镶嵌式面板堆石坝应力应变特性研究

沈婷; 李国英

doi:10.11779/CJGE2016S2044

镶嵌式面板堆石坝应力应变特性研究 English Version

沈婷,
李国英

南京水利科学研究院岩土工程研究所,江苏南京210024

详细信息

作者简介:
沈婷(1972- ),女,高级工程师,主要从事岩土工程数值分析方面的研究。E-mail: tshen@nhri.cn。

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出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Stress-strain characteristics of embedded concrete face rockfill dam

Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China

摘要

摘要: 镶嵌式面板坝是解决高面板堆石坝安全性的一种新理念,结合某150 m面板坝工程,采用非线性平面有限元方法,系统研究了新坝型与常规面板坝应力应变特性的差异,并探讨了混凝土坝高度、顶面宽度和坡比对镶嵌式面板坝应力应变的影响。结果表明,镶嵌式面板坝与常规面板坝在堆石坝体沉降、周边缝变位等方面并没有显著改变,改变主要集中在堆石体上游向变形和面板的应力应变上,镶嵌式面板坝对堆石体上游向变形有一定抑制作用,由于缩短了面板长度,对面板静态应力应变状况有所改善,但对面板动态应力状况稍有不利。混凝土坝高度是控制性体型参数,需综合考虑其对堆石坝体、面板和混凝土坝自身应力变形以及接缝变位的影响,合理选择混凝土坝坝高。
- 镶嵌式面板坝 /
- 常规面板坝 /
- 应力应变特性 /
- 有限元
Abstract: The embedded CFRD is a new idea to solve the safety of high CFRD. Combining a 150 m-CFRD project, the nonlinear finite element method is used to study differences in stress-strain characteristics of the new type CFRD and conventional CFRD. The influences of height, top width and slope of concrete dam on the stress-strain characteristics of the CFRD are studied. The results show that the embedded CFRD and conventional CFRD have no significant change in dam settlement and displacement of peripheral joints. The upstream deformation of rockfill and the stress-strain behavior of the face slab have-obvious change. The embedded CFRD has a certain inhibiting effect on the upstream deformation of the rockfill dam. Due to the shortening of the slab length, the static stress-strain condition of the face slab is improved, but the dynamic stress condition of the face slab has a slight disadvantage. The dam height is governing the shape parameter. Considering the influences of stress and displacement of rockfill dam, face slab and concrete dam, the height of concrete dam can be reasonably determined.
- embedded CFRD /
- conventional CFRD /
- stress-strain characteristic /
- FEM

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参考文献(7)

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