景洪水电站二期围堰设计及施工

Design and Construction of Two Cofferdam of Jinghong Hydropower Station

景洪水电站二期围堰挡水水头高,防渗形式及其与岸坡的连接复杂。二期围堰从设计到施工、截流到加高填筑以及堰基高喷防渗墙施工,堰体复合土工膜心墙施工等都经过试验研究和论证,施工过程中严格按照试验成果实施,从而使围堰的运行达到了预期的效果。景洪水电站二期围堰施工方法和防渗结构设计具有推广价值。

Jinghong Hydropower Station 2 cofferdam, and prior to the closure of the closure of hydraulic model tests, high-production cut-off wall of spray test, Weir of RCC test, but has also carried out on the weir downstream cofferdam of the stability analysis.Heightening of filling in the weir, a core composite geomembrane material testing, before laying geomembrane composite membrane with the membrane, the membrane and PVC Zhengshuidai thermal welding, bonding, stitching and other production test.2 cofferdam retaining head high, impervious form and the connection with the bank complex, and, two cofferdam from design to construction, reclamation and closure to the weir will be heightened by high jet-cut-off wall construction, Weir Composite Geomembrane heart wall construction, such as a certain representation, the procedures have been pilot research and demonstration, the construction process and the implementation of strict accordance with the test results, the cofferdam operation achieved the expected resultsm.Therefore, the Jinghong Hydropower Station 2 cofferdam construction is a more comprehensive and complete projects worth in the future other similar hydropower project and learn from.