Impervious face slab anti-seismic structure of concrete rock-fill dam and construction method thereof

Abstract

Provided is an impervious face slab anti-seismic structure of a concrete rock-fill dam and a construction method of the impervious face slab anti-seismic structure of the concrete rock-fill dam. The impervious face slab anti-seismic structure of the concrete rock-fill dam is characterized in that a permanent horizontal seam is arranged on an impervious face slab which is placed on 70-85 percentages of the height of a concrete rock-fill dam body, and the permanent horizontal seam is vertical to the slope direction of the impervious face slab of the concrete rock-fill dam body; a steel bar in the impervious face slab does not pass through the permanent horizontal seam; tiepiece construction members are buried in the concrete rock-fill dam body which is arranged on the upper side and lower side of the permanent horizontal seam, and one ends of the tiepiece construction members are fixed in the impervious face slab; the distance between first tiepiece construction members of each side of the permanent horizontal seam and the permanent horizontal seam is 0.5 m, and distances of other adjacent tiepiece construction members increases progressively in a geometric progression and taking 2 as common ratio mode. By giving range, number and structural type of the permanent horizontal seam additionally arranged on a local place, dislocation of the face slab can be effectively prevented from generating under the influence of seismic ground motion. The impervious face slab anti-seismic structure of the concrete rock-fill dam and the construction method of the impervious face slab anti-seismic structure of the concrete rock-fill dam can greatly improve atress condition of the face slab under the influence of the seismic ground motion, and prevents the face slab from being cracked to cause leakage.

Description

technical field [0001] The invention relates to an anti-seismic structure of a concrete anti-seepage face plate of a water conservancy and hydropower face face dam. In particular, the invention relates to an anti-seepage panel anti-seismic structure of a concrete rockfill dam and a construction method thereof. Background technique [0002] As the main anti-seepage structure of concrete face rockfill dam, its safety and reliability have been one of the main issues concerned by the dam industry. Due to the weak ability of concrete materials to resist tensile deformation, it is easy to produce structural horizontal tensile cracks penetrating through the panel under the action of self-weight and earthquake load, which makes the anti-seepage system in this part invalid. [0003] Some existing face dams are equipped with horizontal construction joints. Among them, Zipingpu face rockfill dam experienced the "5.12 Wenchuan Earthquake", and the second and third stages of the face fa...

AI Technical Summary

Problems solved by technology

Due to the weak ability of concrete materials to resist tensile deformation, it is easy to produce structural horizontal tensile cracks penetrating through the panel under the action of self-weight and earthquake load, which makes the anti-seepage system in this part invalid

Images