彭水大坝诱导缝长度敏感性分析

Sensitivity Analysis of Inductive Slot Length of Pengshui Dam

为研究RCC大坝并块浇筑设计中设置诱导缝长度的合理范围,通过模拟大坝建造过程的三维有限元仿真计算,对上、下游诱导缝不同长度设置方案诱导缝的设置效果进行了对比分析。结果表明:大坝诱导缝设置长度应具有一合理的范围,过长、过短都对坝体受力状况不利。彭水大坝上游诱导缝长度取3m,下游诱导缝长度取3m或适当延长对坝体受力更有利。

For determining a reasonable length of inductive slot used in the blocking design of a RCC dam, a calculation and contrast research was performed through analysing the effects of inductive slots with different lengths, which are set at the upstream and downstream between two pouring blocks, and by using 3-D FEM simulating the dam construcion process. The results indicated there exists a reasonable size of inductive slot for avoiding to emerge cracks on the upstream and downstream surfaces of the dam, concretely, for this project, 3-meter-long inductive slot and 3-meter-long or suitably longer than this size should be set between two pouring blocks in the upstream and downstream of the dam respectively, and then, it would be more available for improving stress state inside the dam.