峡江水利枢纽工程典型泄水闸段抗滑稳定及加固措施研究

采用Sarma法对峡江水利枢纽工程12#闸墩段闸基稳定性进行抗滑稳定分析。计算结果表明现有设计条件下12#闸段抗滑稳定系数不满足规范要求。为此,结合工程特点提出两种加固措施,一是底板加厚方案,二是布置系统锚筋桩方案,经计算,闸基经过加固后均能满足规范要求。从施工难度考虑,推荐加厚方案作为12#闸墩段抗滑加固方案,但综合考虑施工布置及施工进度影响后,锚筋桩方案也可作为一可行的加固方案。

Study on anti-sliding stability of typical discharge sluice section of Xiajiang Water Control Project and its reinforcement measures

The anti-sliding stability analysis on the stability of the foundation of the section of the No.12 sluice-pier for Xiajiang Water Control Project is made with Sarma method. The calculation result shows that the coefficients of anti-sliding stability of the section of the No.12 sluice-pier cannot meet the requirements of the relevant specification under the existing design condition. Therefore，two kinds of reinforcement measures are proposed according to the characteristics of the project，i.e. one is the scheme of thickening the bottom slab and the other is the scheme of arranging systematic anchor piles； for which the sluice foundation can meet the requirements of the relevant specification after the reinforcement made by both reinforcement schemes. Under the consideration of the construction difficulties，the thickening scheme is recommended as the anti-sliding reinforcement scheme for the No.12 sluice-pier，however，the anchor pile scheme can also be taken as a feasible reinforcement scheme for it after the comprehensive consideration of the impacts from both the construction layout and the construction progress.