官路水库穿坝涵洞地基处理和变形控制

Foundation Treatment and Deformation Control of Dam-crossing Culverts in Guanlu Reservoir

摘要:

文章在分析青岛市官路水库及其穿坝涵洞地质条件的基础上, 针对4处穿坝涵洞的地基承载力与变形控制问题,提出了造价经济、施工便捷的埋石混凝土基础处理方案。以泄洪放空洞为例,利用MIDAS GTS NX软件建立了穿坝涵洞、大坝和地基土层结合的三维有限元模型,采用增量法分步模拟计算了施工填筑与蓄水等各阶段的应力应变,验证了综合变形控制措施的有效性,揭示了穿坝涵洞竖向变形的分布规律,为类似工程设计提供参考。

Abstract:

Based on the geological conditions of Guanlu Reservoir and its dam-crossing culverts in Qingdao Municipality, this paper proposes a cost-effective and construction-convenient rubble concrete foundation treatment scheme to address the bearing capacity and deformation control issues of four dam-crossing culverts. Taking the flood discharge tunnel as an example, a three-dimensional finite element model integrating dam-crossing culverts, dam body and foundation soil layers is established by using MIDAS GTS NX software. The incremental method is adopted to simulate and calculate the stress and strain during construction filling, water impoundment and other stages step by step. The results verify the effectiveness of comprehensive deformation control measures and reveal the distribution law of vertical deformation of dam-crossing culverts, providing a reference for the design of similar projects.