Spatial Stability Analysis Of Abutment Rock Mass Of Arch Dam

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.