摘要
水库会因施工处理不当、填筑标准低、大坝及堤防工程建设失控等不利因素而引发系列安全问题,造成大坝及堤防渗漏、坝体裂缝、坝体渗流等。因此,探讨综合考虑渗流、变形等稳定性分析方法具有重要的理论意义和工程实用价值。以龙坑口水库为例,采用Geo-Studio软件中SEEP/W进行大坝渗流分析,同时采用SLOPE/W程序中4种不同的极限平衡边坡稳定性方法,对大坝上下游边坡进行稳定性分析。结果表明,在稳态条件下,浸润线穿过下游斜坡处的坝体不与下游面相交,因此不会导致下游边坡软化或坍塌而导致后续破坏。此外,Janbu法在上游和下游边坡中产生的安全系数最低,而Bishop方法在上游和下游边坡中产生的安全系数最高,但所有获得的安全系数值均高于1,预计不会出现边坡破坏。
The reservoir will cause a series of safety problems due to unfavorable factors such as improper construction treatment, low filling standards, uncontrolled dam and embankment construction, resulting in dam and embankment leakage, dam cracks, dam seepage and other events. Therefore, it is of great theoretical significance and practical value to discuss the stability analysis methods that comprehensively consider seepage, deformation and so on. Taking Longkengkou reservoir as an example, SEEP/W dam in Geo-Studio software is used for seepage analysis, and four different limit equilibrium slope stability methods in SLOPE/W program are used to analyze the upstream and downstream slope stability of the dam. The results show that under steady-state conditions, the dam body where the phreatic line passes through the downstream slope does not intersect with the downstream surface, so it will not cause the downstream slope to soften or collapse, resulting in subsequent damage. In addition, the Janbu method produces the lowest safety factor in the upstream and downstream slopes, while the Bishop method produces the highest safety factor in the upstream and downstream slopes. However, all the safety factor values obtained are higher than 1, and it is expected that no slope damage will occur.
作者
陈景辉
CHEN Jing-hui(Shuikou Town Agricultural Comprehensive Service Center,Kaiping 529300,Guangdong,China)
出处
《水利科技与经济》
2023年第1期68-72,76,共6页
Water Conservancy Science and Technology and Economy
