土基模量随季节变化规律及其数值的确定  

SEASONAL VARIATIONS OF SUBGRADE SOIL RESILIENT MODULI AND THEIR VALUE DETERMINATION

作　　者：武红娟[1] 徐伟 王选仓[1] 

机构地区：[1]长安大学公路学院 [2]甘肃路桥公路投资有限公司,兰州730030

出　　处：《工程地质学报》2008年第1期32-36,共5页Journal of Engineering Geology

基　　金：国家西部交通建设科技项目(200131882594)

摘　　要：土基回弹模量作为路面设计的重要力学参数,在我国路面设计方法中选取最不利季节的土基回弹模量值作为土基的设计强度,没有考虑一年中含水量变化对土基强度的影响,本文通过分析土基回弹模量随季节含水量的变化规律,借鉴AASHTO设计方法中不同季节模量对路面造成的相对损伤思想,推导出等效回弹模量计算公式uf=0.95×107E-d5,提出用等效土基回弹模量值代替最不利季节模量值作为土基强度设计值,不仅能够提高土基自身的抗变形能力,还可以很有效的提高沥青路面结构的整体设计强度。The resilience of subgrade soil is an important mechanical parameter in pavement design. The design value of subgrade soil intensity often adopts the modulus of resilience testing under the most disadvantageous season. The influence of the changes of water contents to subgrade soil intensity are not taken into account. This paper analyzes the law governing the variation of the subgrade soil resilient modulus with the season water contents. Lessons were drawn from pavement relative damage thought that different season create in design method of AASHTO. equivalent subgrade soil resilient modulus formula is deduced. It is proposed that the design value of subgrade soil intensity replaces the most disadvantage season module with the equivalent subgrade soil modulus of resilience The proposed method can advance non - deformability of soil base and integer design strength of asphalt pavement

关 键 词：含水量 土基回弹模量 土基等效回弹模量 

分 类 号：P642.1[天文地球—工程地质学]