Dam body prepressing inverted filling construction method for ultra-high concrete panel rock-fill dam

Abstract

The invention relates to a superhigh concrete faceplate rock-fill dam body precompressed reverse reclamation construction method, which comprises: performing the first stage reclamation of the dam body bedding, base and enrockment; performing the second stage reclamation to the dam body according to the normal step shape in upstream-high and downstream-low to form a flood protection economic section; performing the third stage reclamation by using enrockment materials after the flood season to cause the downstream of the section higher than the upstream and cause the embankment on the downstream part of the dam body to settle in the construction period; performing the other stages of reclamation of the enrockment dam until the height of the dam body reaches the designed value. The invention changes the previous reclamation arrangement which gives priority to the front part with complex construction processes, improves the dam body water storage period displacement distribution greatly, causes the maximum horizontal displacement of the upstream dam slope to reduce from 100cm to 50cm (upstream slope middle part ) and to distribute uniformly along the dam slop level, and such displacement distribution reduces the different deformation generated in the enrockment material and bedding material and plays an important role in improving the faceplate supporting condition.

Description

technical field [0001] The invention relates to the field of filling construction of super high face rockfill dams. technical background [0002] The construction technology of general rockfill dams is more concerned with the construction progress, mainly in the front area with complex construction procedures. The body dry density gradually increases from the upstream area of ​​the dam body to the downstream area of ​​the dam body, and the porosity presents a trend of gradually decreasing from the upstream area of ​​the dam body to the downstream area of ​​the dam body. In this way, the overall settlement laws of the upstream and downstream rockfill bodies of the dam body are inconsistent, resulting in unbalanced settlement deformation of the rockfill body of the dam body, which has an adverse effect on the operation of the concrete slab of the dam body, and even causes cracks in the concrete slab. The safe operation of the rockfill dam has unsafe effects. Contents of the...

AI Technical Summary

Problems solved by technology

[0002] The construction technology of general rockfill dams is more concerned with the construction progress, mainly in the front area with complex construction procedures. The body dry density gradually increases from the upstream area of ​​the dam body to the downstream area of ​​the dam body, and the porosity presents a trend of gradually decreasing from the upstream area of ​​the dam body to the downstream area of ​​the dam body. In this way, the overall settlement laws of the upstream and downstream rockfill bodies of the dam body are inconsistent, resulting in unbalanced settlement deformation of the rockfill body of the dam body, which has an adverse effect on the operation of the concrete slab of the dam body, and even causes cracks in the concrete slab. The safe operation of the rockfill dam has unsafe effects

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