Adaptive design of shield radius for open type hard rock TBM

被引：0
|
作者：
Tian Y.-C. [1 ]
He F. [1 ]
Zhang X. [1 ]
机构：
[1] China Railway Engineering Equipment Group Co. Ltd, Zhengzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2019年 / 53卷 / 12期
关键词：
Hard rock tunnel boring machine (TBM); Radius design; Shield; Tunnel radius;
D O I：
10.3785/j.issn.1008-973X.2019.12.004
中图分类号：
学科分类号：
摘要：
The contact model of shield and tunnel was established in order to analyze the adaptive design of shield radius with tunnel radius for open type hard rock tunnel boring machine (TBM). The shield radius design method was proposed based on the change law of the gap between shield and tunnel, considering finite element analysis of mechanical properties and actual working conditions. Results show that the gap between shield and minimum tunnel at the bottom should be 5 to10 mm. At the horizontal location, the shield should be tangent to the tunnel. The radius of shield is decided by both the minimum and the maximum tunnel radius. The radius of roof shied should be 30 to 50 mm smaller than the designed tunnel radius. The maximum gap between shied and tunnel is positively correlated with the radius difference between them, which is affected by tunnel radius. The bottom shied should be contact with the minimum tunnel radius in the bottom, and the bottom shied radius should be 15 to 50 mm smaller than the designed tunnel radius. © 2019, Zhejiang University Press. All right reserved.
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页码：2280 / 2288
页数：8
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