通过资料总结、现场调研、理论分析、现场实施等方法，系统地研究了公路隧道

通过资料总结、现场调研、理论分析、现场实施等方法，系统地研究了公路隧道的病害防治技术、检测方法和检测评估。

結果 (英文) 1:

Through information summaries, field investigation, theoretical analysis, on-site implementation methods, systematic study of highway tunnel defects prevention technology, measurement methods and test and evaluation.

結果 (英文) 2:

Through the summary, field research, theoretical analysis, on-site implementation methods, systematic study of disease control techniques, testing methods and testing to assess highway tunnel.

結果 (英文) 3:

Through the data summary, site investigation, theoretical analysis, on-site implementation methods, disease prevention and control technology, detection method and evaluation system of highway tunnel.