US 12,141,505 B2
Optimization method of shield tunnel starting end reinforcement solution
Jun Hu, Hainan (CN); Jianjian Zhan, Hainan (CN); Wenbo Liu, Hainan (CN); Lu Chen, Hainan (CN); Ming Xiong, Hainan (CN); Hongshuo Zhang, Hainan (CN); Zhixin Wang, Hainan (CN); Hui Zeng, Hainan (CN); and Lin Jia, Hainan (CN)
Assigned to HAINAN UNIVERSITY, Hainan (CN)
Appl. No. 17/593,099
Filed by HAINAN UNIVERSITY, Hainan (CN)
PCT Filed Jul. 14, 2021, PCT No. PCT/CN2021/106244
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2022/236955, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 202110524167.8 (CN), filed on May 13, 2021.
Prior Publication US 2023/0367919 A1, Nov. 16, 2023
Int. Cl. G06F 30/13 (2020.01)
CPC G06F 30/13 (2020.01) 7 Claims
OG exemplary drawing
 
1. An optimization method of shield tunnel starting end reinforcement solution based on construction requirements, comprising the steps of:
step S1, acquiring shield tunnel engineering data and temperature variation curves of temperature measuring holes;
constructing a numerical model with thermal convection according to the shield tunnel engineering data, and obtaining a first temperature variation curve according to the numerical model with thermal convection;
constructing a hydro-thermal coupling numerical model according to the shield tunnel engineering data, and obtaining a second temperature variation curve according to the hydro-thermal coupling numerical model, by setting the constraint conditions, whereby the constraint conditions comprises that the soil mass being a saturated, homogeneous, isotropic and porous medium; a total porosity being constant; an evaporation process of water being neglected; a thermal conduction of frozen porous media satisfying Fourier law; and ice being fixed and undeformed; establishing the geometric model according to the shield tunnel engineering data and carrying out the mesh subdivision; selecting material parameters, determining the load and the boundary condition parameters; establishing a water mass conservation equation and an energy conservation equation; and by acquiring the second temperature variation curve of the simulated temperature measuring holes in the hydro-thermal coupling numerical model corresponding to the actual temperature measuring holes selected for the temperature variation curves of the temperature measuring holes;
comparing the temperature variation curves of the temperature measuring holes, the first temperature variation curve and the second temperature variation curve to obtain an influence of seepage on the development law of a temperature field; and
optimizing a freezing scheme according to the influence of the seepage on the development law of the temperature field to prevent the collapse of the shield tunnel.