旁压试验测定公路土基回弹模量的应用研究

Application of Pressuremeter Test on Modulus of Resilience of Highway's Foundation

在高速公路旧路改扩建工程中,需对现状路基的结构性能作出评价,以便为改扩建方案设计提供基础资料,土基竖向变形特征即土基回弹模量的现场检测是其中一项重要内容.鉴于现场承载板试验的测试效率不高以及测试过程相对繁杂,而旁压试验测试效率较高,测试过程相对简便,对湖北省武黄高速公路路基作了多个测点的旁压及承载板对比试验,探讨了旁压试验在检测公路路基回弹模量中的可行性,并提出以机械电子工业部勘察研究院的经验关系为基础的模量换算方法,实例证明其有效可行.

In the reconstruction and expansion engineering of highway, in order to provide design data for reconstruction and expansion plans, the structural performances of existing roadbed are necessary to be evaluated. Because of the fact that loading plate test is inefficient and pressuremeter test （PMT） is more convenient and external, some contrastive tests in a freeway in Hubei province were made to probe into the feasibility of utilizing PMT to examine modulus of resilience of highway＇s foundation. Furthermore, a method based on the experiential relation advanced by Ministry of Machine Electronic Industries for converting modulus of deformation to modulus of resilience was put forward, and proved its veracity.