冻融作用下工程渣土固化土长期力学特性研究

Study on Long-Term Mechanical Properties of Engineering Residue Solidified Soil Under Freeze-Thaw Cycles

土建开挖产生的工程渣土进行固化处理后应用于公路工程、市政工程建设具有较大的经济效益和社会效益。通过冻融试验、静力三轴试验和固结试验,分析了不同含水率和密度下的工程渣土固化土在不同冻融循环次数下黏聚力、内摩擦角和压缩模量的变化,揭示了上述力学指标随冻融次数的变化规律,并引入指标劣化系数用于评估工程渣土固化土的长期力学特性,建立了劣化系数计算方法。成果可为工程实践提供参考。

After solidified treatment,the engineering residue produced by civil construction excavation is applied to highway engineering and municipal engineering construction,which has great economic and social benefits.Through freeze-thaw test,static triaxial test and consolidation test,the effect on cohesion,internal friction angle and compression modulus of solidified soil with different moisture content and density under freeze-thaw coupling cycles are analyzed,The variation laws of the above mechanical indexes with the number of freeze-thaw cycles are revealed,and the deterioration degree of cohesion,internal friction angle and compression modulus are introduced to evaluate the long-term mechanical properties of engineering residue solidified soil,and the calculation method of deterioration degree considering the number of freeze-thaw cycles is established.The results can provide reference for engineering practice.