| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaluation method of the property of a tunnel excavated natural ground capable of efficiently executing a supporting of a tunnel corresponding to the property by safely and accurately deciding the property of an excavated natural ground when the natural ground is excavated as a tunnel by a partial tunnel face excavation machine. SOLUTION: When the tunnel is excavated while pushing a cutter drum put on the front end of a boom of the partial tunnel face excavation machine against the bedrock thereby, and since there is mutual relation between vibration force (maximum amplitude value) of the boom generated in the case of excavation and an evaluation point of the bedrock to be artificially measured, the vibration force of the boom is measured to calculate an evaluation point of the bedrock from the vibration data, and the property of the tunnel excavated bedrock is evaluated.
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