不同改良剂对高液限土力学特性改良效果研究

Research on Improvement Effect of Different Modifiers on the Mechanical Properties of High Liquid Limit Soil

为了研究不同固化剂对高液限土力学特性的改良效果,选取了石灰、水泥和玄武岩纤维三种改良剂对高液限土进行改良,通过无侧限抗压强度试验和直剪试验,以无侧限抗压强度、抗剪强度、黏聚力、内摩擦角作为力学强度指标,研究三种改良剂对高液限土的改良效果。研究结果表明:三种改良剂均能够改善高液限土的力学性质;水泥掺量、石灰掺量与抗剪强度、黏聚力和无侧限抗压强度呈正比关系;玄武岩纤维掺量与抗剪强度、黏聚力和无侧限抗压强度呈现出先增大后减小的关系。

In order to study the improvement effect of different curing agents on the mechanical properties of high liquid limit soil,three kinds of modifiers like lime,cement and basalt fiber are selected to improve the high liquid limit soil.The improvement effect of three kinds of modifiers on the high liquid limit soil is studied with unconfined compressive strength,shear strength,cohesion and internal friction angle as mechanical strength indicators through the unconfined compressive strength test and direct shear test.The research results show that:three kinds of modifiers can improve the mechanical properties of high liquid limit soil;the cement content and lime content are in direct proportion to the shear strength,cohesion and unconfined compressive strength;the basalt fiber content and shear strength,cohesion and unconfined compressive strength show the relationship of first increasing and then decreasing.