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[III-286] Comparison of actual displacement with trial calculation of tunnel displacement by continuous strain along advanced borehole

*岡崎 健治¹、倉橋 稔幸¹、亀村 勝美²、村山 秀幸³ (1. 土木研究所寒地土木研究所、2. 深田地質研究所、3. フジタ)

Keywords:tunnel, advanced boring, elastic modulus, strain, displacement

At the time of tunnel construction, horizontal boring survey may be conducted from the face to the front in the direction of the ground, and the ground grade is reviewed from the result of the indoor test by the core and the in-situ test in the hole. In this paper, using the data at the time of tunnel construction, the in-situ elastic modulus along the borehole in front of the face and the strain amount of the ground in front of the face are obtained, and the displacement associated with the tunneling based on these values. The amount was calculated, and the relationship with the displacement measured after actual tunneling was compared and analyzed, and the results are described.