Abstract Abstract：Research purposes： According to the uncertainty and fuzziness on risking assessment of the ground collapse caused by metro construction, this paper qualitative analyzed the essence and influence factors of ground collapse. A semi-quantitative assessment model which used to risk assessment of the ground collapse was established by choosing some key influence factors.
Research conclusions：(1) The risk assessment of the ground collapse is in the basic stability to less stability. (2) At some part of the line, sand layer is closed to the top of tunnel or get into tunnel. Because sand layer has the properties of large thickness and moisture rich, the risk assessment of the ground collapse caused by metro construction is less stability. (3) At some part of the line, because the tunnel across through large thickness of strata rock stratum, the risk assessment of the ground collapse is basic stability. (4)The result of analysis based on the qualitatsnive semi-quantitative method agree with project reality, which has a certain reference significance for geological hazard assessment of similar urban rail transit projects.
|
|
|
|
|
|
