冻融作用对微生物固化裸土抗风蚀扬尘性能影响的研究进展

Research Progress on Effects of Freeze-Thaw Action on Wind Erosion and Dust Resistance of Microbial Cured Bare Soil

微生物诱导碳酸钙沉淀(MICP)改良土的技术,是一种保护生态环境、抗风蚀扬尘的新方法。通过对MICP固化裸土抗风蚀扬尘机理及固化方法的总结,系统分析了固化条件和环境因素对MICP固化裸土抗风蚀扬尘的影响。现有研究表明:冻融作用对MICP固化土体稳定性和物理力学性质的影响,显著增大了裸土的可蚀性。基于上述研究,指出了研究冻融循环对MICP固化裸土抗风蚀扬尘的必要性;最后,提出了微生物固化裸土抗冻融耐久性的研究是MICP技术固土抗风蚀扬尘理论基础的观点。

Microbial Induced Calcium Carbonate Precipitation(MICP)technique is a new method to improve wind erosion and dust resistance of bare soil and protect the ecological environment.The reinforcing mechanisms and curing methods for bare soil cemented by MICP to improve its properties of wind erosion and dust resistance were summarized.The effects of cured conditions and environmental factors on wind erosion and dust resistance of bare soil cemented by MICP were systematically analyzed.The existing findings indicated that freeze-thaw action influenced on the structural stability and physical and mechanical properties of bare soil cemented by MICP,which deteriorated the wind erosion and dust resistance of soil.Therefore,the necessity to study the effects of freeze-thaw action on wind erosion and dust resistance of bare soil cemented by MICP were presented.Finally,it was pointed out that durability study on freeze-thaw resistance of bare soil cemented by MICP was the theoretical base of stabilizing soil and improving wind erosion and dust resistance.