Failure mechanism of tunnel lining joints and bolts with uneven longitudinal ground settlement |
| |
| Affiliation: | 1. Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;3. Research Institute in Civil and Mechanical Engineering, CNRS, Ecole Centrale de Nantes, Université de Nantes, France;4. Department of Civil Engineering, Clemson University, Clemson, SC 29634-0911, USA;1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;2. Department of Civil Engineering, The University of Akron, Akron, OH 44325, USA |
| |
| Abstract: | To simulate the failure mechanism of tunnel segmental lining joints and longitudinal bolts under uneven longitudinal ground settlement, a numerical model with 3D lining rings and bolts was established. The loads were divided into two parts: the soil pressure around the tunnel just after construction and a displacement loading according to field measurements of uneven longitudinal ground settlement. The interactions between the lining tenons, bolts and their holes, were determined. The results indicated that the deformation of the circumferential joints consisted of opening and dislocation, but the dislocation was dominant. The progressive failure of bolts and waterproofing measures were also revealed. The evaluation of structural integrity of circumferential joint and the mitigate measures were proposed in order to ensure the operational safety of a metro tunnel. |
| |
| Keywords: | Tunnel lining Longitudinal ground settlement Circumferential joint Failure mechanism |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
