钢筋桩在软地基重力坝深层抗滑稳定分析中的应用

Application of Reinforced Concrete Piles in Deep-Sliding Stability Analysis for Soft Ground Gravity Dam

以某水利工程重力坝靠近右岸岸坡的7号坝段深层抗滑稳定分析为例,由于坝段建基面为弱风化黏土岩,承载力和抗滑稳定参数较低,为了满足该坝段的承载力和稳定要求,对比采用下挖齿槽和钢筋桩等工程措施,提出上游扩挖齿槽方案、上游扩挖齿槽+钢筋桩处理方案和钢筋桩方案。结果表明,两种方案均能够满足稳定要求。从处理效果、施工工艺、经济性和处理耗时等方面综合比较,钢筋桩处理方案施工工艺简单,技术成熟可靠,工期短,处理效果好,处理费用相对较低。最终选定采用钢筋桩处理方案,以期为软地基重力坝抗滑稳定分析提供参考与借鉴。

Taking the anti-sliding stability analysis of the 7 # dam section of the gravity dam near the right bank of a water conservancy project as an example, since the foundation of the dam section is weakly weathered clay rock, the bearing capacity and anti-sliding stability parameters are low, in order to meet the bearing capacity of the dam section. For the force and stability requirements, the engineering measures such as the undercut cogging and the steel bar are adopted. The upstream expansion cogging scheme, the upstream expansion cogging steel pile treatment scheme and the steel pile scheme are proposed. The results show that both schemes can meet the stability requirements. From the aspects of treatment effect, construction process, economy and time-consuming treatment, the construction method of steel bar pile treatment scheme is simple, the technology is mature and reliable, the construction period is short, the treatment effect is good, the treatment cost is relatively low, and the steel pile treatment scheme is finally recommended. It provides a reference for the anti-sliding stability analysis of soft foundation gravity dam.