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三峡围堰是三峡水利枢纽的关键工程之一、从1984年起,我室即开始了三峡工程围堰的土工应力,应变非线性有限元分析。本文是在前阶段计算分析的基础上,采用一种新型的防渗心墙材料作为堰体防渗材料的可行性研究成果。初步计算表明,采用这种新型“柔性材料”,可大大降低防渗墙内的应力值。这种材料的研究正在逐步深入开展,因此,本文仅为初步研究成果,更准确的计算尚有待于具体的断面型式,边界条件及材料指标的最终选定。
The Three Gorges cofferdam is one of the key projects of the Three Gorges Project. Since 1984, our laboratory has commenced the soil stress and strain nonlinear finite element analysis of the Three Gorges Project cofferdam. Based on the calculation and analysis of the previous stage, this paper adopts a new type of impervious core wall material as a feasibility study of weir impermeable material. Preliminary calculations show that using this new “flexible material” can greatly reduce the stress within the cut-off wall. Therefore, this article is only preliminary research results. More accurate calculation is still subject to the final selection of specific cross-section types, boundary conditions and material indexes.