RCC quality control applied in the structures of 1 st and 2nd construction stages of the HPP Tucurui

机译：RCC质量控制应用于HPP Tucurui的第一和第二施工阶段的结构

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The Tucurui hydroelectric power station is located on the Tocantins river, upstream from the town of Tucurui, and 300 km from Belem, capital city of Para State, in the North area of Brazil, in the middle of the Amazon rainforest. The main aim of the project is power generation. The work was planned to be built in two stages. The first construction stage of the dam was finished in December 1992, with twelve units of 350 MW and two additional units of 22.5 MW, making the total installed capacity of 4245 MW. The second stage, began in June 1998, it consists of eleven more 375 MW generation units with the addition of 4125 MW of capacity. When finished off in 2006, the power plant will have a total installed capacity of 8370 MW, making it one of the largest hydroelec-trie of the world. Up to February 2003, the total volume of concrete placement in the two construction stages is about 7,970,000 m~3. Part of the concrete volume was the Roller Compacted Concrete (RCC), applied in the structures of the Water Intakes and Shiplock and controlled according to the knowledge and the technology developed at that time of each construction stage. The paper presents the quality control carried out in each stage, being made an identification of structures where the RCC was applied. Soon afterwards, the control is approached as it was practiced in the field, it comprises the Production Control, Placement Control and Technological Control. The Concrete Production Control, the explanation is set out to the tests of moisture of aggregates and concrete, workability and specific gravity of the concrete, with emphasis on the last one, in the relative description to the second construction stage. The Concrete Placement Control to point out the cares adopted in the RCC mix proportions, construction joints, thickness lift, compaction of the RCC along its interface with the conventional concrete facing, the determination of the compaction ratio and, curing and weather protection of the lift joint. The Technological Control with the tests results of compressive and tensile strength as well as, some permeability tests are presented and analyzed. After the account of the quality control carried out in the two construction stages, are made the comments point to the differences and the relevant points among them. Finally, some conclusions are drawn regarding the obtained results.

机译：Tucurui水电站位于Tocantins河上，位于Tucurui镇的上游，距巴西北部帕拉州首府贝拉母贝伦300公里，位于亚马逊雨林中。该项目的主要目的是发电。这项工作计划分两个阶段进行。大坝的第一期建设阶段于1992年12月完成，有12台350兆瓦的机组和另外2台22.5 MW的机组，使总装机容量为4245 MW。第二阶段始于1998年6月，包括11台以上的375 MW发电机组以及4125 MW的容量。到2006年完工后，该发电厂的总装机容量将达到8370 MW，使其成为世界上最大的水力发电设备之一。截止到2003年2月，两个施工阶段的混凝土浇筑总量约为797万立方米。混凝土体积的一部分是碾压混凝土（RCC），它被应用在取水口和船闸的结构中，并根据每个施工阶段当时的知识和技术进行控制。本文介绍了在每个阶段进行的质量控制，并确定了应用RCC的结构。此后不久，便开始按照现场实践进行控制，包括生产控制，布局控制和技术控制。在《混凝土生产控制》中，对集料和混凝土的水分，混凝土的可加工性和比重的测试进行了解释，在对第二个施工阶段的相对描述中，重点是最后一个。混凝土浇筑控制指出RCC的配合比，施工缝，厚度提升，沿RCC与传统混凝土面板的接触面进行压实，确定压实比以及提升的养护和耐候性联合。提出并分析了具有抗压强度和抗拉强度测试结果的技术控制以及一些渗透性测试。在考虑了两个施工阶段的质量控制之后，提出意见，指出其中的差异和相关要点。最后，针对所获得的结果得出了一些结论。

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《Forth International Symposium on Roller Compacted Concrete (RCC) Dams; Nov 17-19, 2003; Madrid, Spain》|2003年|p.959-968|共10页
会议地点 Madrid(ES);Madrid(ES)
作者
H.R. Gama; O.M. Bandeira; S.S. Lacerda;
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作者单位

Electronorte, EEGE, Brazil;

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原文格式 PDF
正文语种 eng
中图分类水利工程;
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RCC quality control applied in the structures of 1 st and 2nd construction stages of the HPP Tucurui

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