摘要
讨论了路面瞬态振动信号分析处理技术．对振动信号反演分析可获得下部路基结构的剪切波速．建立了 ４种路基密度与瑞雷波速度的相关模型。研制了最佳模型自动选取软件，讨论了压实度建立的标准，从而实现了路基压实度的检测．对振动信号进行频谱分析，可获得路面脱空与否以及路基相对状况的信息．对于路面存在脱空或存在明显软弱路基，其主频值通常小于 ５０ ＨＺ．对路基加固处理后，其剪切波速将会提高，据此可通过对加固前后振动信号的测试，反清路基剪切波速值，实现对路基加固效果的评价．应用结果表明，该技术在上述几个方面可取得显著效果．
The process techniques of transient vibration signal are discussed. With the inverse analysis to the vibration signal, the shear wave velocity of roadbed can be obtained. The four kinds of correlation models of roadbed density with surface wave velocity are presented, and the software is developed of choosing best correlation model. It is discussed that how to form the standard of roadbed compaction degree. And so the test of compaction degree of roadbed can be realized. With the frequency spectrum analysis to the vibration signal, the information can be obtained about road surface separate from roadbed or the state of roadbed. Usually the main frequency value is less than 50 Hz in the condition of road surface separate from roadbed or soft roadbed. Made reinforce to roadbed, the shear wave velocity of roadbed will be increase. According to the theory, through testing the vibration signals before reinforce roadbed and after reinforce roadbed, and making inverse analysis tO the signals to get the shear wave velocity off roadbed, the reinforce effect of roadbed can be evaluated. Applying results indicate that the remarkable success can be achieved with the technique.
出处
《河北工业大学学报》
CAS
2001年第1期57-61,共5页
Journal of Hebei University of Technology
基金
河北省交通厅科学基金资助项目!(Y-0023)
关键词
检测
公路
压实度
加固质量
瞬态振动信号
施工质量
路基
剪切波速
vibration: test: highway: compaction degree: road surface separate from roadbed: reinforce quality
