Dam body flood discharging and energy dissipating arranging method for concrete-faced rockfill dam

Abstract

The invention discloses a dam body flood discharging and energy dissipating arranging method for a concrete-faced rockfill dam. The method includes that 1 a spillway is arranged along the downstream dam face in the direction from the dam top of the concrete-faced rockfill dam to a river bed at the dam bottom, the spillway is composed of an overflow weir arranged at the dam top, a discharging groove formed in the downstream dam face and a stilling pool arranged at the position of the river bed at the dam bottom, the weir top width of the overflow weir is 1-3 times as large as the seam width of a concrete face, the seam width of the overflow weir is consistent with that of the concrete face, the width of a weir head of the overflow weir is smaller than or equal to 4m, and the single-width discharging quantity is smaller than or equal to 15m<3> / s*m; 2 a base plate of the discharging groove is arranged to be of a step structure and formed by pouring concrete or laying squared stones, the step height is 0.8m-1.2m, and pull steel bars are arranged in steps and embedded in a dam body rockfill body. The method has the advantages of optimizing junction layout, solving the problem that the spillway on the bank side is difficult to arrange, omitting excavation of spillways in bank slopes and reduces project investment.

Description

technical field [0001] The invention relates to small and medium-sized engineering concrete face rockfill dams, in particular to a method for arranging flood discharge and energy dissipation of the concrete face face rockfill dam body. Background technique [0002] The layout of discharge structures for concrete face rockfill dams should be determined based on a comprehensive comparison of project conditions. On dam sites with favorable terrain conditions, open spillways are generally used as the main discharge structures. When it is difficult to arrange open spillways When the flood discharge tunnel can also be used, but the open entrance should be used to connect the flood discharge tunnel. For small and medium-sized concrete face rockfill dams with a dam height of less than 70m, when the flood discharge is not large and the bedrock of the river bed is relatively good, in order to save engineering investment, a combination of spillways and steps for energy dissipation can ...

AI Technical Summary

Problems solved by technology

For small and medium-sized concrete face rockfill dams with a dam height of less than 70m, when the flood discharge is not large and the bedrock of the river bed is relatively good, in order to save engineering investment, a combination of spillways and steps for energy dissipation can be arranged on the dam body. However, there have been no reports

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