A concrete face rockfill dam face split structure and its construction method

Abstract

The invention discloses a panel joint structure for a concrete panel rockfill dam and a construction method of the panel joint structure, and belongs to the technical field of hydraulic engineering. The panel joint structure comprises a concrete panel and concrete toe boards, wherein the concrete toe boards are positioned on the lower edge of the concrete panel; the concrete panel is provided with a plurality of joints which are longitudinally distributed along the concrete panel; the joints comprise vertical extrusion joints and vertical tension joints; the vertical extrusion joints are formed in the middle section of the concrete panel; the vertical tension joints are formed in two ends of the concrete panel. The construction method comprises the following steps: determining the length of a compressive zone; determining longitudinal displacement; calculating the widths of the joints; calculating the quantity of the joints; processing the joints. According to the technical scheme, the panel joints on the concrete panel rockfill dam are scientifically and reasonably calculated; due to the allowable sum of elastic deformation widths, the joints between the panels adapt to longitudinal displacement of the dam, so that extrusion between anti-seepage panels of the concrete rockfill dam is avoided, and the effect of effectively avoiding extrusion damage between the panels is achieved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and relates to a concrete face structure of a water conservancy project dam, in particular to a face split structure of a concrete face rockfill dam and a construction method thereof. Background technique [0002] In modern water conservancy projects, concrete face rockfill dams are one of the most commonly used types of barrage dams in modern water conservancy projects. The seepage retains water, and the rockfill body is used to bear the water pressure. Therefore, the concrete face is the core structure of this type of dam. However, during the operation of the face rockfill dam projects that have been built at home and abroad, it was found that the concrete face panels of many projects were squeezed each other due to improper joints between the face plates, and even caused the face plates to be damaged, resulting in serious problems. Large economic losses, and bring greate...

AI Technical Summary

Problems solved by technology

However, during the operation of the face rockfill dam projects that have been built at home and abroad, it was found that the concrete face panels of many projects were squeezed each other due to improper joints between the face plates, and even caused the face plates to be damaged, resulting in serious problems. Large economic losses, and brought greater safety hazards to the project, which has aroused the attention of the water conservancy engineering field

The reason is that the importance of the joint structure between the panels is not clearly understood. The joints between the panels are only based on the consideration of construction technology, and there are no special requirements and special treatment for the width of the joints. When the two sides of the dam When the displacement occurs along the dam axis (hereinafter referred to as the longitudinal displacement), the panel will be subjected to extrusion force. When the displacement value reaches a certain level, when the stress in the concrete panel exceeds the strength of the concrete, the concrete panel will be crushed and damaged.

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