基于實(shí)測(cè)地應(yīng)力的丹巴水電站深埋軟巖引水隧道變形破壞規(guī)律及穩(wěn)定性研究
[Abstract]:In view of the important influence of in-situ stress on the stability of surrounding rock in underground engineering, the stress and displacement of surrounding rock in tunnel excavation are analyzed by using FLAC3D numerical simulation software on the basis of in-situ stress test. Distribution and stability of plastic zone. The results show that the maximum principal stress of the tunnel is 16.81 脳 16.83MPa, which belongs to the medium ground stress area, and the direction is N30 擄/ 36 擄W, and the angle between the tunnel axis and the tunnel axis is small, and the maximum principal stress of 27.560.31.22 MPa, belongs to the high ground stress area when the buried depth is large. The direction basically deflects 90 擄, and the angle with the tunnel axis is bigger. The maximum stress of tunnel excavation is 36.88 mm for 50 MPa, deformation and the maximum depth of plastic zone is 3.3 mm. The overall stability of surrounding rock is poor. The monitoring results of field deformation, loose ring and failure characteristics verify the rationality of the numerical simulation results. The research results can provide reference for similar projects.
【作者單位】: 山西交通職業(yè)技術(shù)學(xué)院工程管理系;
【分類號(hào)】:TV554
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