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首页> 外文会议>Dam safety 2004 >DESIGN, CONSTRUCTION, AND MONITORING OF THEUPSTREAM GEOMEMBRANE FACING SYSTEM FOR OLIVENHAIN RCCDAM
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DESIGN, CONSTRUCTION, AND MONITORING OF THEUPSTREAM GEOMEMBRANE FACING SYSTEM FOR OLIVENHAIN RCCDAM

机译：橄榄RCCDAM上游土工膜贴面系统的设计，施工和监测

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摘要

The Olivenhain Dam built for the San Diego County Water Authority (SDCWA) is the firstrnroller compacted concrete (RCC) gravity dam permitted by the State of California and, with arnheight of 318 feet (97 meters) and a RCC volume of 1.44 million cubic yards (1.1 million cubicrnmeters), is the tallest RCC dam in the United States. The primary design objective is for the damrnto survive a large seismic event remaining fully operational to provide an emergency supply ofrnwater to the San Diego region. To meet this objective, designers selected a flexible PVCrngeomembrane system for installation over the entire upstream face of the dam as one of itsrnprincipal design features. This represents the largest geomembrane facing system (412,150rnsquare feet) ever installed on a dam.rnThis paper discusses the selection, design, and construction of the upstream facing systemrnfor Olivenhain Dam. The selection process included evaluating 16 different upstream facingrnsystems that have been used worldwide for RCC dams. The geomembrane system wasrndetermined to be the highest rated upstream facing system based on a number of criteria includingrnseismic survivability, seepage control, constructability, appearance, durability and cost.rnKey features along with construction photographs of various elements of the waterproofingrngeomembrane system are presented and described. The two major changes made duringrnconstruction were scheduling of the membrane installation and the addition of a compartment sealrnabove the plinth. The benefits of these changes and other construction details are discussed.rnFinally, the overall performance and seepage results from monitoring during the filling ofrnthe reservoir are presented. At the time of this paper, the reservoir is 92% full by height (293rnfeet of the 318 foot dam height) and the seepage from the membrane system is about 1.27rngpm, which is less than 5% of the acceptance criteria of 35 gpm.
机译：为圣地亚哥县水务局（SDCWA）建造的Olivenhain大坝是加利福尼亚州允许的首个碾压混凝土（RCC）重力大坝，围墙高度为318英尺（97米），RCC量为144万立方码。 （110万立方米）是美国最高的RCC大坝。主要设计目标是使大坝能够在大型地震事件中幸存下来，并保持充分运转，以便为圣地亚哥地区提供应急供水。为了实现这一目标，设计人员选择了一种柔性的PVC土工膜系统作为其主要设计特征之一，以在大坝的整个上游面进行安装。这是有史以来安装在大坝上的最大的土工膜面板系统（412150平方英尺）。本文讨论了Olivenhain大坝上游面板系统的选择，设计和施工。选择过程包括评估已在全球范围内用于RCC大坝的16种不同的上游饰面系统。根据许多标准，包括抗震性，防渗性，可施工性，外观，耐用性和成本，将土工膜系统确定为最高评级的上游饰面系统。介绍并描述了防水土工膜系统的关键特征以及施工照片。在施工过程中进行的两个主要更改是膜安装的时间表和在基座上方增加了隔室密封。讨论了这些变化的好处以及其他施工细节。最后，介绍了储层充填过程中监测的总体性能和渗流结果。在本文撰写之时，水库的高度已达到92％（318英尺坝高的293rnfeet），膜系统的渗漏约为1.27rngpm，不到35 gpm接受标准的5％。

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