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叙尔文斯泰因土坝位于德国南部阿尔卑斯山区,建于1954～1959年间,坝高41m。大坝坝基覆盖层厚达100m,渗透性强,采用灌浆帷幕进行防渗。大坝心墙用经膨润土改良的砂砾石填筑。经过10年左右的运用,一些坝段的心墙渗漏增大,并于1972年进行了灌浆处理。进一步的观测显示,在其后的10年,心墙和坝基灌浆帷幕又重新出现了异常情况。现场勘查结果表明,大坝心墙水压差减小,认为是因心墙填筑材料的老化所致。本文还就修复措施作了介绍。
Sylvien Stein Earth Dam is located in the southern German Alps, built in 1954 ~ 1959, dam height 41m. Dam dam foundation cover thickness of 100m, permeability, the use of grouting curtain impermeable. Dam core wall by bentonite improved gravel fill. After about 10 years of operation, the core wall leakage of some dam sections increased and the grouting treatment was carried out in 1972. Further observations showed that in the following 10 years, abnormalities were re-emerged on the grouting curtain of the core and dam foundation. The site survey results show that the pressure drop of the dam core wall is reduced, which is believed to be caused by the aging of the core wall filling material. This article also introduced the repair measures.