MICP-纤维协同固化砂土力学性能的研究进展

Research Progress on Mechanical Properties of MICP-fiber Treated Reinforced Sand

近年来有学者将MICP技术与纤维加筋技术相结合应用于岩土工程中,取得了较好的效果。文中基于前人的研究,通过数据无量纲化,归纳总结了纤维含量对MICP-纤维协同固化砂土抗压强度、抗拉强度、脆性指数和渗透系数等材料性能的影响。纤维含量在0.2%~0.3%之间时,可以最大程度提高固化体抗压强度;随着纤维含量的增加,固化体的抗拉强度和破坏应变呈线性增加;纤维的掺加可以有效地降低固化体脆性指数,最高可降低3个数量级。

In recent years,some scholars have applied micp technology and fiber reinforcement technology to geotechnical engineering and achieved good results.Based on previous studies and dimensionless data,this paper summarizes the effects of fiber content on the compressive strength,tensile strength,brittleness index and permeability coefficient of micp Fiber Co solidified sand.When the fiber content is between 0.2%〜0.3%,the compressive strength of the cured body can be improved to the greatest extent;With the increase of fiber content,the tensile strength and failure strain of the cured body increase linearly;The addition of fiber can effectively reduce the brittleness index of solidified body,which can be reduced by up to 3 orders of magnitude.