期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2013
卷号：49
期号：1
出版社：Journal of Theoretical and Applied
摘要：The surrounding rock loosing zone is one of the most critical factors of the tunnels stability. This paper applies the ultrasonic wave method to measure the surrounding zone. In this project, five holes with the diameter of 90 mm and the depth of 7 m are bored in each section. The measured datas indicate that the range of the loosing zone of the tunnel is 1.2 ～ 1.8 m. In order to verify the accuracy of the ultrasonic testing data, the system of borehole television measurement is adopted in the main tunnel. The measurement results are in good agreement with the results of the ultrasonic testing. The results can provide the verification for the rationality of bolt support and the practical experiences and guideline for the design of support system for loosing zone of surrounding rock in the similar tunnel conditions.
