边坡的稳定性安全系数,同时可以看出安全系数随边坡各个参数变化的情况,能够为路堤施工中采用合理的结构和参数选择提供参考,具有现实意义。应用程序采用C#语言编写,界面友好、操作简单、性能可靠。实现了边坡最危险滑动面搜索和最小安全系数的计算以及结果的可视化输出。本文总结震后路堤典型病害,并采用地质雷达技术进行探测,结果表明,地质雷达可以快速、准确的测出地震对边坡造成的病害。本文对青藏高原德令哈-香日德公路的一个路堤高边坡进行了计算,并对结果进行了分析。分析结果表明采用本文编制的程序计算结果与常用计算方法所得结果以及现场实际调查情况相吻合,说明该计算程序具有一定的可靠性和实用性。
[Abstract]:Absrtact: slope stability is always an important research content in geotechnical engineering, which involves various fields of civil engineering. With the vigorous development and scale of traffic engineering, the high embankment slope appears continuously in the highway construction, especially in the vast western area, some slopes are even as high as 30 to 40 meters. The frequent occurrence of natural disasters, such as rainstorms and earthquakes, has aggravated the risk of slope failure, and slope stability analysis is necessary. At the same time, the quality detection of embankment after the earthquake is a tedious task. The appearance of GPR will make this work more efficient and accurate, which is of great significance to save manpower, material resources and financial resources. On the basis of comprehensive consideration of various slope stability analysis methods and slope stability analysis methods under earthquake conditions, the author establishes the slope model of high embankment based on simplified Bishop limit equilibrium method. The improved Monte Carlo technique is used to search the critical sliding surface of the slope. The search method is combined with the rich practical experience of the industry, and the search is more convenient and more convenient for the realization of programming. Based on the actual situation, the embankment model divides the high slope into several layers, each layer reasonably using the actual filler, and calculates the stability coefficient of the multi-layer embankment under earthquake through windows window application program. The program can calculate the slope stability safety factor of different height slope, different slope foot, different soil layer combination, different earthquake intensity and even under the condition of flooding, at the same time, it can be seen that the safety factor varies with each parameter of slope. It can provide reference for reasonable structure and parameter selection in embankment construction. The application program is written in C # language, friendly interface, simple operation and reliable performance. The most dangerous sliding surface search, the calculation of the minimum safety factor and the visual output of the results are realized. In this paper, the typical diseases of embankment after earthquake are summarized, and the geological radar technique is used to detect the slope diseases caused by earthquake. The results show that the ground penetrating radar can detect the slope diseases caused by earthquake quickly and accurately. In this paper, a high slope of embankment of Delingha-Xiangride highway in Qinghai-Tibet Plateau is calculated, and the results are analyzed. The results of analysis show that the calculation results of the program compiled in this paper are in agreement with the results of common calculation methods and the actual investigation on the spot, which shows that the program has certain reliability and practicability.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14

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