点此下载全文Long-term dam safety monitoring of Punt dal Gall arch dam in Switzerland
Authors：M. WIELAND , G.F. KIRCHEN
Department: Poyry Energy Ltd., Hardturmstrasse 161, Zurich CH-8037, Switzerland；Engadiner Kraftwerke AG, Zernez CH-7530, Switzerland
Journal：Frontiers of Structural and Civil Engineering
Volumes：2012, 6(1)
Date： Mar 2012
Page number：76-83
Key words：dam safety concept, arch dam, dam instrumentation, dam safety monitoring
Abstract：The 130m high Punt dal Gall dam is located at the Swiss-Italian border in the South-eastern part of Switzerland and was completed in 1969. The dam is founded on highly folded and partially crushed dolomite and limestone formations. A grout curtain with an area of 120,000m2 was provided for controlling seepage. For the monitoring of the dam deformations five inverted pendulums were installed in the dam and three in the rock foundation of the right abutment outside of the dam.For a seasonal water level fluctuation in the reservoir of about 60 m the maximum amplitude of the radial displacement is 25 mm, which includes both the effects of the water load and temperature effects. Furthermore a comprehensive geodetic network was established, 57 joint meters were installed and cracks in the crest gallery are monitored by crack meters. There are also thermometers, piezometers and rocmeters. Springs at the left and right banks of the dam are monitored and chemical analyses of the seepage water and springs are performed regularly.The dam is equipped with strong motion instruments and several near-field earthquakes have been recorded in the past. The paper describes the long-term safety monitoring of this 42 years old arch dam. A short description of the Swiss practice in dam safety monitoring and emergency planning is also given.
《结构与土木工程前沿杂志》刊登:在瑞士的 Punt dal Gall 拱坝的长期安全监测
作者: M. WIELAND , G.F. KIRCHEN
刊物：结构与土木工程前沿杂志
期刊号：2012, 6(1)
时间：2012年3月
页码：76-83
关键词：大坝安全的概念，拱坝，大坝设备，大坝安全监测
摘要：130m高的Punt dal Gall坝坐落在瑞士东南部和意大利交界处，建成于1969年。这个大坝建在高度折叠和部分粉碎的白云岩和石灰岩地基上。渗流控制是靠一个12万平方米的灌浆帷幕。在大坝中安装了5个倒立摆，在大坝右坝肩的岩石地基中安装了3个倒立摆，用来监测大坝的变形。对于水库中季节性水位波动的大约60m的位置，最大的径向位移为25mm，其中既包含了水荷载的影响又包含了温度的影响。此外，建立了全面的地面监测网。还有温度计、压力计等。定期监测大坝左右岸的渗水，定期进行渗漏水的化学分析以及渗水量分析。大坝安装了强震仪，过去的一些距离较近的地震也留有记录。本文介绍了这个建成42年拱坝的长期安全监测。简短的介绍了在大坝安全监测和应急处理方面瑞士的做法。
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