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文章以云南省高黎贡山隧道为工程实际,应用空心包体应变计对高黎贡山隧道原岩应力进行测量试验。试验结果表明:应变片应变值在应力解除深度并不深时,应变值呈缓慢增加趋势;随着解除深度的不断增加,应变值迅速增大,最终趋于稳定。通过对高黎贡山隧道原岩应力测试,结果表明:在高地应力隧道中,随着深度的增大,原岩应力值也不断增大,当解除深度达到一定值时,原岩应力值将趋于稳定。结论:空心包体应变计能够较准确对高地应力隧道中对原岩应力进行测试,能够在今后类似工程中得以广泛应用。
In this paper, taking the Gaoligongshan Tunnel in Yunnan Province as an example, the stress measurement of the original rock of the Gaoligongshan Tunnel was carried out by using the hollow inclusion strain gauge. The experimental results show that the strain value of the strain gauge shows a slowly increasing trend when the stress relieving depth is not deep. With the deepening of the deepening, the strain value increases rapidly and eventually becomes stable. Through the test of the original rock stress of the Gaoligongshan tunnel, the results show that the stress of the original rock increases with the increase of the depth in the high-stress tunnel, and the stress of the original rock will tend to reach a certain value stable. CONCLUSION: The hollow inclusion strain gage can test the original rock stress more accurately in the high ground stress tunnel and can be widely used in similar projects in the future.