气泡轻质土在黄土区桥台差异沉降控制中的应用研究

Research on the Application of Foamed Cement in Differential Settlement Control of Abutment in Loess Region

针对黄土区桥台差异沉降问题,从增大填筑层刚度及减轻填筑材料重量的角度出发,将气泡轻质土引入黄土区桥台差异沉降控制。本文在分析其力学性能、施工工艺的基础上,结合实体工程试验段进行长期监测,结果表明:气泡轻质土可有效控制黄土区桥台沉降,与二灰土换填方式相比,施工后沉降控制效果显著。本研究成果可以为黄土区桥台差异沉降控制措施的选择提供借鉴参考,对气泡轻质土施工有一定的指导作用。

In view of differential settlement of abutment in loess area,from the point of view of increasing the stiffness of filling layer and reducing the weight of filling materials,foamed cement is introduced to control the differential settlement of abutment in loess area.Based on the analysis of its mechanical properties and construction technology,the long-term monitoring is carried out in combination with the test section of the practical project.The results show that the foamed cement can effectively control the settlement of the abutment in the loess area.Compared with the lime-fly ash soil replacement treatment,the effects of post-construction settlement control are significant.The research results can provide a reference for the selection of differential settlement control measures of abutments in loess area,and have a certain guiding significance for the construction of foamed cement.