考虑含水量变化的路基回弹模量特性研究  

Characteristic Research on Modulus of Resilience of Roadbed in Consideration of Changes in Water Content

作　　者：严秋荣[1] 邹维列[2] 邓卫东[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]武汉大学土木建筑工程学院,武汉430072

出　　处：《公路交通技术》2010年第5期1-5,共5页Technology of Highway and Transport

基　　金：西部交通建设科技项目(200531874010)

摘　　要：路基回弹模量是表征路基抗变形能力与路面结构设计的重要力学参数,路基含水量是影响路基回弹模量的主要因素,但已有研究很少涉及含水量变化对路基回弹模量的影响规律。探讨路基土中含水量季节性变化规律以及回弹模量随含水量季节性变化规律,通过干湿循环试验,得出不同干湿循环次数、不同干湿循环阶段下甘肃重塑非饱和黄土的回弹模量变化规律。通过研究,可以得出,从工程上减少干湿循环对路基回弹模量的不利影响看,宜在最佳含水量偏湿一侧进行路基碾压。The modulus of resilience of roadbed is an important mechanical parameter to represent non-deformability of roadbed and structural design of pavement,and the water content in roadbed is a major factor influencing the modulus of resilience of roadbed,however previous researches rarely involved influence rules of changes in water content to the modulus of resilience of roadbed.This paper probes into the seasonal change rules of water content in roadbed soil and with which the seasonal change rules of the modulus of resilience,and obtains the change rules of the modulus of resilience of remolded unsaturated loess in Gansu under different times and stages of wet-dry cycles via the wet-dry cycle test.Based on the research a conclusion can be drawn that the roadbed roller compaction is preferably carried out on the wetter side of optimal water content in the view of reducing adverse impacts of wet-dry cycle on the modulus of resilience of roadbed from project.

关 键 词：非饱和黄土 回弹模量 含水量 变化规律 干湿循环 试验研究 

分 类 号：U416.1[交通运输工程—道路与铁道工程]