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文章以云南省高黎贡山隧道为工程实际,通过地质雷达技术对该隧道的初期支护质量进行检测,对地质雷达在隧道初期支护的检测准确性进行讨论。结果表明:在桩号K6+910~K6+865所测点的平均厚度为31.35cm,大于设计厚度22cm,与施工单位所提供的初喷厚度32cm相近。同时,本次抽测也对钢支撑位置及数量进行了检测,在桩号K6+910~K6+865段钢支撑间距与数量与设计距离和位置几乎一致,部分区域存在微小误差,原因可能与操作方法和施工条件有关。结论:总体上来说,本次检测达到了预期效果,能够证明地质雷达技术的准确性,其误差也是在许可范围内,说明地质雷达技术可以在今后的隧道检测中得以广泛应用。
The paper takes the Gaoligongshan Tunnel in Yunnan Province as an example to test the initial support quality of the tunnel by using GPR technology and discusses the accuracy of the GPR detection in the initial tunnel support. The results show that the average thickness of points measured at stations K6 + 910 ~ K6 + 865 is 31.35cm, which is larger than the designed thickness of 22cm, which is close to the initial spray thickness of 32cm provided by the construction unit. In the meantime, the location and quantity of steel support were also checked in this pumping test. The spacing and number of steel supports in stations K6 + 910 ~ K6 + 865 were almost the same as the design distances and locations, with slight errors in some areas, which may be related to the operation Methods and construction conditions. Conclusion: Generally speaking, this test has achieved the expected result, and can prove the accuracy of the GPR technology. The error is also within the allowable range, indicating that the GPR technology can be widely used in the future tunnel inspection.