土基回弹模量影响因素及其相关关系研究

【作者】 覃绮平；

【导师】 王选仓；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2005， 硕士

【摘要】 本文在对国内各地区有代表性土质进行室内外有关试验研究和处理试验数据和收集整理以往相关资料的基础上,认为土基回弹模量的主要影响因素是含水量和压实度,其中以含水量的影响最为显著,且发现土基回弹模量与这两者间有密切的相关性。 经过研究获得了以下成果:在各地区进行了室内外试验,提出了各种土质的土基回弹模量与稠度、压实度的相关关系式;进行了各地区土基回弹模量与弯沉相关关系研究,获得各典型土质土基回弹模量与弯沉相关关系式;进行了各地区土基回弹模量与CBR关系研究,获得了现场E_o与现场CBR关系式,现场E_o与室内CBR关系式和室内E_o与室内CBR关系式;进行了各地区土基回弹模量与FWD关系研究,认为土基回弹模量与FWD间具有良好的相关性,证明了将FWD所测得模量值换算为静态模量值,用于结构设计或者施工检测完全可行的;经过实地观测,获得了土基回弹模量和路基土含水量随时间的年变化规律:对路基回弹弯沉进行了研究,提出了运用稠度对比法来确定施工控制弯沉,推荐路基的施工弯沉验收标准。更多还原

【Abstract】 In various area in China, through doing a series of relevant experiment to representative soil and analyzing relevant material, this paper think that the main effect element of resilient modulus of pavement subgrade is water content and compaction degree. We found that water content is the most marked in the two factors and the intimate correlation exists in resilient modulus, water content and compaction degree.The below fruit is obtained by the study: Tests outside and interior has been done, and the relationship styles with the different soil about resilient modulus of pavement subgrade, water content and compaction degree were got;The relationship styles with various area of representative soil about the resilient modulus and resilient deflection; The correlation of resilient modulus and CBR was analyzed. The relationship styles between outside resilient modulus and outside CBR were proposed. The relationship styles between outside resilient modulus and inside CBR were suggested. The relationship styles between inside resilient modulus and inside CBR were advanced. The correlation about the resilient modulus in various area and FWD was discussed. The conclusion is that resilient modulus and FWD shows their good correlation. FWD, one new measure method, can be used to measure road strength. Through observing on the spot, we have obtained resilient modulus of pavement subgrade and water content of roadbed soil with changing the law one year of time; The resilient deflection on pavement subgrade has been carried on research, influences coefficient according to season has been put forward to confirm the control about the resilient deflection during pavement subgrade building. The standard about the resilient deflection on the course of pavement subgrade building also has been recommended.更多还原