Numerical Simulation of on Mechanical Properties of New Precast Inverted Arch Joint in Highway Tunnel
张亚鹏1, 曲龙1, 刘泾堂2, 袁文厅1, 郝英3
1. Gansu Provincial Highway Aviation Tourism Tian-Zhuang Expressway Management Co., Ltd., Tianshui 741001, Gansu, China; 2. Gansu Province Transportation Planning Survey & Design Institute Co., Ltd., Lanzhou Gansu 730030, China; 3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
Numerical Simulation of on Mechanical Properties of New Precast Inverted Arch Joint in Highway Tunnel
ZHANG Ya-peng1, QU Long1, LIU Jing-tang2, YUAN Wen-guang1, HAO Ying3
1. Gansu Provincial Highway Aviation Tourism Tian-Zhuang Expressway Management Co., Ltd., Tianshui 741001, Gansu, China; 2. Gansu Province Transportation Planning Survey & Design Institute Co., Ltd., Lanzhou Gansu 730030, China; 3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
摘要In order to improve the engineering quality of highway tunnel, accelerate the construction speed, reduce the material consumption and construction cost, and improve the construction environment, this study proposed an optimized precast inverted arch form. ABAQUS was used to establish the three-dimensional finite element model of the precast inverted arch reinforced concrete structure. Considering the influence of different strength grades of bolts, bolt preload, bearing load and steel bars, the mechanical properties of the optimized precast inverted arch structure joints of highway tunnel were analyzed. The results show that the bolt prestress can effectively increase the capacity of the joint to bear positive bending moment. Under large load, the higher the bolt grade, the greater the maximum stress and the smaller the maximum strain; under this precast inverted arch structure, the vulnerable parts of the lower bolt are the connection between the screw and the nut, the vulnerable parts of the upper bolt are the screw, and the vulnerable parts of the concrete joint are the joint and the structural corner. The results have guiding significance for ensuring the safe construction of new prefabricated inverted arch of highway tunnel.
Abstract：In order to improve the engineering quality of highway tunnel, accelerate the construction speed, reduce the material consumption and construction cost, and improve the construction environment, this study proposed an optimized precast inverted arch form. ABAQUS was used to establish the three-dimensional finite element model of the precast inverted arch reinforced concrete structure. Considering the influence of different strength grades of bolts, bolt preload, bearing load and steel bars, the mechanical properties of the optimized precast inverted arch structure joints of highway tunnel were analyzed. The results show that the bolt prestress can effectively increase the capacity of the joint to bear positive bending moment. Under large load, the higher the bolt grade, the greater the maximum stress and the smaller the maximum strain; under this precast inverted arch structure, the vulnerable parts of the lower bolt are the connection between the screw and the nut, the vulnerable parts of the upper bolt are the screw, and the vulnerable parts of the concrete joint are the joint and the structural corner. The results have guiding significance for ensuring the safe construction of new prefabricated inverted arch of highway tunnel.
基金资助:Key Research and Development Project of Gansu Province (No. 21YF1GA381); Science and Technology Project of Gansu Provincial Department of Transportation (No. 2021-09)
通讯作者:
ZHANG Ya-peng
引用本文:
张亚鹏, 曲龙, 刘泾堂, 袁文厅, 郝英. Numerical Simulation of on Mechanical Properties of New Precast Inverted Arch Joint in Highway Tunnel[J]. Journal of Highway and Transportation Research and Development, 2023, 17(4): 27-36.
ZHANG Ya-peng, QU Long, LIU Jing-tang, YUAN Wen-guang, HAO Ying. Numerical Simulation of on Mechanical Properties of New Precast Inverted Arch Joint in Highway Tunnel. Journal of Highway and Transportation Research and Development, 2023, 17(4): 27-36.
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2023, Vol. 17 
