煤系地层隧道整体下沉的监控量测

The Monitoring of the Integral Settlement of the Tunnel in the Coal Stratum

通过具体实例判断隧道在煤系地层中存在整体下沉现象。具体监控量测方法是在隧底和拱顶布点,观察二者的下沉量是否同步,据此可以判断煤系地层中隧道是否存在整体下沉,随后的施工实践验证了量测结果及由此推断出的结论的正确性。为煤系地层隧道施工提供了一个新的施工监测方法。

With practical projects as examples,the integral settlement of the tunnel in the coal strata is studied and analyzed in the paper.To be more specific,some points for observation are located at both the top of and the bottom of the arch of the tunnel,and the settling extents of the two are compared.It is then found out whether the settlement at those two places is in step,according the result of the observation of which whether there is integral settlement in the tunnel can thus be determined,the correctness of the survey results of which is already verified by the subsequent construction and survey practice.It may serve as a new survey and monitoring method for the construction of tunnels in coal strata.