软弱地基上拱形围堰的光弹性研究

Photoelastic Study of an Arch Cofferdam on a Soft Foundation

介绍目前水利水电工程设计中常遇到的软弱地基上拱形围堰的光弹性试验研究.其中包括异弹模组合模型浇制与粘结、水砂压荷载模拟及主要试验成果. 文中分析了在上述荷载作用下拱堰的受力特点和工作状态,探讨了低弹模基础和边界条件不对称性对堰体内力的作用和影响,提出了进一步改善应力和稳定条件的途径和措施.

In this paper,a photoelastic stress analysis of an arch cofferdom on soft foundation and some problems, such as casting and binding the materials of different elastic moduli of a combined model, loading simulation and the major test results have been presented. Perfomances and stress states of the arch cofferdam under hydrostatic water load and silt pressure have been analyzed and the effect of low modulus foundation and asymmetry of the boundary conditions on the internal force in the cofferdam are discussed as well;in addition, the way and measures to further improve the conditions of stress and stability are pointed out.