粉煤灰加筋土挡墙工作机理的离心模型试验研究

Research on Centrifuge Modeling Test to the Working Mechanism of Geogrid Reinforced Flyash Retaining Wall

将能够完全满足模型相似律的离心模型试验方法应用于粉煤灰加筋挡墙研究中。试验基于整体刚性面层加筋土挡墙结构研究了粉煤灰加筋土挡墙的工作机理、筋材中的应变分布、粉煤灰加筋挡墙的变形。结果表明,加筋土挡墙所发生的侧向位移量远小于素土无加筋挡墙的位移量,且加筋层竖向间距越小,加筋层越密,相对侧向位移量越小,加筋效果越明显;因粉煤灰填筑密度较轻,加筋后的挡墙所发生的相对侧向位移量较小,说明加筋效果明显。

The centrifuge modeling test, completely satisfying with modeling similarity law is used in the research of reinforced flyash retaining wall. The experiment is based on the reinforced retaining wall structure of whole rigid panel, working mechanism of reinforced flyash retaining wall, strain distribution of tensile reinforcement, deformation of reinforced flyash retaining wall are researched. It shows that the side displacement of reinforced retaining wall is much smaller than that of non-reinforced retaining wall. In the meantime, the closer tensile reinforcement is, the smaller side displacement would be and the better the effect. The relative side displacement of reinforced retaining wall is smaller because of little density, this illuminates an obvious effect of the reinforced.