纤维掺量对季冻区改良粉质黏土力学性能的影响分析

Effect of Fiber Content on Mechanical Properties of Improved Silty Clay in Seasonal Frozen Area

为研究纤维掺量对季冻区改良粉质黏土动态回弹模量和无侧限抗压强度的影响,文中选用玄武岩纤维,采用合适掺量的水泥,通过室内试验研究不同纤维掺量下季冻区改良粉质黏土动态回弹模量和无侧限抗压强度变化,得到纤维掺量对季冻区改良粉质黏土动态回弹模量和无侧限抗压强度的影响。研究结果表明,适当的玄武岩纤维掺量能够较好地增强复合改良土的动态回弹模量和无侧限抗压强度,掺量较高或者较低其改良复合土的效果均不理想,其最佳纤维掺量为1.0%。

The influence of fiber content on the dynamic resilience modulus and unconfined compression strength of the improved silty clay in the seasonal frozen zone is analyzed.By selecting basalt fiber and the appropriate cement content,the variation law of dynamics resilience modulus and unconfined compression strength of silty clay in the seasonal frozen zone with different fiber content are studied through laboratory experiments.The influence of fiber content on the dynamic resilience modulus and unconfined compression strength of modified silty clay in seasonal frozen area is obtained.The research results show that the appropriate fiber content can better enhance the dynamic resilience modulus and unconfined compression strength of the composite modified soil,and the improvement effect with higher or lower fiber content of composite modified soil is not ideal,and the optimum fiber content of the composite modified soil mixed with basalt fiber is 1.0%.