Abstract
In order to make full use of the concrete strength, reduce the amount of cementitious materials and simplify the temperature control measures, a roller compacted concrete (RCC) dam needs to be zoned reasonably in consideration of locations and working conditions. Taking the RCC gravity dam of Wuxikou hydropower project in Jiangxi province, this article specifies the zonation design, the problems encountered during construction stage and the corresponding measures. The results indicate that the zonation and the construction schemes of the RCC gravity dam can greatly reduce the amount of cementitious materials, improve the level of mechanization in construction, and thus accelerate the construction progress, reduce the project cost. It not only ensures the quality and safety of the project, but also achieves obvious economic benefits. It can be an important reference for zonation design and construction of similar projects.
Highlights
Overview of the caseWith the 2#Graded Aggregate, Impermeability Grade W6, and Frost Resistance Grade F50
The problems encountered in the construction of the different zones of the roller compacted concrete (RCC) dam and its effective solutions are rarely reported.Taking the WUXIKOU hydropower project in Jiangxi Province as an example, this paper focuses on the zoning of RCC gravity dam section, concrete mix proportion, construction problems and their solutions
The main conclusions are listed as follows: (1) The zoning of a RCC dam should be made according to the design codes and regulations, as well as its own characteristics and the needs of the construction
Summary
With the 2#Graded Aggregate, Impermeability Grade W6, and Frost Resistance Grade F50 The thickness of this anti-seepage concrete is determined according to the Concrete Gravity Dam Design Code (319-2005 SL) [14] , which is 1/30 ~ 1/15 of the upstream water head,and meets the minimum thickness requirements for the construction. (3) The inner part of the dam is designed to Zone III In this zone, the concrete strength and the anti-seepage requirement is relatively low, so use the R90150 RCC concrete with the 3# Graded Aggregate, Impermeability Grade W6. (5) In order to produce a good appearance and ensure anti-seepage performance, the upstream and downstream face of the dam is designed to be Zone V, at the thickness of 0.5 m, using the R90200 Grout Enriched RCC (GE-RCC) ( Impermeability Grade W6 and Frost Resistance Grade F50).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
