A super-high rockfill dam structure suitable for water conservancy and hydropower projects and its construction method

Abstract

The invention provides a super-high rockfill dam structure suitable for water conservancy and hydropower engineering and a construction method of the dam structure. According to a super-high rockfill dam, lower layer concrete with the slump constant ranging from 70 mm to 150 mm is cast on a treated dam foundation, before the lower layer concrete is initially set, dimension stone or cobbles with the particle diameter above 40 mm are selected for piling up middle-layer dimension stone, first-grading roller compacted concrete with the VC value ranging from 1 s to 5 s is cast on the middle-layer dimension stone, and finally, rolling is carried out until even bleeding appears in the surface; then, the steps are repeated, and a rolling dimension stone concrete base with the height ranging from 90 m to 110 m is formed; and a concrete panel of 200 m to 300 m is constructed on the base for piling up a dam body, and finally, a concrete seepage-proofing panel is casted on the upstream portion of the whole dam body. According to the structure, local excavated materials can be fully used, the aim that no abandoned materials exist is basically achieved, and the dam structure is energy-saving, environment-friendly, low in cost and good in whole performance, improves the work efficiency and shortens the construction period.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering materials, structures and construction, in particular to an ultra-high rockfill dam structure suitable for water conservancy and hydropower engineering and a construction method thereof. Background technique [0002] Concrete face rockfill dam is one of the most competitive and promising dam types in dam construction. This dam type has many advantages such as low cost, high safety and strong adaptability, so it has been widely valued by the dam industry and has excellent application prospects. It is the preferred dam type for many projects. There are more than 150 face rockfill dams, of which 37 are over 100m. The development trend of modern concrete rockfill dams is that the dam is built higher and higher, and the scale of the project is getting larger and larger. Through the construction practice of Tianshengqiao Class I (maximum dam height 178m) and Shuibuy...

AI Technical Summary

Problems solved by technology

[0004] However, in the face of the construction goal of super-high rockfill dams of 300m or higher, there are still many key technical problems, such as the reasonable division of super-high rockfill dams, the influence of dam material properties on the deformation characteristics of dams, the superhigh The deformation characteristics and safety of rockfill dams, seismic safety and engineering measures, etc., especially when dams are built on the foundation of deep overburden, it is difficult to break through the limitation of dam height, which has become a technical bottleneck for the development of super high face rockfill dams

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