| Highway maintenance is an important portion in highway operation and management. Subgrade is an importance portion in highway engineering and the basis of pavement. Maintenance evaluation system of highway subgrade is developed with the increasing of highway and the importance of highway maintenance. It can help to evaluate subgrade maintenance performance so that some proof is provided for manager. However, maintenance evaluation system is a new research, which need be studied and consummated.The main purpose of this paper is to present maintenance evaluation methods of highway subgrade, which is evaluated elementarily so that maintenance condition and current are obtained to guide maintenance work. According to the papers about subgrade and subgrade maintenance content, maintanance evaluation index system is developed. And the content of data collection and questionairy are analysed and developed. The rationalization of questionairy is validated by statistic analysis of data colleted in Jiangsu Province.Based on statistic, multianalysis and modeling theory, the relations among evaluation index, objects and subgrade performance are studied about highway subgrade, and evaluation model of highway subgrade is developed. Based on data collected in Jiangsu province, evaluation model is demarcated and validated. So evaluation model fit for Jiangsu highway subgrade is obtained. Eventually, according to evaluation system of subgrade maintenance, software is developed with visual basic program language. |
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