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首页> 外文会议>Geotechnical Practice Publication no.2; Biennial Denver Geotechnical Symposium; 20041022; Denver,CO(US) >Pinery Dam Outlet Conduit Repair
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Pinery Dam Outlet Conduit Repair

机译：派尼里水坝出口管道维修

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The Pinery Dam (a.k.a. Bingham Lake Dam), located near Parker, Colorado, is a zoned embankment darn, over 50 feet (15.24 meters) high, constructed in the early 1970's. The Class 2 dam has a 350-foot (106.68-meter) long, 18-inch (45.7-cm) diameter, RCP (reinforced concrete pipe) outlet conduit with a reinforced concrete cradle. Leakage flows coming out of the existing outlet conduit were continuous and measured over 60 gpm (gallons per minute) (227 lpm (liters per minute)) with small amounts of embankment material. The source of the leakage problem became apparent when a remote-controlled video camera was able to view a 3-inch (7.6-cm) vertical offset at a pipe joint about 260 feet (79.25 meters) from the downstream end of the outlet conduit. Since draining the reservoir was to be avoided, any repair solution had to be performed either underwater on the upstream side or entirely from the downstream end of the outlet conduit. In 2002, a failed repair attempt was made using an inflated flexible-tube type lining set in place with epoxy resin from the downstream end. During this repair installation, the leakage flows and pressures caused the flexible-tube lining to be forced back out from the outlet conduit, ending in the repair failure. Several other repair alternatives were considered, but the final repair using a HDPE (high density polyethylene pipe) slip lining with grouting was selected. The HDPE slip lining solution was the least expensive alternative, but was risky, because of the leakage flows and the 260-foot (79.25-meter) distance to the 3-inch (7.6-cm) vertical offset in the 18-inch (45.7-cm) RCP. This selected repair solution required the use of an inflatable packer, remote-controlled video camera, and 12, 1-inch (2.54-cm) diameter grout lines at up to 300 feet (91.4 meters) long. In the annular space between the 14-inch (35.56-cm) HDPE and 18-inch (45.7cm) RCP, 12 individual grout cells were filled with non-shrink cementitious grout along the entire slip lining length. After the successful HDPE slip lining installation in 2003, the measured leakage flow was reduced to about 4.8 gpm (18.17 lpm) from the repaired outlet conduit.
机译：科罗拉多州派克市附近的Pinery大坝（又称宾厄姆湖大坝）是一个带状堤坝，高超过50英尺（15.24米），建于1970年代初期。 2级大坝的长度为350英尺（106.68米），直径为18英寸（45.7厘米），RCP（钢筋混凝土管）出口导管带有钢筋混凝土支架。来自现有出口管道的泄漏流是连续的，并以少量堤坝材料进行了超过60加仑/分钟（加仑/分钟）（227升/分钟（升/分钟））的测量。当遥控摄像机能够在距出口导管下游端约260英尺（79.25米）的管接头处观察到3英寸（7.6厘米）的垂直偏移时，泄漏问题的根源就变得显而易见。由于要避免排空储层，因此必须在水下在上游侧或完全从出口导管的下游端进行任何修复。在2002年，使用充气软管的衬里在下游端安装了环氧树脂，从而导致维修失败。在此维修安装过程中，泄漏流和压力导致软管衬套被迫从出口导管中抽出，从而导致维修失败。考虑了其他几种修复方法，但是选择了使用HDPE（高密度聚乙烯管）滑衬和灌浆的最终修复方法。 HDPE滑衬解决方案是最便宜的替代方案，但存在风险，因为存在泄漏流，并且距18英寸（45.7）的3英寸（7.6-cm）垂直偏移量为260英尺（79.25米）。 -cm）RCP。这种选择的维修解决方案需要使用充气式包装机，遥控摄像机和12条1英寸（2.54厘米）直径的灌浆线，最长可达300英尺（91.4米）长。在14英寸（35.56厘米）HDPE和18英寸（45.7厘米）RCP之间的环形空间中，沿整个滑衬长度，在12个独立的灌浆单元中填充了非收缩水泥浆。在2003年成功安装HDPE滑衬后，测得的泄漏流量从维修的出口导管减少到大约4.8 gpm（18.17 lpm）。

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