出山店水库土石坝段地基沉降及处理方案有限元分析

发布时间：2018-03-25 17:34

本文选题：土石坝　切入点：沉降　出处：《华北水利水电大学》2016年硕士论文

【摘要】：河南省出山店水库是淮河干流上的大型防洪控制工程,是多次淮河流域规划中列为淮干上游的唯一一座防洪控制工程。是一座以防洪为主、结合供水、灌溉、兼顾发电等综合利用的大型水利枢纽工程。由于出山店土坝段坝线较长,其间跨越了多处岩性不同甚至工程性质差异较大的地基,在这种情况下坝体及地基很可能发生较大的沉降及不均匀沉降,导致心墙撕裂甚至整个坝体的破坏。因此研究其地基沉降,对于整个工程进度、工程质量都有重大意义。针对出山店土石坝段地基沉降问题,本文采用e-p曲线及非线性转化为弹性公式初步计算施工期沉降量,用有限元法借助ANSYS软件进行三维有限元建模计算,三者相互校核。结果均显示,沉降量过大,不满足设计要求,必须采取相应的措施。根据整体地基性质,本文模拟挤密砂桩复合地基,再次利用ANSYS计算运行期沉降量,沉降量在允许范围内,证明该方案可行。通过本文的计算研究,为以后沉降计算及处理方案提供了依据和经验。
[Abstract]:The Qiongshandian Reservoir in Henan Province is a large-scale flood control project on the main stream of the Huaihe River. It is the only flood control project listed as the upstream of the Huaihe River Basin in many times. It is a flood control project, which is mainly composed of flood control, combined with water supply and irrigation. Considering the comprehensive utilization of power generation and other large-scale water conservancy projects. Due to the long dam line in the earth-dam section of Qiongshandian, there are many foundations that have different lithology or even engineering properties. In this case, large settlement and uneven settlement are likely to occur in the dam body and foundation, resulting in tear of the core wall and even destruction of the whole dam body. The quality of the project is of great significance. In view of the settlement of the foundation in the earth-rock dam section of Qiongshandian, this paper uses the e-p curve and the nonlinear transformation to the elastic formula to calculate the settlement during the construction period. The finite element method is used to carry out 3D finite element modeling and calculation with ANSYS software. The results show that the settlement is too large and does not meet the design requirements, and corresponding measures must be taken according to the properties of the whole foundation. This paper simulates the compacted sand pile composite foundation and calculates the settlement of the compacted sand pile during operation by using ANSYS again. The settlement is within the allowable range, which proves that the scheme is feasible. Through the calculation and study in this paper, it provides the basis and experience for the settlement calculation and treatment scheme in the future.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV223

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