垃圾渗滤液腐蚀作用对砂岩孔隙度的影响研究

Study on the effect of landfill leachate corrosion on the porosity of sandstone

地下工程往往面临复杂的环境,腐蚀作用对隧道围岩的破坏越来越引起人们的关注。本文实地取样垃圾渗滤液,分析其化学成分,并以此为基准配置纯水溶液、低浓度垃圾渗滤液和高浓度垃圾渗滤液,研究砂岩试样的孔隙度变化。结果表明,砂岩试样在高浓度和低浓度垃圾渗滤液浸泡88天后,试样的孔隙度分别是纯水溶液浸泡下的1.44倍和1.32倍。

Underground engineering is often faced with complex environment,and the destruction of tunnel surrounding rock by corrosion has drawn more and more attention.In this paper,the landfill leachate was sampled on the spot,its chemical composition was analyzed,and the pure water solution,low concentration landfill leachate and high concentration landfill leachate were prepared on this basis to study the porosity change of sandstone sample.The results showed that the porosity of rock specimens soaked with high and low concentration landfill leachate for 88 days was 1.44 times and 1.32 times of that of pure water solution,respectively.