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- Title
岩溶地区地铁隧道盾构施工风险 识别与评价研究.
- Authors
王 祥; 徐 甜; 冉 军; 郭德赛; 苏婉莹
- Abstract
The rock mass of the shield construction section of Guiyang metro line 3 is mainly composed of solution pores, vertical karst caves and dissolution fracture zones. The shield construction under such complex geological conditions has a long construction period and needs complex construction technology. The multifactor analytic hierarchy process was used to study the risk of shield construction of subway tunnel in karst area. Firstly, the risk evaluation index system of shield construction of karst tunnel was established according to the in-situ data and expert consultation, including 3 first-level indicators including shield tunneling risk, surrounding environmental risk, natural and geological risk, 13 second-level indicators including shield machine type selection and cutter head, tool selection, and shield hole reinforcement and the corresponding risk sources. Secondly, the analytic hierarchy process was used to calculate the weight of each risk indexes, and the comprehensive risk index was calculated for the shield construction risk of karst tunnel combined with the expert scoring method. Finally, the construction risk level was determined according to the calculated risk index, and the corresponding risk control measures were given according to the risk acceptance criteria. The constructed risk assessment model was applied to the shield construction of Guiyang Metro Line 3 Nongxueyuan to Huaxi Park Stations, and the overall risk level was Ⅱ. The results are in good agreement with the field construction, indicating that the model has good practicability.
- Subjects
GUIYANG (Guizhou Sheng, China); ANALYTIC hierarchy process; TUNNEL design &; construction; SUBWAY tunnels; ENVIRONMENTAL risk; BUILDING design &; construction; BORING machinery
- Publication
Railway Investigation & Surveying, 2023, Vol 49, Issue 3, p5
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202301070003