Abstract
In this paper, 25-ton and 27-ton axle heavy trucks are used to carry out moving loading and dynamic real vehicle test on the cracked section, the intact section, and the repaired section of a railway tunnel foundation to test the dynamic performance of the tunnel basement structure with the change of axle loads and health conditions. By analyzing the influence law of dynamic response and fatigue life of heavy haul train under different basement conditions (intact, damaged, and repaired), the adaptability of railway tunnel equipment to freight trucks axle load is clarified. The results show that (1) the intact section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains in good condition. (2) The normal operation of 25-ton and 27-ton axle load freight trucks is seriously affected by the cracked section of the tunnel. When the cracks in the tunnel basement are gradually hollowed out by groundwater, serious traffic accidents such as vehicle shaking and derailment are likely to occur. (3) The repaired section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains after adopting the integrated comprehensive treatment of “Anchor-Injection-Drainage”. The research results will have reference significance for the condition assessment and disease treatment of the basement structure of the heavy haul railway tunnel.
Highlights
Research ArticleWeibin Ma ,1,2 Jinfei Chai ,1,2 Zifeng Zhu, Zili Han ,1,2 Chaofeng Ma, Yuanjun Li, Zhenyu Zhu, Ziyuan Liu, Yabin Niu, Zhanguo Ma, Mu Gu, Guoqiang Zhang, Cheng Li, and Sen Zhang
Heavy haul railway has become the best choice for transporting bulk goods in the world because of its advantages of large volume, high speed, low energy consumption, and low cost
25-ton and 27-ton axle heavy trucks are used to carry out moving loading and dynamic real vehicle test on the cracked section, the intact section, and the repaired section of a railway tunnel foundation. e dynamic pressure stress and vibration acceleration of the tunnel basement structure under the action of 25-ton and 27-ton axle load freight trucks under different health conditions are analyzed. e load characteristics of the foundation of the typical section of the existing railway tunnel under the operation conditions of 25-ton and 27-ton axle load freight trucks as well as the stress and vibration laws of the foundation structure are mastered
Summary
Weibin Ma ,1,2 Jinfei Chai ,1,2 Zifeng Zhu, Zili Han ,1,2 Chaofeng Ma, Yuanjun Li, Zhenyu Zhu, Ziyuan Liu, Yabin Niu, Zhanguo Ma, Mu Gu, Guoqiang Zhang, Cheng Li, and Sen Zhang. By analyzing the influence law of dynamic response and fatigue life of heavy haul train under different basement conditions (intact, damaged, and repaired), the adaptability of railway tunnel equipment to freight trucks axle load is clarified. E results show that (1) the intact section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains in good condition. (2) e normal operation of 25-ton and 27-ton axle load freight trucks is seriously affected by the cracked section of the tunnel. (3) e repaired section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains after adopting the integrated comprehensive treatment of “Anchor-Injection-Drainage”. E research results will have reference significance for the condition assessment and disease treatment of the basement structure of the heavy haul railway tunnel When the cracks in the tunnel basement are gradually hollowed out by groundwater, serious traffic accidents such as vehicle shaking and derailment are likely to occur. (3) e repaired section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains after adopting the integrated comprehensive treatment of “Anchor-Injection-Drainage”. e research results will have reference significance for the condition assessment and disease treatment of the basement structure of the heavy haul railway tunnel
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