油污泥热解残渣改良新疆盐渍土回弹模量试验研究

Experimental Study on Resilience Modulus of Salinized Soil in Xinjiang Improved by Pyrolysis Residue of Oil Sludge

油污泥热解残渣的主要化学成分与粉煤灰相似,为研究残渣单独改良盐渍土的效果,通过人工配置氯与硫酸盐渍土的方式开展室内回弹模量试验研究,并分析较优掺配比。试验结果表明,改良盐渍土回弹模量随残渣掺量的增加呈现先增后降的规律,峰值出现在10%掺量处,因此选该掺量为较优掺配比;改良氯盐渍土的回弹模量随盐含量的增加呈现增长趋势,而改良硫酸盐渍土的回弹模量随盐含量的增加呈现先增大后降低再至平缓的趋势。将油污泥热解残渣用于改良盐渍土不仅能够满足路基回弹模量规范标准要求,且对盐渍土的回弹模量有大幅提升作用。残渣的利用还能解决目前其任意堆放所造成的环境污染问题,同时为改良和处治盐渍土路基提供一种新方式。

The main chemical composition of the pyrolysis residue of oil sludge is similar to fly ash.In order to study the improvement effect of the residue on saline soil alone,the laboratory resilience modulus test was carried out by artificial configuration of chlorine and sulfuric acid salinized soil and a better mixing ratio was analyzed.The test results show that the resilience modulus of improved saline soil increases first and then decreases with the increase of the residue content,and the peak value appears at 10%of the content,so the content should be a better proportion.The resilience modulus of modified chlorine saline soil increased with the increase of salt content,while the resilience modulus of modified sulfuric acid saline soil increased first and then decreased to a gentle trend.The application of the pyrolysis residue of oil sludge to the improvement of saline soil can not only meet the requirements of the norms and standards for the resilience modulus of the subgrade,but also greatly improve the resilience modulus of the saline soil.The utilization of residue can also solve the problem of environmental pollution caused by its arbitrary stacking at present,and provide a new way for improving and treating the saline soil roadbed.