US 11,927,098 B2
Method and apparatus for controlling stratum deformation in shield construction process, and non-volatile storage medium
Jian Chen, Shandong (CN); Mingqing Xiao, Shandong (CN); Chengzhen Wang, Shandong (CN); Xiuting Su, Shandong (CN); Shuchen Li, Shandong (CN); Feng Xue, Shandong (CN); Xiudong Li, Shandong (CN); Yankun Wu, Shandong (CN); and Wenhao Sun, Shandong (CN)
Assigned to CHINA RAILWAY 14TH BUREAU GROUP CO., LTD., Shangdong (CN); and CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP CO., LTD., Hubei (CN)
Appl. No. 17/431,725
Filed by CHINA RAILWAY 14TH BUREAU GROUP CO., LTD., Shandong (CN); and CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP CO., LTD., Hubei (CN)
PCT Filed May 7, 2020, PCT No. PCT/CN2020/088938
§ 371(c)(1), (2) Date Aug. 18, 2021,
PCT Pub. No. WO2021/184507, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 202010203051.X (CN), filed on Mar. 20, 2019.
Prior Publication US 2022/0397036 A1, Dec. 15, 2022
Int. Cl. E21D 9/06 (2006.01); E21D 9/093 (2006.01)
CPC E21D 9/0607 (2013.01) [E21D 9/093 (2016.01)] 13 Claims
OG exemplary drawing
 
1. A method for controlling stratum deformation in a shield construction process, comprising:
monitoring settlement characteristic parameters in a shield construction process;
predicting a settlement proportion according to the settlement characteristic parameters, the settlement proportion being a ratio between a predicted settlement value and a corresponding settlement threshold; and
determining construction parameters in the shield construction process according to the settlement proportion;
wherein the stratum deformation process in the shield construction process is divided into five settlement stages, namely a pre-deformation stage, an excavation face deformation stage, a deformation stage in passing process, a shield tail rear deformation stage, and a post-deformation stage; and determining construction parameters in the shield construction process according to the settlement proportion comprises: determining the construction parameters corresponding to the settlement stages according to a settlement proportion of each settlement stage;
wherein determining the construction parameters corresponding to the settlement stages according to a settlement proportion of each settlement stage comprises: determining whether the settlement proportion of each settlement stage is within a corresponding predetermined range; and adjusting the construction parameters corresponding to target settlement stage when the settlement proportion of the target settlement stage is not within the corresponding predetermined range;
wherein the construction parameters corresponding to the pre-deformation stage and the excavation face deformation stage comprise a slurry pressure, the settlement proportion corresponding to the pre-deformation stage is a first settlement proportion, the settlement proportion corresponding to the excavation face deformation stage is a second settlement proportion, the predetermined ranges corresponding to the pre-deformation stage and the excavation face deformation stage are a first predetermined range, a minimum value of the first predetermined range is a first threshold, and a maximum value of the first predetermined range is a second threshold; and adjusting the construction parameters corresponding to target settlement stage when the settlement proportion of the target settlement stage is not within the corresponding predetermined range comprises: reducing the slurry pressure when the first settlement proportion and/or the second settlement proportion are smaller than the first threshold; and increasing the slurry pressure when the first settlement proportion and/or the second settlement proportion are greater than the second threshold.