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  2021, Vol. 40 Issue (2): 382-389    DOI: 10.13722/j.cnki.jrme.2020.0548
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Research on control criteria of shield tunnel crown settlement based on safety of overlying airport runway
TONG Jianjun1,2,GUI Dengbin1,2,WANG Li1,2,WANG Mingnian1,2,WANG Zhilong1,2
(1. School of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;2. Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)
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Abstract  In response to the problems of runway settlement monitoring and early warning during the construction of shield tunnels underneath airport runways,the force and deformation characteristics of the airport runway structure are analyzed based on mechanics method and,combined with the Peck settlement trough modified calculation formula and the first strength theory of material mechanics,a calculation method and the corresponding flow of the limit value of the soil settlement trough under the runway and the reference value of the vault control are put forward. The research shows that the stiffness of the airport concrete runway surface is quite different from that of the lower soil layers. The runway surface can be simplified as an elastic foundation beam to obtain the maximum values of the bending moment,the deflection and the shear force of the airport runway. Due to the greater stiffness of the runway surface,the method of modifying Peck formula based on the stiffness of the building is used to consider the influence of the runway surface stiffness on the Peck theoretical calculation formula. Combined with the first strength theory,the calculation method and flow of the reference value of the deformation control of the soil and the vault under the runway are proposed. Taking Xianxia West Road underpassing the Hongqiao Airport bypass slide project as an example,the limit of the soil settlement trough under the runway is 5.74 mm calculated by the proposed method,and the lower and upper limits of the tunnel vault settlement control benchmark are respectively 17.39 mm and 13.67 mm according to the relationship between the runway settlement and the vault settlement.
Key wordstunnelling engineering      airport runway      shield tunnel beneath      vacate      settling tank limit      dome settlement control benchmark
     
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TONG Jianjun1
2
GUI Dengbin1
2
WANG Li1
2
WANG Mingnian1
2
WANG Zhilong1
2
Cite this article:   
TONG Jianjun1,2,GUI Dengbin1, et al. Research on control criteria of shield tunnel crown settlement based on safety of overlying airport runway[J]. , 2021, 40(2): 382-389.
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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0548      OR      http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I2/382
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