【作者】 陈红其；

【导师】 张光碧；

【作者基本信息】 四川大学 ， 水工结构工程， 2005， 硕士

【摘要】 拱坝发展历史悠久,上溯最早有古罗马人已利用拱的原理筑坝。第一次世界大战以后直到40 年代,拱坝才开始有所发展,大多数修建在美国,坝型主要为重力拱坝。拱坝的真正大量修建,是在第二次世界大战以后,特别是西欧一些国家。我国拱坝建设也后来居上,数量已是世界第一。拱坝坝肩岩体抗滑稳定分析也有了较为系统的理论。要在计算理论上再有较大的突破已较困难,但提高计算精度和速度是一条可行的路子。拱坝建设对坝址的地质地形条件要求较高,拱坝失事率也较其他坝型小得多。但在失事、事故和病害的拱坝中,由于坝肩岩体失稳出问题的比例很大,有一半左右。本文针对拱坝坝肩稳定展开研究,对运用现有且常用的计算理论——刚体极限平衡法进行抗滑稳定分析时,如何提高计算精度作了详细介绍。查阅大量关于拱坝坝肩稳定的计算资料后,第二章总结了目前常用的各种分析方法,着重介绍了刚体极限平衡法。现阶段,刚体极限平衡法是研究拱坝坝肩抗滑稳定的主要方法,且规范规定“拱座抗滑稳定的数值计算方法,刚体极限平衡法为主”。所以,有必要对如何更好运用该理论进行深入研究,以提高计算精度。随着计算机技术的发展,拱坝坝肩空间稳定分析的数解法得到了迅猛发展,计算速度、精度都大大提高。本文第三章中,着重介绍利用计算机编制程序来更多还原

【Abstract】 Arc dam has a long history. It can date back to the Roman damed with arch theory. After the First World War till 1930’, arch dam starts to develope, the bulk are built in American and generally are gravity arch dam. Arch dam is built largely after the World War Two, espetially in some western European countries. Arch dam construction in China has developed and the quantity stands first. Analysis of arch dam abutment rock mass sliding stability has formed systemal theory. It is very hard in breaking through computational theory, but it is feasible to boost calculation accuracy and speed. Arch dam requires strict qualification on geologic and topographic conditions at dam site, so the failure ratio of arch dam is much smaller than the others. Among the arch dams which failure, accident and catastrophy, the ratio of failure because of the unstable abutment rock mass is one point five or so. This article makes research in arch dam abutment sliding stability, introduces in details on how to prove calculation accurary when utilizing the common computational theory----rigid body limiting qualification method to sliding stability analysis. After consulting a lot of computational information on arch dam abutment stability, all kinds of analytic method generally used in present are listed in Chatacter Two, rigid body limiting equilibrium method has a special description. At present, rigid body limiting equilibrium method is the mainly means in arch dam abutment sliding stability, and the code specifies that among numerical computational methods of sliding stability at arch abutment, rigid body limiting equilibrium is head and front. So it is necessary to make an ulterior research on how to make use of that theory effectively to boost calculation accuracy. Along with the advancement of computer technology, arch dam abutment spatial stability of numerical method makes a great progress, and computed speed and calculation accurity enhance greatly. Chapter Three puts emphasis on realizing numerical method by computer program. Generally speaking, a good algorithm must be easily compilled and is not complex of temporal and spatial dimension. A good computational model must simulate actural project state exactly. In arch dam abutment sliding stability, it is the keypoint in assessment of abutment rock mass stability that the exact value of all kinds of force. The theme of this thesis is making our’s best in advancing the calculation accuracy under the present computational theory and computing condition. Connecting with the SHI CHENT ZI arch dam, Chapter Four describes the whole progress of its abutment sliding stability compactly and analysises the main factors affecting result and preciseness. It provides calculational method and procedure approving dead height of dead weight and uplift to solve arch dam abutment stability in Xijiang Shichengzi successfully. The vitality of computational theory lies with the usage in actural project, while that of computational method lies with getting result exactly and quickly as soon as possible. Progress in theory advances the development of theory, and progress in idiographic can boost the qualification of theory application. This thesis aims at the latter and works out computer procedure. The result can supply reference to the likes.更多还原