[关键词]
[摘要]
基于达西定律, 采用稳态水流测量方法探讨了塑性混凝土在荷载不变和荷载逐渐提高两种条件下的渗透性 能, 及其随荷载和自身内部裂隙变化的规律。研究发现, 荷载不变且不产生破坏时, 塑性混凝土的渗透系数基本保 持稳定; 当荷载逐渐增大直至塑性混凝土破坏, 渗透系数在应力比G小于30%时略有降低, 在G为30%~ 60%之间 时明显减小, 在G 大于60%时开始增加, 当G 达到80%之后显著增加。
[Key word]
[Abstract]
Permeabilit y of plastic co ncr et e under the t wo co nditions, including the same load level and increasing load level with time, w as investig ated using the steady state flow measurement method based on Dar cy. s Law , and t he relationships betw een the permeability and lo ad and betw een the permeability and inter na l crack wer e analyzed. T he r esults show ed that w hen load is co nstant and the plastic concrete sample is not destro yed, t he permeabilit y coefficient remains stable; while load increases step by step until the sample is destroyed, the permeability coefficient reduces slightly when stress ratio ( G) is less than 30%, reduces signifi2 cantly when G is between 30% to 60%, beg ins to increase when G is g reater than 60%, and increases r emar kably w hen G reaches 80%.
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[基金项目]
国家863 计划/ 重大环境污染事件应急技术系统研究开发与应用示范0 重大项目/ 重大环境污染事件污染场地净化与修复技术0 课题( 2007AA06A410)