升船机上闸首抗滑稳定处理与研究

Treatment and Study on Stability Against Sliding in Upper Lock Head of Shiplift

升船机上闸首兼有挡水坝坝段及升船机闸首的双重功能,区内地质构造和基础开挖形态复杂,坝区规模最大的F23断层与性状最差F215断层组在上闸首交汇,倾下游的长大缓倾角结构面发育,存在抗滑稳定、基础变形与渗漏问题。通过"特殊勘察"方法和施工期详细编录,查清上闸首地质构造条件,对上闸首存在的主要工程地质问题进行综述与分析。通过对上闸首建基面岩体采用一系列的综合加固措施,提高了上闸首的抗滑安全裕度。

Upper lock head of shiplift has double functions as water retaining dam section and lock head of shiplift. Geological structure and foundation excavation pattern is complicated in this region, F23 fault of the largest scale and F215 fault of the worst properties meets in upper lock head, group with worst properties in upper lock head, the long and large lowly inclined structural surface inclined to downstream develops and in the dam area exists problems of stability anti-slide ,foundation deformation and leakage. Based on ＂special survey＂ method and detailed geological record in construction period, geological structure conditions of upper lock head has been cleared up, and the main engineering geologic issues existed in upper lock head are summarized and analyzed in the paper. It improves the safety margin of anti-slide in upper lock head through adopting a series of comprehensive reinforcement treatment in foundation rock mass in upper lock head.