Method for building gravity dam on deep and thick cover layer and spandrel concrete gravity dam structure

Abstract

The invention discloses a method for building a gravity dam on a deep and thick cover layer and a spandrel concrete gravity dam structure. The method includes the steps that dynamic compaction processing and consolidation grouting processing are carried out on the deep and thick cover layer (3), an arched-type concrete base (1) is arranged on the processed deep and thick cover layer (3), and the arch ends of the arched-type concrete base (1) are arranged on bedrock (4) of two shores; and the gravity dam (2) is arranged on the arched-type concrete base (1), the gravity dam (2) and the arched-type concrete base (1) are integrally grouted, and no structural joint is formed. According to the method and the spandrel concrete gravity dam structure, as the two arch ends of the arched-type concrete base are supported on the bedrock of the two shores, the structural stress is supported to the bedrock at the two ends through an arch span; and as a skewback and an upper dam body are connected into a whole, the anti-sliding stability requirement is met through the resistance supplied through foundation surfaces at the two ends and the arch ends at the bottom.

Description

technical field [0001] The invention relates to the technical field of water-retaining buildings in water conservancy and hydropower projects, in particular to a method for building a gravity dam on a deep covering layer and an arched concrete gravity dam structure. Background technique [0002] In the construction of water conservancy and hydropower projects, the gravity dam is a common and very important hydraulic structure. Usually, the foundation surface at the bottom provides the anti-sliding stability of the entire dam body. Due to the constraints of topography, geology and overall engineering layout, the dam foundation often has a relatively deep covering layer, and the construction of a gravity dam with a deep covering layer often cannot meet the bearing capacity and anti-sliding stability requirements. Even if the requirements can be met through excavation or foundation treatment, the project cost is high. The technical difficulty is extremely high. Contents of th...

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Problems solved by technology

Due to the constraints of topography, geology and overall engineering layout, the dam foundation often has a relatively deep covering layer, and the construction of a gravity dam with a deep covering layer often cannot meet the bearing capacity and anti-sliding stability requirements. Even if the requirements can be met through excavation or foundation treatment, the project cost is high. Extremely technically difficult

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