Method for evaluating leakage of asphalt concrete core wall dam in narrow river valley

Abstract

The invention relates to the technical field of damming, in particular to a method for evaluating leakage of an asphalt concrete core wall dam in a narrow river valley. The influence of the dam body,the bank slopes on the two banks and the narrow valley terrain on the bituminous concrete core wall dam can be rapidly and visually quantified, and meanwhile, the critical leakage coefficient is provided for judging the possibility of leakage between bituminous concrete at the bottom of the core wall and a riverbed and between bases on the two banks; compared with a traditional two-dimensional discrimination method, the influence of narrow valleys on core wall stress cannot be considered, and the core wall stress state and the leakage possibility can be reflected more truly.

Description

technical field [0001] The invention relates to the technical field of dam building, in particular to an evaluation method for leakage of asphalt concrete core dams in narrow valleys. Background technique [0002] At present, with the continuous development of dam-building technology in my country, asphalt concrete core wall dams have made breakthroughs in both height and quantity. For example, the Storglomvatn dam in Norway is 128m high, and the Niya Reservoir dam in Xinjiang, which is under construction in my country, is 131.8m high. In the construction of high asphalt concrete core wall dams, the water leakage problem caused by the hydraulic splitting of the asphalt concrete core wall will attract the attention of water conservancy experts and scholars for a long time. The asphalt concrete core wall is different from the clay anti-seepage material, because the porosity of the asphalt concrete material is very small , the internal pore water pressure is discontinuous, so the...

AI Technical Summary

Problems solved by technology

However, at present, there is no standard for quantifying the influence of the asphalt concrete core wall by the narrow valley topography and the dam shell material and judging the water leakage. Therefore, it is important to put forward corresponding standards and evaluate the possibility of water leakage in the asphalt concrete core wall of this type of dam. It is also very meaningful to predict whether the asphalt concrete core wall will leak in the early design and later operation

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