含水率对级配碎石力学参数的影响性分析  

Analysis on Influence of Moisture Content on Mechanical Parameters of Graded Gravel

作　　者：蔡汶呈[1] 白皓[1] 周泽林[2] 刘宝[3] 杨智翔 

机构地区：[1]四川高速公路建设开发总公司,成都610041 [2]中国十九冶集团有限公司,成都610031 [3]西南交通大学土木工程学院,成都610031

出　　处：《路基工程》2018年第1期1-4,15,共5页Subgrade Engineering

基　　金：国家自然科学基金资助项目:埋入式桩板路基粗颗粒夹层结构应力波传播及动力流固耦合效应研究(51378441)

摘　　要：为进一步探明含水状态对路床级配碎石的影响性,对不同含水率的级配碎石试件开展了多组大型静动三轴试验研究。结果表明:荷载条件一定时,细颗粒含量增多可使级配碎石的临界动应力和抗变形能力降低;最优含水率状态下,路床级配碎石在长期动荷载作用下具有较好的动力稳定性,但在饱和及浸泡水状态时,动力稳定性会降低,此时,动力-水耦合作用下易导致路床发生翻浆唧泥病害。To further study influence of moisture content on graded gravel of roadbed, the groups of large-scale static, dynamic triaxial tests were carried out on such stone specimen with different moisture contents. The result shows that, when the load condition is given, the increment of fine particle content brings down the critical dynamic stress and anti-deformation ability of graded gravel; on the condition of optimal moisture content, the graded gravel of roadbed has good dynamic stability under the action of long-term dynamic load, but on the condition of saturation or soaked in water, the dynamic stability decreases, at this time, dynamicswater coupling effect may cause frost boiling and mud pumping disaster on the roadbed.

关 键 词：级配碎石 翻浆病害 含水率 三轴试验 耦合作用 

分 类 号：TU414.1[建筑科学—岩土工程]