A prefabricated concrete gravity dam based on a superimposed structure and its construction method

Abstract

The invention relates to a prefabricated concrete gravity dam based on a superimposed structure and a construction method thereof, belonging to the technical field of water conservancy engineering. The dam body of the present invention is mainly formed by pouring superimposed structure concrete, and the upstream concrete face plate and the downstream concrete face plate are poured on the upstream and downstream sides of the dam body; Composite structural concrete. The composite structural concrete is composed of precast concrete components and post-cast concrete in the precast concrete components. The post-cast concrete is connected to each other to form a space frame structure system and enhance the stability of the dam. The invention can make full use of the advantages of reliable quality of prefabricated concrete components, reducing temperature cracks in the dam body, and high construction efficiency; at the same time, the space frame structure system formed by post-cast concrete can improve the integrity and stability of the dam body, ensuring Dam safety.

Description

technical field [0001] The invention relates to a prefabricated concrete gravity dam based on a superimposed structure and a construction method thereof, belonging to the technical field of water conservancy engineering. Background technique [0002] Traditional gravity dams are built by cast-in-place concrete. Since the cement emits a large amount of heat of hydration during the hydration process, it is easy to cause cracks in the concrete when there is a large temperature difference between the large-volume concrete and the external environment. , thus destroying the integrity of the concrete and affecting the safety of the dam. In order to prevent such temperature cracks, not only artificial cooling, cooling, heat dissipation and other measures must be taken during construction, but also block and layer pouring must be adopted. The interval between two layers of pouring needs 5~10 days or longer , thus seriously affecting the construction speed. Due to the limited const...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of strict temperature control and easy occurrence of temperature cracks in the construction of traditional gravity dams; long curing time is required for cast-in-place concrete, the construction speed is affected by the environment, and the dam building speed is low; the dam cannot be built in a short time. In order to achieve the function of water retaining or flood discharge, the cost of diversion is greatly increased, and a prefabricated concrete gravity dam based on a composite structure and its construction method are proposed.

This type of dam can make full use of the advantages of reliable quality and high construction efficiency of prefabricated concrete components and the advantages of good integrity and good seismic performance of cast-in-place concrete components, and fundamentally solve the problems of high-gravity dams that are prone to temperature cracks and low construction speed problems, providing a new approach for the construction of concrete gravity dams

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