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THE AUXILIARY MAKE-UP LAKE DAM - 20 YEARS LATER

机译：辅助补给湖-20年后

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In 1986, shortly after being built, the dam crest had to be regraded for its grand opening ceremony. The Auxiliary Make-Up Lake Dam, a 150 feet tall zoned earthen dam, had experienced substantial settlement of the crest and downstream bulges were readily visible. An extensive monitoring program was implemented coupled with a lowering of the reservoir to allow an evaluation of the condition of the embankment. This paper explores the numerous field explorations undertaken, the implemented monitoring programs along with documentation of the rehabilitation of the dam. It will also examine similar dam design practices in the Midwest.rnExhaustive slope stability analyses were performed for various rehabilitation schemes. The rehab scheme selected provided for excavating approximately 50% of the dam volume was excavated, placing the excavated materials in large stockpile areas for drying, and rebuilding the embankment to the same cross section and moisture/density specification requirements.rnDuring the excavation phase of the rehab, a fully instrumented test fill section was prepared and monitored to evaluate the relationships between moisture, density, and shear strength for the medium to highly plastic clays used in the embankment. Details and results of the test fill will be discussed in detail. The effects of high moisture content and the resulting lowering of the shear strength in the clays were evident.rnDuring the reconstruction, an extensive amount of instrumentation was installed at various locations throughout the dam. The Aux. Make-Up Lake Dam may well be one of the most highly instrumented dams in the USA.rnTwenty (20) years of post-construction monitoring and instrumentation data was reviewed. The data showed how the embankment responded to the different rehabilitation phases.
机译：1986年，坝顶刚建成不久，就不得不对其盛大的开幕式进行改建。辅助补给湖大坝是一个150英尺高的分区土坝，已经经历了波峰的大量沉降，下游隆起很容易看到。实施了广泛的监控程序，同时降低了水库，以评估路堤的状况。本文探讨了进行的大量野外勘探，已实施的监测计划以及大坝修复的文件。它还将研究中西部类似的大坝设计实践。针对各种修复方案进行了详尽的边坡稳定性分析。选择开挖的修复方案，以开挖大约50％的大坝体积，将开挖的材料放置在较大的储备区域进行干燥，然后将路堤重建为相同的横截面和水分/密度规格要求。修复后，准备并监测一个设备齐全的测试填充段，以评估路堤中使用的中至高塑性粘土的水分，密度和剪切强度之间的关系。将详细讨论测试填充的细节和结果。高含水量的影响以及由此引起的粘土抗剪强度的降低是显而易见的。在重建期间，在整个大坝的不同位置安装了大量的仪器。辅助。补给湖大坝很可能是美国仪器化程度最高的水坝之一。二十年（20）的施工后监测和仪器数据得到了回顾。数据显示路堤如何应对不同的恢复阶段。

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