达成铁路红层泥岩改良土路基激振试验研究

Study on Vibration Test of Red Mudstone Improved Subgrade of Dazhou-Chengdu Railway

为研究红层泥岩改良土作为达成铁路路基基床底层填料的适应性，进一步扩展红层泥岩在铁路路基工程中的应用，在掌握达成铁路红层泥岩改良土物理力学性质的基础上，使用ZSS50循环加载设备对红层泥岩改良土路基进行了现场激振试验研究，模拟分析了不同轴重列车荷载作用下降雨前、后基床的动态特性及沉降规律。试验结果表明，红层泥岩改良土路基的动态指标及工后沉降等均满足设计要求。

In order to study the applicability of improved red mudstone soil as subgrade fillings in Dazhou- Chengdu Railway and further expand the application of red mudstone in railway subgrade engineering, based on mastering the physical and mechanical characteristics of improved red mudstone soil, site exciter test is carried out on improved red mudstone subgrade with ZSS50 cyclic loading equipment. Dynamic characteristics and settlement rules of foundation bed are analyzed under different cyclic loads with and without the influence of rain. It is indicated from the result that all dynamic red mudstone subgrade meet the design requirement. indicators and post-construction settlement of improved